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mutter/cogl/cogl-path.c

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cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
Remove mentions of the FSF address Since using addresses that might change is something that finally the FSF acknowledge as a plausible scenario (after changing address twice), the license blurb in the source files should use the URI for getting the license in case the library did not come with it. Not that URIs cannot possibly change, but at least it's easier to set up a redirection at the same place. As a side note: this commit closes the oldes bug in Clutter's bug report tool. http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 07:56:10 -05:00
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
#include "cogl-object.h"
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
#include "cogl-internal.h"
#include "cogl-context.h"
#include "cogl-journal-private.h"
#include "cogl-material-private.h"
#include "cogl-framebuffer-private.h"
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
#include "cogl-path-private.h"
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
#include <string.h>
#include <math.h>
#define _COGL_MAX_BEZ_RECURSE_DEPTH 16
#ifdef HAVE_COGL_GL
#define glClientActiveTexture ctx->drv.pf_glClientActiveTexture
#endif
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
static void _cogl_path_free (CoglPath *path);
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
COGL_OBJECT_DEFINE (Path, path);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
static void
_cogl_path_data_unref (CoglPathData *data)
{
if (--data->ref_count <= 0)
{
g_array_free (data->path_nodes, TRUE);
g_slice_free (CoglPathData, data);
}
}
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
static void
_cogl_path_modify (CoglPath *path)
{
/* This needs to be called whenever the path is about to be modified
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
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to implement copy-on-write semantics */
/* If there is more than one path using the data then we need to
copy the data instead */
if (path->data->ref_count != 1)
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *old_data = path->data;
path->data = g_slice_dup (CoglPathData, old_data);
path->data->path_nodes = g_array_new (FALSE, FALSE,
sizeof (CoglPathNode));
g_array_append_vals (path->data->path_nodes,
old_data->path_nodes->data,
old_data->path_nodes->len);
path->data->ref_count = 1;
_cogl_path_data_unref (old_data);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
}
}
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
static void
_cogl_path_add_node (gboolean new_sub_path,
float x,
float y)
{
CoglPathNode new_node;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
CoglPath *path;
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path = COGL_PATH (ctx->current_path);
_cogl_path_modify (path);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = path->data;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
new_node.x = x;
new_node.y = y;
new_node.path_size = 0;
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
if (new_sub_path || data->path_nodes->len == 0)
data->last_path = data->path_nodes->len;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
g_array_append_val (data->path_nodes, new_node);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
g_array_index (data->path_nodes, CoglPathNode, data->last_path).path_size++;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
if (data->path_nodes->len == 1)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data->path_nodes_min.x = data->path_nodes_max.x = x;
data->path_nodes_min.y = data->path_nodes_max.y = y;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
else
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
if (x < data->path_nodes_min.x) data->path_nodes_min.x = x;
if (x > data->path_nodes_max.x) data->path_nodes_max.x = x;
if (y < data->path_nodes_min.y) data->path_nodes_min.y = y;
if (y > data->path_nodes_max.y) data->path_nodes_max.y = y;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
}
static void
_cogl_path_stroke_nodes (void)
{
unsigned int path_start = 0;
unsigned long enable_flags = COGL_ENABLE_VERTEX_ARRAY;
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
CoglMaterialFlushOptions options;
material: Adds backend abstraction for fragment processing As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
2010-04-26 05:01:43 -04:00
CoglHandle source;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_cogl_journal_flush ();
/* NB: _cogl_framebuffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_framebuffer_flush_state (_cogl_get_framebuffer (), 0);
enable_flags |= _cogl_material_get_cogl_enable_flags (ctx->source_material);
cogl: rename cogl_enable to _cogl_enable Every now and then someone sees the cogl_enable API and gets confused, thinking its public API so this renames the symbol to be clear that it's is an internal only API.
2010-03-19 05:16:08 -04:00
_cogl_enable (enable_flags);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
options.flags = COGL_MATERIAL_FLUSH_DISABLE_MASK;
/* disable all texture layers */
options.disable_layers = (guint32)~0;
material: Adds backend abstraction for fragment processing As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
2010-04-26 05:01:43 -04:00
if (G_UNLIKELY (ctx->legacy_state_set))
{
source = cogl_material_copy (ctx->source_material);
_cogl_material_apply_legacy_state (source);
}
else
source = ctx->source_material;
_cogl_material_flush_gl_state (source, &options);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
while (path_start < data->path_nodes->len)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathNode *node = &g_array_index (data->path_nodes, CoglPathNode,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
path_start);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
GE( glVertexPointer (2, GL_FLOAT, sizeof (CoglPathNode), &node->x) );
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
GE( glDrawArrays (GL_LINE_STRIP, 0, node->path_size) );
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path_start += node->path_size;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
material: Adds backend abstraction for fragment processing As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
2010-04-26 05:01:43 -04:00
if (G_UNLIKELY (source != ctx->source_material))
cogl_handle_unref (source);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
static void
_cogl_path_get_bounds (floatVec2 nodes_min,
floatVec2 nodes_max,
float *bounds_x,
float *bounds_y,
float *bounds_w,
float *bounds_h)
{
*bounds_x = nodes_min.x;
*bounds_y = nodes_min.y;
*bounds_w = nodes_max.x - *bounds_x;
*bounds_h = nodes_max.y - *bounds_y;
}
void
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
_cogl_add_path_to_stencil_buffer (CoglPath *path,
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
gboolean merge,
gboolean need_clear)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
{
unsigned int path_start = 0;
float bounds_x;
float bounds_y;
float bounds_w;
float bounds_h;
unsigned long enable_flags = COGL_ENABLE_VERTEX_ARRAY;
CoglHandle prev_source;
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
CoglFramebuffer *framebuffer = _cogl_get_framebuffer ();
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
CoglMatrixStack *modelview_stack =
_cogl_framebuffer_get_modelview_stack (framebuffer);
CoglMatrixStack *projection_stack =
_cogl_framebuffer_get_projection_stack (framebuffer);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't track changes to the stencil buffer in the journal
* so we need to flush any batched geometry first */
_cogl_journal_flush ();
/* NB: _cogl_framebuffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_framebuffer_flush_state (framebuffer, 0);
/* Just setup a simple material that doesn't use texturing... */
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
prev_source = cogl_object_ref (ctx->source_material);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl_set_source (ctx->stencil_material);
_cogl_material_flush_gl_state (ctx->source_material, NULL);
enable_flags |=
_cogl_material_get_cogl_enable_flags (ctx->source_material);
cogl: rename cogl_enable to _cogl_enable Every now and then someone sees the cogl_enable API and gets confused, thinking its public API so this renames the symbol to be clear that it's is an internal only API.
2010-03-19 05:16:08 -04:00
_cogl_enable (enable_flags);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
_cogl_path_get_bounds (path->data->path_nodes_min, path->data->path_nodes_max,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
&bounds_x, &bounds_y, &bounds_w, &bounds_h);
GE( glEnable (GL_STENCIL_TEST) );
GE( glColorMask (FALSE, FALSE, FALSE, FALSE) );
GE( glDepthMask (FALSE) );
if (merge)
{
GE (glStencilMask (2));
GE (glStencilFunc (GL_LEQUAL, 0x2, 0x6));
}
else
{
/* If we're not using the stencil buffer for clipping then we
don't need to clear the whole stencil buffer, just the area
that will be drawn */
if (need_clear)
cogl_clear (NULL, COGL_BUFFER_BIT_STENCIL);
else
{
/* Just clear the bounding box */
GE( glStencilMask (~(GLuint) 0) );
GE( glStencilOp (GL_ZERO, GL_ZERO, GL_ZERO) );
cogl_rectangle (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
/* Make sure the rectangle hits the stencil buffer before
* directly changing other GL state. */
_cogl_journal_flush ();
/* NB: The journal flushing may trash the modelview state and
* enable flags */
_cogl_matrix_stack_flush_to_gl (modelview_stack,
COGL_MATRIX_MODELVIEW);
cogl: rename cogl_enable to _cogl_enable Every now and then someone sees the cogl_enable API and gets confused, thinking its public API so this renames the symbol to be clear that it's is an internal only API.
2010-03-19 05:16:08 -04:00
_cogl_enable (enable_flags);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
GE (glStencilMask (1));
GE (glStencilFunc (GL_LEQUAL, 0x1, 0x3));
}
GE (glStencilOp (GL_INVERT, GL_INVERT, GL_INVERT));
cogl-vertex-buffer: Don't disable layers with no texture coords It should be quite acceptable to use a texture without defining any texture coords. For example a shader may be in use that is doing texture lookups without referencing the texture coordinates. Also it should be possible to replace the vertex colors using a texture layer without a texture but with a constant layer color. enable_state_for_drawing_buffer no longer sets any disabled layers in the overrides. Instead of counting the number of units with texture coordinates it now keeps them in a mask. This means there can now be gaps in the list of enabled texture coordinate arrays. To cope with this, the Cogl context now also stores a mask to track the enabled arrays. Instead of code manually iterating each enabled array to disable them, there is now an internal function called _cogl_disable_texcoord_arrays which disables a given mask. I think this could also fix potential bugs when a vertex buffer has gaps in the texture coordinate attributes that it provides. For example if the vertex buffer only had texture coordinates for layer 2 then the disabling code would not disable the coordinates for layers 0 and 1 even though they are not used. This could cause a crash if the previous data for those arrays is no longer valid. http://bugzilla.openedhand.com/show_bug.cgi?id=2132
2010-05-19 19:16:49 -04:00
/* Disable all client texture coordinate arrays */
cogl: Use a CoglBitmask to store the list of used texcoord arrays Instead of directly using a guint32 to store a bitmask for each used texcoord array, it now stores them in a CoglBitmask. This removes the limitation of 32 layers (although there are still other places in Cogl that imply this restriction). To disable texcoord arrays code should call _cogl_disable_other_texcoord_arrays which takes a bitmask of texcoord arrays that should not be disabled. There are two extra bitmasks stored in the CoglContext which are used temporarily for this function to avoid allocating a new bitmask each time. http://bugzilla.openedhand.com/show_bug.cgi?id=2132
2010-05-24 07:40:11 -04:00
_cogl_bitmask_clear_all (&ctx->temp_bitmask);
_cogl_disable_other_texcoord_arrays (&ctx->temp_bitmask);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
while (path_start < path->data->path_nodes->len)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
{
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
CoglPathNode *node =
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
&g_array_index (path->data->path_nodes, CoglPathNode, path_start);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
GE (glVertexPointer (2, GL_FLOAT, sizeof (CoglPathNode), &node->x));
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
GE (glDrawArrays (GL_TRIANGLE_FAN, 0, node->path_size));
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path_start += node->path_size;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
if (merge)
{
/* Now we have the new stencil buffer in bit 1 and the old
stencil buffer in bit 0 so we need to intersect them */
GE (glStencilMask (3));
GE (glStencilFunc (GL_NEVER, 0x2, 0x3));
GE (glStencilOp (GL_DECR, GL_DECR, GL_DECR));
/* Decrement all of the bits twice so that only pixels where the
value is 3 will remain */
_cogl_matrix_stack_push (projection_stack);
_cogl_matrix_stack_load_identity (projection_stack);
_cogl_matrix_stack_flush_to_gl (projection_stack,
COGL_MATRIX_PROJECTION);
_cogl_matrix_stack_push (modelview_stack);
_cogl_matrix_stack_load_identity (modelview_stack);
_cogl_matrix_stack_flush_to_gl (modelview_stack,
COGL_MATRIX_MODELVIEW);
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
cogl_rectangle (-1.0, -1.0, 1.0, 1.0);
/* Make sure these rectangles hit the stencil buffer before we
* restore the stencil op/func. */
_cogl_journal_flush ();
_cogl_matrix_stack_pop (modelview_stack);
_cogl_matrix_stack_pop (projection_stack);
}
GE (glStencilMask (~(GLuint) 0));
GE (glDepthMask (TRUE));
GE (glColorMask (TRUE, TRUE, TRUE, TRUE));
GE (glStencilFunc (GL_EQUAL, 0x1, 0x1));
GE (glStencilOp (GL_KEEP, GL_KEEP, GL_KEEP));
/* restore the original material */
cogl_set_source (prev_source);
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
cogl_object_unref (prev_source);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
static int
compare_ints (gconstpointer a,
gconstpointer b)
{
return GPOINTER_TO_INT(a)-GPOINTER_TO_INT(b);
}
static void
_cogl_path_fill_nodes_scanlines (CoglPathNode *path,
unsigned int path_size,
int bounds_x,
int bounds_y,
unsigned int bounds_w,
unsigned int bounds_h)
{
material: Adds backend abstraction for fragment processing As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
2010-04-26 05:01:43 -04:00
CoglHandle source;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
/* This is our edge list it stores intersections between our
* curve and scanlines, it should probably be implemented with a
* data structure that has smaller overhead for inserting the
* curve/scanline intersections.
*/
GSList **scanlines = g_alloca (bounds_h * sizeof (GSList *));
int i;
int prev_x;
int prev_y;
int first_x;
int first_y;
int lastdir = -2; /* last direction we vere moving */
int lastline = -1; /* the previous scanline we added to */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We are going to use GL to draw directly so make sure any
* previously batched geometry gets to GL before we start...
*/
_cogl_journal_flush ();
/* NB: _cogl_framebuffer_flush_state may disrupt various state (such
* as the material state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_framebuffer_flush_state (_cogl_get_framebuffer (), 0);
material: Adds backend abstraction for fragment processing As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
2010-04-26 05:01:43 -04:00
if (G_UNLIKELY (ctx->legacy_state_set))
{
source = cogl_material_copy (ctx->source_material);
_cogl_material_apply_legacy_state (source);
}
else
source = ctx->source_material;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_cogl_material_flush_gl_state (ctx->source_material, NULL);
cogl: rename cogl_enable to _cogl_enable Every now and then someone sees the cogl_enable API and gets confused, thinking its public API so this renames the symbol to be clear that it's is an internal only API.
2010-03-19 05:16:08 -04:00
_cogl_enable (COGL_ENABLE_VERTEX_ARRAY
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
| (ctx->color_alpha < 255 ? COGL_ENABLE_BLEND : 0));
/* clear scanline intersection lists */
for (i = 0; i < bounds_h; i++)
scanlines[i]=NULL;
first_x = prev_x = path->x;
first_y = prev_y = path->y;
/* create scanline intersection list */
for (i=1; i < path_size; i++)
{
int dest_x = path[i].x;
int dest_y = path[i].y;
int ydir;
int dx;
int dy;
int y;
fill_close:
dx = dest_x - prev_x;
dy = dest_y - prev_y;
if (dy < 0)
ydir = -1;
else if (dy > 0)
ydir = 1;
else
ydir = 0;
/* do linear interpolation between vertices */
for (y = prev_y; y != dest_y; y += ydir)
{
/* only add a point if the scanline has changed and we're
* within bounds.
*/
if (y - bounds_y >= 0 &&
y - bounds_y < bounds_h &&
lastline != y)
{
int x = prev_x + (dx * (y-prev_y)) / dy;
scanlines[ y - bounds_y ]=
g_slist_insert_sorted (scanlines[ y - bounds_y],
GINT_TO_POINTER(x),
compare_ints);
if (ydir != lastdir && /* add a double entry when changing */
lastdir != -2) /* vertical direction */
scanlines[ y - bounds_y ]=
g_slist_insert_sorted (scanlines[ y - bounds_y],
GINT_TO_POINTER(x),
compare_ints);
lastdir = ydir;
lastline = y;
}
}
prev_x = dest_x;
prev_y = dest_y;
/* if we're on the last knot, fake the first vertex being a
next one */
if (path_size == i+1)
{
dest_x = first_x;
dest_y = first_y;
i++; /* to make the loop finally end */
goto fill_close;
}
}
{
int spans = 0;
int span_no;
GLfloat *coords;
/* count number of spans */
for (i = 0; i < bounds_h; i++)
{
GSList *iter = scanlines[i];
while (iter)
{
GSList *next = iter->next;
if (!next)
{
break;
}
/* draw the segments that should be visible */
spans ++;
iter = next->next;
}
}
coords = g_malloc0 (spans * sizeof (GLfloat) * 3 * 2 * 2);
span_no = 0;
/* build list of triangles */
for (i = 0; i < bounds_h; i++)
{
GSList *iter = scanlines[i];
while (iter)
{
GSList *next = iter->next;
GLfloat x_0, x_1;
GLfloat y_0, y_1;
if (!next)
break;
x_0 = GPOINTER_TO_INT (iter->data);
x_1 = GPOINTER_TO_INT (next->data);
y_0 = bounds_y + i;
y_1 = bounds_y + i + 1.0625f;
/* render scanlines 1.0625 high to avoid gaps when
transformed */
coords[span_no * 12 + 0] = x_0;
coords[span_no * 12 + 1] = y_0;
coords[span_no * 12 + 2] = x_1;
coords[span_no * 12 + 3] = y_0;
coords[span_no * 12 + 4] = x_1;
coords[span_no * 12 + 5] = y_1;
coords[span_no * 12 + 6] = x_0;
coords[span_no * 12 + 7] = y_0;
coords[span_no * 12 + 8] = x_0;
coords[span_no * 12 + 9] = y_1;
coords[span_no * 12 + 10] = x_1;
coords[span_no * 12 + 11] = y_1;
span_no ++;
iter = next->next;
}
}
for (i = 0; i < bounds_h; i++)
g_slist_free (scanlines[i]);
/* render triangles */
GE (glVertexPointer (2, GL_FLOAT, 0, coords ));
GE (glDrawArrays (GL_TRIANGLES, 0, spans * 2 * 3));
g_free (coords);
}
material: Adds backend abstraction for fragment processing As part of an effort to improve the architecture of CoglMaterial internally this overhauls how we flush layer state to OpenGL by adding a formal backend abstraction for fragment processing and further formalizing the CoglTextureUnit abstraction. There are three backends: "glsl", "arbfp" and "fixed". The fixed backend uses the OpenGL fixed function APIs to setup the fragment processing, the arbfp backend uses code generation to handle fragment processing using an ARBfp program, and the GLSL backend is currently only there as a formality to handle user programs associated with a material. (i.e. the glsl backend doesn't yet support code generation) The GLSL backend has highest precedence, then arbfp and finally the fixed. If a backend can't support some particular CoglMaterial feature then it will fallback to the next backend. This adds three new COGL_DEBUG options: * "disable-texturing" as expected should disable all texturing * "disable-arbfp" always make the arbfp backend fallback * "disable-glsl" always make the glsl backend fallback * "show-source" show code generated by the arbfp/glsl backends
2010-04-26 05:01:43 -04:00
if (G_UNLIKELY (source != ctx->source_material))
cogl_handle_unref (source);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
static void
_cogl_path_fill_nodes (void)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
float bounds_x;
float bounds_y;
float bounds_w;
float bounds_h;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
_cogl_path_get_bounds (data->path_nodes_min, data->path_nodes_max,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
&bounds_x, &bounds_y, &bounds_w, &bounds_h);
if (G_LIKELY (!(cogl_debug_flags & COGL_DEBUG_FORCE_SCANLINE_PATHS)) &&
cogl_features_available (COGL_FEATURE_STENCIL_BUFFER))
{
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
CoglFramebuffer *framebuffer;
Separate out CoglClipStackState from cogl-clip-stack.c CoglClipStackState has now been renamed to CoglClipState and is moved to a separate file. CoglClipStack now just maintains a stack and doesn't worry about the rest of the state. CoglClipStack sill contains the code to flush the stack to GL.
2010-04-14 14:41:08 -04:00
CoglClipState *clip_state;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_cogl_journal_flush ();
framebuffer = _cogl_get_framebuffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
_cogl_add_path_to_stencil_buffer (ctx->current_path,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
clip_state->stencil_used,
FALSE);
cogl_rectangle (bounds_x, bounds_y,
bounds_x + bounds_w, bounds_y + bounds_h);
/* The stencil buffer now contains garbage so the clip area needs to
* be rebuilt.
*
* NB: We only ever try and update the clip state during
* _cogl_journal_init (when we flush the framebuffer state) which is
* only called when the journal first gets something logged in it; so
* we call cogl_flush() to emtpy the journal.
*/
cogl_flush ();
Separate out CoglClipStackState from cogl-clip-stack.c CoglClipStackState has now been renamed to CoglClipState and is moved to a separate file. CoglClipStack now just maintains a stack and doesn't worry about the rest of the state. CoglClipStack sill contains the code to flush the stack to GL.
2010-04-14 14:41:08 -04:00
_cogl_clip_state_dirty (clip_state);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
else
{
unsigned int path_start = 0;
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
while (path_start < data->path_nodes->len)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathNode *node = &g_array_index (data->path_nodes, CoglPathNode,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
path_start);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
_cogl_path_fill_nodes_scanlines (node, node->path_size,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
bounds_x, bounds_y,
bounds_w, bounds_h);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path_start += node->path_size;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
}
}
void
cogl_path_fill (void)
{
cogl_path_fill_preserve ();
cogl_path_new ();
}
void
cogl_path_fill_preserve (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
if (COGL_PATH (ctx->current_path)->data->path_nodes->len == 0)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
return;
_cogl_path_fill_nodes ();
}
void
cogl_path_stroke (void)
{
cogl_path_stroke_preserve ();
cogl_path_new ();
}
void
cogl_path_stroke_preserve (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
if (COGL_PATH (ctx->current_path)->data->path_nodes->len == 0)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
return;
_cogl_path_stroke_nodes ();
}
void
cogl_path_move_to (float x,
float y)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_cogl_path_add_node (TRUE, x, y);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data->path_start.x = x;
data->path_start.y = y;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data->path_pen = data->path_start;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_rel_move_to (float x,
float y)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_move_to (data->path_pen.x + x,
data->path_pen.y + y);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_line_to (float x,
float y)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_path_add_node (FALSE, x, y);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data->path_pen.x = x;
data->path_pen.y = y;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_rel_line_to (float x,
float y)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_line_to (data->path_pen.x + x,
data->path_pen.y + y);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_close (void)
{
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
CoglPath *path;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path = COGL_PATH (ctx->current_path);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
_cogl_path_add_node (FALSE, path->data->path_start.x,
path->data->path_start.y);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
path->data->path_pen = path->data->path_start;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_new (void)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
cogl_object_unref (ctx->current_path);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
ctx->current_path = _cogl_path_new ();
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_line (float x_1,
float y_1,
float x_2,
float y_2)
{
cogl_path_move_to (x_1, y_1);
cogl_path_line_to (x_2, y_2);
}
void
cogl_path_polyline (float *coords,
int num_points)
{
int c = 0;
cogl_path_move_to (coords[0], coords[1]);
for (c = 1; c < num_points; ++c)
cogl_path_line_to (coords[2*c], coords[2*c+1]);
}
void
cogl_path_polygon (float *coords,
int num_points)
{
cogl_path_polyline (coords, num_points);
cogl_path_close ();
}
void
cogl_path_rectangle (float x_1,
float y_1,
float x_2,
float y_2)
{
cogl_path_move_to (x_1, y_1);
cogl_path_line_to (x_2, y_1);
cogl_path_line_to (x_2, y_2);
cogl_path_line_to (x_1, y_2);
cogl_path_close ();
}
static void
_cogl_path_arc (float center_x,
float center_y,
float radius_x,
float radius_y,
float angle_1,
float angle_2,
float angle_step,
unsigned int move_first)
{
float a = 0x0;
float cosa = 0x0;
float sina = 0x0;
float px = 0x0;
float py = 0x0;
/* Fix invalid angles */
if (angle_1 == angle_2 || angle_step == 0x0)
return;
if (angle_step < 0x0)
angle_step = -angle_step;
/* Walk the arc by given step */
a = angle_1;
while (a != angle_2)
{
cosa = cosf (a * (G_PI/180.0));
sina = sinf (a * (G_PI/180.0));
px = center_x + (cosa * radius_x);
py = center_y + (sina * radius_y);
if (a == angle_1 && move_first)
cogl_path_move_to (px, py);
else
cogl_path_line_to (px, py);
if (G_LIKELY (angle_2 > angle_1))
{
a += angle_step;
if (a > angle_2)
a = angle_2;
}
else
{
a -= angle_step;
if (a < angle_2)
a = angle_2;
}
}
/* Make sure the final point is drawn */
cosa = cosf (angle_2 * (G_PI/180.0));
sina = sinf (angle_2 * (G_PI/180.0));
px = center_x + (cosa * radius_x);
py = center_y + (sina * radius_y);
cogl_path_line_to (px, py);
}
void
cogl_path_arc (float center_x,
float center_y,
float radius_x,
float radius_y,
float angle_1,
float angle_2)
{
float angle_step = 10;
/* it is documented that a move to is needed to create a freestanding
* arc
*/
_cogl_path_arc (center_x, center_y,
radius_x, radius_y,
angle_1, angle_2,
angle_step, 0 /* no move */);
}
cogl-path: Make cogl_path_arc_rel static cogl_path_arc_rel was never in any public headers so it isn't part of the public API. It also has a slightly inconsistent name because the rest of the relative path functions are called cogl_path_rel_*. This patch makes it static for now to make it more obvious that it isn't public. The name has changed to _cogl_path_rel_arc.
2010-04-22 13:14:40 -04:00
static void
_cogl_path_rel_arc (float center_x,
float center_y,
float radius_x,
float radius_y,
float angle_1,
float angle_2,
float angle_step)
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
_cogl_path_arc (data->path_pen.x + center_x,
data->path_pen.y + center_y,
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
radius_x, radius_y,
angle_1, angle_2,
angle_step, 0 /* no move */);
}
void
cogl_path_ellipse (float center_x,
float center_y,
float radius_x,
float radius_y)
{
float angle_step = 10;
/* FIXME: if shows to be slow might be optimized
* by mirroring just a quarter of it */
_cogl_path_arc (center_x, center_y,
radius_x, radius_y,
0, 360,
angle_step, 1 /* move first */);
cogl_path_close();
}
void
cogl_path_round_rectangle (float x_1,
float y_1,
float x_2,
float y_2,
float radius,
float arc_step)
{
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
CoglPath *path;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
float inner_width = x_2 - x_1 - radius * 2;
float inner_height = y_2 - y_1 - radius * 2;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path = COGL_PATH (ctx->current_path);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl_path_move_to (x_1, y_1 + radius);
cogl-path: Make cogl_path_arc_rel static cogl_path_arc_rel was never in any public headers so it isn't part of the public API. It also has a slightly inconsistent name because the rest of the relative path functions are called cogl_path_rel_*. This patch makes it static for now to make it more obvious that it isn't public. The name has changed to _cogl_path_rel_arc.
2010-04-22 13:14:40 -04:00
_cogl_path_rel_arc (radius, 0,
radius, radius,
180,
270,
arc_step);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_line_to (path->data->path_pen.x + inner_width,
path->data->path_pen.y);
cogl-path: Make cogl_path_arc_rel static cogl_path_arc_rel was never in any public headers so it isn't part of the public API. It also has a slightly inconsistent name because the rest of the relative path functions are called cogl_path_rel_*. This patch makes it static for now to make it more obvious that it isn't public. The name has changed to _cogl_path_rel_arc.
2010-04-22 13:14:40 -04:00
_cogl_path_rel_arc (0, radius,
radius, radius,
-90,
0,
arc_step);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_line_to (path->data->path_pen.x,
path->data->path_pen.y + inner_height);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Make cogl_path_arc_rel static cogl_path_arc_rel was never in any public headers so it isn't part of the public API. It also has a slightly inconsistent name because the rest of the relative path functions are called cogl_path_rel_*. This patch makes it static for now to make it more obvious that it isn't public. The name has changed to _cogl_path_rel_arc.
2010-04-22 13:14:40 -04:00
_cogl_path_rel_arc (-radius, 0,
radius, radius,
0,
90,
arc_step);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_line_to (path->data->path_pen.x - inner_width,
path->data->path_pen.y);
cogl-path: Make cogl_path_arc_rel static cogl_path_arc_rel was never in any public headers so it isn't part of the public API. It also has a slightly inconsistent name because the rest of the relative path functions are called cogl_path_rel_*. This patch makes it static for now to make it more obvious that it isn't public. The name has changed to _cogl_path_rel_arc.
2010-04-22 13:14:40 -04:00
_cogl_path_rel_arc (0, -radius,
radius, radius,
90,
180,
arc_step);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cogl_path_close ();
}
static void
_cogl_path_bezier3_sub (CoglBezCubic *cubic)
{
CoglBezCubic cubics[_COGL_MAX_BEZ_RECURSE_DEPTH];
CoglBezCubic *cleft;
CoglBezCubic *cright;
CoglBezCubic *c;
floatVec2 dif1;
floatVec2 dif2;
floatVec2 mm;
floatVec2 c1;
floatVec2 c2;
floatVec2 c3;
floatVec2 c4;
floatVec2 c5;
int cindex;
/* Put first curve on stack */
cubics[0] = *cubic;
cindex = 0;
while (cindex >= 0)
{
c = &cubics[cindex];
/* Calculate distance of control points from their
* counterparts on the line between end points */
dif1.x = (c->p2.x * 3) - (c->p1.x * 2) - c->p4.x;
dif1.y = (c->p2.y * 3) - (c->p1.y * 2) - c->p4.y;
dif2.x = (c->p3.x * 3) - (c->p4.x * 2) - c->p1.x;
dif2.y = (c->p3.y * 3) - (c->p4.y * 2) - c->p1.y;
if (dif1.x < 0)
dif1.x = -dif1.x;
if (dif1.y < 0)
dif1.y = -dif1.y;
if (dif2.x < 0)
dif2.x = -dif2.x;
if (dif2.y < 0)
dif2.y = -dif2.y;
/* Pick the greatest of two distances */
if (dif1.x < dif2.x) dif1.x = dif2.x;
if (dif1.y < dif2.y) dif1.y = dif2.y;
/* Cancel if the curve is flat enough */
if (dif1.x + dif1.y <= 1.0 ||
cindex == _COGL_MAX_BEZ_RECURSE_DEPTH-1)
{
/* Add subdivision point (skip last) */
if (cindex == 0)
return;
_cogl_path_add_node (FALSE, c->p4.x, c->p4.y);
--cindex;
continue;
}
/* Left recursion goes on top of stack! */
cright = c; cleft = &cubics[++cindex];
/* Subdivide into 2 sub-curves */
c1.x = ((c->p1.x + c->p2.x) / 2);
c1.y = ((c->p1.y + c->p2.y) / 2);
mm.x = ((c->p2.x + c->p3.x) / 2);
mm.y = ((c->p2.y + c->p3.y) / 2);
c5.x = ((c->p3.x + c->p4.x) / 2);
c5.y = ((c->p3.y + c->p4.y) / 2);
c2.x = ((c1.x + mm.x) / 2);
c2.y = ((c1.y + mm.y) / 2);
c4.x = ((mm.x + c5.x) / 2);
c4.y = ((mm.y + c5.y) / 2);
c3.x = ((c2.x + c4.x) / 2);
c3.y = ((c2.y + c4.y) / 2);
/* Add left recursion to stack */
cleft->p1 = c->p1;
cleft->p2 = c1;
cleft->p3 = c2;
cleft->p4 = c3;
/* Add right recursion to stack */
cright->p1 = c3;
cright->p2 = c4;
cright->p3 = c5;
cright->p4 = c->p4;
}
}
void
cogl_path_curve_to (float x_1,
float y_1,
float x_2,
float y_2,
float x_3,
float y_3)
{
CoglBezCubic cubic;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
CoglPath *path;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path = COGL_PATH (ctx->current_path);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
/* Prepare cubic curve */
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cubic.p1 = path->data->path_pen;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
cubic.p2.x = x_1;
cubic.p2.y = y_1;
cubic.p3.x = x_2;
cubic.p3.y = y_2;
cubic.p4.x = x_3;
cubic.p4.y = y_3;
/* Run subdivision */
_cogl_path_bezier3_sub (&cubic);
/* Add last point */
_cogl_path_add_node (FALSE, cubic.p4.x, cubic.p4.y);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
path->data->path_pen = cubic.p4;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_path_rel_curve_to (float x_1,
float y_1,
float x_2,
float y_2,
float x_3,
float y_3)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_curve_to (data->path_pen.x + x_1,
data->path_pen.y + y_1,
data->path_pen.x + x_2,
data->path_pen.y + y_2,
data->path_pen.x + x_3,
data->path_pen.y + y_3);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
CoglPath *
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
_cogl_path_new (void)
{
CoglPath *path;
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path = g_slice_new (CoglPath);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = path->data = g_slice_new (CoglPathData);
data->ref_count = 1;
data->path_nodes = g_array_new (FALSE, FALSE, sizeof (CoglPathNode));
data->last_path = 0;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
return _cogl_path_object_new (path);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
}
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
CoglPath *
cogl_path_copy (CoglPath *old_path)
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
{
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
CoglPath *new_path;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
analysis: FALSE/0 used in pointer context While this is totally fine (0 in the pointer context will be converted in the right internal NULL representation, which could be a value with some bits to 1), I believe it's clearer to use NULL in the pointer context. It seems that, in most case, it's more an overlook than a deliberate choice to use FALSE/0 as NULL, eg. copying a _COGL_GET_CONTEXT (ctx, 0) or a g_return_val_if_fail (cond, 0) from a function returning a gboolean.
2010-05-27 03:28:29 -04:00
_COGL_GET_CONTEXT (ctx, NULL);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
if (!cogl_is_path (old_path))
return NULL;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
new_path = g_slice_new (CoglPath);
new_path->data = old_path->data;
new_path->data->ref_count++;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path: Remove use of CoglHandle in the CoglPath API This replaces the use of CoglHandle with strongly type CoglPath * pointers instead. The only function not converted for now is cogl_is_path which will be done in a later commit.
2010-05-27 19:35:47 -04:00
return _cogl_path_object_new (new_path);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
}
static void
_cogl_path_free (CoglPath *path)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
_cogl_path_data_unref (path->data);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
g_slice_free (CoglPath, path);
}
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
/* If second order beziers were needed the following code could
* be re-enabled:
*/
#if 0
static void
_cogl_path_bezier2_sub (CoglBezQuad *quad)
{
CoglBezQuad quads[_COGL_MAX_BEZ_RECURSE_DEPTH];
CoglBezQuad *qleft;
CoglBezQuad *qright;
CoglBezQuad *q;
floatVec2 mid;
floatVec2 dif;
floatVec2 c1;
floatVec2 c2;
floatVec2 c3;
int qindex;
/* Put first curve on stack */
quads[0] = *quad;
qindex = 0;
/* While stack is not empty */
while (qindex >= 0)
{
q = &quads[qindex];
/* Calculate distance of control point from its
* counterpart on the line between end points */
mid.x = ((q->p1.x + q->p3.x) / 2);
mid.y = ((q->p1.y + q->p3.y) / 2);
dif.x = (q->p2.x - mid.x);
dif.y = (q->p2.y - mid.y);
if (dif.x < 0) dif.x = -dif.x;
if (dif.y < 0) dif.y = -dif.y;
/* Cancel if the curve is flat enough */
if (dif.x + dif.y <= 1.0 ||
qindex == _COGL_MAX_BEZ_RECURSE_DEPTH - 1)
{
/* Add subdivision point (skip last) */
if (qindex == 0) return;
_cogl_path_add_node (FALSE, q->p3.x, q->p3.y);
--qindex; continue;
}
/* Left recursion goes on top of stack! */
qright = q; qleft = &quads[++qindex];
/* Subdivide into 2 sub-curves */
c1.x = ((q->p1.x + q->p2.x) / 2);
c1.y = ((q->p1.y + q->p2.y) / 2);
c3.x = ((q->p2.x + q->p3.x) / 2);
c3.y = ((q->p2.y + q->p3.y) / 2);
c2.x = ((c1.x + c3.x) / 2);
c2.y = ((c1.y + c3.y) / 2);
/* Add left recursion onto stack */
qleft->p1 = q->p1;
qleft->p2 = c1;
qleft->p3 = c2;
/* Add right recursion onto stack */
qright->p1 = c2;
qright->p2 = c3;
qright->p3 = q->p3;
}
}
void
cogl_path_curve2_to (float x_1,
float y_1,
float x_2,
float y_2)
{
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
CoglPath *path;
CoglBezQuad quad;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
path = COGL_PATH (ctx->current_path);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
/* Prepare quadratic curve */
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
quad.p1 = path->data->path_pen;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
quad.p2.x = x_1;
quad.p2.y = y_1;
quad.p3.x = x_2;
quad.p3.y = y_2;
/* Run subdivision */
_cogl_path_bezier2_sub (&quad);
/* Add last point */
_cogl_path_add_node (FALSE, quad.p3.x, quad.p3.y);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
path->data->path_pen = quad.p3;
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
void
cogl_rel_curve2_to (float x_1,
float y_1,
float x_2,
float y_2)
{
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
CoglPathData *data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
data = COGL_PATH (ctx->current_path)->data;
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl-path: Use true copy-on-write semantics Previously a path copy was implemented such that only the array of path nodes was shared with the source and the rest of the data is copied. This was so that the copy could avoid a deep copy if the source path is appended to because the copy keeps track of its own length. This optimisation is probably not worthwhile because it makes the copies less cheap. Instead the CoglPath struct now just contains a single pointer to a new CoglPathData struct which is separately ref-counted. When the path is modified it will be copied if the ref count on the data is not 1.
2010-04-22 06:58:52 -04:00
cogl_path_curve2_to (data->path_pen.x + x_1,
data->path_pen.y + y_1,
data->path_pen.x + x_2,
data->path_pen.y + y_2);
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
}
cogl: Support retained paths This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
2010-04-08 12:43:27 -04:00
cogl: cleanly separate primitives + paths code The function prototypes for the primitives API were spread between cogl-path.h and cogl-texture.h and should have been in a cogl-primitives.h. As well as shuffling the prototypes around into more sensible places this commit splits the cogl-path API out from cogl-primitives.c into a cogl-path.c
2010-02-10 17:30:37 -05:00
#endif
cogl-path: Renames cogl_path_get/set cogl_get/set_path These aren't path methods so aren't consistent with the cogl_object_method naming style we are aiming for.
2010-06-01 12:34:59 -04:00
CoglPath *
cogl_get_path (void)
{
_COGL_GET_CONTEXT (ctx, NULL);
return ctx->current_path;
}
void
cogl_set_path (CoglPath *path)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_path (path))
return;
/* Reference the new object first in case it is the same as the old
object */
cogl_object_ref (path);
cogl_object_unref (ctx->current_path);
ctx->current_path = path;
}
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