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mutter/cogl/cogl-sub-texture.c

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cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
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* Copyright (C) 2009,2010 Intel Corporation.
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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*
* 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: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-texture-private.h"
#include "cogl-sub-texture-private.h"
cogl: rename cogl-context.h cogl-context-private.h Since we plan to add public cogl_context_* API we need to rename the current cogl-context.h which contains private member details.
2010-11-04 18:25:52 -04:00
#include "cogl-context-private.h"
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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#include "cogl-handle.h"
#include "cogl-texture-driver.h"
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
#include "cogl-texture-rectangle-private.h"
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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#include <string.h>
#include <math.h>
static void _cogl_sub_texture_free (CoglSubTexture *sub_tex);
Don't define public cogl_is_* functions for internal types This adds a COGL_OBJECT_INTERNAL_DEFINE macro and friends that are the same as COGL_OBJECT_DEFINE except that they prefix the cogl_is_* function with an underscore so that it doesn't get exported in the shared library.
2010-07-09 13:46:31 -04:00
COGL_TEXTURE_INTERNAL_DEFINE (SubTexture, sub_texture);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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static const CoglTextureVtable cogl_sub_texture_vtable;
static void
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
_cogl_sub_texture_unmap_quad (CoglSubTexture *sub_tex,
float *coords)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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{
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
/* NB: coords[] come in as non-normalized if sub_tex->full_texture
* is a CoglTextureRectangle otherwhise they are normalized. The
* coordinates we write out though must always be normalized.
*
* NB: sub_tex->sub_x/y/width/height are in non-normalized
* coordinates.
*/
if (_cogl_is_texture_rectangle (sub_tex->full_texture))
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
{
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
coords[0] = (coords[0] - sub_tex->sub_x) / sub_tex->sub_width;
coords[1] = (coords[1] - sub_tex->sub_y) / sub_tex->sub_height;
coords[2] = (coords[2] - sub_tex->sub_x) / sub_tex->sub_width;
coords[3] = (coords[3] - sub_tex->sub_y) / sub_tex->sub_height;
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
}
else
{
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
float width = cogl_texture_get_width (sub_tex->full_texture);
float height = cogl_texture_get_height (sub_tex->full_texture);
coords[0] = (coords[0] * width - sub_tex->sub_x) / sub_tex->sub_width;
coords[1] = (coords[1] * height - sub_tex->sub_y) / sub_tex->sub_height;
coords[2] = (coords[2] * width - sub_tex->sub_x) / sub_tex->sub_width;
coords[3] = (coords[3] * height - sub_tex->sub_y) / sub_tex->sub_height;
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
}
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
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}
static void
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
_cogl_sub_texture_map_quad (CoglSubTexture *sub_tex,
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
float *coords)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
/* NB: coords[] always come in as normalized coordinates but may go
* out as non-normalized if sub_tex->full_texture is a
* CoglTextureRectangle.
*
* NB: sub_tex->sub_x/y/width/height are in non-normalized
* coordinates.
*/
if (_cogl_is_texture_rectangle (sub_tex->full_texture))
{
coords[0] = coords[0] * sub_tex->sub_width + sub_tex->sub_x;
coords[1] = coords[1] * sub_tex->sub_height + sub_tex->sub_y;
coords[2] = coords[2] * sub_tex->sub_width + sub_tex->sub_x;
coords[3] = coords[3] * sub_tex->sub_height + sub_tex->sub_y;
}
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
else
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
{
float width = cogl_texture_get_width (sub_tex->full_texture);
float height = cogl_texture_get_height (sub_tex->full_texture);
coords[0] = (coords[0] * sub_tex->sub_width + sub_tex->sub_x) / width;
coords[1] = (coords[1] * sub_tex->sub_height + sub_tex->sub_y) / height;
coords[2] = (coords[2] * sub_tex->sub_width + sub_tex->sub_x) / width;
coords[3] = (coords[3] * sub_tex->sub_height + sub_tex->sub_y) / height;
}
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
typedef struct _CoglSubTextureForeachData
{
CoglSubTexture *sub_tex;
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
CoglMetaTextureCallback callback;
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
void *user_data;
} CoglSubTextureForeachData;
static void
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
unmap_coords_cb (CoglTexture *slice_texture,
const float *slice_texture_coords,
const float *meta_coords,
void *user_data)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
CoglSubTextureForeachData *data = user_data;
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
float unmapped_coords[4];
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
memcpy (unmapped_coords, meta_coords, sizeof (unmapped_coords));
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
_cogl_sub_texture_unmap_quad (data->sub_tex, unmapped_coords);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
data->callback (slice_texture,
slice_texture_coords,
unmapped_coords,
data->user_data);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static void
_cogl_sub_texture_foreach_sub_texture_in_region (
CoglTexture *tex,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
CoglMetaTextureCallback callback,
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
void *user_data)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
meta-texture: This publicly exposes CoglMetaTexture CoglMetaTexture is an interface for dealing with high level textures that may be comprised of one or more low-level textures internally. The interface allows the development of primitive drawing APIs that can draw with high-level textures (such as atlas textures) even though the GPU doesn't natively understand these texture types. There is currently just one function that's part of this interface: cogl_meta_texture_foreach_in_region() which allows an application to resolve the internal, low-level textures of a high-level texture. cogl_rectangle() uses this API for example so that it can easily emulate the _REPEAT wrap mode for textures that the hardware can't natively handle repeating of. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-08 09:13:03 -04:00
CoglTexture *full_texture = sub_tex->full_texture;
float mapped_coords[4] =
{ virtual_tx_1, virtual_ty_1, virtual_tx_2, virtual_ty_2};
float virtual_coords[4] =
{ virtual_tx_1, virtual_ty_1, virtual_tx_2, virtual_ty_2};
/* map the virtual coordinates to ->full_texture coordinates */
_cogl_sub_texture_map_quad (sub_tex, mapped_coords);
/* TODO: Add something like cogl_is_low_level_texture() */
if (cogl_is_texture_2d (full_texture) ||
_cogl_is_texture_rectangle (full_texture))
{
callback (sub_tex->full_texture,
mapped_coords,
virtual_coords,
user_data);
}
else
{
CoglSubTextureForeachData data;
data.sub_tex = sub_tex;
data.callback = callback;
data.user_data = user_data;
cogl_meta_texture_foreach_in_region (COGL_META_TEXTURE (full_texture),
mapped_coords[0],
mapped_coords[1],
mapped_coords[2],
mapped_coords[3],
COGL_PIPELINE_WRAP_MODE_REPEAT,
COGL_PIPELINE_WRAP_MODE_REPEAT,
unmap_coords_cb,
&data);
}
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static void
Split the wrap mode of _cogl_texture_set_wrap_mode into three GL supports setting different wrap modes for the s, t and r coordinates so we should design the backend interface to support that also. The r coordinate is not currently used by any of the backends but we might as well have it to make life easier if we ever add support for 3D textures. http://bugzilla.openedhand.com/show_bug.cgi?id=2063
2010-03-25 13:29:22 -04:00
_cogl_sub_texture_set_wrap_mode_parameters (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
Rename the third texure coordinate from 'r' to 'p' Using 'r' to name the third component is problematic because that is commonly used to represent the red component of a vector representing a color. Under GLSL this is awkward because the texture swizzling for a vector uses a single letter for each component and the names for colors, textures and positions are synonymous. GLSL works around this by naming the components of the texture s, t, p and q. Cogl already effectively already exposes this naming because it exposes GLSL so it makes sense to use that naming consistently. Another alternative could be u, v and w. This is what Blender and Direct3D use. However the w component conflicts with the w component of a position vertex.
2010-07-12 12:01:32 -04:00
GLenum wrap_mode_p)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
Split the wrap mode of _cogl_texture_set_wrap_mode into three GL supports setting different wrap modes for the s, t and r coordinates so we should design the backend interface to support that also. The r coordinate is not currently used by any of the backends but we might as well have it to make life easier if we ever add support for 3D textures. http://bugzilla.openedhand.com/show_bug.cgi?id=2063
2010-03-25 13:29:22 -04:00
_cogl_texture_set_wrap_mode_parameters (sub_tex->full_texture,
wrap_mode_s,
wrap_mode_t,
Rename the third texure coordinate from 'r' to 'p' Using 'r' to name the third component is problematic because that is commonly used to represent the red component of a vector representing a color. Under GLSL this is awkward because the texture swizzling for a vector uses a single letter for each component and the names for colors, textures and positions are synonymous. GLSL works around this by naming the components of the texture s, t, p and q. Cogl already effectively already exposes this naming because it exposes GLSL so it makes sense to use that naming consistently. Another alternative could be u, v and w. This is what Blender and Direct3D use. However the w component conflicts with the w component of a position vertex.
2010-07-12 12:01:32 -04:00
wrap_mode_p);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static void
_cogl_sub_texture_free (CoglSubTexture *sub_tex)
{
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
cogl_handle_unref (sub_tex->next_texture);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
cogl_handle_unref (sub_tex->full_texture);
material: Avoid redundant glBindTexture calls This adds a _cogl_bind_gl_texture_transient function that should be used instead of glBindTexture so we can have a consistent cache of the textures bound to each texture unit so we can avoid some redundant binding.
2010-04-26 05:01:43 -04:00
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (sub_tex));
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
CoglHandle
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
_cogl_sub_texture_new (CoglHandle next_texture,
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
int sub_x, int sub_y,
int sub_width, int sub_height)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
CoglHandle full_texture;
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
CoglSubTexture *sub_tex;
CoglTexture *tex;
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
unsigned int next_width, next_height;
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
next_width = cogl_texture_get_width (next_texture);
next_height = cogl_texture_get_height (next_texture);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
/* The region must specify a non-zero subset of the full texture */
Start to reduce dependence on glib Since we've had several developers from admirable projects say they would like to use Cogl but would really prefer not to pull in gobject,gmodule and glib as extra dependencies we are investigating if we can get to the point where glib is only an optional dependency. Actually we feel like we only make minimal use of glib anyway, so it may well be quite straightforward to achieve this. This adds a --disable-glib configure option that can be used to disable features that depend on glib. Actually --disable-glib doesn't strictly disable glib at this point because it's more helpful if cogl continues to build as we make incremental progress towards this. The first use of glib that this patch tackles is the use of g_return_val_if_fail and g_return_if_fail which have been replaced with equivalent _COGL_RETURN_VAL_IF_FAIL and _COGL_RETURN_IF_FAIL macros. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-13 17:34:30 -04:00
_COGL_RETURN_VAL_IF_FAIL (sub_x >= 0 && sub_y >= 0, COGL_INVALID_HANDLE);
_COGL_RETURN_VAL_IF_FAIL (sub_width > 0 && sub_height > 0,
COGL_INVALID_HANDLE);
_COGL_RETURN_VAL_IF_FAIL (sub_x + sub_width <= next_width,
COGL_INVALID_HANDLE);
_COGL_RETURN_VAL_IF_FAIL (sub_y + sub_height <= next_height,
COGL_INVALID_HANDLE);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
sub_tex = g_new (CoglSubTexture, 1);
tex = COGL_TEXTURE (sub_tex);
journal: Support per-framebuffer journals Instead of having a single journal per context, we now have a CoglJournal object for each CoglFramebuffer. This means we now don't have to flush the journal when switching/pushing/popping between different framebuffers so for example a Clutter scene that involves some ClutterEffect actors that transiently redirect to an FBO can still be batched. This also allows us to track state in the journal that relates to the current frame of its associated framebuffer which we'll need for our optimization for using the CPU to handle reading a single pixel back from a framebuffer when we know the whole scene is currently comprised of simple rectangles in a journal.
2011-01-06 08:25:45 -05:00
_cogl_texture_init (tex, &cogl_sub_texture_vtable);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
/* If the next texture is also a sub texture we can avoid one level
of indirection by referencing the full texture of that texture
instead. */
Don't define public cogl_is_* functions for internal types This adds a COGL_OBJECT_INTERNAL_DEFINE macro and friends that are the same as COGL_OBJECT_DEFINE except that they prefix the cogl_is_* function with an underscore so that it doesn't get exported in the shared library.
2010-07-09 13:46:31 -04:00
if (_cogl_is_sub_texture (next_texture))
cogl-sub-texture: Optimise taking a sub texture of a sub texture When creating a Cogl sub-texture, if the full texture is also a sub texture it will now just offset the x and y and reference the full texture instead. This avoids one level of indirection when rendering the texture which reduces the chances of getting rounding errors in the calculations.
2010-02-12 05:08:51 -05:00
{
CoglSubTexture *other_sub_tex =
_cogl_sub_texture_pointer_from_handle (next_texture);
full_texture = other_sub_tex->full_texture;
sub_x += other_sub_tex->sub_x;
sub_y += other_sub_tex->sub_y;
}
else
full_texture = next_texture;
sub_tex->next_texture = cogl_handle_ref (next_texture);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
sub_tex->full_texture = cogl_handle_ref (full_texture);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
sub_tex->sub_x = sub_x;
sub_tex->sub_y = sub_y;
sub_tex->sub_width = sub_width;
sub_tex->sub_height = sub_height;
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
return _cogl_sub_texture_handle_new (sub_tex);
}
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
static int
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_sub_texture_get_max_waste (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
return cogl_texture_get_max_waste (sub_tex->full_texture);
}
static gboolean
_cogl_sub_texture_is_sliced (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
return cogl_texture_is_sliced (sub_tex->full_texture);
}
static gboolean
_cogl_sub_texture_can_hardware_repeat (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
/* We can hardware repeat if the subtexture actually represents all of the
of the full texture */
return (sub_tex->sub_width ==
cogl_texture_get_width (sub_tex->full_texture) &&
sub_tex->sub_height ==
cogl_texture_get_height (sub_tex->full_texture) &&
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_texture_can_hardware_repeat (sub_tex->full_texture));
}
static void
_cogl_sub_texture_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
/* This won't work if the sub texture is not the size of the full
texture and the coordinates are outside the range [0,1] */
*s = ((*s * sub_tex->sub_width + sub_tex->sub_x) /
cogl_texture_get_width (sub_tex->full_texture));
*t = ((*t * sub_tex->sub_height + sub_tex->sub_y) /
cogl_texture_get_height (sub_tex->full_texture));
Remove return from void functions This patch fixes compilation on suncc. http://bugzilla.openedhand.com/show_bug.cgi?id=1978 Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
2010-02-09 05:21:37 -05:00
_cogl_texture_transform_coords_to_gl (sub_tex->full_texture, s, t);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
}
Fix checks for out-of-bounds coordinates and repeats Add a return result from CoglTexture.transform_quad_coords_to_gl(), so that we can properly determine the nature of repeats in the face of GL_TEXTURE_RECTANGLE_ARB, where the returned coordinates are not normalized. The comment "We also work out whether any of the texture coordinates are outside the range [0.0,1.0]. We need to do this after calling transform_coords_to_gl in case the texture backend is munging the coordinates (such as in the sub texture backend)." is disregarded and removed, since it's actually the virtual coordinates that determine whether we repeat, not the GL coordinates. Warnings about disregarded layers are used in all cases where applicable, including for subtextures. http://bugzilla.openedhand.com/show_bug.cgi?id=2016 Signed-off-by: Neil Roberts <neil@linux.intel.com>
2010-03-01 16:49:04 -05:00
static CoglTransformResult
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
_cogl_sub_texture_transform_quad_coords_to_gl (CoglTexture *tex,
float *coords)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
int i;
/* We can't support repeating with this method. In this case
cogl-primitives will resort to manual repeating */
for (i = 0; i < 4; i++)
if (coords[i] < 0.0f || coords[i] > 1.0f)
Fix checks for out-of-bounds coordinates and repeats Add a return result from CoglTexture.transform_quad_coords_to_gl(), so that we can properly determine the nature of repeats in the face of GL_TEXTURE_RECTANGLE_ARB, where the returned coordinates are not normalized. The comment "We also work out whether any of the texture coordinates are outside the range [0.0,1.0]. We need to do this after calling transform_coords_to_gl in case the texture backend is munging the coordinates (such as in the sub texture backend)." is disregarded and removed, since it's actually the virtual coordinates that determine whether we repeat, not the GL coordinates. Warnings about disregarded layers are used in all cases where applicable, including for subtextures. http://bugzilla.openedhand.com/show_bug.cgi?id=2016 Signed-off-by: Neil Roberts <neil@linux.intel.com>
2010-03-01 16:49:04 -05:00
return COGL_TRANSFORM_SOFTWARE_REPEAT;
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
_cogl_sub_texture_map_quad (sub_tex, coords);
Fix checks for out-of-bounds coordinates and repeats Add a return result from CoglTexture.transform_quad_coords_to_gl(), so that we can properly determine the nature of repeats in the face of GL_TEXTURE_RECTANGLE_ARB, where the returned coordinates are not normalized. The comment "We also work out whether any of the texture coordinates are outside the range [0.0,1.0]. We need to do this after calling transform_coords_to_gl in case the texture backend is munging the coordinates (such as in the sub texture backend)." is disregarded and removed, since it's actually the virtual coordinates that determine whether we repeat, not the GL coordinates. Warnings about disregarded layers are used in all cases where applicable, including for subtextures. http://bugzilla.openedhand.com/show_bug.cgi?id=2016 Signed-off-by: Neil Roberts <neil@linux.intel.com>
2010-03-01 16:49:04 -05:00
return _cogl_texture_transform_quad_coords_to_gl (sub_tex->full_texture,
coords);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static gboolean
_cogl_sub_texture_get_gl_texture (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
return cogl_texture_get_gl_texture (sub_tex->full_texture,
out_gl_handle,
out_gl_target);
}
static void
_cogl_sub_texture_set_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
_cogl_texture_set_filters (sub_tex->full_texture, min_filter, mag_filter);
}
static void
cogl-texture: Replace the ensure_mipmaps virtual with pre_paint Instead of the ensure_mipmaps virtual that is only called whenever the texture is about to be rendered with a min filter that needs the mipmap, there is now a pre_paint virtual that is always called when the texture is about to be painted in any way. It has a flags parameter which is used to specify whether the mipmap will be needed. This is useful for CoglTexturePixmapX11 because it needs to do stuff before painting that is unrelated to mipmapping.
2010-06-09 12:39:59 -04:00
_cogl_sub_texture_pre_paint (CoglTexture *tex,
CoglTexturePrePaintFlags flags)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
cogl-texture: Replace the ensure_mipmaps virtual with pre_paint Instead of the ensure_mipmaps virtual that is only called whenever the texture is about to be rendered with a min filter that needs the mipmap, there is now a pre_paint virtual that is always called when the texture is about to be painted in any way. It has a flags parameter which is used to specify whether the mipmap will be needed. This is useful for CoglTexturePixmapX11 because it needs to do stuff before painting that is unrelated to mipmapping.
2010-06-09 12:39:59 -04:00
_cogl_texture_pre_paint (sub_tex->full_texture, flags);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static void
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
_cogl_sub_texture_ensure_non_quad_rendering (CoglTexture *tex)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
}
static gboolean
_cogl_sub_texture_set_region (CoglTexture *tex,
int src_x,
int src_y,
int dst_x,
int dst_y,
unsigned int dst_width,
unsigned int dst_height,
cogl-texture: Share the common code in the set_region virtual There was a lot of common code that was copied to all of the backends to convert the data to a suitable format and wrap it into a CoglBitmap so that it can be passed to _cogl_texture_driver_upload_subregion_to_gl. This patch moves the common code to cogl-texture.c so that the virtual just takes a CoglBitmap that is already in the right format.
2010-07-08 10:15:22 -04:00
CoglBitmap *bmp)
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
{
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
Export API for uploading a tex subregion from a CoglBuffer This exposes 2 experimental functions that make it possible to upload a subregion of a texture from a CoglBuffer by first wrapping the buffer as a CoglBitmap and then allowing uploading of a subregion from a CoglBitmap. The new functions are: cogl_bitmap_new_from_buffer() and cogl_texture_set_region_from_bitmap() Actually for now we are exporting this API for practical reasons since we already had this API internally and it enables a specific feature that was requested, but it is worth nothing that it's quite likely we will replace these with functions that don't involve the CoglBitmap API at some point. For reference: The CoglBitmap API was actually removed from the 2.0 experimental API reference manual some time ago because the hope was that we'd come up with a neater replacement. It doesn't seem entirely clear what the scope of the CoglBitmap api is so it has became a bit of a dumping ground. CoglBitmap is used for image loading, as a means to represent the layout of image data and also internally deals with format conversions. Note: Because we are avoiding including CoglBitmap as part of the 2.0 API these functions aren't currently included in the 2.0 reference manual. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-07-25 17:14:08 -04:00
return cogl_texture_set_region_from_bitmap (sub_tex->full_texture,
src_x, src_y,
dst_x + sub_tex->sub_x,
dst_y + sub_tex->sub_y,
dst_width, dst_height,
bmp);
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static CoglPixelFormat
_cogl_sub_texture_get_format (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
return cogl_texture_get_format (sub_tex->full_texture);
}
static GLenum
_cogl_sub_texture_get_gl_format (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
return _cogl_texture_get_gl_format (sub_tex->full_texture);
}
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
static int
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_sub_texture_get_width (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
return sub_tex->sub_width;
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-09 20:57:32 -05:00
static int
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_sub_texture_get_height (CoglTexture *tex)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
return sub_tex->sub_height;
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
}
static const CoglTextureVtable
cogl_sub_texture_vtable =
{
_cogl_sub_texture_set_region,
Use FBOs and use cogl_read_pixels() to efficiently read partial textures * cogl_texture_get_data() is converted to use _cogl_texture_foreach_sub_texture_in_region() to iterate through the underlying textures. * When we need to read only a portion of the underlying texture, we set up a FBO and use _cogl_read_pixels() to read the portion we need. This is enormously more efficient for reading a small portion of a large atlas texture. * The CoglAtlasTexture, CoglSubTexture, and CoglTexture2dSliced implementation of get_texture() are removed. http://bugzilla.clutter-project.org/show_bug.cgi?id=2414
2010-11-12 11:02:13 -05:00
NULL, /* get_data */
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_sub_texture_foreach_sub_texture_in_region,
_cogl_sub_texture_get_max_waste,
_cogl_sub_texture_is_sliced,
_cogl_sub_texture_can_hardware_repeat,
_cogl_sub_texture_transform_coords_to_gl,
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
_cogl_sub_texture_transform_quad_coords_to_gl,
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_sub_texture_get_gl_texture,
_cogl_sub_texture_set_filters,
cogl-texture: Replace the ensure_mipmaps virtual with pre_paint Instead of the ensure_mipmaps virtual that is only called whenever the texture is about to be rendered with a min filter that needs the mipmap, there is now a pre_paint virtual that is always called when the texture is about to be painted in any way. It has a flags parameter which is used to specify whether the mipmap will be needed. This is useful for CoglTexturePixmapX11 because it needs to do stuff before painting that is unrelated to mipmapping.
2010-06-09 12:39:59 -04:00
_cogl_sub_texture_pre_paint,
cogl: Make CoglSubTexture only work for quad rendering The sub texture backend doesn't work well as a completely general texture backend because for example when rendering with cogl_polygon it needs to be able to tranform arbitrary texture coordinates without reference to the other coordintes. This can't be done when the texture coordinates are a multiple of one because sometimes the coordinate should represent the left or top edge and sometimes it should represent the bottom or top edge. For example if the s coordinates are 0 and 1 then 1 represents the right edge but if they are 1 and 2 then 1 represents the left edge. Instead the sub-textures are now documented not to support coordinates outside the range [0,1]. The coordinates for the sub-region are now represented as integers as this helps avoid rounding issues. The region can no longer be a super-region of the texture as this simplifies the code quite a lot. There are two new texture virtual functions: transform_quad_coords_to_gl - This transforms two pairs of coordinates representing a quad. It will return FALSE if the coordinates can not be transformed. The sub texture backend uses this to detect coordinates that require repeating which causes cogl-primitives to use manual repeating. ensure_non_quad_rendering - This is used in cogl_polygon and cogl_vertex_buffer to inform the texture backend that transform_quad_to_gl is going to be used. The atlas backend migrates the texture out of the atlas when it hits this.
2010-01-18 04:22:04 -05:00
_cogl_sub_texture_ensure_non_quad_rendering,
Split the wrap mode of _cogl_texture_set_wrap_mode into three GL supports setting different wrap modes for the s, t and r coordinates so we should design the backend interface to support that also. The r coordinate is not currently used by any of the backends but we might as well have it to make life easier if we ever add support for 3D textures. http://bugzilla.openedhand.com/show_bug.cgi?id=2063
2010-03-25 13:29:22 -04:00
_cogl_sub_texture_set_wrap_mode_parameters,
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
_cogl_sub_texture_get_format,
_cogl_sub_texture_get_gl_format,
_cogl_sub_texture_get_width,
material: Avoid redundant glBindTexture calls This adds a _cogl_bind_gl_texture_transient function that should be used instead of glBindTexture so we can have a consistent cache of the textures bound to each texture unit so we can avoid some redundant binding.
2010-04-26 05:01:43 -04:00
_cogl_sub_texture_get_height,
NULL /* is_foreign */
cogl: Add a sub texture backend This adds a new texture backend which represents a sub texture of a larger texture. The texture is created with a reference to the full texture and a set of coordinates describing the region. The backend simply defers to the full texture for all operations and maps the coordinates to the other range. You can also use coordinates outside the range [0,1] to create a repeated version of the full texture. A new public API function called cogl_texture_new_from_sub_texture is available to create the sub texture.
2009-11-27 11:39:16 -05:00
};
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