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mutter/cogl/cogl-attribute.c
Robert Bragg a0441778ad This re-licenses Cogl 1.18 under the MIT license 
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.

This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html

Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)

For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10  0bbf50f905..HEAD

We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html

Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January

As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.

This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
2014-02-22 02:02:53 +00:00

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/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2010 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-util.h"
#include "cogl-context-private.h"
#include "cogl-object-private.h"
#include "cogl-journal-private.h"
#include "cogl-attribute.h"
#include "cogl-attribute-private.h"
#include "cogl-pipeline.h"
#include "cogl-pipeline-private.h"
#include "cogl-pipeline-opengl-private.h"
#include "cogl-texture-private.h"
#include "cogl-framebuffer-private.h"
#include "cogl-indices-private.h"
#ifdef COGL_PIPELINE_PROGEND_GLSL
#include "cogl-pipeline-progend-glsl-private.h"
#endif
#include "cogl-private.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
/* This isn't defined in the GLES headers */
#ifndef GL_UNSIGNED_INT
#define GL_UNSIGNED_INT 0x1405
#endif
static void _cogl_attribute_free (CoglAttribute *attribute);
COGL_OBJECT_DEFINE (Attribute, attribute);
static CoglBool
validate_cogl_attribute_name (const char *name,
char **real_attribute_name,
CoglAttributeNameID *name_id,
CoglBool *normalized,
int *layer_number)
{
name = name + 5; /* skip "cogl_" */
*normalized = FALSE;
*layer_number = 0;
if (strcmp (name, "position_in") == 0)
*name_id = COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY;
else if (strcmp (name, "color_in") == 0)
{
*name_id = COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY;
*normalized = TRUE;
}
else if (strcmp (name, "tex_coord_in") == 0)
{
*real_attribute_name = "cogl_tex_coord0_in";
*name_id = COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY;
}
else if (strncmp (name, "tex_coord", strlen ("tex_coord")) == 0)
{
char *endptr;
*layer_number = strtoul (name + 9, &endptr, 10);
if (strcmp (endptr, "_in") != 0)
{
g_warning ("Texture coordinate attributes should either be named "
"\"cogl_tex_coord_in\" or named with a texture unit index "
"like \"cogl_tex_coord2_in\"\n");
return FALSE;
}
*name_id = COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY;
}
else if (strcmp (name, "normal_in") == 0)
{
*name_id = COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY;
*normalized = TRUE;
}
else if (strcmp (name, "point_size_in") == 0)
*name_id = COGL_ATTRIBUTE_NAME_ID_POINT_SIZE_ARRAY;
else
{
g_warning ("Unknown cogl_* attribute name cogl_%s\n", name);
return FALSE;
}
return TRUE;
}
CoglAttributeNameState *
_cogl_attribute_register_attribute_name (CoglContext *context,
const char *name)
{
CoglAttributeNameState *name_state = g_new (CoglAttributeNameState, 1);
int name_index = context->n_attribute_names++;
char *name_copy = g_strdup (name);
name_state->name = NULL;
name_state->name_index = name_index;
if (strncmp (name, "cogl_", 5) == 0)
{
if (!validate_cogl_attribute_name (name,
&name_state->name,
&name_state->name_id,
&name_state->normalized_default,
&name_state->layer_number))
goto error;
}
else
{
name_state->name_id = COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY;
name_state->normalized_default = FALSE;
name_state->layer_number = 0;
}
if (name_state->name == NULL)
name_state->name = name_copy;
g_hash_table_insert (context->attribute_name_states_hash,
name_copy, name_state);
if (G_UNLIKELY (context->attribute_name_index_map == NULL))
context->attribute_name_index_map =
g_array_new (FALSE, FALSE, sizeof (void *));
g_array_set_size (context->attribute_name_index_map, name_index + 1);
g_array_index (context->attribute_name_index_map,
CoglAttributeNameState *, name_index) = name_state;
return name_state;
error:
g_free (name_state);
return NULL;
}
static CoglBool
validate_n_components (const CoglAttributeNameState *name_state,
int n_components)
{
switch (name_state->name_id)
{
case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
if (G_UNLIKELY (n_components == 1))
{
g_critical ("glVertexPointer doesn't allow 1 component vertex "
"positions so we currently only support \"cogl_vertex\" "
"attributes where n_components == 2, 3 or 4");
return FALSE;
}
break;
case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
if (G_UNLIKELY (n_components != 3 && n_components != 4))
{
g_critical ("glColorPointer expects 3 or 4 component colors so we "
"currently only support \"cogl_color\" attributes where "
"n_components == 3 or 4");
return FALSE;
}
break;
case COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY:
break;
case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
if (G_UNLIKELY (n_components != 3))
{
g_critical ("glNormalPointer expects 3 component normals so we "
"currently only support \"cogl_normal\" attributes "
"where n_components == 3");
return FALSE;
}
break;
case COGL_ATTRIBUTE_NAME_ID_POINT_SIZE_ARRAY:
if (G_UNLIKELY (n_components != 1))
{
g_critical ("The point size attribute can only have one "
"component");
return FALSE;
}
break;
case COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY:
return TRUE;
}
return TRUE;
}
CoglAttribute *
cogl_attribute_new (CoglAttributeBuffer *attribute_buffer,
const char *name,
size_t stride,
size_t offset,
int n_components,
CoglAttributeType type)
{
CoglAttribute *attribute = g_slice_new (CoglAttribute);
CoglBuffer *buffer = COGL_BUFFER (attribute_buffer);
CoglContext *ctx = buffer->context;
attribute->is_buffered = TRUE;
attribute->name_state =
g_hash_table_lookup (ctx->attribute_name_states_hash, name);
if (!attribute->name_state)
{
CoglAttributeNameState *name_state =
_cogl_attribute_register_attribute_name (ctx, name);
if (!name_state)
goto error;
attribute->name_state = name_state;
}
attribute->d.buffered.attribute_buffer = cogl_object_ref (attribute_buffer);
attribute->d.buffered.stride = stride;
attribute->d.buffered.offset = offset;
attribute->d.buffered.n_components = n_components;
attribute->d.buffered.type = type;
attribute->immutable_ref = 0;
if (attribute->name_state->name_id != COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY)
{
if (!validate_n_components (attribute->name_state, n_components))
return NULL;
attribute->normalized =
attribute->name_state->normalized_default;
}
else
attribute->normalized = FALSE;
return _cogl_attribute_object_new (attribute);
error:
_cogl_attribute_free (attribute);
return NULL;
}
static CoglAttribute *
_cogl_attribute_new_const (CoglContext *context,
const char *name,
int n_components,
int n_columns,
CoglBool transpose,
const float *value)
{
CoglAttribute *attribute = g_slice_new (CoglAttribute);
attribute->name_state =
g_hash_table_lookup (context->attribute_name_states_hash, name);
if (!attribute->name_state)
{
CoglAttributeNameState *name_state =
_cogl_attribute_register_attribute_name (context, name);
if (!name_state)
goto error;
attribute->name_state = name_state;
}
if (!validate_n_components (attribute->name_state, n_components))
goto error;
attribute->is_buffered = FALSE;
attribute->normalized = FALSE;
attribute->d.constant.context = cogl_object_ref (context);
attribute->d.constant.boxed.v.array = NULL;
if (n_columns == 1)
{
_cogl_boxed_value_set_float (&attribute->d.constant.boxed,
n_components,
1,
value);
}
else
{
/* FIXME: Up until GL[ES] 3 only square matrices were supported
* and we don't currently expose non-square matrices in Cogl.
*/
_COGL_RETURN_VAL_IF_FAIL (n_columns == n_components, NULL);
_cogl_boxed_value_set_matrix (&attribute->d.constant.boxed,
n_columns,
1,
transpose,
value);
}
return _cogl_attribute_object_new (attribute);
error:
_cogl_attribute_free (attribute);
return NULL;
}
CoglAttribute *
cogl_attribute_new_const_1f (CoglContext *context,
const char *name,
float value)
{
return _cogl_attribute_new_const (context,
name,
1, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
&value);
}
CoglAttribute *
cogl_attribute_new_const_2fv (CoglContext *context,
const char *name,
const float *value)
{
return _cogl_attribute_new_const (context,
name,
2, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
value);
}
CoglAttribute *
cogl_attribute_new_const_3fv (CoglContext *context,
const char *name,
const float *value)
{
return _cogl_attribute_new_const (context,
name,
3, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
value);
}
CoglAttribute *
cogl_attribute_new_const_4fv (CoglContext *context,
const char *name,
const float *value)
{
return _cogl_attribute_new_const (context,
name,
4, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
value);
}
CoglAttribute *
cogl_attribute_new_const_2f (CoglContext *context,
const char *name,
float component0,
float component1)
{
float vec2[2] = { component0, component1 };
return _cogl_attribute_new_const (context,
name,
2, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
vec2);
}
CoglAttribute *
cogl_attribute_new_const_3f (CoglContext *context,
const char *name,
float component0,
float component1,
float component2)
{
float vec3[3] = { component0, component1, component2 };
return _cogl_attribute_new_const (context,
name,
3, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
vec3);
}
CoglAttribute *
cogl_attribute_new_const_4f (CoglContext *context,
const char *name,
float component0,
float component1,
float component2,
float component3)
{
float vec4[4] = { component0, component1, component2, component3 };
return _cogl_attribute_new_const (context,
name,
4, /* n_components */
1, /* 1 column vector */
FALSE, /* no transpose */
vec4);
}
CoglAttribute *
cogl_attribute_new_const_2x2fv (CoglContext *context,
const char *name,
const float *matrix2x2,
CoglBool transpose)
{
return _cogl_attribute_new_const (context,
name,
2, /* n_components */
2, /* 2 column vector */
FALSE, /* no transpose */
matrix2x2);
}
CoglAttribute *
cogl_attribute_new_const_3x3fv (CoglContext *context,
const char *name,
const float *matrix3x3,
CoglBool transpose)
{
return _cogl_attribute_new_const (context,
name,
3, /* n_components */
3, /* 3 column vector */
FALSE, /* no transpose */
matrix3x3);
}
CoglAttribute *
cogl_attribute_new_const_4x4fv (CoglContext *context,
const char *name,
const float *matrix4x4,
CoglBool transpose)
{
return _cogl_attribute_new_const (context,
name,
4, /* n_components */
4, /* 4 column vector */
FALSE, /* no transpose */
matrix4x4);
}
CoglBool
cogl_attribute_get_normalized (CoglAttribute *attribute)
{
_COGL_RETURN_VAL_IF_FAIL (cogl_is_attribute (attribute), FALSE);
return attribute->normalized;
}
static void
warn_about_midscene_changes (void)
{
static CoglBool seen = FALSE;
if (!seen)
{
g_warning ("Mid-scene modification of attributes has "
"undefined results\n");
seen = TRUE;
}
}
void
cogl_attribute_set_normalized (CoglAttribute *attribute,
CoglBool normalized)
{
_COGL_RETURN_IF_FAIL (cogl_is_attribute (attribute));
if (G_UNLIKELY (attribute->immutable_ref))
warn_about_midscene_changes ();
attribute->normalized = normalized;
}
CoglAttributeBuffer *
cogl_attribute_get_buffer (CoglAttribute *attribute)
{
_COGL_RETURN_VAL_IF_FAIL (cogl_is_attribute (attribute), NULL);
_COGL_RETURN_VAL_IF_FAIL (attribute->is_buffered, NULL);
return attribute->d.buffered.attribute_buffer;
}
void
cogl_attribute_set_buffer (CoglAttribute *attribute,
CoglAttributeBuffer *attribute_buffer)
{
_COGL_RETURN_IF_FAIL (cogl_is_attribute (attribute));
_COGL_RETURN_IF_FAIL (attribute->is_buffered);
if (G_UNLIKELY (attribute->immutable_ref))
warn_about_midscene_changes ();
cogl_object_ref (attribute_buffer);
cogl_object_unref (attribute->d.buffered.attribute_buffer);
attribute->d.buffered.attribute_buffer = attribute_buffer;
}
CoglAttribute *
_cogl_attribute_immutable_ref (CoglAttribute *attribute)
{
CoglBuffer *buffer = COGL_BUFFER (attribute->d.buffered.attribute_buffer);
_COGL_RETURN_VAL_IF_FAIL (cogl_is_attribute (attribute), NULL);
attribute->immutable_ref++;
_cogl_buffer_immutable_ref (buffer);
return attribute;
}
void
_cogl_attribute_immutable_unref (CoglAttribute *attribute)
{
CoglBuffer *buffer = COGL_BUFFER (attribute->d.buffered.attribute_buffer);
_COGL_RETURN_IF_FAIL (cogl_is_attribute (attribute));
_COGL_RETURN_IF_FAIL (attribute->immutable_ref > 0);
attribute->immutable_ref--;
_cogl_buffer_immutable_unref (buffer);
}
static void
_cogl_attribute_free (CoglAttribute *attribute)
{
if (attribute->is_buffered)
cogl_object_unref (attribute->d.buffered.attribute_buffer);
else
_cogl_boxed_value_destroy (&attribute->d.constant.boxed);
g_slice_free (CoglAttribute, attribute);
}
static CoglBool
validate_layer_cb (CoglPipeline *pipeline,
int layer_index,
void *user_data)
{
CoglTexture *texture =
cogl_pipeline_get_layer_texture (pipeline, layer_index);
CoglFlushLayerState *state = user_data;
CoglBool status = TRUE;
/* invalid textures will be handled correctly in
* _cogl_pipeline_flush_layers_gl_state */
if (texture == NULL)
goto validated;
_cogl_texture_flush_journal_rendering (texture);
/* Give the texture a chance to know that we're rendering
non-quad shaped primitives. If the texture is in an atlas it
will be migrated */
_cogl_texture_ensure_non_quad_rendering (texture);
/* We need to ensure the mipmaps are ready before deciding
* anything else about the texture because the texture storate
* could completely change if it needs to be migrated out of the
* atlas and will affect how we validate the layer.
*/
_cogl_pipeline_pre_paint_for_layer (pipeline, layer_index);
if (!_cogl_texture_can_hardware_repeat (texture))
{
g_warning ("Disabling layer %d of the current source material, "
"because texturing with the vertex buffer API is not "
"currently supported using sliced textures, or textures "
"with waste\n", layer_index);
/* XXX: maybe we can add a mechanism for users to forcibly use
* textures with waste where it would be their responsability to use
* texture coords in the range [0,1] such that sampling outside isn't
* required. We can then use a texture matrix (or a modification of
* the users own matrix) to map 1 to the edge of the texture data.
*
* Potentially, given the same guarantee as above we could also
* support a single sliced layer too. We would have to redraw the
* vertices once for each layer, each time with a fiddled texture
* matrix.
*/
state->fallback_layers |= (1 << state->unit);
state->options.flags |= COGL_PIPELINE_FLUSH_FALLBACK_MASK;
}
validated:
state->unit++;
return status;
}
void
_cogl_flush_attributes_state (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
CoglDrawFlags flags,
CoglAttribute **attributes,
int n_attributes)
{
CoglContext *ctx = framebuffer->context;
CoglFlushLayerState layers_state;
CoglPipeline *copy = NULL;
if (!(flags & COGL_DRAW_SKIP_JOURNAL_FLUSH))
_cogl_journal_flush (framebuffer->journal);
layers_state.unit = 0;
layers_state.options.flags = 0;
layers_state.fallback_layers = 0;
if (!(flags & COGL_DRAW_SKIP_PIPELINE_VALIDATION))
cogl_pipeline_foreach_layer (pipeline,
validate_layer_cb,
&layers_state);
/* NB: _cogl_framebuffer_flush_state may disrupt various state (such
* as the pipeline state) when flushing the clip stack, so should
* always be done first when preparing to draw. We need to do this
* before setting up the array pointers because setting up the clip
* stack can cause some drawing which would change the array
* pointers. */
if (!(flags & COGL_DRAW_SKIP_FRAMEBUFFER_FLUSH))
_cogl_framebuffer_flush_state (framebuffer,
framebuffer,
COGL_FRAMEBUFFER_STATE_ALL);
/* In cogl_read_pixels we have a fast-path when reading a single
* pixel and the scene is just comprised of simple rectangles still
* in the journal. For this optimization to work we need to track
* when the framebuffer really does get drawn to. */
_cogl_framebuffer_mark_mid_scene (framebuffer);
_cogl_framebuffer_mark_clear_clip_dirty (framebuffer);
if (G_UNLIKELY (!(flags & COGL_DRAW_SKIP_LEGACY_STATE)) &&
G_UNLIKELY (ctx->legacy_state_set) &&
_cogl_get_enable_legacy_state ())
{
copy = cogl_pipeline_copy (pipeline);
pipeline = copy;
_cogl_pipeline_apply_legacy_state (pipeline);
}
ctx->driver_vtable->flush_attributes_state (framebuffer,
pipeline,
&layers_state,
flags,
attributes,
n_attributes);
if (copy)
cogl_object_unref (copy);
}
int
_cogl_attribute_get_n_components (CoglAttribute *attribute)
{
if (attribute->is_buffered)
return attribute->d.buffered.n_components;
else
return attribute->d.constant.boxed.size;
}
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