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mutter/cogl/driver/gl/cogl-attribute-gl.c
Robert Bragg f53fb5e2e0 Allow propogation of OOM errors to apps 
This allows apps to catch out-of-memory errors when allocating textures.

Textures can be pretty huge at times and so it's quite possible for an
application to try and allocate more memory than is available. It's also
very possible that the application can take some action in response to
reduce memory pressure (such as freeing up texture caches perhaps) so
we shouldn't just automatically abort like we do for trivial heap
allocations.

These public functions now take a CoglError argument so applications can
catch out of memory errors:

cogl_buffer_map
cogl_buffer_map_range
cogl_buffer_set_data
cogl_framebuffer_read_pixels_into_bitmap
cogl_pixel_buffer_new
cogl_texture_new_from_data
cogl_texture_new_from_bitmap

Note: we've been quite conservative with how many apis we let throw OOM
CoglErrors since we don't really want to put a burdon on developers to
be checking for errors with every cogl api call. So long as there is
some lower level api for apps to use that let them catch OOM errors
for everything necessary that's enough and we don't have to make more
convenient apis more awkward to use.

The main focus is on bitmaps and texture allocations since they
can be particularly large and prone to failing.

A new cogl_attribute_buffer_new_with_size() function has been added in
case developers need to catch OOM errors when allocating attribute buffers
whereby they can first use _buffer_new_with_size() (which doesn't take a
CoglError) followed by cogl_buffer_set_data() which will lazily allocate
the buffer storage and report OOM errors.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit f7735e141ad537a253b02afa2a8238f96340b978)

Note: since we can't break the API for Cogl 1.x then actually the main
purpose of cherry picking this patch is to keep in-line with changes
on the master branch so that we can easily cherry-pick patches.

All the api changes relating stable apis released on the 1.12 branch
have been reverted as part of cherry-picking this patch so this most
just applies all the internal plumbing changes that enable us to
correctly propagate OOM errors.
2013-01-22 17:48:07 +00:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010,2011,2012 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "cogl-private.h"
#include "cogl-pipeline-opengl-private.h"
#include "cogl-error-private.h"
#include "cogl-context-private.h"
#include "cogl-attribute.h"
#include "cogl-attribute-private.h"
#include "cogl-attribute-gl-private.h"
#include "cogl-pipeline-progend-glsl-private.h"
#include "cogl-buffer-gl-private.h"
typedef struct _ForeachChangedBitState
{
CoglContext *context;
const CoglBitmask *new_bits;
CoglPipeline *pipeline;
} ForeachChangedBitState;
static CoglBool
toggle_builtin_attribute_enabled_cb (int bit_num, void *user_data)
{
ForeachChangedBitState *state = user_data;
CoglContext *context = state->context;
_COGL_RETURN_VAL_IF_FAIL ((context->private_feature_flags &
COGL_PRIVATE_FEATURE_FIXED_FUNCTION),
FALSE);
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES)
{
CoglBool enabled = _cogl_bitmask_get (state->new_bits, bit_num);
GLenum cap;
switch (bit_num)
{
case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
cap = GL_COLOR_ARRAY;
break;
case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
cap = GL_VERTEX_ARRAY;
break;
case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
cap = GL_NORMAL_ARRAY;
break;
}
if (enabled)
GE (context, glEnableClientState (cap));
else
GE (context, glDisableClientState (cap));
}
#endif
return TRUE;
}
static CoglBool
toggle_texcood_attribute_enabled_cb (int bit_num, void *user_data)
{
ForeachChangedBitState *state = user_data;
CoglContext *context = state->context;
_COGL_RETURN_VAL_IF_FAIL ((context->private_feature_flags &
COGL_PRIVATE_FEATURE_FIXED_FUNCTION),
FALSE);
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES)
{
CoglBool enabled = _cogl_bitmask_get (state->new_bits, bit_num);
GE( context, glClientActiveTexture (GL_TEXTURE0 + bit_num) );
if (enabled)
GE( context, glEnableClientState (GL_TEXTURE_COORD_ARRAY) );
else
GE( context, glDisableClientState (GL_TEXTURE_COORD_ARRAY) );
}
#endif
return TRUE;
}
static CoglBool
toggle_custom_attribute_enabled_cb (int bit_num, void *user_data)
{
ForeachChangedBitState *state = user_data;
CoglBool enabled = _cogl_bitmask_get (state->new_bits, bit_num);
CoglContext *context = state->context;
if (enabled)
GE( context, glEnableVertexAttribArray (bit_num) );
else
GE( context, glDisableVertexAttribArray (bit_num) );
return TRUE;
}
static void
foreach_changed_bit_and_save (CoglContext *context,
CoglBitmask *current_bits,
const CoglBitmask *new_bits,
CoglBitmaskForeachFunc callback,
ForeachChangedBitState *state)
{
/* Get the list of bits that are different */
_cogl_bitmask_clear_all (&context->changed_bits_tmp);
_cogl_bitmask_set_bits (&context->changed_bits_tmp, current_bits);
_cogl_bitmask_xor_bits (&context->changed_bits_tmp, new_bits);
/* Iterate over each bit to change */
state->new_bits = new_bits;
_cogl_bitmask_foreach (&context->changed_bits_tmp,
callback,
state);
/* Store the new values */
_cogl_bitmask_clear_all (current_bits);
_cogl_bitmask_set_bits (current_bits, new_bits);
}
#ifdef COGL_PIPELINE_PROGEND_GLSL
static void
setup_generic_buffered_attribute (CoglContext *context,
CoglPipeline *pipeline,
CoglAttribute *attribute,
uint8_t *base)
{
int name_index = attribute->name_state->name_index;
int attrib_location =
_cogl_pipeline_progend_glsl_get_attrib_location (pipeline, name_index);
if (attrib_location == -1)
return;
GE( context, glVertexAttribPointer (attrib_location,
attribute->d.buffered.n_components,
attribute->d.buffered.type,
attribute->normalized,
attribute->d.buffered.stride,
base + attribute->d.buffered.offset) );
_cogl_bitmask_set (&context->enable_custom_attributes_tmp,
attrib_location, TRUE);
}
static void
setup_generic_const_attribute (CoglContext *context,
CoglPipeline *pipeline,
CoglAttribute *attribute)
{
int name_index = attribute->name_state->name_index;
int attrib_location =
_cogl_pipeline_progend_glsl_get_attrib_location (pipeline, name_index);
int columns;
int i;
if (attrib_location == -1)
return;
if (attribute->d.constant.boxed.type == COGL_BOXED_MATRIX)
columns = attribute->d.constant.boxed.size;
else
columns = 1;
/* Note: it's ok to access a COGL_BOXED_FLOAT as a matrix with only
* one column... */
switch (attribute->d.constant.boxed.size)
{
case 1:
GE( context, glVertexAttrib1fv (attrib_location,
attribute->d.constant.boxed.v.matrix));
break;
case 2:
for (i = 0; i < columns; i++)
GE( context, glVertexAttrib2fv (attrib_location + i,
attribute->d.constant.boxed.v.matrix));
break;
case 3:
for (i = 0; i < columns; i++)
GE( context, glVertexAttrib3fv (attrib_location + i,
attribute->d.constant.boxed.v.matrix));
break;
case 4:
for (i = 0; i < columns; i++)
GE( context, glVertexAttrib4fv (attrib_location + i,
attribute->d.constant.boxed.v.matrix));
break;
default:
g_warn_if_reached ();
}
}
#endif /* COGL_PIPELINE_PROGEND_GLSL */
static void
setup_legacy_buffered_attribute (CoglContext *ctx,
CoglPipeline *pipeline,
CoglAttribute *attribute,
uint8_t *base)
{
switch (attribute->name_state->name_id)
{
case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
_cogl_bitmask_set (&ctx->enable_builtin_attributes_tmp,
COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY, TRUE);
GE (ctx, glColorPointer (attribute->d.buffered.n_components,
attribute->d.buffered.type,
attribute->d.buffered.stride,
base + attribute->d.buffered.offset));
break;
case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
_cogl_bitmask_set (&ctx->enable_builtin_attributes_tmp,
COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY, TRUE);
GE (ctx, glNormalPointer (attribute->d.buffered.type,
attribute->d.buffered.stride,
base + attribute->d.buffered.offset));
break;
case COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY:
{
int layer_number = attribute->name_state->layer_number;
CoglPipelineLayer *layer =
_cogl_pipeline_get_layer (pipeline, layer_number);
int unit = _cogl_pipeline_layer_get_unit_index (layer);
_cogl_bitmask_set (&ctx->enable_texcoord_attributes_tmp, unit, TRUE);
GE (ctx, glClientActiveTexture (GL_TEXTURE0 + unit));
GE (ctx, glTexCoordPointer (attribute->d.buffered.n_components,
attribute->d.buffered.type,
attribute->d.buffered.stride,
base + attribute->d.buffered.offset));
break;
}
case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
_cogl_bitmask_set (&ctx->enable_builtin_attributes_tmp,
COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY, TRUE);
GE (ctx, glVertexPointer (attribute->d.buffered.n_components,
attribute->d.buffered.type,
attribute->d.buffered.stride,
base + attribute->d.buffered.offset));
break;
case COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY:
#ifdef COGL_PIPELINE_PROGEND_GLSL
if (ctx->driver != COGL_DRIVER_GLES1)
setup_generic_buffered_attribute (ctx, pipeline, attribute, base);
#endif
break;
default:
g_warn_if_reached ();
}
}
static void
setup_legacy_const_attribute (CoglContext *ctx,
CoglPipeline *pipeline,
CoglAttribute *attribute)
{
#ifdef COGL_PIPELINE_PROGEND_GLSL
if (attribute->name_state->name_id == COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY)
{
if (ctx->driver != COGL_DRIVER_GLES1)
setup_generic_const_attribute (ctx, pipeline, attribute);
}
else
#endif
{
float vector[4] = { 0, 0, 0, 1 };
float *boxed = attribute->d.constant.boxed.v.float_value;
int n_components = attribute->d.constant.boxed.size;
int i;
for (i = 0; i < n_components; i++)
vector[i] = boxed[i];
switch (attribute->name_state->name_id)
{
case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
GE (ctx, glColor4f (vector[0], vector[1], vector[2], vector[3]));
break;
case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
GE (ctx, glNormal3f (vector[0], vector[1], vector[2]));
break;
case COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY:
{
int layer_number = attribute->name_state->layer_number;
CoglPipelineLayer *layer =
_cogl_pipeline_get_layer (pipeline, layer_number);
int unit = _cogl_pipeline_layer_get_unit_index (layer);
GE (ctx, glClientActiveTexture (GL_TEXTURE0 + unit));
GE (ctx, glMultiTexCoord4f (vector[0], vector[1], vector[2], vector[3]));
break;
}
case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
GE (ctx, glVertex4f (vector[0], vector[1], vector[2], vector[3]));
break;
default:
g_warn_if_reached ();
}
}
}
static void
apply_attribute_enable_updates (CoglContext *context,
CoglPipeline *pipeline)
{
ForeachChangedBitState changed_bits_state;
changed_bits_state.context = context;
changed_bits_state.new_bits = &context->enable_builtin_attributes_tmp;
changed_bits_state.pipeline = pipeline;
foreach_changed_bit_and_save (context,
&context->enabled_builtin_attributes,
&context->enable_builtin_attributes_tmp,
toggle_builtin_attribute_enabled_cb,
&changed_bits_state);
changed_bits_state.new_bits = &context->enable_texcoord_attributes_tmp;
foreach_changed_bit_and_save (context,
&context->enabled_texcoord_attributes,
&context->enable_texcoord_attributes_tmp,
toggle_texcood_attribute_enabled_cb,
&changed_bits_state);
changed_bits_state.new_bits = &context->enable_custom_attributes_tmp;
foreach_changed_bit_and_save (context,
&context->enabled_custom_attributes,
&context->enable_custom_attributes_tmp,
toggle_custom_attribute_enabled_cb,
&changed_bits_state);
}
void
_cogl_gl_flush_attributes_state (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
CoglFlushLayerState *layers_state,
CoglDrawFlags flags,
CoglAttribute **attributes,
int n_attributes)
{
CoglContext *ctx = framebuffer->context;
int i;
CoglBool skip_gl_color = FALSE;
CoglPipeline *copy = NULL;
/* Iterate the attributes to work out whether blending needs to be
enabled and how many texture coords there are. We need to do this
before flushing the pipeline. */
for (i = 0; i < n_attributes; i++)
switch (attributes[i]->name_state->name_id)
{
case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
if ((flags & COGL_DRAW_COLOR_ATTRIBUTE_IS_OPAQUE) == 0 &&
!_cogl_pipeline_get_real_blend_enabled (pipeline))
{
CoglPipelineBlendEnable blend_enable =
COGL_PIPELINE_BLEND_ENABLE_ENABLED;
copy = cogl_pipeline_copy (pipeline);
_cogl_pipeline_set_blend_enabled (copy, blend_enable);
pipeline = copy;
}
skip_gl_color = TRUE;
break;
default:
break;
}
if (G_UNLIKELY (layers_state->options.flags))
{
/* If we haven't already created a derived pipeline... */
if (!copy)
{
copy = cogl_pipeline_copy (pipeline);
pipeline = copy;
}
_cogl_pipeline_apply_overrides (pipeline, &layers_state->options);
/* TODO:
* overrides = cogl_pipeline_get_data (pipeline,
* last_overrides_key);
* if (overrides)
* {
* age = cogl_pipeline_get_age (pipeline);
* XXX: actually we also need to check for legacy_state
* and blending overrides for use of glColorPointer...
* if (overrides->ags != age ||
* memcmp (&overrides->options, &options,
* sizeof (options) != 0)
* {
* cogl_object_unref (overrides->weak_pipeline);
* g_slice_free (Overrides, overrides);
* overrides = NULL;
* }
* }
* if (!overrides)
* {
* overrides = g_slice_new (Overrides);
* overrides->weak_pipeline =
* cogl_pipeline_weak_copy (pipeline);
* _cogl_pipeline_apply_overrides (overrides->weak_pipeline,
* &options);
*
* cogl_pipeline_set_data (pipeline, last_overrides_key,
* weak_overrides,
* free_overrides_cb,
* NULL);
* }
* pipeline = overrides->weak_pipeline;
*/
}
_cogl_pipeline_flush_gl_state (pipeline,
framebuffer,
skip_gl_color);
_cogl_bitmask_clear_all (&ctx->enable_builtin_attributes_tmp);
_cogl_bitmask_clear_all (&ctx->enable_texcoord_attributes_tmp);
_cogl_bitmask_clear_all (&ctx->enable_custom_attributes_tmp);
/* Bind the attribute pointers. We need to do this after the
* pipeline is flushed because when using GLSL that is the only
* point when we can determine the attribute locations */
for (i = 0; i < n_attributes; i++)
{
CoglAttribute *attribute = attributes[i];
CoglAttributeBuffer *attribute_buffer;
CoglBuffer *buffer;
uint8_t *base;
if (attribute->is_buffered)
{
attribute_buffer = cogl_attribute_get_buffer (attribute);
buffer = COGL_BUFFER (attribute_buffer);
/* Note: we don't try and catch errors with binding buffers
* here since OOM errors at this point indicate that nothing
* has yet been uploaded to attribute buffer which we
* consider to be a programmer error.
*/
base =
_cogl_buffer_gl_bind (buffer,
COGL_BUFFER_BIND_TARGET_ATTRIBUTE_BUFFER,
NULL);
if (pipeline->progend == COGL_PIPELINE_PROGEND_GLSL)
setup_generic_buffered_attribute (ctx, pipeline, attribute, base);
else
setup_legacy_buffered_attribute (ctx, pipeline, attribute, base);
_cogl_buffer_gl_unbind (buffer);
}
else
{
if (pipeline->progend == COGL_PIPELINE_PROGEND_GLSL)
setup_generic_const_attribute (ctx, pipeline, attribute);
else
setup_legacy_const_attribute (ctx, pipeline, attribute);
}
}
apply_attribute_enable_updates (ctx, pipeline);
if (copy)
cogl_object_unref (copy);
}
void
_cogl_gl_disable_all_attributes (CoglContext *ctx)
{
_cogl_bitmask_clear_all (&ctx->enable_builtin_attributes_tmp);
_cogl_bitmask_clear_all (&ctx->enable_texcoord_attributes_tmp);
_cogl_bitmask_clear_all (&ctx->enable_custom_attributes_tmp);
/* XXX: we can pass a NULL source pipeline here because we know a
* source pipeline only needs to be referenced when enabling
* attributes. */
apply_attribute_enable_updates (ctx, NULL);
}
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