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https://github.com/brl/mutter.git
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8f9151303d
Since _cogl_pipeline_update_blend_enable() can sometimes show up quite high in profiles; instead of calling _cogl_pipeline_update_blend_enable() whenever we change pipeline state that may affect blending we now just set a dirty flag and when we flush a pipeline we check this dirty flag and lazily calculate whether blender really needs to be enabled if it's set. Since it turns out we were too optimistic in assuming most GL drivers would recognize blending with ADD(src,0) is equivalent to disabling GL_BLEND we now check this case ourselves so we can always explicitly disable GL_BLEND if we know we don't need blending. This introduces the idea of an 'unknown_color_alpha' boolean to the pipeline flush code which is set whenever we can't guarantee that the color attribute is opaque. For example this is set whenever a user specifies a color attribute with 4 components when drawing a primitive. This boolean needs to be cached along with every pipeline because pipeline::real_blend_enabled depends on this and so we need to also call _cogl_pipeline_update_blend_enable() if the status of this changes. Incidentally with this patch we now no longer ever use _cogl_pipeline_set_blend_enable() internally. For now the internal api hasn't been removed though since we might want to consider re-purposing it as a public api since it will now not conflict with our own internal state tracking and could provide a more convenient way to disable blending than setting a blend string. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit ab2ae18f3207514c91fa6fd9f2d3f2ed93a86497)
514 lines
17 KiB
C
514 lines
17 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2010,2011,2012 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "cogl-private.h"
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#include "cogl-util-gl-private.h"
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#include "cogl-pipeline-opengl-private.h"
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#include "cogl-error-private.h"
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#include "cogl-context-private.h"
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#include "cogl-attribute.h"
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#include "cogl-attribute-private.h"
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#include "cogl-attribute-gl-private.h"
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#include "cogl-pipeline-progend-glsl-private.h"
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#include "cogl-buffer-gl-private.h"
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typedef struct _ForeachChangedBitState
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{
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CoglContext *context;
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const CoglBitmask *new_bits;
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CoglPipeline *pipeline;
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} ForeachChangedBitState;
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static CoglBool
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toggle_builtin_attribute_enabled_cb (int bit_num, void *user_data)
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{
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ForeachChangedBitState *state = user_data;
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CoglContext *context = state->context;
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_COGL_RETURN_VAL_IF_FAIL ((context->private_feature_flags &
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COGL_PRIVATE_FEATURE_FIXED_FUNCTION),
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FALSE);
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#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES)
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{
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CoglBool enabled = _cogl_bitmask_get (state->new_bits, bit_num);
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GLenum cap;
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switch (bit_num)
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{
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case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
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cap = GL_COLOR_ARRAY;
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break;
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case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
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cap = GL_VERTEX_ARRAY;
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break;
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case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
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cap = GL_NORMAL_ARRAY;
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break;
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}
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if (enabled)
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GE (context, glEnableClientState (cap));
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else
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GE (context, glDisableClientState (cap));
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}
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#endif
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return TRUE;
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}
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static CoglBool
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toggle_texcood_attribute_enabled_cb (int bit_num, void *user_data)
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{
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ForeachChangedBitState *state = user_data;
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CoglContext *context = state->context;
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_COGL_RETURN_VAL_IF_FAIL ((context->private_feature_flags &
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COGL_PRIVATE_FEATURE_FIXED_FUNCTION),
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FALSE);
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#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES)
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{
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CoglBool enabled = _cogl_bitmask_get (state->new_bits, bit_num);
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GE( context, glClientActiveTexture (GL_TEXTURE0 + bit_num) );
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if (enabled)
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GE( context, glEnableClientState (GL_TEXTURE_COORD_ARRAY) );
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else
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GE( context, glDisableClientState (GL_TEXTURE_COORD_ARRAY) );
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}
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#endif
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return TRUE;
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}
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static CoglBool
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toggle_custom_attribute_enabled_cb (int bit_num, void *user_data)
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{
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ForeachChangedBitState *state = user_data;
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CoglBool enabled = _cogl_bitmask_get (state->new_bits, bit_num);
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CoglContext *context = state->context;
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if (enabled)
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GE( context, glEnableVertexAttribArray (bit_num) );
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else
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GE( context, glDisableVertexAttribArray (bit_num) );
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return TRUE;
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}
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static void
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foreach_changed_bit_and_save (CoglContext *context,
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CoglBitmask *current_bits,
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const CoglBitmask *new_bits,
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CoglBitmaskForeachFunc callback,
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ForeachChangedBitState *state)
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{
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/* Get the list of bits that are different */
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_cogl_bitmask_clear_all (&context->changed_bits_tmp);
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_cogl_bitmask_set_bits (&context->changed_bits_tmp, current_bits);
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_cogl_bitmask_xor_bits (&context->changed_bits_tmp, new_bits);
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/* Iterate over each bit to change */
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state->new_bits = new_bits;
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_cogl_bitmask_foreach (&context->changed_bits_tmp,
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callback,
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state);
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/* Store the new values */
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_cogl_bitmask_clear_all (current_bits);
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_cogl_bitmask_set_bits (current_bits, new_bits);
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}
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#ifdef COGL_PIPELINE_PROGEND_GLSL
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static void
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setup_generic_buffered_attribute (CoglContext *context,
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CoglPipeline *pipeline,
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CoglAttribute *attribute,
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uint8_t *base)
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{
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int name_index = attribute->name_state->name_index;
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int attrib_location =
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_cogl_pipeline_progend_glsl_get_attrib_location (pipeline, name_index);
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if (attrib_location == -1)
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return;
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GE( context, glVertexAttribPointer (attrib_location,
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attribute->d.buffered.n_components,
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attribute->d.buffered.type,
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attribute->normalized,
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attribute->d.buffered.stride,
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base + attribute->d.buffered.offset) );
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_cogl_bitmask_set (&context->enable_custom_attributes_tmp,
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attrib_location, TRUE);
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}
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static void
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setup_generic_const_attribute (CoglContext *context,
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CoglPipeline *pipeline,
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CoglAttribute *attribute)
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{
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int name_index = attribute->name_state->name_index;
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int attrib_location =
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_cogl_pipeline_progend_glsl_get_attrib_location (pipeline, name_index);
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int columns;
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int i;
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if (attrib_location == -1)
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return;
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if (attribute->d.constant.boxed.type == COGL_BOXED_MATRIX)
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columns = attribute->d.constant.boxed.size;
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else
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columns = 1;
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/* Note: it's ok to access a COGL_BOXED_FLOAT as a matrix with only
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* one column... */
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switch (attribute->d.constant.boxed.size)
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{
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case 1:
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GE( context, glVertexAttrib1fv (attrib_location,
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attribute->d.constant.boxed.v.matrix));
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break;
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case 2:
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for (i = 0; i < columns; i++)
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GE( context, glVertexAttrib2fv (attrib_location + i,
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attribute->d.constant.boxed.v.matrix));
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break;
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case 3:
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for (i = 0; i < columns; i++)
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GE( context, glVertexAttrib3fv (attrib_location + i,
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attribute->d.constant.boxed.v.matrix));
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break;
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case 4:
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for (i = 0; i < columns; i++)
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GE( context, glVertexAttrib4fv (attrib_location + i,
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attribute->d.constant.boxed.v.matrix));
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break;
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default:
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g_warn_if_reached ();
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}
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}
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#endif /* COGL_PIPELINE_PROGEND_GLSL */
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static void
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setup_legacy_buffered_attribute (CoglContext *ctx,
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CoglPipeline *pipeline,
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CoglAttribute *attribute,
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uint8_t *base)
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{
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switch (attribute->name_state->name_id)
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{
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case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
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_cogl_bitmask_set (&ctx->enable_builtin_attributes_tmp,
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COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY, TRUE);
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GE (ctx, glColorPointer (attribute->d.buffered.n_components,
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attribute->d.buffered.type,
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attribute->d.buffered.stride,
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base + attribute->d.buffered.offset));
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break;
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case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
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_cogl_bitmask_set (&ctx->enable_builtin_attributes_tmp,
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COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY, TRUE);
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GE (ctx, glNormalPointer (attribute->d.buffered.type,
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attribute->d.buffered.stride,
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base + attribute->d.buffered.offset));
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break;
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case COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY:
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{
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int layer_number = attribute->name_state->layer_number;
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CoglPipelineLayer *layer =
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_cogl_pipeline_get_layer (pipeline, layer_number);
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int unit = _cogl_pipeline_layer_get_unit_index (layer);
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_cogl_bitmask_set (&ctx->enable_texcoord_attributes_tmp, unit, TRUE);
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GE (ctx, glClientActiveTexture (GL_TEXTURE0 + unit));
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GE (ctx, glTexCoordPointer (attribute->d.buffered.n_components,
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attribute->d.buffered.type,
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attribute->d.buffered.stride,
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base + attribute->d.buffered.offset));
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break;
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}
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case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
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_cogl_bitmask_set (&ctx->enable_builtin_attributes_tmp,
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COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY, TRUE);
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GE (ctx, glVertexPointer (attribute->d.buffered.n_components,
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attribute->d.buffered.type,
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attribute->d.buffered.stride,
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base + attribute->d.buffered.offset));
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break;
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case COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY:
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#ifdef COGL_PIPELINE_PROGEND_GLSL
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if (ctx->driver != COGL_DRIVER_GLES1)
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setup_generic_buffered_attribute (ctx, pipeline, attribute, base);
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#endif
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break;
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default:
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g_warn_if_reached ();
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}
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}
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static void
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setup_legacy_const_attribute (CoglContext *ctx,
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CoglPipeline *pipeline,
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CoglAttribute *attribute)
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{
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#ifdef COGL_PIPELINE_PROGEND_GLSL
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if (attribute->name_state->name_id == COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY)
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{
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if (ctx->driver != COGL_DRIVER_GLES1)
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setup_generic_const_attribute (ctx, pipeline, attribute);
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}
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else
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#endif
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{
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float vector[4] = { 0, 0, 0, 1 };
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float *boxed = attribute->d.constant.boxed.v.float_value;
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int n_components = attribute->d.constant.boxed.size;
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int i;
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for (i = 0; i < n_components; i++)
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vector[i] = boxed[i];
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switch (attribute->name_state->name_id)
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{
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case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
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GE (ctx, glColor4f (vector[0], vector[1], vector[2], vector[3]));
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break;
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case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
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GE (ctx, glNormal3f (vector[0], vector[1], vector[2]));
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break;
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case COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY:
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{
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int layer_number = attribute->name_state->layer_number;
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CoglPipelineLayer *layer =
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_cogl_pipeline_get_layer (pipeline, layer_number);
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int unit = _cogl_pipeline_layer_get_unit_index (layer);
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GE (ctx, glClientActiveTexture (GL_TEXTURE0 + unit));
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GE (ctx, glMultiTexCoord4f (vector[0], vector[1], vector[2], vector[3]));
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break;
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}
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case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
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GE (ctx, glVertex4f (vector[0], vector[1], vector[2], vector[3]));
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break;
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default:
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g_warn_if_reached ();
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}
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}
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}
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static void
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apply_attribute_enable_updates (CoglContext *context,
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CoglPipeline *pipeline)
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{
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ForeachChangedBitState changed_bits_state;
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changed_bits_state.context = context;
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changed_bits_state.new_bits = &context->enable_builtin_attributes_tmp;
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changed_bits_state.pipeline = pipeline;
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foreach_changed_bit_and_save (context,
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&context->enabled_builtin_attributes,
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&context->enable_builtin_attributes_tmp,
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toggle_builtin_attribute_enabled_cb,
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&changed_bits_state);
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changed_bits_state.new_bits = &context->enable_texcoord_attributes_tmp;
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foreach_changed_bit_and_save (context,
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&context->enabled_texcoord_attributes,
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&context->enable_texcoord_attributes_tmp,
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toggle_texcood_attribute_enabled_cb,
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&changed_bits_state);
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changed_bits_state.new_bits = &context->enable_custom_attributes_tmp;
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foreach_changed_bit_and_save (context,
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&context->enabled_custom_attributes,
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&context->enable_custom_attributes_tmp,
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toggle_custom_attribute_enabled_cb,
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&changed_bits_state);
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}
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void
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_cogl_gl_flush_attributes_state (CoglFramebuffer *framebuffer,
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CoglPipeline *pipeline,
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CoglFlushLayerState *layers_state,
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CoglDrawFlags flags,
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CoglAttribute **attributes,
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int n_attributes)
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{
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CoglContext *ctx = framebuffer->context;
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int i;
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CoglBool with_color_attrib = FALSE;
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CoglBool unknown_color_alpha = FALSE;
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CoglPipeline *copy = NULL;
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/* Iterate the attributes to see if we have a color attribute which
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* may affect our decision to enable blending or not.
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*
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* We need to do this before flushing the pipeline. */
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for (i = 0; i < n_attributes; i++)
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switch (attributes[i]->name_state->name_id)
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{
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case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
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if ((flags & COGL_DRAW_COLOR_ATTRIBUTE_IS_OPAQUE) == 0 &&
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_cogl_attribute_get_n_components (attributes[i]) == 4)
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unknown_color_alpha = TRUE;
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with_color_attrib = TRUE;
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break;
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default:
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break;
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}
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if (G_UNLIKELY (layers_state->options.flags))
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{
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/* If we haven't already created a derived pipeline... */
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if (!copy)
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{
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copy = cogl_pipeline_copy (pipeline);
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pipeline = copy;
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}
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_cogl_pipeline_apply_overrides (pipeline, &layers_state->options);
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/* TODO:
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* overrides = cogl_pipeline_get_data (pipeline,
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* last_overrides_key);
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* if (overrides)
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* {
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* age = cogl_pipeline_get_age (pipeline);
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* XXX: actually we also need to check for legacy_state
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* and blending overrides for use of glColorPointer...
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* if (overrides->ags != age ||
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* memcmp (&overrides->options, &options,
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* sizeof (options) != 0)
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* {
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* cogl_object_unref (overrides->weak_pipeline);
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* g_slice_free (Overrides, overrides);
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* overrides = NULL;
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* }
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* }
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* if (!overrides)
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* {
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* overrides = g_slice_new (Overrides);
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* overrides->weak_pipeline =
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* cogl_pipeline_weak_copy (pipeline);
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* _cogl_pipeline_apply_overrides (overrides->weak_pipeline,
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* &options);
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*
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* cogl_pipeline_set_data (pipeline, last_overrides_key,
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* weak_overrides,
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* free_overrides_cb,
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* NULL);
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* }
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* pipeline = overrides->weak_pipeline;
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*/
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}
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_cogl_pipeline_flush_gl_state (ctx,
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pipeline,
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framebuffer,
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with_color_attrib,
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unknown_color_alpha);
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_cogl_bitmask_clear_all (&ctx->enable_builtin_attributes_tmp);
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_cogl_bitmask_clear_all (&ctx->enable_texcoord_attributes_tmp);
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_cogl_bitmask_clear_all (&ctx->enable_custom_attributes_tmp);
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/* Bind the attribute pointers. We need to do this after the
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* pipeline is flushed because when using GLSL that is the only
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* point when we can determine the attribute locations */
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for (i = 0; i < n_attributes; i++)
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{
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CoglAttribute *attribute = attributes[i];
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CoglAttributeBuffer *attribute_buffer;
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CoglBuffer *buffer;
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uint8_t *base;
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if (attribute->is_buffered)
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{
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attribute_buffer = cogl_attribute_get_buffer (attribute);
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buffer = COGL_BUFFER (attribute_buffer);
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/* Note: we don't try and catch errors with binding buffers
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* here since OOM errors at this point indicate that nothing
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* has yet been uploaded to attribute buffer which we
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* consider to be a programmer error.
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*/
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base =
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_cogl_buffer_gl_bind (buffer,
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COGL_BUFFER_BIND_TARGET_ATTRIBUTE_BUFFER,
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NULL);
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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);
|
|
}
|