34658ea057
This adds a table of driver descriptions to cogl-renderer.c in order of preference and when choosing what driver to use we now iterate the table instead of repeating boilerplate checks. For handling the "default driver" that can be specified when building cogl and handling driver overrides there is a foreach_driver_description() that will make sure to iterate the default driver first or if an override has been set then nothing but the override will be considered. This patch introduces some driver flags that let us broadly categorize what kind of GL driver we are currently running on. Since there are numerous OpenGL apis with different broad feature sets and new apis may be introduced in the future by Khronos then we should tend to avoid using the driver id to do runtime feature checking. These flags provide a more stable quantity for broad feature checks. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e07d0fc7441dddc3f0a2bc33a6a37d62ddc3efc0)
533 lines
18 KiB
C
533 lines
18 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_GL_FIXED),
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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_GL_FIXED),
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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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const CoglPipelineGetLayerFlags flags =
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COGL_PIPELINE_GET_LAYER_NO_CREATE;
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CoglPipelineLayer *layer =
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_cogl_pipeline_get_layer_with_flags (pipeline, layer_number, flags);
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if (layer)
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{
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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,
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unit,
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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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}
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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->private_feature_flags & COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE)
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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->private_feature_flags & COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE)
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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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const CoglPipelineGetLayerFlags flags =
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COGL_PIPELINE_GET_LAYER_NO_CREATE;
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CoglPipelineLayer *layer =
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_cogl_pipeline_get_layer_with_flags (pipeline,
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layer_number,
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flags);
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if (layer)
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{
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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],
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vector[1],
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vector[2],
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vector[3]));
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}
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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,
|
|
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);
|
|
}
|