a0441778ad
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.
This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html
Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)
For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10 0bbf50f905..HEAD
We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html
Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January
As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.
This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
540 lines
18 KiB
C
540 lines
18 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2010,2011,2012 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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 (_cogl_has_private_feature
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(context, 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 (_cogl_has_private_feature
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(context, 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 (_cogl_has_private_feature (ctx, 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 (_cogl_has_private_feature (ctx, 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);
|
|
_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);
|
|
}
|