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.
433 lines
14 KiB
C
433 lines
14 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) 2008,2009,2010 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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* 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 "cogl-context-private.h"
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#include "cogl-util-gl-private.h"
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#include "cogl-pipeline-private.h"
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#include "cogl-pipeline-state-private.h"
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#include "cogl-pipeline-opengl-private.h"
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#ifdef COGL_PIPELINE_FRAGEND_FIXED
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#include "cogl-context-private.h"
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#include "cogl-object-private.h"
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#include "cogl-texture-private.h"
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#include "cogl-blend-string.h"
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#include "cogl-profile.h"
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#include "cogl-program-private.h"
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#include <glib.h>
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#include <glib/gprintf.h>
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#include <string.h>
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#ifndef GL_TEXTURE_RECTANGLE_ARB
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#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
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#endif
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const CoglPipelineFragend _cogl_pipeline_fixed_fragend;
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static void
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_cogl_disable_texture_unit (int unit_index)
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{
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CoglTextureUnit *unit;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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unit = &g_array_index (ctx->texture_units, CoglTextureUnit, unit_index);
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if (unit->enabled_gl_target)
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{
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_cogl_set_active_texture_unit (unit_index);
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GE (ctx, glDisable (unit->enabled_gl_target));
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unit->enabled_gl_target = 0;
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}
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}
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static int
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get_max_texture_units (void)
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{
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_COGL_GET_CONTEXT (ctx, 0);
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/* This function is called quite often so we cache the value to
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avoid too many GL calls */
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if (ctx->max_texture_units == -1)
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{
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ctx->max_texture_units = 1;
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GE (ctx, glGetIntegerv (GL_MAX_TEXTURE_UNITS,
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&ctx->max_texture_units));
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}
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return ctx->max_texture_units;
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}
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static void
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_cogl_pipeline_fragend_fixed_start (CoglPipeline *pipeline,
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int n_layers,
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unsigned long pipelines_difference)
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{
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_cogl_use_fragment_program (0, COGL_PIPELINE_PROGRAM_TYPE_FIXED);
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}
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static void
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translate_sources (CoglPipeline *pipeline,
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int n_sources,
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CoglPipelineCombineSource *source_in,
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GLenum *source_out)
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{
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int i;
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/* The texture source numbers specified in the layer combine are the
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layer numbers so we need to map these to unit indices */
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for (i = 0; i < n_sources; i++)
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switch (source_in[i])
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{
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case COGL_PIPELINE_COMBINE_SOURCE_TEXTURE:
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source_out[i] = GL_TEXTURE;
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break;
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case COGL_PIPELINE_COMBINE_SOURCE_CONSTANT:
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source_out[i] = GL_CONSTANT;
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break;
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case COGL_PIPELINE_COMBINE_SOURCE_PRIMARY_COLOR:
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source_out[i] = GL_PRIMARY_COLOR;
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break;
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case COGL_PIPELINE_COMBINE_SOURCE_PREVIOUS:
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source_out[i] = GL_PREVIOUS;
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break;
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default:
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{
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int layer_num = source_in[i] - COGL_PIPELINE_COMBINE_SOURCE_TEXTURE0;
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CoglPipelineGetLayerFlags flags = COGL_PIPELINE_GET_LAYER_NO_CREATE;
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CoglPipelineLayer *layer =
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_cogl_pipeline_get_layer_with_flags (pipeline, layer_num, flags);
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if (layer == NULL)
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{
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static CoglBool warning_seen = FALSE;
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if (!warning_seen)
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{
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g_warning ("The application is trying to use a texture "
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"combine with a layer number that does not exist");
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warning_seen = TRUE;
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}
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source_out[i] = GL_PREVIOUS;
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}
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else
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source_out[i] = (_cogl_pipeline_layer_get_unit_index (layer) +
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GL_TEXTURE0);
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}
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}
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}
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static CoglBool
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_cogl_pipeline_fragend_fixed_add_layer (CoglPipeline *pipeline,
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CoglPipelineLayer *layer,
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unsigned long layers_difference)
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{
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CoglTextureUnit *unit =
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_cogl_get_texture_unit (_cogl_pipeline_layer_get_unit_index (layer));
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int unit_index = unit->index;
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int n_rgb_func_args;
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int n_alpha_func_args;
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_COGL_GET_CONTEXT (ctx, FALSE);
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/* XXX: Beware that since we are changing the active texture unit we
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* must make sure we don't call into other Cogl components that may
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* temporarily bind texture objects to query/modify parameters since
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* they will end up binding texture unit 1. See
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* _cogl_bind_gl_texture_transient for more details.
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*/
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_cogl_set_active_texture_unit (unit_index);
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if (G_UNLIKELY (unit_index >= get_max_texture_units ()))
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{
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_cogl_disable_texture_unit (unit_index);
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/* TODO: although this isn't considered an error that
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* warrants falling back to a different backend we
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* should print a warning here. */
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return TRUE;
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}
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/* Handle enabling or disabling the right texture type */
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if (layers_difference & COGL_PIPELINE_LAYER_STATE_TEXTURE_TYPE)
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{
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CoglTextureType texture_type =
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_cogl_pipeline_layer_get_texture_type (layer);
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GLenum gl_target;
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switch (texture_type)
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{
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case COGL_TEXTURE_TYPE_2D:
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gl_target = GL_TEXTURE_2D;
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break;
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case COGL_TEXTURE_TYPE_3D:
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gl_target = GL_TEXTURE_3D;
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break;
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case COGL_TEXTURE_TYPE_RECTANGLE:
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gl_target = GL_TEXTURE_RECTANGLE_ARB;
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break;
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}
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_cogl_set_active_texture_unit (unit_index);
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/* The common GL code handles binding the right texture so we
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just need to handle enabling and disabling it */
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if (unit->enabled_gl_target != gl_target)
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{
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/* Disable the previous target if it's still enabled */
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if (unit->enabled_gl_target)
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GE (ctx, glDisable (unit->enabled_gl_target));
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/* Enable the new target */
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if (!G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_TEXTURING)))
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{
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GE (ctx, glEnable (gl_target));
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unit->enabled_gl_target = gl_target;
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}
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}
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}
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else
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{
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/* Even though there may be no difference between the last flushed
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* texture state and the current layers texture state it may be that the
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* texture unit has been disabled for some time so we need to assert that
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* it's enabled now.
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*/
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if (!G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_TEXTURING)) &&
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unit->enabled_gl_target == 0)
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{
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_cogl_set_active_texture_unit (unit_index);
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GE (ctx, glEnable (unit->gl_target));
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unit->enabled_gl_target = unit->gl_target;
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}
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}
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if (layers_difference & COGL_PIPELINE_LAYER_STATE_COMBINE)
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{
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CoglPipelineLayer *authority =
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_cogl_pipeline_layer_get_authority (layer,
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COGL_PIPELINE_LAYER_STATE_COMBINE);
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CoglPipelineLayerBigState *big_state = authority->big_state;
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GLenum sources[3];
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE));
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/* Set the combiner functions... */
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV,
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GL_COMBINE_RGB,
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big_state->texture_combine_rgb_func));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV,
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GL_COMBINE_ALPHA,
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big_state->texture_combine_alpha_func));
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/*
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* Setup the function arguments...
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*/
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/* For the RGB components... */
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n_rgb_func_args =
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_cogl_get_n_args_for_combine_func (big_state->texture_combine_rgb_func);
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translate_sources (pipeline,
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n_rgb_func_args,
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big_state->texture_combine_rgb_src,
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sources);
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_RGB,
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sources[0]));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_RGB,
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big_state->texture_combine_rgb_op[0]));
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if (n_rgb_func_args > 1)
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{
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_RGB,
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sources[1]));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_RGB,
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big_state->texture_combine_rgb_op[1]));
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}
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if (n_rgb_func_args > 2)
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{
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC2_RGB,
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sources[2]));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND2_RGB,
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big_state->texture_combine_rgb_op[2]));
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}
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/* For the Alpha component */
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n_alpha_func_args =
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_cogl_get_n_args_for_combine_func (big_state->texture_combine_alpha_func);
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translate_sources (pipeline,
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n_alpha_func_args,
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big_state->texture_combine_alpha_src,
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sources);
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_ALPHA,
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sources[0]));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
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big_state->texture_combine_alpha_op[0]));
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if (n_alpha_func_args > 1)
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{
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_ALPHA,
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sources[1]));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
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big_state->texture_combine_alpha_op[1]));
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}
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if (n_alpha_func_args > 2)
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{
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_SRC2_ALPHA,
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sources[2]));
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GE (ctx, glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
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big_state->texture_combine_alpha_op[2]));
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}
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}
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if (layers_difference & COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT)
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{
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CoglPipelineLayer *authority =
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_cogl_pipeline_layer_get_authority
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(layer, COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT);
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CoglPipelineLayerBigState *big_state = authority->big_state;
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GE (ctx, glTexEnvfv (GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,
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big_state->texture_combine_constant));
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}
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return TRUE;
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}
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static CoglBool
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get_highest_unit_index_cb (CoglPipelineLayer *layer,
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void *user_data)
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{
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int unit_index = _cogl_pipeline_layer_get_unit_index (layer);
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int *highest_index = user_data;
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*highest_index = unit_index;
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return TRUE;
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}
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static CoglBool
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_cogl_pipeline_fragend_fixed_end (CoglPipeline *pipeline,
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unsigned long pipelines_difference)
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{
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int highest_unit_index = -1;
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int i;
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_COGL_GET_CONTEXT (ctx, FALSE);
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_cogl_pipeline_foreach_layer_internal (pipeline,
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get_highest_unit_index_cb,
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&highest_unit_index);
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/* Disable additional texture units that may have previously been in use.. */
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for (i = highest_unit_index + 1; i < ctx->texture_units->len; i++)
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_cogl_disable_texture_unit (i);
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if (pipelines_difference & COGL_PIPELINE_STATE_FOG)
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{
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CoglPipeline *authority =
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_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_FOG);
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CoglPipelineFogState *fog_state = &authority->big_state->fog_state;
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if (fog_state->enabled)
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{
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GLfloat fogColor[4];
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GLenum gl_mode = GL_LINEAR;
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fogColor[0] = cogl_color_get_red_float (&fog_state->color);
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fogColor[1] = cogl_color_get_green_float (&fog_state->color);
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fogColor[2] = cogl_color_get_blue_float (&fog_state->color);
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fogColor[3] = cogl_color_get_alpha_float (&fog_state->color);
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GE (ctx, glEnable (GL_FOG));
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GE (ctx, glFogfv (GL_FOG_COLOR, fogColor));
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if (ctx->driver == COGL_DRIVER_GLES1)
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switch (fog_state->mode)
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{
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case COGL_FOG_MODE_LINEAR:
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gl_mode = GL_LINEAR;
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break;
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case COGL_FOG_MODE_EXPONENTIAL:
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gl_mode = GL_EXP;
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break;
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case COGL_FOG_MODE_EXPONENTIAL_SQUARED:
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gl_mode = GL_EXP2;
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break;
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}
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/* TODO: support other modes for GLES2 */
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/* NB: GLES doesn't have glFogi */
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GE (ctx, glFogf (GL_FOG_MODE, gl_mode));
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GE (ctx, glHint (GL_FOG_HINT, GL_NICEST));
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GE (ctx, glFogf (GL_FOG_DENSITY, fog_state->density));
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GE (ctx, glFogf (GL_FOG_START, fog_state->z_near));
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GE (ctx, glFogf (GL_FOG_END, fog_state->z_far));
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}
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else
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GE (ctx, glDisable (GL_FOG));
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}
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return TRUE;
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}
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const CoglPipelineFragend _cogl_pipeline_fixed_fragend =
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{
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_cogl_pipeline_fragend_fixed_start,
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_cogl_pipeline_fragend_fixed_add_layer,
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NULL, /* passthrough */
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_cogl_pipeline_fragend_fixed_end,
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NULL, /* pipeline_change_notify */
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NULL, /* pipeline_set_parent_notify */
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NULL, /* layer_change_notify */
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};
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#endif /* COGL_PIPELINE_FRAGEND_FIXED */
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