c5644723f8
Previously the private feature flags were stored in an enum and we already had 31 flags. Adding the 32nd flag would presumably make it add -2³¹ as one of the values which might cause problems. To avoid this we'll just use an fixed-size array of longs and use indices for the enum values like we do for the public features. A slight complication with this is in the CoglDriverDescription where we were previously using a static intialised value to describe the set of features that the driver supports. We can't easily do this with the flags array so instead the features are stored in a fixed-size array of indices. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit d94cb984e3c93630f3c2e6e3be9d189672aa20f3) Conflicts: cogl/cogl-context-private.h cogl/cogl-context.c cogl/cogl-private.h cogl/cogl-renderer.c cogl/driver/gl/cogl-pipeline-opengl.c cogl/driver/gl/gl/cogl-driver-gl.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c cogl/driver/gl/gles/cogl-driver-gles.c cogl/driver/nop/cogl-driver-nop.c
661 lines
22 KiB
C
661 lines
22 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) 2010,2013 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
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* <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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*/
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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 <test-fixtures/test-unit.h>
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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-opengl-private.h"
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#ifdef COGL_PIPELINE_VERTEND_GLSL
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#include "cogl-context-private.h"
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#include "cogl-object-private.h"
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#include "cogl-program-private.h"
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#include "cogl-pipeline-vertend-glsl-private.h"
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#include "cogl-pipeline-state-private.h"
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#include "cogl-glsl-shader-private.h"
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const CoglPipelineVertend _cogl_pipeline_glsl_vertend;
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typedef struct
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{
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unsigned int ref_count;
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GLuint gl_shader;
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GString *header, *source;
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} CoglPipelineShaderState;
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static CoglUserDataKey shader_state_key;
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static CoglPipelineShaderState *
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shader_state_new (void)
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{
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CoglPipelineShaderState *shader_state;
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shader_state = g_slice_new0 (CoglPipelineShaderState);
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shader_state->ref_count = 1;
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return shader_state;
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}
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static CoglPipelineShaderState *
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get_shader_state (CoglPipeline *pipeline)
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{
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return cogl_object_get_user_data (COGL_OBJECT (pipeline), &shader_state_key);
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}
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static void
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destroy_shader_state (void *user_data)
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{
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CoglPipelineShaderState *shader_state = user_data;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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if (--shader_state->ref_count == 0)
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{
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if (shader_state->gl_shader)
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GE( ctx, glDeleteShader (shader_state->gl_shader) );
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g_slice_free (CoglPipelineShaderState, shader_state);
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}
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}
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static void
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set_shader_state (CoglPipeline *pipeline,
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CoglPipelineShaderState *shader_state)
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{
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cogl_object_set_user_data (COGL_OBJECT (pipeline),
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&shader_state_key,
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shader_state,
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destroy_shader_state);
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}
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static void
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dirty_shader_state (CoglPipeline *pipeline)
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{
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cogl_object_set_user_data (COGL_OBJECT (pipeline),
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&shader_state_key,
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NULL,
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NULL);
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}
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GLuint
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_cogl_pipeline_vertend_glsl_get_shader (CoglPipeline *pipeline)
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{
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CoglPipelineShaderState *shader_state = get_shader_state (pipeline);
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if (shader_state)
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return shader_state->gl_shader;
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else
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return 0;
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}
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static CoglPipelineSnippetList *
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get_vertex_snippets (CoglPipeline *pipeline)
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{
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pipeline =
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_cogl_pipeline_get_authority (pipeline,
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COGL_PIPELINE_STATE_VERTEX_SNIPPETS);
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return &pipeline->big_state->vertex_snippets;
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}
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static CoglPipelineSnippetList *
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get_layer_vertex_snippets (CoglPipelineLayer *layer)
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{
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unsigned long state = COGL_PIPELINE_LAYER_STATE_VERTEX_SNIPPETS;
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layer = _cogl_pipeline_layer_get_authority (layer, state);
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return &layer->big_state->vertex_snippets;
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}
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static CoglBool
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add_layer_declaration_cb (CoglPipelineLayer *layer,
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void *user_data)
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{
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CoglPipelineShaderState *shader_state = user_data;
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CoglTextureType texture_type =
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_cogl_pipeline_layer_get_texture_type (layer);
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const char *target_string;
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_cogl_gl_util_get_texture_target_string (texture_type, &target_string, NULL);
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g_string_append_printf (shader_state->header,
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"uniform sampler%s cogl_sampler%i;\n",
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target_string,
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layer->index);
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return TRUE;
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}
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static void
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add_layer_declarations (CoglPipeline *pipeline,
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CoglPipelineShaderState *shader_state)
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{
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/* We always emit sampler uniforms in case there will be custom
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* layer snippets that want to sample arbitrary layers. */
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_cogl_pipeline_foreach_layer_internal (pipeline,
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add_layer_declaration_cb,
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shader_state);
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}
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static void
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add_global_declarations (CoglPipeline *pipeline,
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CoglPipelineShaderState *shader_state)
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{
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CoglSnippetHook hook = COGL_SNIPPET_HOOK_VERTEX_GLOBALS;
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CoglPipelineSnippetList *snippets = get_vertex_snippets (pipeline);
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/* Add the global data hooks. All of the code in these snippets is
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* always added and only the declarations data is used */
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_cogl_pipeline_snippet_generate_declarations (shader_state->header,
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hook,
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snippets);
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}
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static void
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_cogl_pipeline_vertend_glsl_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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CoglPipelineShaderState *shader_state;
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CoglPipeline *template_pipeline = NULL;
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CoglProgram *user_program = cogl_pipeline_get_user_program (pipeline);
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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/* Now lookup our glsl backend private state (allocating if
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* necessary) */
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shader_state = get_shader_state (pipeline);
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if (shader_state == NULL)
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{
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CoglPipeline *authority;
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/* Get the authority for anything affecting vertex shader
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state */
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authority = _cogl_pipeline_find_equivalent_parent
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(pipeline,
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_cogl_pipeline_get_state_for_vertex_codegen (ctx) &
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~COGL_PIPELINE_STATE_LAYERS,
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COGL_PIPELINE_LAYER_STATE_AFFECTS_VERTEX_CODEGEN);
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shader_state = get_shader_state (authority);
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if (shader_state == NULL)
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{
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/* Check if there is already a similar cached pipeline whose
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shader state we can share */
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if (G_LIKELY (!(COGL_DEBUG_ENABLED
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(COGL_DEBUG_DISABLE_PROGRAM_CACHES))))
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{
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template_pipeline =
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_cogl_pipeline_cache_get_vertex_template (ctx->pipeline_cache,
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authority);
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shader_state = get_shader_state (template_pipeline);
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}
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if (shader_state)
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shader_state->ref_count++;
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else
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shader_state = shader_state_new ();
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set_shader_state (authority, shader_state);
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if (template_pipeline)
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{
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shader_state->ref_count++;
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set_shader_state (template_pipeline, shader_state);
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}
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}
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if (authority != pipeline)
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{
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shader_state->ref_count++;
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set_shader_state (pipeline, shader_state);
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}
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}
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if (user_program)
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{
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/* If the user program contains a vertex shader then we don't need
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to generate one */
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if (_cogl_program_has_vertex_shader (user_program))
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{
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if (shader_state->gl_shader)
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{
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GE( ctx, glDeleteShader (shader_state->gl_shader) );
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shader_state->gl_shader = 0;
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}
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return;
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}
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}
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if (shader_state->gl_shader)
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return;
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/* If we make it here then we have a shader_state struct without a gl_shader
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either because this is the first time we've encountered it or
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because the user program has changed */
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/* We reuse two grow-only GStrings for code-gen. One string
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contains the uniform and attribute declarations while the
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other contains the main function. We need two strings
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because we need to dynamically declare attributes as the
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add_layer callback is invoked */
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g_string_set_size (ctx->codegen_header_buffer, 0);
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g_string_set_size (ctx->codegen_source_buffer, 0);
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shader_state->header = ctx->codegen_header_buffer;
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shader_state->source = ctx->codegen_source_buffer;
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add_layer_declarations (pipeline, shader_state);
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add_global_declarations (pipeline, shader_state);
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g_string_append (shader_state->source,
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"void\n"
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"cogl_generated_source ()\n"
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"{\n");
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if (cogl_pipeline_get_per_vertex_point_size (pipeline))
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g_string_append (shader_state->header,
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"attribute float cogl_point_size_in;\n");
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else if (!_cogl_has_private_feature
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(ctx, COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM))
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{
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/* There is no builtin uniform for the point size on GLES2 so we
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need to copy it from the custom uniform in the vertex shader
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if we're not using per-vertex point sizes, however we'll only
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do this if the point-size is non-zero. Toggle the point size
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between zero and non-zero causes a state change which
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generates a new program */
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if (cogl_pipeline_get_point_size (pipeline) > 0.0f)
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{
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g_string_append (shader_state->header,
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"uniform float cogl_point_size_in;\n");
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g_string_append (shader_state->source,
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" cogl_point_size_out = cogl_point_size_in;\n");
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}
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}
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}
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static CoglBool
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_cogl_pipeline_vertend_glsl_add_layer (CoglPipeline *pipeline,
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CoglPipelineLayer *layer,
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unsigned long layers_difference,
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CoglFramebuffer *framebuffer)
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{
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CoglPipelineShaderState *shader_state;
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CoglPipelineSnippetData snippet_data;
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int layer_index = layer->index;
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_COGL_GET_CONTEXT (ctx, FALSE);
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shader_state = get_shader_state (pipeline);
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if (shader_state->source == NULL)
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return TRUE;
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/* Transform the texture coordinates by the layer's user matrix.
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*
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* FIXME: this should avoid doing the transform if there is no user
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* matrix set. This might need a separate layer state flag for
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* whether there is a user matrix
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*
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* FIXME: we could be more clever here and try to detect if the
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* fragment program is going to use the texture coordinates and
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* avoid setting them if not
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*/
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g_string_append_printf (shader_state->header,
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"vec4\n"
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"cogl_real_transform_layer%i (mat4 matrix, "
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"vec4 tex_coord)\n"
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"{\n"
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" return matrix * tex_coord;\n"
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"}\n",
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layer_index);
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/* Wrap the layer code in any snippets that have been hooked */
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memset (&snippet_data, 0, sizeof (snippet_data));
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snippet_data.snippets = get_layer_vertex_snippets (layer);
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snippet_data.hook = COGL_SNIPPET_HOOK_TEXTURE_COORD_TRANSFORM;
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snippet_data.chain_function = g_strdup_printf ("cogl_real_transform_layer%i",
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layer_index);
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snippet_data.final_name = g_strdup_printf ("cogl_transform_layer%i",
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layer_index);
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snippet_data.function_prefix = g_strdup_printf ("cogl_transform_layer%i",
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layer_index);
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snippet_data.return_type = "vec4";
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snippet_data.return_variable = "cogl_tex_coord";
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snippet_data.return_variable_is_argument = TRUE;
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snippet_data.arguments = "cogl_matrix, cogl_tex_coord";
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snippet_data.argument_declarations = "mat4 cogl_matrix, vec4 cogl_tex_coord";
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snippet_data.source_buf = shader_state->header;
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_cogl_pipeline_snippet_generate_code (&snippet_data);
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g_free ((char *) snippet_data.chain_function);
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g_free ((char *) snippet_data.final_name);
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g_free ((char *) snippet_data.function_prefix);
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g_string_append_printf (shader_state->source,
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" cogl_tex_coord%i_out = "
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"cogl_transform_layer%i (cogl_texture_matrix%i,\n"
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" "
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" cogl_tex_coord%i_in);\n",
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layer_index,
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layer_index,
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layer_index,
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layer_index);
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return TRUE;
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}
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static CoglBool
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_cogl_pipeline_vertend_glsl_end (CoglPipeline *pipeline,
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unsigned long pipelines_difference)
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{
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CoglPipelineShaderState *shader_state;
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_COGL_GET_CONTEXT (ctx, FALSE);
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shader_state = get_shader_state (pipeline);
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if (shader_state->source)
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{
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const char *source_strings[2];
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GLint lengths[2];
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GLint compile_status;
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GLuint shader;
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CoglPipelineSnippetData snippet_data;
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CoglPipelineSnippetList *vertex_snippets;
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CoglBool has_per_vertex_point_size =
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cogl_pipeline_get_per_vertex_point_size (pipeline);
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COGL_STATIC_COUNTER (vertend_glsl_compile_counter,
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"glsl vertex compile counter",
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"Increments each time a new GLSL "
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"vertex shader is compiled",
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0 /* no application private data */);
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COGL_COUNTER_INC (_cogl_uprof_context, vertend_glsl_compile_counter);
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g_string_append (shader_state->header,
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"void\n"
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"cogl_real_vertex_transform ()\n"
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"{\n"
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" cogl_position_out = "
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"cogl_modelview_projection_matrix * "
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"cogl_position_in;\n"
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"}\n");
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g_string_append (shader_state->source,
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" cogl_vertex_transform ();\n");
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if (has_per_vertex_point_size)
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{
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g_string_append (shader_state->header,
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"void\n"
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"cogl_real_point_size_calculation ()\n"
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"{\n"
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" cogl_point_size_out = cogl_point_size_in;\n"
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"}\n");
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g_string_append (shader_state->source,
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" cogl_point_size_calculation ();\n");
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}
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g_string_append (shader_state->source,
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" cogl_color_out = cogl_color_in;\n"
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"}\n");
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vertex_snippets = get_vertex_snippets (pipeline);
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/* Add hooks for the vertex transform part */
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memset (&snippet_data, 0, sizeof (snippet_data));
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snippet_data.snippets = vertex_snippets;
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snippet_data.hook = COGL_SNIPPET_HOOK_VERTEX_TRANSFORM;
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snippet_data.chain_function = "cogl_real_vertex_transform";
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snippet_data.final_name = "cogl_vertex_transform";
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snippet_data.function_prefix = "cogl_vertex_transform";
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snippet_data.source_buf = shader_state->header;
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_cogl_pipeline_snippet_generate_code (&snippet_data);
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/* Add hooks for the point size calculation part */
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if (has_per_vertex_point_size)
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{
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memset (&snippet_data, 0, sizeof (snippet_data));
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snippet_data.snippets = vertex_snippets;
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snippet_data.hook = COGL_SNIPPET_HOOK_POINT_SIZE;
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snippet_data.chain_function = "cogl_real_point_size_calculation";
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snippet_data.final_name = "cogl_point_size_calculation";
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snippet_data.function_prefix = "cogl_point_size_calculation";
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snippet_data.source_buf = shader_state->header;
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_cogl_pipeline_snippet_generate_code (&snippet_data);
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}
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/* Add all of the hooks for vertex processing */
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memset (&snippet_data, 0, sizeof (snippet_data));
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snippet_data.snippets = vertex_snippets;
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snippet_data.hook = COGL_SNIPPET_HOOK_VERTEX;
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snippet_data.chain_function = "cogl_generated_source";
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snippet_data.final_name = "cogl_vertex_hook";
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snippet_data.function_prefix = "cogl_vertex_hook";
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snippet_data.source_buf = shader_state->source;
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_cogl_pipeline_snippet_generate_code (&snippet_data);
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g_string_append (shader_state->source,
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"void\n"
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"main ()\n"
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"{\n"
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" cogl_vertex_hook ();\n");
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|
|
/* If there are any snippets then we can't rely on the
|
|
projection matrix to flip the rendering for offscreen buffers
|
|
so we'll need to flip it using an extra statement and a
|
|
uniform */
|
|
if (_cogl_pipeline_has_vertex_snippets (pipeline))
|
|
{
|
|
g_string_append (shader_state->header,
|
|
"uniform vec4 _cogl_flip_vector;\n");
|
|
g_string_append (shader_state->source,
|
|
" cogl_position_out *= _cogl_flip_vector;\n");
|
|
}
|
|
|
|
g_string_append (shader_state->source,
|
|
"}\n");
|
|
|
|
GE_RET( shader, ctx, glCreateShader (GL_VERTEX_SHADER) );
|
|
|
|
lengths[0] = shader_state->header->len;
|
|
source_strings[0] = shader_state->header->str;
|
|
lengths[1] = shader_state->source->len;
|
|
source_strings[1] = shader_state->source->str;
|
|
|
|
_cogl_glsl_shader_set_source_with_boilerplate (ctx,
|
|
shader, GL_VERTEX_SHADER,
|
|
pipeline,
|
|
2, /* count */
|
|
source_strings, lengths);
|
|
|
|
GE( ctx, glCompileShader (shader) );
|
|
GE( ctx, glGetShaderiv (shader, GL_COMPILE_STATUS, &compile_status) );
|
|
|
|
if (!compile_status)
|
|
{
|
|
GLint len = 0;
|
|
char *shader_log;
|
|
|
|
GE( ctx, glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &len) );
|
|
shader_log = g_alloca (len);
|
|
GE( ctx, glGetShaderInfoLog (shader, len, &len, shader_log) );
|
|
g_warning ("Shader compilation failed:\n%s", shader_log);
|
|
}
|
|
|
|
shader_state->header = NULL;
|
|
shader_state->source = NULL;
|
|
shader_state->gl_shader = shader;
|
|
}
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
if (_cogl_has_private_feature
|
|
(ctx, COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM) &&
|
|
(pipelines_difference & COGL_PIPELINE_STATE_POINT_SIZE))
|
|
{
|
|
CoglPipeline *authority =
|
|
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_POINT_SIZE);
|
|
|
|
if (authority->big_state->point_size > 0.0f)
|
|
GE( ctx, glPointSize (authority->big_state->point_size) );
|
|
}
|
|
#endif /* HAVE_COGL_GL */
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
_cogl_pipeline_vertend_glsl_pre_change_notify (CoglPipeline *pipeline,
|
|
CoglPipelineState change,
|
|
const CoglColor *new_color)
|
|
{
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
if ((change & _cogl_pipeline_get_state_for_vertex_codegen (ctx)))
|
|
dirty_shader_state (pipeline);
|
|
}
|
|
|
|
/* NB: layers are considered immutable once they have any dependants
|
|
* so although multiple pipelines can end up depending on a single
|
|
* static layer, we can guarantee that if a layer is being *changed*
|
|
* then it can only have one pipeline depending on it.
|
|
*
|
|
* XXX: Don't forget this is *pre* change, we can't read the new value
|
|
* yet!
|
|
*/
|
|
static void
|
|
_cogl_pipeline_vertend_glsl_layer_pre_change_notify (
|
|
CoglPipeline *owner,
|
|
CoglPipelineLayer *layer,
|
|
CoglPipelineLayerState change)
|
|
{
|
|
CoglPipelineShaderState *shader_state;
|
|
|
|
shader_state = get_shader_state (owner);
|
|
if (!shader_state)
|
|
return;
|
|
|
|
if ((change & COGL_PIPELINE_LAYER_STATE_AFFECTS_VERTEX_CODEGEN))
|
|
{
|
|
dirty_shader_state (owner);
|
|
return;
|
|
}
|
|
|
|
/* TODO: we could be saving snippets of texture combine code along
|
|
* with each layer and then when a layer changes we would just free
|
|
* the snippet. */
|
|
}
|
|
|
|
const CoglPipelineVertend _cogl_pipeline_glsl_vertend =
|
|
{
|
|
_cogl_pipeline_vertend_glsl_start,
|
|
_cogl_pipeline_vertend_glsl_add_layer,
|
|
_cogl_pipeline_vertend_glsl_end,
|
|
_cogl_pipeline_vertend_glsl_pre_change_notify,
|
|
_cogl_pipeline_vertend_glsl_layer_pre_change_notify
|
|
};
|
|
|
|
UNIT_TEST (check_point_size_shader,
|
|
0 /* no requirements */,
|
|
0 /* no failure cases */)
|
|
{
|
|
CoglPipeline *pipelines[4];
|
|
CoglPipelineShaderState *shader_states[G_N_ELEMENTS (pipelines)];
|
|
int i;
|
|
|
|
/* Default pipeline with zero point size */
|
|
pipelines[0] = cogl_pipeline_new (test_ctx);
|
|
|
|
/* Point size 1 */
|
|
pipelines[1] = cogl_pipeline_new (test_ctx);
|
|
cogl_pipeline_set_point_size (pipelines[1], 1.0f);
|
|
|
|
/* Point size 2 */
|
|
pipelines[2] = cogl_pipeline_new (test_ctx);
|
|
cogl_pipeline_set_point_size (pipelines[2], 2.0f);
|
|
|
|
/* Same as the first pipeline, but reached by restoring the old
|
|
* state from a copy */
|
|
pipelines[3] = cogl_pipeline_copy (pipelines[1]);
|
|
cogl_pipeline_set_point_size (pipelines[3], 0.0f);
|
|
|
|
/* Draw something with all of the pipelines to make sure their state
|
|
* is flushed */
|
|
for (i = 0; i < G_N_ELEMENTS (pipelines); i++)
|
|
cogl_framebuffer_draw_rectangle (test_fb,
|
|
pipelines[i],
|
|
0.0f, 0.0f,
|
|
10.0f, 10.0f);
|
|
cogl_framebuffer_finish (test_fb);
|
|
|
|
/* Get all of the shader states. These might be NULL if the driver
|
|
* is not using GLSL */
|
|
for (i = 0; i < G_N_ELEMENTS (pipelines); i++)
|
|
shader_states[i] = get_shader_state (pipelines[i]);
|
|
|
|
/* If the first two pipelines are using GLSL then they should have
|
|
* the same shader unless there is no builtin uniform for the point
|
|
* size */
|
|
if (shader_states[0])
|
|
{
|
|
if (_cogl_has_private_feature
|
|
(test_ctx, COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM))
|
|
g_assert (shader_states[0] == shader_states[1]);
|
|
else
|
|
g_assert (shader_states[0] != shader_states[1]);
|
|
}
|
|
|
|
/* The second and third pipelines should always have the same shader
|
|
* state because only toggling between zero and non-zero should
|
|
* change the shader */
|
|
g_assert (shader_states[1] == shader_states[2]);
|
|
|
|
/* The fourth pipeline should be exactly the same as the first */
|
|
g_assert (shader_states[0] == shader_states[3]);
|
|
}
|
|
|
|
#endif /* COGL_PIPELINE_VERTEND_GLSL */
|