gpu/command_buffer/service/shader_translator_cache.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <GLES2/gl2.h>
   6
   7 #include "gpu/command_buffer/service/shader_translator_cache.h"
   8
   9 namespace gpu {
  10 namespace gles2 {
  11
  12 ShaderTranslatorCache::ShaderTranslatorCache() {
  13 }
  14
  15 ShaderTranslatorCache::~ShaderTranslatorCache() {
  16   DCHECK(cache_.empty());
  17 }
  18
  19 void ShaderTranslatorCache::OnDestruct(ShaderTranslator* translator) {
  20   Cache::iterator it = cache_.begin();
  21   while (it != cache_.end()) {
  22     if (it->second == translator) {
  23       cache_.erase(it);
  24       return;
  25     }
  26     it++;
  27   }
  28 }
  29
  30 scoped_refptr<ShaderTranslator> ShaderTranslatorCache::GetTranslator(
  31 #if (ANGLE_SH_VERSION >= 126)
  32     sh::GLenum shader_type,
  33 #else
  34     ShShaderType shader_type,
  35 #endif
  36     ShShaderSpec shader_spec,
  37     const ShBuiltInResources* resources,
  38     ShaderTranslatorInterface::GlslImplementationType
  39         glsl_implementation_type,
  40     ShCompileOptions driver_bug_workarounds) {
  41   ShaderTranslatorInitParams params(shader_type,
  42                                     shader_spec,
  43                                     *resources,
  44                                     glsl_implementation_type,
  45                                     driver_bug_workarounds);
  46
  47   Cache::iterator it = cache_.find(params);
  48   if (it != cache_.end())
  49     return it->second;
  50
  51   ShaderTranslator* translator = new ShaderTranslator();
  52   if (translator->Init(shader_type, shader_spec, resources,
  53                        glsl_implementation_type,
  54                        driver_bug_workarounds)) {
  55     cache_[params] = translator;
  56     translator->AddDestructionObserver(this);
  57     return translator;
  58   } else {
  59     return NULL;
  60   }
  61 }
  62
  63 }  // namespace gles2
  64 }  // namespace gpu