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 "gpu/command_buffer/service/shader_translator_cache.h"
   6
   7 namespace gpu {
   8 namespace gles2 {
   9
  10 ShaderTranslatorCache::ShaderTranslatorCache() {
  11 }
  12
  13 ShaderTranslatorCache::~ShaderTranslatorCache() {
  14   DCHECK(cache_.empty());
  15 }
  16
  17 void ShaderTranslatorCache::OnDestruct(ShaderTranslator* translator) {
  18   Cache::iterator it = cache_.begin();
  19   while (it != cache_.end()) {
  20     if (it->second == translator) {
  21       cache_.erase(it);
  22       return;
  23     }
  24     it++;
  25   }
  26 }
  27
  28 scoped_refptr<ShaderTranslator> ShaderTranslatorCache::GetTranslator(
  29     ShShaderType shader_type,
  30     ShShaderSpec shader_spec,
  31     const ShBuiltInResources* resources,
  32     ShaderTranslatorInterface::GlslImplementationType
  33         glsl_implementation_type,
  34     ShCompileOptions driver_bug_workarounds) {
  35   ShaderTranslatorInitParams params(shader_type,
  36                                     shader_spec,
  37                                     *resources,
  38                                     glsl_implementation_type,
  39                                     driver_bug_workarounds);
  40
  41   Cache::iterator it = cache_.find(params);
  42   if (it != cache_.end())
  43     return it->second;
  44
  45   ShaderTranslator* translator = new ShaderTranslator();
  46   if (translator->Init(shader_type, shader_spec, resources,
  47                        glsl_implementation_type,
  48                        driver_bug_workarounds)) {
  49     cache_[params] = translator;
  50     translator->AddDestructionObserver(this);
  51     return translator;
  52   } else {
  53     return NULL;
  54   }
  55 }
  56
  57 }  // namespace gles2
  58 }  // namespace gpu