1 files changed, 85 insertions, 0 deletions
diff --git a/gpu/command_buffer/service/shader_translator.cc b/gpu/command_buffer/service/shader_translator.cc
new file mode 100644
index 0000000..dd3ea24
--- /dev/null
+++ b/gpu/command_buffer/service/shader_translator.cc
@@ -0,0 +1,85 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/command_buffer/service/shader_translator.h"
+
+#include "base/at_exit.h"
+#include "base/logging.h"
+
+namespace {
+void FinalizeShaderTranslator(void* /* dummy */) {
+  ShFinalize();
+}
+
+bool InitializeShaderTranslator() {
+  static bool initialized = false;
+  if (!initialized && ShInitialize()) {
+    base::AtExitManager::RegisterCallback(&FinalizeShaderTranslator, NULL);
+    initialized = true;
+  }
+  return initialized;
+}
+}  // namespace
+
+namespace gpu {
+namespace gles2 {
+
+ShaderTranslator::ShaderTranslator() : compiler_(NULL) {
+}
+
+ShaderTranslator::~ShaderTranslator() {
+  if (compiler_ != NULL)
+    ShDestruct(compiler_);
+}
+
+bool ShaderTranslator::Init(EShLanguage language,
+                            const TBuiltInResource* resources) {
+  // Make sure Init is called only once.
+  DCHECK(compiler_ == NULL);
+  DCHECK(language == EShLangVertex || language == EShLangFragment);
+  DCHECK(resources != NULL);
+
+  if (!InitializeShaderTranslator())
+    return false;
+
+  compiler_ = ShConstructCompiler(language, EShSpecGLES2, resources);
+  return compiler_ != NULL;
+}
+
+bool ShaderTranslator::Translate(const char* shader) {
+  // Make sure this instance is initialized.
+  DCHECK(compiler_ != NULL);
+  DCHECK(shader != NULL);
+  ClearResults();
+
+  bool success = false;
+  int compile_options = EShOptObjectCode;
+  if (ShCompile(compiler_, &shader, 1, compile_options)) {
+    // Get translated shader.
+    int obj_code_len = 0;
+    ShGetInfo(compiler_, SH_OBJECT_CODE_LENGTH, &obj_code_len);
+    translated_shader_.reset(new char[obj_code_len]);
+    ShGetObjectCode(compiler_, translated_shader_.get());
+
+    // TODO(alokp): Get attribs and uniforms.
+    success = true;
+  }
+
+  // Get info log.
+  int info_log_len = 0;
+  ShGetInfo(compiler_, SH_INFO_LOG_LENGTH, &info_log_len);
+  info_log_.reset(new char[info_log_len]);
+  ShGetInfoLog(compiler_, info_log_.get());
+
+  return success;
+}
+
+void ShaderTranslator::ClearResults() {
+  translated_shader_.reset();
+  info_log_.reset();
+}
+
+}  // namespace gles2
+}  // namespace gpu
+