command_buffer: Implement EXT_blend_func_extended

gpu/command_buffer/client/program_info_manager.cc

 // Copyright (c) 2012 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/client/program_info_manager.h"
 
 namespace {
 
 template<typename T> static T LocalGetAs(
     const std::vector<int8>& data, uint32 offset, size_t size) {
@@ skipping 146 matching lines @@
     // See "OpenGL ES 3.0.0, Section 2.11.3 Program Objects."
     if (info.name == name ||
         (info.is_array &&
          info.name.compare(0, info.name.size() - 3, name) == 0)) {
       return ii;
     }
   }
   return GL_INVALID_INDEX;
 }
 
+GLint ProgramInfoManager::Program::GetFragDataIndex(
+    const std::string& name) const {
+  base::hash_map<std::string, GLint>::const_iterator iter =
+      frag_data_indices_.find(name);
+  if (iter == frag_data_indices_.end())
+    return -1;
+  return iter->second;
+}
+
+void ProgramInfoManager::Program::CacheFragDataIndex(const std::string& name,
+                                                     GLint index) {
+  frag_data_indices_[name] = index;
+}
+
 GLint ProgramInfoManager::Program::GetFragDataLocation(
     const std::string& name) const {
   base::hash_map<std::string, GLint>::const_iterator iter =
       frag_data_locations_.find(name);
   if (iter == frag_data_locations_.end())
     return -1;
   return iter->second;
 }
 
 void ProgramInfoManager::Program::CacheFragDataLocation(
@@ skipping 537 matching lines @@
   {
     base::AutoLock auto_lock(lock_);
     Program* info = GetProgramInfo(gl, program, kES2);
     if (info) {
       return info->GetUniformLocation(name);
     }
   }
   return gl->GetUniformLocationHelper(program, name);
 }
 
+GLint ProgramInfoManager::GetFragDataIndex(GLES2Implementation* gl,
+                                           GLuint program,
+                                           const char* name) {
+  // TODO(zmo): make FragData indexes part of the ProgramInfo that are
+  // fetched altogether from the service side.  See crbug.com/452104.
+  {
+    base::AutoLock auto_lock(lock_);
+    Program* info = GetProgramInfo(gl, program, kNone);
+    if (info) {
+      GLint possible_index = info->GetFragDataIndex(name);
+      if (possible_index != -1)
+        return possible_index;
+    }
+  }
+  GLint index = gl->GetFragDataIndexEXTHelper(program, name);
+  if (index != -1) {
+    base::AutoLock auto_lock(lock_);
+    Program* info = GetProgramInfo(gl, program, kNone);
+    if (info) {
+      info->CacheFragDataIndex(name, index);
+    }
+  }
+  return index;
+}
+
 GLint ProgramInfoManager::GetFragDataLocation(
     GLES2Implementation* gl, GLuint program, const char* name) {
   // TODO(zmo): make FragData locations part of the ProgramInfo that are
   // fetched altogether from the service side.  See crbug.com/452104.
   {
     base::AutoLock auto_lock(lock_);
     Program* info = GetProgramInfo(gl, program, kNone);
     if (info) {
       GLint possible_loc = info->GetFragDataLocation(name);
       if (possible_loc != -1)
@@ skipping 256 matching lines @@
       }
       return true;
     }
   }
   return gl->GetUniformIndicesHelper(program, count, names, indices);
 }
 
 }  // namespace gles2
 }  // namespace gpu