Cache shader translators.

Each shader translator takes about 700 KB of memory in the GPU proces in Release. There are typically between 2-4 of these per tab with --force-compositing-mode. This CL introduces a cache, so that tabs share shader translators whenever possible.

BUG=132426
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10535128

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@142002 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 21 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/shader_translator.cc b/gpu/command_buffer/service/shader_translator.cc
index 63f1457..6839736 100644
--- a/gpu/command_buffer/service/shader_translator.cc
+++ b/gpu/command_buffer/service/shader_translator.cc
@@ -5,6 +5,7 @@
 #include "gpu/command_buffer/service/shader_translator.h"
 
 #include <string.h>
+#include <algorithm>
 
 #include "base/at_exit.h"
 #include "base/logging.h"
@@ -76,6 +77,12 @@ void GetVariableInfo(ShHandle compiler, ShShaderInfo var_type,
 namespace gpu {
 namespace gles2 {
 
+ShaderTranslator::DestructionObserver::DestructionObserver() {
+}
+
+ShaderTranslator::DestructionObserver::~DestructionObserver() {
+}
+
 ShaderTranslator::ShaderTranslator()
     : compiler_(NULL),
       implementation_is_glsl_es_(false),
@@ -83,6 +90,10 @@ ShaderTranslator::ShaderTranslator()
 }
 
 ShaderTranslator::~ShaderTranslator() {
+  FOR_EACH_OBSERVER(DestructionObserver,
+                    destruction_observers_,
+                    OnDestruct(this));
+
   if (compiler_ != NULL)
     ShDestruct(compiler_);
 }
@@ -170,6 +181,16 @@ ShaderTranslator::uniform_map() const {
   return uniform_map_;
 }
 
+void ShaderTranslator::AddDestructionObserver(
+    DestructionObserver* observer) {
+  destruction_observers_.AddObserver(observer);
+}
+
+void ShaderTranslator::RemoveDestructionObserver(
+    DestructionObserver* observer) {
+  destruction_observers_.RemoveObserver(observer);
+}
+
 void ShaderTranslator::ClearResults() {
   translated_shader_.reset();
   info_log_.reset();