Correctly track texture cleared state when sharing

gpu/command_buffer/service/texture_definition.cc

 // Copyright 2014 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/texture_definition.h"
 
 #include <list>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 395 matching lines @@
   texture->wrap_s_ = wrap_s_;
   texture->wrap_t_ = wrap_t_;
   texture->usage_ = usage_;
 }
 
 bool TextureDefinition::Matches(const Texture* texture) const {
   DCHECK(target_ == texture->target());
   if (texture->min_filter_ != min_filter_ ||
       texture->mag_filter_ != mag_filter_ ||
       texture->wrap_s_ != wrap_s_ ||
-      texture->wrap_t_ != wrap_t_) {
+      texture->wrap_t_ != wrap_t_ ||
+      texture->SafeToRenderFrom() != SafeToRenderFrom()) {
     return false;
   }
 
   // All structural changes should have orphaned the texture.
   if (image_buffer_.get() && !texture->GetLevelImage(texture->target(), 0))
     return false;
 
   return true;
 }
 
+bool TextureDefinition::SafeToRenderFrom() const {
+  for (size_t i = 0; i < level_infos_.size(); i++) {
+    const std::vector<LevelInfo>& face_info = level_infos_[i];
+    for (size_t j = 0; j < face_info.size(); ++j) {

[no sievers, 2015/01/29 20:23:49]

for (const std::vector<LevelInfo>& face_info : level_infos_[i])! :-)

[boliu, 2015/01/29 22:04:34]

Done. c++11 all the way!

+      if (!face_info[j].cleared) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
 }  // namespace gles2
 }  // namespace gpu