cc: Adding support for RGBA_4444 tile textures

cc/layers/texture_layer_impl.cc

 // Copyright 2011 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 "cc/layers/texture_layer_impl.h"
 
+#include <vector>

[vangelis, 2013/09/11 06:11:37]

Is this new include needed? 

[kaanb, 2013/09/12 07:53:44]

include-what-you-use presubmit script asked me to add it.

[vangelis, 2013/09/12 16:41:56]

Hmm... Maybe from some previous incarnation of the code?  I'm not seeing any new
<vector> stuff in your diff.

[kaanb, 2013/09/13 00:11:08]

vector is being used in line 116. I think the presubmit started enforcing the
include-what-you-use after that code was added.

+
 #include "base/strings/stringprintf.h"
 #include "cc/layers/quad_sink.h"
 #include "cc/output/renderer.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/resources/platform_color.h"
 #include "cc/resources/scoped_resource.h"
 #include "cc/trees/layer_tree_impl.h"
 
 namespace cc {
 
@@ skipping 77 matching lines @@
       DCHECK(!external_texture_resource_);
       // Have to upload a copy to a texture for it to be used in a
       // hardware draw.
       if (!texture_copy_)
         texture_copy_ = ScopedResource::create(resource_provider);
       if (texture_copy_->size() != texture_mailbox_.shared_memory_size() ||
           resource_provider->InUseByConsumer(texture_copy_->id()))
         texture_copy_->Free();
 
       if (!texture_copy_->id()) {
+        GLenum best_texture_format = resource_provider->best_texture_format();
         texture_copy_->Allocate(texture_mailbox_.shared_memory_size(),
-                                resource_provider->best_texture_format(),
-                                ResourceProvider::TextureUsageAny);
+                                best_texture_format,
+                                ResourceProvider::TextureUsageAny,
+                                best_texture_format == GL_RGBA ?
+                                ResourceProvider::RGBA_8888 :
+                                ResourceProvider::RGBA_4444);
       }
 
       if (texture_copy_->id()) {
         std::vector<uint8> swizzled;
         uint8* pixels =
             static_cast<uint8*>(texture_mailbox_.shared_memory()->memory());
 
         if (!PlatformColor::SameComponentOrder(texture_copy_->format())) {
           // Swizzle colors. This is slow, but should be really uncommon.
           swizzled.resize(texture_mailbox_.shared_memory_size_in_bytes());
@@ skipping 116 matching lines @@
   } else if (external_texture_resource_) {
     DCHECK(!own_mailbox_);
     ResourceProvider* resource_provider =
         layer_tree_impl()->resource_provider();
     resource_provider->DeleteResource(external_texture_resource_);
     external_texture_resource_ = 0;
   }
 }
 
 }  // namespace cc