cc: Support texcoord offsets in YUVVideoDrawQuad

cc/layers/video_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/video_layer_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "cc/layers/quad_sink.h"
 #include "cc/layers/video_frame_provider_client_impl.h"
@@ skipping 121 matching lines @@
       quad_sink->UseSharedQuadState(CreateSharedQuadState());
   AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
 
   gfx::Rect quad_rect(content_bounds());
   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
   gfx::Rect visible_quad_rect(quad_rect);
   gfx::Rect visible_rect = frame_->visible_rect();
   gfx::Size coded_size = frame_->coded_size();
 
   // Pixels for macroblocked formats.
-  float tex_width_scale =
+  const float tex_width_scale =
       static_cast<float>(visible_rect.width()) / coded_size.width();
-  float tex_height_scale =
+  const float tex_height_scale =
       static_cast<float>(visible_rect.height()) / coded_size.height();
+  const float tex_x_offset =
+      static_cast<float>(visible_rect.x()) / coded_size.width();
+  const float tex_y_offset =
+      static_cast<float>(visible_rect.y()) / coded_size.height();
 
   switch (frame_resource_type_) {
     // TODO(danakj): Remove this, hide it in the hardware path.
     case VideoFrameExternalResources::SOFTWARE_RESOURCE: {
       DCHECK_EQ(frame_resources_.size(), 0u);
       DCHECK_EQ(software_resources_.size(), 1u);
       if (software_resources_.size() < 1u)
         break;
       bool premultiplied_alpha = true;
       gfx::PointF uv_top_left(0.f, 0.f);
@@ skipping 12 matching lines @@
                            SK_ColorTRANSPARENT,
                            opacity,
                            flipped);
       quad_sink->MaybeAppend(texture_quad.PassAs<DrawQuad>());
       break;
     }
     case VideoFrameExternalResources::YUV_RESOURCE: {
       DCHECK_GE(frame_resources_.size(), 3u);
       if (frame_resources_.size() < 3u)
         break;
-      gfx::SizeF tex_scale(tex_width_scale, tex_height_scale);
+      gfx::RectF tex_coord_rect(
+          tex_x_offset, tex_y_offset, tex_width_scale, tex_height_scale);
       scoped_ptr<YUVVideoDrawQuad> yuv_video_quad = YUVVideoDrawQuad::Create();
       yuv_video_quad->SetNew(
           shared_quad_state,
           quad_rect,
           opaque_rect,
           visible_quad_rect,
-          tex_scale,
+          tex_coord_rect,
           frame_resources_[0],
           frame_resources_[1],
           frame_resources_[2],
           frame_resources_.size() > 3 ? frame_resources_[3] : 0);
       quad_sink->MaybeAppend(yuv_video_quad.PassAs<DrawQuad>());
       break;
     }
     case VideoFrameExternalResources::RGB_RESOURCE: {
       DCHECK_EQ(frame_resources_.size(), 1u);
       if (frame_resources_.size() < 1u)
@@ skipping 116 matching lines @@
 void VideoLayerImpl::SetProviderClientImpl(
     scoped_refptr<VideoFrameProviderClientImpl> provider_client_impl) {
   provider_client_impl_ = provider_client_impl;
 }
 
 const char* VideoLayerImpl::LayerTypeAsString() const {
   return "cc::VideoLayerImpl";
 }
 
 }  // namespace cc