Subrect snapshot support.

content/browser/renderer_host/render_widget_host_view_android.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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 113 matching lines @@
 }
 
 void RenderWidgetHostViewAndroid::SetBounds(const gfx::Rect& rect) {
   if (rect.origin().x() || rect.origin().y()) {
     VLOG(0) << "SetBounds not implemented for (x,y)!=(0,0)";
   }
   SetSize(rect.size());
 }
 
 WebKit::WebGLId RenderWidgetHostViewAndroid::GetScaledContentTexture(
-    const gfx::Size& size) {
+    const gfx::Size& size,
+    const gfx::Rect& src_rect) {
   if (!CompositorImpl::IsInitialized() ||
       texture_id_in_layer_ == 0 ||
       texture_size_in_layer_.IsEmpty())
     return 0;
 
+  // Intersect the rects to make sure we aren't trying to grab area from
+  // outside the texture area.
+  gfx::Rect intersected_rect(gfx::IntersectRects(
+      src_rect,
+      gfx::Rect(texture_size_in_layer_)));
+
   GLHelper* helper = ImageTransportFactoryAndroid::GetInstance()->GetGLHelper();
   return helper->CopyAndScaleTexture(texture_id_in_layer_,
                                      texture_size_in_layer_,
+                                     intersected_rect,
                                      size,
                                      true);
 }
 
 bool RenderWidgetHostViewAndroid::PopulateBitmapWithContents(jobject jbitmap) {
   if (!CompositorImpl::IsInitialized() ||
       texture_id_in_layer_ == 0 ||
       texture_size_in_layer_.IsEmpty())
     return false;
 
   gfx::JavaBitmap bitmap(jbitmap);
 
   // TODO(dtrainor): Eventually add support for multiple formats here.
   DCHECK(bitmap.format() == ANDROID_BITMAP_FORMAT_RGBA_8888);
 
   GLHelper* helper = ImageTransportFactoryAndroid::GetInstance()->GetGLHelper();
 
-  WebKit::WebGLId texture = helper->CopyAndScaleTexture(texture_id_in_layer_,
-                                                        texture_size_in_layer_,
-                                                        bitmap.size(),
-                                                        true);
+  WebKit::WebGLId texture = helper->CopyAndScaleTexture(
+      texture_id_in_layer_,
+      texture_size_in_layer_,
+      gfx::Rect(texture_size_in_layer_),
+      bitmap.size(),
+      true);
   if (texture == 0)
     return false;
 
   helper->ReadbackTextureSync(texture,
                               bitmap.size(),
                               static_cast<unsigned char*> (bitmap.pixels()));
 
   WebKit::WebGraphicsContext3D* context =
       ImageTransportFactoryAndroid::GetInstance()->GetContext3D();
   context->deleteTexture(texture);
@@ skipping 456 matching lines @@
 // RenderWidgetHostView, public:
 
 // static
 RenderWidgetHostView*
 RenderWidgetHostView::CreateViewForWidget(RenderWidgetHost* widget) {
   RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(widget);
   return new RenderWidgetHostViewAndroid(rwhi, NULL);
 }
 
 } // namespace content