Convert the sub-rectangle for GL functions from the views coordinate to the OpenGL coordinate.

BUG=118571


Review URL: https://chromiumcodereview.appspot.com/10826054

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148882 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/render_widget_host_view_aura.cc

@@ -510,7 +510,13 @@ void RenderWidgetHostViewAura::CopyFromCompositingSurface(
       AsWeakPtr(),
       callback);
   pending_thumbnail_tasks_.push_back(callback);
-  gfx::Rect src_subrect_in_pixel = ConvertRectToPixel(this, src_subrect);
+
+  // Convert |src_subrect| from the views coordinate (upper-left origin) into
+  // the OpenGL coordinate (lower-left origin).
+  gfx::Rect src_subrect_in_gl = src_subrect;
+  src_subrect_in_gl.set_y(GetViewBounds().height() - src_subrect.bottom());
+
+  gfx::Rect src_subrect_in_pixel = ConvertRectToPixel(this, src_subrect_in_gl);
   gl_helper->CopyTextureTo(container->texture_id(),
                            container->size(),
                            src_subrect_in_pixel,

content/browser/renderer_host/render_widget_host_view_mac.mm

@@ -832,10 +832,14 @@ void RenderWidgetHostViewMac::CopyFromCompositingSurface(
       dst_pixel_size.width(), dst_pixel_size.height(), true))
     return;
 
-  gfx::Rect src_pixel_subrect(src_subrect.origin().Scale(scale),
-                              src_subrect.size().Scale(scale));
+  // Convert |src_subrect| from the views coordinate (upper-left origin) into
+  // the OpenGL coordinate (lower-left origin).
+  gfx::Rect src_gl_subrect = src_subrect;
+  src_gl_subrect.set_y(GetViewBounds().height() - src_subrect.bottom());
+
+  gfx::Rect src_pixel_gl_subrect = src_gl_subrect.Scale(scale);
   const bool result = compositing_iosurface_->CopyTo(
-      src_pixel_subrect,
+      src_pixel_gl_subrect,
       dst_pixel_size,
       output->getTopDevice()->accessBitmap(true).getPixels());
   scoped_callback_runner.Release();