Support for drawing a debug border around animated layers

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #if defined(OS_ANDROID)
@@ skipping 163 matching lines @@
   settings.background_color_instead_of_checkerboard =
       cmd->HasSwitch(cc::switches::kBackgroundColorInsteadOfCheckerboard);
   settings.show_overdraw_in_tracing =
       cmd->HasSwitch(cc::switches::kTraceOverdraw);
   settings.can_use_lcd_text = cc::switches::IsLCDTextEnabled();
   settings.use_pinch_virtual_viewport =
       cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport);
   settings.allow_antialiasing &=
       !cmd->HasSwitch(cc::switches::kDisableCompositedAntialiasing);
 
   // These flags should be mirrored by UI versions in ui/compositor/.

[Ken Russell (switch to Gerrit), 2013/12/09 19:19:14]

Nit: I don't see any changes to ui/compositor/ in this patch. Should there be?

[avallee, 2013/12/09 21:30:26]

Our bounds are in window space for now. This means that when a window animated
its bounds are just the window bounds, not the total screen space bounds. I'll
disable the drawing in the ui compositor for now.

[danakj, 2013/12/09 21:43:52]

What this comment means is these flags should be possible to have --ui-same-flag
to enable it in the UI compositor so you can use it with ui compositor
animations, the same way that you would with renderer animations. Each
compositor can display these boxes independently of the other. They each have
their own notion of screen space.

[avallee, 2013/12/09 21:48:05]

Done.

+  settings.initial_debug_state.show_layer_animation_bounds_rects =
+      cmd->HasSwitch(cc::switches::kShowLayerAnimationBounds);
   settings.initial_debug_state.show_debug_borders =
       cmd->HasSwitch(cc::switches::kShowCompositedLayerBorders);
   settings.initial_debug_state.show_fps_counter =
       cmd->HasSwitch(cc::switches::kShowFPSCounter);
   settings.initial_debug_state.show_paint_rects =
       cmd->HasSwitch(switches::kShowPaintRects);
   settings.initial_debug_state.show_property_changed_rects =
       cmd->HasSwitch(cc::switches::kShowPropertyChangedRects);
   settings.initial_debug_state.show_surface_damage_rects =
       cmd->HasSwitch(cc::switches::kShowSurfaceDamageRects);
@@ skipping 440 matching lines @@
   widget_->OnSwapBuffersAborted();
 }
 
 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->Context3d()->rateLimitOffscreenContextCHROMIUM();
 }
 
 }  // namespace content