cc: Implement overdraw feedback debugging feature.

services/ui/surfaces/display_output_surface_ozone.cc

 // Copyright 2016 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 "services/ui/surfaces/display_output_surface_ozone.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 22 matching lines @@
                  context_provider->ContextSupport()),
       synthetic_begin_frame_source_(synthetic_begin_frame_source),
       weak_ptr_factory_(this) {
   buffer_queue_.reset(
       new BufferQueue(context_provider->ContextGL(), target, internalformat,
                       display::DisplaySnapshot::PrimaryFormat(), &gl_helper_,
                       gpu_memory_buffer_manager, widget));
 
   capabilities_.uses_default_gl_framebuffer = false;
   capabilities_.flipped_output_surface = true;
+  capabilities_.supports_stencil = true;
   // Set |max_frames_pending| to 2 for surfaceless, which aligns scheduling
   // more closely with the previous surfaced behavior.
   // With a surface, swap buffer ack used to return early, before actually
   // presenting the back buffer, enabling the browser compositor to run ahead.
   // Surfaceless implementation acks at the time of actual buffer swap, which
   // shifts the start of the new frame forward relative to the old
   // implementation.
   capabilities_.max_frames_pending = 2;
 
   buffer_queue_->Initialize();
@@ skipping 29 matching lines @@
 
 // We call this on every frame that a value changes, but changing the size once
 // we've allocated backing NativePixmapOzone instances will cause a DCHECK
 // because Chrome never Reshape(s) after the first one from (0,0). NB: this
 // implies that screen size changes need to be plumbed differently. In
 // particular, we must create the native window in the size that the hardware
 // reports.
 void DisplayOutputSurfaceOzone::Reshape(const gfx::Size& size,
                                         float device_scale_factor,
                                         const gfx::ColorSpace& color_space,
-                                        bool has_alpha) {
+                                        bool has_alpha,
+                                        bool use_stencil) {
   reshape_size_ = size;
   context_provider()->ContextGL()->ResizeCHROMIUM(
       size.width(), size.height(), device_scale_factor, has_alpha);
-  buffer_queue_->Reshape(size, device_scale_factor, color_space);
+  buffer_queue_->Reshape(size, device_scale_factor, color_space, use_stencil);
 }
 
 void DisplayOutputSurfaceOzone::SwapBuffers(cc::OutputSurfaceFrame frame) {
   DCHECK(buffer_queue_);
 
   // TODO(rjkroege): What if swap happens again before OnGpuSwapBuffersCompleted
   // then it would see the wrong size?
   DCHECK(reshape_size_ == frame.size);
   swap_size_ = reshape_size_;
 
@@ skipping 59 matching lines @@
 void DisplayOutputSurfaceOzone::OnVSyncParametersUpdated(
     base::TimeTicks timebase,
     base::TimeDelta interval) {
   // TODO(brianderson): We should not be receiving 0 intervals.
   synthetic_begin_frame_source_->OnUpdateVSyncParameters(
       timebase,
       interval.is_zero() ? cc::BeginFrameArgs::DefaultInterval() : interval);
 }
 
 }  // namespace ui