content/browser/compositor/gpu_browser_compositor_output_surface.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/compositor/gpu_browser_compositor_output_surface.h"
   6
   7 #include "cc/output/compositor_frame.h"
   8 #include "cc/output/output_surface_client.h"
   9 #include "content/browser/compositor/reflector_impl.h"
  10 #include "content/browser/renderer_host/render_widget_host_impl.h"
  11 #include "content/common/gpu/client/context_provider_command_buffer.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "gpu/command_buffer/client/context_support.h"
  14 #include "gpu/command_buffer/client/gles2_interface.h"
  15
  16 namespace content {
  17
  18 GpuBrowserCompositorOutputSurface::GpuBrowserCompositorOutputSurface(
  19     const scoped_refptr<ContextProviderCommandBuffer>& context,
  20     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
  21     scoped_ptr<cc::OverlayCandidateValidator> overlay_candidate_validator)
  22     : BrowserCompositorOutputSurface(context,
  23                                      vsync_manager),
  24 #if defined(OS_MACOSX)
  25       should_not_show_frames_(false),
  26 #endif
  27       swap_buffers_completion_callback_(
  28           base::Bind(&GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted,
  29                      base::Unretained(this))),
  30       update_vsync_parameters_callback_(base::Bind(
  31           &BrowserCompositorOutputSurface::OnUpdateVSyncParametersFromGpu,
  32           base::Unretained(this))) {
  33   overlay_candidate_validator_ = overlay_candidate_validator.Pass();
  34 }
  35
  36 GpuBrowserCompositorOutputSurface::~GpuBrowserCompositorOutputSurface() {}
  37
  38 CommandBufferProxyImpl*
  39 GpuBrowserCompositorOutputSurface::GetCommandBufferProxy() {
  40   ContextProviderCommandBuffer* provider_command_buffer =
  41       static_cast<content::ContextProviderCommandBuffer*>(
  42           context_provider_.get());
  43   CommandBufferProxyImpl* command_buffer_proxy =
  44       provider_command_buffer->GetCommandBufferProxy();
  45   DCHECK(command_buffer_proxy);
  46   return command_buffer_proxy;
  47 }
  48
  49 bool GpuBrowserCompositorOutputSurface::BindToClient(
  50     cc::OutputSurfaceClient* client) {
  51   if (!BrowserCompositorOutputSurface::BindToClient(client))
  52     return false;
  53
  54   GetCommandBufferProxy()->SetSwapBuffersCompletionCallback(
  55       swap_buffers_completion_callback_.callback());
  56   GetCommandBufferProxy()->SetUpdateVSyncParametersCallback(
  57       update_vsync_parameters_callback_.callback());
  58   return true;
  59 }
  60
  61 void GpuBrowserCompositorOutputSurface::SwapBuffers(
  62     cc::CompositorFrame* frame) {
  63   DCHECK(frame->gl_frame_data);
  64
  65   GetCommandBufferProxy()->SetLatencyInfo(frame->metadata.latency_info);
  66
  67   if (reflector_) {
  68     if (frame->gl_frame_data->sub_buffer_rect ==
  69         gfx::Rect(frame->gl_frame_data->size))
  70       reflector_->OnSourceSwapBuffers();
  71     else
  72       reflector_->OnSourcePostSubBuffer(frame->gl_frame_data->sub_buffer_rect);
  73   }
  74
  75   if (frame->gl_frame_data->sub_buffer_rect ==
  76       gfx::Rect(frame->gl_frame_data->size)) {
  77     context_provider_->ContextSupport()->Swap();
  78   } else {
  79     context_provider_->ContextSupport()->PartialSwapBuffers(
  80         frame->gl_frame_data->sub_buffer_rect);
  81   }
  82
  83   client_->DidSwapBuffers();
  84
  85 #if defined(OS_MACOSX)
  86   if (should_not_show_frames_)
  87     should_not_show_frames_ = false;
  88 #endif
  89 }
  90
  91 void GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted(
  92     const std::vector<ui::LatencyInfo>& latency_info) {
  93 #if defined(OS_MACOSX)
  94   // On Mac, delay acknowledging the swap to the output surface client until
  95   // it has been drawn, see OnSurfaceDisplayed();
  96   NOTREACHED();
  97 #else
  98   if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  99     RenderWidgetHostImpl::CompositorFrameDrawn(latency_info);
 100   } else {
 101     BrowserThread::PostTask(
 102         BrowserThread::UI,
 103         FROM_HERE,
 104         base::Bind(&RenderWidgetHostImpl::CompositorFrameDrawn, latency_info));
 105   }
 106   OnSwapBuffersComplete();
 107 #endif
 108 }
 109
 110 #if defined(OS_MACOSX)
 111 void GpuBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
 112   cc::OutputSurface::OnSwapBuffersComplete();
 113 }
 114
 115 void GpuBrowserCompositorOutputSurface::OnSurfaceRecycled() {
 116   // Discard the backbuffer immediately. This is necessary only when using a
 117   // ImageTransportSurfaceFBO with a CALayerStorageProvider. Discarding the
 118   // backbuffer results in the next frame using a new CALayer and CAContext,
 119   // which guarantees that the browser will not flash stale content when adding
 120   // the remote CALayer to the NSView hierarchy (it could flash stale content
 121   // because the system window server is not synchronized with any signals we
 122   // control or observe).
 123   DiscardBackbuffer();
 124   // It may be that there are frames in-flight from the GPU process back to the
 125   // browser. Make sure that these frames are not displayed by ignoring them in
 126   // GpuProcessHostUIShim, until the browser issues a SwapBuffers for the new
 127   // content.
 128   should_not_show_frames_ = true;
 129 }
 130
 131 bool GpuBrowserCompositorOutputSurface::ShouldNotShowFramesAfterRecycle()
 132     const {
 133   return should_not_show_frames_;
 134 }
 135 #endif
 136
 137 }  // namespace content