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/browser_compositor_overlay_candidate_validator.h"
  10 #include "content/browser/compositor/reflector_impl.h"
  11 #include "content/browser/compositor/reflector_texture.h"
  12 #include "content/browser/renderer_host/render_widget_host_impl.h"
  13 #include "content/common/gpu/client/context_provider_command_buffer.h"
  14 #include "gpu/command_buffer/client/context_support.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<BrowserCompositorOverlayCandidateValidator>
  22         overlay_candidate_validator)
  23     : BrowserCompositorOutputSurface(context,
  24                                      vsync_manager,
  25                                      overlay_candidate_validator.Pass()),
  26 #if defined(OS_MACOSX)
  27       should_show_frames_state_(SHOULD_SHOW_FRAMES),
  28 #endif
  29       swap_buffers_completion_callback_(
  30           base::Bind(&GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted,
  31                      base::Unretained(this))),
  32       update_vsync_parameters_callback_(base::Bind(
  33           &BrowserCompositorOutputSurface::OnUpdateVSyncParametersFromGpu,
  34           base::Unretained(this))) {
  35 }
  36
  37 GpuBrowserCompositorOutputSurface::~GpuBrowserCompositorOutputSurface() {}
  38
  39 CommandBufferProxyImpl*
  40 GpuBrowserCompositorOutputSurface::GetCommandBufferProxy() {
  41   ContextProviderCommandBuffer* provider_command_buffer =
  42       static_cast<content::ContextProviderCommandBuffer*>(
  43           context_provider_.get());
  44   CommandBufferProxyImpl* command_buffer_proxy =
  45       provider_command_buffer->GetCommandBufferProxy();
  46   DCHECK(command_buffer_proxy);
  47   return command_buffer_proxy;
  48 }
  49
  50 bool GpuBrowserCompositorOutputSurface::BindToClient(
  51     cc::OutputSurfaceClient* client) {
  52   if (!BrowserCompositorOutputSurface::BindToClient(client))
  53     return false;
  54
  55   GetCommandBufferProxy()->SetSwapBuffersCompletionCallback(
  56       swap_buffers_completion_callback_.callback());
  57   GetCommandBufferProxy()->SetUpdateVSyncParametersCallback(
  58       update_vsync_parameters_callback_.callback());
  59   return true;
  60 }
  61
  62 void GpuBrowserCompositorOutputSurface::OnReflectorChanged() {
  63   if (!reflector_) {
  64     reflector_texture_.reset();
  65   } else {
  66     reflector_texture_.reset(new ReflectorTexture(context_provider()));
  67     reflector_->OnSourceTextureMailboxUpdated(reflector_texture_->mailbox());
  68   }
  69 }
  70
  71 void GpuBrowserCompositorOutputSurface::SwapBuffers(
  72     cc::CompositorFrame* frame) {
  73   DCHECK(frame->gl_frame_data);
  74
  75   GetCommandBufferProxy()->SetLatencyInfo(frame->metadata.latency_info);
  76
  77   if (reflector_) {
  78     if (frame->gl_frame_data->sub_buffer_rect ==
  79         gfx::Rect(frame->gl_frame_data->size)) {
  80       reflector_texture_->CopyTextureFullImage(SurfaceSize());
  81       reflector_->OnSourceSwapBuffers();
  82     } else {
  83       const gfx::Rect& rect = frame->gl_frame_data->sub_buffer_rect;
  84       reflector_texture_->CopyTextureSubImage(rect);
  85       reflector_->OnSourcePostSubBuffer(rect);
  86     }
  87   }
  88
  89   if (frame->gl_frame_data->sub_buffer_rect ==
  90       gfx::Rect(frame->gl_frame_data->size)) {
  91     context_provider_->ContextSupport()->Swap();
  92   } else {
  93     context_provider_->ContextSupport()->PartialSwapBuffers(
  94         frame->gl_frame_data->sub_buffer_rect);
  95   }
  96
  97   client_->DidSwapBuffers();
  98
  99 #if defined(OS_MACOSX)
 100   if (should_show_frames_state_ ==
 101       SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED) {
 102     should_show_frames_state_ = SHOULD_SHOW_FRAMES;
 103   }
 104 #endif
 105 }
 106
 107 void GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted(
 108     const std::vector<ui::LatencyInfo>& latency_info,
 109     gfx::SwapResult result) {
 110 #if defined(OS_MACOSX)
 111   // On Mac, delay acknowledging the swap to the output surface client until
 112   // it has been drawn, see OnSurfaceDisplayed();
 113   NOTREACHED();
 114 #else
 115   RenderWidgetHostImpl::CompositorFrameDrawn(latency_info);
 116   OnSwapBuffersComplete();
 117 #endif
 118 }
 119
 120 #if defined(OS_MACOSX)
 121 void GpuBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
 122   cc::OutputSurface::OnSwapBuffersComplete();
 123 }
 124
 125 void GpuBrowserCompositorOutputSurface::SetSurfaceSuspendedForRecycle(
 126     bool suspended) {
 127   if (suspended) {
 128     // It may be that there are frames in-flight from the GPU process back to
 129     // the browser. Make sure that these frames are not displayed by ignoring
 130     // them in GpuProcessHostUIShim, until the browser issues a SwapBuffers for
 131     // the new content.
 132     should_show_frames_state_ = SHOULD_NOT_SHOW_FRAMES_SUSPENDED;
 133   } else {
 134     // Discard the backbuffer before drawing the new frame. This is necessary
 135     // only when using a ImageTransportSurfaceFBO with a
 136     // CALayerStorageProvider. Discarding the backbuffer results in the next
 137     // frame using a new CALayer and CAContext, which guarantees that the
 138     // browser will not flash stale content when adding the remote CALayer to
 139     // the NSView hierarchy (it could flash stale content because the system
 140     // window server is not synchronized with any signals we control or
 141     // observe).
 142     if (should_show_frames_state_ == SHOULD_NOT_SHOW_FRAMES_SUSPENDED) {
 143       DiscardBackbuffer();
 144       should_show_frames_state_ =
 145           SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED;
 146     }
 147   }
 148 }
 149
 150 bool GpuBrowserCompositorOutputSurface::
 151     SurfaceShouldNotShowFramesAfterSuspendForRecycle() const {
 152   return should_show_frames_state_ != SHOULD_SHOW_FRAMES;
 153 }
 154 #endif
 155
 156 }  // namespace content