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// Copyright 2014 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/browser/compositor/gpu_browser_compositor_output_surface.h"
#include "cc/output/compositor_frame.h"
#include "cc/output/output_surface_client.h"
#include "content/browser/compositor/reflector_impl.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/common/gpu/client/context_provider_command_buffer.h"
#include "content/public/browser/browser_thread.h"
#include "gpu/command_buffer/client/context_support.h"
#include "gpu/command_buffer/client/gles2_interface.h"
namespace content {
GpuBrowserCompositorOutputSurface::GpuBrowserCompositorOutputSurface(
const scoped_refptr<ContextProviderCommandBuffer>& context,
int surface_id,
IDMap<BrowserCompositorOutputSurface>* output_surface_map,
const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
scoped_ptr<cc::OverlayCandidateValidator> overlay_candidate_validator)
: BrowserCompositorOutputSurface(context,
surface_id,
output_surface_map,
vsync_manager),
#if defined(OS_MACOSX)
should_not_show_frames_(false),
#endif
swap_buffers_completion_callback_(
base::Bind(&GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted,
base::Unretained(this))) {
overlay_candidate_validator_ = overlay_candidate_validator.Pass();
}
GpuBrowserCompositorOutputSurface::~GpuBrowserCompositorOutputSurface() {}
CommandBufferProxyImpl*
GpuBrowserCompositorOutputSurface::GetCommandBufferProxy() {
ContextProviderCommandBuffer* provider_command_buffer =
static_cast<content::ContextProviderCommandBuffer*>(
context_provider_.get());
CommandBufferProxyImpl* command_buffer_proxy =
provider_command_buffer->GetCommandBufferProxy();
DCHECK(command_buffer_proxy);
return command_buffer_proxy;
}
bool GpuBrowserCompositorOutputSurface::BindToClient(
cc::OutputSurfaceClient* client) {
if (!BrowserCompositorOutputSurface::BindToClient(client))
return false;
GetCommandBufferProxy()->SetSwapBuffersCompletionCallback(
swap_buffers_completion_callback_.callback());
return true;
}
void GpuBrowserCompositorOutputSurface::SwapBuffers(
cc::CompositorFrame* frame) {
DCHECK(frame->gl_frame_data);
GetCommandBufferProxy()->SetLatencyInfo(frame->metadata.latency_info);
if (reflector_.get()) {
if (frame->gl_frame_data->sub_buffer_rect ==
gfx::Rect(frame->gl_frame_data->size))
reflector_->OnSwapBuffers();
else
reflector_->OnPostSubBuffer(frame->gl_frame_data->sub_buffer_rect);
}
if (frame->gl_frame_data->sub_buffer_rect ==
gfx::Rect(frame->gl_frame_data->size)) {
context_provider_->ContextSupport()->Swap();
} else {
context_provider_->ContextSupport()->PartialSwapBuffers(
frame->gl_frame_data->sub_buffer_rect);
}
client_->DidSwapBuffers();
#if defined(OS_MACOSX)
if (should_not_show_frames_)
should_not_show_frames_ = false;
#endif
}
void GpuBrowserCompositorOutputSurface::OnSwapBuffersCompleted(
const std::vector<ui::LatencyInfo>& latency_info) {
#if defined(OS_MACOSX)
// On Mac, delay acknowledging the swap to the output surface client until
// it has been drawn, see OnSurfaceDisplayed();
NOTREACHED();
#else
if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
RenderWidgetHostImpl::CompositorFrameDrawn(latency_info);
} else {
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&RenderWidgetHostImpl::CompositorFrameDrawn, latency_info));
}
OnSwapBuffersComplete();
#endif
}
#if defined(OS_MACOSX)
void GpuBrowserCompositorOutputSurface::OnSurfaceDisplayed() {
cc::OutputSurface::OnSwapBuffersComplete();
}
void GpuBrowserCompositorOutputSurface::OnSurfaceRecycled() {
// Discard the backbuffer immediately. This is necessary only when using a
// ImageTransportSurfaceFBO with a CALayerStorageProvider. Discarding the
// backbuffer results in the next frame using a new CALayer and CAContext,
// which guarantees that the browser will not flash stale content when adding
// the remote CALayer to the NSView hierarchy (it could flash stale content
// because the system window server is not synchronized with any signals we
// control or observe).
DiscardBackbuffer();
// It may be that there are frames in-flight from the GPU process back to the
// browser. Make sure that these frames are not displayed by ignoring them in
// GpuProcessHostUIShim, until the browser issues a SwapBuffers for the new
// content.
should_not_show_frames_ = true;
}
bool GpuBrowserCompositorOutputSurface::ShouldNotShowFramesAfterRecycle()
const {
return should_not_show_frames_;
}
#endif
} // namespace content
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