diff options
Diffstat (limited to 'chromium/content/browser/renderer_host/render_widget_helper_mac.mm')
-rw-r--r-- | chromium/content/browser/renderer_host/render_widget_helper_mac.mm | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/chromium/content/browser/renderer_host/render_widget_helper_mac.mm b/chromium/content/browser/renderer_host/render_widget_helper_mac.mm new file mode 100644 index 00000000000..824b2265d70 --- /dev/null +++ b/chromium/content/browser/renderer_host/render_widget_helper_mac.mm @@ -0,0 +1,64 @@ +// 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/renderer_host/render_widget_helper.h" + +#import <Cocoa/Cocoa.h> +#include <IOSurface/IOSurfaceAPI.h> + +#include "base/bind.h" +#include "content/browser/compositor/browser_compositor_view_mac.h" +#include "content/browser/gpu/gpu_process_host.h" +#include "content/browser/gpu/gpu_surface_tracker.h" +#include "content/common/gpu/gpu_messages.h" + +namespace { + +void OnNativeSurfaceBuffersSwappedOnUIThread( + base::ScopedCFTypeRef<IOSurfaceRef> io_surface, + const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params) { + DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); + gfx::AcceleratedWidget native_widget = + content::GpuSurfaceTracker::Get()->AcquireNativeWidget(params.surface_id); + IOSurfaceID io_surface_handle = static_cast<IOSurfaceID>( + params.surface_handle); + [native_widget gotAcceleratedIOSurfaceFrame:io_surface_handle + withOutputSurfaceID:params.surface_id + withPixelSize:params.size + withScaleFactor:params.scale_factor]; +} + +} // namespace + +namespace content { + +void RenderWidgetHelper::OnNativeSurfaceBuffersSwappedOnIOThread( + GpuProcessHost* gpu_process_host, + const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params) { + DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); + + // Immediately acknowledge this frame on the IO thread instead of the UI + // thread. The UI thread will wait on the GPU process. If the UI thread + // were to be responsible for acking swaps, then there would be a cycle + // and a potential deadlock. + // TODO(ccameron): This immediate ack circumvents GPU back-pressure that + // is necessary to throttle renderers. Fix that. + AcceleratedSurfaceMsg_BufferPresented_Params ack_params; + ack_params.sync_point = 0; + ack_params.renderer_id = 0; + gpu_process_host->Send(new AcceleratedSurfaceMsg_BufferPresented( + params.route_id, ack_params)); + + // Open the IOSurface handle before returning, to ensure that it is not + // closed as soon as the frame is acknowledged. + base::ScopedCFTypeRef<IOSurfaceRef> io_surface(IOSurfaceLookup( + static_cast<uint32>(params.surface_handle))); + + BrowserThread::PostTask( + BrowserThread::UI, + FROM_HERE, + base::Bind(&OnNativeSurfaceBuffersSwappedOnUIThread, io_surface, params)); +} + +} // namespace content |