OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/renderer/render_widget.h" | 5 #include "content/renderer/render_widget.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/command_line.h" | 8 #include "base/command_line.h" |
9 #include "base/debug/trace_event.h" | 9 #include "base/debug/trace_event.h" |
10 #include "base/debug/trace_event_synthetic_delay.h" | 10 #include "base/debug/trace_event_synthetic_delay.h" |
(...skipping 890 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
901 | 901 |
902 scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(bool fallback) { | 902 scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(bool fallback) { |
903 | 903 |
904 #if defined(OS_ANDROID) | 904 #if defined(OS_ANDROID) |
905 if (SynchronousCompositorFactory* factory = | 905 if (SynchronousCompositorFactory* factory = |
906 SynchronousCompositorFactory::GetInstance()) { | 906 SynchronousCompositorFactory::GetInstance()) { |
907 return factory->CreateOutputSurface(routing_id()); | 907 return factory->CreateOutputSurface(routing_id()); |
908 } | 908 } |
909 #endif | 909 #endif |
910 | 910 |
911 // Explicitly disable antialiasing for the compositor. As of the time of | 911 const CommandLine& command_line = *CommandLine::ForCurrentProcess(); |
912 // this writing, the only platform that supported antialiasing for the | 912 bool use_software = fallback; |
913 // compositor was Mac OS X, because the on-screen OpenGL context creation | 913 if (command_line.HasSwitch(switches::kDisableGpuCompositing)) |
914 // code paths on Windows and Linux didn't yet have multisampling support. | 914 use_software = true; |
915 // Mac OS X essentially always behaves as though it's rendering offscreen. | |
916 // Multisampling has a heavy cost especially on devices with relatively low | |
917 // fill rate like most notebooks, and the Mac implementation would need to | |
918 // be optimized to resolve directly into the IOSurface shared between the | |
919 // GPU and browser processes. For these reasons and to avoid platform | |
920 // disparities we explicitly disable antialiasing. | |
921 blink::WebGraphicsContext3D::Attributes attributes; | |
922 attributes.antialias = false; | |
923 attributes.shareResources = true; | |
924 attributes.noAutomaticFlushes = true; | |
925 attributes.depth = false; | |
926 attributes.stencil = false; | |
927 | 915 |
928 const CommandLine& command_line = *CommandLine::ForCurrentProcess(); | |
929 scoped_refptr<ContextProviderCommandBuffer> context_provider; | 916 scoped_refptr<ContextProviderCommandBuffer> context_provider; |
930 if (!fallback) { | 917 if (!use_software) { |
| 918 // Explicitly disable antialiasing for the compositor. As of the time of |
| 919 // this writing, the only platform that supported antialiasing for the |
| 920 // compositor was Mac OS X, because the on-screen OpenGL context creation |
| 921 // code paths on Windows and Linux didn't yet have multisampling support. |
| 922 // Mac OS X essentially always behaves as though it's rendering offscreen. |
| 923 // Multisampling has a heavy cost especially on devices with relatively low |
| 924 // fill rate like most notebooks, and the Mac implementation would need to |
| 925 // be optimized to resolve directly into the IOSurface shared between the |
| 926 // GPU and browser processes. For these reasons and to avoid platform |
| 927 // disparities we explicitly disable antialiasing. |
| 928 blink::WebGraphicsContext3D::Attributes attributes; |
| 929 attributes.antialias = false; |
| 930 attributes.shareResources = true; |
| 931 attributes.noAutomaticFlushes = true; |
| 932 attributes.depth = false; |
| 933 attributes.stencil = false; |
931 context_provider = ContextProviderCommandBuffer::Create( | 934 context_provider = ContextProviderCommandBuffer::Create( |
932 CreateGraphicsContext3D(attributes), | 935 CreateGraphicsContext3D(attributes), |
933 "RenderCompositor"); | 936 "RenderCompositor"); |
| 937 if (!context_provider.get()) { |
| 938 // Cause the compositor to wait and try again. |
| 939 return scoped_ptr<cc::OutputSurface>(); |
| 940 } |
934 } | 941 } |
935 | 942 |
936 uint32 output_surface_id = next_output_surface_id_++; | 943 uint32 output_surface_id = next_output_surface_id_++; |
937 if (command_line.HasSwitch(switches::kEnableDelegatedRenderer) && | 944 if (command_line.HasSwitch(switches::kEnableDelegatedRenderer) && |
938 !command_line.HasSwitch(switches::kDisableDelegatedRenderer)) { | 945 !command_line.HasSwitch(switches::kDisableDelegatedRenderer)) { |
939 DCHECK(is_threaded_compositing_enabled_); | 946 DCHECK(is_threaded_compositing_enabled_); |
940 return scoped_ptr<cc::OutputSurface>( | 947 return scoped_ptr<cc::OutputSurface>( |
941 new DelegatedCompositorOutputSurface( | 948 new DelegatedCompositorOutputSurface( |
942 routing_id(), | 949 routing_id(), |
943 output_surface_id, | 950 output_surface_id, |
(...skipping 1918 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
2862 | 2869 |
2863 void RenderWidget::RegisterSwappedOutChildFrame(RenderFrameImpl* frame) { | 2870 void RenderWidget::RegisterSwappedOutChildFrame(RenderFrameImpl* frame) { |
2864 swapped_out_frames_.AddObserver(frame); | 2871 swapped_out_frames_.AddObserver(frame); |
2865 } | 2872 } |
2866 | 2873 |
2867 void RenderWidget::UnregisterSwappedOutChildFrame(RenderFrameImpl* frame) { | 2874 void RenderWidget::UnregisterSwappedOutChildFrame(RenderFrameImpl* frame) { |
2868 swapped_out_frames_.RemoveObserver(frame); | 2875 swapped_out_frames_.RemoveObserver(frame); |
2869 } | 2876 } |
2870 | 2877 |
2871 } // namespace content | 2878 } // namespace content |
OLD | NEW |