Merge 261120 "gpu: Lose context when BeginQueryEXT fails to allo..."

content/renderer/render_widget.cc

 // Copyright (c) 2012 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/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/debug/trace_event_synthetic_delay.h"
@@ skipping 901 matching lines @@
   }
 #endif
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   bool use_software = fallback;
   if (command_line.HasSwitch(switches::kDisableGpuCompositing))
     use_software = true;
 
   scoped_refptr<ContextProviderCommandBuffer> context_provider;
   if (!use_software) {
-    // Explicitly disable antialiasing for the compositor. As of the time of
-    // this writing, the only platform that supported antialiasing for the
-    // compositor was Mac OS X, because the on-screen OpenGL context creation
-    // code paths on Windows and Linux didn't yet have multisampling support.
-    // Mac OS X essentially always behaves as though it's rendering offscreen.
-    // Multisampling has a heavy cost especially on devices with relatively low
-    // fill rate like most notebooks, and the Mac implementation would need to
-    // be optimized to resolve directly into the IOSurface shared between the
-    // GPU and browser processes. For these reasons and to avoid platform
-    // disparities we explicitly disable antialiasing.
-    blink::WebGraphicsContext3D::Attributes attributes;
-    attributes.antialias = false;
-    attributes.shareResources = true;
-    attributes.noAutomaticFlushes = true;
-    attributes.depth = false;
-    attributes.stencil = false;
     context_provider = ContextProviderCommandBuffer::Create(
-        CreateGraphicsContext3D(attributes),
-        "RenderCompositor");
+        CreateGraphicsContext3D(), "RenderCompositor");
     if (!context_provider.get()) {
       // Cause the compositor to wait and try again.
       return scoped_ptr<cc::OutputSurface>();
     }
   }
 
   uint32 output_surface_id = next_output_surface_id_++;
   if (command_line.HasSwitch(switches::kEnableDelegatedRenderer) &&
       !command_line.HasSwitch(switches::kDisableDelegatedRenderer)) {
     DCHECK(is_threaded_compositing_enabled_);
@@ skipping 1880 matching lines @@
 #if defined(OS_ANDROID)
 void RenderWidget::UpdateSelectionRootBounds() {
 }
 #endif
 
 bool RenderWidget::HasTouchEventHandlersAt(const gfx::Point& point) const {
   return true;
 }
 
 scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
-RenderWidget::CreateGraphicsContext3D(
-    const blink::WebGraphicsContext3D::Attributes& attributes) {
+RenderWidget::CreateGraphicsContext3D() {
   if (!webwidget_)
     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableGpuCompositing))
     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
   if (!RenderThreadImpl::current())
     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
   CauseForGpuLaunch cause =
       CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE;
   scoped_refptr<GpuChannelHost> gpu_channel_host(
       RenderThreadImpl::current()->EstablishGpuChannelSync(cause));
   if (!gpu_channel_host)
     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
 
+  // Explicitly disable antialiasing for the compositor. As of the time of
+  // this writing, the only platform that supported antialiasing for the
+  // compositor was Mac OS X, because the on-screen OpenGL context creation
+  // code paths on Windows and Linux didn't yet have multisampling support.
+  // Mac OS X essentially always behaves as though it's rendering offscreen.
+  // Multisampling has a heavy cost especially on devices with relatively low
+  // fill rate like most notebooks, and the Mac implementation would need to
+  // be optimized to resolve directly into the IOSurface shared between the
+  // GPU and browser processes. For these reasons and to avoid platform
+  // disparities we explicitly disable antialiasing.
+  blink::WebGraphicsContext3D::Attributes attributes;
+  attributes.antialias = false;
+  attributes.shareResources = true;
+  attributes.noAutomaticFlushes = true;
+  attributes.depth = false;
+  attributes.stencil = false;
+  bool bind_generates_resources = false;
+  bool lose_context_when_out_of_memory = true;
   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
 #if defined(OS_ANDROID)
   // If we raster too fast we become upload bound, and pending
   // uploads consume memory. For maximum upload throughput, we would
   // want to allow for upload_throughput * pipeline_time of pending
   // uploads, after which we are just wasting memory. Since we don't
   // know our upload throughput yet, this just caps our memory usage.
   size_t divider = 1;
   if (base::android::SysUtils::IsLowEndDevice())
     divider = 6;
   // For reference Nexus10 can upload 1MB in about 2.5ms.
   const double max_mb_uploaded_per_ms = 2.0 / (5 * divider);
   // Deadline to draw a frame to achieve 60 frames per second.
   const size_t kMillisecondsPerFrame = 16;
   // Assuming a two frame deep pipeline between the CPU and the GPU.
   size_t max_transfer_buffer_usage_mb =
       static_cast<size_t>(2 * kMillisecondsPerFrame * max_mb_uploaded_per_ms);
   static const size_t kBytesPerMegabyte = 1024 * 1024;
   // We keep the MappedMemoryReclaimLimit the same as the upload limit
   // to avoid unnecessarily stalling the compositor thread.
   limits.mapped_memory_reclaim_limit =
       max_transfer_buffer_usage_mb * kBytesPerMegabyte;
 #endif
 
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
-      new WebGraphicsContext3DCommandBufferImpl(
-          surface_id(),
-          GetURLForGraphicsContext3D(),
-          gpu_channel_host.get(),
-          attributes,
-          false /* bind generates resources */,
-          limits,
-          NULL));
+      new WebGraphicsContext3DCommandBufferImpl(surface_id(),
+                                                GetURLForGraphicsContext3D(),
+                                                gpu_channel_host.get(),
+                                                attributes,
+                                                bind_generates_resources,
+                                                lose_context_when_out_of_memory,
+                                                limits,
+                                                NULL));
   return context.Pass();
 }
 
 void RenderWidget::RegisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.RemoveObserver(frame);
 }
 
 }  // namespace content