Show GpuMemoryBuffer feature in chrome://gpu

content/browser/gpu/compositor_util.cc

Index: content/browser/gpu/compositor_util.cc
diff --git a/content/browser/gpu/compositor_util.cc b/content/browser/gpu/compositor_util.cc
index 216d1da24b6c3facb393e0787fe4f765132f16d9..8ca8bb983282362bd31f8291e7beeb49fc2c8df2 100644
--- a/content/browser/gpu/compositor_util.cc
+++ b/content/browser/gpu/compositor_util.cc
@@ -30,6 +30,7 @@ const char* kGpuCompositingFeatureName = "gpu_compositing";
 const char* kWebGLFeatureName = "webgl";
 const char* kRasterizationFeatureName = "rasterization";
 const char* kMultipleRasterThreadsFeatureName = "multiple_raster_threads";
+const char* kNativeGpuMemoryBufferFeatureName = "native_gpu_memory_buffers";

[reveman, 2015/10/16 18:37:43]

s/GpuMemoryBuffer/GpuMemoryBuffers/

 
 const int kMinRasterThreads = 1;
 const int kMaxRasterThreads = 4;
@@ -156,6 +157,22 @@ const GpuFeatureInfo GetGpuFeatureInfo(size_t index, bool* eof) {
   return kGpuFeatureInfo[index];
 }
 
+const GpuFeatureInfo GetGpuGmbInfo(size_t index, bool* eof) {
+  const GpuFeatureInfo kGpuGmbInfo[] = {
+      {
+          kNativeGpuMemoryBufferFeatureName,
+          false,
+          !IsNativeGpuMemoryBufferEnabled(),
+          "GpuMemoryBuffers are using the fall back path through shared memory"
+          " instead the hardware backed one.",
+          true
+      },
+  };
+  DCHECK(index < arraysize(kGpuGmbInfo));
+  *eof = (index == arraysize(kGpuGmbInfo) - 1);
+  return kGpuGmbInfo[index];
+}
+
 }  // namespace
 
 bool IsPropertyTreeVerificationEnabled() {
@@ -208,6 +225,11 @@ bool IsZeroCopyUploadEnabled() {
 #endif
 }
 
+bool IsNativeGpuMemoryBufferEnabled() {

[reveman, 2015/10/16 18:37:43]

The logic used to determine if enable_native_gpu_memory_buffers variable in
GetNativeGpuMemoryBufferConfigurations (browser_gpu_memory_buffer_manager.cc) is
true should move here.

+  const auto& command_line = *base::CommandLine::ForCurrentProcess();
+  return command_line.HasSwitch(switches::kEnableNativeGpuMemoryBuffers);
+}
+
 bool IsPersistentGpuMemoryBufferEnabled() {
   // Zero copy currently doesn't take advantage of persistent buffers.
   if (IsZeroCopyUploadEnabled())
@@ -342,6 +364,25 @@ base::DictionaryValue* GetFeatureStatus() {
   return feature_status_dict;
 }
 
+base::DictionaryValue* GetGmbStatus() {
+  base::DictionaryValue* feature_status_dict = new base::DictionaryValue();
+
+  bool eof = false;
+  for (size_t i = 0; !eof; ++i) {
+    const GpuFeatureInfo gpu_gmb_info = GetGpuGmbInfo(i, &eof);
+    std::string status;
+    if (gpu_gmb_info.disabled) {
+      status = "disabled_software";
+    } else {
+      status = "enabled_on";
+    }
+
+    feature_status_dict->SetString(
+        gpu_gmb_info.name.c_str(), status.c_str());
+  }
+  return feature_status_dict;
+}
+
 base::Value* GetProblems() {
   GpuDataManagerImpl* manager = GpuDataManagerImpl::GetInstance();
   std::string gpu_access_blocked_reason;