content: Add command line flag for native GPU memory buffers.

content/common/gpu/client/gpu_memory_buffer_impl.cc

 // Copyright 2013 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/common/gpu/client/gpu_memory_buffer_impl.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
 namespace {
 
+const struct TypeNamePair {
+  gfx::GpuMemoryBufferType type;
+  const char* name;
+} kTypeNamePairs[] = {
+  { gfx::SHARED_MEMORY_BUFFER, "shmem" },
+  { gfx::IO_SURFACE_BUFFER, "iosurface" },
+  { gfx::SURFACE_TEXTURE_BUFFER, "surfacetexture" },
+  { gfx::OZONE_NATIVE_BUFFER, "ozone" }
+};
+
 gfx::GpuMemoryBufferType g_preferred_type = gfx::EMPTY_BUFFER;
 
 struct DefaultPreferredType {
   DefaultPreferredType() : value(gfx::EMPTY_BUFFER) {
     std::vector<gfx::GpuMemoryBufferType> supported_types;
     GpuMemoryBufferImpl::GetSupportedTypes(&supported_types);
     DCHECK(!supported_types.empty());
     value = supported_types[0];
   }
   gfx::GpuMemoryBufferType value;
@@ skipping 13 matching lines @@
       callback_(callback),
       mapped_(false),
       destruction_sync_point_(0) {
 }
 
 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {
   callback_.Run(destruction_sync_point_);
 }
 
 // static
+gfx::GpuMemoryBufferType GpuMemoryBufferImpl::GetNamedType(
+    const std::string& name) {
+  for (size_t i = 0; i < arraysize(kTypeNamePairs); ++i) {

[piman, 2014/11/19 02:39:40]

nit: range for?

+    if (name == kTypeNamePairs[i].name)
+      return kTypeNamePairs[i].type;
+  }
+
+  return gfx::EMPTY_BUFFER;
+}
+
+// static
+const char* GpuMemoryBufferImpl::GetTypeName(gfx::GpuMemoryBufferType type) {
+  for (size_t i = 0; i < arraysize(kTypeNamePairs); ++i) {

[piman, 2014/11/19 02:39:40]

nit: range for?

+    if (type == kTypeNamePairs[i].type)
+      return kTypeNamePairs[i].name;
+  }
+
+  return "unknown";
+}
+
+// static
 void GpuMemoryBufferImpl::SetPreferredType(gfx::GpuMemoryBufferType type) {
   // EMPTY_BUFFER is a reserved value and not a valid preferred type.
   DCHECK_NE(gfx::EMPTY_BUFFER, type);
 
   // Make sure this function is only called once before the first call
   // to GetPreferredType().
   DCHECK_EQ(gfx::EMPTY_BUFFER, g_preferred_type);
 
   g_preferred_type = type;
 }
@@ skipping 31 matching lines @@
 
 bool GpuMemoryBufferImpl::IsMapped() const {
   return mapped_;
 }
 
 ClientBuffer GpuMemoryBufferImpl::AsClientBuffer() {
   return reinterpret_cast<ClientBuffer>(this);
 }
 
 }  // namespace content