Ensure GL initialization only happens once, and provide common init path

webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.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 "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
 #include <string>
 
 #include "base/atomicops.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "gpu/command_buffer/client/gl_in_process_context.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/command_buffer/client/gles2_lib.h"
 #include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
 #include "ui/gfx/size.h"
-#include "ui/gl/gl_surface.h"
+#include "ui/gl/gl_implementation.h"
 
 using gpu::gles2::GLES2Implementation;
 using gpu::GLInProcessContext;
 
 namespace webkit {
 namespace gpu {
 
 namespace {
 
 const int32 kCommandBufferSize = 1024 * 1024;
@@ skipping 29 matching lines @@
 static base::LazyInstance<GLES2Initializer> g_gles2_initializer =
     LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace anonymous
 
 // static
 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
 WebGraphicsContext3DInProcessCommandBufferImpl::CreateViewContext(
     const blink::WebGraphicsContext3D::Attributes& attributes,
     gfx::AcceleratedWidget window) {
-  scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl> context;
-  if (gfx::GLSurface::InitializeOneOff()) {
-    context.reset(new WebGraphicsContext3DInProcessCommandBufferImpl(
+  DCHECK_NE(gfx::GetGLImplementation(), gfx::kGLImplementationNone);
+  return make_scoped_ptr(new WebGraphicsContext3DInProcessCommandBufferImpl(
       scoped_ptr< ::gpu::GLInProcessContext>(), attributes, false, window));
-  }
-  return context.Pass();
 }
 
 // static
 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
 WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
     const blink::WebGraphicsContext3D::Attributes& attributes) {
   return make_scoped_ptr(new WebGraphicsContext3DInProcessCommandBufferImpl(
-                             scoped_ptr< ::gpu::GLInProcessContext>(),
-                             attributes,
-                             true,
-                             gfx::kNullAcceleratedWidget))
-      .Pass();
+      scoped_ptr< ::gpu::GLInProcessContext>(),
+      attributes,
+      true,
+      gfx::kNullAcceleratedWidget));
 }
 
 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
 WebGraphicsContext3DInProcessCommandBufferImpl::WrapContext(
     scoped_ptr< ::gpu::GLInProcessContext> context,
     const blink::WebGraphicsContext3D::Attributes& attributes) {
-  return make_scoped_ptr(
-      new WebGraphicsContext3DInProcessCommandBufferImpl(
-          context.Pass(),
-          attributes,
-          true /* is_offscreen. Not used. */,
-          gfx::kNullAcceleratedWidget /* window. Not used. */))
-      .Pass();
+  return make_scoped_ptr(new WebGraphicsContext3DInProcessCommandBufferImpl(
+      context.Pass(),
+      attributes,
+      true /* is_offscreen. Not used. */,
+      gfx::kNullAcceleratedWidget /* window. Not used. */));
 }
 
 WebGraphicsContext3DInProcessCommandBufferImpl::
     WebGraphicsContext3DInProcessCommandBufferImpl(
         scoped_ptr< ::gpu::GLInProcessContext> context,
         const blink::WebGraphicsContext3D::Attributes& attributes,
         bool is_offscreen,
         gfx::AcceleratedWidget window)
     : is_offscreen_(is_offscreen),
       window_(window),
@@ skipping 1067 matching lines @@
 
 DELEGATE_TO_GL_9(asyncTexSubImage2DCHROMIUM, AsyncTexSubImage2DCHROMIUM,
     WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei,
     WGC3Denum, WGC3Denum, const void*)
 
 DELEGATE_TO_GL_1(waitAsyncTexImage2DCHROMIUM, WaitAsyncTexImage2DCHROMIUM,
     WGC3Denum)
 
 }  // namespace gpu
 }  // namespace webkit