Add WebKitPlatformSupport::createOffscreenGraphicsContext3D

This is in preparation of https://bugs.webkit.org/show_bug.cgi?id=76593

BUG=99516
TEST=manually ran Chrome w/accelerated content, DRT, test_shell_tests.


Review URL: http://codereview.chromium.org/9297046

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119857 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 27 insertions, 2 deletions

diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index e8a32e1..c8eb610 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1473,7 +1473,7 @@ WebStorageNamespace* RenderViewImpl::createSessionStorageNamespace(
 }
 
 WebGraphicsContext3D* RenderViewImpl::createGraphicsContext3D(
-    WebGraphicsContext3D::Attributes attributes,
+    const WebGraphicsContext3D::Attributes& attributes,
     bool direct) {
   if (!webview())
     return NULL;
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index e8728f4..b892a80 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -342,7 +342,7 @@ class RenderViewImpl : public RenderWidget,
   virtual WebKit::WebStorageNamespace* createSessionStorageNamespace(
       unsigned quota);
   virtual WebKit::WebGraphicsContext3D* createGraphicsContext3D(
-      WebKit::WebGraphicsContext3D::Attributes attributes,
+      const WebKit::WebGraphicsContext3D::Attributes& attributes,
       bool direct);
   virtual void didAddMessageToConsole(
       const WebKit::WebConsoleMessage& message,
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index 80bb6fa..7e0f796 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -581,6 +581,28 @@ RendererWebKitPlatformSupportImpl::createGraphicsContext3D() {
   }
 }
 
+WebKit::WebGraphicsContext3D*
+RendererWebKitPlatformSupportImpl::createOffscreenGraphicsContext3D(
+    const WebGraphicsContext3D::Attributes& attributes) {
+  // The WebGraphicsContext3DInProcessImpl code path is used for
+  // layout tests (though not through this code) as well as for
+  // debugging and bringing up new ports.
+  scoped_ptr<WebGraphicsContext3D> context;
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kInProcessWebGL)) {
+    context.reset(new webkit::gpu::WebGraphicsContext3DInProcessImpl(
+        gfx::kNullPluginWindow, NULL));
+  } else {
+#if defined(ENABLE_GPU)
+    context.reset(new WebGraphicsContext3DCommandBufferImpl());
+#else
+    return NULL;
+#endif
+  }
+  if (!context->initialize(attributes, NULL, false))
+    return NULL;
+  return context.release();
+}
+
 double RendererWebKitPlatformSupportImpl::audioHardwareSampleRate() {
   return audio_hardware::GetOutputSampleRate();
 }
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.h b/content/renderer/renderer_webkitplatformsupport_impl.h
index b7eadeb..b8fe5b3 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.h
+++ b/content/renderer/renderer_webkitplatformsupport_impl.h
@@ -11,6 +11,7 @@
 #include "base/platform_file.h"
 #include "content/common/content_export.h"
 #include "content/common/webkitplatformsupport_impl.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebGraphicsContext3D.h"
 
 class RendererClipboardClient;
 class WebSharedWorkerRepositoryImpl;
@@ -82,6 +83,8 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   virtual WebKit::WebFileSystem* fileSystem() OVERRIDE;
   virtual WebKit::WebSharedWorkerRepository* sharedWorkerRepository() OVERRIDE;
   virtual WebKit::WebGraphicsContext3D* createGraphicsContext3D() OVERRIDE;
+  virtual WebKit::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
+      const WebKit::WebGraphicsContext3D::Attributes& attributes);
   virtual double audioHardwareSampleRate() OVERRIDE;
   virtual size_t audioHardwareBufferSize() OVERRIDE;
   virtual WebKit::WebAudioDevice* createAudioDevice(