Clean up GLSurfaceCGL

content/common/gpu/image_transport_surface_mac.mm

+// 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/common/gpu/image_transport_surface_fbo_mac.h"
+
+#include "content/common/gpu/gpu_messages.h"
+#include "content/common/gpu/image_transport_surface_iosurface_mac.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_surface_osmesa.h"
+
+namespace content {
+namespace {
+
+// A subclass of GLSurfaceOSMesa that doesn't print an error message when
+// SwapBuffers() is called.
+class DRTSurfaceOSMesa : public gfx::GLSurfaceOSMesa {
+ public:
+  // Size doesn't matter, the surface is resized to the right size later.
+  DRTSurfaceOSMesa() : GLSurfaceOSMesa(GL_RGBA, gfx::Size(1, 1)) {}
+
+  // Implement a subset of GLSurface.
+  virtual bool SwapBuffers() OVERRIDE;
+
+ private:
+  virtual ~DRTSurfaceOSMesa() {}
+  DISALLOW_COPY_AND_ASSIGN(DRTSurfaceOSMesa);
+};
+
+bool DRTSurfaceOSMesa::SwapBuffers() {
+  return true;
+}
+
+bool g_allow_os_mesa = false;
+
+}  //  namespace
+
+// static
+scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateNativeSurface(
+    GpuChannelManager* manager,
+    GpuCommandBufferStub* stub,
+    const gfx::GLSurfaceHandle& surface_handle) {
+  DCHECK(surface_handle.transport_type == gfx::NATIVE_DIRECT ||
+         surface_handle.transport_type == gfx::NATIVE_TRANSPORT);
+
+  switch (gfx::GetGLImplementation()) {
+    case gfx::kGLImplementationDesktopGL:
+    case gfx::kGLImplementationAppleGL:
+      return scoped_refptr<gfx::GLSurface>(new ImageTransportSurfaceFBO(
+          new IOSurfaceStorageProvider, manager, stub, surface_handle.handle));
+    default:
+      // Content shell in DRT mode spins up a gpu process which needs an
+      // image transport surface, but that surface isn't used to read pixel
+      // baselines. So this is mostly a dummy surface.
+      if (!g_allow_os_mesa) {
+        NOTREACHED();
+        return scoped_refptr<gfx::GLSurface>();
+      }
+      scoped_refptr<gfx::GLSurface> surface(new DRTSurfaceOSMesa());
+      if (!surface.get() || !surface->Initialize())
+        return surface;
+      return scoped_refptr<gfx::GLSurface>(new PassThroughImageTransportSurface(
+          manager, stub, surface.get()));
+  }
+}
+
+// static
+void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
+  g_allow_os_mesa = allow;
+}
+
+}  // namespace content