Separate image processing logic from presentation logic.

ui/surface/d3d9_utils_win.h

+// 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.
+
+// Helper functions that Direct3D 9Ex code a little easier to work with for
+// the ui/surface code.
+
+#ifndef UI_SURFACE_D3D9_UTILS_WIN_H_
+#define UI_SURFACE_D3D9_UTILS_WIN_H_
+
+#include <d3d9.h>
+
+#include "base/basictypes.h"
+
+namespace base {
+class ScopedNativeLibrary;
+}
+
+namespace gfx {
+class Size;
+}
+
+namespace ui_surface_d3d9_utils {
+
+// Visible for testing. Loads the Direct3D9 library. Returns true on success.
+bool LoadD3D9(base::ScopedNativeLibrary* storage);
+
+// Visible for testing. Creates a Direct3D9 device suitable for use with the
+// accelerated surface code. Returns true on success.
+bool CreateDevice(const base::ScopedNativeLibrary& d3d_module,
+                  D3DDEVTYPE device_type,
+                  uint32 presentation_interval,
+                  IDirect3DDevice9Ex** device);
+
+// Calls the Vista+ (WDDM1.0) variant of CreateTexture that semantically
+// opens a texture allocated (possibly in another process) as shared. The
+// shared texture is identified by its surface handle. The resulting texture
+// is written into |opened_texture|.
+//
+// Returns true on success.
+bool OpenSharedTexture(IDirect3DDevice9* device,
+                       int64 surface_handle,
+                       const gfx::Size& size,
+                       IDirect3DTexture9** opened_texture);
+
+// Create a one-off lockable surface of a specified size.
+//
+// Returns true on success.
+bool CreateTemporaryLockableSurface(IDirect3DDevice9* device,
+                                    const gfx::Size& size,
+                                    IDirect3DSurface9** surface);
+
+// Create a one-off renderable texture of a specified size. The texture object
+// as well as the surface object for the texture's level 0 is returned (callers
+// almost always need to use both).
+//
+// Returns true on success.
+bool CreateTemporaryRenderTargetTexture(IDirect3DDevice9* device,
+                                        const gfx::Size& size,
+                                        IDirect3DTexture9** texture,
+                                        IDirect3DSurface9** render_target);
+
+}  // namespace ui_surface_d3d9_utils
+
+#endif  // UI_SURFACE_D3D9_UTILS_WIN_H_