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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Helper functions that Direct3D 9Ex code a little easier to work with for
      6 // the ui/surface code.
      7 
      8 #ifndef UI_SURFACE_D3D9_UTILS_WIN_H_
      9 #define UI_SURFACE_D3D9_UTILS_WIN_H_
     10 
     11 #include <d3d9.h>
     12 
     13 #include "base/basictypes.h"
     14 #include "base/win/scoped_comptr.h"
     15 #include "ui/surface/surface_export.h"
     16 
     17 namespace base {
     18 class ScopedNativeLibrary;
     19 }
     20 
     21 namespace gfx {
     22 class Size;
     23 }
     24 
     25 namespace ui_surface_d3d9_utils {
     26 
     27 // Visible for testing. Loads the Direct3D9 library. Returns true on success.
     28 SURFACE_EXPORT
     29 bool LoadD3D9(base::ScopedNativeLibrary* storage);
     30 
     31 // Visible for testing. Creates a Direct3D9 device suitable for use with the
     32 // accelerated surface code. Returns true on success.
     33 SURFACE_EXPORT
     34 bool CreateDevice(const base::ScopedNativeLibrary& d3d_module,
     35                   uint64 adapter_luid,
     36                   D3DDEVTYPE device_type,
     37                   uint32 presentation_interval,
     38                   IDirect3DDevice9Ex** device);
     39 
     40 // Calls the Vista+ (WDDM1.0) variant of CreateTexture that semantically opens a
     41 // texture allocated as shared. In this way textures allocated by another
     42 // process can be used by a D3D context in this process. The shared texture is
     43 // identified by its surface handle. The resulting texture is written into
     44 // |opened_texture|.
     45 //
     46 // Returns true on success.
     47 SURFACE_EXPORT
     48 bool OpenSharedTexture(IDirect3DDevice9* device,
     49                        int64 surface_handle,
     50                        const gfx::Size& size,
     51                        IDirect3DTexture9** opened_texture);
     52 
     53 // Ensures that |surface| is a lockable surface of a specified |size|. If
     54 // |*surface| is non-null and has dimensions that match |size|, it is reused.
     55 // Otherwise, a new resource is created and the old one (if any) is freed.
     56 //
     57 // Returns true on success.
     58 SURFACE_EXPORT
     59 bool CreateOrReuseLockableSurface(
     60     IDirect3DDevice9* device,
     61     const gfx::Size& size,
     62     base::win::ScopedComPtr<IDirect3DSurface9>* surface);
     63 
     64 // Ensures that |texture| is a render target texture of a specified |size|. If
     65 // |*texture| is non-null and has dimensions that match |size|, it is reused.
     66 // Otherwise, a new resource is created and the old one (if any) is freed.
     67 //
     68 // A reference to level 0 of the resulting texture is placed into
     69 // |render_target|.
     70 //
     71 // Returns true on success.
     72 SURFACE_EXPORT
     73 bool CreateOrReuseRenderTargetTexture(
     74     IDirect3DDevice9* device,
     75     const gfx::Size& size,
     76     base::win::ScopedComPtr<IDirect3DTexture9>* texture,
     77     IDirect3DSurface9** render_target);
     78 
     79 SURFACE_EXPORT
     80 gfx::Size GetSize(IDirect3DTexture9* texture);
     81 
     82 SURFACE_EXPORT
     83 gfx::Size GetSize(IDirect3DSurface9* surface);
     84 
     85 }  // namespace ui_surface_d3d9_utils
     86 
     87 #endif  // UI_SURFACE_D3D9_UTILS_WIN_H_
     88