[收藏]D3D中简单的截图方法

天云上人

  在渲染完所有东东后（Present之前）

' f) b* |: ?% Y! F7 }获得BackBuffer表面
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然后用D3DX的函数保存

8 Y, N+ b% d5 K2 dvoid ScreenShot (char *filename)
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/ p+ i9 Q- S" D, W2 @  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;

7 C1 l* C; p0 [5 ?  //生成固定颜色模式的离屏表面（Width和 Height为屏幕或窗口的宽高）
  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);
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& m6 Y& I$ |, S8 O  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

  // Copy一下，，需要时转换颜色格式
  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

, T! D) V- f- s& e; v2 Q3 A  |  // 保存成BMP格式
6 Y5 e* v2 P+ u+ q) T; p5 H- k  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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1 l. H" f( g1 I0 G. K  // 释放Surface，防止内存泄漏
# U8 C9 {/ K3 ^8 e  SAFE_RELEASE(tmp);
6 ^1 R6 _- k# V3 _/ u* A4 r  SAFE_RELEASE(back);
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文件格式可以为：
D3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.
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D3DXIFF_JPG
) c2 Z' y3 E  D6 e( W% r    Joint Photographics Experts Group (JPEG) compressed file format.
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7 P9 O  w6 E" c5 h. @D3DXIFF_PNG
   Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
" T! y! \5 s/ q$ p% W1 f    Microsoft DirectDraw surface (DDS) file format.

, d- u" _2 o6 d6 L: mD3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.

D3DXIFF_HDR
   High dynamic range file format.
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D3DXIFF_PFM
   Portable float map file format.