[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）
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9 J0 }5 J" y+ o7 v8 d' V获得BackBuffer表面

然后用D3DX的函数保存

) m$ A  v/ ]5 M. Z* Uvoid ScreenShot (char *filename)
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  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;

+ \6 K! b8 }  E3 s9 r/ P2 E2 l  //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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  // 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);
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$ C. F5 y3 Q) a1 W. O0 e2 y  // 保存成BMP格式
+ A* Q- f* y# z+ F, H4 g  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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, v9 y8 N) _( h7 m. |  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
% K1 X- x* U8 T}

文件格式可以为：
4 W9 W% ]  Y# u, MD3DXIFF_BMP
: q3 m1 r/ i! p. ^9 Y    Microsoft Windows bitmap (BMP) file format.
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* l' x( v+ K4 W+ L6 J1 i; c, HD3DXIFF_JPG
! Z; L$ T# i/ v! I& ?6 e    Joint Photographics Experts Group (JPEG) compressed file format.
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+ i! w; H! R' A* `, WD3DXIFF_PNG
   Portable Network Graphics (PNG) file format.
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; D% @, \# U! C9 k: ~3 t+ CD3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.

: l( r0 y+ M7 H  @D3DXIFF_DIB
. T. _2 D) D  _5 \    Windows device-independent bitmap (DIB) file format.

- ]: D1 m! x; M" |# Z+ L3 yD3DXIFF_HDR
   High dynamic range file format.
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) g" L9 t0 y0 y3 X! O+ l8 iD3DXIFF_PFM
   Portable float map file format.