[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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获得BackBuffer表面

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' s4 j" \, f( G6 w% S: }void ScreenShot (char *filename)
{
! Y  s" E- _$ v' k1 Q  IDirect3DSurface9 *tmp = NULL;
+ }4 ?1 }& U) }4 ^% M  IDirect3DSurface9 *back = NULL;
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7 d, }1 ]9 i+ s' s; U8 Q  //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）
# e. J- ?- ~: V5 U$ Z* `  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);
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" r+ k' t7 n+ C5 B4 E! X  // 获得BackBuffer的D3D Surface
; b1 ^/ R7 B' T8 f" c$ C' |2 k# H  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);
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  // 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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  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
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文件格式可以为：
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   Microsoft Windows bitmap (BMP) file format.
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D3DXIFF_JPG
4 }8 ^' Z+ p  W5 A    Joint Photographics Experts Group (JPEG) compressed file format.
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D3DXIFF_PNG
8 r, b' D' l1 {' D. N: _0 n    Portable Network Graphics (PNG) file format.

4 \, O5 I# s9 X2 u# ?D3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.
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D3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.

D3DXIFF_HDR
& v9 K0 _& D" f5 |- P" G) k    High dynamic range file format.

D3DXIFF_PFM
' U# i1 D, W8 `5 M5 y0 g    Portable float map file format.