[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）

) R- }* z4 b( n0 |( X获得BackBuffer表面
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然后用D3DX的函数保存

void ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
" c7 u: D/ j. v7 b$ L8 K  IDirect3DSurface9 *back = NULL;

* P% x' L7 F5 M0 a/ |( H1 \5 K0 |7 T! h  //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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$ y/ Z; n7 ?% ]  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

; A" [. q# g) ?  k9 W2 [8 u, B% k7 F  // 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);

3 d# E5 U+ D' p( `+ ?7 P  // 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：
5 B1 s" c8 H& {* x: sD3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.

" o+ D8 j& K% t7 q% }! {) ]D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.

D3DXIFF_PNG
   Portable Network Graphics (PNG) file format.
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D3DXIFF_DDS
& r, P' K9 e( n    Microsoft DirectDraw surface (DDS) file format.

9 O1 a% m6 [0 u) ~/ `0 }5 @D3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.

9 j0 L8 [# o* |% lD3DXIFF_HDR
# q4 ]1 L; E0 J) d    High dynamic range file format.

1 x2 X# U5 Y4 z" w' QD3DXIFF_PFM
7 _5 {- U8 U% [+ w    Portable float map file format.