[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）

- Y& k! l; a% k/ I% k0 J# }3 `获得BackBuffer表面
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然后用D3DX的函数保存

void ScreenShot (char *filename)
& s, E2 s- Y* v/ U" z! D: K1 w9 u{
% z6 h# D: E* m7 `) J  B+ D  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;
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  //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);

  // 获得BackBuffer的D3D Surface
+ h* D$ L- E4 z% S/ \* d  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

  // Copy一下，，需要时转换颜色格式
: e8 y: q7 V0 q+ }% h  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 o, A1 u7 ^% D* i) K  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
}
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1 u$ n( a% n2 U/ B& ^2 F& i文件格式可以为：
4 a0 m$ p: ^! M! s9 }0 qD3DXIFF_BMP
; F- u3 ^- |: i0 _0 a. C' O    Microsoft Windows bitmap (BMP) file format.
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D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.

" R0 I: M7 V: D: tD3DXIFF_PNG
) y, u6 G) v& w6 [% o, Q    Portable Network Graphics (PNG) file format.
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& T& c  A$ l, m6 {8 c1 mD3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.

D3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.
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! v8 U  \0 s" S$ j2 M' K* bD3DXIFF_HDR
# `& Q2 M( [" n! V    High dynamic range file format.

D3DXIFF_PFM
   Portable float map file format.