[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）

获得BackBuffer表面

4 m( ^3 O0 `& J$ `$ P然后用D3DX的函数保存
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# I% x( C9 M# {0 n9 v' jvoid ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
$ M) ^# \3 }; V5 G  IDirect3DSurface9 *back = NULL;
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- N3 S& Z+ R! K. _  //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
) V: U! K% ], e1 y: D5 v  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);
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+ V( l9 D- q7 F  // Copy一下，，需要时转换颜色格式
  M/ {3 Z$ m5 h1 X7 O; v5 f  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);
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+ e) \  O0 b7 _9 M  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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8 `/ F8 N3 y+ y% X  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
$ n# }. ~9 s3 f7 x& d  SAFE_RELEASE(back);
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4 @7 D3 u( k$ L1 k文件格式可以为：
, x; w& D' D, p' u; W) b. }D3DXIFF_BMP
2 N) y- O7 d3 [* @* |* l    Microsoft Windows bitmap (BMP) file format.

D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
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9 |$ A! r* D2 o1 F3 J( RD3DXIFF_PNG
   Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.

/ F$ i$ k" Q* z& t; L% w7 V8 cD3DXIFF_DIB
' |  N2 w% d6 ~% v* |8 q    Windows device-independent bitmap (DIB) file format.

* H) R9 v" @+ K* L$ b' ]' `3 \& kD3DXIFF_HDR
  j% ?9 d2 Z& Z+ a6 |" I    High dynamic range file format.
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D3DXIFF_PFM
% `! n: Q) T/ G, o    Portable float map file format.