[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）

, Y2 c1 O- H: S7 W/ w) S获得BackBuffer表面
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: d. h1 Z8 Y$ d% w0 I5 E/ [然后用D3DX的函数保存
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void ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;
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  W" e* ~8 {9 W4 R- m7 w+ ?  //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）
/ N0 L! M4 f/ D: n5 ^  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);

  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

+ F& ?5 K; b/ m3 v  a. p+ a  // Copy一下，，需要时转换颜色格式
3 f* w' w' y& i- s  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

! p3 ~. m/ e2 W  // 释放Surface，防止内存泄漏
% c# J9 l- n, T1 x) {) a  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
}

文件格式可以为：
2 l( n5 S1 X. Y+ l, xD3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.
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D3DXIFF_JPG
9 ~; v+ o' E6 k, I. ~/ q    Joint Photographics Experts Group (JPEG) compressed file format.

) e8 G' L4 w# Y6 xD3DXIFF_PNG
   Portable Network Graphics (PNG) file format.
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: Y% ]6 B/ H: e8 RD3DXIFF_DDS
4 |! Q' _$ b% R6 I+ z    Microsoft DirectDraw surface (DDS) file format.

D3DXIFF_DIB
$ P/ z6 J: O1 f' F* Q    Windows device-independent bitmap (DIB) file format.

# Z+ S* J# p5 G1 {! {. u( eD3DXIFF_HDR
* T" I0 [6 M6 M- B: M( t3 b& X3 S* ]    High dynamic range file format.

* Z# ]( l- E! B7 R* jD3DXIFF_PFM
   Portable float map file format.