[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
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" S, b( c! ?% }- @6 z' s5 F& z: |然后用D3DX的函数保存

2 x6 R2 M" W; Xvoid ScreenShot (char *filename)
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  IDirect3DSurface9 *tmp = NULL;
, `& n3 @3 j2 q3 A7 F# S) n7 a  IDirect3DSurface9 *back = NULL;

4 I" I2 s+ d7 {* w, I  //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
% E  k0 m4 H; F9 I2 L$ V  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

  // Copy一下，，需要时转换颜色格式
# j; [9 f# `0 R. [  }2 I) g  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);
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  // 保存成BMP格式
* x/ w. w$ H3 ~/ |! Q7 Q5 j/ r7 x  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
- X( Z) r# x' ~) R% [; q$ e. s8 }  SAFE_RELEASE(back);
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) R( W% j# V: }" I8 L6 u8 k9 \% X5 V文件格式可以为：
% T) y/ W, k# _- l) pD3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.
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D3DXIFF_JPG
: D. [3 ]# a( v5 n+ V: H3 ^    Joint Photographics Experts Group (JPEG) compressed file format.

D3DXIFF_PNG
/ U2 N; h; r& P. A3 X, O) W; s    Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.
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D3DXIFF_DIB
+ k5 F+ f: {6 _- ?0 U5 ?5 i    Windows device-independent bitmap (DIB) file format.
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D3DXIFF_HDR
   High dynamic range file format.
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% Z' `( d0 F( r* mD3DXIFF_PFM
   Portable float map file format.