[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）
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获得BackBuffer表面

然后用D3DX的函数保存
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void ScreenShot (char *filename)
{
. C- c2 y; |+ V" h  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;

! V+ H8 K, T, P0 M  //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）
2 u( m' P8 E2 U5 }# R1 \  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);
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  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

& t+ U% t, C+ i8 }' B4 c/ U7 D  // Copy一下，，需要时转换颜色格式
! g, y5 G2 Y" K" H$ w  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

  // 保存成BMP格式
2 G. W6 c1 J* H7 s( B  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

' D" p8 r0 V) F  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
8 V% b* H! r" A5 A  SAFE_RELEASE(back);
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文件格式可以为：
" l6 A9 j" n5 [4 Q3 [- v7 [D3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.
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( q+ v2 t. [% r4 A& d4 c7 @D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.

D3DXIFF_PNG
' A" X- E) H0 d) w! K( P: L    Portable Network Graphics (PNG) file format.
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D3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.

D3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.

D3DXIFF_HDR
  C& N9 R5 {7 f    High dynamic range file format.

D3DXIFF_PFM
   Portable float map file format.