[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
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# r' C3 A' N, A& g8 ~! k; c  W0 @然后用D3DX的函数保存

8 d: @, @0 F" }8 k( G; l* Ivoid ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
6 M: L1 F" ]1 }9 Q5 n- f! v+ w  m  IDirect3DSurface9 *back = NULL;

  //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
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

  // Copy一下，，需要时转换颜色格式
5 ~' t# x7 }2 U6 `8 o. U0 J% k* R  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);
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1 }; C! s8 }1 m( D: \" L7 M  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

( v4 c$ W/ P& N9 h) P7 o3 y  // 释放Surface，防止内存泄漏
. K! {: \  g% S6 c7 }  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
( l0 a+ E9 i( l" s, |}
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文件格式可以为：
D3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.

/ B6 n* p! X0 S: i9 ~  R3 I9 PD3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
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D3DXIFF_PNG
3 E- Q& V/ z! k4 C$ N2 n7 @    Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
2 I/ ?2 Z+ u; h( F) R    Microsoft DirectDraw surface (DDS) file format.

$ l) A. N3 q0 @( i! \6 S! KD3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.
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: P  D2 ?6 c. ^! V* j7 D1 t. \1 j+ LD3DXIFF_HDR
$ B2 z7 X# z9 j( U' H3 h; X7 B    High dynamic range file format.
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D3DXIFF_PFM
$ e" d; p" N) m( z    Portable float map file format.