[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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- _  t+ X2 [' t' ]! g获得BackBuffer表面

+ s3 D+ s5 Z; B2 u然后用D3DX的函数保存

& @0 @& B' z0 Y- @( hvoid ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
8 S. {1 B2 A3 Y, ]' u  IDirect3DSurface9 *back = NULL;

7 X" Z) s! L: s1 I7 f( ~- \" E/ `  //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）
7 A, P3 U( c( _- g" d  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);
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5 I0 h! W5 @1 K$ I; t# p  // Copy一下，，需要时转换颜色格式
  w8 |9 ~0 l$ D# ~/ H1 N) M1 m0 C  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

/ b/ O' Y4 z# |7 F$ h+ e3 J) J5 H  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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/ j6 a5 _; R$ o. l6 Y- ~  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
$ f$ u' C. S- e0 |  SAFE_RELEASE(back);
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文件格式可以为：
D3DXIFF_BMP
( H- T2 }( f2 f: K8 \$ P* K+ p    Microsoft Windows bitmap (BMP) file format.
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6 R5 O3 P  x& G4 k6 OD3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
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D3DXIFF_PNG
   Portable Network Graphics (PNG) file format.
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; l1 E( t4 O: B6 V* C( oD3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.

! H6 \" e1 i  {; n! `D3DXIFF_DIB
# A4 N, Z, m1 u    Windows device-independent bitmap (DIB) file format.
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D3DXIFF_HDR
1 U: A) ~1 ~$ r% _. V8 l6 E    High dynamic range file format.
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( J  v- y% r2 \D3DXIFF_PFM
0 |7 c1 t8 W' x- Z, f    Portable float map file format.