[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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0 v* }( v$ W3 s1 R/ W然后用D3DX的函数保存
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$ j/ t( n+ C, g$ L- U+ e1 zvoid ScreenShot (char *filename)
{
$ _2 r5 ^  j: V+ C3 n' v) p  IDirect3DSurface9 *tmp = NULL;
6 s0 y, e2 J, b2 x: I0 w( L  h* }; R7 R  IDirect3DSurface9 *back = NULL;
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  //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）
" z' ?+ [# f! P. w2 ], y  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);

  // Copy一下，，需要时转换颜色格式
  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);
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  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
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文件格式可以为：
; |: h2 l$ e5 q0 v/ wD3DXIFF_BMP
1 K: U6 G( V% Q  T+ l0 y' c) a    Microsoft Windows bitmap (BMP) file format.

D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.

: a0 ?$ Q4 S! d4 aD3DXIFF_PNG
# f. `% Q2 X5 k# ?! Z    Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
  R4 I. ]8 ^5 D$ F- e1 H    Microsoft DirectDraw surface (DDS) file format.
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4 [+ ]+ |( E" d3 I! y7 J& b' f% hD3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.
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  E# `; B) ]' H7 b8 W/ ND3DXIFF_HDR
: g/ |9 _- j7 @3 F3 ?    High dynamic range file format.
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D3DXIFF_PFM
   Portable float map file format.