[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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9 q8 D" j! E  l7 Q, v! d获得BackBuffer表面
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然后用D3DX的函数保存
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! s: n; ^6 E9 S! g% k. l. N$ Cvoid ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;
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5 {1 J6 b  d1 I2 H4 a. z5 F1 ?  //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);
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  // 获得BackBuffer的D3D Surface
" @+ o8 W$ @8 v+ v; t9 y  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

  // Copy一下，，需要时转换颜色格式
5 O! B# o: n( t6 B& H' X  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

3 Q/ F8 _( }5 ^8 D" d# b3 f! ~  // 保存成BMP格式
" o8 u! R8 s7 p! N$ L  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

0 x+ B- S( x) n( Q& |  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
5 j, @3 N! X8 d8 Y0 }  \  SAFE_RELEASE(back);
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文件格式可以为：
D3DXIFF_BMP
  Z. V6 m- l: v: ~    Microsoft Windows bitmap (BMP) file format.
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D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.

D3DXIFF_PNG
   Portable Network Graphics (PNG) file format.

: m6 C0 P9 n: _' g; vD3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.

& K' \8 [- ?+ SD3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.
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D3DXIFF_HDR
2 X: ?1 G3 m  d7 t. W    High dynamic range file format.

D3DXIFF_PFM
/ }) o" `; x) e# [7 N* _    Portable float map file format.