[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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5 ~  f0 y( y1 _- Y% ?获得BackBuffer表面
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! W; n9 Z, }( s, ^$ D然后用D3DX的函数保存
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0 g$ I$ e1 o4 y- vvoid ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
( w7 L- n) Y/ j" G- J+ k$ t' {  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）
# H2 S/ m: g! W. ?  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);
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/ d, D- r# e2 U; D) z! y% K: Z  // 获得BackBuffer的D3D Surface
2 o& z7 G# M+ }% L% P! o  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

0 C2 J4 G) [+ f1 q, X  // Copy一下，，需要时转换颜色格式
9 M7 J# |$ _# g  o6 L+ l  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

  // 保存成BMP格式
' I, X3 m9 m1 _  `; E  e* _9 M  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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4 a. w- y# u8 {" J  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
}

文件格式可以为：
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  h& \2 |. A! w! n3 u( z9 ^    Microsoft Windows bitmap (BMP) file format.

D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
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1 `7 K( ]& X* L$ J; m# vD3DXIFF_PNG
" @% w+ w- i' g" ]4 Q    Portable Network Graphics (PNG) file format.
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D3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.
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D3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.

, Q% L) R; u- z5 s8 c6 wD3DXIFF_HDR
, b: `1 x: h6 U9 E    High dynamic range file format.
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D3DXIFF_PFM
; ~/ {) ^/ ?# x) N1 l& `9 i    Portable float map file format.