[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

8 ]; r  Z# m, w; _- _然后用D3DX的函数保存
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void ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
( \' W& R  g1 f7 H3 n8 c  IDirect3DSurface9 *back = NULL;

, w4 X  I8 h# r  //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）
( C. c' J. E  |6 k4 m  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);

  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

0 \0 {" U5 P9 }8 u* M3 g" \  // Copy一下，，需要时转换颜色格式
2 f+ n/ Z* W1 \& Y# O/ D8 x" Y; J  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);
, p, U, I8 T5 t  {
  // 保存成BMP格式
% U. p/ r8 `5 \. m" M  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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! p+ l! n5 f& D8 s" P8 B  // 释放Surface，防止内存泄漏
# h. P6 ~. K( d' c# N7 R! z  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
}
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% X& ?: G0 H% ?3 j9 h文件格式可以为：
/ e( S9 }; u  T1 `' v8 }D3DXIFF_BMP
5 |( v1 A, N6 O1 W: _    Microsoft Windows bitmap (BMP) file format.
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5 O6 P9 [. ?$ X5 C9 y  T$ ~5 VD3DXIFF_JPG
7 @1 ~0 O- y7 I2 q- F  E4 \' {    Joint Photographics Experts Group (JPEG) compressed file format.

5 K5 N2 {9 q2 ?% T/ {3 B5 B. _! P4 hD3DXIFF_PNG
! I1 @$ Y6 L6 v+ u4 }- N' h7 P    Portable Network Graphics (PNG) file format.
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2 b; l, S2 H! ]D3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.
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# @/ U# }+ |2 `1 G% cD3DXIFF_DIB
  C  y" X# m0 V) O    Windows device-independent bitmap (DIB) file format.

D3DXIFF_HDR
& w# V1 j( E4 I1 U1 U0 C; r' Q    High dynamic range file format.
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8 o2 A7 O* N1 A3 j* ID3DXIFF_PFM
( f4 n. \5 W/ A; z6 D, m8 X+ \  I    Portable float map file format.