[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）

3 A, B9 d) B7 I- _* B获得BackBuffer表面

: H/ q4 V3 n' T3 d0 }然后用D3DX的函数保存
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. \" o2 S: K9 v$ F# n7 qvoid ScreenShot (char *filename)
{
  IDirect3DSurface9 *tmp = NULL;
" Q- t( X/ H/ Q7 I  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）
) ?7 c; [; g9 B" p1 @5 m  D3D9Device->CreateOffscreenPlainSurface(Width, Height, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &tmp, NULL);

; q2 G3 B* n! g* Q7 ~: P  // 获得BackBuffer的D3D Surface
: ?' j) Y. }% o) s: F+ y  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);
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* v. I2 O- @: T: Z' n) F  // Copy一下，，需要时转换颜色格式
2 n1 Z. l4 a5 u0 b/ s  J  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

3 ]1 t  x& r0 I6 R1 h  // 保存成BMP格式
3 v8 s- F6 k2 g" I0 ~  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
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  // 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：
D3DXIFF_BMP
: s9 _% F1 A4 \# U# H    Microsoft Windows bitmap (BMP) file format.
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4 {4 V1 x, y$ c% u7 J" e. HD3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
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4 P, {+ v# z' c& \  U) {+ fD3DXIFF_PNG
4 c# [7 ^3 K( e8 [# C9 t' i    Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
. J* A& Q9 J$ F( `$ u7 b6 l# a    Microsoft DirectDraw surface (DDS) file format.

D3DXIFF_DIB
: T% `5 G% S+ l* [- n: t    Windows device-independent bitmap (DIB) file format.
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  L* E+ i7 I9 I; ]* _8 X& VD3DXIFF_HDR
( B+ w% ~& l8 f) p* \( F& F    High dynamic range file format.
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7 T. R9 ?, R/ g+ D4 E1 ~$ `D3DXIFF_PFM
   Portable float map file format.