[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）
$ o  X0 F0 q0 \. Q" A- {* W' [2 {
. H; _% l1 }3 Z) l: ~7 F获得BackBuffer表面

$ x' T, a" O  w/ m+ \. K8 g4 R然后用D3DX的函数保存

& x' x: x  c6 y. ~5 dvoid ScreenShot (char *filename)
% y4 ]$ ?; h2 [" M3 @{
2 s( s" ]2 r; u( o3 B/ z' v  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;

  //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);
" t0 k3 i' X5 ~0 ?" H( W
  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);

5 r% r. y' e; [: [2 _) i7 v9 w- a  // Copy一下，，需要时转换颜色格式
3 h9 g! \% h  B7 b+ T  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

  // 保存成BMP格式
& G# M0 v+ _* i0 |  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

  // 释放Surface，防止内存泄漏
& n: z. F( h( f4 L6 F2 b  SAFE_RELEASE(tmp);
( s) H  M" ?) o* G" Y  SAFE_RELEASE(back);
}

文件格式可以为：
D3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.

- F, t9 w( K) H9 X3 b( n+ ~+ RD3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
1 u5 X% |; {- m
D3DXIFF_PNG
/ J5 G7 T. H  a, F    Portable Network Graphics (PNG) file format.
7 T9 Z/ F: F+ N8 i) i$ D1 x& ^
  D, [3 V' F3 G7 I3 n3 c% ?D3DXIFF_DDS
. a' o- J5 f- ?' g0 R    Microsoft DirectDraw surface (DDS) file format.

7 V& c- `, y& D) T8 n( f8 qD3DXIFF_DIB
3 K; B: a* ~5 o    Windows device-independent bitmap (DIB) file format.
' M: ]9 b& @! l7 G- M% X
' |# F3 i/ q- ?! T) ]2 E1 C2 ^D3DXIFF_HDR
; }6 s% R7 O* q" l, T: @    High dynamic range file format.
: E, P4 S& N0 ]- b$ h
D3DXIFF_PFM
5 Y# _/ b8 ^/ X) u5 e; c# N& m5 Y7 n$ N    Portable float map file format.