[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）
, T9 v8 N% x  v0 N8 m+ L/ `
获得BackBuffer表面

; P. T' N. b! _7 z$ M然后用D3DX的函数保存

* l4 E, c3 s/ j( Vvoid ScreenShot (char *filename)
( C8 T2 |7 N& w% }{
2 V- {( c4 U* l" ^  IDirect3DSurface9 *tmp = NULL;
5 f6 E* m+ F3 H$ b  X  t6 U  IDirect3DSurface9 *back = NULL;
) l* B3 H; K: A/ `
5 X' F5 S4 p$ N8 O  //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);

. v$ x, G6 {7 L+ C! J/ ], L  // 获得BackBuffer的D3D Surface
  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);
1 D/ ^  [; y, r% n: p9 J6 ^
  // Copy一下，，需要时转换颜色格式
7 S+ [2 H7 l% x$ M7 G4 d8 U! m6 O  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);
1 O+ S8 N2 c* V
  // 保存成BMP格式
$ i% G. s" T  m# t  X2 H. ?  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);

6 |" \0 a* C9 F' [! W* F  // 释放Surface，防止内存泄漏
  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
, G/ X" o& \" f}
6 M0 \9 e& F/ @+ M$ h
+ ^! s3 S1 M+ O; \% ?, o文件格式可以为：
D3DXIFF_BMP
7 K& A6 x1 \4 [  E9 H2 |    Microsoft Windows bitmap (BMP) file format.
7 a) C# J+ D& _
D3DXIFF_JPG
* A, K3 w  b8 y# \8 H' o+ A! x1 f4 V    Joint Photographics Experts Group (JPEG) compressed file format.
% J8 r1 p  p9 K  _3 u! ~" C2 B) q$ W
D3DXIFF_PNG
4 ~' @( d: Q: A    Portable Network Graphics (PNG) file format.
3 _; e& ?% v# p3 h: m6 _3 P' A
$ C+ i' t& }$ c1 Q$ N# tD3DXIFF_DDS
   Microsoft DirectDraw surface (DDS) file format.
7 y7 r! O' Q) \) Q0 q; f
D3DXIFF_DIB
( t4 [/ |7 h2 I' t7 q4 a/ N8 s% @( o    Windows device-independent bitmap (DIB) file format.

9 j$ q8 t$ f) _D3DXIFF_HDR
7 c2 {7 o6 @; _    High dynamic range file format.
. q' U8 ^: Z1 r- A5 A
D3DXIFF_PFM
   Portable float map file format.