[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）

/ A. G% N! H- [' m获得BackBuffer表面
8 V9 z/ a, [  V# V* f) C* @; d
& P& W. G8 r+ i' j/ @然后用D3DX的函数保存
4 w$ U; A( @8 P. U4 @+ ~; ~
void ScreenShot (char *filename)
1 t; A, ^. z4 P. v& n{
  IDirect3DSurface9 *tmp = NULL;
  IDirect3DSurface9 *back = NULL;

, O3 L# R5 X# Q  `1 @  //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);

  // 获得BackBuffer的D3D Surface
5 q# G% W* v. V( X# y  D3D9Device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back);
& z+ @8 f3 a) p2 |0 K/ e
  // Copy一下，，需要时转换颜色格式
  D3DXLoadSurfaceFromSurface(tmp, NULL, NULL, back, NULL, NULL, D3DX_FILTER_NONE, 0);

. R6 E. [; I9 B" n9 C4 u  // 保存成BMP格式
  D3DXSaveSurfaceToFile(filename, D3DXIFF_BMP, tmp, NULL, NULL);
+ O2 m4 V+ o$ w+ l
, I" n/ V5 b. W  ^. u* X" Z9 v  // 释放Surface，防止内存泄漏
: D) U; f7 @2 Y# `+ O  SAFE_RELEASE(tmp);
  SAFE_RELEASE(back);
  i7 |# ?$ x* E7 I! r% M- k}

8 C4 K/ O. r; p9 |! y0 z& t文件格式可以为：
D3DXIFF_BMP
   Microsoft Windows bitmap (BMP) file format.

D3DXIFF_JPG
   Joint Photographics Experts Group (JPEG) compressed file format.
# A6 _  w( C* Z  I) B- g) @
0 T* n0 u& `) ~) d& z3 q9 Z2 |D3DXIFF_PNG
9 {! e3 j& {3 L# [1 J9 v    Portable Network Graphics (PNG) file format.

D3DXIFF_DDS
" E) K% B( h' h& t! h1 I    Microsoft DirectDraw surface (DDS) file format.
5 p" A( I/ I- z- Z' e: o9 l
% c. W! {& l% n& x7 ^) a! ID3DXIFF_DIB
   Windows device-independent bitmap (DIB) file format.
1 g( b, f/ U" d
D3DXIFF_HDR
0 J) n: [, T, {9 ^7 ]% I    High dynamic range file format.

- Q5 ]: }* Q# j; ?D3DXIFF_PFM
% J$ J! @6 E9 n% Z$ c4 C    Portable float map file format.