在Hook代码中的,我们也许要对前台surface,后台surface的内容进行判断和保存,以下代码可以作为参考。 * j6 _* ]9 A! u" l s0 e
! E( `3 e! L v! Y, U% G9 i9 S原文
5 n6 _7 \& k3 `http://hi.baidu.com/widebright/blog/item/6b3a233f97147eea54e7233f.html, y* D' V; e0 O5 h# O8 y4 K/ j; q
0 X0 v( X4 _; v; n8 p9 V5 b. |5 ~: s在VS2003, DirectX9, Windows xp中测试通过,可能需要安装 DirectXSDK才能编译成功的。
* {: \3 S3 W! O0 @! ^$ W D5 D现在前面加上头文件和库, 然后需要截屏的时候,调用capture函数就可以了。
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! `6 Q4 X7 |9 y, k5 k// Direct3D9 includes / `8 j7 d% a$ ?) k+ S1 \& e
#include <d3d9.h> % b* B9 _5 h0 R; Q3 l# R# I$ L
#include <d3dx9.h>
1 ^1 `+ G9 K0 ^$ q4 O [) Q#pragma comment( lib, "d3d9.lib" ) & S3 X7 _# y% g9 \! H% k$ K
#pragma comment( lib, "d3dx9.lib" )
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int Capture () 4 ]8 P! T3 w, `. H" x4 L/ k7 s0 H
{
$ k- E1 L; i9 x/ gLPDIRECT3D9 g_pD3D = NULL;
' _4 X& `& g3 G+ L' GD3DDISPLAYMODE ddm; 9 L" \: g9 Z* ~3 ], T
D3DPRESENT_PARAMETERS d3dpp;
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3 N% V* B: N2 i# P; CIDirect3DDevice9 * g_pd3dDevice;
4 s# t+ U8 E/ V; @( TIDirect3DSurface9 * pSurface;
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ZeroMemory(&d3dpp,sizeof(D3DPRESENT_PARAMETERS)); ) r$ D3 s! D [$ A& z6 a4 B
ZeroMemory( &d3dpp, sizeof(d3dpp) ); * I R( G6 ?0 i0 T$ |
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) A7 d! k; }: K* fif((g_pD3D=Direct3DCreate9(D3D_SDK_VERSION))==NULL) ~" b# `/ X+ \3 z9 _
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return 1; 9 v3 a8 C4 [1 V6 Y) A( x. [7 r
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if(FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&ddm)))
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return 1;
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* g3 m* m3 Q+ V% ?$ ~6 _4 ed3dpp.Windowed=TRUE;
, z" h- m* k9 Q, F( N od3dpp.Flags=D3DPRESENTFLAG_LOCKABLE_BACKBUFFER; ' T4 N5 y: ]. G. ?, d. g5 X
d3dpp.BackBufferFormat=ddm.Format;
, S& @# R; x% r0 Pd3dpp.BackBufferHeight=ddm.Height; 5 \) [- B5 |3 @8 H
d3dpp.BackBufferWidth=ddm.Width; * Y5 X7 A8 O9 { c
d3dpp.MultiSampleType=D3DMULTISAMPLE_NONE;
& g `3 E+ h) P/ Z1 s% |d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD; : o; F5 w3 n0 `; J, N
d3dpp.hDeviceWindow=GetDesktopWindow();
$ M9 q' H% L& x8 Kd3dpp.PresentationInterval=D3DPRESENT_INTERVAL_DEFAULT; . }' V$ U! M2 ~) |8 o$ Q
d3dpp.FullScreen_RefreshRateInHz=D3DPRESENT_RATE_DEFAULT; $ R. A! z) B6 k8 w& r" ?
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if(FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,GetDesktopWindow(),D3DCREATE_SOFTWARE_VERTEXPROCESSING ,&d3dpp,&g_pd3dDevice)))
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& B- J% b h: q8 u9 Creturn 1;
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1 D) D* T2 |# M6 s9 P6 j; Hif(FAILED(g_pd3dDevice->CreateOffscreenPlainSurface(ddm.Width, ddm.Height, D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL))) + A1 L7 x$ _' M. A, ^
{
{6 Z9 l" W ~7 v- G* W, freturn 1;
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g_pd3dDevice->CreateOffscreenPlainSurface(1024, 768, , Q! a4 V$ w J
D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL);
3 D6 ?! F3 y& S+ H' S; ^) bg_pd3dDevice->GetFrontBufferData(0, pSurface); 4 f5 T2 x {1 ?" ]
! s& J) F4 w- ^% C+ Y: w' O! D0 tD3DXSaveSurfaceToFile("Desktop.png",D3DXIFF_PNG,pSurface,NULL,NULL);//s保存为png格式 2 K* C% ?2 u" n# \9 \1 j+ I! M8 S) c
D3DXSaveSurfaceToFile("Desktop.jpg",D3DXIFF_JPG,pSurface,NULL,NULL);//保存为 jpg格式 ; t; R5 H( g' ?
D3DXSaveSurfaceToFile("Desktop.bmp",D3DXIFF_BMP,pSurface,NULL,NULL);//保存为 bmp格式 % u- Y4 q& v; w2 |5 v. s3 c3 _
pSurface->Release();
6 `+ C$ O- |% s+ ?& xg_pd3dDevice->Release (); + k. t# k l3 b/ o! D1 \1 |1 c$ k
g_pD3D->Release (); + I& S8 q1 R) u& E2 q8 i
. k$ i9 |0 ?/ z# D3 D. e0 Dreturn 0; ! q$ `* j4 x5 ^
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//但这种方法并不能抓取有的播放器的图像,这是因为播放器显示页面时采用了hardware overlay (硬件加速),
8 u! A7 |( c) f* _8 O* J& {% k//你需要在“显示” 设置里面禁用该功能。或者有时你会发现,你多开一个播放器窗口,后面的就可以抓屏了,因为 ( F. n! j# `, S4 U
//overlay 技术的硬件支持有限,后面的不能再用这个技术了。有的人说编程hook 了DirectDraw的相应函数可以禁用 " `5 o8 H, c7 X# N
//这个功能。有的抓屏软件也可以做到,不知道人家是怎么做的。
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//下面是些参考资料:
) r5 S9 H$ P$ Z+ m- Q3 v7 \//Video Renderer (VR)是接收RGB/YUV裸数据,然后在显示器上显示的Filter。 3 \( m, M5 ?& z( p; W# D
//为提高计算机画图性能,根据你计算机显卡的能力,VR会优先使用DirectDraw以及Overlay表面;
6 H! ~+ x+ \) ?+ G; ?6 c/ n//如果这些特性得不到显卡的支持,VR会使用GDI函数进行画图 + \$ o# M5 O* X$ i
//Video Mixing Renderer Filter 7 (VMR-7),
1 G. g, k: L8 u0 V5 {//可以这么说,VMR是Windows平台上新一代的Video Renderer。 `5 b+ R! k2 ?! r( k
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//视频覆盖(Video Overlay) 或者说是hardware overlay 是早期的技术, 现在好像是VMR-7 , VMR-9 了
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//
2 h7 ~ ?: k. I3 M//One consequence of hardware overlay use is that a screenshot program (for example, ) X+ n. d8 U, I/ Z+ f7 z
//the one automatically built into Windows that activates when the PrtSc key is pressed)
, |7 ]! F& m( z4 ^# k, K- F//often does not capture the content appearing in the hardware overlay window. Rather,
+ n$ m9 A" X, {. Z2 E//a blank region containing only the special mask color is captured. This is because the + b% d; R) t: i8 R$ A+ H# ?
//screen capture routine doesn't consider the special video memory regions dedicated to ) b& S% U2 W- B1 V1 u
//overlays - it simply captures the shared main screen as rendered by the software's graphical
# Y* d5 ~) x1 ?! ~- x+ M//subsystem. Some Digital Rights Management schemes use hardware overlay to display
* m" w: {3 b' j2 U( Y//protected content on the screen, taking advantage of this quirk to prevent the copying of
+ ?9 @/ d" v0 J" `$ Y# z2 H6 m$ F//protected documents by way of screen capture[citation needed]. Disabling the support for $ Y4 N) v! m& k3 _# M( G" f
//overlays causes the normally overlay using software to fallback to the shared memory, * b9 F9 ]0 I' ~7 l
//enabling screenshots.
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//Starting with Windows Vista's enhanced graphics capabilities, the basic concept ! U" W, C; c9 [' M g+ Y# [+ [
//of hardware overlays is replaced by full hardware compositing for every application window
* b6 N4 `( l4 r# d//running on the system, not just movie players or games, through the Desktop Window Manager. - k' D3 J4 P6 e. h z+ ?
//Mac OS X has been using hardware compositing since Quartz Extreme was introduced in Mac OS X 10.2. % h5 F5 e2 w- m
//To improve performance, each program draws to its own independent memory buffer instead of to a + B# b I3 d5 X3 W
//slow graphical subsystem. (In Windows Vista, each hardware overlay is more correctly known as
! e9 _ Y3 I( T1 ~) s//a Direct3D surface). Then, the system's GPU assembles each of the windows into a single 8 F3 P$ D3 A+ K! g3 X
//display screen in real time. With enhanced GPUs on the market capable of stunning 3D 2 `( k5 I# n+ h, Y4 I+ V
//graphics as a consequence of the video game industry, impressive motion, scaling, : D4 B6 f: s0 h" C
//and lighting effects can be applied to normal 2D windows by the operating system. , E5 x: V0 F) \' F4 R5 n% E
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7 S6 z6 {& Y# K o- a//步骤1双击“控制面板”中的“显示”图标,或在桌面空白位置单击右键,选择“属性”,打开显示属性设置窗口。选择“设置”选项卡,并单击窗口中的“高级”按钮,打开高级属性设置窗口。 ( s7 L& L3 N5 O
//步骤2 在高级属性设置窗口中选择“疑难解答”选项卡,拖动“硬件加速”滑块至“无”,单击“确定”退出。
. r( d! I9 @5 z. f4 }1 v2 _6 O1 [& S//步骤3 在视频播放软件比如RealOne中拖拉滑杆至需要截取的画面,按PrintScreen键截取屏幕界面。 5 |: h" Q4 y5 V: H, @* A4 X
//步骤4 打开“开始”/“程序”/“附件”/“画图”,单击“编辑”/“粘贴”将截取后存储于剪贴板的屏幕截图粘贴到画图程序中,可以看到,已经可以成功截取视频图像,不过,较之启用硬件加速功能,此时的视频图像质量会有一定程度的损失 |