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标题: 【代理DLL汉化研究】DirectX3D9 技术实现的抓屏 [打印本页]

作者: shane007    时间: 2009-5-24 16:36
标题: 【代理DLL汉化研究】DirectX3D9 技术实现的抓屏
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。 / O% o# ]: B9 ^
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原文; s) e8 q( e. f6 o7 m4 s1 X
http://hi.baidu.com/widebright/blog/item/6b3a233f97147eea54e7233f.html: c( B5 m5 U0 L$ M! Y

) Q2 \: w3 Y. \7 V& \在VS2003, DirectX9, Windows xp中测试通过,可能需要安装 DirectXSDK才能编译成功的。
# |* P4 j  F2 @+ a8 I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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// Direct3D9 includes
  R( u* b9 q6 j0 f* }4 b, \#include <d3d9.h> 0 z, E/ ]) n( s! b
#include <d3dx9.h> , f4 `( N0 y8 N/ i' J% }" x
#pragma comment( lib, "d3d9.lib" )
( J  Q4 [4 _" z$ v# k' k& k6 l#pragma comment( lib, "d3dx9.lib" )
% K; N' x  i6 [; H/ C6 x' y  n" I4 x2 I, o) {
int Capture ()
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LPDIRECT3D9 g_pD3D = NULL;
4 l/ h) o( w0 K) C0 w. ^! W, _; GD3DDISPLAYMODE ddm;
- b  A0 o  d) QD3DPRESENT_PARAMETERS d3dpp; 8 F# x6 B9 N4 e: u4 a7 }: E3 A( H
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IDirect3DDevice9 * g_pd3dDevice;   }) C$ a+ B7 Q& \3 X
IDirect3DSurface9 * pSurface;
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ZeroMemory(&d3dpp,sizeof(D3DPRESENT_PARAMETERS));
& R4 r2 d! u9 m  hZeroMemory( &d3dpp, sizeof(d3dpp) ); ; f. q6 V4 a$ T- f% P
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; O, S0 z1 H2 n3 J" f, M1 Tif((g_pD3D=Direct3DCreate9(D3D_SDK_VERSION))==NULL)
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return 1;
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/ m3 R: M2 v3 _2 _/ }& v, J7 Z2 Lif(FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&ddm)))
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return 1; 3 G1 C1 W* L% S  l- R1 U% v: Q6 k
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% @, m/ _) a0 l0 }" k/ r+ {d3dpp.Windowed=TRUE;
1 Z0 T) t. w' nd3dpp.Flags=D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;
- R' _9 W$ L8 B4 M& \4 \4 Ld3dpp.BackBufferFormat=ddm.Format; + Y* W2 `( p9 r; H: N5 I
d3dpp.BackBufferHeight=ddm.Height;
$ l8 y( \  k) o- p1 Kd3dpp.BackBufferWidth=ddm.Width;
; X+ [3 h+ k7 S  N6 a& ^* n1 O' ud3dpp.MultiSampleType=D3DMULTISAMPLE_NONE;
* V' n1 g; q# Y3 a% _) n; zd3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD; - Q9 p& [, A8 f# @
d3dpp.hDeviceWindow=GetDesktopWindow(); ! l* N9 m7 F0 O; F8 A! q
d3dpp.PresentationInterval=D3DPRESENT_INTERVAL_DEFAULT; 9 h# l# m2 @1 ^, F+ A; [) p
d3dpp.FullScreen_RefreshRateInHz=D3DPRESENT_RATE_DEFAULT;
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- u3 d4 S/ i2 k% m. S* A5 fif(FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,GetDesktopWindow(),D3DCREATE_SOFTWARE_VERTEXPROCESSING ,&d3dpp,&g_pd3dDevice)))
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4 t; n9 ~+ s" R8 Nreturn 1; 0 n$ |3 G9 f; q
}
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8 A( C* `/ n) t! rif(FAILED(g_pd3dDevice->CreateOffscreenPlainSurface(ddm.Width, ddm.Height, D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL))) 8 @; V/ Q& q9 l; U, T% X
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return 1; ) |# z' ?# q* L4 X2 Q$ O
}
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" E( d* f- @( @. H' v; Z5 gg_pd3dDevice->CreateOffscreenPlainSurface(1024, 768, ; r; c; z3 f6 w5 B0 Z- y
D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL);
$ u! L  g. }, @2 B! xg_pd3dDevice->GetFrontBufferData(0, pSurface); % z+ r+ x7 M) ^: F" Z/ f

& T, d/ K$ J, }* FD3DXSaveSurfaceToFile("Desktop.png",D3DXIFF_PNG,pSurface,NULL,NULL);//s保存为png格式
2 A; E6 a. \% e- J- x+ I! ]D3DXSaveSurfaceToFile("Desktop.jpg",D3DXIFF_JPG,pSurface,NULL,NULL);//保存为 jpg格式
; c4 b5 f- ^5 d9 P7 e( ID3DXSaveSurfaceToFile("Desktop.bmp",D3DXIFF_BMP,pSurface,NULL,NULL);//保存为 bmp格式 / N" B6 }* I- W9 E* l2 |6 x/ \
pSurface->Release();
( d+ m$ o* ^# n: Z' Z6 T7 h0 g8 @; \g_pd3dDevice->Release ();
0 u2 C; y5 }8 Q& g* Xg_pD3D->Release (); : ?$ l$ B& }  t- n

4 o4 h; s$ U6 b/ K8 \2 Mreturn 0;
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}
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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),
3 b+ q% M. ^8 \8 ?$ @//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
0 P. ]5 [9 J( o# I( H//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 1 Q) S) L5 S6 {# z6 {9 q
//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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/ t' g; N  \+ O: L, b//下面是些参考资料: * X" K: ^: I7 C& Z
//Video Renderer (VR)是接收RGB/YUV裸数据,然后在显示器上显示的Filter。
$ e' Z  i$ {4 L8 n: _( g# g//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;
7 o% C( k, a  e- r9 i//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
6 \! c! h5 E  X/ H//Video Mixing Renderer Filter 7 (VMR-7), 8 [$ o, C* d0 G% X2 g' `
//可以这么说,VMR是Windows平台上新一代的Video Renderer。
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1 X! E: e8 e$ G4 \+ R7 c//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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//
% O2 `$ b/ F) O//One consequence of hardware overlay use is that a screenshot program (for example, 7 V9 j) J2 l$ g& c, W4 s
//the one automatically built into Windows that activates when the PrtSc key is pressed)
8 a/ @# f) p8 ]2 V" u$ K//often does not capture the content appearing in the hardware overlay window. Rather,
. \( H1 z& _# M; {* x$ Q) z* m6 E//a blank region containing only the special mask color is captured. This is because the & G6 f3 l) I' T$ w9 N8 F% j6 R
//screen capture routine doesn't consider the special video memory regions dedicated to ' |5 i2 E% l. W# s2 z& V
//overlays - it simply captures the shared main screen as rendered by the software's graphical # r2 f5 q5 r3 s
//subsystem. Some Digital Rights Management schemes use hardware overlay to display & B* Z& L  N; n
//protected content on the screen, taking advantage of this quirk to prevent the copying of ) U' m, G2 w* f7 [. b) U! f
//protected documents by way of screen capture[citation needed]. Disabling the support for
3 e- B) V8 J, Q& C, j//overlays causes the normally overlay using software to fallback to the shared memory, ! ]/ i& y8 j! z: f
//enabling screenshots.
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//Starting with Windows Vista's enhanced graphics capabilities, the basic concept
% n2 _0 ]# c2 F( P' T# k, z//of hardware overlays is replaced by full hardware compositing for every application window
1 e7 I  R. |+ k/ G$ ?3 `8 b# G//running on the system, not just movie players or games, through the Desktop Window Manager.
2 g3 e' S: _! h' p( F2 d//Mac OS X has been using hardware compositing since Quartz Extreme was introduced in Mac OS X 10.2. $ d, k; }- N, k. y
//To improve performance, each program draws to its own independent memory buffer instead of to a 1 B$ ^$ L9 K1 u3 Y. t7 P
//slow graphical subsystem. (In Windows Vista, each hardware overlay is more correctly known as 8 V. c: C9 |; x, `2 c
//a Direct3D surface). Then, the system's GPU assembles each of the windows into a single
2 l% P/ \  e3 }8 D" y3 l3 G//display screen in real time. With enhanced GPUs on the market capable of stunning 3D
7 k" m3 @9 g6 {7 M1 `//graphics as a consequence of the video game industry, impressive motion, scaling,
; B( B" u' Y7 t+ D. M" S) B. e//and lighting effects can be applied to normal 2D windows by the operating system.
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//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。
; x, p% q5 Q/ M; \# l. x//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。 ) t# C2 [" q9 N1 h2 `
//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。 7 V* i1 ?$ p* N9 |9 |/ H& U
//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




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