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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。 7 w) p& x& l/ b4 T% V9 }! k
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原文9 x( ~  T1 ]* Q/ z2 C
http://hi.baidu.com/widebright/blog/item/6b3a233f97147eea54e7233f.html6 H2 f4 ?$ g7 }7 r( f
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在VS2003, DirectX9, Windows xp中测试通过,可能需要安装 DirectXSDK才能编译成功的。 ( M* g& @6 P+ q6 n, g, ?8 f( m
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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* {2 O6 x, }0 J) P- d2 ?% O// Direct3D9 includes
8 Z$ h# F3 {( s% a( i" |" |7 d#include <d3d9.h>
5 Z0 V) G7 j" M#include <d3dx9.h> 5 m% G1 [% ?5 f% J
#pragma comment( lib, "d3d9.lib" ) * J% z' f6 w% t/ n# v
#pragma comment( lib, "d3dx9.lib" )
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2 H: \$ ~: |* {6 N& |6 bint Capture ()
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LPDIRECT3D9 g_pD3D = NULL;
+ e  r; X; r* x% k0 xD3DDISPLAYMODE ddm; - H1 J' F4 W1 v3 V7 R3 O* Y( r
D3DPRESENT_PARAMETERS d3dpp; ! s' S( l3 n. a' N- u
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IDirect3DDevice9 * g_pd3dDevice;
% q5 e- o" u; [' K9 ?4 Y0 [IDirect3DSurface9 * pSurface;
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3 I) a4 l2 S8 }3 c  v5 A7 L! jZeroMemory(&d3dpp,sizeof(D3DPRESENT_PARAMETERS));
, Y! Y% t9 X9 E+ _/ {ZeroMemory( &d3dpp, sizeof(d3dpp) ); : j! `6 {2 k+ l9 R  F1 g, B

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  C4 i3 p. E5 [if((g_pD3D=Direct3DCreate9(D3D_SDK_VERSION))==NULL) * M0 c, R. h: h1 R* _+ {! r2 R
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return 1;
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& a* [  n  x) pif(FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&ddm)))
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return 1;
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d3dpp.Windowed=TRUE; 2 D( k* j# K9 J
d3dpp.Flags=D3DPRESENTFLAG_LOCKABLE_BACKBUFFER; 4 ^8 K/ J: P; G, i$ r) G
d3dpp.BackBufferFormat=ddm.Format;
/ o3 [7 D4 Q# B( b% g2 ~d3dpp.BackBufferHeight=ddm.Height;
% `2 \# Y% G3 A+ l. y6 g1 Gd3dpp.BackBufferWidth=ddm.Width;
" ~, K7 S, H! C# x& S) nd3dpp.MultiSampleType=D3DMULTISAMPLE_NONE; % z: d' |& f" O) ]
d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD; : ]3 r9 c; j8 C1 G7 P8 S
d3dpp.hDeviceWindow=GetDesktopWindow();
! o$ I0 z' p- f$ X- t  Gd3dpp.PresentationInterval=D3DPRESENT_INTERVAL_DEFAULT;
) \) ^# f) g/ ]" od3dpp.FullScreen_RefreshRateInHz=D3DPRESENT_RATE_DEFAULT; . ]1 v% r. ^  Z- Y$ i7 Z
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0 E8 R3 v' R9 G4 Z- Q$ i0 z  ~if(FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,GetDesktopWindow(),D3DCREATE_SOFTWARE_VERTEXPROCESSING ,&d3dpp,&g_pd3dDevice)))
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return 1; 6 s8 I" |0 `6 b! l- F
}
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( \5 g! q9 e/ T1 uif(FAILED(g_pd3dDevice->CreateOffscreenPlainSurface(ddm.Width, ddm.Height, D3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL)))
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return 1; ) y- U/ B6 d4 g
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# K- m& J# P; ?* q9 a9 kg_pd3dDevice->CreateOffscreenPlainSurface(1024, 768,
; ]7 f. J( b  K, y- }* ?( JD3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL);
2 ^6 S) I& Z5 mg_pd3dDevice->GetFrontBufferData(0, pSurface); 2 G! E9 B7 p" J- e
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D3DXSaveSurfaceToFile("Desktop.png",D3DXIFF_PNG,pSurface,NULL,NULL);//s保存为png格式
. N3 K, e. q: T" n5 g& E- ED3DXSaveSurfaceToFile("Desktop.jpg",D3DXIFF_JPG,pSurface,NULL,NULL);//保存为 jpg格式
+ F7 }6 i2 |; C  d* N' V1 dD3DXSaveSurfaceToFile("Desktop.bmp",D3DXIFF_BMP,pSurface,NULL,NULL);//保存为 bmp格式 : O7 q$ ~8 i) C1 l" L  f
pSurface->Release();
& E  w& W$ |/ c5 {. i; cg_pd3dDevice->Release (); 2 {* j6 z* h9 ]1 \
g_pD3D->Release (); $ K3 i) L3 E9 h: M" I
) q. p: E' @0 O# a8 i  }
return 0; + R$ D+ o$ ~" J8 i8 I! g4 t/ q& w9 r% R

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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), ' D# [% U& T& {, w8 z* I% W- j
//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 ( t8 Q$ P' u+ @8 ~
//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 % E+ l/ V7 K* O# e# ~3 @6 u) r
//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: " d: Y' D# c+ |' Y# b+ K/ r" l
//Video Renderer (VR)是接收RGB/YUV裸数据,然后在显示器上显示的Filter。
0 i- m6 P: {3 Q& G3 w( o: ?//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;
/ }. T! M; @* Z; o* I, j//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 + M. D8 ^- {% Q( p5 Q+ d/ U
//Video Mixing Renderer Filter 7 (VMR-7),
) W5 Z/ B. ~) E7 \- z//可以这么说,VMR是Windows平台上新一代的Video Renderer。
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  c0 b( T7 A$ c( D7 m6 N//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 ) o3 C8 z* u0 @; i2 J; T

' `. l: \& E( N: }8 `// ( j1 h5 M! D" u0 q8 ^* P9 X
//One consequence of hardware overlay use is that a screenshot program (for example, 3 @% T/ q4 I% y) t* N
//the one automatically built into Windows that activates when the PrtSc key is pressed) 4 t) _9 Q  I  ]- D8 Z
//often does not capture the content appearing in the hardware overlay window. Rather, ' x" d9 H) N" `4 o! `2 u( y2 S
//a blank region containing only the special mask color is captured. This is because the ' x) ^' I! y$ W( S) O
//screen capture routine doesn't consider the special video memory regions dedicated to 7 d" s% _8 E! g9 y
//overlays - it simply captures the shared main screen as rendered by the software's graphical + o# p9 k8 s6 d; ~
//subsystem. Some Digital Rights Management schemes use hardware overlay to display 1 m' ]9 y/ _; S6 J" v
//protected content on the screen, taking advantage of this quirk to prevent the copying of 8 H" U5 ~- T' D" E
//protected documents by way of screen capture[citation needed]. Disabling the support for 6 ?# [4 g7 ]9 w7 y" k5 r
//overlays causes the normally overlay using software to fallback to the shared memory,
) u, w* p0 Y- {. r; |//enabling screenshots.
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//Starting with Windows Vista's enhanced graphics capabilities, the basic concept / a) b* J. k% ^6 O
//of hardware overlays is replaced by full hardware compositing for every application window & V, n# ~2 M9 V1 `! |/ b; m% b
//running on the system, not just movie players or games, through the Desktop Window Manager.
  S( o. j# ?( U+ C//Mac OS X has been using hardware compositing since Quartz Extreme was introduced in Mac OS X 10.2. ) R7 M- v" ~/ z- J4 M! b. V
//To improve performance, each program draws to its own independent memory buffer instead of to a # p$ t9 J# Z: }9 l  `) U% x
//slow graphical subsystem. (In Windows Vista, each hardware overlay is more correctly known as
9 z* ~- ~2 a! Q: G//a Direct3D surface). Then, the system's GPU assembles each of the windows into a single / n; Y; P7 o+ q; o( y. z
//display screen in real time. With enhanced GPUs on the market capable of stunning 3D
' E0 A1 R( x* W4 g" @+ M' |//graphics as a consequence of the video game industry, impressive motion, scaling, / W3 a$ C  b: a7 u/ J, D& s
//and lighting effects can be applied to normal 2D windows by the operating system.
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1 y& I! A3 h5 @" l5 q! J//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。
- j1 Q  s5 B' A' z2 f$ U; w//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。
! f) [( ?4 T8 |0 s0 ~9 g//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。 6 u$ g3 |+ l- U8 Q
//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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