gdi

The following code SETS the colour filter of the screen to a specific colour. How can I instead GET the colour of the screen? [DllImport("GDI32.dll")] private unsafe static extern bool SetDeviceGammaRamp(IntPtr hdc, void* ramp); private static IntPtr hdc; public unsafe bool SetLCDbrightness(Color c) { short red = c.R; short green = c.G; short blue = c.B; Graphics gg = Graphics.FromHwnd(IntPtr.Zero); hdc = gg.GetHdc(); short* gArray = stackalloc short[3 * 256]; short* idx = gArray; short brightness = 0; for (int j = 0; j < 3; j++) { if (j == 0) brightness = red; if (j == 1) brightness = green;

I'm trying to draw a polygon with more than one holes. I tried the following code and it does not work correctly. Please advise. PointF[] mypoly = new PointF[6 + 5 + 5]; mypoly[0] = new PointF(0, 0); mypoly[1] = new PointF(100, 0); mypoly[2] = new PointF(100, 100); mypoly[3] = new PointF(0, 100); mypoly[4] = new PointF(10, 80); mypoly[5] = new PointF(0, 0); mypoly[6] = new PointF(10, 10); mypoly[7] = new PointF(10, 20); mypoly[8] = new PointF(20, 20); mypoly[9] = new PointF(20, 10); mypoly[10] = new PointF(10, 10); mypoly[11] = new PointF(40, 10); mypoly[12] = new PointF(40, 20); mypoly[13] =

How can I intersect two (.NET) GraphicsPath objects? Are you trying to get the area enclosed by two different paths? That is a Region , not a path: var rgn1 = new Region(path1); var intersection = rgn1.Intersect(path2); rgn1.Dispose(); If that is not what you mean, you will have to provide more information. 来源： https://stackoverflow.com/questions/503376/intersecting-graphicspath-objects

EasyPlayer是一个RTSP专属的流媒体播放器，在GitHub上开源大部分源码其主要功能有播放、抓图、录制视频、实时静音/取消静音。 GDI和D3D两种视频渲染方式的区别 EasyPlayer-RTSP windows播放器支持D3D和GDI两种渲染方式。 D3D支持格式如下： DISPLAY_FORMAT_YV12 DISPLAY_FORMAT_YUY2 DISPLAY_FORMAT_UYVY DISPLAY_FORMAT_A8R8G8B8 DISPLAY_FORMAT_X8R8G8B8 DISPLAY_FORMAT_RGB565 DISPLAY_FORMAT_RGB555 GDI支持格式如下： DISPLAY_FORMAT_RGB24_GDI GDI渲染方式则是我们熟知的采用GDI进行图像绘制，其优势就是通用性强，只要是目前常用的windows操作系统基本上都支持；其劣势就是效率比较低下，也只支持RGB24一种色彩格式显示； D3D渲染方式则刚好相反，其优势就是效率比较高，支持多种色彩格式进行渲染；劣势就是通用性较差，windows系统必须要支持D3D才可以使用，需要一定的硬件支撑。 GDI渲染格式界面选择如下： D3D渲染格式界面选择如下： 从界面上可以看出GDI方式的OSD字幕叠加比D3D方式有明显的区别

I'm currently building a 2D Game Engine in C#, using GDI. I do know that there are better alternatives to GDI but I'm also so deep into the project I can't turn back now. So, I currently have a graphics engine, that renders a portion of a bitmap, depending on what my cameras position and windows size is, which has given me a great performance boost. Great! However, I've noticed that if I place a bunch of game objects, in the same position, I get the same frame rate compared to if I placed the objects in different positions. So, maybe the graphics engine is rendering parts of the bitmap that

In the following code, anytime CreateCompatibleDC is called, the resulting device context only has two colors: black and white. case WM_PAINT: { PAINTSTRUCT ps; ps.hdc=GetDC(g_CSkeletalViewerApp.m_hWnd); ps.fErase=true; RECT rc; GetWindowRect(g_CSkeletalViewerApp.m_hWnd, &rc ); ps.rcPaint=rc; int width = rc.right - rc.left; int height = rc.bottom - rc.top; HDC hdc=BeginPaint(hWnd,&ps); HDC memdc=CreateCompatibleDC(hdc); HBITMAP membm=CreateCompatibleBitmap(memdc,width,height); SelectObject(memdc,membm); for(int i=rc.left; i<rc.right; i++) { for(int j=rc.top; j<rc.bottom; j++) SetPixel(memdc,i

I am coding little fun gadget. I want to be able to draw second (or more) mouse pointer icons at different location than the original mouse but to move it according to move of original mouse. I know how to track movement of the mouse but I dunno how to draw/redraw mouse pointer; can anyone help? This could be done like: (1) grab the current mouse cursor from your application, using LoadCursor ( http://msdn.microsoft.com/en-us/library/aa924571.aspx ). Just specify NULL, and the cursor you want. Or just load a bitmap for the cursor. Now, you have a bitmap. (2) Next step is to get the Device

EasyScreenLive是一款简单、高效、稳定的集采集，编码，组播，推流和流媒体RTSP服务于一身的同屏功能组件，具低延时，高效能，低丢包等特点。 LibEasyScreenLive通过GDI方式实现屏幕捕获采集 windows端最通用的屏幕捕获方式就是通过GDI（图形设备接口）获取桌面的设备上下文DC，然后将其内容转换为RGB位图，从而转换成视频帧实现屏幕的采集，GDI是一种微软较为古老的技术，其采集效率相对较低，不过实现30fps帧率的桌面采集还是绰绰有余的，而且在设备性能较差或者操作系统版本较低的系统上也能兼容。 LibEasyScreenLive通过GDI方式实现屏幕捕获采集的实现主要是通过CCaptureScreen 类实现，该类声明如下： class CCaptureScreen { public: CCaptureScreen(void); ~CCaptureScreen(void); public: //Interface Function int SetCaptureCursor(bool bShow); int Init(HWND hShowWnd); void UnInit(); int StartScreenCapture(int nCapMode = 2, int fps = 25); void StopScreenCapture(); void