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1 vote
1 answer
162 views

I am creating an application using OpenGL (4.2). By default, the rendering is done on a panel in a window, it works without issues, but the panel can be docked/undocked, which causes the underlying ...
-1 votes
1 answer
75 views

I have a Delphi 7 application that tries to render an OpenGL scene into a TPanel by passing the property Handle of the TPanel to a C++ DLL (written in Visual Studio 2008). Here's the DLL function ...
1 vote
1 answer
312 views

I have a setup where an scene is rendered in an offscreen OpenGL framebuffer, then a compute shader extracts some data from it, and buts it into a ring buffer allocated on the device. This ring buffer ...
tmlen's user avatar
  • 9,242
2 votes
1 answer
502 views

I have a legacy OpenGL application which sets a pixel format based of ChoosePixelFormat instead of wglChoosePixelFormatARB or wglGetPixelFormatAttribivARB/wglGetPixelFormatAttribfvARB. ...
Irbis's user avatar
  • 1,601
2 votes
2 answers
222 views

To be clear, I've extensively tested this code and found the issue is somewhere with the code written prior to the WGL code. It's precisely in the WIN32 code. Now I think it could partially be caused ...
1 vote
1 answer
155 views

I am loading OpenGL in C# using LoadLibrary/GetProcAddress/wglGetProcAddress. For some reason, it fails to load the pointer for glBlendFunc, and other random ones after that point. I have been looking ...
-1 votes
1 answer
389 views

I draw the text using this two functions: https://pastebin.com/JVc5xFFT I draw the text - GlText(dc, "Test", ERGB{ 155, 179, 0 }, 5, 220); I build a font to uint with this function GLvoid ...
Elberer's user avatar
  • 11
4 votes
2 answers
2k views

I'm developing an application that can use any OpenGL version from 4.6 down to 2.0 by gradually disabling some features and optimizations. This means that it can live with 2.0 but prefers the latest ...
devoln's user avatar
  • 416
3 votes
1 answer
629 views

Recently I've been doing research on how OpenGL graphics drivers (ICD) implement OpenGL functions called by OpenGL runtime (opengl32.dll) on Windows. I understand that I can use the GetProcAddress to ...
ZP2016's user avatar
  • 31
1 vote
1 answer
647 views

I am trying to use glClearBufferfv(GL_COLOR, 0, red) to draw a red screen. The program displays a white screen and the loading icon on the cursor is continually rotating. I am using glew. I am also ...
2 votes
1 answer
3k views

Is wglMakeCurrent supposed to be called only once or does it need to be called before every buffer swap? Can current opengl context be reset by some external thing other then setting it via ...
Etwus's user avatar
  • 619
1 vote
0 answers
87 views

I'm writing graphics code that targets both an embedded VxWorks 653 system and Windows (VxWorks is our prime target that we're delivering, and Windows is our desktop environment to test). Our VxWorks ...
1 vote
1 answer
210 views

My goal is get pixel data from main window. nothing any rendering. like we see the monitor such as screencapture. I tried to TRANSPARENT windows, glReadPixel. so I have a TRANSPARENT windows and ...
Birds's user avatar
  • 65
0 votes
2 answers
6k views

I'm trying to my desktop image capture. (All images, including the desktop output to the monitor) It's easy using window API (BitBlt or CImageClass) and it's not the way I want. I want do it using ...
Birds's user avatar
  • 65
0 votes
1 answer
993 views

I am working on a multi threaded OpenGL application with OpenTK 3 and WinForms. I have 2 shared GraphicsContexts: a "main" rendering context, used for scene drawing and synchronous load operations. a ...

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