I am working on an WinNT application that has several opengl windows all sharing a single rendering context, and i have two issues i would like to hear anyones opinion about,
First, I used to have a problem where after doing my rendering i would call SwapBuffers but would fail silently. It would return false, but there would not be any error set when i called GetLastError(). After trying a few different things and reading about CS_OWNDC in some posts i tried it out and the SwapBuffers problem was gone along with some other weird painting when my windows overlapped. I do not however understand fully what the difference is. Could someone explain to me why this might have solved my problem? Does any one know of a link to some page that describes fully how CS_OWNDC affects openGL rendering, that might give some insight as to why this fixed my problem. I am asking because i am not certain that i have fixed the problem and i am wondering if i am just coincidentally masking it or something.
Second, after putting in CS_OWNDC now i am getting a failure of wglMakeCurrent in another part of my application, where i did not use to get a failure before. When i bring up a fifth window that overlaps the other 4 windows it fails, I call GetLastError() and i get the following error: 0x000007d5 The requested clipping operation is not supported. The rendering context and device context are both valid
so i am not sure what is causing this? Anyone have any clues, things that i should check for?
thanks in advance