-
Chun-wei Fan authored
Since on Windows we need to use a good amount of temporary GL contexts, we need to switch back to the original GL contexts we were using when we are done with the temporary GL contexts, otherwise multi-GL windows will cause confusions causing display artifacts and crashes. Also, use the GdkWin32GLContext::gl_hdc consistently throughout the code and remove the GdkWin32Display::gl_hdc as Lukas K pointed out that GdkWin32Display::gl_hdc becomes out-of-date and so the HDC that the GL context is bound to becomes incorrect in sceanarios using multiple windows with GtkGLArea/GdkGLArea items (which would cause the artifacts in programs that use multiple windows with GtkGLArea/GdkGLArea items, and it turns out that GdkWin32Display::gl_hdc is actually not necessary to help keep track of the HDCs we use for our GL contexts. Partly based on patch from Lukas K <lu@0x83.eu> https://bugzilla.gnome.org/show_bug.cgi?id=789213
d38a148f