http://bugs.winehq.org/show_bug.cgi?id=31914
--- Comment #7 from Henri Verbeet hverbeet@gmail.com 2012-10-09 15:58:49 CDT --- Created attachment 42055 --> http://bugs.winehq.org/attachment.cgi?id=42055 glc patch
Glc doesn't take the current framebuffer binding into account, it's mildly surprising this works for anything at all. Applying the attached patch to glc should fix it, although it's not quite a proper patch. For example, it should check if FBOs are available before calling FBO functions, and the current framebuffer binding isn't the only GL state that can break glc. At the very least there's also various GL_PACK_* state and the pixel pack buffer binding to take into account. I'll leave those issues as an exercise for the glc maintainers.