Removed misleading hide/unhide Cocoa notifications.
We have no way of knowing when a Cocoa window is maximized and then restored (right?)
Disabled spamy mouse motion events by default.
Matthias 2011-02-23 09:37:51 PST
Please view the attached source file. Using this minimal program (as attached),
it creates an OpenGL 2.0 context with a cleared color buffer. If I set the
OpenGL version to 3.2, the function SDL_GL_CreateContext fails (or more
specifically, glXMakeCurrent fails) with an X11 BadMatch error:
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 128 (GLX)
Minor opcode of failed request: 5 (X_GLXMakeCurrent)
Serial number of failed request: 153
Current serial number in output stream: 153
Also note that if I do not specify the alpha buffer size, the program works for
OpenGL 2.0 and OpenGL 3.2.
After some further analysis, I believe I have found the problem. The specific
issue is in:
SDL_x11opengl.c::X11_GL_CreateContext.
Note that for OpenGL 3.2 contexts, the GLXFBConfig to use is chosen as the best
match from glXChooseFBConfig. However, opengl attributes originally set with
SDL_GL_SetAttribute are not mapped to GLX attributes and then passed to the
glXChooseFBConfig function. According to the GLX 1.4 specification, if the
attributes are not specified, the function falls back to defaults (which, in
this particular case, prefer alpha channel size == 0).
For testing purposes, I modified the call to glXChooseFBConfig to look
something like this:
int glxAttribs[] =
{
GLX_RED_SIZE,8,
GLX_GREEN_SIZE,8,
GLX_BLUE_SIZE,8,
GLX_ALPHA_SIZE,8,
None
};
if (!glXChooseFBConfig ||
!(framebuffer_config = glXChooseFBConfig(display, DefaultScreen(display),
glxAttribs, &fbcount)))
{
...
}
The best match GLXFBConfig then supports 8 bit alpha channel. The program then
works as intended.
Hope this helps!
The only reason we need a custom view is to handle right mouse down.
Implemented mouse grabbing, although it's kind of clunky right now. I'll be adding a relative mode that will be smoother soon.
