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Merged context creation BacMatch workaround from 2.7.1.

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This commit is contained in:
Camilla Berglund 2010-10-04 22:18:58 +02:00
parent 1792f08dbd
commit f73f01b68c
2 changed files with 21 additions and 0 deletions
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1
readme.html
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@ -292,6 +292,7 @@ version of GLFW.</p>
<li>Removed <code>GLFWCALL</code> and <code>GLFWAPIENTRY</code> macros for stdcall calling convention</li>
<li>Bugfix: The default OpenGL version in the <code>version</code> test was set to 1.1</li>
<li>Bugfix: The OpenGL profile and forward-compatibility window parameters were not saved after context creation</li>
<li>[X11] Bugfix: Calling <code>glXCreateContextAttribsARB</code> with an unavailable OpenGL version caused the application to terminate with a <code>BadMatch</code> Xlib error</li>
<li>[Win32] Removed explicit support for versions of Windows older than Windows XP</li>
</ul>

20
src/x11/x11_window.c
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@ -45,6 +45,17 @@
#define Button6 6
#define Button7 7
//========================================================================
// Error handler for BadMatch errors when requesting context with
// unavailable OpenGL versions using the GLX_ARB_create_context extension
//========================================================================
static int errorHandler(Display *display, XErrorEvent* event)
{
return 0;
}
//========================================================================
// Checks whether the event is a MapNotify for the specified window
//========================================================================
@ -580,12 +591,21 @@ static int createContext(_GLFWwindow* window, const _GLFWwndconfig* wndconfig, G
setGLXattrib(attribs, index, None, None);
// This is the only place we set an Xlib error handler, and we only do
// it because glXCreateContextAttribsARB generates a BadMatch error if
// the requested OpenGL version is unavailable (instead of a civilized
// response like returning NULL)
XSetErrorHandler(errorHandler);
window->GLX.context =
window->GLX.CreateContextAttribsARB(_glfwLibrary.X11.display,
*fbconfig,
share,
True,
attribs);
// We are done, so unset the error handler again (see above)
XSetErrorHandler(NULL);
}
else
{