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Add a useless call to glXQueryVersion() before doing anything in the GLX port to work around a bug in the VirtualBox OpenGL driver.

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This commit is contained in:
Patrick Walton
2015-12-29 13:25:03 -05:00
parent bcddb42cfb
commit cf3097f6a0
1 changed files with 12 additions and 0 deletions
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12
src/api/glx/mod.rs
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@@ -41,6 +41,18 @@ impl Context {
opengl: &'a GlAttributes<&'a Context>, display: *mut ffi::Display)
-> Result<ContextPrototype<'a>, CreationError>
{
// This is completely ridiculous, but VirtualBox's OpenGL driver needs some call handled by
// *it* (i.e. not Mesa) to occur before anything else can happen. That is because
// VirtualBox's OpenGL driver is going to apply binary patches to Mesa in the DLL
// constructor and until it's loaded it won't have a chance to do that.
//
// The easiest way to do this is to just call `glXQueryVersion()` before doing anything
// else. See: https://www.virtualbox.org/ticket/8293
let (mut major, mut minor) = (0, 0);
unsafe {
glx.QueryVersion(display as *mut _, &mut major, &mut minor);
}
// loading the list of extensions
let extensions = unsafe {
let extensions = glx.QueryExtensionsString(display as *mut _, 0); // FIXME: screen number