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Implement vsync for x11 and add vsync example

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This commit is contained in:
Pierre Krieger 2015-01-23 09:31:05 +01:00
parent 1d6b863cd4
commit b05ef16d81
4 changed files with 96 additions and 2 deletions
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47
src/x11/window/mod.rs
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@ -298,7 +298,7 @@ impl Window {
// creating GL context
let context = unsafe {
let (context, extra_functions) = unsafe {
let mut attributes = Vec::new();
if builder.gl_version.is_some() {
@ -345,9 +345,52 @@ impl Window {
return Err(OsError(format!("GL context creation failed")));
}
context
(context, extra_functions)
};
// vsync
if builder.vsync {
unsafe { ffi::glx::MakeCurrent(display, window, context) };
if extra_functions.SwapIntervalEXT.is_loaded() {
// this should be the most common extension
unsafe {
extra_functions.SwapIntervalEXT(display as *mut _, window, 1);
}
// checking that it worked
if builder.strict {
let mut swap = unsafe { mem::uninitialized() };
unsafe {
ffi::glx::QueryDrawable(display, window,
ffi::glx_extra::SWAP_INTERVAL_EXT as i32,
&mut swap);
}
if swap != 1 {
return Err(OsError(format!("Couldn't setup vsync: expected \
interval `1` but got `{}`", swap)));
}
}
// GLX_MESA_swap_control is not official
/*} else if extra_functions.SwapIntervalMESA.is_loaded() {
unsafe {
extra_functions.SwapIntervalMESA(1);
}*/
} else if extra_functions.SwapIntervalSGI.is_loaded() {
unsafe {
extra_functions.SwapIntervalSGI(1);
}
} else if builder.strict {
return Err(OsError(format!("Couldn't find any available vsync extension")));
}
unsafe { ffi::glx::MakeCurrent(display, 0, ptr::null()) };
}
// creating the window object
let window = Window {
x: Arc::new(XWindow {