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authorPierre Krieger <pierre.krieger1708@gmail.com>2015-01-23 09:31:05 +0100
committerPierre Krieger <pierre.krieger1708@gmail.com>2015-01-23 09:33:22 +0100
commitb05ef16d817af85d175d60422591d90fe3ec4218 (patch)
treeb0a55aecc955cfadbebcc20183c9a7eabdcc033b /src/x11/window
parent1d6b863cd454839b8e3cf1e296cbf8f31fb70029 (diff)
downloadglutin-b05ef16d817af85d175d60422591d90fe3ec4218.tar.gz
glutin-b05ef16d817af85d175d60422591d90fe3ec4218.zip
Implement vsync for x11 and add vsync example
Diffstat (limited to 'src/x11/window')
-rw-r--r--src/x11/window/mod.rs47
1 files changed, 45 insertions, 2 deletions
diff --git a/src/x11/window/mod.rs b/src/x11/window/mod.rs
index f4c296a..d3c5163 100644
--- a/src/x11/window/mod.rs
+++ b/src/x11/window/mod.rs
@@ -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 {