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Fallback to old extensions API if NUM_EXTENSIONS errors

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This commit is contained in:
Alan Jeffrey 2019-09-03 11:03:45 -05:00
parent 4f4e219e54
commit 1e3b08aae8
1 changed files with 5 additions and 0 deletions
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5
components/canvas/webgl_thread.rs
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@ -1727,6 +1727,11 @@ impl WebGLImpl {
unsafe { unsafe {
gl.get_integer_v(gl::NUM_EXTENSIONS, &mut ext_count); gl.get_integer_v(gl::NUM_EXTENSIONS, &mut ext_count);
} }
// Fall back to the depricated extensions API if that fails
if gl.get_error() != gl::NO_ERROR {
chan.send(gl.get_string(gl::EXTENSIONS)).unwrap();
return;
}
let ext_count = ext_count[0] as usize; let ext_count = ext_count[0] as usize;
let mut extensions = Vec::with_capacity(ext_count); let mut extensions = Vec::with_capacity(ext_count);
for idx in 0..ext_count { for idx in 0..ext_count {