1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
use HeadlessRendererBuilder;
use CreationError;
use libc;
use std::{mem, ptr};
use super::ffi;
pub struct HeadlessContext {
context: ffi::OSMesaContext,
buffer: Vec<u32>,
width: uint,
height: uint,
}
impl HeadlessContext {
pub fn new(builder: HeadlessRendererBuilder) -> Result<HeadlessContext, CreationError> {
Ok(HeadlessContext {
width: builder.dimensions.0,
height: builder.dimensions.1,
buffer: Vec::from_elem(builder.dimensions.0 * builder.dimensions.1, unsafe { mem::uninitialized() }),
context: unsafe {
// TODO: check errors
ffi::OSMesaCreateContext(0x1908, ptr::null())
}
})
}
pub unsafe fn make_current(&self) {
ffi::OSMesaMakeCurrent(self.context,
self.buffer.as_ptr() as *mut libc::c_void,
0x1401, self.width as libc::c_int, self.height as libc::c_int);
}
pub fn get_proc_address(&self, addr: &str) -> *const () {
use std::c_str::ToCStr;
unsafe {
addr.with_c_str(|s| {
ffi::OSMesaGetProcAddress(mem::transmute(s)) as *const ()
})
}
}
}
impl Drop for HeadlessContext {
fn drop(&mut self) {
unsafe { ffi::OSMesaDestroyContext(self.context) }
}
}
|
