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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
const c = @import("c.zig").c;
pub const DisplayLink = opaque {
pub const Error = error{
CreationFailed,
InvalidOperation,
};
pub fn createWithActiveCGDisplays() Error!*DisplayLink {
var result: ?*DisplayLink = null;
if (c.CVDisplayLinkCreateWithActiveCGDisplays(
@ptrCast(&result),
) != c.kCVReturnSuccess)
return error.CreationFailed;
return result orelse error.CreationFailed;
}
pub fn release(self: *DisplayLink) void {
c.CVDisplayLinkRelease(@ptrCast(self));
}
pub fn start(self: *DisplayLink) Error!void {
if (c.CVDisplayLinkStart(@ptrCast(self)) != c.kCVReturnSuccess)
return error.InvalidOperation;
}
pub fn stop(self: *DisplayLink) Error!void {
if (c.CVDisplayLinkStop(@ptrCast(self)) != c.kCVReturnSuccess)
return error.InvalidOperation;
}
pub fn isRunning(self: *DisplayLink) bool {
return c.CVDisplayLinkIsRunning(@ptrCast(self)) != 0;
}
pub fn setCurrentCGDisplay(
self: *DisplayLink,
display_id: c.CGDirectDisplayID,
) Error!void {
if (c.CVDisplayLinkSetCurrentCGDisplay(
@ptrCast(self),
display_id,
) != c.kCVReturnSuccess)
return error.InvalidOperation;
}
// Note: this purposely throws away a ton of arguments I didn't need.
// It would be trivial to refactor this into Zig types and properly
// pass this through.
pub fn setOutputCallback(
self: *DisplayLink,
comptime Userdata: type,
comptime callbackFn: *const fn (*DisplayLink, ?*Userdata) void,
userinfo: ?*Userdata,
) Error!void {
if (c.CVDisplayLinkSetOutputCallback(
@ptrCast(self),
@ptrCast(&(struct {
fn callback(
displayLink: *DisplayLink,
inNow: *const c.CVTimeStamp,
inOutputTime: *const c.CVTimeStamp,
flagsIn: c.CVOptionFlags,
flagsOut: *c.CVOptionFlags,
inner_userinfo: ?*anyopaque,
) callconv(.c) c.CVReturn {
_ = inNow;
_ = inOutputTime;
_ = flagsIn;
_ = flagsOut;
callbackFn(
displayLink,
@ptrCast(@alignCast(inner_userinfo)),
);
return c.kCVReturnSuccess;
}
}).callback),
userinfo,
) != c.kCVReturnSuccess)
return error.InvalidOperation;
}
};
|
