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const std = @import("std");
const os = std.os.linux;
const cerror = @import("../cerror.zig");
const Resources = @import("resources.zig").Resources;
const Connector = @import("connector/root.zig").Connector;
const Encoder = @import("encoder/root.zig").Encoder;
const Crtc = @import("crtc/root.zig").Crtc;
const DoubleBuffer = @import("frame-buffer/root.zig").DoubleBuffer;
const Event = @import("event.zig").Event;
pub const Card = struct {
const Self = @This();
file: std.fs.File,
allocator: std.mem.Allocator,
pub fn open(name: []const u8, allocator: std.mem.Allocator) !Self {
var dri_dir = try std.fs.openDirAbsolute("/dev/dri", .{});
defer dri_dir.close();
return .{
.file = try dri_dir.openFile(name, .{
.mode = .read_write,
.lock_nonblocking = true,
}),
.allocator = allocator,
};
}
pub fn close(self: *Card) void {
self.file.close();
}
pub fn is_kms(self: *Card) !bool {
const raw_info = Resources.raw_without_ids(self);
return raw_info.count_crtcs > 0 and raw_info.count_connectors > 0 and raw_info.count_encoders > 0;
}
pub fn resources(self: *Card) !Resources {
return Resources.init(self);
}
pub fn connector(self: *Card, id: u32) !Connector {
return Connector.init(self, id);
}
pub fn encoder(self: *Card, id: u32) !Encoder {
return Encoder.init(self, id);
}
pub fn crtc(self: *Card, id: u32) !Crtc {
return Crtc.init(self, id);
}
pub fn create_double_buffer(self: *Card, width: u32, height: u32, bpp: u32) !DoubleBuffer {
return DoubleBuffer.init(self, width, height, bpp);
}
pub fn poll_event(self: *Card, timeout: i32) !?Event {
var pollfd = os.pollfd {
.fd = self.file.handle,
.events = os.POLL.IN,
.revents = 0
};
try cerror.from_usize(os.poll(@ptrCast(&pollfd), 1, timeout));
if ((pollfd.revents & os.POLL.IN) != 0) {
var event = std.mem.zeroes(Event);
try cerror.from_usize(os.read(self.file.handle, @ptrCast(&event), @sizeOf(Event)));
return event;
}
return null;
}
};
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