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const std = @import("std");
const os = std.os.linux;
const Drm = @import("request.zig").Drm;
const Card = @import("card.zig").Card;
const RawConnector = extern struct {
encoder_ids: ?*u32,
modes: ?*ModeInfo,
prop_ids: ?*u32,
prop_value_ids: ?*u64,
count_modes: u32,
count_props: u32,
count_encoders: u32,
encoder_id: u32,
connector_id: u32,
connector_type: u32,
connector_type_id: u32,
connection: Connection,
mm_width: u32,
mm_height: u32,
subpixel: u32,
pad: u32,
};
const Connection = enum(u32) {
undefined_state = 0,
connected = 1,
disconnected = 2,
unknown = 3,
};
const ModeInfo = extern struct {
const Self = @This();
const Flags = packed struct(u32) {
phsync: bool,
nhsync: bool,
pvsync: bool,
nvsync: bool,
interlace: bool,
dblscan: bool,
csync: bool,
pcsync: bool,
ncsync: bool,
hskew: bool,
bcast: bool,
pixmux: bool,
dblclk: bool,
clkdiv2: bool,
_padding: u18,
};
clock: u32,
hdisplay: u16,
hsync_start: u16,
hsync_end: u16,
htotal: u16,
hskew: u16,
vdisplay: u16,
vsync_start: u16,
vsync_end: u16,
vtotal: u16,
vscan: u16,
vrefresh: u32,
flags: Flags,
type: u32,
name: [32]u8,
pub fn frame_rate(self: *const Self) f32 {
var rate = (@as(u64, @intCast(self.clock)) * 1000000 / self.htotal + self.vtotal / 2) / self.vtotal;
if (self.flags.interlace) {
rate *= 2;
}
if (self.flags.dblscan) {
rate /= 2;
}
if (self.vscan > 1) {
rate /= self.vscan;
}
return @as(f32, @floatFromInt(rate)) / 1000.0;
}
};
pub const Connector = struct {
const Self = @This();
card: *Card,
encoder_ids: []u32,
modes: []ModeInfo,
prop_ids: []u32,
prop_value_ids: []u64,
encoder_id: u32,
connector_id: u32,
connector_type: u32,
connector_type_id: u32,
connection: Connection,
mm_width: u32,
mm_height: u32,
subpixel: u32,
pad: u32,
pub fn raw_without_ids(card: *Card, id: u32) !RawConnector {
var result = std.mem.zeroInit(RawConnector, .{ .connector_id = id });
try Drm.get_connector.request(card.file.handle, RawConnector, &result);
return result;
}
// NOTE: This function does not take in account
// that there might be some hot-plugging going
// on. This might have to change in the future.
pub fn init(card: *Card, id: u32) !Self {
var raw = try Self.raw_without_ids(card, id);
const resources = .{
.encoder_ids = try card.allocator.alloc(u32, raw.count_encoders),
.modes = try card.allocator.alloc(ModeInfo, raw.count_modes),
.prop_ids = try card.allocator.alloc(u32, raw.count_props),
.prop_value_ids = try card.allocator.alloc(u64, raw.count_props),
.encoder_id = raw.encoder_id,
.connector_id = raw.connector_id,
.connector_type = raw.connector_type,
.connector_type_id = raw.connector_type_id,
.connection = raw.connection,
.mm_width = raw.mm_width,
.mm_height = raw.mm_height,
.subpixel = raw.subpixel,
.pad = raw.pad,
.card = card,
};
@memset(resources.encoder_ids, 0);
@memset(resources.modes, std.mem.zeroes(ModeInfo));
@memset(resources.prop_ids, 0);
@memset(resources.prop_value_ids, 0);
raw.encoder_ids = @ptrCast(resources.encoder_ids);
raw.modes = @ptrCast(resources.modes);
raw.prop_ids = @ptrCast(resources.prop_ids);
raw.prop_value_ids = @ptrCast(resources.prop_value_ids);
try Drm.get_connector.request(card.file.handle, RawConnector, &raw);
return resources;
}
pub fn deinit(self: *Self) void {
self.card.allocator.free(self.encoder_ids);
self.card.allocator.free(self.modes);
self.card.allocator.free(self.prop_ids);
}
};
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