1 files changed, 59 insertions, 0 deletions
diff --git a/src/screen/drm/connector/mode.zig b/src/screen/drm/connector/mode.zig
new file mode 100644
index 0000000..9f4dfc4
--- /dev/null
+++ b/src/screen/drm/connector/mode.zig
@@ -0,0 +1,59 @@
+pub const Mode = extern struct {
+    const Self = @This();
+
+    const DimensionInfo = extern struct {
+        const Sync = extern struct { start: u16, end: u16 };
+
+        size: u16,
+        sync: Sync,
+        total: u16,
+    };
+
+    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,
+    horizontal: DimensionInfo,
+    skew: u16,
+    vertical: DimensionInfo,
+    line_scans: u16,
+    vertical_refresh: 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.horizontal.total + self.vertical.total / 2) / self.vertical.total;
+
+        if (self.flags.interlace) {
+            rate *= 2;
+        }
+
+        if (self.flags.dblscan) {
+            rate /= 2;
+        }
+
+        if (self.line_scans > 1) {
+            rate /= self.line_scans;
+        }
+
+        return @as(f32, @floatFromInt(rate)) / 1000.0;
+    }
+};
+