From 8d062a90b1ffbe9e00334fa3e9e939406bd32141 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Sun, 2 Feb 2025 16:00:15 +0100
Subject: screen: add vsync and double buffering

---
 src/screen/drm/event.zig | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/screen/drm/event.zig

(limited to 'src/screen/drm/event.zig')

diff --git a/src/screen/drm/event.zig b/src/screen/drm/event.zig
new file mode 100644
index 0000000..201ced3
--- /dev/null
+++ b/src/screen/drm/event.zig
@@ -0,0 +1,31 @@
+
+pub const EventType = enum(u32) {
+    vblank = 1,
+    page_flip_complete = 2,
+    crtc_sequence = 3,
+};
+
+pub const VBlankEvent = extern struct {
+    user_data: u64,
+    tv_sec: u32,
+    tv_usec: u32,
+    sequence: u32,
+    crtc_id: u32,
+};
+
+pub const CrtcSequenceEvent = extern struct {
+    user_data: u64,
+    time_ns: i64,
+    sequence: u64,
+};
+
+pub const EventPayload = extern union {
+    vblank: VBlankEvent,
+    crtc_sequence: CrtcSequenceEvent,
+};
+
+pub const Event = extern struct {
+    type: EventType,
+    length: u32,
+    payload: EventPayload,
+};
-- 
cgit v1.2.3-70-g09d2