From 44acb94e4339e240bb9e7f93d14a7757e2db8962 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Wed, 12 Oct 2022 13:30:28 +0200
Subject: [WIP] Add handling of absolute mouse position (touch/graphic tablets)

---
 src/main.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/src/main.c b/src/main.c
index f2d373b..cdc8530 100644
--- a/src/main.c
+++ b/src/main.c
@@ -83,11 +83,12 @@ init_input(void) {
         // fprintf(stderr, "error: couldn't open keyboard %s: %s.\n", KBD_PATH, strerror(errno));
     }
 
-    in.mouse_fd = open(MOUSE_PATH, O_RDONLY | O_NONBLOCK);
+    // in.mouse_fd = open(MOUSE_PATH, O_RDONLY | O_NONBLOCK);
+    in.mouse_fd = open("/dev/input/event2", O_RDONLY | O_NONBLOCK);
     if (in.mouse_fd == -1) {
         // NOTE: Some applications may not require a mouse so this is
         //       optional, but we are still displaying an error.
-        // fprintf(stderr, "error: couldn't open mouse %s: %s.\n", MOUSE_PATH, strerror(errno));
+        fprintf(stderr, "error: couldn't open mouse %s: %s.\n", MOUSE_PATH, strerror(errno));
     }
 }
 
@@ -116,6 +117,7 @@ poll_mouse(void) {
     struct input_event mouse_event;
     if (read(in.mouse_fd, &mouse_event, sizeof(mouse_event)) != -1) {
         if (mouse_event.type == EV_REL) {
+            printf("MOUSE REL EVENT\n");
             if (mouse_event.code == REL_X) {
                 in.mouse.x = CLAMP(
                     in.mouse.x + (s32)mouse_event.value, 0, (s32)screen_width);
@@ -124,6 +126,7 @@ poll_mouse(void) {
                     in.mouse.y + (s32)mouse_event.value, 0, (s32)screen_height);
             }
         } else if (mouse_event.type == EV_KEY) {
+            printf("MOUSE KEY EVENT\n");
             switch (mouse_event.code) {
                 case BTN_LEFT: {
                     if (mouse_event.value == 1) {
@@ -141,17 +144,21 @@ poll_mouse(void) {
                 } break;
                 default: break;
             }
+        } else if (mouse_event.type == EV_ABS) {
+            printf("MOUSE ABS EVENT\n");
+            if (mouse_event.code == ABS_X) {
+                in.mouse.x = CLAMP((s32)mouse_event.value, 0, (s32)screen_width);
+            } else  if (mouse_event.code == ABS_Y) {
+                in.mouse.y = CLAMP((s32)mouse_event.value, 0, (s32)screen_height);
+            }
         }
         in.mouse.update = true;
-        // DEBUG:
-        // printf("MOUSE: (type: %d, code: %d, value: %d)\n",
-        //         mouse_event.type, mouse_event.code, mouse_event.value);
     }
 }
 
 void
 poll_input(void) {
-    poll_keyboard();
+    // poll_keyboard();
     poll_mouse();
 }
 
-- 
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