wayland mouse input

src/gfx.h

@@ -95,6 +95,11 @@ typedef struct {
     struct wl_buffer *buffer;
     struct xdg_surface *xdg_surface;
     struct xdg_toplevel *xdg_toplevel;
+    struct wl_seat *seat;
+    struct wl_pointer *pointer;
+
+    int mouse_x, mouse_y;
+    int mouse_left_down, mouse_right_down;
 } _opengl_gfx_context_wayland;
 
 typedef struct {
@@ -607,6 +612,54 @@ static void _metal_gfx_update_buffer(_metal_gfx_context *cx,
     memcpy(buffer_contents, data, len);
 }
 #elif __linux__
+#include <linux/input-event-codes.h>
+
+static void _wayland_pointer_enter(void *data, struct wl_pointer *pointer,
+                                   uint32_t serial, struct wl_surface *surface,
+                                   wl_fixed_t x, wl_fixed_t y) {
+    fprintf(stderr, "pointer enter: %d, %d\n", x, y);
+}
+static void _wayland_pointer_leave(void *data, struct wl_pointer *pointer,
+                                   uint32_t serial,
+                                   struct wl_surface *surface) {
+    fprintf(stderr, "pointer leave\n");
+}
+static void _wayland_pointer_button(void *data, struct wl_pointer *pointer,
+                                    uint32_t serial, uint32_t time,
+                                    uint32_t button, uint32_t state) {
+    _opengl_gfx_context_wayland *cx = data;
+
+    if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
+        if (button == BTN_LEFT) {
+            cx->mouse_left_down = true;
+        } else if (button == BTN_RIGHT) {
+            cx->mouse_right_down = true;
+        }
+    } else if (state == WL_POINTER_BUTTON_STATE_RELEASED) {
+        if (button == BTN_LEFT) {
+            cx->mouse_left_down = false;
+        } else if (button == BTN_RIGHT) {
+            cx->mouse_right_down = false;
+        }
+    }
+}
+static void _wayland_pointer_axis(void *data, struct wl_pointer *pointer,
+                                  uint32_t time, uint32_t axis,
+                                  wl_fixed_t value) {}
+static void _wayland_pointer_motion(void *data, struct wl_pointer *pointer,
+                                    uint32_t time, wl_fixed_t x, wl_fixed_t y) {
+    _opengl_gfx_context_wayland *cx = data;
+    cx->mouse_x = wl_fixed_to_int(x);
+    cx->mouse_y = wl_fixed_to_int(y);
+}
+
+static const struct wl_pointer_listener pointer_listener = {
+    .enter = _wayland_pointer_enter,
+    .leave = _wayland_pointer_leave,
+    .motion = _wayland_pointer_motion,
+    .button = _wayland_pointer_button,
+    .axis = _wayland_pointer_axis,
+};
 
 static void _wayland_xdg_toplevel_configure(void *data,
                                             struct xdg_toplevel *xdg_toplevel,
@@ -659,6 +712,8 @@ static void _wayland_registry_handle_global(void *data,
     } else if (strcmp(interface, "xdg_wm_base") == 0) {
         d->wm_base =
             wl_registry_bind(registry, name, &xdg_wm_base_interface, 1);
+    } else if (strcmp(interface, "wl_seat") == 0) {
+        d->seat = wl_registry_bind(registry, name, &wl_seat_interface, 1);
     }
 }
 
@@ -685,9 +740,11 @@ _opengl_gfx_init_context_wayland(uint32_t width, uint32_t height) {
 
     // wait for all the globals to be registered
     wl_display_roundtrip(cx.display);
-
     xdg_wm_base_add_listener(cx.wm_base, &xdg_wm_base_listener, &cx);
 
+    cx.pointer = wl_seat_get_pointer(cx.seat);
+    wl_pointer_add_listener(cx.pointer, &pointer_listener, &cx);
+
     cx.surface = wl_compositor_create_surface(cx.compositor);
     cx.xdg_surface = xdg_wm_base_get_xdg_surface(cx.wm_base, cx.surface);
     xdg_surface_add_listener(cx.xdg_surface, &xdg_surface_listener, &cx);
@@ -705,12 +762,14 @@ _opengl_gfx_init_context_wayland(uint32_t width, uint32_t height) {
     ftruncate(fd, size);
 
     uint8_t *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    data[0] = 255;
+    for (int i = 0; i < size; ++i) {
+        data[i] = 255;
+    }
 
     cx.shared_memory_pool = wl_shm_create_pool(cx.shared_memory, fd, size);
     cx.buffer =
         wl_shm_pool_create_buffer(cx.shared_memory_pool, 0, width, height,
-                                  width * 4, WL_SHM_FORMAT_XRGB8888);
+                                  width * 4, WL_SHM_FORMAT_ARGB8888);
 
     wl_surface_attach(cx.surface, cx.buffer, 0, 0);
     wl_surface_commit(cx.surface);