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feat: size arena to ~80% of output with resize-aware grid

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Store wl_output mode dimensions and compute the default logical window
size as 80% of the output divided by the active scale, with a fallback.
Grid dimensions continue to update on resize.
This commit is contained in:
Arek
2026-11-08 16:07:45 +01:00
parent 9583cab243
commit a607a2441c
2 changed files with 22 additions and 5 deletions
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wlgol.c
+18 -1
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@@ -31,6 +31,8 @@ struct xdg_wm_base *xdg_shell;
struct wl_seat *wl_seat;
struct wl_output *wl_output = NULL;
int output_scale_factor = 1;
int output_width = 0;
int output_height = 0;
struct keyboard_data keyboard_data;
struct pointer_data pointer_data;
@@ -83,7 +85,13 @@ struct wp_fractional_scale_v1 *fractional_scale = NULL;
// output listener
static void output_geometry_handler(void *data, struct wl_output *output, int32_t x, int32_t y, int32_t phys_w, int32_t phys_h, int32_t subpixel, const char *make, const char *model, int32_t transform) { (void)data;(void)output;(void)x;(void)y;(void)phys_w;(void)phys_h;(void)subpixel;(void)make;(void)model;(void)transform; }
static void output_mode_handler(void *data, struct wl_output *output, uint32_t flags, int32_t width, int32_t height, int32_t refresh) { (void)data;(void)output;(void)flags;(void)width;(void)height;(void)refresh; }
static void output_mode_handler(void *data, struct wl_output *output, uint32_t flags, int32_t width, int32_t height, int32_t refresh) {
(void)data;(void)output;(void)flags;(void)refresh;
if (width > 0 && height > 0) {
output_width = width;
output_height = height;
}
}
static void output_done_handler(void *data, struct wl_output *output) { (void)data;(void)output; }
static void output_scale_handler(void *data, struct wl_output *output, int32_t factor) {
(void)data;(void)output;
@@ -426,12 +434,21 @@ int main(void)
wl_pointer_add_listener(pointer_data.pointer, &pointer_listener, &pointer_data);
canvas.fd = -1;
logical_width = 1024;
logical_height = 576;
grid_init(&grid, logical_width / 8, logical_height / 8);
grid.show_lines = 1;
// wait for the surface to be configured
wl_display_roundtrip(display);
if (output_width > 0 && output_height > 0 && current_scale > 0) {
logical_width = (int)(output_width * 0.8 / current_scale);
logical_height = (int)(output_height * 0.8 / current_scale);
}
if (logical_width < 8) logical_width = 8;
if (logical_height < 8) logical_height = 8;
/* initial scale may arrive via fractional/output after roundtrip */
if (fractional_manager && !fractional_scale) {
/* already created above */