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ssd: scale down button icons if necessary

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This allows using large XBM button icons (larger than
the button width / height) for high and mixed DPI usecases.

Instead of scaling up the low pixel icons when moving a window to a
high DPI output we scale the icons down when moving to a non-scaled
output. The user is still responsible to create / use larger XBM
icons for their theme.

Partly fixes #609
This commit is contained in:
Consolatis 2022-12-23 22:59:27 +01:00 • committed by Johan Malm
parent 86fa0c0a65
commit 0db67a508c
1 changed files with 37 additions and 3 deletions
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40
src/ssd/ssd_part.c
View file

@ -112,6 +112,34 @@ add_scene_button_corner(struct wl_list *part_list, enum ssd_part_type type,
return button_root;
}
static struct wlr_box
get_scale_box(struct wlr_buffer *buffer, double container_width,
double container_height)
{
struct wlr_box icon_geo = {
.width = buffer->width,
.height = buffer->height
};
/* Scale down buffer if required */
if (icon_geo.width && icon_geo.height) {
#define MIN(a, b) ((a) < (b) ? (a) : (b))
double scale = MIN(container_width / icon_geo.width,
container_height / icon_geo.height);
#undef MIN
if (scale < 1.0f) {
icon_geo.width = (double)icon_geo.width * scale;
icon_geo.height = (double)icon_geo.height * scale;
}
}
/* Center buffer on both axis */
icon_geo.x = (container_width - icon_geo.width) / 2;
icon_geo.y = (container_height - icon_geo.height) / 2;
return icon_geo;
}
struct ssd_part *
add_scene_button(struct wl_list *part_list, enum ssd_part_type type,
struct wlr_scene_tree *parent, float *bg_color,
@ -130,9 +158,15 @@ add_scene_button(struct wl_list *part_list, enum ssd_part_type type,
BUTTON_WIDTH, rc.theme->title_height, 0, 0, bg_color);
/* Icon */
add_scene_buffer(part_list, type, parent, icon_buffer,
(BUTTON_WIDTH - icon_buffer->width) / 2,
(rc.theme->title_height - icon_buffer->height) / 2);
struct wlr_box icon_geo = get_scale_box(icon_buffer,
BUTTON_WIDTH, rc.theme->title_height);
struct ssd_part *icon_part = add_scene_buffer(part_list, type,
parent, icon_buffer, icon_geo.x, icon_geo.y);
/* Make sure big icons are scaled down if necessary */
wlr_scene_buffer_set_dest_size(
wlr_scene_buffer_from_node(icon_part->node),
icon_geo.width, icon_geo.height);
/* Hover overlay */
hover = add_scene_rect(part_list, type, parent, BUTTON_WIDTH,