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swaybg: implement scaling mode "fill"

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This commit is contained in:
Christoph Gysin 2015-11-25 20:52:34 +02:00
parent 904983c375
commit 81a87ec7a7
1 changed files with 23 additions and 0 deletions
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23
swaybg/main.c
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@ -14,6 +14,7 @@ struct registry *registry;
enum scaling_mode_t {
SCALING_MODE_STRETCH,
SCALING_MODE_FILL,
};
void sway_terminate(void) {
@ -61,6 +62,8 @@ int main(int argc, const char **argv) {
enum scaling_mode_t scaling_mode;
if (strcmp(scaling_mode_str, "stretch") == 0) {
scaling_mode = SCALING_MODE_STRETCH;
} else if (strcmp(scaling_mode_str, "fill") == 0) {
scaling_mode = SCALING_MODE_FILL;
} else {
sway_abort("Unsupported scaling mode: %s", scaling_mode_str);
}
@ -76,6 +79,26 @@ int main(int argc, const char **argv) {
(double) window->height / height);
cairo_set_source_surface(window->cairo, image, 0, 0);
break;
case SCALING_MODE_FILL:
{
double window_ratio = (double) window->width / window->height;
double bg_ratio = width / height;
if (window_ratio > bg_ratio) {
double scale = (double) window->width / width;
cairo_scale(window->cairo, scale, scale);
cairo_set_source_surface(window->cairo, image,
0,
(double) window->height/2 / scale - height/2);
} else {
double scale = (double) window->height / height;
cairo_scale(window->cairo, scale, scale);
cairo_set_source_surface(window->cairo, image,
(double) window->width/2 / scale - width/2,
0);
}
}
break;
default:
sway_abort("Scaling mode '%s' not implemented yet!", scaling_mode_str);
}