swaybg: implement scaling mode "center"

1 files changed, 8 insertions, 0 deletions

diff --git a/swaybg/main.c b/swaybg/main.c
index a85c56bd..481fdf9a 100644
--- a/swaybg/main.c
+++ b/swaybg/main.c
@@ -15,6 +15,7 @@ struct registry *registry;
 enum scaling_mode_t {
         SCALING_MODE_STRETCH,
         SCALING_MODE_FILL,
+        SCALING_MODE_CENTER,
 };
 
 void sway_terminate(void) {
@@ -64,6 +65,8 @@ int main(int argc, const char **argv) {
                 scaling_mode = SCALING_MODE_STRETCH;
         } else if (strcmp(scaling_mode_str, "fill") == 0) {
                 scaling_mode = SCALING_MODE_FILL;
+        } else if (strcmp(scaling_mode_str, "center") == 0) {
+                scaling_mode = SCALING_MODE_CENTER;
         } else {
                 sway_abort("Unsupported scaling mode: %s", scaling_mode_str);
         }
@@ -99,6 +102,11 @@ int main(int argc, const char **argv) {
                                                 }
                                         }
                                         break;
+                                case SCALING_MODE_CENTER:
+                                        cairo_set_source_surface(window->cairo, image,
+                                                        (double) window->width/2 - width/2,
+                                                        (double) window->height/2 - height/2);
+                                        break;
                                 default:
                                         sway_abort("Scaling mode '%s' not implemented yet!", scaling_mode_str);
                         }