Add dynamic background image resizing to fancy launcher (SKCraft#437)

joshricker · Dec 12, 2021 · 8c9f903 · 8c9f903
2 parents 1ae2993 + 2ffdd4e
commit 8c9f903
Showing 1 changed file with 29 additions and 2 deletions.
diff --git a/launcher-fancy/src/main/java/com/skcraft/launcher/FancyBackgroundPanel.java b/launcher-fancy/src/main/java/com/skcraft/launcher/FancyBackgroundPanel.java
@@ -27,8 +27,35 @@ public FancyBackgroundPanel() {
     protected void paintComponent(Graphics g) {
         super.paintComponent(g);
         if (background != null) {
-            g.drawImage(background, 0, 0, null);
+            double multi;
+            int w, h;
+
+            // Calculate Aspect Ratio Multiplier depending on window size
+            if (this.getHeight() <= this.getWidth()) {
+                multi = this.getWidth() / (float)background.getWidth(null);
+            }
+            else {
+                multi = this.getHeight() / (float)background.getHeight(null);
+            }
+
+            // Calculate new width and height
+            w = (int) Math.floor((float)background.getWidth(null) * multi);
+            h = (int) Math.floor((float)background.getHeight(null) * multi);
+
+            // Check if it needs to be switched (eg. in case of a square window)
+            if (h < this.getHeight() || w < this.getWidth()) {
+                if (h < this.getHeight()) {
+                    multi = this.getHeight() / (float)background.getHeight(null);
+                }
+                else if (w < this.getWidth()) {
+                    multi = this.getWidth() / (float) background.getWidth(null);
+                }
+
+                w = (int) Math.floor((float)background.getWidth(null) * multi);
+                h = (int) Math.floor((float)background.getHeight(null) * multi);
+            }
+
+            g.drawImage(background, 0, 0, w, h,null);
         }
     }
-
 }