Fix capes being scaled wrong and invisible skins (#1940)

* Fix capes being scaled wrong and invisible skins

* Flush old image objects

* Remove alpha workaround and fix more scaling issues

* Remove unnecessary scale

* Reduce diff

Co-authored-by: Camotoy <20743703+Camotoy@users.noreply.github.com>

connector/src/main/java/org/geysermc/connector/skin/SkinProvider.java

@@ -413,14 +413,23 @@ public class SkinProvider {
         // if the requested image is a cape
         if (provider != null) {
             if (image.getWidth() > 64) {
-                image = scale(image, 64, 32);
+                // Prevent weirdly-scaled capes from being cut off
+                BufferedImage newImage = new BufferedImage(128, 64, BufferedImage.TYPE_INT_ARGB);
+                Graphics g = newImage.createGraphics();
+                g.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
+                g.dispose();
+                image.flush();
+                image = scale(newImage, 64, 32);
             }
         } else {
             // Very rarely, skins can be larger than Minecraft's default.
             // Bedrock will not render anything above a width of 128.
             if (image.getWidth() > 128) {
-                image = scale(image, 128, image.getHeight() / (image.getWidth() / 128));
+                // On Height: Scale by the amount we divided width by, or simply cut down to 128
+                image = scale(image, 128, image.getHeight() >= 256 ? (image.getHeight() / (image.getWidth() / 128)) : 128);
             }
+
+            // TODO remove alpha channel
         }
 
         byte[] data = bufferedImageToImageData(image);