add head endpoint and finish the body renderer

src/main/java/cc.fascinated/common/ImageUtils.java

@@ -24,4 +24,18 @@ public class ImageUtils {
         graphics.dispose();
         return scaled;
     }
+
+    /**
+     * Flip an image.
+     *
+     * @param src the source image
+     * @return the flipped image
+     */
+    public static BufferedImage flip(@NotNull final BufferedImage src) {
+        BufferedImage flipped = new BufferedImage(src.getWidth(), src.getHeight(), BufferedImage.TYPE_INT_ARGB);
+        Graphics2D graphics = flipped.createGraphics();
+        graphics.drawImage(src, src.getWidth(), 0, 0, src.getHeight(), 0, 0, src.getWidth(), src.getHeight(), null);
+        graphics.dispose();
+        return flipped;
+    }
 }

src/main/java/cc.fascinated/model/cache/CachedPlayer.java

@@ -27,8 +27,8 @@ public final class CachedPlayer extends Player implements Serializable {
      */
     private long cached;
 
-    public CachedPlayer(UUID uniqueId, String username, Skin skin, Cape cape, MojangProfile.ProfileProperty[] rawProperties, long cached) {
-        super(uniqueId, username, skin, cape, rawProperties);
+    public CachedPlayer(UUID uniqueId, String trimmedUniqueId, String username, Skin skin, Cape cape, MojangProfile.ProfileProperty[] rawProperties, long cached) {
+        super(uniqueId, trimmedUniqueId, username, skin, cape, rawProperties);
         this.cached = cached;
     }
 }

src/main/java/cc.fascinated/model/player/Skin.java

@@ -4,7 +4,8 @@ import cc.fascinated.common.PlayerUtils;
 import cc.fascinated.config.Config;
 import cc.fascinated.exception.impl.BadRequestException;
 import cc.fascinated.service.skin.SkinRenderer;
-import cc.fascinated.service.skin.impl.SquareRenderer;
+import cc.fascinated.service.skin.impl.BodyRenderer;
+import cc.fascinated.service.skin.impl.HeadRenderer;
 import cc.fascinated.service.skin.impl.IsometricHeadRenderer;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
@@ -14,6 +15,9 @@ import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.extern.log4j.Log4j2;
 
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -36,6 +40,11 @@ public class Skin {
      */
     private Model model;
 
+    /**
+     * The legacy status of the skin
+     */
+    private boolean isLegacy = false;
+
     /**
      * The skin image for the skin
      */
@@ -53,6 +62,14 @@ public class Skin {
         this.model = model;
 
         this.skinImage = PlayerUtils.getSkinImage(url);
+        if (this.skinImage != null) {
+            try {
+                BufferedImage image = ImageIO.read(new ByteArrayInputStream(this.skinImage));
+                if (image.getWidth() == 64 && image.getHeight() == 32) { // Using the old skin format
+                    this.isLegacy = true;
+                }
+            } catch (Exception ignored) {}
+        }
     }
 
     /**
@@ -91,17 +108,14 @@ public class Skin {
      */
     @Getter @AllArgsConstructor
     public enum Parts {
+        FACE(new HeadRenderer()),
+        HEAD(new IsometricHeadRenderer()),
+        BODY(new BodyRenderer());
 
         /**
-         * Head parts
+         * The skin part renderer for the part.
          */
-        HEAD(new SquareRenderer(8, 8, 8)),
-        HEAD_ISOMETRIC(new IsometricHeadRenderer());
-
-        /**
-         * The skin part parser for the part.
-         */
-        private final SkinRenderer skinPartParser;
+        private final SkinRenderer skinRenderer;
 
         /**
          * Gets the name of the part.
@@ -129,6 +143,77 @@ public class Skin {
         }
     }
 
+    @AllArgsConstructor @Getter
+    public enum PartPosition {
+        /**
+         * Skin postions
+         */
+        HEAD(8, 8, 8, 8, new LegacyPartPositionData(8, 8, false)),
+        HEAD_TOP(8, 0, 8, 8, null),
+        HEAD_FRONT(8, 8, 8, 8, null),
+        HEAD_RIGHT(0, 8, 8, 8, null),
+
+        BODY(20, 20, 8, 12, new LegacyPartPositionData(20, 20, false)),
+        BODY_BACK(20, 36, 8, 12, null),
+        BODY_LEFT(32, 52, 8, 12, null),
+        BODY_RIGHT(44, 20, 8, 12, null),
+
+        RIGHT_ARM(44, 20, 4, 12, new LegacyPartPositionData(44, 20, false)),
+        LEFT_ARM(36, 52, 4, 12, new LegacyPartPositionData(43, 20, true)),
+
+        RIGHT_LEG(4, 20, 4, 12, new LegacyPartPositionData(4, 20, false)),
+        LEFT_LEG(20, 52, 4, 12, new LegacyPartPositionData(3, 20, true)),
+
+        /**
+         * Skin overlay (layer) positions
+         */
+        HEAD_OVERLAY(40, 8, 8, 8, null),
+        // todo: finish these below
+        HEAD_OVERLAY_TOP(40, 0, 40, 0, null),
+        HEAD_OVERLAY_FRONT(40, 8, 40, 8, null),
+        HEAD_OVERLAY_RIGHT(32, 8, 32, 8, null),
+
+        BODY_OVERLAY(20, 32, 20, 12, null),
+        BODY_OVERLAY_BACK(20, 36, 20, 12, null),
+        BODY_OVERLAY_LEFT(32, 52, 32, 12, null),
+        BODY_OVERLAY_RIGHT(44, 32, 44, 12, null),
+
+        RIGHT_ARM_OVERLAY(44, 32, 44, 12, null),
+        LEFT_ARM_OVERLAY(36, 52, 36, 12, null),
+
+        RIGHT_LEG_OVERLAY(4, 32, 4, 12, null),
+        LEFT_LEG_OVERLAY(20, 52, 20, 12, null);
+
+        /**
+         * The x, and y position of the part.
+         */
+        private final int x, y;
+
+        /**
+         * The width and height of the part.
+         */
+        private final int width, height;
+
+        /*
+         * The part position data for legacy skins.
+         * This can be null to use the default position.
+         */
+        private final LegacyPartPositionData legacyData;
+    }
+
+    @AllArgsConstructor @Getter
+    public static class LegacyPartPositionData {
+        /**
+         * The x, and y position of the part.
+         */
+        private int x, y;
+
+        /**
+         * Should the part be flipped?
+         */
+        private boolean flipped;
+    }
+
     /**
      * The model of the skin.
      */

src/main/java/cc.fascinated/service/PlayerService.java

@@ -71,6 +71,7 @@ public class PlayerService {
             Tuple<Skin, Cape> skinAndCape = mojangProfile.getSkinAndCape();
             CachedPlayer player = new CachedPlayer(
                     uuid, // Player UUID
+                    UUIDUtils.removeDashes(uuid), // Trimmed UUID
                     mojangProfile.getName(), // Player Name
                     skinAndCape.getLeft(), // Skin
                     skinAndCape.getRight(), // Cape
@@ -134,7 +135,7 @@ public class PlayerService {
         }
 
         long before = System.currentTimeMillis();
-        byte[] skinPartBytes = part.getSkinPartParser().renderPart(player.getSkin(), part.getName(), renderOverlay, size);
+        byte[] skinPartBytes = part.getSkinRenderer().renderPart(player.getSkin(), part.getName(), renderOverlay, size);
         log.info("Took {}ms to render skin part {} for player: {}", System.currentTimeMillis() - before, part.getName(), player.getUniqueId());
         CachedPlayerSkinPart skinPart = new CachedPlayerSkinPart(
                 key,

src/main/java/cc.fascinated/service/skin/SkinRenderer.java

@@ -8,6 +8,7 @@ import lombok.Getter;
 import lombok.extern.log4j.Log4j2;
 
 import javax.imageio.ImageIO;
+import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -15,21 +16,47 @@ import java.io.ByteArrayOutputStream;
 @AllArgsConstructor @Getter @Log4j2
 public abstract class SkinRenderer {
 
+    /**
+     * Gets the skin image.
+     *
+     * @param skin the skin
+     * @return the skin image
+     */
+    public BufferedImage getSkinImage(Skin skin) {
+        try {
+            return ImageIO.read(new ByteArrayInputStream(skin.getSkinImage()));
+        } catch (Exception ex) {
+            return null;
+        }
+    }
+
     /**
      * Gets the skin part image.
      *
      * @param skin the skin
-     * @param x the x position
-     * @param y the y position
-     * @param width the width
-     * @param height the height
+     * @param position the part position information
      * @param scale the scale
      * @return the skin part image
      */
-    public BufferedImage getSkinPart(Skin skin, int x, int y, int width, int height, double scale) {
+    public BufferedImage getSkinPart(Skin skin, Skin.PartPosition position, double scale) {
         try {
-            BufferedImage skinImage = ImageIO.read(new ByteArrayInputStream(skin.getSkinImage()));
-            BufferedImage part = skinImage.getSubimage(x, y, width, height);
+            BufferedImage skinImage = this.getSkinImage(skin);
+            if (skinImage == null) {
+                return null;
+            }
+            BufferedImage part;
+            Skin.LegacyPartPositionData legacyData = position.getLegacyData();
+            if (skin.isLegacy() && legacyData != null) {
+                part = skinImage.getSubimage(legacyData.getX(), legacyData.getY(), position.getWidth(), position.getHeight());
+                if (legacyData.isFlipped()) {
+                    part = ImageUtils.flip(part);
+                }
+            } else {
+                part = skinImage.getSubimage(position.getX(), position.getY(), position.getWidth(), position.getHeight());
+            }
+            if (part == null) {
+                return null;
+            }
             return ImageUtils.resize(part, scale);
         } catch (Exception ex) {
             return null;
@@ -56,6 +83,20 @@ public abstract class SkinRenderer {
         }
     }
 
+    /**
+     * Applies an overlay (skin layer) to the head part.
+     *
+     * @param graphics the graphics
+     * @param part the part
+     */
+    public void applyOverlay(Graphics2D graphics, BufferedImage part) {
+        if (part == null) {
+            return;
+        }
+        graphics.drawImage(part, 0, 0, null);
+        graphics.dispose();
+    }
+
     /**
      * Renders a skin part.
      *

src/main/java/cc.fascinated/service/skin/impl/BodyRenderer.java

@@ -0,0 +1,55 @@
+package cc.fascinated.service.skin.impl;
+
+import cc.fascinated.common.ImageUtils;
+import cc.fascinated.model.player.Skin;
+import cc.fascinated.service.skin.SkinRenderer;
+import lombok.Getter;
+import lombok.extern.log4j.Log4j2;
+
+import java.awt.*;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+
+@Getter @Log4j2
+public class BodyRenderer extends SkinRenderer {
+
+    private static final int WIDTH = 16;
+    private static final int HEIGHT = 32;
+
+    @Override
+    public byte[] renderPart(Skin skin, String partName, boolean renderOverlay, int size) {
+        log.info("Getting {} part bytes for {} with size {}", partName, skin.getUrl(), size);
+        try {
+            BufferedImage outputImage = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_ARGB);
+            Graphics2D graphics = outputImage.createGraphics();
+
+            // Get all the required body parts
+            BufferedImage head = this.getSkinPart(skin, Skin.PartPosition.HEAD, 1);
+            BufferedImage body = this.getSkinPart(skin, Skin.PartPosition.BODY, 1);
+            BufferedImage rightArm = this.getSkinPart(skin, Skin.PartPosition.RIGHT_ARM, 1);
+            BufferedImage leftArm = this.getSkinPart(skin, Skin.PartPosition.LEFT_ARM, 1);
+            BufferedImage rightLeg = this.getSkinPart(skin, Skin.PartPosition.RIGHT_LEG, 1);
+            BufferedImage leftLeg = this.getSkinPart(skin, Skin.PartPosition.LEFT_LEG, 1);
+
+            if (renderOverlay) { // Render the skin layers
+                Graphics2D overlayGraphics = head.createGraphics();
+
+                applyOverlay(overlayGraphics, this.getSkinPart(skin, Skin.PartPosition.HEAD_OVERLAY, 1));
+            }
+
+            // Draw the body
+            graphics.drawImage(head, 4, 0, null);
+            graphics.drawImage(body, 4, 8, null);
+            graphics.drawImage(rightArm, 0, 8, null);
+            graphics.drawImage(leftArm, 12, 8, null);
+            graphics.drawImage(rightLeg, 4, 20, null);
+            graphics.drawImage(leftLeg, 8, 20, null);
+
+            graphics.dispose(); // Clean up
+            return super.getBytes(ImageUtils.resize(outputImage, (double) size / HEIGHT), skin, partName);
+        } catch (Exception ex) {
+            log.error("Failed to get {} part bytes for {}", partName, skin.getUrl(), ex);
+            throw new RuntimeException("Failed to get " + partName + " part for " + skin.getUrl());
+        }
+    }
+}

src/main/java/cc.fascinated/service/skin/impl/HeadRenderer.java

@@ -10,34 +10,11 @@ import java.awt.geom.AffineTransform;
 import java.awt.image.BufferedImage;
 
 @Getter @Log4j2
-public class SquareRenderer extends SkinRenderer {
-
-    /**
-     * The x and y position of the part.
-     */
-    private final int x, y;
-
-    /**
-     * The width and height of the part.
-     */
-    private final int widthAndHeight;
-
-    /**
-     * Constructs a new {@link SquareRenderer}.
-     *
-     * @param x the x position of the part
-     * @param y the y position of the part
-     * @param widthAndHeight the width and height of the part
-     */
-    public SquareRenderer(int x, int y, int widthAndHeight) {
-        this.x = x;
-        this.y = y;
-        this.widthAndHeight = widthAndHeight;
-    }
+public class HeadRenderer extends SkinRenderer {
 
     @Override
     public byte[] renderPart(Skin skin, String partName, boolean renderOverlay, int size) {
-        double scale = (double) size / this.widthAndHeight;
+        double scale = (double) size / 8d;
         log.info("Getting {} part bytes for {} with size {} and scale {}", partName, skin.getUrl(), size, scale);
 
         try {
@@ -45,7 +22,11 @@ public class SquareRenderer extends SkinRenderer {
             Graphics2D graphics = outputImage.createGraphics();
 
             graphics.setTransform(AffineTransform.getScaleInstance(scale, scale));
-            graphics.drawImage(this.getSkinPart(skin, this.x, this.y, this.widthAndHeight, this.widthAndHeight, 1), 0, 0, null);
+            graphics.drawImage(this.getSkinPart(skin, Skin.PartPosition.HEAD, 1), 0, 0, null);
+
+            if (renderOverlay) { // Render the skin layers
+                applyOverlay(outputImage.createGraphics(), this.getSkinPart(skin, Skin.PartPosition.HEAD_OVERLAY, 1));
+            }
 
             return super.getBytes(outputImage, skin, partName);
         } catch (Exception ex) {

src/main/java/cc.fascinated/service/skin/impl/IsometricHeadRenderer.java

@@ -13,7 +13,7 @@ import java.awt.image.BufferedImage;
 @Getter @Log4j2
 public class IsometricHeadRenderer extends SkinRenderer {
 
-    private static final double SKEW_A = 26d / 45d;    // 0.57777777
+    private static final double SKEW_A = 26d / 45d;   // 0.57777777
     private static final double SKEW_B = SKEW_A * 2d; // 1.15555555
 
     /**
@@ -36,19 +36,19 @@ public class IsometricHeadRenderer extends SkinRenderer {
             Graphics2D graphics = outputImage.createGraphics();
 
             // Get all the required head parts
-            BufferedImage headTop = ImageUtils.resize(this.getSkinPart(skin, 8, 0, 8, 8, 1), scale);
-            BufferedImage headFront = ImageUtils.resize(this.getSkinPart(skin, 8, 8, 8, 8, 1), scale);
-            BufferedImage headRight = ImageUtils.resize(this.getSkinPart(skin, 0, 8, 8, 8, 1), scale);
+            BufferedImage headTop = ImageUtils.resize(this.getSkinPart(skin, Skin.PartPosition.HEAD_TOP, 1), scale);
+            BufferedImage headFront = ImageUtils.resize(this.getSkinPart(skin, Skin.PartPosition.HEAD_FRONT, 1), scale);
+            BufferedImage headRight = ImageUtils.resize(this.getSkinPart(skin, Skin.PartPosition.HEAD_RIGHT, 1), scale);
 
-            if (renderOverlay) {
+            if (renderOverlay) { // Render the skin layers
                 Graphics2D headGraphics = headTop.createGraphics();
-                applyOverlay(headGraphics,this.getSkinPart(skin, 40, 0, 8, 8, 1));
+                applyOverlay(headGraphics, this.getSkinPart(skin, Skin.PartPosition.HEAD_OVERLAY, 1));
 
                 headGraphics = headFront.createGraphics();
-                applyOverlay(headGraphics, this.getSkinPart(skin, 16, 8, 8, 8, 1));
+                applyOverlay(headGraphics, this.getSkinPart(skin, Skin.PartPosition.HEAD_OVERLAY_FRONT, 1));
 
                 headGraphics = headRight.createGraphics();
-                applyOverlay(headGraphics, this.getSkinPart(skin, 32, 8, 8, 8, 1));
+                applyOverlay(headGraphics, this.getSkinPart(skin, Skin.PartPosition.HEAD_OVERLAY_RIGHT, 1));
             }
 
             // Draw the head
@@ -77,17 +77,6 @@ public class IsometricHeadRenderer extends SkinRenderer {
         }
     }
 
-    /**
-     * Applies an overlay (skin layer) to the head part.
-     *
-     * @param graphics the graphics
-     * @param part the part
-     */
-    private void applyOverlay(Graphics2D graphics, BufferedImage part) {
-        graphics.drawImage(part, 0, 0, null);
-        graphics.dispose();
-    }
-
     /**
      * Draws a part of the head.
      *