Palette swap / Blocks changed and renamed

packer/build.gradle

@@ -3,10 +3,47 @@ apply plugin: "java"
 sourceCompatibility = 1.8
 sourceSets.main.java.srcDirs = [ "src/" ]
 
+
+import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.tools.texturepacker.TexturePacker
 
+import javax.imageio.ImageIO
+
 def textureFolder = "../core/assets-raw/sprites/generated/"
 
+task swapColors(){
+    doLast{
+        if (project.hasProperty("colors")) {
+            def carr = new File(getProperty("colors")).text.split("\n");
+            def map = [:]
+            def swaps = 0
+            carr.each {str -> map[Color.argb8888(Color.valueOf(str.split("=")[0]))] = Color.argb8888(Color.valueOf(str.split("=")[1]))}
+            def tmpc = new Color()
+
+            fileTree(dir: '../core/assets-raw/sprites', include: "**/*.png").visit { file ->
+                if(file.isDirectory()) return;
+                swaps ++
+
+                def img = ImageIO.read(file.file)
+                for (x in (0..img.getWidth()-1)) {
+                    for (y in (0..img.getHeight()-1)) {
+                        def c = img.getRGB(x, y)
+                        Color.argb8888ToColor(tmpc, c)
+                        if(tmpc.a < 0.1f) continue;
+                        if(map.containsKey(c)){
+                            img.setRGB(x, y, (int)map.get(c))
+                        }
+                    }
+                }
+                ImageIO.write(img, "png", file.file)
+            }
+            println "Swapped $swaps images."
+        }else{
+            throw new InvalidUserDataException("No replacement colors specified. Use -Pcolors=\"<path to color file>\"");
+        }
+    }
+}
+
 task pack(){
     dependsOn 'prePack'