From 2895f4be6d17a064c9e991c3a5ad39f5da63086e Mon Sep 17 00:00:00 2001
From: Song Minjae <alswo9628@gmail.com>
Date: Wed, 19 Apr 2017 20:53:03 +0900
Subject: [PATCH] Proper tga.gz loading using own imagedata

---
 .../torvald/slick/opengl/TGAGzImageData.java  | 328 ++++++++++++++++++
 .../torvald/terrarum/mapdrawer/TilesDrawer.kt |  32 +-
 .../slick/opengl/ImageDataFactory.java        |  87 +++++
 3 files changed, 416 insertions(+), 31 deletions(-)
 create mode 100644 src/net/torvald/slick/opengl/TGAGzImageData.java
 create mode 100644 src/org/newdawn/slick/opengl/ImageDataFactory.java

diff --git a/src/net/torvald/slick/opengl/TGAGzImageData.java b/src/net/torvald/slick/opengl/TGAGzImageData.java
new file mode 100644
index 000000000..0065cacf8
--- /dev/null
+++ b/src/net/torvald/slick/opengl/TGAGzImageData.java
@@ -0,0 +1,328 @@
+package net.torvald.slick.opengl;
+
+/*
+ * A utility to load .tga.gz
+ *
+ * Created by SKYHi14 on 2017-04-19.
+ */
+
+
+import java.io.BufferedInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.zip.GZIPInputStream;
+
+import org.lwjgl.BufferUtils;
+import org.newdawn.slick.opengl.LoadableImageData;
+
+/**
+ * A utility to load TGAs. Note: NOT THREAD SAFE
+ *
+ * Fresh cut of code but largely influeneced by the TGA loading class
+ * provided as part of the Java Monkey Engine (JME). Why not check out
+ * what they're doing over at http://www.jmonkeyengine.com. kudos to
+ * Mark Powell.
+ *
+ * @author Kevin Glass
+ */
+public class TGAGzImageData implements LoadableImageData {
+    /** The width of the texture that needs to be generated */
+    private int texWidth;
+    /** The height of the texture that needs to be generated */
+    private int texHeight;
+    /** The width of the TGA image */
+    private int width;
+    /** The height of the TGA image */
+    private int height;
+    /** The bit depth of the image */
+    private short pixelDepth;
+
+    /**
+     * Create a new TGA Loader
+     */
+    public TGAGzImageData() {
+    }
+
+    /**
+     * Flip the endian-ness of the short
+     *
+     * @param signedShort The short to flip
+     * @return The flipped short
+     */
+    private short flipEndian(short signedShort) {
+        int input = signedShort & 0xFFFF;
+        return (short) (input << 8 | (input & 0xFF00) >>> 8);
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.ImageData#getDepth()
+     */
+    public int getDepth() {
+        return pixelDepth;
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.ImageData#getWidth()
+     */
+    public int getWidth() {
+        return width;
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.ImageData#getHeight()
+     */
+    public int getHeight() {
+        return height;
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.ImageData#getTexWidth()
+     */
+    public int getTexWidth() {
+        return texWidth;
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.ImageData#getTexHeight()
+     */
+    public int getTexHeight() {
+        return texHeight;
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.LoadableImageData#loadImage(java.io.InputStream)
+     */
+    public ByteBuffer loadImage(InputStream fis) throws IOException {
+        return loadImage(fis,true, null);
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.LoadableImageData#loadImage(java.io.InputStream, boolean, int[])
+     */
+    public ByteBuffer loadImage(InputStream fis, boolean flipped, int[] transparent) throws IOException {
+        return loadImage(fis, flipped, false, transparent);
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.LoadableImageData#loadImage(java.io.InputStream, boolean, boolean, int[])
+     */
+    public ByteBuffer loadImage(InputStream fis, boolean flipped, boolean forceAlpha, int[] transparent) throws IOException {
+        if (transparent != null) {
+            forceAlpha = true;
+        }
+        byte red = 0;
+        byte green = 0;
+        byte blue = 0;
+        byte alpha = 0;
+
+        BufferedInputStream bis = new BufferedInputStream(new GZIPInputStream(fis, 8192), 16384);
+        DataInputStream dis = new DataInputStream(bis);
+
+        // Read in the Header
+        short idLength = (short) dis.read();
+        short colorMapType = (short) dis.read();
+        short imageType = (short) dis.read();
+        short cMapStart = flipEndian(dis.readShort());
+        short cMapLength = flipEndian(dis.readShort());
+        short cMapDepth = (short) dis.read();
+        short xOffset = flipEndian(dis.readShort());
+        short yOffset = flipEndian(dis.readShort());
+
+        if (imageType != 2) {
+            throw new IOException("Slick only supports uncompressed RGB(A) TGA images");
+        }
+
+        width = flipEndian(dis.readShort());
+        height = flipEndian(dis.readShort());
+        pixelDepth = (short) dis.read();
+        if (pixelDepth == 32) {
+            forceAlpha = false;
+        }
+
+        texWidth = get2Fold(width);
+        texHeight = get2Fold(height);
+
+        short imageDescriptor = (short) dis.read();
+        if ((imageDescriptor & 0x0020) == 0) {
+            flipped = !flipped;
+        }
+
+        // Skip image ID
+        if (idLength > 0) {
+            bis.skip(idLength);
+        }
+
+        byte[] rawData = null;
+        if ((pixelDepth == 32) || (forceAlpha)) {
+            pixelDepth = 32;
+            rawData = new byte[texWidth * texHeight * 4];
+        } else if (pixelDepth == 24) {
+            rawData = new byte[texWidth * texHeight * 3];
+        } else {
+            throw new RuntimeException("Only 24 and 32 bit TGAs are supported");
+        }
+
+        if (pixelDepth == 24) {
+            if (flipped) {
+                for (int i = height-1; i >= 0; i--) {
+                    for (int j = 0; j < width; j++) {
+                        blue = dis.readByte();
+                        green = dis.readByte();
+                        red = dis.readByte();
+
+                        int ofs = ((j + (i * texWidth)) * 3);
+                        rawData[ofs] = red;
+                        rawData[ofs + 1] = green;
+                        rawData[ofs + 2] = blue;
+                    }
+                }
+            } else {
+                for (int i = 0; i < height; i++) {
+                    for (int j = 0; j < width; j++) {
+                        blue = dis.readByte();
+                        green = dis.readByte();
+                        red = dis.readByte();
+
+                        int ofs = ((j + (i * texWidth)) * 3);
+                        rawData[ofs] = red;
+                        rawData[ofs + 1] = green;
+                        rawData[ofs + 2] = blue;
+                    }
+                }
+            }
+        } else if (pixelDepth == 32) {
+            if (flipped) {
+                for (int i = height-1; i >= 0; i--) {
+                    for (int j = 0; j < width; j++) {
+                        blue = dis.readByte();
+                        green = dis.readByte();
+                        red = dis.readByte();
+                        if (forceAlpha) {
+                            alpha = (byte) 255;
+                        } else {
+                            alpha = dis.readByte();
+                        }
+
+                        int ofs = ((j + (i * texWidth)) * 4);
+
+                        rawData[ofs] = red;
+                        rawData[ofs + 1] = green;
+                        rawData[ofs + 2] = blue;
+                        rawData[ofs + 3] = alpha;
+
+                        if (alpha == 0) {
+                            rawData[ofs + 2] = (byte) 0;
+                            rawData[ofs + 1] = (byte) 0;
+                            rawData[ofs] = (byte) 0;
+                        }
+                    }
+                }
+            } else {
+                for (int i = 0; i < height; i++) {
+                    for (int j = 0; j < width; j++) {
+                        blue = dis.readByte();
+                        green = dis.readByte();
+                        red = dis.readByte();
+                        if (forceAlpha) {
+                            alpha = (byte) 255;
+                        } else {
+                            alpha = dis.readByte();
+                        }
+
+                        int ofs = ((j + (i * texWidth)) * 4);
+
+                        if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
+                            rawData[ofs] = red;
+                            rawData[ofs + 1] = green;
+                            rawData[ofs + 2] = blue;
+                            rawData[ofs + 3] = alpha;
+                        } else {
+                            rawData[ofs] = red;
+                            rawData[ofs + 1] = green;
+                            rawData[ofs + 2] = blue;
+                            rawData[ofs + 3] = alpha;
+                        }
+
+                        if (alpha == 0) {
+                            rawData[ofs + 2] = 0;
+                            rawData[ofs + 1] = 0;
+                            rawData[ofs] = 0;
+                        }
+                    }
+                }
+            }
+        }
+        fis.close();
+
+        if (transparent != null) {
+            for (int i=0;i<rawData.length;i+=4) {
+                boolean match = true;
+                for (int c=0;c<3;c++) {
+                    if (rawData[i+c] != transparent[c]) {
+                        match = false;
+                    }
+                }
+
+                if (match) {
+                    rawData[i+3] = 0;
+                }
+            }
+        }
+
+        // Get a pointer to the image memory
+        ByteBuffer scratch = BufferUtils.createByteBuffer(rawData.length);
+        scratch.put(rawData);
+
+        int perPixel = pixelDepth / 8;
+        if (height < texHeight-1) {
+            int topOffset = (texHeight-1) * (texWidth*perPixel);
+            int bottomOffset = (height-1) * (texWidth*perPixel);
+            for (int x=0;x<texWidth*perPixel;x++) {
+                scratch.put(topOffset+x, scratch.get(x));
+                scratch.put(bottomOffset+(texWidth*perPixel)+x, scratch.get((texWidth*perPixel)+x));
+            }
+        }
+        if (width < texWidth-1) {
+            for (int y=0;y<texHeight;y++) {
+                for (int i=0;i<perPixel;i++) {
+                    scratch.put(((y+1)*(texWidth*perPixel))-perPixel+i, scratch.get(y*(texWidth*perPixel)+i));
+                    scratch.put((y*(texWidth*perPixel))+(width*perPixel)+i, scratch.get((y*(texWidth*perPixel))+((width-1)*perPixel)+i));
+                }
+            }
+        }
+
+        scratch.flip();
+
+        return scratch;
+    }
+
+    /**
+     * Get the closest greater power of 2 to the fold number
+     *
+     * @param fold The target number
+     * @return The power of 2
+     */
+    private int get2Fold(int fold) {
+        int ret = 2;
+        while (ret < fold) {
+            ret *= 2;
+        }
+        return ret;
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.ImageData#getImageBufferData()
+     */
+    public ByteBuffer getImageBufferData() {
+        throw new RuntimeException("TGAImageData doesn't store it's image.");
+    }
+
+    /**
+     * @see org.newdawn.slick.opengl.LoadableImageData#configureEdging(boolean)
+     */
+    public void configureEdging(boolean edging) {
+    }
+}
diff --git a/src/net/torvald/terrarum/mapdrawer/TilesDrawer.kt b/src/net/torvald/terrarum/mapdrawer/TilesDrawer.kt
index cb6762226..387b266b4 100644
--- a/src/net/torvald/terrarum/mapdrawer/TilesDrawer.kt
+++ b/src/net/torvald/terrarum/mapdrawer/TilesDrawer.kt
@@ -33,40 +33,10 @@ object TilesDrawer {
     private val TILE_SIZE = FeaturesDrawer.TILE_SIZE
     private val TILE_SIZEF = FeaturesDrawer.TILE_SIZE.toFloat()
 
-    //val tilesTerrain = SpriteSheet(ModMgr.getPath("basegame", "tiles/terrain.tga"), TILE_SIZE, TILE_SIZE)
+    val tilesTerrain = SpriteSheet(ModMgr.getPath("basegame", "tiles/terrain.tga.gz"), TILE_SIZE, TILE_SIZE)
     // Slick has some weird quirks with PNG's transparency. I'm using 32-bit targa here.
     val tilesWire = SpriteSheet(ModMgr.getPath("basegame", "tiles/wire.tga"), TILE_SIZE, TILE_SIZE)
 
-    val tilesTerrain: SpriteSheet
-
-    init {
-        // read DEFLATEd terrain.tar
-        val tgaLoader = TGAImageData()
-        val terrainImageData = tgaLoader.loadImage(
-                GZIPInputStream(
-                        FileInputStream(ModMgr.getFile("basegame", "tiles/terrain.tga.gz")),
-                        8192
-                ), false, null)
-        terrainImageData.rewind()
-        /*val terrainTex = InternalTextureLoader.get().getTexture(object : ImageData {
-            override fun getHeight(): Int = tgaLoader.height
-            override fun getTexWidth(): Int = tgaLoader.texWidth
-            override fun getDepth(): Int = tgaLoader.depth
-            override fun getImageBufferData(): ByteBuffer = terrainImageData
-            override fun getWidth(): Int = tgaLoader.width
-            override fun getTexHeight(): Int = tgaLoader.texHeight
-        }, Image.FILTER_NEAREST)*/
-
-        //// method 1
-        //val terrainImage = Image(terrainTex)
-        //tilesTerrain = SpriteSheet(terrainImage, TILE_SIZE, TILE_SIZE)
-
-        //// method 2
-        val terrainImgBuffer = ImageBuffer(tgaLoader.width, tgaLoader.height)
-        terrainImageData.get(terrainImgBuffer.rgba)
-        tilesTerrain = SpriteSheet(terrainImgBuffer.image, TILE_SIZE, TILE_SIZE)
-    }
-
 
     val breakAnimSteps = 10
 
diff --git a/src/org/newdawn/slick/opengl/ImageDataFactory.java b/src/org/newdawn/slick/opengl/ImageDataFactory.java
new file mode 100644
index 000000000..fc5a0dc3c
--- /dev/null
+++ b/src/org/newdawn/slick/opengl/ImageDataFactory.java
@@ -0,0 +1,87 @@
+package org.newdawn.slick.opengl;
+
+/**
+ * Modifications: Added support for .tga.gz
+ *
+ * Created by SKYHi14 on 2017-04-19.
+ */
+
+import net.torvald.slick.opengl.TGAGzImageData;
+import org.newdawn.slick.util.Log;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/**
+ * A static utility to create the appropriate image data for a particular reference.
+ *
+ * @author kevin
+ */
+public class ImageDataFactory {
+    /** True if we're going to use the native PNG loader - cached so it doesn't have
+     *  the security check repeatedly
+     */
+    private static boolean usePngLoader = true;
+    /** True if the PNG loader property has been checked */
+    private static boolean pngLoaderPropertyChecked = false;
+
+    /** The name of the PNG loader configuration property */
+    private static final String PNG_LOADER = "org.newdawn.slick.pngloader";
+
+    /**
+     * Check PNG loader property. If set the native PNG loader will
+     * not be used.
+     */
+    private static void checkProperty() {
+        if (!pngLoaderPropertyChecked) {
+            pngLoaderPropertyChecked = true;
+
+            try {
+                AccessController.doPrivileged(new PrivilegedAction() {
+                    public Object run() {
+                        String val = System.getProperty(PNG_LOADER);
+                        if ("false".equalsIgnoreCase(val)) {
+                            usePngLoader = false;
+                        }
+
+                        Log.info("Use Java PNG Loader = " + usePngLoader);
+                        return null;
+                    }
+                });
+            } catch (Throwable e) {
+                // ignore, security failure - probably an applet
+            }
+        }
+    }
+
+    /**
+     * Create an image data that is appropriate for the reference supplied
+     *
+     * @param ref The reference to the image to retrieve
+     * @return The image data that can be used to retrieve the data for that resource
+     */
+    public static LoadableImageData getImageDataFor(String ref) {
+        LoadableImageData imageData;
+        checkProperty();
+
+        ref = ref.toLowerCase();
+
+        if (ref.endsWith(".tga")) {
+            return new TGAImageData();
+        }
+        if (ref.endsWith(".tga.gz")) {
+            return new TGAGzImageData();
+        }
+        if (ref.endsWith(".png")) {
+            CompositeImageData data = new CompositeImageData();
+            if (usePngLoader) {
+                data.add(new PNGImageData());
+            }
+            data.add(new ImageIOImageData());
+
+            return data;
+        }
+
+        return new ImageIOImageData();
+    }
+}