sprite tool exports "formatted" TGA

meaning if alpha is zero, RGB is also zero

build.gradle

@@ -48,14 +48,20 @@ jar {
 task game(type: JavaExec) {
     classpath sourceSets.main.runtimeClasspath
     main = 'net.torvald.terrarum.AppLoader'
+    group = "Application"
+    description = "Launches the game. Should be the same as 'gradlew run'."
 }
 
 task spriteassembler(type: JavaExec) {
     classpath sourceSets.main.runtimeClasspath
     main = 'net.torvald.spriteassembler.SpriteAssemblerAppKt'
+    group = "Application"
+    description = "Launches the Sprite Assembler."
 }
 
 task csveditor(type: JavaExec) {
     classpath sourceSets.main.runtimeClasspath
     main = 'net.torvald.terrarum.debuggerapp.CSVEditor'
+    group = "Application"
+    description = "Launches the CSV Editor. (for Blocks?)"
 }

src/com/badlogic/gdx/graphics/PixmapIO2.java

@@ -0,0 +1,89 @@
+package com.badlogic.gdx.graphics;
+
+import com.badlogic.gdx.files.FileHandle;
+import com.badlogic.gdx.utils.StreamUtils;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * Created by minjaesong on 2019-01-07.
+ */
+public class PixmapIO2 {
+
+    public static void writeTGA(FileHandle file, Pixmap pixmap) throws IOException {
+        OutputStream output = file.write(false);
+
+        try {
+            _writeTGA(output, pixmap);
+        } finally {
+            StreamUtils.closeQuietly(output);
+        }
+    }
+
+    private static void _writeTGA(OutputStream out, Pixmap pixmap) throws IOException {
+        byte[] width = toShortLittle(pixmap.getWidth());
+        byte[] height = toShortLittle(pixmap.getHeight());
+        byte[] zero = toShortLittle(0);
+
+        byte[] zeroalpha = new byte[]{0,0,0,0};
+
+        out.write(0); // ID field: empty
+        out.write(0); // no colour map, but should be ignored anyway as it being unmapped RGB
+        out.write(2); // 2 means unmapped RGB
+        out.write(new byte[]{0,0,0,0,0}); // color map spec: empty
+        out.write(zero); // x origin: 0
+        out.write(zero); // y origin: 0
+        out.write(width); // width
+        out.write(height); // height
+        out.write(32); // image pixel size: we're writing 32-bit image (8bpp BGRA)
+        out.write(8); // image descriptor: dunno, Photoshop writes 8 in there
+
+        // write actual image data
+        // since we're following Photoshop's conventional header, we also follows Photoshop's
+        // TGA saving scheme, that is:
+        //     1. BGRA order
+        //     2. Y-Flipped but not X-Flipped
+
+        for (int y = pixmap.getHeight() - 1; y >= 0; y--) {
+            for (int x = 0; x < pixmap.getWidth(); x++) {
+                int color = pixmap.getPixel(x, y);
+
+                // if alpha == 0, write special value instead
+                if ((color & 0xFF) == 0) {
+                    out.write(zeroalpha);
+                }
+                else {
+                    out.write(RGBAtoBGRA(color));
+                }
+            }
+        }
+
+
+        // write footer
+        // 00 00 00 00 00 00 00 00 TRUEVISION-XFILE 2E 00
+        out.write(new byte[]{0,0,0,0,0,0,0,0});
+        out.write("TerrarumHappyTGA".getBytes());
+        out.write(new byte[]{0x2E,0});
+
+
+        out.flush();
+        out.close();
+    }
+
+    private static byte[] toShortLittle(int i) {
+        return new byte[]{
+                (byte) (i & 0xFF),
+                (byte) ((i >>> 8) & 0xFF)
+        };
+    }
+
+    private static byte[] RGBAtoBGRA(int rgba) {
+        return new byte[]{
+                (byte) ((rgba >>> 8) & 0xFF),
+                (byte) ((rgba >>> 16) & 0xFF),
+                (byte) ((rgba >>> 24) & 0xFF),
+                (byte) (rgba & 0xFF)
+        };
+    }
+}

src/net/torvald/spriteassembler/SpriteAssemblerApp.kt

@@ -4,10 +4,7 @@ import com.badlogic.gdx.Game
 import com.badlogic.gdx.Gdx
 import com.badlogic.gdx.backends.lwjgl.LwjglApplication
 import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration
-import com.badlogic.gdx.graphics.Color
-import com.badlogic.gdx.graphics.GL20
-import com.badlogic.gdx.graphics.Pixmap
-import com.badlogic.gdx.graphics.Texture
+import com.badlogic.gdx.graphics.*
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import net.torvald.terrarum.inUse
 import java.awt.BorderLayout
@@ -76,8 +73,7 @@ class SpriteAssemblerApp(val gdxWindow: SpriteAssemblerPreview) : JFrame() {
                                "ADD_ROWS=Enter the number of rows to add:\n" +
                                "WRITE_FAIL=Writing to file has failed:\n" +
                                "STAT_INIT=Creating a new CSV. You can still open existing file.\n" +
-                               "STAT_SAVE_SUCCESSFUL=File saved successfully.\n" +
-                               "STAT_NEW_FILE=New CSV created.\n" +
+                               "STAT_SAVE_TGA_SUCCESSFUL=Spritesheet exported successfully.\n" +
                                "STAT_LOAD_SUCCESSFUL=File loaded successfully.\n" +
                                "ERROR_INTERNAL=Something went wrong.\n" +
                                "ERROR_PARSE_FAIL=Parsing failed\n" +
@@ -122,7 +118,6 @@ class SpriteAssemblerApp(val gdxWindow: SpriteAssemblerPreview) : JFrame() {
         panelMain.resizeWeight = 0.666
 
         val menu = JMenuBar()
-        menu.add(JMenu("File"))
         menu.add(JMenu("Parse")).addMouseListener(object : MouseAdapter() {
             override fun mousePressed(e: MouseEvent?) {
                 try {
@@ -193,6 +188,17 @@ class SpriteAssemblerApp(val gdxWindow: SpriteAssemblerPreview) : JFrame() {
                 }
             }
         })
+        menu.add(JMenu("Export")).addMouseListener(object : MouseAdapter() {
+            override fun mousePressed(e: MouseEvent?) {
+                val fileChooser = JFileChooser()
+                fileChooser.showSaveDialog(null)
+
+                if (fileChooser.selectedFile != null) {
+                    gdxWindow.requestExport(fileChooser.selectedFile.absolutePath)
+                    statBar.text = lang.getProperty("STAT_SAVE_TGA_SUCCESSFUL")
+                } // else, do nothing
+            }
+        })
 
         this.layout = BorderLayout()
         this.add(menu, BorderLayout.NORTH)
@@ -250,6 +256,9 @@ class SpriteAssemblerPreview: Game() {
     private var doAssemble = false
     private lateinit var assembleProp: ADProperties
 
+    private var doExport = false
+    private lateinit var exportPath: String
+
     override fun render() {
         if (doAssemble) {
             // assembly requires GL context
@@ -257,6 +266,11 @@ class SpriteAssemblerPreview: Game() {
             assembleImage(assembleProp)
         }
 
+        if (doExport && image != null) {
+            doExport = false
+            PixmapIO2.writeTGA(Gdx.files.absolute(exportPath), image)
+        }
+
 
         Gdx.gl.glClearColor(.62f,.79f,1f,1f)
         Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT)
@@ -280,6 +294,14 @@ class SpriteAssemblerPreview: Game() {
         assembleProp = prop
     }
 
+    fun requestExport(path: String) {
+        doExport = true
+        exportPath = path
+    }
+
+    override fun resize(width: Int, height: Int) {
+        super.resize(width, height)
+    }
 }
 
 fun main(args: Array<String>) {