code for new itemsheet format

src/net/torvald/terrarum/ItemSheet.kt

@@ -0,0 +1,49 @@
+package net.torvald.terrarum
+
+import com.badlogic.gdx.files.FileHandle
+import com.badlogic.gdx.graphics.Pixmap
+import com.badlogic.gdx.graphics.g2d.TextureRegion
+import com.badlogic.gdx.utils.Disposable
+import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
+
+/**
+ * Created by minjaesong on 2023-06-06.
+ */
+class ItemSheet(ref: FileHandle, tileW: Int = 48, tileH: Int = 48) : Disposable {
+
+    private val textureRegionPack = TextureRegionPack(ref, tileW, tileH + 1)
+
+    init {
+        val pixmap = Pixmap(ref)
+        for (y in 0 until textureRegionPack.verticalCount) {
+            for (x in 0 until textureRegionPack.horizontalCount) {
+                var w = 0
+                var h = 0
+                for (i in 0..7) {
+                    // width
+                    w = w or (pixmap.getPixel(x * tileW + i, y * (tileH + 1)).and(255) > 127).toInt(7 - i)
+                    // height
+                    h = h or (pixmap.getPixel(x * tileW + i + 8, y * (tileH + 1)).and(255) > 127).toInt(7 - i)
+                }
+
+                textureRegionPack.get(x, y).apply {
+                    this.setRegion(x * tileW, y * (tileH + 1) + 1, w, h)
+                }
+
+//                println("[ItemSheet] ${ref.path()} ($x,$y) dim ($w,$h)")
+            }
+        }
+        pixmap.dispose()
+    }
+
+    val horizontalCount = textureRegionPack.horizontalCount
+    val verticalCount = textureRegionPack.verticalCount
+
+    fun get(x: Int, y: Int) = textureRegionPack.get(x, y)
+
+    fun forEach(action: (TextureRegion) -> Unit) = textureRegionPack.regions.forEach(action)
+
+    override fun dispose() {
+        textureRegionPack.dispose()
+    }
+}