Fix native memory leak

in GC language.

src/main/kotlin/ru/dbotthepony/kstarbound/Main.kt

@@ -69,7 +69,7 @@ fun main() {
 		for (chunkX in 0 .. 100) {
 		//for (chunkX in 0 .. 17) {
 		//	for (chunkY in 21 .. 21) {
-			for (chunkY in 18 .. 24) {
+			for (chunkY in 0 .. 24) {
 				val data = db.read(byteArrayOf(1, (chunkX shr 8).toByte(), chunkX.toByte(), (chunkY shr 8).toByte(), chunkY.toByte()))
 				val data2 = db.read(byteArrayOf(2, (chunkX shr 8).toByte(), chunkX.toByte(), (chunkY shr 8).toByte(), chunkY.toByte()))
 

src/main/kotlin/ru/dbotthepony/kstarbound/defs/image/Image.kt

@@ -16,6 +16,11 @@ import it.unimi.dsi.fastutil.objects.Object2ObjectArrayMap
 import it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap
 import org.apache.logging.log4j.LogManager
 import org.lwjgl.opengl.GL45
+import org.lwjgl.stb.STBIEOFCallback
+import org.lwjgl.stb.STBIIOCallbacks
+import org.lwjgl.stb.STBIReadCallback
+import org.lwjgl.stb.STBIReadCallbackI
+import org.lwjgl.stb.STBISkipCallback
 import org.lwjgl.stb.STBImage
 import org.lwjgl.system.MemoryUtil
 import ru.dbotthepony.kstarbound.world.PIXELS_IN_STARBOUND_UNIT
@@ -25,7 +30,6 @@ import ru.dbotthepony.kstarbound.api.IStarboundFile
 import ru.dbotthepony.kstarbound.client.StarboundClient
 import ru.dbotthepony.kstarbound.client.gl.GLTexture2D
 import ru.dbotthepony.kstarbound.io.json.consumeNull
-import ru.dbotthepony.kstarbound.io.stream2STBIO
 import ru.dbotthepony.kstarbound.util.contains
 import ru.dbotthepony.kstarbound.util.get
 import ru.dbotthepony.kstarbound.util.getObject
@@ -341,12 +345,42 @@ class Image private constructor(
 					val getHeight = intArrayOf(0)
 					val components = intArrayOf(0)
 
+					val stream = BufferedInputStream(file.open())
+					val callback = STBIIOCallbacks.malloc()
+
+					val readCallback = STBIReadCallback.create(STBIReadCallbackI { _, buf, size ->
+						val readBuf = ByteArray(size)
+						val read = stream.read(readBuf)
+
+						for (i in 0 until read) {
+							MemoryUtil.memPutByte(buf + i, readBuf[i])
+						}
+
+						return@STBIReadCallbackI read
+					})
+
+					val skipCallback = STBISkipCallback.create { _, n -> stream.skip(n.toLong()) }
+
+					val eofCallback = STBIEOFCallback.create {
+						stream.mark(1)
+						val empty = stream.read() == -1
+						stream.reset()
+						if (empty) 1 else 0
+					}
+
+					callback.set(readCallback, skipCallback, eofCallback)
+
 					val status = STBImage.stbi_info_from_callbacks(
-						stream2STBIO(BufferedInputStream(file.open())), 0L,
+						callback, 0L,
 						getWidth, getHeight,
 						components
 					)
 
+					readCallback.free()
+					skipCallback.free()
+					eofCallback.free()
+					callback.free()
+
 					if (!status)
 						throw IllegalArgumentException("File $file is not an image or it is corrupted")
 

src/main/kotlin/ru/dbotthepony/kstarbound/io/Stream2STBIO.kt

@@ -1,38 +0,0 @@
-package ru.dbotthepony.kstarbound.io
-
-import org.lwjgl.stb.STBIEOFCallback
-import org.lwjgl.stb.STBIIOCallbacks
-import org.lwjgl.stb.STBIReadCallback
-import org.lwjgl.stb.STBIReadCallbackI
-import org.lwjgl.stb.STBISkipCallback
-import org.lwjgl.system.MemoryUtil
-import java.io.InputStream
-
-fun stream2STBIO(stream: InputStream): STBIIOCallbacks {
-	require(stream.markSupported()) { "Provided stream must support mark" }
-
-	val callback = STBIIOCallbacks.create()
-
-	val read = STBIReadCallback.create(STBIReadCallbackI { _, buf, size ->
-		val readBuf = ByteArray(size)
-		val read = stream.read(readBuf)
-
-		for (i in 0 until read) {
-			MemoryUtil.memPutByte(buf + i, readBuf[i])
-		}
-
-		return@STBIReadCallbackI read
-	})
-
-	val skip = STBISkipCallback.create { _, n -> stream.skip(n.toLong()) }
-
-	val eof = STBIEOFCallback.create {
-		stream.mark(1)
-		val empty = stream.read() == -1
-		stream.reset()
-		if (empty) 1 else 0
-	}
-
-	callback.set(read, skip, eof)
-	return callback
-}