From f93f35dae3c10c57a38fba3c10469ab5657dbe96 Mon Sep 17 00:00:00 2001
From: DaniTheSkunk <>
Date: Mon, 19 Dec 2022 00:53:33 +0000
Subject: [PATCH] started adding Image8

---
 com/danitheskunk/skunkworks/Engine.java     |  7 +-
 com/danitheskunk/skunkworks/gfx/Image8.java | 85 +++++++++++++++++++++
 2 files changed, 91 insertions(+), 1 deletion(-)
 create mode 100644 com/danitheskunk/skunkworks/gfx/Image8.java

diff --git a/com/danitheskunk/skunkworks/Engine.java b/com/danitheskunk/skunkworks/Engine.java
index b351099..e072094 100644
--- a/com/danitheskunk/skunkworks/Engine.java
+++ b/com/danitheskunk/skunkworks/Engine.java
@@ -3,6 +3,7 @@ package com.danitheskunk.skunkworks;
 import com.danitheskunk.skunkworks.backends.gl.Window;
 import com.danitheskunk.skunkworks.gfx.GraphicsBackend;
 import com.danitheskunk.skunkworks.gfx.Image32;
+import com.danitheskunk.skunkworks.gfx.Image8;
 import org.lwjgl.BufferUtils;
 
 import java.io.FileInputStream;
@@ -65,10 +66,14 @@ public class Engine {
 		return data;
 	}
 
-	public Image32 loadImage(String path) {
+	public Image32 loadImage32(String path) {
 		return new Image32(loadBytes(path));
 	}
 
+	public Image8 loadImage8(String path) {
+		return new Image8(loadBytes(path));
+	}
+
 	public IWindow openWindow(Vec2i size, String title) {
 		return switch(graphicsBackend) {
 			case OPENGL -> new Window(size, title, this);
diff --git a/com/danitheskunk/skunkworks/gfx/Image8.java b/com/danitheskunk/skunkworks/gfx/Image8.java
new file mode 100644
index 0000000..ce6be2b
--- /dev/null
+++ b/com/danitheskunk/skunkworks/gfx/Image8.java
@@ -0,0 +1,85 @@
+package com.danitheskunk.skunkworks.gfx;
+
+import com.danitheskunk.skunkworks.Recti;
+import com.danitheskunk.skunkworks.Vec2i;
+import org.lwjgl.stb.STBImage;
+
+import java.nio.ByteBuffer;
+
+public class Image8 {
+	private final byte[] data;
+	private final Vec2i size;
+
+	//constructors
+	public Image8(ByteBuffer buffer) { //png or similar
+		//todo: resource system
+		int[] x = {0}, y = {0}, n = {0};
+		var img = STBImage.stbi_load_from_memory(buffer, x, y, n, 1);
+		size = new Vec2i(x[0], y[0]);
+		data = new byte[x[0] * y[0]];
+		assert img != null;
+		img.get(data);
+	}
+
+	public Image8(Vec2i size) {
+		this.size = size;
+		data = new byte[size.getX() * size.getY()];
+	}
+
+	public Image8(ByteBuffer buffer, Vec2i size) {
+		data = new byte[buffer.remaining()];
+		buffer.get(data);
+		this.size = size;
+	}
+
+	public void drawImage(Image8 srcImage, Vec2i destPos) {
+		drawImage(srcImage, destPos, new Recti(Vec2i.ZERO,
+			srcImage.getSize()));
+	}
+
+	public void drawImage(Image8 srcImage, Vec2i destPos, Recti srcRect) {
+		//todo: check bounds
+		//todo: write in faster way than pixel stuff
+		for(int y = 0; y < srcRect.getHeight(); ++y) {
+			for(int x = 0; x < srcRect.getWidth(); ++x) {
+				var iterPos = new Vec2i(x, y);
+				var to = Vec2i.add(destPos, iterPos);
+				var from = Vec2i.add(srcRect.getPos(), iterPos);
+				setPixel(to, srcImage.getPixel(from));
+			}
+		}
+	}
+
+	//getters
+	public byte[] getData() {
+		return data;
+	}
+
+	public int getHeight() {
+		return size.getY();
+	}
+
+	public int getPixel(Vec2i pos) {
+		int i = pos.getX() + pos.getY() * size.getX();
+		return (int)data[i] & 0xFF; //todo: check if that works > 127
+	}
+
+	public Vec2i getSize() {
+		return size;
+	}
+
+	public Image8 getSubImage(Recti rect) {
+		Image8 img = new Image8(rect.getSize());
+		img.drawImage(this, Vec2i.ZERO, rect);
+		return img;
+	}
+
+	public int getWidth() {
+		return size.getX();
+	}
+
+	public void setPixel(Vec2i pos, int col) {
+		int i = pos.getX() + pos.getY() * size.getX();
+		data[i] = (byte) (col & 0xFF);
+	}
+}