From 1f4d3f4d8343feda5a64db1970e7a121ecac157c Mon Sep 17 00:00:00 2001
From: DaniTheSkunk <noreply@danitheskunk.com>
Date: Sun, 9 Oct 2022 03:36:12 +0000
Subject: [PATCH] started implementing virtual terminal

---
 .idea/codeStyles/Project.xml                  |   1 +
 Test.java                                     |  34 +++-
 .../skunkworks/backends/gl/RenderContext.java |   3 +-
 .../skunkworks/backends/gl/Window.java        |   1 +
 .../skunkworks/gfx/BaseRenderContext.java     |  38 +++++
 .../skunkworks/gfx/IRenderContext.java        |  15 +-
 .../skunkworks/gfx/vt/Terminal.java           | 161 ++++++++++++++++++
 7 files changed, 243 insertions(+), 10 deletions(-)
 create mode 100644 com/danitheskunk/skunkworks/gfx/vt/Terminal.java

diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index 497fcc2..7aac0a2 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -1,5 +1,6 @@
 <component name="ProjectCodeStyleConfiguration">
   <code_scheme name="Project" version="173">
+    <option name="ENABLE_SECOND_REFORMAT" value="true" />
     <codeStyleSettings language="JAVA">
       <option name="SPACE_BEFORE_IF_PARENTHESES" value="false" />
       <option name="SPACE_BEFORE_WHILE_PARENTHESES" value="false" />
diff --git a/Test.java b/Test.java
index 993609e..7faf09c 100644
--- a/Test.java
+++ b/Test.java
@@ -1,5 +1,8 @@
 import com.danitheskunk.skunkworks.*;
 import com.danitheskunk.skunkworks.gfx.Color;
+import com.danitheskunk.skunkworks.gfx.vt.Terminal;
+
+import java.nio.charset.StandardCharsets;
 
 public class Test {
 	public static void main(String[] args) {
@@ -26,38 +29,53 @@ public class Test {
 		var tex2 = window.loadTexture("C:\\art\\pixel stuff.png");
 		var tileset = window.loadTextureArray("C:\\stream\\coding\\rlc\\tilemap.png", new Vec2i(16, 16));
 		var font = window.loadFontTileset("EGA8x14.png");
-		var font2 = window.loadFontTTF("fonts\\LiberationSans-Regular.ttf", 16*8.f);
+		var fontThin = window.loadFontTileset("fonts\\thin-6x12.png");
+		var fontThin2 = window.loadFontTileset("fonts\\thin-12x12.png");
+		var font2 = window.loadFontTTF("fonts\\LiberationSans-Regular.ttf", 16 * 8.f);
 		var font3 = window.loadFontTTF("fonts\\LiberationSans-Regular.ttf", 16);
 		var tex = window.loadTexture(img);
 		var slice = window.loadNineSlice("demoassets\\9slice-2.png");
+		var term = new Terminal(new Vec2i(80, 45), fontThin2, fontThin);
 		//window.setDebug(true);
 
+		term.setChar(new Vec2i(0, 0), 0xC9, Color.GREEN);
+		term.setChar(new Vec2i(9, 9), 0xC9, Color.GREEN);
+		term.setChar(new Vec2i(10, 10), 0xC9, Color.GREEN);
+
 		while(!window.shouldClose()) {
 			window.tick();
 			var renderContext = window.renderStart();
-			renderContext.drawTextureRectangle(
+			/*renderContext.drawTextureRectangle(
 				new Recti(0, 0, 1280, 720),
 				tex,
 				false
-			);
+			);*/
 			//renderContext.drawTextureRectangle(
 			//	new Recti(new Vec2i(200, 100), tex2.getSize()),
 			//	tex2,
 			//	true
 			//);
 
-			renderContext.drawTextureRectangle(
+			/*renderContext.drawTextureRectangle(
 				new Recti(new Vec2i(400, 400), new Vec2i(160, 160)),
 				tileset.get(0x30),
 				true
-			);
+			);*/
 
-			renderContext.drawString(new Vec2i(710, 140), "hello world mew", font2);
+			//byte[] str = {(byte)0xC9, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xCD, (byte)0xBB};
+			//renderContext.drawString(new Vec2i(36, 36), new String(str), fontThin2, new Color(0, 255, 0));
+			//renderContext.drawString(new Vec2i(36, 36), "\u00c9\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00BB", fontThin2, new Color(0, 255, 0));
+			//renderContext.drawString(new Vec2i(36, 48), "\u00ba                                           \u00ba", fontThin2, new Color(0, 255, 0));
+			//renderContext.drawString(new Vec2i(36, 60), "\u00ba                                           \u00ba", fontThin2, new Color(0, 255, 0));
+			//renderContext.drawString(new Vec2i(36, 72), "\u00c8\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00cd\u00BC", fontThin2, new Color(0, 255, 0));
+			//renderContext.drawString(new Vec2i(48, 48), "The quick brown fox jumps over the lazy dog", fontThin, new Color(0, 255, 0));
+			//renderContext.drawString(new Vec2i(48, 60), "Soft Kitty, Warm Kitty, Little Ball of Fur. Happy Kitty, Sleepy Kitty, Purr Purr Purr.", fontThin, new Color(0, 255, 0));
 
+			renderContext.drawTerminal(term);
 
-			renderContext.drawNineSlice(slice, new Recti(100, 100, 75, 23));
+			//renderContext.drawNineSlice(slice, new Recti(100, 100, 75, 23));
 			//renderContext.drawString(new Vec2i(118, 117), "Meow", font3, new Color(0,0,0));
-			renderContext.drawString(new Vec2i(122, 105), "Meow", font, new Color(0,0,0));
+			//renderContext.drawString(new Vec2i(122, 105), "Meow", font, new Color(0,0,0));
 			window.renderFinish(renderContext);
 		}
 
diff --git a/com/danitheskunk/skunkworks/backends/gl/RenderContext.java b/com/danitheskunk/skunkworks/backends/gl/RenderContext.java
index e8fcc4b..4fab797 100644
--- a/com/danitheskunk/skunkworks/backends/gl/RenderContext.java
+++ b/com/danitheskunk/skunkworks/backends/gl/RenderContext.java
@@ -12,7 +12,8 @@ class RenderContext extends BaseRenderContext implements IRenderContext {
 	private final int texSizeIndex;
 	private final int tintIndex;
 
-	public RenderContext(TextureAtlas atlas, int texCoordIndex, int texOffsetIndex, int texSizeIndex, int tintIndex) {
+	public RenderContext(Vec2i size, TextureAtlas atlas, int texCoordIndex, int texOffsetIndex, int texSizeIndex, int tintIndex) {
+		super(size);
 		this.atlas = atlas;
 		this.texCoordIndex = texCoordIndex;
 		this.texOffsetIndex = texOffsetIndex;
diff --git a/com/danitheskunk/skunkworks/backends/gl/Window.java b/com/danitheskunk/skunkworks/backends/gl/Window.java
index 30ad9d4..6d93f41 100644
--- a/com/danitheskunk/skunkworks/backends/gl/Window.java
+++ b/com/danitheskunk/skunkworks/backends/gl/Window.java
@@ -53,6 +53,7 @@ public class Window extends BaseWindow {
 		program = new Program(vertexSource, fragmentSource);
 		program.use();
 		renderContext = new RenderContext(
+			size,
 			textureAtlas,
 			program.getAttribLocation("texCoord"),
 			program.getUniformLocation("texOffset"),
diff --git a/com/danitheskunk/skunkworks/gfx/BaseRenderContext.java b/com/danitheskunk/skunkworks/gfx/BaseRenderContext.java
index 8da7921..9d5842a 100644
--- a/com/danitheskunk/skunkworks/gfx/BaseRenderContext.java
+++ b/com/danitheskunk/skunkworks/gfx/BaseRenderContext.java
@@ -3,12 +3,19 @@ package com.danitheskunk.skunkworks.gfx;
 import com.danitheskunk.skunkworks.gfx.font.IFont;
 import com.danitheskunk.skunkworks.Recti;
 import com.danitheskunk.skunkworks.Vec2i;
+import com.danitheskunk.skunkworks.gfx.vt.Terminal;
 
 import java.io.UnsupportedEncodingException;
 import java.nio.ByteBuffer;
 import java.nio.IntBuffer;
 
 abstract public class BaseRenderContext implements IRenderContext {
+	protected Vec2i size;
+
+	protected BaseRenderContext(Vec2i size) {
+		this.size = size;
+	}
+
 	public void drawString(Vec2i pos, String string, IFont font) {
 		drawString(pos, string, font, Color.WHITE);
 	}
@@ -30,4 +37,35 @@ abstract public class BaseRenderContext implements IRenderContext {
 			x += font.getXAdvance(ch);
 		}
 	}
+
+	public void drawTerminal(Terminal terminal) {
+		var off = Vec2i.div(Vec2i.sub(size, terminal.getPixelSize()), 2);
+		drawTerminal(terminal, off);
+	}
+
+	public void drawTerminal(Terminal terminal, Vec2i pos) {
+		var termSize = terminal.getSize();
+		var charSize = terminal.getFullCharSize();
+		var halfCharSize = terminal.getHalfCharSize();
+		var halfFont = terminal.getHalfFont();
+		var fullFont = terminal.getFullFont();
+
+		for(int y = 0; y < termSize.getY(); ++y) {
+			for(int x = 0; x < termSize.getX(); ++x) {
+				var charPos = new Vec2i(x, y);
+				var bgColor = terminal.getBackgroundColor(charPos);
+				var fgColor = terminal.getForegroundColor(charPos);
+				var pixelPos = Vec2i.add(pos, Vec2i.mul(charPos, charSize));
+				var isHalfWidth = terminal.isHalfWidth(charPos);
+
+				drawTexture(pixelPos, fullFont.getTexture(0xdb), bgColor);
+				if(isHalfWidth) {
+					drawTexture(pixelPos, fullFont.getTexture(terminal.getLeftHalfChar(charPos)), fgColor);
+					drawTexture(Vec2i.add(pixelPos, halfCharSize), fullFont.getTexture(terminal.getRightHalfChar(charPos)), fgColor);
+				} else {
+					drawTexture(pixelPos, fullFont.getTexture(terminal.getChar(charPos)), fgColor);
+				}
+			}
+		}
+	}
 }
diff --git a/com/danitheskunk/skunkworks/gfx/IRenderContext.java b/com/danitheskunk/skunkworks/gfx/IRenderContext.java
index a5b30ee..3df2e0c 100644
--- a/com/danitheskunk/skunkworks/gfx/IRenderContext.java
+++ b/com/danitheskunk/skunkworks/gfx/IRenderContext.java
@@ -1,16 +1,29 @@
 package com.danitheskunk.skunkworks.gfx;
 
-import com.danitheskunk.skunkworks.*;
+import com.danitheskunk.skunkworks.Recti;
+import com.danitheskunk.skunkworks.Vec2i;
 import com.danitheskunk.skunkworks.gfx.font.IFont;
+import com.danitheskunk.skunkworks.gfx.vt.Terminal;
 
 public interface IRenderContext {
 	void drawNineSlice(NineSlice slice, Recti rect); //todo: add rounding mode
+
 	void drawRectangle(Recti rect, Color color);
+
 	void drawString(Vec2i pos, String string, IFont font);
+
 	void drawString(Vec2i pos, String string, IFont font, Color color);
+
 	void drawTexture(Vec2i pos, ITexture texture);
+
 	void drawTexture(Vec2i pos, ITexture texture, Color color);
+
 	void drawTextureRectangle(Recti rect, ITexture texture, boolean repeat);
+
 	void drawTextureRectangle(Recti rect, ITexture texture, Color color, boolean repeat);
+
+	void drawTerminal(Terminal terminal);
+
+	void drawTerminal(Terminal terminal, Vec2i pos);
 	//todo: drawTextureRectangleRepeat
 }
diff --git a/com/danitheskunk/skunkworks/gfx/vt/Terminal.java b/com/danitheskunk/skunkworks/gfx/vt/Terminal.java
new file mode 100644
index 0000000..970f410
--- /dev/null
+++ b/com/danitheskunk/skunkworks/gfx/vt/Terminal.java
@@ -0,0 +1,161 @@
+package com.danitheskunk.skunkworks.gfx.vt;
+
+import com.danitheskunk.skunkworks.Vec2i;
+import com.danitheskunk.skunkworks.gfx.Color;
+import com.danitheskunk.skunkworks.gfx.font.IFont;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Terminal {
+	private List<Cell> cells;
+	private Vec2i size;
+	private Vec2i fullCharSize;
+	private Vec2i halfCharSize;
+	private IFont fullFont;
+	private IFont halfFont;
+
+	public Terminal(Vec2i size, IFont fullFont, IFont halfFont) {
+		this.cells = new ArrayList<>();
+		this.size = size;
+		this.fullFont = fullFont;
+		this.halfFont = halfFont;
+
+		if(!fullFont.isMonospace() || !halfFont.isMonospace()) {
+			throw new RuntimeException("Fonts need to be monospace");
+		}
+
+		this.fullCharSize = fullFont.getMonospaceSize();
+		this.halfCharSize = halfFont.getMonospaceSize();
+
+		if(fullCharSize.getY() != halfCharSize.getY() || fullCharSize.getX() != halfCharSize.getX() * 2) {
+			throw new RuntimeException("halfFont needs to be half width of fullFont");
+		}
+
+		for(int i = 0; i < size.getY() * size.getX(); ++i) {
+			var cell = new Cell();
+			cell.fullChar = 0;
+			cell.secondChar = 0;
+			cell.halfWidth = false;
+			cell.bgColor = Color.BLACK;
+			cell.fgColor = Color.WHITE;
+			cells.add(cell);
+		}
+	}
+
+	public Vec2i getFullCharSize() {
+		return fullCharSize;
+	}
+
+	public Vec2i getHalfCharSize() {
+		return halfCharSize;
+	}
+
+	public Vec2i getSize() {
+		return size;
+	}
+
+	public void setChar(Vec2i pos, int ch) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fullChar = ch;
+		cell.halfWidth = false;
+	}
+
+	public void setChar(Vec2i pos, int ch, Color foregroundColor) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fullChar = ch;
+		cell.halfWidth = false;
+		cell.fgColor = foregroundColor;
+	}
+
+	public void setChar(Vec2i pos, int ch, Color foregroundColor, Color backgroundColor) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fullChar = ch;
+		cell.halfWidth = false;
+		cell.fgColor = foregroundColor;
+		cell.bgColor = backgroundColor;
+	}
+
+	public void setHalfChars(Vec2i pos, int chLeft, int chRight) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fullChar = chLeft;
+		cell.secondChar = chRight;
+		cell.halfWidth = true;
+	}
+
+	public void setHalfChars(Vec2i pos, int chLeft, int chRight, Color foregroundColor) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fullChar = chLeft;
+		cell.secondChar = chRight;
+		cell.halfWidth = true;
+		cell.fgColor = foregroundColor;
+	}
+
+	public void setHalfChars(Vec2i pos, int chLeft, int chRight, Color foregroundColor, Color backgroundColor) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fullChar = chLeft;
+		cell.secondChar = chRight;
+		cell.halfWidth = true;
+		cell.fgColor = foregroundColor;
+		cell.bgColor = backgroundColor;
+	}
+
+	public void setForegroundColor(Vec2i pos, Color color) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fgColor = color;
+	}
+
+	public void setBackgroundColor(Vec2i pos, Color color) {
+		var cell = cells.get(vecToPos(pos));
+		cell.fgColor = color;
+	}
+
+	public int getChar(Vec2i pos) {
+		return cells.get(vecToPos(pos)).fullChar;
+	}
+
+	public int getLeftHalfChar(Vec2i pos) {
+		return cells.get(vecToPos(pos)).fullChar;
+	}
+
+	public int getRightHalfChar(Vec2i pos) {
+		return cells.get(vecToPos(pos)).secondChar;
+	}
+
+	public Color getForegroundColor(Vec2i pos) {
+		return cells.get(vecToPos(pos)).fgColor;
+	}
+
+	public Color getBackgroundColor(Vec2i pos) {
+		return cells.get(vecToPos(pos)).bgColor;
+	}
+
+	public boolean isHalfWidth(Vec2i pos) {
+		return cells.get(vecToPos(pos)).halfWidth;
+	}
+
+	private int vecToPos(Vec2i pos) {
+		return pos.getX() + pos.getY() * size.getX();
+	}
+
+	public IFont getFullFont() {
+		return fullFont;
+	}
+
+	public IFont getHalfFont() {
+		return halfFont;
+	}
+
+	public Vec2i getPixelSize() {
+		return Vec2i.mul(size, fullCharSize);
+	}
+
+	private class Cell {
+		int fullChar;
+		int secondChar;
+		boolean halfWidth;
+		Color bgColor;
+		Color fgColor;
+	}
+
+}