From 7fcce0da98bad896df3b89abaa379063843f8eaa Mon Sep 17 00:00:00 2001
From: Paula <paulaboks@protonmail.com>
Date: Sat, 7 Mar 2026 18:40:33 -0300
Subject: [PATCH] Fix font rendering

---
 assets/fonts/m6x11.fnt                   | 100 +++++++++
 assets/fonts/m6x11.png                   | Bin 0 -> 1887 bytes
 build.ts                                 |  48 +++-
 client/assets.ts                         |   2 +-
 client/index.html                        |  12 -
 client/main.ts                           |   7 +-
 client/renderer.ts                       | 267 +++++++++++++----------
 client/systems/rendering/render_utils.ts |  19 +-
 8 files changed, 307 insertions(+), 148 deletions(-)
 create mode 100644 assets/fonts/m6x11.fnt
 create mode 100644 assets/fonts/m6x11.png

diff --git a/assets/fonts/m6x11.fnt b/assets/fonts/m6x11.fnt
new file mode 100644
index 0000000..7babc6b
--- /dev/null
+++ b/assets/fonts/m6x11.fnt
@@ -0,0 +1,100 @@
+info face="m6x11 Medium" size=16 bold=0 italic=0 charset="unic" unicode=1 padding=4,4,4,4 spacing=0,0 
+common lineHeight=15.4375 base=11 ascent=11 descent=-3 scaleW=256 scaleH=128 pages=1 packed=0
+page id=0 file="Unknown.png"
+chars count=95
+char id=32 x=20 y=95 width=9 height=9 xoffset=0 yoffset=11 xadvance=5 page=1 chnl=15
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+kernings count=0
diff --git a/assets/fonts/m6x11.png b/assets/fonts/m6x11.png
new file mode 100644
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diff --git a/build.ts b/build.ts
index 1b80b04..9ddfeb7 100644
--- a/build.ts
+++ b/build.ts
@@ -8,8 +8,38 @@ function clear_folder() {
 	Deno.mkdir(BUILD_FOLDER);
 }
 
-function build_fonts() {
-	copy(`assets/fonts`, `${BUILD_FOLDER}/assets/fonts`);
+async function build_fonts() {
+	// i used https://fonts.varg.dev/ to build the font, its confusing
+	const canvas_size = 256;
+
+	const font = await loadImage("assets/fonts/m6x11.png");
+	const canvas = createCanvas(canvas_size, canvas_size);
+	const ctx = canvas.getContext("2d");
+
+	ctx.drawImage(font, 0, 0);
+	const image_data = ctx.getImageData(0, 0, canvas_size, canvas_size);
+	const data = image_data.data;
+	for (let i = 0; i < data.length; i += 4) {
+		const r = data[i];
+		const g = data[i + 1];
+		const b = data[i + 2];
+
+		if (r === 0 && g === 0 && b === 0) {
+			// black pixel, alpha = 0
+			data[i + 3] = 0;
+		} else {
+			// force white white
+			data[i] = 255;
+			data[i + 1] = 255;
+			data[i + 2] = 255;
+			data[i + 3] = 255;
+		}
+	}
+	ctx.putImageData(image_data, 0, 0);
+
+	Deno.mkdir(`${BUILD_FOLDER}/assets/fonts`);
+	Deno.writeFileSync(`${BUILD_FOLDER}/assets/fonts/m6x11.png`, canvas.toBuffer());
+	copy("assets/fonts/m6x11.fnt", `${BUILD_FOLDER}/assets/fonts/m6x11.fnt`);
 }
 
 function next_power_of_two(value: number): number {
@@ -96,11 +126,15 @@ async function build_client() {
 }
 
 async function build() {
-	const now = performance.now();
-	clear_folder();
-	await build_assets();
-	await build_client();
-	console.log(`Built in ${(performance.now() - now).toFixed(2)}ms`);
+	try {
+		const now = performance.now();
+		clear_folder();
+		await build_assets();
+		await build_client();
+		console.log(`Built in ${(performance.now() - now).toFixed(2)}ms`);
+	} catch (e) {
+		console.log(e);
+	}
 }
 
 let last_build = 0;
diff --git a/client/assets.ts b/client/assets.ts
index b3dd998..38097ee 100644
--- a/client/assets.ts
+++ b/client/assets.ts
@@ -45,7 +45,7 @@ export class AssetManager {
 			audio.load();
 			this.assets[key] = audio;
 			this.loading_promises.push(promise);
-		} else if (src.endsWith(".txt") || src.endsWith(".md")) {
+		} else if (src.endsWith(".txt") || src.endsWith(".md") || src.endsWith(".fnt")) {
 			const promise = async () => {
 				const resp = await fetch(src);
 				this.assets[key] = await resp.text();
diff --git a/client/index.html b/client/index.html
index d67a65b..2a1b1d3 100644
--- a/client/index.html
+++ b/client/index.html
@@ -5,24 +5,12 @@
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
 		<title>bworld</title>
 		<style>
-			/*
-			Font by Daniel Linssen (https://managore.itch.io)
-			https://managore.itch.io/m6x11
-			*/
-			@font-face {
-				font-family: "m6x11";
-				src: url("/assets/fonts/m6x11.ttf");
-				font-weight: normal;
-				font-style: normal;
-				font-smooth: never;
-			}
 			html, body {
 				width: 100vw;
 				height: 100vh;
 				margin: 0;
 				overflow: hidden;
 			}
-
 			canvas {
 				display: block;
 				image-rendering: pixelated;
diff --git a/client/main.ts b/client/main.ts
index badb75a..4eefda2 100644
--- a/client/main.ts
+++ b/client/main.ts
@@ -2,7 +2,7 @@ import { EverythingRegistry } from "../common/everything_registry.ts";
 import { AssetManager } from "./assets.ts";
 import { ClientWorld } from "./client_world.ts";
 import { InputManager } from "./input_manager.ts";
-import { begin_drawing, end_drawing, init_window } from "./renderer.ts";
+import { begin_drawing, end_drawing, init_font, init_window } from "./renderer.ts";
 
 EverythingRegistry.add_registry("tiles");
 await import("./tiles/mod.ts");
@@ -77,8 +77,13 @@ AssetManager.instance.load("bworld:player", "/assets/sprites/player.png");
 AssetManager.instance.load("bworld:roguelike", "/assets/sprites/roguelike.png");
 AssetManager.instance.load("bworld:ui", "/assets/sprites/ui.png");
 
+AssetManager.instance.load("bworld:m6x11", "/assets/fonts/m6x11.png");
+AssetManager.instance.load("bworld:m6x11_fnt", "/assets/fonts/m6x11.fnt");
+
 await AssetManager.instance.load_all();
 
+init_font();
+
 const client_world = new ClientWorld();
 
 const loop = new ClientLoop(client_world);
diff --git a/client/renderer.ts b/client/renderer.ts
index 56d4c0d..f2fbed2 100644
--- a/client/renderer.ts
+++ b/client/renderer.ts
@@ -1,8 +1,9 @@
+import { AssetManager } from "./assets.ts";
 import { Camera } from "./components/camera.ts";
 
 const MAX_SPRITES = 10000;
 const VERTS_PER_SPRITE = 6;
-const FLOATS_PER_VERT = 4;
+const FLOATS_PER_VERT = 8;
 
 let gl: WebGLRenderingContext;
 export let canvas: HTMLCanvasElement;
@@ -27,18 +28,15 @@ let _texture_loc: WebGLUniformLocation | null;
 
 let current_texture: WebGLTexture | null = null;
 
-const glyph_size = 32;
-let font_texture: WebGLTexture;
-const glyphs: Record<string, { u0: number; v0: number; u1: number; v1: number }> = {};
-
 const vertex_src = `
 attribute vec2 aPos;
 attribute vec2 aUV;
+attribute vec4 aColor;
 
 varying vec2 vUV;
+varying vec4 vColor;
 
 uniform vec2 uResolution;
-
 uniform vec2 uCameraPos;
 uniform float uCameraZoom;
 uniform float uCameraRot;
@@ -70,16 +68,19 @@ void main(){
   gl_Position = vec4(clip * vec2(1.0,-1.0),0.0,1.0);
 
   vUV = aUV;
+  vColor = aColor;
 }
 `;
 
 const fragment_src = `
 precision mediump float;
 varying vec2 vUV;
+varying vec4 vColor;
 uniform sampler2D uTex;
 
-void main(){
-  gl_FragColor = texture2D(uTex,vUV);
+void main() {
+    vec4 texColor = texture2D(uTex, vUV);
+    gl_FragColor = texColor * vColor;
 }
 `;
 
@@ -116,6 +117,10 @@ export function init_window(canvas_element: HTMLCanvasElement) {
 	gl.enableVertexAttribArray(uv_loc);
 	gl.vertexAttribPointer(uv_loc, 2, gl.FLOAT, false, stride, 8);
 
+	const color_loc = gl.getAttribLocation(program, "aColor");
+	gl.enableVertexAttribArray(color_loc);
+	gl.vertexAttribPointer(color_loc, 4, gl.FLOAT, false, FLOATS_PER_VERT * 4, 16);
+
 	resolution_loc = gl.getUniformLocation(program, "uResolution");
 	_texture_loc = gl.getUniformLocation(program, "uTex");
 
@@ -129,8 +134,6 @@ export function init_window(canvas_element: HTMLCanvasElement) {
 
 	gl.enable(gl.BLEND);
 	gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
-
-	init_font();
 }
 
 function create_shader(type: number, src: string): WebGLShader {
@@ -253,38 +256,6 @@ export function draw_texture_region(
 	push_quad(dx, dy, dw, dh, u0, v0, u1, v1);
 }
 
-export function draw_text(str: string, x: number, y: number) {
-	if (!font_texture) {
-		return;
-	}
-
-	if (current_texture !== font_texture) {
-		flush_batch();
-		current_texture = font_texture;
-	}
-
-	for (const ch of str) {
-		const g = glyphs[ch];
-		if (!g) {
-			x += glyph_size;
-			continue;
-		}
-
-		push_quad(
-			x,
-			y,
-			glyph_size,
-			glyph_size,
-			g.u0,
-			g.v0,
-			g.u1,
-			g.v1,
-		);
-
-		x += glyph_size * 0.6;
-	}
-}
-
 function flush_batch() {
 	if (vert_index === 0 || !current_texture) {
 		return;
@@ -295,12 +266,11 @@ function flush_batch() {
 
 	gl.useProgram(program);
 
-	//const posLoc = gl.getAttribLocation(program, "aPos");
-	//const uvLoc = gl.getAttribLocation(program, "aUV");
-	gl.enableVertexAttribArray(pos_loc);
-	gl.vertexAttribPointer(pos_loc, 2, gl.FLOAT, false, 16, 0);
-	gl.enableVertexAttribArray(uv_loc);
-	gl.vertexAttribPointer(uv_loc, 2, gl.FLOAT, false, 16, 8);
+	// const stride = FLOATS_PER_VERT * 4;
+	// gl.enableVertexAttribArray(pos_loc);
+	// gl.vertexAttribPointer(pos_loc, 2, gl.FLOAT, false, stride, 0);
+	// gl.enableVertexAttribArray(uv_loc);
+	// gl.vertexAttribPointer(uv_loc, 2, gl.FLOAT, false, stride, 8);
 
 	gl.uniform2f(camera_pos_loc, Math.floor(camera.x), Math.floor(camera.y));
 	gl.uniform1f(camera_zoom_loc, camera.zoom);
@@ -312,84 +282,39 @@ function flush_batch() {
 	vert_index = 0;
 }
 
-function push_quad(dx: number, dy: number, dw: number, dh: number, u0: number, v0: number, u1: number, v1: number) {
+function push_quad(
+	dx: number,
+	dy: number,
+	dw: number,
+	dh: number,
+	u0: number,
+	v0: number,
+	u1: number,
+	v1: number,
+	r = 1,
+	g = 1,
+	b = 1,
+	a = 1,
+) {
 	const x2 = dx + dw;
 	const y2 = dy + dh;
 
+	// deno-fmt-ignore
 	const v = [
-		dx,
-		dy,
-		u0,
-		v0,
-		x2,
-		dy,
-		u1,
-		v0,
-		dx,
-		y2,
-		u0,
-		v1,
+        dx, dy, u0, v0, r, g, b, a,
+        x2, dy, u1, v0, r, g, b, a,
+        dx, y2, u0, v1, r, g, b, a,
 
-		x2,
-		dy,
-		u1,
-		v0,
-		x2,
-		y2,
-		u1,
-		v1,
-		dx,
-		y2,
-		u0,
-		v1,
-	];
+        x2, dy, u1, v0, r, g, b, a,
+        x2, y2, u1, v1, r, g, b, a,
+        dx, y2, u0, v1, r, g, b, a,
+    ];
 
 	for (let i = 0; i < v.length; i += 1) {
 		vertex_data[vert_index++] = v[i];
 	}
 }
 
-function init_font() {
-	const c = document.createElement("canvas");
-	c.width = 512;
-	c.height = 512;
-
-	const ctx = c.getContext("2d")!;
-	ctx.fillStyle = "white";
-	ctx.font = glyph_size + "px m6x11";
-
-	let x = 0;
-	let y = glyph_size;
-
-	for (let i = 32; i < 127; i++) {
-		const ch = String.fromCharCode(i);
-
-		ctx.fillText(ch, x, y);
-
-		glyphs[ch] = {
-			u0: x / 512,
-			v0: (y - glyph_size) / 512,
-			u1: (x + glyph_size) / 512,
-			v1: y / 512,
-		};
-
-		x += glyph_size;
-
-		if (x > 512 - glyph_size) {
-			x = 0;
-			y += glyph_size;
-		}
-	}
-
-	font_texture = gl.createTexture()!;
-
-	gl.bindTexture(gl.TEXTURE_2D, font_texture);
-	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, c);
-
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
-	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
-}
-
 export function resize_canvas() {
 	const width = self.innerWidth;
 	const height = self.innerHeight;
@@ -415,3 +340,115 @@ export function end_mode_2d() {
 	flush_batch();
 	camera = default_camera;
 }
+
+// font stuff
+
+let font_texture: Texture;
+let font_fnt: FntFont;
+
+export function init_font() {
+	font_texture = AssetManager.instance.get<Texture>("bworld:m6x11");
+
+	font_fnt = parse_fnt(AssetManager.instance.get("bworld:m6x11_fnt"));
+}
+
+interface FntChar {
+	id: number;
+	x: number;
+	y: number;
+	width: number;
+	height: number;
+	xoffset: number;
+	yoffset: number;
+	xadvance: number;
+	page: number;
+}
+
+interface FntFont {
+	line_height: number;
+	chars: Record<number, FntChar>;
+	pages: string[];
+}
+
+function parse_fnt(text: string): FntFont {
+	const lines = text.split(/\r?\n/);
+
+	const font: FntFont = {
+		line_height: 0,
+		chars: {},
+		pages: [],
+	};
+
+	for (const line of lines) {
+		const parts = line.split(" ");
+		const type = parts[0];
+
+		const data: Record<string, string> = {};
+
+		for (const part of parts.slice(1)) {
+			const [k, v] = part.split("=");
+			if (!k) {
+				continue;
+			}
+			data[k] = v?.replace(/"/g, "");
+		}
+
+		if (type === "common") {
+			font.line_height = Number(data.lineHeight);
+		}
+
+		if (type === "page") {
+			font.pages.push(data.file);
+		}
+
+		if (type === "char") {
+			const char: FntChar = {
+				id: Number(data.id),
+				x: Number(data.x),
+				y: Number(data.y),
+				width: Number(data.width),
+				height: Number(data.height),
+				xoffset: Number(data.xoffset),
+				yoffset: Number(data.yoffset),
+				xadvance: Number(data.xadvance),
+				page: Number(data.page),
+			};
+
+			font.chars[char.id] = char;
+		}
+	}
+
+	return font;
+}
+
+export function draw_text(str: string, x: number, y: number, scale: number = 1, color = [1, 1, 1, 1]) {
+	if (!font_texture) {
+		return;
+	}
+
+	if (current_texture !== font_texture.tex) {
+		flush_batch();
+		current_texture = font_texture.tex;
+	}
+
+	for (const ch of str) {
+		const glyph = font_fnt.chars[ch.charCodeAt(0)];
+		if (!glyph) {
+			continue;
+		}
+
+		const dx = x + glyph.xoffset * scale;
+		const dy = y + glyph.yoffset * scale;
+		const dw = glyph.width * scale;
+		const dh = glyph.height * scale;
+
+		const u0 = glyph.x / font_texture.width;
+		const v0 = glyph.y / font_texture.height;
+		const u1 = (glyph.x + glyph.width) / font_texture.width;
+		const v1 = (glyph.y + glyph.height) / font_texture.height;
+
+		push_quad(dx, dy, dw, dh, u0, v0, u1, v1, color[0], color[1], color[2], color[3]);
+
+		x += glyph.xadvance * scale;
+	}
+}
diff --git a/client/systems/rendering/render_utils.ts b/client/systems/rendering/render_utils.ts
index 47ea457..6eb94fa 100644
--- a/client/systems/rendering/render_utils.ts
+++ b/client/systems/rendering/render_utils.ts
@@ -119,21 +119,16 @@ export function draw_item(item: ItemStack, x: number, y: number) {
 	if (item.max_amount !== 1) {
 		draw_text(
 			String(item.amount),
-			x + SLOT_SIZE + 2 - 4,
-			y + SLOT_SIZE + 2 - 4,
-			//2,
-			//"#3f3f3f",
-			//"bottom",
-			//"right",
+			x + SLOT_SIZE + 2 - 11 * 2,
+			y + SLOT_SIZE + 2 - 11 * 2,
+			1,
+			[63 / 255, 63 / 255, 63 / 255],
 		);
 		draw_text(
 			String(item.amount),
-			x + SLOT_SIZE - 4,
-			y + SLOT_SIZE - 4,
-			//2,
-			//"white",
-			//"bottom",
-			//"right",
+			x + SLOT_SIZE - 11 * 2,
+			y + SLOT_SIZE - 11 * 2,
+			1,
 		);
 	}
 }