10 files changed, 674 insertions, 0 deletions
diff --git a/src/renderer/runtime/view/entity.ts b/src/renderer/runtime/view/entity.ts
new file mode 100644
index 0000000..ec91503
--- /dev/null
+++ b/src/renderer/runtime/view/entity.ts
@@ -0,0 +1,72 @@
+import { EntityData } from '../model/data/entity';
+import { Renderer } from './renderer/renderer';
+import { SpriteCoords, SpriteView, SpriteViewBuilder } from './sprite';
+import { loadImage, mkTexture } from './util/image';
+
+import { getJSON } from '../util';
+
+import { vec2 } from 'gl-matrix';
+
+export class EntityView {
+	public static async load(r: Renderer, name: string): Promise<EntityView> {
+		const data = new EntityData(await getJSON(`resources/entity/${name}.json`));
+		const tile = await loadImage(`resources/sprite/entity/${data.sprite}.png`);
+
+		const [texture, size] = mkTexture(r, tile);
+		const frameSize = [size[0], size[1] / data.frames];
+
+		const offset = vec2.mul(vec2.create(), frameSize, data.anchor);
+		r.snapToGrid(offset, offset);
+
+		const coords: SpriteCoords = [
+			-offset[0],
+			-offset[1],
+			-offset[0] + frameSize[0],
+			-offset[1] + frameSize[1],
+		];
+
+		const sprites: SpriteView[] = [];
+
+		for (let frame = 0; frame < data.frames; frame++) {
+			const builder = new SpriteViewBuilder(r, texture);
+			builder.addSprite(coords, [0, frame / data.frames, 1, (frame + 1) / data.frames]);
+			sprites.push(builder.build());
+		}
+
+		return new EntityView(
+			data,
+			sprites,
+		);
+	}
+
+	private readonly totalTime: number;
+
+	private constructor(
+		public readonly data: EntityData,
+		public readonly sprites: SpriteView[],
+	) {
+		if (data.animation)
+			this.totalTime = data.animation.sequence.reduce((a, s) => a + s[0], 0);
+		else
+			this.totalTime = 0;
+	}
+
+	public getSpriteByTime(time: number): SpriteView {
+		time %= this.totalTime;
+
+		if (this.data.animation) {
+			for (const [len, sprite] of this.data.animation.sequence) {
+				time -= len;
+				if (time < 0)
+					return this.sprites[sprite];
+			}
+		}
+
+		return this.sprites[0];
+	}
+
+	public renderByTime(time: number) {
+		this.getSpriteByTime(time).render();
+	}
+
+}
diff --git a/src/renderer/runtime/view/input/gameinput.ts b/src/renderer/runtime/view/input/gameinput.ts
new file mode 100644
index 0000000..67fbe0c
--- /dev/null
+++ b/src/renderer/runtime/view/input/gameinput.ts
@@ -0,0 +1,78 @@
+import { InputHandler } from './inputhandler';
+
+import { Listenable } from '../../util';
+
+import { vec2 } from 'gl-matrix';
+
+export enum ButtonCode {
+	Action,
+	Back,
+	Menu,
+}
+
+const buttonMapping: Record<string, ButtonCode> = {
+	KeyZ: ButtonCode.Action,
+	KeyX: ButtonCode.Back,
+	KeyC: ButtonCode.Menu,
+};
+
+export interface DirectionInput {
+	type: 'direction';
+	direction: vec2;
+}
+
+export interface ButtonInput {
+	type: 'button';
+	button: ButtonCode;
+}
+
+export type GameInput = DirectionInput | ButtonInput;
+
+export class GameInputHandler extends Listenable<[GameInput]> {
+	private readonly input: InputHandler;
+
+	constructor() {
+		super();
+
+		this.input = new InputHandler(
+			new Set([
+				'ArrowLeft',
+				'ArrowUp',
+				'ArrowRight',
+				'ArrowDown',
+				...Object.keys(buttonMapping),
+			]));
+
+		this.input.addListener((key: string, pressed: boolean) => {
+			const button = buttonMapping[key];
+			if (button !== undefined) {
+				if (pressed)
+					this.runListeners({
+						type: 'button',
+						button,
+					});
+
+				return;
+			}
+
+			const dir = vec2.create();
+
+			if (this.input.has('ArrowLeft'))
+				vec2.add(dir, dir, [-1, 0]);
+			if (this.input.has('ArrowUp'))
+				vec2.add(dir, dir, [0, -1]);
+			if (this.input.has('ArrowRight'))
+				vec2.add(dir, dir, [1, 0]);
+			if (this.input.has('ArrowDown'))
+				vec2.add(dir, dir, [0, 1]);
+
+			if (vec2.sqrLen(dir) > 0)
+				vec2.normalize(dir, dir);
+
+			this.runListeners({
+				type: 'direction',
+				direction: dir,
+			});
+		});
+	}
+}
diff --git a/src/renderer/runtime/view/input/inputhandler.ts b/src/renderer/runtime/view/input/inputhandler.ts
new file mode 100644
index 0000000..17abfe6
--- /dev/null
+++ b/src/renderer/runtime/view/input/inputhandler.ts
@@ -0,0 +1,44 @@
+import { Listenable } from '../../util';
+
+export class InputHandler extends Listenable<[string, boolean]> {
+	private readonly keys: Set<string> = new Set();
+
+	constructor(relevantKeys: Set<string>) {
+		super();
+
+		window.addEventListener('keydown', (ev) => {
+			if (!relevantKeys.has(ev.code))
+				return;
+
+			ev.preventDefault();
+
+			if (ev.repeat)
+				return;
+
+			this.keys.add(ev.code);
+			this.runListeners(ev.code, true);
+		});
+
+		window.addEventListener('keyup', (ev) => {
+			if (!relevantKeys.has(ev.code))
+				return;
+
+			ev.preventDefault();
+
+			if (!this.keys.has(ev.code))
+				return;
+
+			this.keys.delete(ev.code);
+			this.runListeners(ev.code, false);
+		});
+
+		window.addEventListener('blur', () => {
+			this.keys.clear();
+			this.runListeners('', false);
+		});
+	}
+
+	public has(key: string): boolean {
+		return this.keys.has(key);
+	}
+}
diff --git a/src/renderer/runtime/view/map.ts b/src/renderer/runtime/view/map.ts
new file mode 100644
index 0000000..18def05
--- /dev/null
+++ b/src/renderer/runtime/view/map.ts
@@ -0,0 +1,173 @@
+import { EntityView } from './entity';
+import { Renderer } from './renderer/renderer';
+import { SpriteCoords, SpriteView, SpriteViewBuilder } from './sprite';
+import { loadImage, mkTexture } from './util/image';
+
+import { MapData } from '../model/data/map';
+
+import { nextPowerOf2 } from '../util';
+
+interface StaticMapTile {
+	type: 'static';
+	image: HTMLImageElement;
+}
+
+interface EntityTile {
+	type: 'entity';
+	entity: EntityView;
+}
+
+type MapTile = StaticMapTile | EntityTile;
+
+interface StaticTilesetTile {
+	type: 'static';
+	coords: SpriteCoords;
+}
+
+type TilesetTile = StaticTilesetTile | EntityTile;
+
+interface Tileset {
+	texture: WebGLTexture;
+	tiles: TilesetTile[];
+}
+
+async function loadTile(r: Renderer, tile: string): Promise<MapTile> {
+	const name = tile.substr(1);
+	switch (tile[0]) {
+	case '-':
+		return {
+			type: 'static',
+			image: await loadImage(`resources/sprite/tile/${name}.png`),
+		};
+
+	case '@':
+		return {
+			type: 'entity',
+			entity: await EntityView.load(r, name),
+		};
+
+	default:
+		throw new Error('invalid tile specifier');
+	}
+}
+
+function loadTiles(r: Renderer, tiles: string[]): Promise<MapTile[]> {
+	return Promise.all(tiles.map((tile) => loadTile(r, tile)));
+}
+
+function mkTileset(
+	r: Renderer,
+	mapTiles: MapTile[],
+): Tileset {
+	const tileSize = 32;
+
+	const canvasDim = nextPowerOf2(Math.sqrt(mapTiles.length));
+	const canvasSize = canvasDim * tileSize;
+
+	const canvas = document.createElement('canvas');
+	canvas.width = canvas.height = canvasSize;
+
+	let x = 0, y = 0;
+	const tiles: TilesetTile[] = [];
+	const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
+
+	for (const tile of mapTiles) {
+		switch (tile.type) {
+		case 'static':
+			ctx.drawImage(tile.image, x * tileSize, y * tileSize);
+			tiles.push({
+				type: 'static',
+				coords: [x / canvasDim, y / canvasDim, (x + 1) / canvasDim, (y + 1) / canvasDim],
+			});
+
+			x++;
+			if (x === canvasDim) {
+				x = 0;
+				y++;
+			}
+			break;
+
+		case 'entity':
+			tiles.push(tile);
+			break;
+		}
+	}
+
+	const [texture] = mkTexture(r, canvas);
+
+	return {
+		texture,
+		tiles,
+	};
+}
+
+function addSprite(
+	builder: SpriteViewBuilder,
+	entityTiles: Array<[[number, number], EntityView]>,
+	tileset: Tileset,
+	x: number,
+	y: number,
+	tile: number) {
+	if (!tile)
+		return;
+
+	const tilesetTile = tileset.tiles[tile - 1];
+
+	switch (tilesetTile.type) {
+		case 'static':
+			builder.addSprite([x, y, x + 1, y + 1], tilesetTile.coords);
+			break;
+
+		case 'entity':
+			entityTiles.push([[x + 0.5, y + 0.5], tilesetTile.entity]);
+			break;
+	}
+}
+
+function buildMapLayer(r: Renderer, tileset: Tileset, layer: number[][]): MapLayerView {
+	const builder = new SpriteViewBuilder(r, tileset.texture);
+	const entityTiles: Array<[[number, number], EntityView]> = [];
+
+	for (let x = 0; x < layer[0].length; x++)
+		for (let y = 0; y < layer.length; y++)
+			addSprite(builder, entityTiles, tileset, x, y, layer[y][x]);
+
+	return new MapLayerView(r, builder.build(), entityTiles);
+}
+
+class MapLayerView {
+	public constructor(
+		private r: Renderer,
+		private staticTiles: SpriteView,
+		private entityTiles: Array<[[number, number], EntityView]>,
+	) {
+	}
+
+	public render(time: number): void {
+		this.r.setTranslation([0, 0]);
+		this.staticTiles.render();
+
+		for (const [coords, entity] of this.entityTiles) {
+			this.r.setTranslation(coords);
+			entity.renderByTime(time);
+		}
+	}
+}
+
+export class MapView {
+	public static async load(r: Renderer, map: MapData): Promise<MapView> {
+		const tiles = await loadTiles(r, map.tiles);
+		const tileset = mkTileset(r, tiles);
+
+		const layers = map.layers.map((layer) => buildMapLayer(r, tileset, layer.tiles));
+		return new MapView(layers);
+	}
+
+	private constructor(private layers: MapLayerView[]) {
+	}
+
+	public render(time: number): void {
+		for (const layer of this.layers)
+			layer.render(time);
+	}
+}
diff --git a/src/renderer/runtime/view/renderer/renderer.ts b/src/renderer/runtime/view/renderer/renderer.ts
new file mode 100644
index 0000000..9f711d3
--- /dev/null
+++ b/src/renderer/runtime/view/renderer/renderer.ts
@@ -0,0 +1,100 @@
+import { nextPowerOf2 } from '../../util';
+import { Shaders } from './shaders';
+
+import { mat4, vec2 } from 'gl-matrix';
+
+export class Renderer {
+	public readonly coordScale = 32;
+	private readonly viewScale = 2;
+
+	private readonly gl: WebGLRenderingContext;
+	private readonly shaders: Shaders;
+
+	private readonly center: vec2 = vec2.create();
+	private readonly translation: vec2 = vec2.create();
+	private readonly viewport: mat4 = mat4.create();
+
+	constructor(private readonly canvas: HTMLCanvasElement) {
+		this.gl = this.mkContext();
+
+		this.shaders = new Shaders(this.gl);
+
+		this.gl.clearColor(0.0, 0.0, 0.0, 1.0);
+
+		this.gl.enable(this.gl.BLEND);
+		this.gl.blendFunc(this.gl.ONE, this.gl.ONE_MINUS_SRC_ALPHA);
+		this.gl.pixelStorei(this.gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
+	}
+
+	public createBuffer(): WebGLBuffer {
+		const ret = this.gl.createBuffer();
+		if (!ret)
+			throw new Error('unable to create buffer');
+
+		return ret;
+	}
+
+	public getContext(): WebGLRenderingContext {
+		return this.gl;
+	}
+
+	public getVertexPosLoc(): number {
+		return this.shaders.vertexPosLoc;
+	}
+
+	public getTextureCoordLoc(): number {
+		return this.shaders.textureCoordLoc;
+	}
+
+	public getSamplerLoc(): WebGLUniformLocation {
+		return this.shaders.samplerLoc;
+	}
+
+	public setCenter(v: vec2|number[]) {
+		this.snapToGrid(this.center, v);
+	}
+
+	public setTranslation(v: vec2|number[]) {
+		vec2.sub(this.translation, v, this.center);
+		this.snapToGrid(this.translation, this.translation);
+		this.gl.uniform2fv(this.shaders.translateLoc, this.translation);
+	}
+
+	public clear(): void {
+		this.gl.clear(this.gl.COLOR_BUFFER_BIT);
+
+		this.setTranslation([0, 0]);
+	}
+
+	public snapToGrid(out: vec2, a: vec2|number[]): void {
+		vec2.scale(out, a, this.coordScale);
+		vec2.round(out, out);
+		vec2.scale(out, out, 1 / this.coordScale);
+	}
+
+	public resize(): void {
+		const w = this.canvas.width;
+		const h = this.canvas.height;
+		const ws = nextPowerOf2(w);
+		const hs = nextPowerOf2(h);
+
+		this.gl.viewport((w - ws) / 2, (h - hs) / 2, ws, hs);
+		this.clear();
+
+		const scale = this.viewScale * this.coordScale;
+
+		mat4.identity(this.viewport);
+		mat4.scale(this.viewport, this.viewport, [2 * scale / ws, -2 * scale / hs, 1.0]);
+		this.gl.uniformMatrix4fv(this.shaders.viewportLoc, false, this.viewport);
+	}
+
+	private mkContext(): WebGLRenderingContext {
+		const gl = (
+			this.canvas.getContext('webgl') || this.canvas.getContext('experimental-webgl')
+		);
+		if (!gl)
+			throw new Error('unable to initialize WebGL context');
+
+		return gl;
+	}
+}
diff --git a/src/renderer/runtime/view/renderer/shaders.ts b/src/renderer/runtime/view/renderer/shaders.ts
new file mode 100644
index 0000000..8fd1fda
--- /dev/null
+++ b/src/renderer/runtime/view/renderer/shaders.ts
@@ -0,0 +1,79 @@
+import fragmentShaderSrc from './shaders/default.fs';
+import vertexShaderSrc from './shaders/default.vs';
+
+export class Shaders {
+	public readonly viewportLoc: WebGLUniformLocation;
+	public readonly translateLoc: WebGLUniformLocation;
+
+	public readonly vertexPosLoc: number;
+	public readonly textureCoordLoc: number;
+	public readonly samplerLoc: WebGLUniformLocation;
+
+	constructor(private readonly gl: WebGLRenderingContext) {
+		const shaderProgram = this.gl.createProgram();
+		if (!shaderProgram)
+			throw new Error('Unable to create shader program');
+
+		const vertexShader = this.compileShader(this.gl.VERTEX_SHADER, vertexShaderSrc);
+		const fragmentShader = this.compileShader(this.gl.FRAGMENT_SHADER, fragmentShaderSrc);
+
+		this.gl.attachShader(shaderProgram, vertexShader);
+		this.gl.attachShader(shaderProgram, fragmentShader);
+
+		this.gl.linkProgram(shaderProgram);
+		if (!this.gl.getProgramParameter(shaderProgram, this.gl.LINK_STATUS)) {
+			const err = this.gl.getProgramInfoLog(shaderProgram);
+
+			this.gl.deleteShader(vertexShader);
+			this.gl.deleteShader(fragmentShader);
+			this.gl.deleteProgram(shaderProgram);
+
+			throw new Error('Unable to link shader: ' + err);
+		}
+
+		this.gl.useProgram(shaderProgram);
+
+		this.vertexPosLoc = this.getAttribLocation(shaderProgram, 'aVertexPos');
+		this.gl.enableVertexAttribArray(this.vertexPosLoc);
+
+		this.textureCoordLoc = this.getAttribLocation(shaderProgram, 'aTextureCoord');
+		this.gl.enableVertexAttribArray(this.textureCoordLoc);
+
+		this.viewportLoc = this.getUniformLocation(shaderProgram, 'uViewport');
+		this.translateLoc = this.getUniformLocation(shaderProgram, 'uTranslate');
+		this.samplerLoc = this.getUniformLocation(shaderProgram, 'uSampler');
+	}
+
+	private compileShader(type: number, src: string): WebGLShader {
+		const shader = this.gl.createShader(type);
+		if (!shader)
+			throw new Error('Unable to create shader');
+
+		this.gl.shaderSource(shader, src);
+		this.gl.compileShader(shader);
+
+		if (!this.gl.getShaderParameter(shader, this.gl.COMPILE_STATUS)) {
+			const err = this.gl.getShaderInfoLog(shader);
+			this.gl.deleteShader(shader);
+			throw new Error('Unable to compile shader: ' + err);
+		}
+
+		return shader;
+	}
+
+	private getAttribLocation(program: WebGLProgram, name: string): number {
+		const ret = this.gl.getAttribLocation(program, name);
+		if (ret < 0)
+			throw new Error("unable to get location of attribute '" + name + "'");
+
+		return ret;
+	}
+
+	private getUniformLocation(program: WebGLProgram, name: string): WebGLUniformLocation {
+		const ret = this.gl.getUniformLocation(program, name);
+		if (!ret)
+			throw new Error("unable to get location of uniform '" + name + "'");
+
+		return ret;
+	}
+}
diff --git a/src/renderer/runtime/view/renderer/shaders/default.fs b/src/renderer/runtime/view/renderer/shaders/default.fs
new file mode 100644
index 0000000..2c8ad15
--- /dev/null
+++ b/src/renderer/runtime/view/renderer/shaders/default.fs
@@ -0,0 +1,10 @@
+precision highp float;
+
+varying vec2 vTextureCoord;
+
+uniform sampler2D uSampler;
+
+
+void main(void) {
+	gl_FragColor = texture2D(uSampler, vTextureCoord);
+}
diff --git a/src/renderer/runtime/view/renderer/shaders/default.vs b/src/renderer/runtime/view/renderer/shaders/default.vs
new file mode 100644
index 0000000..4715a17
--- /dev/null
+++ b/src/renderer/runtime/view/renderer/shaders/default.vs
@@ -0,0 +1,13 @@
+attribute vec2 aVertexPos;
+attribute vec2 aTextureCoord;
+
+uniform mat4 uViewport;
+uniform vec2 uTranslate;
+
+varying highp vec2 vTextureCoord;
+
+
+void main(void) {
+	gl_Position = uViewport * vec4(aVertexPos + uTranslate, 0.0, 1.0);
+	vTextureCoord = aTextureCoord;
+}
diff --git a/src/renderer/runtime/view/sprite.ts b/src/renderer/runtime/view/sprite.ts
new file mode 100644
index 0000000..3a5ebcb
--- /dev/null
+++ b/src/renderer/runtime/view/sprite.ts
@@ -0,0 +1,72 @@
+import { Renderer } from './renderer/renderer';
+
+export type SpriteCoords = [number, number, number, number];
+
+export class SpriteViewBuilder {
+	private static pushSprite(buf: number[], coords: SpriteCoords): void {
+		const [x1, y1, x2, y2] = coords;
+
+		buf.push(x1); buf.push(y1);
+		buf.push(x2); buf.push(y1);
+		buf.push(x1); buf.push(y2);
+
+		buf.push(x1); buf.push(y2);
+		buf.push(x2); buf.push(y1);
+		buf.push(x2); buf.push(y2);
+	}
+
+	private readonly vertexData: number[] = [];
+	private readonly textureData: number[] = [];
+
+	constructor(private readonly r: Renderer, private readonly texture: WebGLTexture) {}
+
+	public addSprite(vertexCoords: SpriteCoords, texCoords: SpriteCoords): void {
+		SpriteViewBuilder.pushSprite(this.vertexData, vertexCoords);
+		SpriteViewBuilder.pushSprite(this.textureData, texCoords);
+	}
+
+	public build(): SpriteView {
+		return new SpriteView(this.r, this.texture, this.vertexData, this.textureData);
+	}
+}
+
+export class SpriteView {
+	private readonly vertexCount: number;
+	private readonly vertexBuffer: WebGLBuffer;
+	private readonly textureBuffer: WebGLBuffer;
+
+	constructor(
+		private readonly r: Renderer,
+		private readonly texture: WebGLTexture,
+		vertexData: number[],
+		textureData: number[],
+	) {
+		const gl = r.getContext();
+
+		this.vertexBuffer = r.createBuffer();
+		gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
+		gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertexData), gl.STATIC_DRAW);
+
+		this.textureBuffer = r.createBuffer();
+		gl.bindBuffer(gl.ARRAY_BUFFER, this.textureBuffer);
+		gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(textureData), gl.STATIC_DRAW);
+
+		this.vertexCount = vertexData.length / 2;
+	}
+
+	public render(): void {
+		const gl = this.r.getContext();
+
+		gl.activeTexture(gl.TEXTURE0);
+		gl.bindTexture(gl.TEXTURE_2D, this.texture);
+		gl.uniform1i(this.r.getSamplerLoc(), 0);
+
+		gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
+		gl.vertexAttribPointer(this.r.getVertexPosLoc(), 2, gl.FLOAT, false, 0, 0);
+
+		gl.bindBuffer(gl.ARRAY_BUFFER, this.textureBuffer);
+		gl.vertexAttribPointer(this.r.getTextureCoordLoc(), 2, gl.FLOAT, false, 0, 0);
+
+		gl.drawArrays(gl.TRIANGLES, 0, this.vertexCount);
+	}
+}
diff --git a/src/renderer/runtime/view/util/image.ts b/src/renderer/runtime/view/util/image.ts
new file mode 100644
index 0000000..37c5e7f
--- /dev/null
+++ b/src/renderer/runtime/view/util/image.ts
@@ -0,0 +1,33 @@
+import { Renderer } from '../renderer/renderer';
+
+export function loadImage(url: string): Promise<HTMLImageElement> {
+	return new Promise((resolve, reject) => {
+		const img = new Image();
+		img.addEventListener('load', () => { resolve(img); });
+		img.addEventListener('error', () => { reject(new Error('failed to load ' + url)); });
+		img.src = url;
+	});
+}
+
+export function mkTexture(
+	r: Renderer,
+	src: HTMLCanvasElement|HTMLImageElement,
+): [WebGLTexture, [number, number]] {
+	const gl = r.getContext();
+	const texture = gl.createTexture();
+	if (!texture)
+		throw new Error('unable to create texture');
+
+	gl.bindTexture(gl.TEXTURE_2D, texture);
+	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, src);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+
+	const size: [number, number] = [
+		src.width / r.coordScale, src.height / r.coordScale,
+	];
+
+	return [texture, size];
+}