Reorganize
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dylan
256
io/window.ts
Normal file
256
io/window.ts
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import {
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createWindow,
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getProcAddress,
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gl,
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} from "../deps.ts";
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export {mainloop} from "../deps.ts";
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import { COLOR, palette } from "../data/colors.ts";
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export const gameWindow = createWindow({
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title: "Faux",
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width: 512,
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height: 512,
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resizable: true,
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glVersion: [3, 2],
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gles: true,
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});
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gl.load(getProcAddress);
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function loadShader(type: number, src: string) {
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const shader = gl.CreateShader(type);
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gl.ShaderSource(
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shader,
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1,
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new Uint8Array(
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new BigUint64Array([
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BigInt(
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Deno.UnsafePointer.value(
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Deno.UnsafePointer.of(new TextEncoder().encode(src)),
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),
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),
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]).buffer,
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),
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new Int32Array([src.length]),
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);
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gl.CompileShader(shader);
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const status = new Int32Array(1);
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gl.GetShaderiv(shader, gl.COMPILE_STATUS, status);
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if (status[0] === gl.FALSE) {
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const logLength = new Int32Array(1);
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gl.GetShaderiv(shader, gl.INFO_LOG_LENGTH, logLength);
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const log = new Uint8Array(logLength[0]);
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gl.GetShaderInfoLog(shader, logLength[0], logLength, log);
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console.log(new TextDecoder().decode(log));
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gl.DeleteShader(shader);
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return 0;
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}
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return shader;
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}
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const vShaderSrc = `
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attribute vec4 vPosition;
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attribute vec4 vCol;
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varying vec4 color;
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void main() {
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gl_Position = vPosition;
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color = vCol;
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}
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`;
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const fShaderSrc = `
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precision mediump float;
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varying vec4 color;
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void main() {
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gl_FragColor = color;
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}
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`;
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const vShader = loadShader(gl.VERTEX_SHADER, vShaderSrc);
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const fShader = loadShader(gl.FRAGMENT_SHADER, fShaderSrc);
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const program = gl.CreateProgram();
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gl.AttachShader(program, vShader);
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gl.AttachShader(program, fShader);
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gl.BindAttribLocation(program, 0, new TextEncoder().encode("vPosition\0"));
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gl.BindAttribLocation(program, 1, new TextEncoder().encode("vCol\0"));
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gl.LinkProgram(program);
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const status = new Int32Array(1);
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gl.GetProgramiv(program, gl.LINK_STATUS, status);
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if (status[0] === gl.FALSE) {
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const logLength = new Int32Array(1);
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gl.GetProgramiv(program, gl.INFO_LOG_LENGTH, logLength);
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const log = new Uint8Array(logLength[0]);
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gl.GetProgramInfoLog(program, logLength[0], logLength, log);
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console.log(new TextDecoder().decode(log));
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gl.DeleteProgram(program);
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Deno.exit(1);
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}
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gl.ClearColor(0.0, 0.0, 0.0, 1.0);
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const pixelsPerRow = 128;
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const top = 1;
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const left = -1;
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const cell = 2/pixelsPerRow;
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const getHalfAsInt = (n: number) => Number(parseInt(Math.floor(n/2).toString()));
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addEventListener("resize", (event) => {
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const {width, height} = event;
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const min = Math.min(width, height);
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gl.Viewport(getHalfAsInt(width-min), getHalfAsInt(height-min), min, min);
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});
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const px = (x: number, y: number) => {
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// deno-fmt-ignore
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return [
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left + x*cell, top - y*cell, 0,
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left + (x+1)*cell, top - y*cell, 0,
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left + x*cell, top - (y+1)*cell, 0,
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left + (x+1)*cell, top - y*cell, 0,
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left + x*cell, top - (y+1)*cell, 0,
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left + (x+1)*cell, top - (y+1)*cell, 0,
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];
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}
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const paletteX6 = palette.map(rgba => [...rgba, ...rgba, ...rgba, ...rgba, ...rgba, ...rgba]);
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const c = (n: number) => {
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return paletteX6[n];
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}
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const allPixelTriangles = new Float32Array(
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Array(pixelsPerRow*pixelsPerRow).fill(null).flatMap((_, i) => px(i%pixelsPerRow,Math.floor(i/pixelsPerRow)))
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)
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const allPixelColors = new Float32Array(
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Array(pixelsPerRow*pixelsPerRow).fill(null).flatMap(() => c(1))
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)
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export const cameraPos = {
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x: 0,
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y: 0,
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}
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export const setPixelColorRaw = (x: number, y: number, color: number) => {
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if (x < 0 || y < 0 || x > 127 || y > 127) {
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return;
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}
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if (color !== 0) {
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const col = c(color);
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allPixelColors.set(col, 4*6*(128*y+x));
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}
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}
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export const setPixelColor = (x: number, y: number, color: number) => {
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return setPixelColorRaw(Math.floor(x - cameraPos.x), Math.floor(y - cameraPos.y), color);
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}
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export const setPixelsInRect = (x: number, y: number, w: number, pixels: Array<number>) => {
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for (let i = 0; i < pixels.length; i++) {
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setPixelColor(x+i%w, y+Math.floor(i/w), pixels[i]);
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}
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}
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export const setPixelsInRectRaw = (x: number, y: number, w: number, pixels: Array<number>) => {
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for (let i = 0; i < pixels.length; i++) {
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setPixelColorRaw(x+i%w, y+Math.floor(i/w), pixels[i]);
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}
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}
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export const fillRect = (x: number, y: number, w: number, h: number, color: number) => {
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setPixelsInRect(x, y, w, Array(w*h).fill(color));
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}
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export const fillCircle = (x: number, y: number, r: number, color: number) => {
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const left = Math.floor(x-r-1);
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const top = Math.floor(y-r-1);
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for (let i = left; i <= Math.ceil(x+r+1); i ++) {
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for (let j = top; j <= Math.ceil(y+r+1); j ++) {
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if (Math.sqrt((x-i)**2 + (y-j)**2) <= r+0.5) {
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setPixelColor(i, j, color);
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}
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}
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}
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}
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export const outlineCircle = (x: number, y: number, r: number, color: number) => {
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const left = Math.floor(x-r-1);
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const top = Math.floor(y-r-1);
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const inR = (d: number) => d <= r+0.5 && d > r-0.5;
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for (let i = left; i <= Math.ceil(x+r+1); i ++) {
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for (let j = top; j <= Math.ceil(y+r+1); j ++) {
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const d = Math.sqrt((x-i)**2 + (y-j)**2);
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if (inR(d)) {
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const dh = Math.sqrt((x-(i+Math.sign(i-x)))**2 + (y-j)**2);
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const dv = Math.sqrt((x-i)**2 + (y-(j+Math.sign(j-y)))**2);
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const h = Math.abs(x-i) > Math.abs(y-j);
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if (!inR(h ? dh : dv)) {
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setPixelColor(i, j, color);
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}
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}
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}
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}
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}
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export const fillEllipse = (x0: number, y0: number, x1: number, y1: number, color: number) => {
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const x = 0.5*(x0 + x1);
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const y = 0.5*(y0 + y1);
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const rx = Math.abs(x0-x1)/2;
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const ry = Math.abs(y0-y1)/2;
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const left = Math.floor(x-rx-1);
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const top = Math.floor(y-ry-1);
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for (let i = left; i <= Math.ceil(x+rx+1); i ++) {
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for (let j = top; j <= Math.ceil(y+ry+1); j ++) {
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if (Math.sqrt(((x-i)/rx)**2 + ((y-j)/ry)**2) <= 1+(1/(rx+ry))) {
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setPixelColor(i, j, color);
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}
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}
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}
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}
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export const outlineEllipse = (x0: number, y0: number, x1: number, y1: number, color: number) => {
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const x = 0.5*(x0 + x1);
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const y = 0.5*(y0 + y1);
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const rx = Math.abs(x0-x1)/2;
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const ry = Math.abs(y0-y1)/2;
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const left = Math.floor(x-rx-1);
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const top = Math.floor(y-ry-1);
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const inR = (d: number) => d <= 1+1/(rx+ry);
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for (let i = left; i <= Math.ceil(x+rx+1); i ++) {
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for (let j = top; j <= Math.ceil(y+ry+1); j ++) {
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const d = Math.sqrt(((x-i)/rx)**2 + ((y-j)/ry)**2);
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if (inR(d)) {
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const dh = Math.sqrt(((x-(i+Math.sign(i-x)))/rx)**2 + ((y-j)/ry)**2);
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const dv = Math.sqrt(((x-i)/rx)**2 + ((y-(j+Math.sign(j-y)))/ry)**2);
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if (!inR(dh) || !inR(dv)) {
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setPixelColor(i, j, color);
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}
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}
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}
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}
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}
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export const fillRectRaw = (x: number, y: number, w: number, h: number, color: number) => {
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setPixelsInRectRaw(x, y, w, Array(w*h).fill(color));
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}
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export const clearScreen = (color?: number) => {
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fillRectRaw(0, 0, 128, 128, color ?? COLOR.BLACK);
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}
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export const frame = () => {
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gl.Clear(gl.COLOR_BUFFER_BIT);
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gl.UseProgram(program);
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gl.VertexAttribPointer(0, 3, gl.FLOAT, gl.FALSE, 0, allPixelTriangles);
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gl.VertexAttribPointer(1, 4, gl.FLOAT, gl.FALSE, 0, allPixelColors);
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gl.EnableVertexAttribArray(0);
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gl.EnableVertexAttribArray(1);
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gl.DrawArrays(gl.TRIANGLES, 0, 6*pixelsPerRow*pixelsPerRow);
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gameWindow.swapBuffers();
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}
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