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index.html
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<html>
<body>
<div>
<img id="myimage" src=""/>
</div>
<style type="text/css">
canvas, img {
image-rendering: optimizeSpeed; /* Older versions of FF */
image-rendering: -moz-crisp-edges; /* FF 6.0+ */
image-rendering: -webkit-optimize-contrast; /* Safari */
image-rendering: -o-crisp-edges; /* OS X & Windows Opera (12.02+) */
image-rendering: pixelated; /* Awesome future-browsers */
-ms-interpolation-mode: nearest-neighbor; /* IE */
}
</style>
<div>
<canvas id="mycanvas" width="1" height="1" style="border: 1px solid black;"/>
</div>
<script type="text/javascript">
function println(msg) {
console.log(msg);
}
/**
* @return {HTMLCanvasElement}
*/
function createCanvas(width, height) {
const canvas = document.createElement('canvas');
canvas.style.width = `${width}px`;
canvas.style.height = `${height}px`;
canvas.width = width;
canvas.height = height;
return canvas;
}
ImageData.prototype.toCanvas = function () {
const out = createCanvas(this.width, this.height);
const ctx = out.getContext('2d')
ctx.putImageData(this, 0, 0);
return out;
};
/**
* @return {HTMLCanvasElement}
*/
HTMLImageElement.prototype.toCanvas = function () {
const image = this;
const canvas = createCanvas(image.width, image.height);
const ctx = canvas.getContext('2d');
ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
return canvas;
};
HTMLImageElement.prototype.toBitmap32 = function () {
return this.toCanvas().toBitmap32();
};
/**
* @return {ImageData}
*/
HTMLCanvasElement.prototype.getImageData = function () {
return this.getContext('2d').getImageData(0, 0, this.width, this.height);
};
/**
* @return {Bitmap32}
*/
HTMLCanvasElement.prototype.toBitmap32 = function () {
const imageData = this.getImageData();
return new Bitmap32(imageData.width, imageData.height, new Uint8Array(imageData.data.buffer));
};
/**
* @return {HTMLCanvasElement}
*/
HTMLCanvasElement.prototype.putImageData = function (imageData) {
this.getContext('2d').putImageData(imageData, 0, 0);
return this;
};
/**
* @return {HTMLCanvasElement}
*/
HTMLCanvasElement.prototype.scale = function (sx, sy) {
const i = this.getImageData();
const o = new ImageData(i.width * sx, i.height * sy);
for (let y = 0; y < o.height; y++) {
for (let x = 0; x < o.width; x++) {
const ix = (x / sx) | 0;
const iy = (y / sy) | 0;
const opos = (x + y * o.width) * 4;
const ipos = (ix + iy * i.width) * 4;
// noinspection PointlessArithmeticExpressionJS
o.data[opos + 0] = i.data[ipos + 0];
o.data[opos + 1] = i.data[ipos + 1];
o.data[opos + 2] = i.data[ipos + 2];
o.data[opos + 3] = i.data[ipos + 3];
}
}
return createCanvas(o.width, o.height).putImageData(o);
};
async function readJson(path) {
return await (await fetch(path)).json();
}
async function readText(path) {
return await (await fetch(path)).text();
}
class GlProgram {
/**
* @param {WebGLRenderingContext}gl
* @param {string} vertexSource
* @param {string} fragmentSource
*/
constructor(gl, vertexSource, fragmentSource) {
this.gl = gl;
this.program = gl.createProgram();
this.fragment = this.createShader(gl.FRAGMENT_SHADER, fragmentSource);
this.vertex = this.createShader(gl.VERTEX_SHADER, vertexSource);
gl.linkProgram(this.program);
if (!gl.getProgramParameter(this.program, gl.LINK_STATUS) ) throw new Error(gl.getProgramInfoLog(this.program));
}
createShader(type, source) {
const gl = this.gl;
const shader = gl.createShader(type);
gl.attachShader(this.program, shader);
gl.shaderSource(shader, source);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) throw new Error(gl.getShaderInfoLog(shader));
return shader;
}
use() {
this.gl.useProgram(this.program);
}
dispose() {
this.gl.deleteShader(this.fragment);
this.gl.deleteShader(this.vertex);
this.gl.deleteProgram(this.program);
}
}
class GlBuffer {
/**
* @param {WebGLRenderingContext}gl
* @param {int} type
*/
constructor(gl, type = gl.ARRAY_BUFFER) {
this.gl = gl;
this.type = type;
this.buffer = gl.createBuffer();
}
use() {
this.gl.bindBuffer(this.type, this.buffer);
return this;
}
/**
* @return {GlBuffer}
*/
uploadFloats(data) {
this.use();
this.gl.bufferData(this.type, new Float32Array(data), this.gl.STATIC_DRAW);
return this;
}
/**
* @return {GlBuffer}
*/
uploadShorts(data) {
this.use();
this.gl.bufferData(this.type, new Uint16Array(data), this.gl.STATIC_DRAW);
return this;
}
dispose() {
this.gl.deleteBuffer(this.buffer);
}
}
class GlTexture2d {
/**
* @param {WebGLRenderingContext}gl
*/
constructor(gl) {
this.gl = gl;
this.width = 0;
this.height = 0;
this.tex = gl.createTexture();
}
setRgbaData(width, height, data) {
const gl = this.gl;
this.width = width;
this.height = height;
this.data = data;
gl.activeTexture(gl.TEXTURE7);
gl.bindTexture(gl.TEXTURE_2D, this.tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);
return this;
}
setFloat4Data(width, height, data) {
const gl = this.gl;
this.width = width;
this.height = height;
this.data = data;
gl.activeTexture(gl.TEXTURE7);
gl.bindTexture(gl.TEXTURE_2D, this.tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.FLOAT, data);
gl.bindTexture(gl.TEXTURE_2D, null);
return this;
}
setFloatData(data, width = data.length % 2048, height = Math.ceil(data.length / 2048)) {
const gl = this.gl;
this.width = width;
this.height = height;
this.data = data;
gl.activeTexture(gl.TEXTURE7);
gl.bindTexture(gl.TEXTURE_2D, this.tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.LUMINANCE, width, height, 0, gl.LUMINANCE, gl.FLOAT, data);
return this;
}
setEmptyFloat4(width, height) {
this.width = width;
this.height = height;
this.data = null;
gl.activeTexture(gl.TEXTURE7);
gl.bindTexture(gl.TEXTURE_2D, this.tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.FLOAT, null);
return this;
}
setEmptyRgba(width, height) {
this.width = width;
this.height = height;
this.data = null;
gl.activeTexture(gl.TEXTURE7);
gl.bindTexture(gl.TEXTURE_2D, this.tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
return this;
}
bind(unit = 0) {
const gl = this.gl;
gl.activeTexture(gl.TEXTURE0 + unit);
gl.bindTexture(gl.TEXTURE_2D, this.tex);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
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.bindTexture(gl.TEXTURE_2D, this.tex);
return this;
}
_renderCommon(width, height, callback) {
const gl = this.gl;
const fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, this.tex, 0);
gl.viewport(0, 0, width, height);
try {
callback(this)
} finally {
gl.deleteFramebuffer(fb)
}
}
renderFloat4(width, height, callback) {
this.setEmptyFloat4(width, height);
this._renderCommon(width, height, callback);
}
renderRgba(width, height, callback) {
this.setEmptyRgba(width, height);
this._renderCommon(width, height, callback);
}
dispose() {
this.gl.deleteTexture(this.tex);
}
}
function clamp(v, min, max) {
if (v < min) return min;
if (v > max) return max;
return v;
}
function clamp0_FF(v) {
return clamp(v, 0, 0xFF);
}
function packRGBA(r, g, b, a) {
return ((r & 0xFF) << 0) |
((g & 0xFF) << 8) |
((b & 0xFF) << 16) |
((a & 0xFF) << 24);
}
class Bitmap32 {
constructor(width, height, data = null) {
if (data == null) data = new Uint8Array(width * height * 4);
this.data = data;
this.width = width;
this.height = height;
this.area = width * height;
}
static fromFloat(width, height, floats) {
const out = new Bitmap32(width, height);
const cdata = new Uint8ClampedArray(out.data.buffer);
let m = 0;
for (let y = 0; y < height; y++) {
for (let x = 0; x < width; x++) {
// noinspection PointlessArithmeticExpressionJS
cdata[m + 0] = floats[m + 0] * 255;
cdata[m + 1] = floats[m + 1] * 255;
cdata[m + 2] = floats[m + 2] * 255;
cdata[m + 3] = floats[m + 3] * 255;
m += 4;
}
}
return out;
}
toFloat() {
const area = this.area;
const out = new Float32Array(this.width * this.height * 4);
for (let n = 0; n < area * 4; n++) out[n] = this.data[n] / 255;
return out;
}
toImageData() {
return new ImageData(new Uint8ClampedArray(this.data.buffer), this.width, this.height);
}
toCanvas() {
return this.toImageData().toCanvas();
}
index(x, y) {
return (y * this.width + x) * 4;
}
valid(x, y) {
return x >= 0 && y >= 0 && x < this.width && y < this.height;
}
/**
* @return {Bitmap32}
*/
sliceCopy(left, top, right, bottom) {
const width = right - left;
const height = bottom - top;
const out = new Bitmap32(width, height);
for (let y = 0; y < height; y++) {
for (let x = 0; x < width; x++) {
const ix = x + left;
const iy = y + top;
out.set(x, y, this.valid(ix, iy) ? this.get(ix, iy) : 0)
}
}
return out;
}
set(x, y, value) {
const i = this.index(x, y);
this.data[i + 3] = (value >> 24);
this.data[i + 2] = (value >> 16);
this.data[i + 1] = (value >> 8);
this.data[i + 0] = (value >> 0);
}
get(x, y) {
const i = this.index(x, y);
return (this.data[i + 3] << 24) |
(this.data[i + 2] << 16) |
(this.data[i + 1] << 8) |
(this.data[i + 0] << 0);
}
getY(r, g, b) {
return clamp0_FF((0 + (0.299 * r) + (0.587 * g) + (0.114 * b)));
}
getCb(r, g, b) {
return clamp0_FF((128 - (0.168736 * r) - (0.331264 * g) + (0.5 * b)));
}
getCr(r, g, b) {
return clamp0_FF((128 + (0.5 * r) - (0.418688 * g) - (0.081312 * b)));
}
getR(y, cb, cr) {
return clamp0_FF((y + 1.402 * (cr - 128)));
}
getG(y, cb, cr) {
return clamp0_FF((y - 0.34414 * (cb - 128) - 0.71414 * (cr - 128)));
}
getB(y, cb, cr) {
return clamp0_FF((y + 1.772 * (cb - 128)));
}
rgbaToYCbCr() {
const out = new Bitmap32(this.width, this.height);
let m = 0;
for (let n = 0; n < out.area; n++) {
const r = this.data[m + 0];
const g = this.data[m + 1];
const b = this.data[m + 2];
const a = this.data[m + 3];
out.data[m + 0] = this.getY(r, g, b);
out.data[m + 1] = this.getCb(r, g, b);
out.data[m + 2] = this.getCr(r, g, b);
out.data[m + 3] = a;
m += 4;
}
return out;
}
yCbCrToRgba() {
const out = new Bitmap32(this.width, this.height);
let m = 0;
for (let n = 0; n < out.area; n++) {
const y = this.data[m + 0];
const cb = this.data[m + 1];
const cr = this.data[m + 2];
const a = this.data[m + 3];
out.data[m + 0] = this.getR(y, cb, cr);
out.data[m + 1] = this.getG(y, cb, cr);
out.data[m + 2] = this.getB(y, cb, cr);
out.data[m + 3] = a;
m += 4;
}
return out;
}
}
//class Bitmap32Float {
// constructor(width, height, data = null) {
// if (data == null)// data = new Float32Array(width * height * 4);
// this.width = width;
// this.height = height;
// this.data = data;
// }
//}
class BatchBuilder {
constructor() {
this.vertices = [];
this.indices = [];
this.npoints = 0;
}
addPoint(x, y, vx, vy, noutput) {
//console.log('vertex', x, y, noutput);
this.vertices.push(x);
this.vertices.push(y);
this.vertices.push(vx);
this.vertices.push(vy);
this.vertices.push(noutput);
this.npoints++;
}
addQuad(x, y, width, height, noutput) {
const vpos = this.npoints;
this.addPoint(x, y, 0, 0, noutput);
this.addPoint(x + width, y, width, 0, noutput);
this.addPoint(x, y + height, 0, height, noutput);
this.addPoint(x + width, y + height, width, height, noutput);
this.indices.push(vpos + 0);
this.indices.push(vpos + 1);
this.indices.push(vpos + 2);
this.indices.push(vpos + 2);
this.indices.push(vpos + 1);
this.indices.push(vpos + 3);
}
}
Float32Array.prototype.normalized = function () {
const out = new Float32Array(this.length);
let min = Infinity;
let max = -Infinity;
for (let n = 0; n < this.length; n++) {
min = Math.min(min, this[n]);
max = Math.max(max, this[n]);
}
const maxLen = max - min;
for (let n = 0; n < this.length; n++) {
out[n] = (this[n] - min) / maxLen;
}
return out
};
Float32Array.prototype.alphaTo1 = function () {
const out = new Float32Array(this.length);
for (let n = 0; n < this.length; n++) {
out[n] = ((n % 4) === 3) ? 1 : this[n];
}
return out
};
// document.createElement('canvas').getContext('webgl2').getSupportedExtensions()
const mycanvas = document.getElementById("mycanvas");
// {WebGLRenderingContext}
const myctx = mycanvas.getContext('2d');
const image = document.getElementById("myimage");
image.src = 'goku_small_bg.png';
//image.src = 'ss.jpg';
//image.src = 'img.png';
class Waifu2x {
waifu2x(chunk) {
const chunkY = chunk.rgbaToYCbCr();
let out = new Float32Array(this.blockSize * this.blockSize * 4);
let inp = new GlTexture2d(gl).setFloat4Data(chunkY.width, chunkY.height, chunkY.toFloat());
for (let step = 0; step < 7; step++) {
const bias = this.biases[step];
const kernel = this.kernels[step];
const program = this.programs[step];
const nInputPlane = this.steps[step].nInputPlane;
const nOutputPlane = this.steps[step].nOutputPlane;
const outXBlocks = Math.min(nOutputPlane, 16);
const outYBlocks = Math.ceil(nOutputPlane / 16);
//console.log(`nInputPlane=${nInputPlane}, nOutputPlane=${nOutputPlane}, outXBlocks=${outXBlocks}, outYBlocks=${outYBlocks}`);
let outp = new GlTexture2d(gl);
const outWidth = outXBlocks * this.blockSize;
const outHeight = outYBlocks * this.blockSize;
//const rout = new Float32Array(outWidth * outHeight * 4);
outp.renderFloat4(outWidth, outHeight, (rb) => {
program.use();
const aPos = gl.getAttribLocation(program.program, "aPos");
const aInPos = gl.getAttribLocation(program.program, "aInPos");
gl.uniform2f(gl.getUniformLocation(program.program, "pixelScale"), rb.width, rb.height);
bias.bind(0);
gl.uniform1i(gl.getUniformLocation(program.program, "bias"), 0);
gl.uniform2f(gl.getUniformLocation(program.program, "biasScale"), bias.width, bias.height);
kernel.bind(1);
gl.uniform1i(gl.getUniformLocation(program.program, "kernel"), 1);
gl.uniform2f(gl.getUniformLocation(program.program, "kernelScale"), kernel.width, kernel.height);
inp.bind(2);
gl.uniform1i(gl.getUniformLocation(program.program, "inp"), 2);
gl.uniform2f(gl.getUniformLocation(program.program, "inpScale"), inp.width, inp.height);
const bb = new BatchBuilder();
for (let n = 0; n < nOutputPlane; n++) {
let blockX = Math.floor(n % 16);
let blockY = Math.floor(n / 16);
//console.log(blockX, blockY);
bb.addQuad(blockX * this.blockSize, blockY * this.blockSize, chunkY.width - step, chunkY.height - step, n);
}
const vertexData = (new GlBuffer(gl, gl.ARRAY_BUFFER)).uploadFloats(bb.vertices).use();
const elements = (new GlBuffer(gl, gl.ELEMENT_ARRAY_BUFFER)).uploadShorts(bb.indices).use();
gl.enableVertexAttribArray(aPos);
gl.enableVertexAttribArray(aInPos);
gl.vertexAttribPointer(aPos, 2, gl.FLOAT, false, 4 * 5, 0);
gl.vertexAttribPointer(aInPos, 3, gl.FLOAT, false, 4 * 5, 4 * 2);
//gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
//console.log(bb.indices);
//console.log(bb.indices.length);
gl.drawElements(gl.TRIANGLES, bb.indices.length, gl.UNSIGNED_SHORT, 0);
//console.log(gl.getError());
elements.dispose();
vertexData.dispose();
if (step === 6) {
gl.readPixels(0, 0, outWidth, outHeight, gl.RGBA, gl.FLOAT, out);
}
});
inp.dispose();
inp = outp;
}
inp.dispose();
return Bitmap32.fromFloat(this.blockSize, this.blockSize, out.alphaTo1()).sliceCopy(7, 7, this.blockSize - 7, this.blockSize - 7).yCbCrToRgba();
}
constructor() {
this.steps = null;
this.vert = null;
this.frag = null;
this.programs = null;
this.biases = null;
this.kernels = null;
//this.blockSize = 300;
//this.blockSize = 196;
this.blockSize = 128;
//this.blockSize = 96;
//this.blockSize = 64;
//this.blockSize = 16;
//this.blockSize = 48;
}
async init() {
this.steps = await readJson('models/scale2.0x_model.json');
//console.log(model);
this.vert = await readText('waifu2x.vert');
this.frag = await readText('waifu2x.frag');
let vert = this.vert;
let frag = this.frag;
const webglCanvas = createCanvas(32, 32);
const gl = webglCanvas.getContext('webgl');
window.gl = gl;
gl.getExtension("WEBGL_color_buffer_float")
gl.getExtension('OES_texture_float');
this.programs = this.steps.map((v) => {
let prefix = `const int NUM_INPUTS = ${v.nInputPlane};`;
prefix += `const int BLOCK_SIZE = ${this.blockSize};`;
return new GlProgram(gl, `${prefix}${vert}`, `${prefix}${frag}`);
});
this.biases = this.steps.map((v) => new GlTexture2d(gl).setFloatData(new Float32Array(v.bias)));
this.kernels = this.steps.map((v) => {
const vInputPlane = v.nInputPlane;
const vOutputPlane = v.nOutputPlane;
const width = vInputPlane * 3;
const height = vOutputPlane * 3;
const out = new Float32Array(width * height);
for (let i = 0; i < vOutputPlane; i++) {
const I = v.weight[i];
const mY = i * 3;
for (let j = 0; j < vInputPlane; j++) {
const J = I[j];
const mX = j * 3;
for (let y = 0; y < 3; y++) {
const Y = J[y];
for (let x = 0; x < 3; x++) {
const vv = Y[x];
const px = mX + x;
const py = mY + y;
out[py * width + px] = vv;
}
}
}
}
return new GlTexture2d(gl).setFloatData(new Float32Array(out), vInputPlane * 3, vOutputPlane * 3)
});
gl.clearColor(1, 0, 0, 1);
gl.clear(gl.COLOR_BUFFER_BIT);
}
}
async function sleep(ms) {
return new Promise((resolve) => {
setTimeout(() => { resolve(); }, ms);
});
}
// https://gist.github.com/adrianseeley/f768fd7a3aab2370eafc
image.onload = async () => {
let waifu2x = new Waifu2x();
await waifu2x.init();
//console.log('' + kernels[0].data);
//console.log(kernels);
//program.aVertexPosition = gl.getAttribLocation(program, 'aVertexPosition');
//gl.enableVertexAttribArray();
//setInterval(function() {
//tex.setFloatData(2, 1, new Float32Array([1, 1, 1, 1, 0, 0, 0, 0]));
const img2xBase = image.toCanvas().scale(2, 2).toBitmap32();
const img2x = img2xBase.sliceCopy(-7, -7, img2xBase.width + 7, img2xBase.height + 7);
mycanvas.width = img2xBase.width;
mycanvas.height = img2xBase.height;
mycanvas.style.width = `${mycanvas.width}px`;
mycanvas.style.height = `${mycanvas.height}py`;
//myctx.globalCompositeOperation = 'copy';
myctx.globalAlpha = 0.5;
myctx.drawImage(img2x.toCanvas(), 0, 0);
myctx.globalAlpha = 1.0;
//const out = new Float32Array(128 * 128 * 4);
const blockSizeNP = waifu2x.blockSize - 14;
const xchunks = Math.ceil(img2x.width / blockSizeNP);
const ychunks = Math.ceil(img2x.height / blockSizeNP);
const startStart = Date.now();
for (let yc = 0; yc < ychunks; yc++) {
for (let xc = 0; xc < xchunks; xc++) {
let xx = xc * blockSizeNP;
let yy = yc * blockSizeNP;
const chunk = img2x.sliceCopy(xx, yy, Math.min(img2x.width, xx + blockSizeNP + 14), Math.min(img2x.height, yy + blockSizeNP + 14));
//console.log(xx, yy);
//console.log(img2x);
await sleep(0);
const start = Date.now();
const res = waifu2x.waifu2x(chunk);
const end = Date.now();
console.log(`chunk (${xc}, ${yc}): ${end - start}`);
myctx.drawImage(res.toCanvas(), xx + 7, yy + 7);
}
}
const endEnd = Date.now();
console.log('totalTime: ', endEnd - startStart);
//}, 100);
//document.body.appendChild(webglCanvas);
println("done!");
//const img = image.toCanvas().scale(2, 2).toBitmap32().sliceCopy(-7, -7, image.width * 2 + 7, image.height * 2 + 7).toCanvas();
//ImageUtils.scaleImageData(data)
//console.log(data);
//canvas.getImageData(0, 0, image.width)
};
</script>
</body>
</html>