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Added layer breakdown and transparent background #21

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e22333d
Added layer breakdown and transparent background
zwollner Apr 21, 2021
0fedef7
fixed export button
zwollner May 4, 2021
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6 changes: 5 additions & 1 deletion index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,11 @@ <h1>Shape viewer</h1>
<br />

<div id="resultWrapper">
<canvas id="result" width="512" height="512"></canvas>
<canvas id="canvas" width="512" height="512"></canvas>
<canvas id="canvas1" width="125" height="125"></canvas>
<canvas id="canvas2" width="125" height="125"></canvas>
<canvas id="canvas3" width="125" height="125"></canvas>
<canvas id="canvas4" width="125" height="125"></canvas>
</div>
<button onclick="exportShape()">Export</button>
<button onclick="shareShape()">Share</button>
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248 changes: 114 additions & 134 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -102,9 +102,7 @@ CanvasRenderingContext2D.prototype.beginCircle = function (x, y, r) {

const possibleShapesString = Object.keys(enumShortcodeToSubShape).join("");
const possibleColorsString = Object.keys(enumShortcodeToColor).join("");
const layerRegex = new RegExp(
"([" + possibleShapesString + "][" + possibleColorsString + "]|-{2}){4}"
);
const layerRegex = new RegExp("([" + possibleShapesString + "][" + possibleColorsString + "]|-{2}){4}");

/////////////////////////////////////////////////////

Expand Down Expand Up @@ -160,132 +158,120 @@ function fromShortKey(key) {
}

function renderShape(layers) {
const canvas = /** @type {HTMLCanvasElement} */ (document.getElementById(
"result"
));
const context = canvas.getContext("2d");

context.save();
context.fillStyle = "#fff";

const w = 512;
const h = 512;
const dpi = 1;
context.fillRect(0, 0, w, h);

context.translate((w * dpi) / 2, (h * dpi) / 2);
context.scale((dpi * w) / 28, (dpi * h) / 28);

context.fillStyle = "#e9ecf7";

const quadrantSize = 10;
const quadrantHalfSize = quadrantSize / 2;

context.fillStyle = "rgba(40, 50, 65, 0.1)";
context.beginCircle(0, 0, quadrantSize * 1.15);
context.fill();

for (let layerIndex = 0; layerIndex < layers.length; ++layerIndex) {
const quadrants = layers[layerIndex];

const layerScale = Math.max(0.1, 0.9 - layerIndex * 0.22);

for (let quadrantIndex = 0; quadrantIndex < 4; ++quadrantIndex) {
if (!quadrants[quadrantIndex]) {
continue;
}
const { subShape, color } = quadrants[quadrantIndex];

const quadrantPos = arrayQuadrantIndexToOffset[quadrantIndex];
const centerQuadrantX = quadrantPos.x * quadrantHalfSize;
const centerQuadrantY = quadrantPos.y * quadrantHalfSize;

const rotation = radians(quadrantIndex * 90);

context.translate(centerQuadrantX, centerQuadrantY);
context.rotate(rotation);

context.fillStyle = enumColorsToHexCode[color];
context.strokeStyle = "#555";
context.lineWidth = 1;

const insetPadding = 0.0;

switch (subShape) {
case enumSubShape.rect: {
context.beginPath();
const dims = quadrantSize * layerScale;
context.rect(
insetPadding + -quadrantHalfSize,
-insetPadding + quadrantHalfSize - dims,
dims,
dims
);

break;
}
case enumSubShape.star: {
context.beginPath();
const dims = quadrantSize * layerScale;

let originX = insetPadding - quadrantHalfSize;
let originY = -insetPadding + quadrantHalfSize - dims;

const moveInwards = dims * 0.4;
context.moveTo(originX, originY + moveInwards);
context.lineTo(originX + dims, originY);
context.lineTo(originX + dims - moveInwards, originY + dims);
context.lineTo(originX, originY + dims);
context.closePath();
break;
}

case enumSubShape.windmill: {
context.beginPath();
const dims = quadrantSize * layerScale;

let originX = insetPadding - quadrantHalfSize;
let originY = -insetPadding + quadrantHalfSize - dims;
const moveInwards = dims * 0.4;
context.moveTo(originX, originY + moveInwards);
context.lineTo(originX + dims, originY);
context.lineTo(originX + dims, originY + dims);
context.lineTo(originX, originY + dims);
context.closePath();
break;
}

case enumSubShape.circle: {
context.beginPath();
context.moveTo(
insetPadding + -quadrantHalfSize,
-insetPadding + quadrantHalfSize
);
context.arc(
insetPadding + -quadrantHalfSize,
-insetPadding + quadrantHalfSize,
quadrantSize * layerScale,
-Math.PI * 0.5,
0
);
context.closePath();
break;
}

default: {
assertAlways(false, "Unkown sub shape: " + subShape);
const ctxArray = [...document.querySelectorAll('[id^="canvas"]')].map((cvs) => cvs.getContext("2d"));

for (let ctxIndex = 0; ctxIndex < ctxArray.length; ++ctxIndex) {
let context = ctxArray[ctxIndex];
context.save();
context.fillStyle = "#fff";

const w = ctxIndex == 0 ? 512 : 128;
const h = ctxIndex == 0 ? 512 : 128;

const dpi = 1;
context.clearRect(0, 0, w, h);

context.translate((w * dpi) / 2, (h * dpi) / 2);
context.scale((dpi * w) / 28, (dpi * h) / 28);

context.fillStyle = "#e9ecf7";

const quadrantSize = 10;
const quadrantHalfSize = quadrantSize / 2;

context.fillStyle = "rgba(40, 50, 65, 0.1)";
context.beginCircle(0, 0, quadrantSize * 1.15);
context.fill();

for (let layerIndex = 0; layerIndex < layers.length; ++layerIndex) {
if (ctxIndex == 0 || layerIndex + 1 == ctxIndex) {
const quadrants = layers[layerIndex];

const layerScale = Math.max(0.1, 0.9 - layerIndex * 0.22);

for (let quadrantIndex = 0; quadrantIndex < 4; ++quadrantIndex) {
if (!quadrants[quadrantIndex]) {
continue;
}
const { subShape, color } = quadrants[quadrantIndex];

const quadrantPos = arrayQuadrantIndexToOffset[quadrantIndex];
const centerQuadrantX = quadrantPos.x * quadrantHalfSize;
const centerQuadrantY = quadrantPos.y * quadrantHalfSize;

const rotation = radians(quadrantIndex * 90);

context.translate(centerQuadrantX, centerQuadrantY);
context.rotate(rotation);

context.fillStyle = enumColorsToHexCode[color];
context.strokeStyle = "#555";
context.lineWidth = 1;

const insetPadding = 0.0;

switch (subShape) {
case enumSubShape.rect: {
context.beginPath();
const dims = quadrantSize * layerScale;
context.rect(insetPadding + -quadrantHalfSize, -insetPadding + quadrantHalfSize - dims, dims, dims);

break;
}
case enumSubShape.star: {
context.beginPath();
const dims = quadrantSize * layerScale;

let originX = insetPadding - quadrantHalfSize;
let originY = -insetPadding + quadrantHalfSize - dims;

const moveInwards = dims * 0.4;
context.moveTo(originX, originY + moveInwards);
context.lineTo(originX + dims, originY);
context.lineTo(originX + dims - moveInwards, originY + dims);
context.lineTo(originX, originY + dims);
context.closePath();
break;
}

case enumSubShape.windmill: {
context.beginPath();
const dims = quadrantSize * layerScale;

let originX = insetPadding - quadrantHalfSize;
let originY = -insetPadding + quadrantHalfSize - dims;
const moveInwards = dims * 0.4;
context.moveTo(originX, originY + moveInwards);
context.lineTo(originX + dims, originY);
context.lineTo(originX + dims, originY + dims);
context.lineTo(originX, originY + dims);
context.closePath();
break;
}

case enumSubShape.circle: {
context.beginPath();
context.moveTo(insetPadding + -quadrantHalfSize, -insetPadding + quadrantHalfSize);
context.arc(insetPadding + -quadrantHalfSize, -insetPadding + quadrantHalfSize, quadrantSize * layerScale, -Math.PI * 0.5, 0);
context.closePath();
break;
}

default: {
assertAlways(false, "Unkown sub shape: " + subShape);
}
}

context.fill();
context.stroke();

context.rotate(-rotation);
context.translate(-centerQuadrantX, -centerQuadrantY);
}
}

context.fill();
context.stroke();

context.rotate(-rotation);
context.translate(-centerQuadrantX, -centerQuadrantY);
}
context.restore();
}

context.restore();
}

/////////////////////////////////////////////////////
Expand Down Expand Up @@ -335,17 +321,13 @@ window.addEventListener("load", () => {
});

window.exportShape = () => {
const canvas = document.getElementById("result");
const canvas = document.getElementById("canvas");
const imageURL = canvas.toDataURL("image/png");

const dummyLink = document.createElement("a");
dummyLink.download = "shape.png";
dummyLink.href = imageURL;
dummyLink.dataset.downloadurl = [
"image/png",
dummyLink.download,
dummyLink.href,
].join(":");
dummyLink.dataset.downloadurl = ["image/png", dummyLink.download, dummyLink.href].join(":");

document.body.appendChild(dummyLink);
dummyLink.click();
Expand Down Expand Up @@ -374,9 +356,7 @@ function getRandomShape() {
}

function getRandomColor() {
return Object.values(enumColorToShortcode)[
getRandomInt(Object.keys(enumColorToShortcode).length)
];
return Object.values(enumColorToShortcode)[getRandomInt(Object.keys(enumColorToShortcode).length)];
}

window.randomShape = () => {
Expand Down