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Updating the gradient method to accept Uint8Array #42

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Updating the gradient method to accept Uint8Array #42

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24 changes: 18 additions & 6 deletions simpleheat.js
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Original file line number Diff line number Diff line change
Expand Up @@ -83,15 +83,27 @@ simpleheat.prototype = {
canvas.width = 1;
canvas.height = 256;

for (var i in grad) {
gradient.addColorStop(+i, grad[i]);
}
if (Object.prototype.toString.call(grad) === '[object Object]') {

ctx.fillStyle = gradient;
ctx.fillRect(0, 0, 1, 256);
for (var i in grad) {
gradient.addColorStop(+i, grad[i]);
}

this._grad = ctx.getImageData(0, 0, 1, 256).data;
ctx.fillStyle = gradient;
ctx.fillRect(0, 0, 1, 256);

} else if (Object.prototype.toString.call(grad) === '[object Uint8Array]') {

canvas.width = 256;
const imgData = ctx.createImageData(1, 256);
imgData.data.set(grad);
ctx.putImageData(imgData, 0, 0);

} else {
throw new Error('Color Scale is undefined.');
}

this._grad = ctx.getImageData(0, 0, 1, 256).data;
return this;
},

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