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More writing for the main posts

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Bradlee Speice
2024-12-09 22:18:13 -05:00
parent b608a25146
commit 0983558659
16 changed files with 155 additions and 125 deletions
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16
blog/2024-11-15-playing-with-fire/3-log-density/paintLinear.ts
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@ -1,17 +1,17 @@
export function paintLinear(width: number, histogram: Uint32Array): ImageData {
const image = new ImageData(width, histogram.length / width);
export function paintLinear(width: number, height: number, histogram: number[]): ImageData {
const image = new ImageData(width, height);
let countMax = 0;
let valueMax = 0;
for (let value of histogram) {
countMax = Math.max(countMax, value);
valueMax = Math.max(valueMax, value);
}
for (let i = 0; i < histogram.length; i++) {
const pixelIndex = i * 4;
image.data[pixelIndex] = 0; // red
image.data[pixelIndex + 1] = 0; // green
image.data[pixelIndex + 2] = 0; // blue
image.data[pixelIndex + 3] = Number(histogram[i]) / countMax * 0xff;
image.data[pixelIndex] = 0;
image.data[pixelIndex + 1] = 0;
image.data[pixelIndex + 2] = 0;
image.data[pixelIndex + 3] = histogram[i] / valueMax * 0xff;
}
return image;