yes yes hahaha yes
This commit is contained in:
parent
2cc9198e2c
commit
b4e3394809
1 changed files with 27 additions and 20 deletions
|
@ -407,11 +407,10 @@ let atariRGB = [
|
|||
* @param {RGB[]} input source scanline data, in linear RGB
|
||||
* @param {number[]} palette - current working palette, as Atari 8-bit color values (low nybble luminance, high nybble hue)
|
||||
* @param {number} n - target color count
|
||||
* @param {RGB[]} inputError
|
||||
* @param {number} y
|
||||
* @returns {{output: number[], palette: number[], error: RGB[]}}
|
||||
*/
|
||||
function decimate(input, palette, n, inputError, y) {
|
||||
function decimate(input, palette, n) {
|
||||
// to brute-force, the possible palettes are:
|
||||
// 255 * 254 * 253 = 16,386,810
|
||||
//
|
||||
|
@ -433,9 +432,6 @@ function decimate(input, palette, n, inputError, y) {
|
|||
if (error) {
|
||||
rgb.inc(error.cur[x]);
|
||||
}
|
||||
if (inputError) {
|
||||
rgb.inc(inputError[x]);
|
||||
}
|
||||
rgb.cap();
|
||||
return rgb;
|
||||
};
|
||||
|
@ -540,9 +536,9 @@ function decimate(input, palette, n, inputError, y) {
|
|||
|
||||
// Median cut!
|
||||
// https://en.wikipedia.org/wiki/Median_cut
|
||||
//let buckets = [input.slice()];
|
||||
let initial = dither(palette);
|
||||
let buckets = [initial.output.map((i) => atariRGB[palette[i]])];
|
||||
let buckets = [input.slice()];
|
||||
//let initial = dither(palette);
|
||||
//let buckets = [initial.output.map((i) => atariRGB[palette[i]])];
|
||||
let medianCut = (bucket, range) => {
|
||||
if (bucket.length < 2) {
|
||||
console.log(bucket);
|
||||
|
@ -582,19 +578,25 @@ function decimate(input, palette, n, inputError, y) {
|
|||
}
|
||||
decimated = buckets.map((bucket) => {
|
||||
// Average the RGB colors in this chunk
|
||||
//let rgb = bucket
|
||||
// .reduce((acc, rgb) => acc.inc(rgb), new RGB(0, 0, 0))
|
||||
// .divide(bucket.length);
|
||||
|
||||
// scale to the max luma
|
||||
let rgb = bucket
|
||||
.reduce((acc, rgb) => acc.inc(rgb), new RGB(0, 0, 0))
|
||||
.divide(bucket.length);
|
||||
|
||||
let avg_luma = rgb.luma();
|
||||
let lumas = bucket.map((rgb) => rgb.luma());
|
||||
let brightest = Math.max(...lumas);
|
||||
if (avg_luma > 0) {
|
||||
rgb = rgb.multiply(brightest / avg_luma);
|
||||
}
|
||||
|
||||
|
||||
// pick the luma-brightest color in the bucket
|
||||
// kinda nice but really aggressive with the colors
|
||||
/*
|
||||
let lumas = bucket.map((rgb) => rgb.luma());
|
||||
let luma = Math.max(...lumas);
|
||||
let rgb = bucket[lumas.indexOf(luma)];
|
||||
let from = rgb.luma();
|
||||
if (from > 0) {
|
||||
rgb = rgb.multiply(luma / rgb.luma());
|
||||
}
|
||||
*/
|
||||
|
||||
// Take the channel-brightest color in the bucket
|
||||
// bad
|
||||
|
@ -615,6 +617,7 @@ function decimate(input, palette, n, inputError, y) {
|
|||
Math.max(...bucket.map((rgb) => rgb.b))
|
||||
);
|
||||
*/
|
||||
|
||||
// combine the median of each channel
|
||||
// sux
|
||||
/*
|
||||
|
@ -734,9 +737,13 @@ async function convert(source) {
|
|||
|
||||
let lines = [];
|
||||
for (let y = 0; y < height; y++) {
|
||||
let error = lines[y - 1]?.error;
|
||||
let inputLine = input.slice(y * width, (y + 1) * width);
|
||||
let line = decimate(inputLine, allColors, 4, error, y);
|
||||
let inputLine = input
|
||||
.slice(y * width, (y + 1) * width);
|
||||
if (y > 0) {
|
||||
let error = lines[y - 1].error;
|
||||
inputLine = inputLine.map((rgb, x) => RGB.add(rgb, error[x]));
|
||||
}
|
||||
let line = decimate(inputLine, allColors, 4, y);
|
||||
lines.push(line);
|
||||
}
|
||||
return {
|
||||
|
|
Loading…
Reference in a new issue