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refactored resize (#1562)

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Co-authored-by: h <f>
Co-authored-by: Harsh Khandeparkar <34770591+HarshKhandeparkar@users.noreply.github.com>
Co-authored-by: Jeffrey Warren <jeff@unterbahn.com>
This commit is contained in:
Rishabh Shukla
2020-10-16 10:04:59 +05:30
committed by GitHub
parent 1713751728
commit d33afe09da
2 changed files with 45 additions and 41 deletions
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42
src/modules/Resize/Module.js
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@@ -1,6 +1,3 @@
const imagejs = require('imagejs'),
pixelSetter = require('../../util/pixelSetter'),
ndarray = require('ndarray');
/* /*
* Resize the image by given percentage value * Resize the image by given percentage value
*/ */
@@ -19,44 +16,7 @@ module.exports = function Resize(options, UI) {
const step = this; const step = this;
function extraManipulation(pixels) { function extraManipulation(pixels) {
// Value above 100% scales up, and below 100% scales down return require('./Resize')(pixels, options);
const resize_value = parseInt(options.resize.slice(0, -1));
if (resize_value == 100) return pixels;
const new_width = Math.round(pixels.shape[0] * (resize_value / 100)),
new_height = Math.round(pixels.shape[1] * (resize_value / 100));
const bitmap = new imagejs.Bitmap({ width: pixels.shape[0], height: pixels.shape[1] });
for (let x = 0; x < pixels.shape[0]; x++) {
for (let y = 0; y < pixels.shape[1]; y++) {
let r = pixels.get(x, y, 0),
g = pixels.get(x, y, 1),
b = pixels.get(x, y, 2),
a = pixels.get(x, y, 3);
bitmap.setPixel(x, y, r, g, b, a);
}
}
const resized = bitmap.resize({
width: new_width,
height: new_height,
algorithm: 'bicubicInterpolation'
});
const newPix = new ndarray([], [new_width, new_height, 4]);
for (let x = 0; x < new_width; x++) {
for (let y = 0; y < new_height; y++) {
const {r, g, b, a} = resized.getPixel(x, y);
pixelSetter(x, y, [r, g, b, a], newPix);
}
}
return newPix;
} }
function output(image, datauri, mimetype, wasmSuccess) { function output(image, datauri, mimetype, wasmSuccess) {

44
src/modules/Resize/Resize.js Normal file
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@@ -0,0 +1,44 @@
const imagejs = require('imagejs'),
pixelSetter = require('../../util/pixelSetter'),
ndarray = require('ndarray');
module.exports = function Resize(pixels, options) {
const resize_value = parseInt(options.resize.slice(0, -1));
if (resize_value == 100) return pixels;
const new_width = Math.round(pixels.shape[0] * (resize_value / 100)),
new_height = Math.round(pixels.shape[1] * (resize_value / 100));
const bitmap = new imagejs.Bitmap({
width: pixels.shape[0],
height: pixels.shape[1]
});
for (let x = 0; x < pixels.shape[0]; x++) {
for (let y = 0; y < pixels.shape[1]; y++) {
let r = pixels.get(x, y, 0),
g = pixels.get(x, y, 1),
b = pixels.get(x, y, 2),
a = pixels.get(x, y, 3);
bitmap.setPixel(x, y, r, g, b, a);
}
}
const resized = bitmap.resize({
width: new_width,
height: new_height,
algorithm: 'bicubicInterpolation'
});
const newPix = new ndarray([], [new_width, new_height, 4]);
for (let x = 0; x < new_width; x++) {
for (let y = 0; y < new_height; y++) {
const { r, g, b, a } = resized.getPixel(x, y);
pixelSetter(x, y, [r, g, b, a], newPix);
}
}
return newPix;
};