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greyscale and invert in util

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This commit is contained in:
Daniel Odendahl Jr
2017-10-13 20:55:18 +00:00
parent 1a377f55b5
commit 04668928b1
5 changed files with 31 additions and 35 deletions
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commands/avatar-edit/greyscale.js
+2 -9
View File
@@ -1,6 +1,7 @@
const { Command } = require('discord.js-commando');
const { createCanvas, loadImage } = require('canvas');
const snekfetch = require('snekfetch');
const { greyscale } = require('../../structures/Util');
module.exports = class GreyscaleCommand extends Command {
constructor(client) {
@@ -38,15 +39,7 @@ module.exports = class GreyscaleCommand extends Command {
const canvas = createCanvas(avatar.width, avatar.height);
const ctx = canvas.getContext('2d');
ctx.drawImage(avatar, 0, 0);
const imgData = ctx.getImageData(0, 0, avatar.width, avatar.height);
const { data } = imgData;
for (let i = 0; i < data.length; i += 4) {
const brightness = (0.34 * data[i]) + (0.5 * data[i + 1]) + (0.16 * data[i + 2]);
data[i] = brightness;
data[i + 1] = brightness;
data[i + 2] = brightness;
}
ctx.putImageData(imgData, 0, 0);
greyscale(ctx, 0, 0, avatar.width, avatar.height);
return msg.say({ files: [{ attachment: canvas.toBuffer(), name: 'greyscale.png' }] });
} catch (err) {
return msg.say(`Oh no, an error occurred: \`${err.message}\`. Try again later!`);
commands/avatar-edit/invert.js
+2 -8
View File
@@ -1,6 +1,7 @@
const { Command } = require('discord.js-commando');
const { createCanvas, loadImage } = require('canvas');
const snekfetch = require('snekfetch');
const { invert } = require('../../structures/Util');
module.exports = class InvertCommand extends Command {
constructor(client) {
@@ -37,14 +38,7 @@ module.exports = class InvertCommand extends Command {
const canvas = createCanvas(avatar.width, avatar.height);
const ctx = canvas.getContext('2d');
ctx.drawImage(avatar, 0, 0);
const imgData = ctx.getImageData(0, 0, avatar.width, avatar.height);
const { data } = imgData;
for (let i = 0; i < data.length; i += 4) {
data[i] = 255 - data[i];
data[i + 1] = 255 - data[i + 1];
data[i + 2] = 255 - data[i + 2];
}
ctx.putImageData(imgData, 0, 0);
invert(ctx, 0, 0, avatar.width, avatar.height);
return msg.say({ files: [{ attachment: canvas.toBuffer(), name: 'invert.png' }] });
} catch (err) {
return msg.say(`Oh no, an error occurred: \`${err.message}\`. Try again later!`);
commands/avatar-edit/rip.js
+2 -9
View File
@@ -2,6 +2,7 @@ const { Command } = require('discord.js-commando');
const { createCanvas, loadImage } = require('canvas');
const snekfetch = require('snekfetch');
const path = require('path');
const { greyscale } = require('../../structures/Util');
module.exports = class RIPCommand extends Command {
constructor(client) {
@@ -41,15 +42,7 @@ module.exports = class RIPCommand extends Command {
const ctx = canvas.getContext('2d');
ctx.drawImage(base, 0, 0);
ctx.drawImage(avatar, 158, 51, 200, 200);
const imgData = ctx.getImageData(158, 51, 200, 200);
const { data } = imgData;
for (let i = 0; i < data.length; i += 4) {
const brightness = (0.34 * data[i]) + (0.5 * data[i + 1]) + (0.16 * data[i + 2]);
data[i] = brightness;
data[i + 1] = brightness;
data[i + 2] = brightness;
}
ctx.putImageData(imgData, 158, 51);
greyscale(ctx, 158, 51, 200, 200);
return msg.say({ files: [{ attachment: canvas.toBuffer(), name: 'rip.png' }] });
} catch (err) {
return msg.say(`Oh no, an error occurred: \`${err.message}\`. Try again later!`);
commands/avatar-edit/thug-life.js
+2 -9
View File
@@ -2,6 +2,7 @@ const { Command } = require('discord.js-commando');
const { createCanvas, loadImage } = require('canvas');
const snekfetch = require('snekfetch');
const path = require('path');
const { greyscale } = require('../../structures/Util');
module.exports = class ThugLifeCommand extends Command {
constructor(client) {
@@ -39,16 +40,8 @@ module.exports = class ThugLifeCommand extends Command {
const canvas = createCanvas(avatar.width, avatar.height);
const ctx = canvas.getContext('2d');
ctx.drawImage(avatar, 0, 0);
greyscale(0, 0, avatar.width, avatar.height);
ctx.drawImage(base, 0, 0, avatar.width, avatar.height);
const imgData = ctx.getImageData(0, 0, avatar.width, avatar.height);
const { data } = imgData;
for (let i = 0; i < data.length; i += 4) {
const brightness = (0.34 * data[i]) + (0.5 * data[i + 1]) + (0.16 * data[i + 2]);
data[i] = brightness;
data[i + 1] = brightness;
data[i + 2] = brightness;
}
ctx.putImageData(imgData, 0, 0);
return msg.say({ files: [{ attachment: canvas.toBuffer(), name: 'thug-life.png' }] });
} catch (err) {
return msg.say(`Oh no, an error occurred: \`${err.message}\`. Try again later!`);
structures/Util.js
+23
View File
@@ -60,6 +60,29 @@ class Util {
static pad(text, prefix) {
return `${prefix.slice(text.length)}${text}`;
}
static greyscale(ctx, x, y, width, height) {
const data = ctx.getImageData(x, y, width, height);
for (let i = 0; i < data.data.length; i += 4) {
const brightness = (0.34 * data.data[i]) + (0.5 * data.data[i + 1]) + (0.16 * data.data[i + 2]);
data.data[i] = brightness;
data.data[i + 1] = brightness;
data.data[i + 2] = brightness;
}
ctx.putImageData(data, x, y);
return ctx;
}
static invert(ctx, x, y, width, height) {
const data = ctx.getImageData(x, y, width, height);
for (let i = 0; i < data.data.length; i += 4) {
data.data[i] = 255 - data.data[i];
data.data[i + 1] = 255 - data.data[i + 1];
data.data[i + 2] = 255 - data.data[i + 2];
}
ctx.putImageData(data, x, y);
return ctx;
}
}
module.exports = Util;