imagelib's Introduction

imageLib.js

Module for processing and manipulation images on pure JavaScript

npm install imagelib -g

Install zlib:

npm install zlib -g

Example

var imageLib = require('./imageLib.js');

imageLib(200, 200).create(function() {
    var x, y;

	for(x=20; x < 180; x++) {
		for(y=20; y < 40; y++) {
			this.setPixel(x, y, 255, 0, 0, 255); // black
		}
	}
	
	for(y=0; y < this.height; y++) {
		this.setPixel(0, y, 255, 0, 0, 255);
		this.setPixel(this.width-1, y, 255, 0, 0, 255);
	}

	for(x=0; x < this.width; x++) {
		this.setPixel(x, 0, 255, 0, 0, 255);
		this.setPixel(x, this.height-1, 255, 0, 0, 255);
	}
	
	this.toPng('./images/simple.png');
	this.toJpeg('./images/simple.jpg');
});

API

constructor(mixed first_argument[, int second_argument])

create(function callback)

jpegToData(function callback)

bmpToData(function callback)

pngToData(function callback)

array getPixel(int x, int y)

setPixel(int x, int y, int r, int g, int b, int a)

resize(int width, int height[, boolean interpolation])

pasteTo(resourse toImage, int x, int y[, boolean blending])

toPng(string file[, function callback])

toJpeg(string file[, function callback, [int quality]])

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imagelib's Issues

Copy partly-transparent images to white canvas

Hi! Great work :-) Is there any way to copy (party) transparent icons to a white canvas? Either its milky or its transparent :-(

var img = require('./libs/image-lib/imageLib.js')

img('./demo-app/images/icon.png').pngToData(function () {
  this.resize(160, 160, true)
  var icon = this
  
  img(180, 180).create(function () {
    
    for(x=0; x <= 180; x++) {
      for(y=0; y <= 180; y++) {
        this.setPixel(x, y, 255, 255, 255, 1);
      }
    }
    
    var canvas = this
    
    icon.pasteTo(canvas, 10, 10, false)
    
    canvas.toPng('./test.png')
    
  })  
  
})