pixel-editor/js/_loadImage.js
2020-04-12 10:58:19 +02:00

62 lines
2.7 KiB
JavaScript

document.getElementById('open-image-browse-holder').addEventListener('change', function () {
if (this.files && this.files[0]) {
//make sure file is allowed filetype
var fileContentType = this.files[0].type;
if (fileContentType == 'image/png' || fileContentType == 'image/gif') {
//load file
var fileReader = new FileReader();
fileReader.onload = function(e) {
var img = new Image();
img.onload = function() {
//create a new pixel with the images dimentions
newPixel(this.width, this.height, []);
//draw the image onto the canvas
currentLayer.context.drawImage(img, 0, 0);
var colorPalette = {};
var imagePixelData = currentLayer.context.getImageData(0,0,this.width, this.height).data;
var imagePixelDataLength = imagePixelData.length;
console.log(imagePixelData);
for (var i = 0; i < imagePixelDataLength; i += 4) {
var color = imagePixelData[i]+','+imagePixelData[i + 1]+','+imagePixelData[i + 2];
if (!colorPalette[color]) {
colorPalette[color] = {r:imagePixelData[i],g:imagePixelData[i + 1],b:imagePixelData[i + 2]};
//don't allow more than 256 colors to be added
if (Object.keys(colorPalette).length >= settings.maxColorsOnImportedImage) {
alert('The image loaded seems to have more than '+settings.maxColorsOnImportedImage+' colors.');
break;
}
}
}
//create array out of colors object
var colorPaletteArray = [];
for (var color in colorPalette) {
if( colorPalette.hasOwnProperty(color) ) {
colorPaletteArray.push('#'+rgbToHex(colorPalette[color]));
}
}
console.log('COLOR PALETTE ARRAY', colorPaletteArray);
//create palette form colors array
createColorPalette(colorPaletteArray, false);
//track google event
ga('send', 'event', 'Pixel Editor Load', colorPalette.length, this.width+'/'+this.height); /*global ga*/
};
img.src = e.target.result;
};
fileReader.readAsDataURL(this.files[0]);
}
else alert('Only PNG and GIF files are allowed at this time.');
}
});