after12am / webglglitch Goto Github PK
View Code? Open in Web Editor NEWA WebGL app for glitching your image or movie in realtime in your blowser.
Home Page: http://after12am.github.com/WebGLGlitch/
License: MIT License
A WebGL app for glitching your image or movie in realtime in your blowser.
Home Page: http://after12am.github.com/WebGLGlitch/
License: MIT License
I has to fix glfx.js library.
unfortunately the image is black out.
This alert is probably fixable
glitch effect in glfx.js does not use webgl. So I would better use 2d canvas?
// Get the CanvasPixelArray from the given coordinates and dimensions.
var imgd = context.getImageData(x, y, width, height);
var pix = imgd.data;
// Loop over each pixel and invert the color.
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i ] = 255 - pix[i ]; // red
pix[i+1] = 255 - pix[i+1]; // green
pix[i+2] = 255 - pix[i+2]; // blue
// i+3 is alpha (the fourth element)
}
// Draw the ImageData at the given (x,y) coordinates.
context.putImageData(imgd, x, y);
http://stackoverflow.com/questions/667045/getpixel-from-html-canvas
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