javascript Programming Glossary: pixeldata

How can I perform flood fill with HTML Canvas?

http://stackoverflow.com/questions/2106995/how-can-i-perform-flood-fill-with-html-canvas

may be edge cases where it doesn't work. function getPixel pixelData x y if x 0 y 0 x pixelData.width y pixelData.height return NaN.. doesn't work. function getPixel pixelData x y if x 0 y 0 x pixelData.width y pixelData.height return NaN var pixels pixelData.data.. getPixel pixelData x y if x 0 y 0 x pixelData.width y pixelData.height return NaN var pixels pixelData.data var i y pixelData.width..

Hit detection on non-transparent pixel

http://stackoverflow.com/questions/2878511/hit-detection-on-non-transparent-pixel

it. id ctx.getImageData 0 0 img.width img.height Get the pixelData of image id.data y width x 4 3 for the alpha value of pixel..

How to get a pixel's x,y coordinate color from an image?

http://stackoverflow.com/questions/8751020/how-to-get-a-pixels-x-y-coordinate-color-from-an-image

position. This can then be used to acquire the pixel var pixelData canvas.getContext '2d' .getImageData event.offsetX event.offsetY.. 1 1 .data Because you are only grabbing one pixel pixelData is a four entry array containing the pixel's R G B and A values...