I want to get access to all the pixels that are being drawn to the screen so I can manipulate them. For instance; I’ve got a little animation of a moving cube and want to filter certain colors, or apply a blur to it (not just to the cube but to the entire window).
How can I get access to the pixels in a fast way? I tried uiting grabScreen but grabbing the entire window in each frame is very slow.
I’m not sure what to do since I’m used to Processing in which loadPixels() would get you the pixels, and after editing them you simply call updatePixels() to ‘save’ the changes so you can show them.
I’ve read the OF for Processing users page on the wiki, but the example for editing the pixels of the screen is just this:
ofImage theScreen; //declare variable theScreen.grabScreen(0,0,1024,768); //grab at 0,0 a rect of 1024x768. Equivalent to loadPixels(); //edit pixels in theScreen theScreen.draw(0,0); //equivalent to updatePixels();
I get how I can read the pixel values of an image, but I seem to get lost when I want to edit and display them.