var QUALITY_X = 2, QUALITY_Y = 1, WIDTH = Math.floor(window.innerWidth / QUALITY_X), HEIGHT = Math.floor(window.innerHeight / QUALITY_Y), SIZE = WIDTH * HEIGHT, HEIGHT_HALF = Math.floor(HEIGHT / 2), TEXT_OFFSETY = Math.floor((HEIGHT - 64) / 2), context, image, data, buffer1, buffer2, tempbuffer, canvasHeightMap, contextHeightMap, imageHeightMap, dataHeightMap, canvasText, contextText, imageText, d