patlecat

patlecat / gist:59f8372248f599c2ef7009a457819862

Created June 13, 2016 12:19

How to correctly resize a GIF with GraphicsMagick >1.3.18

	## Commandline for GM, a GIF resize in 3 steps
	# Analyze the GIF frames
	gm identify -format "File_size: %b, Unique_colors: %k, Bit_depth: %q, Orig Dimensions: %hx%wpx\n" original.gif

	# Apply a coalesce with correct colors and depth (from identify) and no dither (has to come in front to work)
	gm convert original.gif +dither -depth 8 -colors 135 -coalesce gm_resize_new_big.gif

	# Okay resize now and make sure it won't try to dither again!
	gm convert gm_resize_new_big.gif +dither -resize 100x100 gm_resize_new_small.gif

patlecat / gist:3983364

Created October 30, 2012 22:03 — forked from paulirish/gist:3910471

Javascript: Page visibility API

	// this is the least sucky way i could think of to
	// detect and deal with a cross-browser impl of the page visibility api
	// forks welcome.


	function getHiddenProp(){
	var prefixes = ['webkit','moz','ms','o'];

	if ('hidden' in document) return 'hidden';

patlecat / gist:3983224

Created October 30, 2012 21:34 — forked from padolsey/gist:527683

Javascript: IE version detector

	// ----------------------------------------------------------
	// A short snippet for detecting versions of IE in JavaScript
	// without resorting to user-agent sniffing
	// ----------------------------------------------------------
	// If you're not in IE (or IE version is less than 5) then:
	// ie === undefined
	// If you're in IE (>=5) then you can determine which version:
	// ie === 7; // IE7
	// Thus, to detect IE:
	// if (ie) {}