The iPhone4 comes with a super high-res display and to leverage that encourages App Developers to provide all artwork twofold – once „normal“ and once in double resolution named equally with a „
To ease my designers’ life and avoid confusion (and designers are easily confused I found) I ask them to provide the high-res artwork only and I scale it down myself. And as this is a reoccuring task, I automated via a Makefile like this:
#!/usr/bin/make # Make help: http://www.gnu.org/software/make/manual/html_node/Phony-Targets.html#Phony-Targets # Requires ImageMagick, Installation per macport: $ sudo port install imagemagick +no_x11 CONVERT := convert # Where are the images? ASSETS_DIR := . # Which ones? All @2x.png plus twins without @2x.png ASSETS_HIGH := $(wildcard $(ASSETS_DIR)/*@2x.png) ASSETS_LOW := $(patsubst %@2x.png,%.png,$(ASSETS_HIGH)) # The scaling command %.png: %@2x.png convert $< -resize 50% $@ assets: $(ASSETS_LOW) clean: -rm $(ASSETS_LOW)
See also my link collection about high-res images and my general Xcode project setup.