Use the following ImageMagick Use Flags for ebps images

sudo USE="png jpeg" emerge =imagemagick-6.7.8.7

Use the following ImageMagick Use Flags for Tageskosten Grafiken

sudo USE="png jpeg truetype" emerge =imagemagick-6.7.8.7 (6.7.8.7 is needed for rmagick with Ruby-1.8.6)

rmagick 2.11.0 will compile against imagemagick-6.7.8.7