git-svn-id: http://skia.googlecode.com/svn/trunk@182 2bbb7eff-a529-9590-31e7-b0007b416f81
add 'f' to sampleapp, which writes a png file for the currnet screen git-svn-id: http://skia.googlecode.com/svn/trunk@47 2bbb7eff-a529-9590-31e7-b0007b416f81
git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81