rules/icons.mk

   1 # This is free and unencumbered software released into the public
   2 # domain. To the extent possible under law, the author of this file
   3 # waives all copyright and related or neighboring rights to it.
   4
   5 .DELETE_ON_ERROR:
   6
   7 XCF2PNG ?= xcf2png
   8
   9 %.png: %.xcf
  10         $(XCF2PNG) $< > $@
  11
  12 # First: xcf2png by default calls zcat rather than gzcat. This is
  13 # totally always broken; zcat forces a .Z extension on its input
  14 # filename. So we can't rely on xcf2png's default behavior. But it
  15 # offers -Z for a custom decompression program.
  16 #
  17 # BUT: Gimp produces gz files with some padding zeros because, I don't
  18 # know, someone might want to save their compressed xcfs to DECtape.
  19 # gzip has a -q option to not *print* the warning associated with this
  20 # harmless thing, but then goes ahead and exits non-zero anyway, which
  21 # makes xcf2png barf and die before writing anything even though it
  22 # got perfectly good data.
  23 #
  24 # So: 1) use gunzip, 2) manually feed it to xcf2png, 3) hope nothing is
  25 # set to die based on pipe status, 4) hope that if the xcf data is
  26 # actually busted xcf2png will do something helpful.
  27 %.png: %.xcf.gz
  28         gunzip -c $< | $(XCF2PNG) - > $@
  29
  30 .SECONDEXPANSION:
  31
  32 ICONUTIL ?= $(firstword $(shell command -v iconutil icnsutil) iconutil)
  33
  34 %.icns: %.iconset $$(wildcard $$(@D)/$$*.iconset/icon_*.png)
  35         $(ICONUTIL) -c icns -o $@ $<
  36
  37 %.ico: %.iconset $$(wildcard $$(@D)/$$*.iconset/icon_*[0-9].png)
  38         convert -background transparent -colors 256 $(filter-out $<,$^) $@
  39