# Copyright (c): Uwe Schmidt, FH Wedel
#
# You may study, modify and distribute this source code
# FOR NON-COMMERCIAL PURPOSES ONLY.
# This copyright message has to remain unchanged.
#
# Note that this document is provided 'as is',
# WITHOUT WARRANTY of any kind either expressed or implied.

SOURCES=linus.jpg tux.jpg dustpuppy.jpg


GIFS=$(SOURCES:.jpg=.gif)

GENJPGS=$(SOURCES:.jpg=_color.jpg) \
	$(SOURCES:.jpg=_flip.jpg) \
	$(SOURCES:.jpg=_flop.jpg) \
	$(SOURCES:.jpg=_append.jpg)

GENGIFS=$(SOURCES:.jpg=_trans.gif)

.PHONY : all clean color gifs tar trans flip flop append

all	: gifs color trans flop flip append

gifs	: $(GIFS)

color	: $(SOURCES:.jpg=_color.jpg)

trans	: $(SOURCES:.jpg=_trans.gif)

flop	: $(SOURCES:.jpg=_flop.jpg)

flip	: $(SOURCES:.jpg=_flip.jpg)

append	: $(SOURCES:.jpg=_append.jpg)

# default rules

%.gif : %.jpg
	convert $< $@

%_color.jpg : %.jpg
	convert -colorize 0/0/50 $< $@

%_trans.gif : %.gif
	convert -transparent "#ffffff" $< $@

%_flop.jpg : %.jpg
	convert -flop $< $@

%_flip.jpg : %.jpg
	convert -flip $< $@

%_append.jpg : %_flip.jpg %_flop.jpg %_color.jpg
	convert +append  \
	$(@:_append.jpg=_flip.jpg) \
	$(@:_append.jpg=_flop.jpg) \
	$(@:_append.jpg=.jpg) \
	$(@:_append.jpg=_color.jpg) $@

# cleanup

clean :
	-rm -f $(GENGIFS) $(GIFS) $(GENJPGS)