POTRACE=/home/selinger/projects/potrace/src/potrace

.SUFFIXES: .pbm .eps -orig3.png -smooth3.png -orig2.png -smooth2.png

TARGETS = head-orig3.png head-smooth3.png head.eps
TARGETS += wheel-orig2.png wheel-smooth2.png wheel.eps
TARGETS += stanford-orig2.png stanford-smooth2.png stanford.eps
TARGETS += writing-orig2.png writing-smooth2.png writing.eps
TARGETS += faces-orig2.png faces-smooth2.png faces.eps
TARGETS += letters-orig2.png letters-smooth2.png letters.eps

all: $(TARGETS)
	chmod a+r $(TARGETS)

.pbm-smooth2.png:
	cat $+ | $(POTRACE) -gx2 | pnmdepth 15 | pnmtopng > $@

.pbm-smooth3.png:
	cat $+ | $(POTRACE) -gx3 | pnmdepth 15 | pnmtopng > $@

.pbm-orig2.png:
	cat $+ | pnmscale 2 | pnmtopng > $@

.pbm-orig3.png:
	cat $+ | pnmscale 3 | pnmtopng > $@

.pbm.eps:
	cat $+ | $(POTRACE) > $@

clean:
	rm -f $(TARGETS)