Aha, this seems to be a more sensible way of getting screenshots:

[sgt/puzzles] / icons / Makefile

# Makefile for Puzzles icons.

PUZZLES = blackbox bridges cube dominosa fifteen flip guess inertia lightup \
          loopy map mines net netslide pattern pegs rect samegame sixteen \
          slant solo tents twiddle untangle

BASE = $(patsubst %,%-base.png,$(PUZZLES))
WEB = $(patsubst %,%-web.png,$(PUZZLES))

IBASE = $(patsubst %,%-ibase.png,$(PUZZLES))
IBASE4 = $(patsubst %,%-ibase4.png,$(PUZZLES))
P48D24 = $(patsubst %,%-48d24.png,$(PUZZLES))
P48D8 = $(patsubst %,%-48d8.png,$(PUZZLES))
P48D4 = $(patsubst %,%-48d4.png,$(PUZZLES))
P32D24 = $(patsubst %,%-32d24.png,$(PUZZLES))
P32D8 = $(patsubst %,%-32d8.png,$(PUZZLES))
P32D4 = $(patsubst %,%-32d4.png,$(PUZZLES))
P16D24 = $(patsubst %,%-16d24.png,$(PUZZLES))
P16D8 = $(patsubst %,%-16d8.png,$(PUZZLES))
P16D4 = $(patsubst %,%-16d4.png,$(PUZZLES))
ICONS = $(patsubst %,%.ico,$(PUZZLES))
CICONS = $(patsubst %,%-icon.c,$(PUZZLES))
RC = $(patsubst %,%.rc,$(PUZZLES))

BIN = ../
PIC = ./

base: $(BASE)
web: $(WEB)
pngicons: $(P48D24) $(P32D24) $(P16D24)
winicons: $(ICONS) $(RC)
gtkicons: $(CICONS)

# Build the base puzzle screenshots from which all the other images
# are derived. Some of them involve showing a move animation
# part-way through.
fifteen-base.png : override REDO=0.3
flip-base.png : override REDO=0.3
netslide-base.png : override REDO=0.3
sixteen-base.png : override REDO=0.3
twiddle-base.png : override REDO=0.3
$(BASE): %-base.png: $(BIN)% $(PIC)%.sav
	$(PIC)screenshot.sh $(BIN)$* $(PIC)$*.sav $@ $(REDO)

# Build the screenshots for the web, by scaling the original base
# images to a uniform size.
$(WEB): %-web.png: %-base.png
	$(PIC)square.pl 150 5 $^ $@

# Build the base _icon_ images, by careful cropping of the base
# images: icons are very small so it's often necessary to zoom in
# on a smaller portion of the screenshot.
blackbox-ibase.png : override CROP=352x352 144x144+0+208
bridges-ibase.png : override CROP=264x264 107x107+157+157
dominosa-ibase.png : override CROP=304x272 152x152+152+0
fifteen-ibase.png : override CROP=240x240 120x120+0+120
flip-ibase.png : override CROP=288x288 145x145+120+72
guess-ibase.png : override CROP=263x420 178x178+75+17
inertia-ibase.png : override CROP=321x321 128x128+193+0
lightup-ibase.png : override CROP=256x256 112x112+144+0
loopy-ibase.png : override CROP=257x257 113x113+0+0
mines-ibase.png : override CROP=240x240 110x110+130+130
net-ibase.png : override CROP=193x193 113x113+0+80
netslide-ibase.png : override CROP=289x289 144x144+0+0
pattern-ibase.png : override CROP=384x384 223x223+0+0
pegs-ibase.png : override CROP=263x263 147x147+116+0
rect-ibase.png : override CROP=205x205 115x115+90+0
sixteen-ibase.png : override CROP=288x288 144x144+144+144
slant-ibase.png : override CROP=321x321 160x160+160+160
solo-ibase.png : override CROP=321x321 97x97+16+16
tents-ibase.png : override CROP=320x320 165x165+142+0
twiddle-ibase.png : override CROP=192x192 102x102+69+21
untangle-ibase.png : override CROP=320x320 164x164+3+116
$(IBASE): %-ibase.png: %-base.png
	$(PIC)crop.sh $^ $@ $(CROP)

# Convert the full-size icon images to 4-bit colour, because that
# seems to work better than reducing it in 24 bits and then
# dithering.
$(IBASE4): %-ibase4.png: %-ibase.png
	convert -colors 16 +dither -map $(PIC)win16pal.xpm $^ $@

# Build the 24-bit PNGs for the icons, at three sizes.
$(P48D24): %-48d24.png: %-ibase.png
	$(PIC)square.pl 48 4 $^ $@
$(P32D24): %-32d24.png: %-ibase.png
	$(PIC)square.pl 32 2 $^ $@
$(P16D24): %-16d24.png: %-ibase.png
	$(PIC)square.pl 16 1 $^ $@

# The 8-bit icon PNGs are just custom-paletted quantisations of the
# 24-bit ones.
$(P48D8) $(P32D8) $(P16D8): %d8.png: %d24.png
	convert -colors 256 $^ $@

# But the depth-4 images work better if we re-shrink from the
# ibase4 versions of the images, and then normalise the colours
# again afterwards. (They're still not very good, but my hope is
# that on most modern Windows machines this won't matter too
# much...)
$(P48D4): %-48d4.png: %-ibase4.png
	$(PIC)square.pl 48 1 $^ tmp2.png
	convert -colors 16 -map $(PIC)win16pal.xpm tmp2.png $@
	rm -f tmp.png tmp2.png
$(P32D4): %-32d4.png: %-ibase.png
	$(PIC)square.pl 32 1 $^ tmp2.png
	convert -colors 16 -map $(PIC)win16pal.xpm tmp2.png $@
	rm -f tmp.png tmp2.png
$(P16D4): %-16d4.png: %-ibase.png
	$(PIC)square.pl 16 1 $^ tmp2.png
	convert -colors 16 -map $(PIC)win16pal.xpm tmp2.png $@
	rm -f tmp.png tmp2.png

# Build the actual Windows icons themselves, by feeding all those
# PNGs to my icon builder script.
$(ICONS): %.ico: %-48d24.png %-48d8.png %-48d4.png \
                 %-32d24.png %-32d8.png %-32d4.png \
                 %-16d24.png %-16d8.png %-16d4.png
	$(PIC)icon.pl $? > $@

# Build the .RC files which bind the icons into the applications.
$(RC): %.rc:
	echo '200 ICON "$*.ico"' > $@

# Build the GTK icon source files.
$(CICONS): %-icon.c: %-16d24.png %-32d24.png %-48d24.png
	$(PIC)cicon.pl $^ > $@	

clean:
	rm -f *.png *.ico *.rc *-icon.c