# Makefile for a generic version of the logo
# Last edited on 2010-03-07 17:48:13 by stolfilocal

# This file is designed to be included by Makefiles in 
# the subdirectory of a apecific version of the logo.

######################################################################
# For sub-make - caller must define 
#   ${PREFIX} = prefix for all file names (e.g. "ic-logo")
#   ${VARSIZES} = list of pairs {VAR}:{SIZE}:{BGCOLOR}
#      where {VAR} is an image variant, {SIZE} is a width in pixels, 
#      and {BGCOLOR} is a background color value in hexadecimal RGB,
#      e.g. "fancy:0800:FFFFFF plain:0800:000000 plain:0400:8FFFFF".
#   ${ACTIONS} = which actions to perform (clean, build-eps, show-eps, etc.)

ifneq "/${PREFIX}" "/" 
ifneq "/${VARSIZES}" "/" 
ifneq "/${ACTIONS}" "/" 

# Actions to perform for each variant:
ACTIONS_SINGLE := ${addsuffix -single,${ACTIONS}}

.PHONY: all

all:
	@-echo "ACTIONS_SINGLE = ${ACTIONS_SINGLE}"
	for vs in ${VARSIZES} ; do \
          ${MAKE} PREFIX=${PREFIX} VARSIZE=$$vs ${ACTIONS_SINGLE} dummy ; \
        done
 
# Dummy action
# This is useful because "make" with no action makes "all"
# and this leads to infinite recursion, with disastrous results.
dummy:
	@-echo "++++++++++++++++++++++++++++++++++++++++++++++++++"

######################################################################
# For sub-make - caller must define also ${VAR} ${SIZE}

VARSIZE :=

ifneq "/${VARSIZE}" "/" 

ARG_FIELDS := ${subst :, ,${VARSIZE}}
VAR :=     ${word 1,${ARG_FIELDS}}
SIZE :=    ${word 2,${ARG_FIELDS}}
BGCOLOR := ${word 3,${ARG_FIELDS}}

.PHONY: clean-single build-eps-single show-eps-single

PNG_FILE := ${PREFIX}-${VAR}.png

TEMP_PNG_FILE := /tmp/${PREFIX}-${VAR}.png

EPS_FILE := ${PREFIX}-${VAR}-${SIZE}.eps

# PSVIEW := ghostview
PSVIEW := gv

debug-single: 
	@-echo "PREFIX := ${PREFIX}"
	@-echo "VAR    := ${VAR}"
	@-echo "SIZE   := ${SIZE}"

build-eps-single: ${EPS_FILE}

${EPS_FILE}: ${PNG_FILE}
	convert \
            -size ${SIZE}x${SIZE} xc:'#${BGCOLOR}00' \
            \( ${PNG_FILE} -resize '${SIZE}x' \) \
            -compose SrcOver \
            -composite ${TEMP_PNG_FILE}
	-display ${TEMP_PNG_FILE}
	convert \
            ${TEMP_PNG_FILE} \
            PPM:- \
          | pamdepth 255 \
          | pnmtopsx \
            -rle \
            -noturn \
            -scale '0.25' \
          > ${EPS_FILE}
	rm ${TEMP_PNG_FILE}
	ls -l ${EPS_FILE}
        
show-eps-single: ${EPS_FILE}       
	-${PSVIEW} ${EPS_FILE}

JPG_FILE := ${PREFIX}-${VAR}-${SIZE}.jpg

build-jpg-single: ${JPG_FILE}

${JPG_FILE}: ${PNG_FILE}
	convert \
            -page +0+0 \( ${PNG_FILE} -resize '${SIZE}x' \) \
            -size ${SIZE}x${SIZE} xc:'#FFFFFF00' \
            -quality 98 \
            -flatten ${JPG_FILE}
	ls -l ${JPG_FILE}
        
show-jpg-single: ${JPG_FILE}       
	-display ${JPG_FILE}

clean-single:
	/bin/rm -f '${EPS_FILE}' '${JPG_FILE}' '${TEMP_PNG_FILE}'

endif
# End ${VARSIZE} section
######################################################################

endif
endif
endif
# End section ${PREFIX} ${VARSIZES} ${ACTIONS}
######################################################################