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#!/bin/bash
# This script generates Windows bitmaps from the SVGs in this directory. The
# bitmaps are displayed by the NSIS installers generated using CPack. Inkscape
# and ImageMagick must be installed for this script to work.
INDEXED_SIZES=(16 24 32 48)
RGB_ONLY_SIZES=(64 96 128 256)
DITHER_OPTIONS="-dither riemersma"
OUTPUT_OPTIONS="+compress -strip"
svg_to_bitmap() {
inkscape -z -e rgb.png $1
# There seems to be no way to tell ImageMagick to generate an 8-bit indexed
# BMP directly, so the image has to be converted to indexed PNG first. NSIS
# seems to reject all BMP versions other than "bmp3".
convert $DITHER_OPTIONS -colors 256 +remap rgb.png png8:i8.png
convert i8.png $OUTPUT_OPTIONS bmp3:$2
rm -f rgb.png i8.png
}
# https://stackoverflow.com/a/52636645
svg_to_icon() {
for size in ${INDEXED_SIZES[@]} ${RGB_ONLY_SIZES[@]}; do
inkscape -z -e $size.png -w $size -h $size $1
done
# Windows expects some of the smaller sizes to be available in 4- and 8-bit
# indexed color formats, as well as RGB.
for size in ${INDEXED_SIZES[@]}; do
convert $DITHER_OPTIONS -colors 256 +remap $size.png png8:$size-i8.png
convert $DITHER_OPTIONS -colors 16 +remap $size.png png8:$size-i4.png
done
icons="${INDEXED_SIZES[@]/%/.png} ${INDEXED_SIZES[@]/%/-i8.png} ${INDEXED_SIZES[@]/%/-i4.png} ${RGB_ONLY_SIZES[@]/%/.png}"
convert $icons $OUTPUT_OPTIONS $2
rm -f $icons
}
rm -f *.ico *.bmp
svg_to_icon icon.svg icon.ico
svg_to_icon uninstall.svg uninstall.ico
svg_to_bitmap nsis_banner.svg nsis_banner.bmp
svg_to_bitmap nsis_header.svg nsis_header.bmp
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