Added preliminary files for CMake/CPack support

1 files changed, 45 insertions, 0 deletions

diff --git a/cpack/convert_images.sh b/cpack/convert_images.sh
new file mode 100644
index 0000000..3816dec
--- /dev/null
+++ b/cpack/convert_images.sh
@@ -0,0 +1,45 @@
+#!/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