ede/build/Svg.jam

#
# $Id$
#
# Part of Equinox Desktop Environment (EDE).
# Copyright (c) 2000-2007 EDE Authors.
#
# This program is licensed under terms of the 
# GNU General Public License version 2 or newer.
# See COPYING for details.

SVG_CONVERTOR = "rsvg-convert" ;

# SvgToPng [target-png] : [source-svg] : [width] : [height] ;
rule SvgToPng
{
	if ! $(SVG_CONVERTOR) {
		Echo "SVG_CONVERTOR not defined; $(1) will not be built" ;
		return ;
	}

	LocalDepends $(1) : $(2) ;
	LocalDepends icons : $(1) ;
	LocalDepends all : $(1) ;

	PNG_WIDTH on $(1) = $(3) ;
	PNG_HEIGHT on $(1) = $(4) ;

	SvgToPng1 $(1) : $(2) ;

	LocalClean clean : $(1) ;
}

# SvgToPngDirectory [directory-where-to-place] : [directory-where-is-source] : [icon-sizes] ;
rule SvgToPngDirectory
{
	local icons source target png_ext ;

	if ! $(SVG_CONVERTOR) {
		Echo "SVG_CONVERTOR not defined; directory $(1) will not be built" ;
		return ;
	}

	png_ext = ".png" ;
	icons = [ Wildcard $(2) : *.svg ] ;

	for i in $(icons) {
		# before source and target are further used
		# grist must be calculated uniquely or jam will be confused
		# e.g. if we want foo.svg to be placed in 32/foo.png and 16/foo.png 
		# with different sizes, without unique grist, jam will construct only
		# 32/foo.png since it is bound to source; to skip this, source and
		# target are gristed to directory name plus jam's SOURCE_GRIST
		target = $(i:S=$(png_ext):G=$(SOURCE_GRIST)-$(1)) ;
		source = $(i:G=$(SOURCE_GRIST)-$(2)) ;

		# where to look for source
		SEARCH on $(source) = [ FDirName $(SUBDIR) $(2) ] ;

		# where to place target; directory will be created if
		# does not exists
		MakeLocate $(target) : [ FDirName $(SUBDIR) $(1) ] ;

		SvgToPng $(target) : $(source) : $(3) : $(3) ;
	}

	# let 'jam clean' removes created directory
	CleandirSafe clean : [ FDirName $(SUBDIR) $(1) ] ;
}

actions SvgToPng1
{
	$(SVG_CONVERTOR) -w $(PNG_WIDTH) -h $(PNG_HEIGHT) -f png "$(>)" "$(<)"
}

NotFile icons ;
Always icons ;