Add conversion of dia source images for ebooks and pdfs

The conversion is done on the fly to generated best matched formats of
images for each transformation. The conversion requires obviously `dia` to
be installed. For PDF, additionally, `epstopdf` must be available.

Author: jnavila

latex/makepdf

@@ -15,6 +15,11 @@ def figures(lang,&block)
 		Dir["#$root/figures/18333*.png"].each do |file|
 			cp(file, file.sub(/18333fig0(\d)0?(\d+)\-tn/, '\1.\2'))
 		end
+		Dir["#$root/#{lang}/figures-dia/*.dia"].each do |file|
+			eps_dest= file.sub(/.*fig0(\d)0?(\d+).dia/, '\1.\2.eps')
+			system("dia -t eps-pango -e #$root/figures/#{eps_dest} #{file}")
+			system("epstopdf #$root/figures/#{eps_dest}")
+		end
 		cp(Dir["#$root/#{lang}/figures/*.png"],"#$root/figures")
 		cp(Dir["#$root/#{lang}/figures/*.pdf"],"#$root/figures")
 		block.call
@@ -23,6 +28,7 @@ def figures(lang,&block)
 			rm(file.gsub(/18333fig0(\d)0?(\d+)\-tn/, '\1.\2'))
 		end
 		rm(Dir["#$root/figures/*.pdf"])
+		rm(Dir["#$root/figures/*.eps"])
 	end
 end
 

makeebooks

@@ -26,7 +26,10 @@ def figures(lang,&block)
 		Dir["#{lang}/figures/*.png"].each do |file|
 			cp(file,"figures")
 		end
-
+		Dir["#{lang}/figures-dia/*.dia"].each do |file|
+			png_dest= file.sub(/.*fig0(\d)0?(\d+).dia/, 'figures/\1.\2.png')
+			system("dia -e #{png_dest} #{file}")
+		end
 		block.call
 	ensure
 		Dir["figures/18333*.png"].each do |file|