Index: doc/theses/thierry_delisle/Makefile
===================================================================
--- doc/theses/thierry_delisle/Makefile	(revision 5ff188f3cd236584cfa7f3b12ea210fdd51bde8a)
+++ doc/theses/thierry_delisle/Makefile	(revision e76bd39e8180f90ceda3cbab1ae87e29d3273deb)
@@ -122,4 +122,15 @@
 	fig2dev -L pstex_t -p $@ $< > $@_t
 
+#-----------------------------------------------------------------------------------
+# Tools to generate png files
+# to create a png we create a pdf and convert it to png
+%.png : build/%.pstex figures/%.tex
+	echo ${basename $@}
+	${LaTeX} figures/${basename $@}.tex
+	dvips build/${basename $@}.dvi -o build/${basename $@}.ps
+	ps2pdf build/${basename $@}.ps
+	convert -negate ${basename $@}.pdf $@
+
+# creating a pdf of a figure requires generating some latex that just includes the figure
 figures/%.tex: build/%.pstex
 	echo -n 	"\documentclass[preview]{standalone}\n" 	\
@@ -134,11 +145,4 @@
 			"\end{document}" > $@
 
-%.png : build/%.pstex figures/%.tex
-	echo ${basename $@}
-	${LaTeX} figures/${basename $@}.tex
-	dvips build/${basename $@}.dvi -o build/${basename $@}.ps
-	ps2pdf build/${basename $@}.ps
-	convert -negate ${basename $@}.pdf $@
-