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path: root/pkgs/games/eduke32/convert-bmp-to-png.diff
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diff --git a/GNUmakefile b/GNUmakefile
index f83f04d..25a4fa8 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -798,6 +798,9 @@ libklzw$(DLLSUFFIX): $(engine_src)/klzw.cpp
 	$(COMPILE_STATUS)
 	$(RECIPE_IF) $(COMPILER_C) -shared -fPIC $< -o $@ $(RECIPE_RESULT_COMPILE)
 
+%.png: %.bmp
+	gm convert $< $@
+
 # to debug the tools link phase, make a copy of this rule explicitly replacing % with the name of a tool, such as kextract
 %$(EXESUFFIX): $(tools_obj)/%.$o $(foreach i,tools $(tools_deps),$(call expandobjs,$i))
 	$(LINK_STATUS)
@@ -880,7 +883,7 @@ $$($1_obj)/%.$$o: $$($1_rsrc)/%.c | $$($1_obj)
 	$$(call MKDIR,$$(dir $$@))
 	$$(RECIPE_IF) $$(COMPILER_C) $$($1_cflags) -c $$< -o $$@ $$(RECIPE_RESULT_COMPILE)
 
-$$($1_obj)/%_banner.c: $$($1_rsrc)/%.bmp | $$($1_obj)
+$$($1_obj)/%_banner.c: $$($1_rsrc)/%.png | $$($1_obj)
 	echo "#include \"gtkpixdata_shim.h\"" > $$@
 	gdk-pixbuf-csource --extern --struct --raw --name=startbanner_pixdata $$^ | sed 's/load_inc//' >> $$@