Make painttype an enum #1076

Job	Run time
Windows (gcc, makefile, rviz_1, png_1, glew_1)	8m 56s
Windows (gcc, makefile, rviz_0, png_1, glew_1)	7m 6s
Unix (ubuntu-latest, gcc, mymake, rviz_1, png_1, glew_1)	3m 59s
Unix (ubuntu-latest, gcc, mymake, rviz_0, png_1, glew_1)	2m 48s
Windows (gcc, mymake, rviz_1, png_1, glew_1)	12m 40s
Windows (gcc, mymake, rviz_0, png_1, glew_1)	8m 30s
Unix (ubuntu-latest, clang, makefile, rviz_1, png_1, glew_1)	7m 15s
Unix (ubuntu-latest, gcc, makefile, rviz_1, png_1, glew_1)	5m 45s
Unix (ubuntu-latest, clang, mymake, rviz_0, png_1, glew_1)	4m 24s
Unix (ubuntu-latest, clang, makefile, rviz_0, png_1, glew_1)	5m 54s
Unix (ubuntu-latest, gcc, makefile, rviz_0, png_1, glew_1)	5m 39s
Unix (ubuntu-latest, clang, mymake, rviz_1, png_1, glew_1)	6m 1s
	1h 18m 57s

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