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-rw-r--r--lib/pnm.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/pnm.h b/lib/pnm.h
index 9191ef96..0625cb5c 100644
--- a/lib/pnm.h
+++ b/lib/pnm.h
@@ -5,6 +5,8 @@
 #define _PNM_H_
 
 #include <netpbm/pm.h>
+#include <netpbm/pbm.h>
+#include <netpbm/pgm.h>
 #include <netpbm/ppm.h>
 
 #ifdef __cplusplus
@@ -135,6 +137,16 @@ pnm_xeltopixel(xel const inputxel,
                int const format);
 
 xel
+pnm_pixeltoxel(pixel const inputPixel);
+
+xel
+pnm_graytoxel(gray const inputGray);
+
+xel
+pnm_bittoxel(bit    const inputBit,
+             xelval const maxval);
+
+xel
 pnm_parsecolorxel(const char * const colorName,
                   xelval       const maxval,
                   int          const format);