initial attempt to replace netpbm with pnmio

bob/io/image/pnmio.h

+/*
+ * File       : pnmio.h
+ * Description: Header file for pnmio.c.
+ * Author     : Nikolaos Kavvadias <nikolaos.kavvadias@gmail.com>
+ * Copyright  : (C) Nikolaos Kavvadias 2012, 2013, 2014, 2015, 2016
+ * Website    : http://www.nkavvadias.com
+ *
+ * This file is part of libpnmio, and is distributed under the terms of the
+ * Modified BSD License.
+ *
+ * A copy of the Modified BSD License is included with this distribution
+ * in the file LICENSE.
+ * libpnmio is free software: you can redistribute it and/or modify it under the
+ * terms of the Modified BSD License.
+ * libpnmio is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the Modified BSD License for more details.
+ *
+ * You should have received a copy of the Modified BSD License along with
+ * libpnmio. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PNMIO_H
+#define PNMIO_H
+
+#include <stdio.h>
+
+/* PNM/PFM image data file format definitions. */
+#define PBM_ASCII         1
+#define PGM_ASCII         2
+#define PPM_ASCII         3
+#define PBM_BINARY        4
+#define PGM_BINARY        5
+#define PPM_BINARY        6
+#define PAM               7 /* reserved */
+                            /* 8-15: reserved */
+#define PFM_RGB          16 /* F */
+#define PFM_GREYSCALE    17 /* f */
+
+#define IS_BIGENDIAN(x)   ((*(char*)&x) == 0)
+#define IS_LITTLE_ENDIAN  (1 == *(unsigned char *)&(const int){1})
+#ifndef FALSE
+#define FALSE             0
+#endif
+#ifndef TRUE
+#define TRUE              1
+#endif
+
+
+/* PNM/PFM API. */
+int  get_pnm_type(FILE *f);
+void read_pbm_header(FILE *f, int *img_xdim, int *img_ydim, int *is_ascii);
+void read_pgm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors,
+       int *is_ascii);
+void read_ppm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors,
+       int *is_ascii);
+void read_pfm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_type,
+       int *endianess);
+void read_pbm_data(FILE *f, int *img_in, int is_ascii);
+void read_pgm_data(FILE *f, int *img_in, int is_ascii);
+void read_ppm_data(FILE *f, int *img_in, int is_ascii);
+void read_pfm_data(FILE *f, float *img_in, int img_type, int endianess);
+void write_pbm_file(FILE *f, int *img_out, char *img_out_fname,
+       int x_size, int y_size, int x_scale_val, int y_scale_val, int linevals,
+       int is_ascii);
+void write_pgm_file(FILE *f, int *img_out, char *img_out_fname,
+       int x_size, int y_size, int x_scale_val, int y_scale_val,
+       int img_colors, int linevals, int is_ascii);
+void write_ppm_file(FILE *f, int *img_out, char *img_out_fname,
+       int x_size, int y_size, int x_scale_val, int y_scale_val,
+       int img_colors, int is_ascii);
+void write_pfm_file(FILE *f, float *img_out, char *img_out_fname,
+       int x_size, int y_size, int img_type, int endianess);
+
+/* Helper/auxiliary functions. */
+int   ReadFloat(FILE *fptr, float *f, int swap);
+int   WriteFloat(FILE *fptr, float *f, int swap);
+int   floatEqualComparison(float A, float B, float maxRelDiff);
+float frand(void);
+int   log2ceil(int inpval);
+
+#endif /* PNMIO_H */

setup.py

@@ -456,6 +456,7 @@ setup(
           "bob/io/image/png.cpp",
           "bob/io/image/jpeg.cpp",
           "bob/io/image/bmp.cpp",
+          "bob/io/image/pnmio.c",
           "bob/io/image/netpbm.cpp",
           "bob/io/image/main.cpp",
         ],