1 files changed, 62 insertions, 0 deletions
diff --git a/lib/tests/pnm.h b/lib/tests/pnm.h
new file mode 100644
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--- /dev/null
+++ b/lib/tests/pnm.h
@@ -0,0 +1,62 @@
+/*  pnm.c -- utility functions for testing purposes
+ *  Copyright (C) 2019 SEIKO EPSON Corporation
+ *
+ *  License: EPSON END USER SOFTWARE LICENSE
+ *  Author : SEIKO EPSON Corporation
+ *
+ *  This file is part of Image Scan! for Linux.
+ *  It is distributed under the terms of the EPSON END USER SOFTWARE LICENSE.
+ *
+ *  You should have received a verbatim copy of the EPSON END USER SOFTWARE
+ *  LICENSE along with the software.
+ */
+
+
+#ifndef pnm_h
+#define pnm_h
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+  typedef struct {
+    void *buffer;               /*!< image data */
+    size_t size;                /*!< number of bytes allocated for buffer */
+    int format;                 /*!< zero for grayscale, non-zero for RGB */
+    int32_t bytes_per_line;
+    int32_t pixels_per_line;
+    int32_t lines;
+    int32_t depth;
+  } pnm;
+
+  /*! \brief Reads a PNM image from \a file
+   *
+   *  Comments in the image file are allowed only between the first
+   *  and second non-comment lines.  That is, only a single block of
+   *  consecutive comment lines after the first line is supported.
+   *
+   *  Memory to hold the image data is acquired using malloc() and the
+   *  caller is responsible for releasing this resource.
+   *
+   *  Passing the \c NULL pointer for \a file will read from \c stdin.
+   */
+  pnm * read_pnm (const char *file);
+
+  /*! \brief Outputs a PNM \a image to \a file
+   *
+   *  Files produced are reusable for input.
+   *
+   *  Passing the \c NULL pointer for \a file will result in output on
+   *  \c stdout.
+   */
+  void write_pnm (const char *file, const pnm *image,
+                  const char *comment);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif  /* defined (pnm_h) */