1 files changed, 88 insertions, 0 deletions
diff --git a/imageto/input-pbm.c b/imageto/input-pbm.c
new file mode 100644
index 0000000..9fe47ba
--- /dev/null
+++ b/imageto/input-pbm.c
@@ -0,0 +1,88 @@
+/* input-pbm.c: read PBM files.
+
+Copyright (C) 1990, 1991, 19 19ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "config.h"
+
+#include "file-input.h"
+
+#include "main.h"
+#include "image-header.h"
+#include "input-pbm.h"
+
+#include "pbmplus.h"
+#include "pbm.h"
+
+
+/* Where the input comes from.  */
+static FILE *pbm_input_file;
+static string pbm_input_filename;
+
+
+
+/* Only one file can be open at a time.  We do no path searching.  If
+   FILENAME can't be opened, we quit.  */
+
+void
+pbm_open_input_file (string filename)
+{
+  assert (pbm_input_file == NULL);
+  
+  pbm_input_file = xfopen (filename, "r");
+  pbm_input_filename = filename;
+}
+
+
+/* Close the input file.  If it hasn't been opened, we quit.  */
+
+void
+pbm_close_input_file ()
+{
+  assert (pbm_input_file != NULL);
+  
+  xfclose (pbm_input_file, pbm_input_filename);
+  pbm_input_file = NULL;
+}
+
+
+
+/* Read the header information.
+   Modifies the global image_header in main.c.  */
+
+void
+pbm_get_header ()
+{
+  int width, height, format;
+
+  pbm_readpbminit (pbm_input_file, &width, &height, &format);
+  image_header.width = (two_bytes) width;
+  image_header.height = (two_bytes) height;
+  image_header.depth = 0;
+  image_header.format = (two_bytes) format;
+}
+
+
+
+/* Read one scanline of the image.  */
+
+boolean
+pbm_get_scanline (one_byte *line_in_bits)
+{
+  int c = getc (pbm_input_file);
+  
+  if (c == EOF)
+    return false;
+    
+  ungetc (c, pbm_input_file);
+  pbm_readpbmrow (pbm_input_file, line_in_bits, image_header.width, 
+		  image_header.format);
+
+  print_scanline (line_in_bits, image_header.width);
+  return true;
+}