1 files changed, 68 insertions, 0 deletions
diff --git a/converter/ppm/mtvtoppm.c b/converter/ppm/mtvtoppm.c
new file mode 100644
index 00000000..e8558632
--- /dev/null
+++ b/converter/ppm/mtvtoppm.c
@@ -0,0 +1,68 @@
+/* mtvtoppm.c - read an MTV ray-tracer output file and produce a portable pixmap
+**
+** Copyright (C) 1989 by Jef Poskanzer.
+**
+** Permission to use, copy, modify, and distribute this software and its
+** documentation for any purpose and without fee is hereby granted, provided
+** that the above copyright notice appear in all copies and that both that
+** copyright notice and this permission notice appear in supporting
+** documentation.  This software is provided "as is" without express or
+** implied warranty.
+*/
+
+#include "ppm.h"
+
+int
+main( argc, argv )
+    int argc;
+    char* argv[];
+    {
+    FILE* ifp;
+    pixel* pixelrow;
+    register pixel* pP;
+    int rows, cols, row, col;
+    pixval maxval;
+#define MAXLINE 500
+    char line[MAXLINE];
+    unsigned char buf[3];
+
+
+    ppm_init( &argc, argv );
+
+    if ( argc > 2 )
+	pm_usage( "[mtvfile]" );
+
+    if ( argc == 2 )
+	ifp = pm_openr( argv[1] );
+    else
+	ifp = stdin;
+
+    /* Read in the MTV file.  First the header. */
+    if ( fgets( line, MAXLINE, ifp ) == NULL )
+	pm_error( "unable to read MTV file header" );
+    if ( sscanf( line, "%d%d", &cols, &rows ) != 2 )
+	pm_error( "unable to parse MTV file header" );
+
+    if ( cols <= 0 || rows <= 0 )
+	pm_error( "invalid size: %d %d", cols, rows );
+    maxval = 255;
+
+    ppm_writeppminit( stdout, cols, rows, maxval, 0 );
+    pixelrow = ppm_allocrow( cols );
+
+    for ( row = 0; row < rows; row++ )
+	{
+	for ( col = 0, pP = pixelrow; col < cols; col++, pP++ )
+	    {
+	    if ( fread( buf, sizeof(buf), 1, ifp ) != 1 )
+		pm_error( "EOF / read error" );
+	    PPM_ASSIGN( *pP, buf[0], buf[1], buf[2] );
+	    }
+	ppm_writeppmrow( stdout, pixelrow, cols, maxval, 0 );
+	}
+
+    pm_close( ifp );
+    pm_close( stdout );
+
+    exit( 0 );
+    }