diff options
author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-08-19 03:12:28 +0000 |
---|---|---|
committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-08-19 03:12:28 +0000 |
commit | 1fd361a1ea06e44286c213ca1f814f49306fdc43 (patch) | |
tree | 64c8c96cf54d8718847339a403e5e67b922e8c3f /converter/ppm/pi1toppm.c | |
download | netpbm-mirror-1fd361a1ea06e44286c213ca1f814f49306fdc43.tar.gz netpbm-mirror-1fd361a1ea06e44286c213ca1f814f49306fdc43.tar.xz netpbm-mirror-1fd361a1ea06e44286c213ca1f814f49306fdc43.zip |
Create Subversion repository
git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'converter/ppm/pi1toppm.c')
-rw-r--r-- | converter/ppm/pi1toppm.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/converter/ppm/pi1toppm.c b/converter/ppm/pi1toppm.c new file mode 100644 index 00000000..69b99863 --- /dev/null +++ b/converter/ppm/pi1toppm.c @@ -0,0 +1,92 @@ +/* pi1toppm.c - read a Degas PI1 file and produce a portable pixmap +** +** Copyright (C) 1991 by Steve Belczyk (seb3@gte.com) and 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" + +#define ROWS 200 +#define COLS 320 +#define MAXVAL 7 + +static short screen[ROWS*COLS/4]; /* simulates the Atari's video RAM */ + +int +main( argc, argv ) + int argc; + char* argv[]; + { + FILE* ifp; + pixel pal[16]; /* Degas palette */ + short i; + short j; + pixel* pixelrow; + register pixel* pP; + int row, col; + + + ppm_init( &argc, argv ); + + /* Check args. */ + if ( argc > 2 ) + pm_usage( "[pi1file]" ); + + if ( argc == 2 ) + ifp = pm_openr( argv[1] ); + else + ifp = stdin; + + /* Check resolution word */ + (void) pm_readbigshort (ifp, &j); + if ( j != 0 ) + pm_error( "not a PI1 file" ); + + /* Read the palette. */ + for ( i = 0; i < 16; ++i ) + { + (void) pm_readbigshort (ifp, &j); + PPM_ASSIGN( pal[i], + ( j & 0x700 ) >> 8, + ( j & 0x070 ) >> 4, + ( j & 0x007 ) ); + } + + /* Read the screen data */ + for ( i = 0; i < ROWS*COLS/4; ++i ) + (void) pm_readbigshort( ifp, &screen[i] ); + + pm_close( ifp ); + + /* Ok, get set for writing PPM. */ + ppm_writeppminit( stdout, COLS, ROWS, (pixval) MAXVAL, 0 ); + pixelrow = ppm_allocrow( COLS ); + + /* Now do the conversion. */ + for ( row = 0; row < ROWS; ++row ) + { + for ( col = 0, pP = pixelrow; col < COLS; ++col, ++pP ) + { + register int c, ind, b, plane; + + ind = 80 * row + ( ( col >> 4 ) << 2 ); + b = 0x8000 >> ( col & 0xf ); + c = 0; + for ( plane = 0; plane < 4; ++plane ) + if ( b & screen[ind+plane] ) + c |= (1 << plane); + *pP = pal[c]; + } + ppm_writeppmrow( stdout, pixelrow, COLS, (pixval) MAXVAL, 0 ); + } + + pm_close( stdout ); + + exit( 0 ); + } |