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author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-08-19 03:12:28 +0000 |
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committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-08-19 03:12:28 +0000 |
commit | 1fd361a1ea06e44286c213ca1f814f49306fdc43 (patch) | |
tree | 64c8c96cf54d8718847339a403e5e67b922e8c3f /converter/ppm/neotoppm.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/neotoppm.c')
-rw-r--r-- | converter/ppm/neotoppm.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/converter/ppm/neotoppm.c b/converter/ppm/neotoppm.c new file mode 100644 index 00000000..d8cf2918 --- /dev/null +++ b/converter/ppm/neotoppm.c @@ -0,0 +1,104 @@ +/* neotoppm.c - read a Neochrome NEO file and produce a portable pixmap +** +** Copyright (C) 2001 by Teemu Hukkanen <tjhukkan@iki.fi> +** Based on pi1toppm 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( int argc, char * argv[] ) { + FILE* ifp; + pixel pal[16]; /* Degas palette */ + pixel* pixelrow; + int row; + + ppm_init( &argc, argv ); + + /* Check args. */ + if ( argc > 2 ) + pm_usage( "[neofile]" ); + + if ( argc == 2 ) + ifp = pm_openr( argv[1] ); + else + ifp = stdin; + + /* Check header */ + { + /* Flag */ + short j; + pm_readbigshort (ifp, &j); + if ( j != 0 ) + pm_error( "not a NEO file" ); + } + { + /* Check resolution word */ + short j; + pm_readbigshort (ifp, &j); + if ( j != 0 ) + pm_error( "not a NEO file" ); + } + { + int i; + /* Read the palette. */ + for ( i = 0; i < 16; ++i ) { + short j; + + pm_readbigshort (ifp, &j); + PPM_ASSIGN( pal[i], + ( j & 0x700 ) >> 8, + ( j & 0x070 ) >> 4, + ( j & 0x007 ) ); + } + } + + /* Skip rest of header */ + fseek(ifp, 128, SEEK_SET); + + { + /* Read the screen data */ + int i; + for ( i = 0; i < ROWS*COLS/4; ++i ) + pm_readbigshort( ifp, &screen[i] ); + } + pm_close( ifp ); + + /* Ok, get set for writing PPM. */ + ppm_writeppminit( stdout, COLS, ROWS, MAXVAL, 0 ); + pixelrow = ppm_allocrow( COLS ); + + /* Now do the conversion. */ + for ( row = 0; row < ROWS; ++row ) { + int col; + for ( col = 0; col < COLS; ++col ) { + 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); + pixelrow[col] = pal[c]; + } + ppm_writeppmrow( stdout, pixelrow, COLS, MAXVAL, 0 ); + } + + pm_close( stdout ); + + exit( 0 ); +} |