libvips/contrib/vips2dj/vips2ah.c

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2007-08-29 18:23:50 +02:00
/* Output IM_CODING_LABQ as band-separated ASCIIHEX for PostScript
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <vips/vips.h>
#include <vips/region.h>
static int
writeimage( REGION *ir, FILE *out )
{
IMAGE *im = ir->im;
int x, y, z;
int l = 0;
PEL *p;
Rect area;
/* Set up input area.
*/
area.left = 0;
area.top = 0;
area.width = im->Xsize;
area.height = 1;
/* Write a byte.
*/
#define PUT( C ) {\
int c1 = (C);\
\
if( putc( c1, out ) == EOF ) {\
im_errormsg( "vips2hp2500cp: write error - disc full?" );\
return( -1 );\
}\
}
/* Write a hex character.
*/
#define writehexc( C ) {\
int c = (C);\
\
if( c < 10 ) {\
PUT( c + '0' );\
}\
else\
PUT( (c - 10) + 'A' );\
}
/* Write a hex byte.
*/
#define writehexb( B ) { \
int b = (B);\
\
writehexc( (b >> 4 ) & 0xf );\
writehexc( b & 0xf );\
}
/* Output a hex byte, linefeed on eol.
*/
#define writewrap( B ) { \
writehexb( B ); \
if( l++ > 30 ) { \
PUT( '\n' ); \
l = 0; \
} \
}
/* Loop for each scan-line.
*/
for( y = 0; y < im->Ysize; y++ ) {
/* Ask for this scan-line.
*/
area.top = y;
if( im_prepare( ir, &area ) )
return( -1 );
p = (PEL *) IM_REGION_ADDR( ir, 0, y );
if( im->Coding == IM_CODING_LABQ ) {
/* Do L* ... easy.
*/
for( x = 0; x < im->Xsize; x++ )
writewrap( p[x*4] );
/* a* and b* ... more difficult. Photoshop uses
* bizzare coding for a/b.
*/
for( z = 1; z < 3; z++ ) {
for( x = 0; x < im->Xsize; x++ ) {
int i = (signed char) p[x*4 + z];
writewrap( i + 128 );
}
}
}
else if( im->Bands == 4 ) {
for( z = 0; z < 4; z++ )
for( x = 0; x < im->Xsize; x++ ) {
int v = p[x*4 + z];
writewrap( v );
}
/* Extra channel?? Just send zeros.
*/
for( x = 0; x < im->Xsize; x++ )
writewrap( 0xff );
}
else if( im->Bands == 1 ) {
for( x = 0; x < im->Xsize; x++ ) {
int v = p[x];
writewrap( v );
}
}
}
PUT( '\n' );
return( 0 );
}
/* Start here!
*/
int
vips2asciihex( IMAGE *in, FILE *out )
{
REGION *ir;
if( im_pincheck( in ) )
return( -1 );
if( !(ir = im_region_create( in )) )
return( -1 );
if( writeimage( ir, out ) ) {
im_region_free( ir );
return( -1 );
}
im_region_free( ir );
return( 0 );
}