531 lines
12 KiB
C
531 lines
12 KiB
C
/* @(#) Copy an image.
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* @(#)
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* @(#) int
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* @(#) im_copy( in, out )
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* @(#) IMAGE *in, *out;
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* @(#)
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* @(#) Copy and set informational header fields
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* @(#)
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* @(#) int im_copy_set( in, out, type, xres, yres, xoff, yoff )
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* @(#) IMAGE *in, *out;
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* @(#) int type;
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* @(#) float xres, yres;
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* @(#) int xoff, yoff;
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* @(#)
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* @(#) copy, swapping byte order
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* @(#)
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* @(#) int
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* @(#) im_copy_swap( IMAGE *in, IMAGE *out )
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* @(#)
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* @(#) Returns 0 on success and -1 on error
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* @(#)
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*
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* Copyright: 1990, N. Dessipris, based on im_powtra()
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* Author: Nicos Dessipris
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* Written on: 02/05/1990
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* Modified on:
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* 23/4/93 J.Cupitt
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* - adapted to work with partial images
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* 30/6/93 JC
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* - adapted for partial v2
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* - and ANSI C
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* 7/7/93 JC
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* - now does IM_CODING_LABQ too
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* 22/2/95 JC
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* - new use of im_region_region()
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* 25/6/02 JC
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* - added im_copy_set()
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* - hint is IM_ANY
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* 5/9/02 JC
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* - added xoff/yoff to copy_set
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* 14/4/04 JC
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* - im_copy() now zeros Xoffset/Yoffset (since origin is the same as
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* input)
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* 26/5/04 JC
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* - added im_copy_swap()
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* 1/6/05
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* - added im_copy_morph()
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* 13/6/05
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* - oop, im_copy_set() was messed up
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* 29/9/06
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* - added im_copy_set_meta(), handy wrapper for nip2 to set meta fields
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* 2/11/06
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* - moved im__convert_saveable() here so it's always defined (was part
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* of JPEG write code)
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <vips/vips.h>
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif /*WITH_DMALLOC*/
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/* Copy a small area.
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*/
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static int
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copy_gen( REGION *or, REGION *ir )
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{
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Rect *r = &or->valid;
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/* Ask for input we need.
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*/
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if( im_prepare( ir, r ) )
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return( -1 );
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/* Attach output region to that.
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*/
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if( im_region_region( or, ir, r, r->left, r->top ) )
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return( -1 );
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return( 0 );
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}
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/* Copy image, changing header fields.
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*/
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static int
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im_copy_set_all( IMAGE *in, IMAGE *out,
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int Type, float Xres, float Yres, int Xoffset, int Yoffset,
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int Bands, int BandFmt, int Coding )
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{
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/* Check args.
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*/
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if( im_piocheck( in, out ) )
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return( -1 );
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if( in->Coding != IM_CODING_NONE && in->Coding != IM_CODING_LABQ ) {
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im_error( "im_copy", _( "in must be uncoded" ) );
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return( -1 );
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}
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if( Coding != IM_CODING_NONE && Coding != IM_CODING_LABQ ) {
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im_error( "im_copy", _( "Coding must be NONE or LABQ" ) );
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return( -1 );
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}
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if( BandFmt < 0 || BandFmt > IM_BANDFMT_DPCOMPLEX ) {
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im_error( "im_copy", _( "BandFmt must be in range [0,%d]" ),
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IM_BANDFMT_DPCOMPLEX );
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return( -1 );
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}
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/* Prepare output header.
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*/
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if( im_cp_desc( out, in ) )
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return( -1 );
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out->Type = Type;
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out->Xres = Xres;
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out->Yres = Yres;
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out->Xoffset = Xoffset;
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out->Yoffset = Yoffset;
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out->Bands = Bands;
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out->BandFmt = BandFmt;
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out->Coding = Coding;
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out->Bbits = im_bits_of_fmt( BandFmt );
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/* Sanity check: we (may) have changed bytes-per-pixel since we've
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* changed Bands and BandFmt ... bad!
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*/
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if( IM_IMAGE_SIZEOF_PEL( in ) != IM_IMAGE_SIZEOF_PEL( out ) ) {
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im_error( "im_copy", _( "sizeof( pixel ) has changed" ) );
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return( -1 );
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}
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/* Set demand hints.
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*/
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if( im_demand_hint( out, IM_THINSTRIP, in, NULL ) )
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return( -1 );
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/* Generate!
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*/
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if( im_generate( out, im_start_one, copy_gen, im_stop_one, in, NULL ) )
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return( -1 );
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return( 0 );
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}
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/* Copy image, changing informational header fields.
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*/
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int
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im_copy_set( IMAGE *in, IMAGE *out,
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int Type, float Xres, float Yres, int Xoffset, int Yoffset )
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{
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return( im_copy_set_all( in, out,
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Type, Xres, Yres, 0, 0,
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in->Bands, in->BandFmt, in->Coding ) );
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}
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/* Copy image, changing nothing.
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*/
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int
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im_copy( IMAGE *in, IMAGE *out )
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{
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return( im_copy_set( in, out,
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in->Type, in->Xres, in->Yres, 0, 0 ) );
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}
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/* Copy image, changing fields which affect pixel layout.
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*/
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int
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im_copy_morph( IMAGE *in, IMAGE *out,
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int Bands, int BandFmt, int Coding )
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{
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return( im_copy_set_all( in, out,
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in->Type, in->Xres, in->Yres, 0, 0,
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Bands, BandFmt, Coding ) );
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}
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int
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im_copy_set_meta( IMAGE *in, IMAGE *out, const char *field, GValue *value )
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{
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if( im_copy( in, out ) ||
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im_meta_set( out, field, value ) )
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return( 1 );
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return( 0 );
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}
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/* Swap pairs of bytes.
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*/
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static void
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im_copy_swap2_gen( PEL *in, PEL *out, int width, IMAGE *im )
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{
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int x;
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int sz = IM_IMAGE_SIZEOF_PEL( im ) * width; /* Bytes in buffer */
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for( x = 0; x < sz; x += 2 ) {
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out[x] = in[x + 1];
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out[x + 1] = in[x];
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}
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}
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/* Swap 4- of bytes.
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*/
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static void
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im_copy_swap4_gen( PEL *in, PEL *out, int width, IMAGE *im )
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{
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int x;
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int sz = IM_IMAGE_SIZEOF_PEL( im ) * width; /* Bytes in buffer */
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for( x = 0; x < sz; x += 4 ) {
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out[x] = in[x + 3];
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out[x + 1] = in[x + 2];
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out[x + 2] = in[x + 1];
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out[x + 3] = in[x];
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}
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}
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/* Swap 8- of bytes.
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*/
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static void
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im_copy_swap8_gen( PEL *in, PEL *out, int width, IMAGE *im )
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{
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int x;
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int sz = IM_IMAGE_SIZEOF_PEL( im ) * width; /* Bytes in buffer */
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for( x = 0; x < sz; x += 8 ) {
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out[x] = in[x + 7];
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out[x + 1] = in[x + 6];
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out[x + 2] = in[x + 5];
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out[x + 3] = in[x + 4];
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out[x + 4] = in[x + 3];
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out[x + 5] = in[x + 2];
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out[x + 6] = in[x + 1];
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out[x + 7] = in[x];
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}
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}
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/* Copy, swapping byte order between little and big endian.
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*/
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int
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im_copy_swap( IMAGE *in, IMAGE *out )
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{
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if( im_piocheck( in, out ) )
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return( -1 );
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if( in->Coding != IM_CODING_NONE ) {
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im_error( "im_copy_swap", _( "in must be uncoded" ) );
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return( -1 );
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}
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if( im_cp_desc( out, in ) )
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return( -1 );
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switch( in->BandFmt ) {
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case IM_BANDFMT_CHAR:
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case IM_BANDFMT_UCHAR:
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if( im_copy( in, out ) )
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return( -1 );
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break;
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case IM_BANDFMT_SHORT:
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case IM_BANDFMT_USHORT:
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if( im_wrapone( in, out,
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(im_wrapone_fn) im_copy_swap2_gen, in, NULL ) )
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return( -1 );
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break;
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case IM_BANDFMT_INT:
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case IM_BANDFMT_UINT:
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case IM_BANDFMT_FLOAT:
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case IM_BANDFMT_COMPLEX:
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if( im_wrapone( in, out,
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(im_wrapone_fn) im_copy_swap4_gen, in, NULL ) )
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return( -1 );
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break;
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case IM_BANDFMT_DOUBLE:
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case IM_BANDFMT_DPCOMPLEX:
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if( im_wrapone( in, out,
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(im_wrapone_fn) im_copy_swap8_gen, in, NULL ) )
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return( -1 );
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break;
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default:
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im_error( "im_copy_swap", _( "unsupported image type" ) );
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return( -1 );
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}
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return( 0 );
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}
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int
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im_copy_from( IMAGE *in, IMAGE *out, im_arch_type architecture )
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{
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switch( architecture ) {
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case IM_ARCH_NATIVE:
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return( im_copy( in, out ) );
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case IM_ARCH_BYTE_SWAPPED:
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return( im_copy_swap( in, out ) );
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case IM_ARCH_LSB_FIRST:
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return( im_amiMSBfirst() ?
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im_copy_swap( in, out ) : im_copy( in, out ) );
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case IM_ARCH_MSB_FIRST:
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return( im_amiMSBfirst() ?
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im_copy( in, out ) : im_copy_swap( in, out ) );
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default:
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im_error( "im_copy_from",
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_( "bad architecture: %d" ), architecture );
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return( -1 );
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}
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}
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/* Convert to 1 or 3 band uchar sRGB (or 2/4 band, if allow_alpha is set).
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* Need to im_close() the return IMAGE.
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*/
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IMAGE *
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im__convert_saveable( IMAGE *in, gboolean allow_alpha )
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{
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IMAGE *out;
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if( !(out = im_open( "im__convert_saveable", "p" )) )
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return( NULL );
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/* If this is a IM_CODING_LABQ, we can go straight to RGB.
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*/
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if( in->Coding == IM_CODING_LABQ ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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static void *table = NULL;
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/* Make sure fast LabQ2disp tables are built. 7 is sRGB.
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*/
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if( !table )
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table = im_LabQ2disp_build_table( NULL,
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im_col_displays( 7 ) );
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if( !t || im_LabQ2disp_table( in, t, table ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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/* Get the bands right. If we have >3, drop down to 3. If we have 2,
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* drop down to 1. If allow_alpha is on, we can also have 2/4 bands.
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*/
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if( in->Coding == IM_CODING_NONE ) {
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if( in->Bands == 2 && !allow_alpha ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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if( !t || im_extract_band( in, t, 0 ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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else if( in->Bands > 3 && !allow_alpha ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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if( !t ||
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im_extract_bands( in, t, 0, 3 ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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else if( in->Bands > 4 && allow_alpha ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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if( !t ||
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im_extract_bands( in, t, 0, 4 ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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}
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/* Interpret the Type field for colorimetric images.
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*/
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if( in->Bands == 3 && in->BandFmt == IM_BANDFMT_SHORT &&
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in->Type == IM_TYPE_LABS ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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if( !t || im_LabS2LabQ( in, t ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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if( in->Coding == IM_CODING_LABQ ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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if( !t || im_LabQ2Lab( in, t ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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if( in->Coding != IM_CODING_NONE ) {
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im_close( out );
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return( NULL );
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}
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if( in->Bands == 3 && in->Type == IM_TYPE_LCH ) {
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IMAGE *t[2];
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if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
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im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
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im_LCh2Lab( t[0], t[1] ) ) {
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im_close( out );
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return( NULL );
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}
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in = t[1];
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}
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if( in->Bands == 3 && in->Type == IM_TYPE_YXY ) {
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IMAGE *t[2];
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if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
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im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
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im_Yxy2XYZ( t[0], t[1] ) ) {
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im_close( out );
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return( NULL );
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}
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in = t[1];
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}
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if( in->Bands == 3 && in->Type == IM_TYPE_UCS ) {
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IMAGE *t[2];
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if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
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im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
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im_UCS2XYZ( t[0], t[1] ) ) {
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im_close( out );
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return( NULL );
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}
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in = t[1];
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}
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if( in->Bands == 3 && in->Type == IM_TYPE_LAB ) {
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IMAGE *t[2];
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if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
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im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
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im_Lab2XYZ( t[0], t[1] ) ) {
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im_close( out );
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return( NULL );
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}
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in = t[1];
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}
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if( in->Bands == 3 && in->Type == IM_TYPE_XYZ ) {
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IMAGE *t[2];
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if( im_open_local_array( out, t, 2, "conv-1", "p" ) ||
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im_clip2fmt( in, t[0], IM_BANDFMT_FLOAT ) ||
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im_XYZ2disp( t[0], t[1], im_col_displays( 7 ) ) ) {
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im_close( out );
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return( NULL );
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}
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in = t[1];
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}
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/* Clip to uchar if not there already.
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*/
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if( in->BandFmt != IM_BANDFMT_UCHAR ) {
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IMAGE *t = im_open_local( out, "conv:1", "p" );
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if( !t || im_clip( in, t ) ) {
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im_close( out );
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return( NULL );
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}
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in = t;
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}
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if( im_copy( in, out ) ) {
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im_close( out );
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return( NULL );
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}
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return( out );
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}
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