| /* im_gbandjoin -- bandwise join of a set of images |
| * |
| * Copyright: 1991, N. Dessipris, modification of im_bandjoin() |
| * |
| * Author: N. Dessipris |
| * Written on: 17/04/1991 |
| * Modified on : |
| * 16/3/94 JC |
| * - rewritten for partials |
| * - now in ANSI C |
| * - now works for any number of input images, except zero |
| * 7/10/94 JC |
| * - new IM_NEW() |
| * 16/4/07 |
| * - fall back to im_copy() for 1 input image |
| * 17/1/09 |
| * - cleanups |
| * - gtk-doc |
| * - im_bandjoin() just calls this |
| * - works for RAD coding too |
| * 27/1/10 |
| * - formatalike inputs |
| */ |
| |
| /* |
| |
| 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 <stdlib.h> |
| |
| #include <vips/vips.h> |
| #include <vips/internal.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| /* Struct we carry stuff around in. |
| */ |
| typedef struct joins { |
| int nim; /* Number of input images */ |
| IMAGE **in; /* Array of input images, NULL-terminated */ |
| int *is; /* An int for SIZEOF_PEL() for each image */ |
| } Join; |
| |
| /* Make a Join struct. |
| */ |
| static Join * |
| join_new( IMAGE *out, IMAGE **in, int nim ) |
| { |
| Join *join; |
| int i; |
| |
| if( !(join = IM_NEW( out, Join )) ) |
| return( NULL ); |
| join->nim = nim; |
| if( !(join->in = IM_ARRAY( out, nim + 1, IMAGE * )) || |
| !(join->is = IM_ARRAY( out, nim, int )) ) |
| return( NULL ); |
| |
| /* Cast inputs up to a common format. |
| */ |
| if( im_open_local_array( out, join->in, nim, "im_gbandjoin", "p" ) || |
| im__formatalike_vec( in, join->in, nim ) ) |
| return( NULL ); |
| |
| for( i = 0; i < nim; i++ ) |
| join->is[i] = IM_IMAGE_SIZEOF_PEL( join->in[i] ); |
| |
| /* Remember to NULL-terminate. We pass ->in[] to |
| * im_demand_hint_array() and friends later. |
| */ |
| join->in[nim] = NULL; |
| |
| return( join ); |
| } |
| |
| /* Perform join. |
| */ |
| static int |
| join_bands( REGION *or, void *seq, void *a, void *b ) |
| { |
| REGION **ir = (REGION **) seq; |
| Join *join = (Join *) b; |
| Rect *r = &or->valid; |
| const int ps = IM_IMAGE_SIZEOF_PEL( or->im ); |
| |
| int x, y, z, i; |
| |
| for( i = 0; i < join->nim; i++ ) |
| if( im_prepare( ir[i], r ) ) |
| return( -1 ); |
| |
| /* Loop over output! |
| */ |
| for( y = 0; y < r->height; y++ ) { |
| PEL *qb; |
| |
| qb = (PEL *) IM_REGION_ADDR( or, r->left, r->top + y ); |
| |
| /* Loop for each input image. Scattered write is faster than |
| * scattered read. |
| */ |
| for( i = 0; i < join->nim; i++ ) { |
| int k = join->is[i]; |
| |
| PEL *p; |
| PEL *q; |
| |
| p = (PEL *) IM_REGION_ADDR( ir[i], |
| r->left, r->top + y ); |
| q = qb; |
| |
| for( x = 0; x < r->width; x++ ) { |
| for( z = 0; z < k; z++ ) |
| q[z] = p[z]; |
| |
| p += z; |
| q += ps; |
| } |
| |
| qb += k; |
| } |
| } |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_gbandjoin: |
| * @in: vector of input images |
| * @out: output image |
| * @nim: number of input images |
| * |
| * Join a set of images together, bandwise. |
| * If the images |
| * have n and m bands, then the output image will have n + m |
| * bands, with the first n coming from the first image and the last m |
| * from the second. |
| * |
| * The images must be the same size. |
| * The input images are cast up to the smallest common type (see table |
| * Smallest common format in |
| * <link linkend="VIPS-arithmetic">arithmetic</link>). |
| * |
| * See also: im_bandjoin(), im_insert(). |
| * |
| * Returns: 0 on success, -1 on error |
| */ |
| int |
| im_gbandjoin( IMAGE **in, IMAGE *out, int nim ) |
| { |
| int i; |
| Join *join; |
| |
| /* Check it out! |
| */ |
| if( nim < 1 ) { |
| im_error( "im_gbandjoin", "%s", _( "zero input images!" ) ); |
| return( -1 ); |
| } |
| else if( nim == 1 ) |
| return( im_copy( in[0], out ) ); |
| |
| /* Check our args. |
| */ |
| if( im_poutcheck( out ) || |
| im_check_coding_known( "im_gbandjoin", in[0] ) ) |
| return( -1 ); |
| for( i = 0; i < nim; i++ ) |
| if( im_pincheck( in[i] ) || |
| im_check_size_same( "im_gbandjoin", in[i], in[0] ) || |
| im_check_coding_same( "im_gbandjoin", in[i], in[0] ) ) |
| return( -1 ); |
| |
| /* Build a data area. |
| */ |
| if( !(join = join_new( out, in, nim )) ) |
| return( -1 ); |
| |
| /* Prepare the output header. |
| */ |
| if( im_cp_desc_array( out, join->in ) ) |
| return( -1 ); |
| out->Bands = 0; |
| for( i = 0; i < nim; i++ ) |
| out->Bands += join->in[i]->Bands; |
| if( im_demand_hint_array( out, IM_THINSTRIP, join->in ) ) |
| return( -1 ); |
| |
| if( im_generate( out, |
| im_start_many, join_bands, im_stop_many, join->in, join ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_bandjoin: |
| * @in1: first input image |
| * @in2: second input image |
| * @out: output image |
| * |
| * Join two images bandwise. |
| * If the two images |
| * have n and m bands respectively, then the output image will have n + m |
| * bands, with the first n coming from the first image and the last m |
| * from the second. |
| * |
| * The images must be the same size. |
| * The two input images are cast up to the smallest common type (see table |
| * Smallest common format in |
| * <link linkend="VIPS-arithmetic">arithmetic</link>). |
| * |
| * See also: im_gbandjoin(), im_insert(). |
| * |
| * Returns: 0 on success, -1 on error |
| */ |
| int |
| im_bandjoin( IMAGE *in1, IMAGE *in2, IMAGE *out ) |
| { |
| IMAGE *t[2]; |
| |
| t[0] = in1; |
| t[1] = in2; |
| |
| return( im_gbandjoin( t, out, 2 ) ); |
| } |