242 lines
7.2 KiB
C
242 lines
7.2 KiB
C
/* @(#) Generalised addition of two vasari images.
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* @(#)Inputs, outputs are neither float nor double
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* @(#) Result at each point is a*in1 + b*in2 + c
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* @(#) Result depends on inputs, rounding is carried out;
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* @(#) Function im_gaddim() assumes that the both input files
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* @(#) are either memory mapped or in a buffer.
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* @(#) Images must have the same no of bands and must not be complex
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* @(#) No check for overflow is done;
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* @(#)
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* @(#) int im_gaddim(a, in1, b, in2, c, out)
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* @(#) double a, b, c;
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* @(#) IMAGE *in1, *in2, *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.
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*
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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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*/
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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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/* This function works on either mmaped files or on images in buffer
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*/
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/* uchar char ushort short uint int */
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static int array[6][6] = {
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/* uchar */ { 2, 3, 2, 3, 4, 5 },
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/* char */ { 3, 3, 3, 3, 5, 5 },
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/* ushort */ { 2, 3, 2, 3, 4, 5 },
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/* short */ { 3, 3, 3, 3, 5, 5 },
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/* uint */ { 4, 5, 4, 5, 4, 5 },
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/* int */ { 5, 5, 5, 5, 5, 5 }
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};
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#define select_tmp2_for_out_int(OUT) \
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case IM_BANDFMT_UCHAR: select_tmp1_for_out_int(unsigned char, OUT); break; \
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case IM_BANDFMT_CHAR: select_tmp1_for_out_int(signed char, OUT); break; \
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case IM_BANDFMT_USHORT: select_tmp1_for_out_int(unsigned short, OUT); break; \
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case IM_BANDFMT_SHORT: select_tmp1_for_out_int(signed short, OUT); break; \
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case IM_BANDFMT_UINT: select_tmp1_for_out_int(unsigned int, OUT); break; \
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case IM_BANDFMT_INT: select_tmp1_for_out_int(signed int, OUT); break; \
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\
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default: \
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im_error("im_gaddim","Wrong tmp2 format(1)"); \
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free( line); \
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return(-1);
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#define select_tmp1_for_out_int(IN2, OUT) \
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switch(tmp1->BandFmt) { \
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case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break; \
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case IM_BANDFMT_INT: loop(int, IN2, OUT); break; \
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default: im_error("im_gaddim","Wrong tmp2 format(2)");\
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free( line);\
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return(-1); \
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}
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#define select_tmp2_for_out_short(OUT) \
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case IM_BANDFMT_UCHAR: select_tmp1_for_out_short(unsigned char, OUT); break; \
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case IM_BANDFMT_CHAR: select_tmp1_for_out_short(signed char, OUT); break; \
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case IM_BANDFMT_USHORT: select_tmp1_for_out_short(unsigned short, OUT); break; \
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case IM_BANDFMT_SHORT: select_tmp1_for_out_short(signed short, OUT); break;
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#define select_tmp1_for_out_short(IN2, OUT) \
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switch(tmp1->BandFmt) { \
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case IM_BANDFMT_UCHAR: loop(unsigned char, IN2, OUT); break; \
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case IM_BANDFMT_CHAR: loop(signed char, IN2, OUT); break; \
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case IM_BANDFMT_USHORT: loop(unsigned short, IN2, OUT); break; \
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case IM_BANDFMT_SHORT: loop(signed short, IN2, OUT); break; \
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default: im_error("im_gaddim","Wrong image1 format(4)");\
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free( line);\
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return(-1); \
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}
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int im_gaddim(a, in1, b, in2, c, out)
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IMAGE *in1, *in2, *out;
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double a, b, c;
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{
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static int bb[] = { IM_BBITS_BYTE, IM_BBITS_BYTE, IM_BBITS_SHORT,
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IM_BBITS_SHORT, IM_BBITS_INT, IM_BBITS_INT };
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static int fmt[] = { IM_BANDFMT_UCHAR, IM_BANDFMT_CHAR,
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IM_BANDFMT_USHORT, IM_BANDFMT_SHORT,
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IM_BANDFMT_UINT, IM_BANDFMT_INT };
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int y, x;
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int first, second, result;
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IMAGE *tmp1, *tmp2;
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PEL *line;
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int os; /* size of a line of output image */
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/* fd, data filename must have been set before the function is called
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* Check whether they are set properly */
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if ((im_iocheck(in1, out) == -1) || (im_iocheck(in2, out) == -1))
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{
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return(-1);
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}
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/* Checks the arguments entered in in and prepares out */
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if ( (in1->Xsize != in2->Xsize) || (in1->Ysize != in2->Ysize) ||
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(in1->Bands != in2->Bands) || (in1->Coding != in2->Coding) )
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{ im_error("im_gaddim"," Input images differ"); return(-1); }
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if (in1->Coding != IM_CODING_NONE)
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{ im_error("im_gaddim"," images must be uncoded"); return(-1);}
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switch(in1->BandFmt) {
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case IM_BANDFMT_UCHAR: first = 0; break;
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case IM_BANDFMT_CHAR: first = 1; break;
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case IM_BANDFMT_USHORT: first = 2; break;
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case IM_BANDFMT_SHORT: first = 3; break;
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case IM_BANDFMT_UINT: first = 4; break;
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case IM_BANDFMT_INT: first = 5; break;
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default: im_error("im_gaddim"," Unable to accept image1");
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return(-1);
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}
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switch(in2->BandFmt) {
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case IM_BANDFMT_UCHAR: second = 0; break;
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case IM_BANDFMT_CHAR: second = 1; break;
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case IM_BANDFMT_USHORT: second = 2; break;
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case IM_BANDFMT_SHORT: second = 3; break;
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case IM_BANDFMT_UINT: second = 4; break;
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case IM_BANDFMT_INT: second = 5; break;
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default: im_error("im_gaddim"," Unable to accept image2");
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return(-1);
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}
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/* Define the output */
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result = array[first][second];
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/* Prepare the output header */
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if ( im_cp_desc(out, in1) == -1)
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{ im_error("im_gaddim"," im_cp_desc failed"); return(-1); }
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out->Bbits = bb[result];
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out->BandFmt = fmt[result];
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if( im_setupout(out) == -1)
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{ im_error("im_gaddim"," im_setupout failed"); return(-1); }
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/* Order in1 and in2 */
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if ( first >= second )
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{ tmp1 = in1; tmp2 = in2; }
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else
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{ tmp1 = in2; tmp2 = in1; }
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/* Define what we do for each band element type. */
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#define loop(IN1, IN2, OUT) \
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{ IN1 *input1 = (IN1 *) tmp1->data; \
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IN2 *input2 = (IN2 *) tmp2->data; \
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\
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for (y=0; y <out->Ysize; y++) {\
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OUT *cpline = (OUT*)line; \
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for (x=0; x<os; x++)\
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*cpline++ = (OUT) \
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(a*(*input1++)+b*(*input2++)+c +0.5);\
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if (im_writeline(y, out, line) == -1) {\
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free( line);\
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return ( -1 );\
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}\
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}\
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}
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os = out->Xsize * out->Bands;
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line = (PEL *) calloc ( (unsigned)os, sizeof(double) );
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if (line == NULL)
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{
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im_error("im_gaddim"," Unable to calloc");
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return(-1);
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}
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switch (out->BandFmt) {
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case IM_BANDFMT_INT:
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switch (tmp2->BandFmt) {
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select_tmp2_for_out_int(int);
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}
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break;
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case IM_BANDFMT_UINT:
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switch (tmp2->BandFmt) {
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select_tmp2_for_out_int(unsigned int);
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}
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break;
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case IM_BANDFMT_SHORT:
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switch (tmp2->BandFmt) {
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select_tmp2_for_out_short(short);
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}
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break;
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case IM_BANDFMT_USHORT:
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switch (tmp2->BandFmt) {
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select_tmp2_for_out_short(unsigned short);
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}
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break;
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default:
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im_error("im_gaddim"," Impossible output state");
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free( line);
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return(-1);
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}
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free( line);
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return(0);
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}
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