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/*
* $Id: loadtiff-code.h,v 4.2 2004/06/21 08:18:29 hut66au Exp $
*
* Imview, the portable image analysis application
* http://www.cmis.csiro.au/Hugues.Talbot/imview
* ----------------------------------------------------------
*
* Imview is an attempt to provide an image display application
* suitable for professional image analysis. It was started in
* 1997 and is mostly the result of the efforts of Hugues Talbot,
* Image Analysis Project, CSIRO Mathematical and Information
* Sciences, with help from others (see the CREDITS files for
* more information)
*
* Imview is Copyrighted (C) 1997-2001 by Hugues Talbot and was
* supported in parts by the Australian Commonwealth Science and
* Industry Research Organisation. Please see the COPYRIGHT file
* for full details. Imview also includes the contributions of
* many others. Please see the CREDITS file for full details.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
* */
/*------------------------------------------------------------------------
*
* Decodes the TIFF format.
* Should be able to read any data format. Will deal with non-char
* data
*
* Based on `loadtiff.c' by the same author
*
* Hugues Talbot 10 Jan 1998
*
*-----------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <tiffio.h>
#include <stdarg.h>
#include "loadtiff.h"
/* useful function for decoding TIFF image type */
int getTiffType(int pi, /* photometric interpretation */
int sf, /* sample format */
int spp, /* samples per pixel */
int bps, /* bits per sample */
pixtype *pixeltype,
imgtype *imagetype)
{
int tys[][3] = {
{IM_BINARY,IM_BINARY, -1,},
{IM_UINT1, IM_UINT1, -1,}, /* we _never_ handle signed char */
{IM_INT2, IM_UINT2, -1,},
{IM_INT4, IM_UINT4, IM_FLOAT,},
{IM_INT8, IM_UINT8, IM_DOUBLE,}
};
int idx1, idx2;
*imagetype = IM_UNSPEC; /*-- default imagetype is 'unspecified'--*/
if(spp == 3 && bps == 8 && pi == 2) {
*pixeltype = IM_UINT1;
*imagetype = IM_RGB; /*--assume RGB--*/
return 0;
}
switch(bps) {
case 1: idx1 = 0; break;
case 4: idx1 = 1; break;
case 8: idx1 = 1; break;
case 12:idx1 = 2; break;
case 16:idx1 = 2; break;
case 32:idx1 = 3; break;
case 64:idx1 = 4; break;
default:
*imagetype = IM_ERROR;
return 1; /* error unknown image type */
}
if(sf == 1 || sf == 4)
idx2 = 1;
else if(sf == 2)
idx2 = 0;
else if(sf == 3)
idx2 = 2;
else
{
*imagetype = IM_ERROR;
return 1; /* error unknown image type */
}
*pixeltype = (pixtype)(tys[idx1][idx2]);
if(*pixeltype == -1)
{
*imagetype = IM_ERROR;
return 1; /* error unknown image type */
}
else
{
*imagetype = IM_SPECTRUM; /* default to single component image */
return 0;
}
}
/* this is the unalterated function from the LIAR. */
/* Hugues Talbot 10 Jan 1998 */
int load_tiff(const char *fname, /* file name */
int imageindex, /* image index in the file to load */
int start[3], /* dimensions start */
int end[3], /* dimensions end */
int *pi, /* photometric interpretation */
int *sf, /* storage format */
int *spp, /* samples per pixel */
int *bps, /* bits per pixel */
unsigned short *colourmap[3], /* RGB lut */
long *ncolours, /* nb of colours in the lut */
void **inbuffp) /* data buffer for this image */
{
/** Loads a TIFF image of any type.
RETURN VALUE: int
DESCRIPTION: Loads a TIFF image. Always allocate a 2D buffer.
HISTORY: by Hugues Talbot and Ed Breen 9 Dec 1996
TESTS:
REFERENCES:
KEYWORDS: input/output
**/
TIFF *tif;
void **buffp;
uint8 *bufIn, *cp, *cpi;
uint16 *sp, *spi, photometric, sampleformat;
uint16 *red_cm, *green_cm, *blue_cm;
uint32 *lp, *lpi;
double *dp, *dpi;
tsize_t tf_bytesperrow;
uint16 config;
uint32 imWidth, imLength;
uint16 samplesperpixel;
uint16 bitspersample;
float imXposition, imYposition;
unsigned int i, j, jj, k, l;
int n, range, nbcols;
/* first open the TIFF file */
if ((tif = TIFFOpen(fname, "r")) == NULL) {
LIARerror("Cannot open file %s", fname);
return(1);
}
/* then start by reading the correct subimage */
if (!TIFFSetDirectory(tif, imageindex)) {
/* this is quite legitimate to try to read beyond the last index */
TIFFClose(tif);
return(2);
}
/* get information on the image */
TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, &bitspersample);
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL,
&samplesperpixel);
tf_bytesperrow = TIFFScanlineSize(tif);
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &imWidth);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &imLength);
/* although as we use it, the X and Y positions are always
integer, they are stored as float in the Tiff Lib */
if (!TIFFGetField(tif, TIFFTAG_XPOSITION, &imXposition))
imXposition = 0.0;
if (!TIFFGetField(tif, TIFFTAG_YPOSITION, &imYposition))
imYposition = 0.0;
if (!TIFFGetField(tif, TIFFTAG_SAMPLEFORMAT, &sampleformat)) {
/* NOTE: if this field is not present then the data is integer... */
if (bitspersample > 16)
sampleformat = 2; /* signed for ints and doubles */
else
sampleformat = 1; /* unsigned for shorts, chars and lower */
}
TIFFGetFieldDefaulted(tif, TIFFTAG_PHOTOMETRIC, &photometric);
/* check for colourmap images (Pseudocolor) */
range = 256L; /* old-style 8 bit palettes */
if (photometric == PHOTOMETRIC_PALETTE) {
TIFFGetField(tif, TIFFTAG_COLORMAP,
&red_cm, &green_cm, &blue_cm);
nbcols = 1 << ((bitspersample < 8) ? 8 : bitspersample);
for (n = 0; n < (int) nbcols; n++)
if ((red_cm[n] >= 256) || (green_cm[n] >= 256) ||
(blue_cm[n] >= 256)) {
range=65535L;
break;
}
}
/* fill what is expected of us... */
start[0] = (int)imXposition;
end[0] = (int)imXposition + imWidth - 1;
start[1] = (int)imYposition;
end[1] = (int)imYposition + imLength - 1;
start[2] = 0;
end[2] = 0; /* preparing for a 3d extention to TIFF */
*spp = samplesperpixel;
*bps = bitspersample;
*sf = sampleformat;
*pi = photometric;
buffp = (void **) malloc(samplesperpixel * sizeof(void *));
/* allocate the input buffer (must be known to the TIFF system) */
if ((bufIn = (uint8 *)_TIFFmalloc((tf_bytesperrow+1) * sizeof(uint8))) == NULL) {
LIARerror("Error(TIFFRead): Not enough memory");
TIFFClose(tif);
return(2);
}
for (i = 0 ; i < samplesperpixel ; i++) {
/* prepare output image buffer */
switch (bitspersample) {
/* smaller than 8-bit must be expanded */
case 1:
case 4:
if ((buffp[i] = malloc(imLength * imWidth * sizeof(uint8))) == NULL) {
LIARerror("Error(TIFFRead): Not enough memory");
_TIFFfree(bufIn);
TIFFClose(tif);
return(3);
}
break;
/* these must be expanded to 16 bits */
case 12:
if ((buffp[i] = malloc(imLength * imWidth * sizeof(uint16))) == NULL) {
LIARerror("Error(TIFFRead): Not enough memory");
_TIFFfree(bufIn);
TIFFClose(tif);
return(3);
}
break;
case 8:
case 16:
case 32:
case 64:
if ((buffp[i] = malloc(imLength * tf_bytesperrow)) == NULL) {
LIARerror("Error(TIFFRead): Not enough memory");
_TIFFfree(bufIn);
TIFFClose(tif);
return(4);
}
break;
default:
LIARerror("Error(TIFFRead): unsupported word length");
_TIFFfree(bufIn);
TIFFClose(tif);
return(8);
}
}
/* read can be performed now */
LIARdebug("Reading TIFF file %s ; [%d]x[%d], %d bps, %d spp, %d pi, %d sf\n",
fname,
imWidth,
imLength,
bitspersample,
samplesperpixel,
photometric,
sampleformat);
/* get planar arrangement */
TIFFGetField(tif, TIFFTAG_PLANARCONFIG, &config);
switch (config) {
case PLANARCONFIG_CONTIG :
/* all the data is arranged like this: RGBRGBRGB... */
LIARdebug("Contig config");
for (l = 0 ; l < imLength ; l++) {
if (TIFFReadScanline(tif, bufIn, l, 0) < 0) {
LIARerror("(load_tiff): Error while reading line %d", l);
for (i = 0 ; i < samplesperpixel ; i++)
free(buffp[i]);
_TIFFfree(bufIn);
TIFFClose(tif);
return 13;
}
switch (bitspersample) {
case 1:
for (k = 0 ; k < samplesperpixel ; k++) {
cp = (uint8*)(buffp[k]);
for (j = 0 ; j < imWidth ; j++) {
jj = k + j*samplesperpixel;
cp[j + l*imWidth] = (uint8) ((uint8)(bufIn[jj>>3] & (1 << (7-jj%8))) > 0);
}
}
break;
case 4:
for (k = 0 ; k < samplesperpixel ; k++) {
cp = (uint8*)(buffp[k]);
for (j = 0 ; j < imWidth ; j++) {
jj = k + j*samplesperpixel;
cp[j + l*imWidth] = (uint8) ((uint8)(bufIn[jj>>1] << 4));
}
}
break;
case 8:
for (k = 0 ; k < samplesperpixel ; k++) {
cp = (uint8*)(buffp[k]) + l*imWidth;
cpi = bufIn + k;
for (j = 0 ; j < imWidth ; j++) {
*cp++ = *cpi;
cpi += samplesperpixel;
}
}
break;
case 12: {
/* assuming 2*12bits packed in 3*8-bits variables */
int linelength = samplesperpixel * imWidth;
int b, p, byteindex;
uint16 msb, lsb, val;
for (b = 0, p = 0 ; b < linelength ; ++b) {
byteindex = (b * 3) / 2;
if ((b % 2) == 0) {
msb = bufIn[byteindex];
lsb = bufIn[byteindex+1];
val = (msb << 4) + (lsb >> 4);
} else {
msb = bufIn[byteindex] & 0x0f;
lsb = bufIn[byteindex+1];
val = (msb << 8) + lsb;
}
/* find component */
k = b % samplesperpixel; /* should work when samplesperpixel == 1 */
sp = (uint16*)(buffp[k]) + l*imWidth;
sp[p++] = val;
}
}
break;
case 16:
for (k = 0 ; k < samplesperpixel ; k++) {
sp = (uint16*)(buffp[k]) + l*imWidth;
spi = (uint16*)bufIn + k;
for (j = 0 ; j < imWidth ; j++) {
*sp++ = *spi;
spi += samplesperpixel;
}
}
break;
case 32:
for (k = 0 ; k < samplesperpixel ; k++) {
lp = (uint32*)(buffp[k]) + l*imWidth;
lpi = (uint32*)bufIn + k;
for (j = 0 ; j < imWidth ; j++) {
*lp++ = *lpi;
lpi += samplesperpixel;
}
}
break;
case 64:
for (k = 0 ; k < samplesperpixel ; k++) {
dp = (double*)(buffp[k]) + l*imWidth;
dpi = (double*)bufIn + k;
for (j = 0 ; j < imWidth ; j++) {
*dp++ = *dpi;
dpi += samplesperpixel;
}
}
break;
}
}
break;
case PLANARCONFIG_SEPARATE:
/* this is a little easier:
RRRR..., then GGG..., then BBB..., etc
*/
LIARdebug("Separate config");
for (k = 0 ; k < samplesperpixel ; k++) {
for (l = 0 ; l < imLength ; l++) {
/* read component k in line l */
if (TIFFReadScanline(tif, bufIn, l, k) < 0) {
LIARerror("(load_tiff): Error while reading component %d in line %d", k, l);
for (i = 0 ; i < samplesperpixel ; i++)
free(buffp[i]);
_TIFFfree(bufIn);
TIFFClose(tif);
return 13;
}
/* write this line out */
switch (bitspersample) {
case 1:
cp = (uint8*)(buffp[k]);
for (j = 0 ; j < imWidth ; j++) {
cp[j + l*imWidth] = (uint8) ((uint8)(bufIn[j>>3] & (1 << (7-j%8))) > 0);
}
break;
case 4:
cp = (uint8*)(buffp[k]);
for (j = 0 ; j < imWidth ; j++) {
cp[j + l*imWidth] = (uint8) ((uint8)(bufIn[j>>1] << 4));
}
break;
case 8:
cp = (uint8*)(buffp[k]) + l*imWidth;
cpi = bufIn;
for (j = 0 ; j < imWidth ; j++)
*cp++ = *cpi++;
break;
case 12: {
/* assuming 2*12bits packed in 3*8-bits variables */
int linelength = imWidth;
int b, p, byteindex;
uint16 msb, lsb, val;
for (b = 0, p = 0 ; b < linelength ; ++b) {
byteindex = (b * 3) / 2;
if ((b % 2) == 0) {
msb = bufIn[byteindex];
lsb = bufIn[byteindex+1];
val = (msb << 4) + (lsb >> 4);
} else {
msb = bufIn[byteindex] & 0x0f;
lsb = bufIn[byteindex+1];
val = (msb << 8) + lsb;
}
/* find component */
sp = (uint16*)(buffp[k]) + l*imWidth;
sp[p++] = val;
}
}
break;
case 16:
sp = (uint16*)(buffp[k]) + l*imWidth;
spi = (uint16*)bufIn;
for (j = 0 ; j < imWidth ; j++)
*sp++ = *spi++;
break;
case 32:
lp = (uint32*)(buffp[k]) + l*imWidth;
lpi = (uint32*)bufIn;
for (j = 0 ; j < imWidth ; j++)
*lp++ = *lpi++;
break;
case 64:
dp = (double*)(buffp[k]) + l*imWidth;
dpi = (double*)bufIn;
for (j = 0 ; j < imWidth ; j++)
*dp++ = *dpi++;
break;
}
}
}
break;
default:
LIARerror("Unrecognized pixel configuration");
for (i = 0 ; i < samplesperpixel ; i++)
free(buffp[i]);
_TIFFfree(bufIn);
TIFFClose(tif);
return(16);
}
/* apply the palette if needs be */
/* reduce everything to an 8bit RGB image. Too hard otherwise */
if ((photometric == PHOTOMETRIC_PALETTE) &&
(*bps == 8) && (*spp == 1)) {
uint8 *pR, *pG, *pB, *q;
uint8 **outbuffp;
outbuffp = (uint8 **) malloc(3 * sizeof(void *));
pR = outbuffp[0] = (uint8 *)malloc(imLength*imWidth*sizeof(uint8));
pG = outbuffp[1] = (uint8 *)malloc(imLength*imWidth*sizeof(uint8));
pB = outbuffp[2] = (uint8 *)malloc(imLength*imWidth*sizeof(uint8));
q = (uint8*)(buffp[0]);
for (i = 0 ; i < imLength * imWidth ; i++) {
(*pR) = (255*red_cm[*q])/range;
(*pG) = (255*green_cm[*q])/range;
(*pB) = (255*blue_cm[*q])/range;
pR++; pG++; pB++;
q++;
}
free(buffp[0]);
free(buffp);
/* change the interpretation */
*spp = 3; /* RGB */
*pi = PHOTOMETRIC_RGB; /* same */
*inbuffp = outbuffp;
} else {
/* return the allocated buffer */
*inbuffp = buffp;
}
/* at the moment, no CLUT Hugues Talbot 11 Dec 1996 */
*ncolours = 0;
colourmap[0] = colourmap[1] = colourmap[2] = 0;
TIFFClose(tif);
_TIFFfree(bufIn);
return 0;
}
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