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/* +-------------------------------------------------------------------+ */
/* | Copyright 1993, David Koblas (koblas@netcom.com) | */
/* | | */
/* | Permission to use, copy, modify, and to distribute this software | */
/* | and its documentation for any purpose is hereby granted without | */
/* | fee, provided that the above copyright notice appear in all | */
/* | copies and that both that copyright notice and this permission | */
/* | notice appear in supporting documentation. There is no | */
/* | representations about the suitability of this software for | */
/* | any purpose. this software is provided "as is" without express | */
/* | or implied warranty. | */
/* | | */
/* +-------------------------------------------------------------------+ */
/* $Id: writeTIFF.c,v 1.5 1996/05/28 09:19:16 torsten Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <tiffio.h>
#include "image.h"
#undef howmany
#define howmany(x, y) (((x)+((y)-1))/(y))
#define streq(a,b) (strcmp(a,b) == 0)
int WriteTIFF(char *file, Image * image)
{
TIFF *out;
int samplesPP, bitsPP;
int x, y;
unsigned char *tbuf = NULL;
unsigned char *buf = NULL, *bp;
unsigned char *ucp = (unsigned char *) image->data;
unsigned short photometric;
if (image->isGrey) {
photometric = PHOTOMETRIC_MINISBLACK;
samplesPP = 1;
bitsPP = image->isBW ? 1 : 8;
if (bitsPP == 1)
buf = (unsigned char *) malloc(sizeof(char) * image->width / 8 + 4);
} else {
Image *cmapImage; /* GRR 960525 */
/* try compressing image to a colormap, but don't force compression */
if (!image->maskData) /* can TIFF store alpha channel with palette? */
cmapImage = ImageCompress(image, 256, 1);
if (cmapImage)
image = cmapImage; /* original was deleted in ImageCompress() */
if (image->cmapSize == 0 || image->cmapSize > 256) {
photometric = PHOTOMETRIC_RGB;
samplesPP = 3;
bitsPP = 8;
} else {
photometric = PHOTOMETRIC_PALETTE;
samplesPP = 1;
bitsPP = 8;
}
}
if ((out = TIFFOpen(file, "w")) == NULL)
return 1;
TIFFSetField(out, TIFFTAG_IMAGEWIDTH, (unsigned long) image->width);
TIFFSetField(out, TIFFTAG_IMAGELENGTH, (unsigned long) image->height);
TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, samplesPP);
TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, bitsPP);
TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
TIFFSetField(out, TIFFTAG_COMPRESSION, COMPRESSION_LZW);
TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, 1);
TIFFSetField(out, TIFFTAG_SOFTWARE, "XPaint 2.1");
if (photometric == PHOTOMETRIC_PALETTE) {
unsigned short *r, *g, *b;
int i;
r = (unsigned short *) malloc(sizeof(unsigned short) * 3 * image->cmapSize);
g = r + image->cmapSize;
b = g + image->cmapSize;
for (i = 0; i < image->cmapSize; i++) {
r[i] = image->cmapData[i * 3 + 0] * 256;
g[i] = image->cmapData[i * 3 + 1] * 256;
b[i] = image->cmapData[i * 3 + 2] * 256;
}
TIFFSetField(out, TIFFTAG_COLORMAP, r, g, b);
free(r);
}
/*
** Here is where we are lucky that TIFF and
** the Image format are the same.
** [ except for large colormap images ]
*/
if (image->cmapSize > 256)
tbuf = (unsigned char *) malloc(image->width * sizeof(char) * 3);
for (y = 0; y < image->height; y++) {
if (bitsPP == 8) {
if (image->cmapSize <= 256) {
TIFFWriteScanline(out, ucp, y, 0);
ucp += image->width * samplesPP;
} else {
unsigned char *p, *tp = tbuf;
for (x = 0; x < image->width; x++) {
p = ImagePixel(image, x, y);
*tp++ = *p++;
*tp++ = *p++;
*tp++ = *p++;
}
TIFFWriteScanline(out, tbuf, y, 0);
}
} else {
int shift = 7;
bp = buf;
*bp = 0;
for (x = 0; x < image->width; x++, ucp++) {
*bp |= (*ucp > 128 ? 1 : 0) << shift--;
if (shift < 0) {
shift = 7;
bp++;
*bp = 0;
}
}
TIFFWriteScanline(out, buf, y, 0);
}
}
if (image->maskData != NULL) {
TIFFWriteDirectory(out);
TIFFSetDirectory(out, 1);
samplesPP = 1;
bitsPP = 1;
TIFFSetField(out, TIFFTAG_IMAGEWIDTH, (unsigned long) image->width);
TIFFSetField(out, TIFFTAG_IMAGELENGTH, (unsigned long) image->height);
TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, samplesPP);
TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, bitsPP);
TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MASK);
TIFFSetField(out, TIFFTAG_COMPRESSION, COMPRESSION_PACKBITS);
TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, 1);
TIFFSetField(out, TIFFTAG_SOFTWARE, "XPaint");
ucp = image->maskData;
if (buf == NULL)
buf = (unsigned char *) malloc(sizeof(char) * image->width / 8 + 4);
for (y = 0; y < image->height; y++) {
int shift = 7;
bp = buf;
*bp = 0;
for (x = 0; x < image->width; x++, ucp++) {
*bp |= (*ucp ? 1 : 0) << shift--;
if (shift < 0) {
shift = 7;
bp++;
*bp = 0;
}
}
TIFFWriteScanline(out, buf, y, 0);
}
}
(void) TIFFClose(out);
if (buf != NULL)
free(buf);
if (tbuf != NULL)
free(tbuf);
return 0;
}
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