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/*
* Time-stamp: <99/03/23 18:21:58 panic>
* Author: The C-Mix Project <cmix@diku.dk>
* Arne John Glenstrup <panic@diku.dk>
* Contents: Saving ray traced images to a TIFF file.
*/
#ifdef HAVE_LIBTIFF
#include <tiffio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "tiff.h"
#define BITPLANES 8
#define pix_t uint8
static TIFF* tif = NULL;
static tif_color;
static tif_compress;
static pix_t* line;
int tiffOpenFile256colors(const char* prg_name, const char* filename,
const char* title,
int width, int height, int use_color, int compress) {
static uint16 rcolormap[1 << 8];
static uint16 gcolormap[1 << 8];
static uint16 bcolormap[1 << 8];
int m;
time_t now; char* nowstr; char datetimestr[21];
line = (pix_t*)calloc(width, sizeof(pix_t));
tif_color = use_color; tif_compress = compress;
if (!(tif = TIFFOpen(filename, "w"))) {
fprintf(stderr, "%s: Couldn't open file `%s'\n", prg_name, filename);
return -1;
} else {
TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
rcolormap[0] = 0; gcolormap[0] = 0; bcolormap[0] = 0;
rcolormap[1] = 65535; gcolormap[1] = 65535; bcolormap[1] = 65535;
if (use_color) {
for(m = 0; m < 216; m++) {
rcolormap[m + 2] = 13107*( m % 6);
gcolormap[m + 2] = 13107*((m/6) % 6);
bcolormap[m + 2] = 13107*((m/36) % 6);
}
for(m = 0; m < 27; m++) {
rcolormap[m + 220] = 3277*( m % 3);
gcolormap[m + 220] = 3277*((m/3) % 3);
bcolormap[m + 220] = 3277*((m/9) % 3);
}
}
else {
for(m = 0; m < (1 << 8) - 2; m++) {
rcolormap[m + 2] = (256 >> 8) * 256 * m;
gcolormap[m + 2] = (256 >> 8) * 256 * m;
bcolormap[m + 2] = (256 >> 8) * 256 * m;
}
}
TIFFSetField(tif, TIFFTAG_COLORMAP,
&rcolormap, &gcolormap, &bcolormap);
switch (tif_compress) {
case TIFF_COMPRESS_PACKBITS:
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_PACKBITS);
break;
case TIFF_COMPRESS_LZW:
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_LZW);
break;
case TIFF_COMPRESS_NONE:
default:
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
}
time(&now); nowstr = ctime(&now);
strncpy(datetimestr, nowstr + 4, 12);
strncpy(datetimestr + 12, nowstr + 19, 5);
strcpy(datetimestr + 17, " ");
TIFFSetField(tif, TIFFTAG_DATETIME, datetimestr);
TIFFSetField(tif, TIFFTAG_DOCUMENTNAME, filename);
TIFFSetField(tif, TIFFTAG_IMAGEDESCRIPTION, title);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height);
TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_BOTLEFT);
TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_PALETTE);
TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
TIFFSetField(tif, TIFFTAG_SOFTWARE, "C-Mix Project Ray Tracer");
}
return 0;
}
int tiffPlotColor256colors(int x, myfloat red, myfloat green, myfloat blue) {
short r,g,b;
static double r_err, g_err, b_err;
r_err += red * 6.0;
g_err += green * 6.0;
b_err += blue * 6.0;
if (r_err<1.0 && g_err<1.0 && b_err<1.0) {
r = (short) (r_err * 3.0); if (r<0) r = 0;
g = (short) (g_err * 3.0); if (g<0) g = 0;
b = (short) (b_err * 3.0); if (b<0) b = 0;
r_err -= (r/3.0);
g_err -= (g/3.0);
b_err -= (b/3.0);
line[x] = r+3*g+9*b+220;
} else {
r = (short) (r_err + 0.5); if (r>=6) r = 5;
g = (short) (g_err + 0.5); if (g>=6) g = 5;
b = (short) (b_err + 0.5); if (b>=6) b = 5;
r_err -= r;
g_err -= g;
b_err -= b;
line[x] = r+6*g+36*b+2;
}
return 0;
}
int tiffPlotGrey256colors(int x, myfloat red, myfloat green, myfloat blue) {
int i;
i = (red * 0.299 + green * 0.587 + blue * 0.114) *
(1 << BITPLANES) + (RANDOM()%100000)/100000.0;
if (i <= 0)
i = 0;
else if (i >= (1 << BITPLANES) - 1)
i = 1;
else
i++;
line[x] = i;
return 0;
}
int tiffPlot256colors(int x, myfloat red, myfloat green, myfloat blue) {
if (tif_color)
return tiffPlotColor256colors(x, red, green, blue);
else
return tiffPlotGrey256colors(x, red, green, blue);
}
int tiffOpenFile(const char* prg_name, const char* filename,
const char* title,
int width, int height, int use_color, int compress) {
int m;
time_t now; struct tm* nowstruct;
char* nowstr; char datetimestr[20];
tif_color = use_color; tif_compress = compress;
if (!(tif = TIFFOpen(filename, "w"))) {
fprintf(stderr, "%s: Couldn't open file `%s'\n", prg_name, filename);
return -1;
} else {
TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
switch (tif_compress) {
case TIFF_COMPRESS_PACKBITS:
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_PACKBITS);
break;
case TIFF_COMPRESS_LZW:
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_LZW);
break;
case TIFF_COMPRESS_NONE:
default:
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
}
time(&now); nowstruct = localtime(&now);
sprintf(datetimestr, "%4d:%02d:%02d %02d:%02d:%02d",
nowstruct->tm_year + 1900,
nowstruct->tm_mon + 1, nowstruct->tm_mday,
nowstruct->tm_hour, nowstruct->tm_min, nowstruct->tm_sec);
TIFFSetField(tif, TIFFTAG_DATETIME, datetimestr);
TIFFSetField(tif, TIFFTAG_DOCUMENTNAME, filename);
TIFFSetField(tif, TIFFTAG_IMAGEDESCRIPTION, title);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height);
TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_BOTLEFT);
TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, 1);
TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
TIFFSetField(tif, TIFFTAG_SOFTWARE, "C-Mix Project Ray Tracer");
if (use_color) {
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 3);
line = (pix_t*)calloc(width * 3, sizeof(pix_t));
} else {
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
line = (pix_t*)calloc(width, sizeof(pix_t));
}
}
return 0;
}
int tiffPlotColor(int x, myfloat red, myfloat green, myfloat blue) {
line[3 * x] = red * 256.0;
line[3 * x + 1] = green * 256.0;
line[3 * x + 2] = blue * 256.0;
return 0;
}
int tiffPlotGrey(int x, myfloat red, myfloat green, myfloat blue) {
int i;
i = (red + green + blue) / 3 * 256.0;
line[x] = i;
return 0;
}
int tiffPlot(int x, myfloat red, myfloat green, myfloat blue) {
if (tif_color)
return tiffPlotColor(x, red, green, blue);
else
return tiffPlotGrey(x, red, green, blue);
}
int tiffFlushLine(int y) {
if (tif)
return TIFFWriteScanline(tif, line, y, 0);
else
return -1;
}
int tiffCloseFile() {
TIFFClose(tif);
}
#endif
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