| 1 |
#ifndef lint
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| 2 |
static const char RCSid[] = "$Id: ra_bmp.c,v 2.19 2025/09/14 15:08:26 greg Exp $";
|
| 3 |
#endif
|
| 4 |
/*
|
| 5 |
* program to convert between RADIANCE and Windows BMP file
|
| 6 |
*/
|
| 7 |
|
| 8 |
#include <math.h>
|
| 9 |
|
| 10 |
#include "rtio.h"
|
| 11 |
#include "platform.h"
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| 12 |
#include "color.h"
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| 13 |
#include "tonemap.h"
|
| 14 |
#include "resolu.h"
|
| 15 |
#include "bmpfile.h"
|
| 16 |
|
| 17 |
int bradj = 0; /* brightness adjustment */
|
| 18 |
|
| 19 |
double gamcor = 2.2; /* gamma correction value */
|
| 20 |
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| 21 |
char *info = ""; /* information header string */
|
| 22 |
int infolen = 0; /* information header length */
|
| 23 |
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| 24 |
extern void quiterr(const char *err);
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| 25 |
extern void addBMPcspace(RGBPRIMP pp, double gamma);
|
| 26 |
extern void tmap2bmp(char *fnin, char *fnout, char *expec,
|
| 27 |
RGBPRIMP monpri, double gamval);
|
| 28 |
extern void rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, RGBPRIMP monpri);
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| 29 |
extern void bmp2rad(BMPReader *brd, FILE *rfp, int inv);
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| 30 |
extern void info2rad(char *infs, int len, FILE *fout);
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| 31 |
extern char *growInfo(int n);
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| 32 |
extern gethfunc headline;
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| 33 |
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| 34 |
#define add2info(s) {int _n=strlen(s); memcpy(growInfo(_n), s, _n+1);}
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| 35 |
#define clearInfo() growInfo(-infolen)
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| 36 |
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| 37 |
RGBPRIMP rgbinp = stdprims; /* RGB input primitives */
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| 38 |
RGBPRIMS myinprims; /* custom primitives holder */
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| 39 |
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| 40 |
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| 41 |
int
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main(int argc, char *argv[])
|
| 43 |
{
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| 44 |
char *inpfile=NULL, *outfile=NULL;
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| 45 |
char *expec = NULL;
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| 46 |
int reverse = 0;
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| 47 |
RGBPRIMP rgbp = stdprims;
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| 48 |
RGBPRIMS myprims;
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| 49 |
RESOLU rs;
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| 50 |
int i;
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| 51 |
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| 52 |
fixargv0(argv[0]); /* assigns progname */
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| 54 |
for (i = 1; i < argc; i++)
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if (argv[i][0] == '-' && argv[i][1])
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| 56 |
switch (argv[i][1]) {
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| 57 |
case 'b':
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| 58 |
rgbp = NULL;
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break;
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| 60 |
case 'g':
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| 61 |
gamcor = atof(argv[++i]);
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break;
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| 63 |
case 'e':
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| 64 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
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| 65 |
expec = argv[++i];
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| 66 |
else
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| 67 |
bradj = atoi(argv[++i]);
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break;
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| 69 |
case 'p':
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| 70 |
if (argc-i < 9)
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goto userr;
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| 72 |
myprims[RED][CIEX] = atof(argv[++i]);
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myprims[RED][CIEY] = atof(argv[++i]);
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myprims[GRN][CIEX] = atof(argv[++i]);
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myprims[GRN][CIEY] = atof(argv[++i]);
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myprims[BLU][CIEX] = atof(argv[++i]);
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myprims[BLU][CIEY] = atof(argv[++i]);
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myprims[WHT][CIEX] = atof(argv[++i]);
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myprims[WHT][CIEY] = atof(argv[++i]);
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| 80 |
if (rgbp == stdprims)
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rgbp = myprims;
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break;
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| 83 |
case 'r':
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reverse = !reverse;
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break;
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| 86 |
default:
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| 87 |
goto userr;
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}
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else
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break;
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| 91 |
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| 92 |
if (i < argc-2)
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goto userr;
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| 95 |
SET_FILE_BINARY(stdin);
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SET_FILE_BINARY(stdout);
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SET_DEFAULT_BINARY();
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if (i <= argc-1 && strcmp(argv[i], "-"))
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inpfile = argv[i];
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if (i == argc-2 && strcmp(argv[i+1], "-"))
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outfile = argv[i+1];
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if (expec != NULL) { /* check for tone-mapping */
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if (reverse)
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goto userr;
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tmap2bmp(inpfile, outfile, expec, rgbp, gamcor);
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return(0);
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}
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if (reverse) {
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BMPReader *rdr;
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/* open BMP file or stream */
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if (inpfile != NULL)
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rdr = BMPopenInputFile(inpfile);
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else
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rdr = BMPopenInputStream(stdin);
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if (rdr == NULL) {
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fprintf(stderr, "%s: cannot open or recognize BMP\n",
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inpfile != NULL ? inpfile : "<stdin>");
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exit(1);
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}
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/* open Radiance output */
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if (outfile != NULL && freopen(outfile, "w", stdout) == NULL) {
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fprintf(stderr, "%s: cannot open for output\n",
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| 127 |
outfile);
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exit(1);
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}
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/* put Radiance header */
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newheader("RADIANCE", stdout);
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info2rad(BMPinfo(rdr->hdr), rdr->hdr->infoSiz, stdout);
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printargs(i, argv, stdout);
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fputformat(COLRFMT, stdout);
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putchar('\n');
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rs.xr = rdr->hdr->width;
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rs.yr = rdr->hdr->height;
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rs.rt = YMAJOR;
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/* write scans downward if we can */
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if (rdr->hdr->yIsDown || inpfile != NULL)
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rs.rt |= YDECR;
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fputsresolu(&rs, stdout);
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/* set up conversion */
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setcolrgam(gamcor);
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/* convert file */
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bmp2rad(rdr, stdout, !rdr->hdr->yIsDown & (inpfile!=NULL));
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/* flush output */
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BMPcloseInput(rdr);
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if (fflush(stdout) < 0)
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quiterr("error writing Radiance output");
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} else {
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BMPHeader *hdr;
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BMPWriter *wtr;
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/* open Radiance input */
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if (inpfile != NULL && freopen(inpfile, "r", stdin) == NULL) {
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fprintf(stderr, "%s: cannot open input file\n",
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inpfile);
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exit(1);
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}
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/* get/save header info. */
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if (getheader(stdin, headline, NULL) < 0 ||
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!fgetsresolu(&rs, stdin))
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quiterr("bad Radiance picture format");
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/* record color space */
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addBMPcspace(rgbp, gamcor);
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/* open output/write BMP header */
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| 167 |
if (rgbp == NULL) {
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hdr = BMPmappedHeader(scanlen(&rs),
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| 169 |
numscans(&rs), infolen+1, 256);
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/*
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if (outfile != NULL)
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hdr->compr = BI_RLE8;
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*/
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} else
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| 175 |
hdr = BMPtruecolorHeader(scanlen(&rs),
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| 176 |
numscans(&rs), infolen+1);
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| 177 |
if (hdr == NULL)
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| 178 |
quiterr("cannot create BMP output");
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| 179 |
/* copy info to BMP header */
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| 180 |
strcpy(BMPinfo(hdr), info);
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clearInfo();
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/* set up output direction */
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hdr->yIsDown = ((outfile == NULL) | (hdr->compr == BI_RLE8));
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/* open BMP output */
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if (outfile != NULL)
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wtr = BMPopenOutputFile(outfile, hdr);
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| 187 |
else
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wtr = BMPopenOutputStream(stdout, hdr);
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| 189 |
if (wtr == NULL)
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quiterr("cannot allocate writer structure");
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/* set up conversion */
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setcolrgam(gamcor);
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/* convert file */
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rad2bmp(stdin, wtr, !hdr->yIsDown, rgbp);
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/* flush output */
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if (fflush((FILE *)wtr->c_data) < 0)
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quiterr("error writing BMP output");
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BMPcloseOutput(wtr);
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}
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return(0); /* success */
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userr:
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fprintf(stderr,
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"Usage: %s [-b][-g gamma][-e spec][-p xr yr xg yg xb yb xw yw] [input|- [output]]\n",
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progname);
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fprintf(stderr,
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" or: %s -r [-g gamma][-e +/-stops] [input|- [output]]\n",
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progname);
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return(1);
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}
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/* print message and exit */
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| 212 |
void
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quiterr(const char *err)
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{
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| 215 |
if (err != NULL) {
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fprintf(stderr, "%s: %s\n", progname, err);
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exit(1);
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}
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exit(0);
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}
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/* grow (or shrink) saved info header string */
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char *
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growInfo(int n)
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{
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char *ns = NULL;
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if (infolen + n <= 0) {
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if (info) free(info);
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info = "";
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infolen = 0;
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return(NULL);
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}
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if (infolen)
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info = (char *)realloc(info, infolen+n+1);
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else
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info = (char *)malloc(n+1);
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| 238 |
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| 239 |
if (info == NULL)
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quiterr("out of memory in growInfo()");
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| 242 |
if (n > 0) memset(ns = info+infolen, 0, n+1);
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| 243 |
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infolen += n;
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return(ns);
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}
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| 247 |
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| 248 |
/* process header line (don't echo) */
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| 249 |
int
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| 250 |
headline(char *s, void *p)
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| 251 |
{
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| 252 |
char fmt[MAXFMTLEN];
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| 253 |
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| 254 |
if (isheadid(s)) /* skip header magic ID */
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| 255 |
return(0);
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| 256 |
if (formatval(fmt, s)) { /* check if format string */
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if (!strcmp(fmt,COLRFMT))
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| 258 |
return(0);
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| 259 |
if (!strcmp(fmt,CIEFMT)) {
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| 260 |
rgbinp = TM_XYZPRIM;
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| 261 |
return(0);
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}
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| 263 |
if (!strcmp(fmt,SPECFMT))
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| 264 |
return(0);
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| 265 |
return(-1);
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| 266 |
}
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| 267 |
if (isprims(s)) { /* get input primaries */
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| 268 |
primsval(myinprims, s);
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| 269 |
rgbinp = myinprims;
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| 270 |
return(0);
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| 271 |
}
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| 272 |
if (isexpos(s))
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| 273 |
return(0); /* ignore this on input */
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| 274 |
if (!strncmp(s, "GAMMA=", 6))
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| 275 |
return(0); /* should not be here! */
|
| 276 |
if (isncomp(s)) {
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| 277 |
NCSAMP = ncompval(s);
|
| 278 |
return(0);
|
| 279 |
}
|
| 280 |
if (iswlsplit(s)) {
|
| 281 |
wlsplitval(WLPART, s);
|
| 282 |
return(0);
|
| 283 |
}
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| 284 |
add2info(s); /* else save info string */
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| 285 |
return(1);
|
| 286 |
}
|
| 287 |
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| 288 |
/* add BMP output color space to info string */
|
| 289 |
void
|
| 290 |
addBMPcspace(RGBPRIMP pp, double gamma)
|
| 291 |
{
|
| 292 |
char ibuf[196];
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| 293 |
char *cp = ibuf;
|
| 294 |
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| 295 |
sprintf(cp, "GAMMA=%.2f\n", gamma);
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| 296 |
cp += strlen(cp);
|
| 297 |
if (pp != NULL) {
|
| 298 |
sprintf(cp,
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| 299 |
"%s %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f\n",
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| 300 |
PRIMARYSTR,
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| 301 |
pp[RED][CIEX],pp[RED][CIEY],
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| 302 |
pp[GRN][CIEX],pp[GRN][CIEY],
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| 303 |
pp[BLU][CIEX],pp[BLU][CIEY],
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| 304 |
pp[WHT][CIEX],pp[WHT][CIEY]);
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| 305 |
/* cp += strlen(cp); */
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| 306 |
}
|
| 307 |
add2info(ibuf);
|
| 308 |
}
|
| 309 |
|
| 310 |
/* write out Radiance header from BMP info string */
|
| 311 |
void
|
| 312 |
info2rad(char *infs, int len, FILE *fout)
|
| 313 |
{
|
| 314 |
char *cp;
|
| 315 |
/* must fit metadata profile */
|
| 316 |
if (len < 3 || infs[0] == '\n' ||
|
| 317 |
infs[--len] != '\0' || infs[len-1] != '\n')
|
| 318 |
return; /* not what we expected */
|
| 319 |
if (strlen(infs) < len || strstr(infs, "\n\n") != NULL)
|
| 320 |
return; /* also not cool */
|
| 321 |
/* check for gamma */
|
| 322 |
if ((cp = strstr(infs, "GAMMA=")) != NULL) {
|
| 323 |
/* copy what came before */
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| 324 |
fwrite(infs, 1, cp-infs, fout);
|
| 325 |
cp += 6;
|
| 326 |
gamcor = atof(cp); /* record setting */
|
| 327 |
while (*cp++ != '\n')
|
| 328 |
;
|
| 329 |
len -= cp - infs;
|
| 330 |
infs = cp; /* & elide from output */
|
| 331 |
}
|
| 332 |
fputs(infs, fout); /* copy the remainder */
|
| 333 |
}
|
| 334 |
|
| 335 |
/* convert Radiance picture to BMP */
|
| 336 |
void
|
| 337 |
rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, RGBPRIMP monpri)
|
| 338 |
{
|
| 339 |
int usexfm = 0;
|
| 340 |
COLORMAT xfm;
|
| 341 |
COLR *scanin;
|
| 342 |
COLOR cval;
|
| 343 |
int y, yend, ystp;
|
| 344 |
int x;
|
| 345 |
/* allocate scanline */
|
| 346 |
scanin = (COLR *)malloc(bwr->hdr->width*sizeof(COLR));
|
| 347 |
if (scanin == NULL)
|
| 348 |
quiterr("out of memory in rad2bmp");
|
| 349 |
/* set up color conversion */
|
| 350 |
usexfm = (monpri != NULL) ? (rgbinp != monpri) :
|
| 351 |
((rgbinp != TM_XYZPRIM) & (rgbinp != stdprims));
|
| 352 |
if (usexfm) {
|
| 353 |
RGBPRIMP destpri = monpri != NULL ? monpri : stdprims;
|
| 354 |
double expcomp = pow(2.0, (double)bradj);
|
| 355 |
if (rgbinp == TM_XYZPRIM)
|
| 356 |
compxyz2rgbWBmat(xfm, destpri);
|
| 357 |
else
|
| 358 |
comprgb2rgbWBmat(xfm, rgbinp, destpri);
|
| 359 |
for (y = 0; y < 3; y++)
|
| 360 |
for (x = 0; x < 3; x++)
|
| 361 |
xfm[y][x] *= expcomp;
|
| 362 |
}
|
| 363 |
/* convert image */
|
| 364 |
if (inv) {
|
| 365 |
y = bwr->hdr->height - 1;
|
| 366 |
ystp = -1; yend = -1;
|
| 367 |
} else {
|
| 368 |
y = 0;
|
| 369 |
ystp = 1; yend = bwr->hdr->height;
|
| 370 |
}
|
| 371 |
/* convert each scanline */
|
| 372 |
for ( ; y != yend; y += ystp) {
|
| 373 |
if (fread2colrs(scanin, bwr->hdr->width, rfp, NCSAMP, WLPART) < 0)
|
| 374 |
quiterr("error reading Radiance picture");
|
| 375 |
if (usexfm)
|
| 376 |
for (x = bwr->hdr->width; x--; ) {
|
| 377 |
colr_color(cval, scanin[x]);
|
| 378 |
colortrans(cval, xfm, cval);
|
| 379 |
setcolr(scanin[x], colval(cval,RED),
|
| 380 |
colval(cval,GRN),
|
| 381 |
colval(cval,BLU));
|
| 382 |
}
|
| 383 |
else if (bradj)
|
| 384 |
shiftcolrs(scanin, bwr->hdr->width, bradj);
|
| 385 |
if ((monpri == NULL) & (rgbinp != TM_XYZPRIM))
|
| 386 |
for (x = bwr->hdr->width; x--; )
|
| 387 |
scanin[x][GRN] = normbright(scanin[x]);
|
| 388 |
colrs_gambs(scanin, bwr->hdr->width);
|
| 389 |
if (monpri == NULL)
|
| 390 |
for (x = bwr->hdr->width; x--; )
|
| 391 |
bwr->scanline[x] = scanin[x][GRN];
|
| 392 |
else
|
| 393 |
for (x = bwr->hdr->width; x--; ) {
|
| 394 |
bwr->scanline[3*x] = scanin[x][BLU];
|
| 395 |
bwr->scanline[3*x+1] = scanin[x][GRN];
|
| 396 |
bwr->scanline[3*x+2] = scanin[x][RED];
|
| 397 |
}
|
| 398 |
bwr->yscan = y;
|
| 399 |
x = BMPwriteScanline(bwr);
|
| 400 |
if (x != BIR_OK)
|
| 401 |
quiterr(BMPerrorMessage(x));
|
| 402 |
}
|
| 403 |
free(scanin); /* free scanline */
|
| 404 |
}
|
| 405 |
|
| 406 |
/* convert BMP file to Radiance */
|
| 407 |
void
|
| 408 |
bmp2rad(BMPReader *brd, FILE *rfp, int inv)
|
| 409 |
{
|
| 410 |
COLR *scanout;
|
| 411 |
int y, yend, ystp;
|
| 412 |
int x;
|
| 413 |
/* allocate scanline */
|
| 414 |
scanout = (COLR *)malloc(brd->hdr->width*sizeof(COLR));
|
| 415 |
if (scanout == NULL)
|
| 416 |
quiterr("out of memory in bmp2rad");
|
| 417 |
/* convert image */
|
| 418 |
if (inv) {
|
| 419 |
y = brd->hdr->height - 1;
|
| 420 |
ystp = -1; yend = -1;
|
| 421 |
} else {
|
| 422 |
y = 0;
|
| 423 |
ystp = 1; yend = brd->hdr->height;
|
| 424 |
}
|
| 425 |
/* convert each scanline */
|
| 426 |
for ( ; y != yend; y += ystp) {
|
| 427 |
x = BMPseekScanline(y, brd);
|
| 428 |
if (x != BIR_OK)
|
| 429 |
quiterr(BMPerrorMessage(x));
|
| 430 |
for (x = brd->hdr->width; x--; ) {
|
| 431 |
RGBquad rgbq = BMPdecodePixel(x, brd);
|
| 432 |
scanout[x][RED] = rgbq.r;
|
| 433 |
scanout[x][GRN] = rgbq.g;
|
| 434 |
scanout[x][BLU] = rgbq.b;
|
| 435 |
}
|
| 436 |
gambs_colrs(scanout, brd->hdr->width);
|
| 437 |
if (bradj)
|
| 438 |
shiftcolrs(scanout, brd->hdr->width, bradj);
|
| 439 |
if (fwritecolrs(scanout, brd->hdr->width, rfp) < 0)
|
| 440 |
quiterr("error writing Radiance picture");
|
| 441 |
}
|
| 442 |
free(scanout); /* clean up */
|
| 443 |
}
|
| 444 |
|
| 445 |
/* Tone-map and convert Radiance picture */
|
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void
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tmap2bmp(char *fnin, char *fnout, char *expec, RGBPRIMP monpri, double gamval)
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{
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int tmflags;
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BMPHeader *hdr;
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BMPWriter *wtr;
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FILE *fp;
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int xr, yr;
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uby8 *pa;
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int i;
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/* check tone-mapping spec */
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i = strlen(expec);
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if (i && !strncmp(expec, "auto", i))
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tmflags = TM_F_CAMERA;
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else if (i && !strncmp(expec, "human", i))
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tmflags = TM_F_HUMAN & ~TM_F_UNIMPL;
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else if (i && !strncmp(expec, "linear", i))
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tmflags = TM_F_LINEAR;
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else
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quiterr("illegal exposure specification (auto|human|linear)");
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tmflags |= (monpri == NULL)*TM_F_BW;
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/* open Radiance input */
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if (fnin == NULL)
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fp = stdin;
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else if ((fp = fopen(fnin, "r")) == NULL) {
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fprintf(stderr, "%s: cannot open\n", fnin);
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exit(1);
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}
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/* tone-map picture */
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if (tmMapPicture(&pa, &xr, &yr, tmflags,
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tmflags&TM_F_BW ? stdprims : monpri, gamval,
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0., 0., fnin, fp) != TM_E_OK)
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exit(1);
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/* try to retrieve info */
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if (fseek(fp, 0L, SEEK_SET) == 0)
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getheader(fp, headline, NULL);
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/* add output color space */
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addBMPcspace(monpri, gamval);
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/* initialize BMP header */
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if (tmflags & TM_F_BW) {
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hdr = BMPmappedHeader(xr, yr, infolen+1, 256);
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if (fnout != NULL)
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hdr->compr = BI_RLE8;
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} else
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hdr = BMPtruecolorHeader(xr, yr, infolen+1);
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if (hdr == NULL)
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quiterr("cannot initialize BMP header");
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strcpy(BMPinfo(hdr), info); /* copy info if any */
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clearInfo();
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/* open BMP output */
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if (fnout != NULL)
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wtr = BMPopenOutputFile(fnout, hdr);
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else
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wtr = BMPopenOutputStream(stdout, hdr);
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if (wtr == NULL)
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quiterr("cannot allocate writer structure");
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/* write to BMP file */
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while (wtr->yscan < yr) {
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uby8 *scn = pa + xr*((tmflags & TM_F_BW) ? 1 : 3)*
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(yr-1 - wtr->yscan);
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if (tmflags & TM_F_BW)
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memcpy(wtr->scanline, scn, xr);
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else
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for (i = xr; i--; ) {
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wtr->scanline[3*i] = scn[3*i+BLU];
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wtr->scanline[3*i+1] = scn[3*i+GRN];
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wtr->scanline[3*i+2] = scn[3*i+RED];
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}
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if ((i = BMPwriteScanline(wtr)) != BIR_OK)
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quiterr(BMPerrorMessage(i));
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}
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/* flush output */
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if (fflush((FILE *)wtr->c_data) < 0)
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quiterr("error writing BMP output");
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/* clean up */
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if (fnin != NULL)
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fclose(fp);
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free(pa);
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BMPcloseOutput(wtr);
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}
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