| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: ra_bmp.c,v 2.16 2025/06/06 19:11:21 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" |
| 12 |
#include "color.h" |
| 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 |
|
| 21 |
static void quiterr(const char *err); |
| 22 |
static void tmap2bmp(char *fnin, char *fnout, char *expec, |
| 23 |
RGBPRIMP monpri, double gamval); |
| 24 |
static void rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, RGBPRIMP monpri); |
| 25 |
static void bmp2rad(BMPReader *brd, FILE *rfp, int inv); |
| 26 |
|
| 27 |
static RGBPRIMP rgbinp = stdprims; /* RGB input primitives */ |
| 28 |
static RGBPRIMS myinprims; /* custom primitives holder */ |
| 29 |
|
| 30 |
static gethfunc headline; |
| 31 |
|
| 32 |
|
| 33 |
int |
| 34 |
main(int argc, char *argv[]) |
| 35 |
{ |
| 36 |
char *inpfile=NULL, *outfile=NULL; |
| 37 |
char *expec = NULL; |
| 38 |
int reverse = 0; |
| 39 |
RGBPRIMP rgbp = stdprims; |
| 40 |
RGBPRIMS myprims; |
| 41 |
RESOLU rs; |
| 42 |
int i; |
| 43 |
|
| 44 |
fixargv0(argv[0]); /* assigns progname */ |
| 45 |
|
| 46 |
for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-' && argv[i][1]) |
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switch (argv[i][1]) { |
| 49 |
case 'b': |
| 50 |
rgbp = NULL; |
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break; |
| 52 |
case 'g': |
| 53 |
gamcor = atof(argv[++i]); |
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break; |
| 55 |
case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 57 |
expec = argv[++i]; |
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else |
| 59 |
bradj = atoi(argv[++i]); |
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break; |
| 61 |
case 'p': |
| 62 |
if (argc-i < 9) |
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goto userr; |
| 64 |
myprims[RED][CIEX] = atof(argv[++i]); |
| 65 |
myprims[RED][CIEY] = atof(argv[++i]); |
| 66 |
myprims[GRN][CIEX] = atof(argv[++i]); |
| 67 |
myprims[GRN][CIEY] = atof(argv[++i]); |
| 68 |
myprims[BLU][CIEX] = atof(argv[++i]); |
| 69 |
myprims[BLU][CIEY] = atof(argv[++i]); |
| 70 |
myprims[WHT][CIEX] = atof(argv[++i]); |
| 71 |
myprims[WHT][CIEY] = atof(argv[++i]); |
| 72 |
if (rgbp == stdprims) |
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rgbp = myprims; |
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break; |
| 75 |
case 'r': |
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reverse = !reverse; |
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break; |
| 78 |
default: |
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goto userr; |
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} |
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else |
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break; |
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|
| 84 |
if (i < argc-2) |
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goto userr; |
| 86 |
|
| 87 |
SET_FILE_BINARY(stdin); |
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SET_FILE_BINARY(stdout); |
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SET_DEFAULT_BINARY(); |
| 90 |
|
| 91 |
if (i <= argc-1 && strcmp(argv[i], "-")) |
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inpfile = argv[i]; |
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|
| 94 |
if (i == argc-2 && strcmp(argv[i+1], "-")) |
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outfile = argv[i+1]; |
| 96 |
/* check for tone-mapping */ |
| 97 |
if (expec != NULL) { |
| 98 |
if (reverse) |
| 99 |
goto userr; |
| 100 |
tmap2bmp(inpfile, outfile, expec, rgbp, gamcor); |
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return(0); |
| 102 |
} |
| 103 |
|
| 104 |
setcolrgam(gamcor); /* set up conversion */ |
| 105 |
|
| 106 |
if (reverse) { |
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BMPReader *rdr; |
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/* open BMP file or stream */ |
| 109 |
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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|
| 114 |
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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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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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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/* 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 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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/* initialize BMP header */ |
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if (rgbp == NULL) { |
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hdr = BMPmappedHeader(scanlen(&rs), |
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numscans(&rs), 0, 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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hdr = BMPtruecolorHeader(scanlen(&rs), |
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numscans(&rs), 0); |
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if (hdr == NULL) |
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quiterr("cannot initialize BMP header"); |
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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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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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/* 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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|
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/* print message and exit */ |
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static void |
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quiterr(const char *err) |
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{ |
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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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|
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/* process header line (don't echo) */ |
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static int |
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headline(char *s, void *p) |
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{ |
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char fmt[MAXFMTLEN]; |
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|
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if (formatval(fmt, s)) { /* check if format string */ |
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if (!strcmp(fmt,COLRFMT)) |
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return(0); |
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if (!strcmp(fmt,CIEFMT)) { |
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rgbinp = TM_XYZPRIM; |
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return(0); |
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} |
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if (!strcmp(fmt,SPECFMT)) |
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return(0); |
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return(-1); |
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} |
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if (isprims(s)) { /* get input primaries */ |
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primsval(myinprims, s); |
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rgbinp = myinprims; |
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return(0); |
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} |
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if (isncomp(s)) { |
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NCSAMP = ncompval(s); |
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return(0); |
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} |
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if (iswlsplit(s)) { |
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wlsplitval(WLPART, s); |
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return(0); |
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} |
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/* should I grok colcorr also? */ |
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return(0); |
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} |
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|
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|
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/* convert Radiance picture to BMP */ |
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static void |
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rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, RGBPRIMP monpri) |
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{ |
| 246 |
int usexfm = 0; |
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COLORMAT xfm; |
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COLR *scanin; |
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COLOR cval; |
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int y, yend, ystp; |
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int x; |
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/* allocate scanline */ |
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scanin = (COLR *)malloc(bwr->hdr->width*sizeof(COLR)); |
| 254 |
if (scanin == NULL) |
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quiterr("out of memory in rad2bmp"); |
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/* set up color conversion */ |
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usexfm = (monpri != NULL ? rgbinp != monpri : |
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rgbinp != TM_XYZPRIM && rgbinp != stdprims); |
| 259 |
if (usexfm) { |
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RGBPRIMP destpri = monpri != NULL ? monpri : stdprims; |
| 261 |
double expcomp = pow(2.0, (double)bradj); |
| 262 |
if (rgbinp == TM_XYZPRIM) |
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compxyz2rgbWBmat(xfm, destpri); |
| 264 |
else |
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comprgb2rgbWBmat(xfm, rgbinp, destpri); |
| 266 |
for (y = 0; y < 3; y++) |
| 267 |
for (x = 0; x < 3; x++) |
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xfm[y][x] *= expcomp; |
| 269 |
} |
| 270 |
/* convert image */ |
| 271 |
if (inv) { |
| 272 |
y = bwr->hdr->height - 1; |
| 273 |
ystp = -1; yend = -1; |
| 274 |
} else { |
| 275 |
y = 0; |
| 276 |
ystp = 1; yend = bwr->hdr->height; |
| 277 |
} |
| 278 |
/* convert each scanline */ |
| 279 |
for ( ; y != yend; y += ystp) { |
| 280 |
if (fread2colrs(scanin, bwr->hdr->width, rfp, NCSAMP, WLPART) < 0) |
| 281 |
quiterr("error reading Radiance picture"); |
| 282 |
if (usexfm) |
| 283 |
for (x = bwr->hdr->width; x--; ) { |
| 284 |
colr_color(cval, scanin[x]); |
| 285 |
colortrans(cval, xfm, cval); |
| 286 |
setcolr(scanin[x], colval(cval,RED), |
| 287 |
colval(cval,GRN), |
| 288 |
colval(cval,BLU)); |
| 289 |
} |
| 290 |
else if (bradj) |
| 291 |
shiftcolrs(scanin, bwr->hdr->width, bradj); |
| 292 |
if (monpri == NULL && rgbinp != TM_XYZPRIM) |
| 293 |
for (x = bwr->hdr->width; x--; ) |
| 294 |
scanin[x][GRN] = normbright(scanin[x]); |
| 295 |
colrs_gambs(scanin, bwr->hdr->width); |
| 296 |
if (monpri == NULL) |
| 297 |
for (x = bwr->hdr->width; x--; ) |
| 298 |
bwr->scanline[x] = scanin[x][GRN]; |
| 299 |
else |
| 300 |
for (x = bwr->hdr->width; x--; ) { |
| 301 |
bwr->scanline[3*x] = scanin[x][BLU]; |
| 302 |
bwr->scanline[3*x+1] = scanin[x][GRN]; |
| 303 |
bwr->scanline[3*x+2] = scanin[x][RED]; |
| 304 |
} |
| 305 |
bwr->yscan = y; |
| 306 |
x = BMPwriteScanline(bwr); |
| 307 |
if (x != BIR_OK) |
| 308 |
quiterr(BMPerrorMessage(x)); |
| 309 |
} |
| 310 |
/* free scanline */ |
| 311 |
free((void *)scanin); |
| 312 |
} |
| 313 |
|
| 314 |
/* convert BMP file to Radiance */ |
| 315 |
static void |
| 316 |
bmp2rad(BMPReader *brd, FILE *rfp, int inv) |
| 317 |
{ |
| 318 |
COLR *scanout; |
| 319 |
int y, yend, ystp; |
| 320 |
int x; |
| 321 |
/* allocate scanline */ |
| 322 |
scanout = (COLR *)malloc(brd->hdr->width*sizeof(COLR)); |
| 323 |
if (scanout == NULL) |
| 324 |
quiterr("out of memory in bmp2rad"); |
| 325 |
/* convert image */ |
| 326 |
if (inv) { |
| 327 |
y = brd->hdr->height - 1; |
| 328 |
ystp = -1; yend = -1; |
| 329 |
} else { |
| 330 |
y = 0; |
| 331 |
ystp = 1; yend = brd->hdr->height; |
| 332 |
} |
| 333 |
/* convert each scanline */ |
| 334 |
for ( ; y != yend; y += ystp) { |
| 335 |
x = BMPseekScanline(y, brd); |
| 336 |
if (x != BIR_OK) |
| 337 |
quiterr(BMPerrorMessage(x)); |
| 338 |
for (x = brd->hdr->width; x--; ) { |
| 339 |
RGBquad rgbq = BMPdecodePixel(x, brd); |
| 340 |
scanout[x][RED] = rgbq.r; |
| 341 |
scanout[x][GRN] = rgbq.g; |
| 342 |
scanout[x][BLU] = rgbq.b; |
| 343 |
} |
| 344 |
gambs_colrs(scanout, brd->hdr->width); |
| 345 |
if (bradj) |
| 346 |
shiftcolrs(scanout, brd->hdr->width, bradj); |
| 347 |
if (fwritecolrs(scanout, brd->hdr->width, rfp) < 0) |
| 348 |
quiterr("error writing Radiance picture"); |
| 349 |
} |
| 350 |
/* clean up */ |
| 351 |
free((void *)scanout); |
| 352 |
} |
| 353 |
|
| 354 |
/* Tone-map and convert Radiance picture */ |
| 355 |
static void |
| 356 |
tmap2bmp(char *fnin, char *fnout, char *expec, RGBPRIMP monpri, double gamval) |
| 357 |
{ |
| 358 |
int tmflags; |
| 359 |
BMPHeader *hdr; |
| 360 |
BMPWriter *wtr; |
| 361 |
FILE *fp; |
| 362 |
int xr, yr; |
| 363 |
uby8 *pa; |
| 364 |
int i; |
| 365 |
/* check tone-mapping spec */ |
| 366 |
i = strlen(expec); |
| 367 |
if (i && !strncmp(expec, "auto", i)) |
| 368 |
tmflags = TM_F_CAMERA; |
| 369 |
else if (i && !strncmp(expec, "human", i)) |
| 370 |
tmflags = TM_F_HUMAN & ~TM_F_UNIMPL; |
| 371 |
else if (i && !strncmp(expec, "linear", i)) |
| 372 |
tmflags = TM_F_LINEAR; |
| 373 |
else |
| 374 |
quiterr("illegal exposure specification (auto|human|linear)"); |
| 375 |
if (monpri == NULL) { |
| 376 |
tmflags |= TM_F_BW; |
| 377 |
monpri = stdprims; |
| 378 |
} |
| 379 |
/* open Radiance input */ |
| 380 |
if (fnin == NULL) |
| 381 |
fp = stdin; |
| 382 |
else if ((fp = fopen(fnin, "r")) == NULL) { |
| 383 |
fprintf(stderr, "%s: cannot open\n", fnin); |
| 384 |
exit(1); |
| 385 |
} |
| 386 |
/* tone-map picture */ |
| 387 |
if (tmMapPicture(&pa, &xr, &yr, tmflags, monpri, gamval, |
| 388 |
0., 0., fnin, fp) != TM_E_OK) |
| 389 |
exit(1); |
| 390 |
/* initialize BMP header */ |
| 391 |
if (tmflags & TM_F_BW) { |
| 392 |
hdr = BMPmappedHeader(xr, yr, 0, 256); |
| 393 |
if (fnout != NULL) |
| 394 |
hdr->compr = BI_RLE8; |
| 395 |
} else |
| 396 |
hdr = BMPtruecolorHeader(xr, yr, 0); |
| 397 |
if (hdr == NULL) |
| 398 |
quiterr("cannot initialize BMP header"); |
| 399 |
/* open BMP output */ |
| 400 |
if (fnout != NULL) |
| 401 |
wtr = BMPopenOutputFile(fnout, hdr); |
| 402 |
else |
| 403 |
wtr = BMPopenOutputStream(stdout, hdr); |
| 404 |
if (wtr == NULL) |
| 405 |
quiterr("cannot allocate writer structure"); |
| 406 |
/* write to BMP file */ |
| 407 |
while (wtr->yscan < yr) { |
| 408 |
uby8 *scn = pa + xr*((tmflags & TM_F_BW) ? 1 : 3)* |
| 409 |
(yr-1 - wtr->yscan); |
| 410 |
if (tmflags & TM_F_BW) |
| 411 |
memcpy((void *)wtr->scanline, (void *)scn, xr); |
| 412 |
else |
| 413 |
for (i = xr; i--; ) { |
| 414 |
wtr->scanline[3*i] = scn[3*i+BLU]; |
| 415 |
wtr->scanline[3*i+1] = scn[3*i+GRN]; |
| 416 |
wtr->scanline[3*i+2] = scn[3*i+RED]; |
| 417 |
} |
| 418 |
if ((i = BMPwriteScanline(wtr)) != BIR_OK) |
| 419 |
quiterr(BMPerrorMessage(i)); |
| 420 |
} |
| 421 |
/* flush output */ |
| 422 |
if (fflush((FILE *)wtr->c_data) < 0) |
| 423 |
quiterr("error writing BMP output"); |
| 424 |
/* clean up */ |
| 425 |
if (fnin != NULL) |
| 426 |
fclose(fp); |
| 427 |
free((void *)pa); |
| 428 |
BMPcloseOutput(wtr); |
| 429 |
} |
