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#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: ra_bmp.c,v 2.6 2004/04/30 17:56:06 greg Exp $"; |
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#endif |
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/* |
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* program to convert between RADIANCE and Windows BMP file |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <stdio.h> |
| 9 |
#include <string.h> |
| 10 |
|
| 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 */ |
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|
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char *progname; |
| 22 |
|
| 23 |
static void quiterr(const char *err); |
| 24 |
static void tmap2bmp(char *fnin, char *fnout, char *expec, |
| 25 |
RGBPRIMP monpri, double gamval); |
| 26 |
static void rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, int gry); |
| 27 |
static void bmp2rad(BMPReader *brd, FILE *rfp, int inv); |
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|
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|
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int |
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main(int argc, char *argv[]) |
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{ |
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char *inpfile=NULL, *outfile=NULL; |
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char *expec = NULL; |
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int reverse = 0; |
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RGBPRIMP rgbp = stdprims; |
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RGBPRIMS myprims; |
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RESOLU rs; |
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int i; |
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|
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progname = argv[0]; |
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|
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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]) { |
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case 'b': |
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rgbp = NULL; |
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break; |
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case 'g': |
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gamcor = atof(argv[++i]); |
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break; |
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case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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expec = argv[++i]; |
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else |
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bradj = atoi(argv[++i]); |
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break; |
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case 'p': |
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if (argc-i < 9) |
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goto userr; |
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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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if (rgbp == stdprims) |
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rgbp = myprims; |
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break; |
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case 'r': |
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reverse = !reverse; |
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break; |
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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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|
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if (i < argc-2) |
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goto userr; |
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|
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SET_FILE_BINARY(stdin); |
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SET_FILE_BINARY(stdout); |
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SET_DEFAULT_BINARY(); |
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|
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if (i <= argc-1 && strcmp(argv[i], "-")) |
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inpfile = argv[i]; |
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|
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if (i == argc-2 && strcmp(argv[i+1], "-")) |
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outfile = argv[i+1]; |
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/* check for tone-mapping */ |
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if (expec != NULL) { |
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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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|
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setcolrgam(gamcor); /* set up conversion */ |
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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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|
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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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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 (checkheader(stdin, COLRFMT, 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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if (outfile != NULL) |
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hdr->compr = BI_RLE8; |
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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==NULL); |
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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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/* convert Radiance picture to BMP */ |
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static void |
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rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, int gry) |
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{ |
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COLR *scanin; |
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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)); |
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if (scanin == NULL) |
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quiterr("out of memory in rad2bmp"); |
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/* convert image */ |
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if (inv) { |
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y = bwr->hdr->height - 1; |
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ystp = -1; yend = -1; |
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} else { |
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y = 0; |
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ystp = 1; yend = bwr->hdr->height; |
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} |
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/* convert each scanline */ |
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for ( ; y != yend; y += ystp) { |
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if (freadcolrs(scanin, bwr->hdr->width, rfp) < 0) |
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quiterr("error reading Radiance picture"); |
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if (bradj) |
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shiftcolrs(scanin, bwr->hdr->width, bradj); |
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for (x = gry ? bwr->hdr->width : 0; x--; ) |
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scanin[x][GRN] = normbright(scanin[x]); |
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colrs_gambs(scanin, bwr->hdr->width); |
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if (gry) |
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for (x = bwr->hdr->width; x--; ) |
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bwr->scanline[x] = scanin[x][GRN]; |
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else |
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for (x = bwr->hdr->width; x--; ) { |
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bwr->scanline[3*x] = scanin[x][BLU]; |
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bwr->scanline[3*x+1] = scanin[x][GRN]; |
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bwr->scanline[3*x+2] = scanin[x][RED]; |
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} |
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bwr->yscan = y; |
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x = BMPwriteScanline(bwr); |
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if (x != BIR_OK) |
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quiterr(BMPerrorMessage(x)); |
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} |
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/* free scanline */ |
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free((void *)scanin); |
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} |
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|
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/* convert BMP file to Radiance */ |
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static void |
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bmp2rad(BMPReader *brd, FILE *rfp, int inv) |
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{ |
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COLR *scanout; |
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int y, yend, ystp; |
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int x; |
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/* allocate scanline */ |
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scanout = (COLR *)malloc(brd->hdr->width*sizeof(COLR)); |
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if (scanout == NULL) |
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quiterr("out of memory in bmp2rad"); |
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/* convert image */ |
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if (inv) { |
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y = brd->hdr->height - 1; |
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ystp = -1; yend = -1; |
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} else { |
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y = 0; |
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ystp = 1; yend = brd->hdr->height; |
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} |
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/* convert each scanline */ |
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for ( ; y != yend; y += ystp) { |
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x = BMPseekScanline(y, brd); |
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if (x != BIR_OK) |
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quiterr(BMPerrorMessage(x)); |
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for (x = brd->hdr->width; x--; ) { |
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RGBquad rgbq = BMPdecodePixel(x, brd); |
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scanout[x][RED] = rgbq.r; |
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scanout[x][GRN] = rgbq.g; |
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scanout[x][BLU] = rgbq.b; |
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} |
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gambs_colrs(scanout, brd->hdr->width); |
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if (bradj) |
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shiftcolrs(scanout, brd->hdr->width, bradj); |
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if (fwritecolrs(scanout, brd->hdr->width, rfp) < 0) |
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quiterr("error writing Radiance picture"); |
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} |
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/* clean up */ |
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free((void *)scanout); |
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} |
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|
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/* Tone-map and convert Radiance picture */ |
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static void |
| 290 |
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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RESOLU rs; |
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FILE *fp; |
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int xr, yr; |
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BYTE *pa; |
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int i; |
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/* check tone-mapping spec */ |
| 301 |
i = strlen(expec); |
| 302 |
if (i && !strncmp(expec, "auto", i)) |
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tmflags = TM_F_CAMERA; |
| 304 |
else if (i && !strncmp(expec, "human", i)) |
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tmflags = TM_F_HUMAN & ~TM_F_UNIMPL; |
| 306 |
else if (i && !strncmp(expec, "linear", i)) |
| 307 |
tmflags = TM_F_LINEAR; |
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else |
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quiterr("illegal exposure specification (auto|human|linear)"); |
| 310 |
if (monpri == NULL) { |
| 311 |
tmflags |= TM_F_BW; |
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monpri = stdprims; |
| 313 |
} |
| 314 |
/* open Radiance input */ |
| 315 |
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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} |
| 321 |
/* get picture orientation */ |
| 322 |
if (fnin != NULL) { |
| 323 |
if (getheader(fp, NULL, NULL) < 0 || !fgetsresolu(&rs, fp)) |
| 324 |
quiterr("bad Radiance picture format"); |
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rewind(fp); |
| 326 |
} else /* assume stdin has normal orient */ |
| 327 |
rs.rt = PIXSTANDARD; |
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/* tone-map picture */ |
| 329 |
if (tmMapPicture(&pa, &xr, &yr, tmflags, monpri, gamval, |
| 330 |
0., 0., fnin, fp) != TM_E_OK) |
| 331 |
exit(1); |
| 332 |
/* initialize BMP header */ |
| 333 |
if (tmflags & TM_F_BW) { |
| 334 |
hdr = BMPmappedHeader(xr, yr, 0, 256); |
| 335 |
if (fnout != NULL) |
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hdr->compr = BI_RLE8; |
| 337 |
} else |
| 338 |
hdr = BMPtruecolorHeader(xr, yr, 0); |
| 339 |
if (hdr == NULL) |
| 340 |
quiterr("cannot initialize BMP header"); |
| 341 |
/* open BMP output */ |
| 342 |
if (fnout != NULL) |
| 343 |
wtr = BMPopenOutputFile(fnout, hdr); |
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else |
| 345 |
wtr = BMPopenOutputStream(stdout, hdr); |
| 346 |
if (wtr == NULL) |
| 347 |
quiterr("cannot allocate writer structure"); |
| 348 |
/* write to BMP file */ |
| 349 |
while (wtr->yscan < yr) { |
| 350 |
BYTE *scn = pa + xr*((tmflags & TM_F_BW) ? 1 : 3)* |
| 351 |
(yr-1 - wtr->yscan); |
| 352 |
if (tmflags & TM_F_BW) |
| 353 |
memcpy((void *)wtr->scanline, (void *)scn, xr); |
| 354 |
else |
| 355 |
for (i = xr; i--; ) { |
| 356 |
wtr->scanline[3*i] = scn[3*i+BLU]; |
| 357 |
wtr->scanline[3*i+1] = scn[3*i+GRN]; |
| 358 |
wtr->scanline[3*i+2] = scn[3*i+RED]; |
| 359 |
} |
| 360 |
if ((i = BMPwriteScanline(wtr)) != BIR_OK) |
| 361 |
quiterr(BMPerrorMessage(i)); |
| 362 |
} |
| 363 |
/* flush output */ |
| 364 |
if (fflush((FILE *)wtr->c_data) < 0) |
| 365 |
quiterr("error writing BMP output"); |
| 366 |
/* clean up */ |
| 367 |
free((void *)pa); |
| 368 |
BMPcloseOutput(wtr); |
| 369 |
} |
