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#ifndef lint |
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static const char RCSid[] = "$Id: ra_bmp.c,v 2.1 2004/03/26 03:11:50 greg Exp $"; |
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#endif |
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/* |
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* program to convert between RADIANCE and Windows BMP file |
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*/ |
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|
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#include <stdio.h> |
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#include "platform.h" |
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#include "color.h" |
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#include "resolu.h" |
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#include "bmpfile.h" |
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|
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int bradj = 0; /* brightness adjustment */ |
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|
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double gamcor = 2.2; /* gamma correction value */ |
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|
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char *progname; |
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|
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void quiterr(const char *); |
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void rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, int gry); |
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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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int gryflag = 0; |
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int reverse = 0; |
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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] == '-') |
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switch (argv[i][1]) { |
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case 'b': |
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gryflag = 1; |
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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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goto userr; |
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bradj = atoi(argv[++i]); |
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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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case '\0': |
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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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|
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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 (gryflag) { |
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hdr = BMPmappedHeader(numscans(&rs), |
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scanlen(&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(numscans(&rs), |
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scanlen(&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 = (rs.rt & YDECR) && |
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(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 && (rs.rt&YDECR), gryflag); |
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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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exit(0); /* success */ |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n", |
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progname); |
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exit(1); |
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return(1); /* gratis return */ |
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} |
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|
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/* print message and exit */ |
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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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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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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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} |
