| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: ra_bmp.c,v 2.2 2004/03/27 05:43:37 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* 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 "resolu.h" |
| 14 |
#include "bmpfile.h" |
| 15 |
|
| 16 |
int bradj = 0; /* brightness adjustment */ |
| 17 |
|
| 18 |
double gamcor = 2.2; /* gamma correction value */ |
| 19 |
|
| 20 |
char *progname; |
| 21 |
|
| 22 |
static void quiterr(const char *); |
| 23 |
static void rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, int gry); |
| 24 |
static void bmp2rad(BMPReader *brd, FILE *rfp, int inv); |
| 25 |
|
| 26 |
|
| 27 |
int |
| 28 |
main(int argc, char *argv[]) |
| 29 |
{ |
| 30 |
char *inpfile=NULL, *outfile=NULL; |
| 31 |
int gryflag = 0; |
| 32 |
int reverse = 0; |
| 33 |
RESOLU rs; |
| 34 |
int i; |
| 35 |
|
| 36 |
progname = argv[0]; |
| 37 |
|
| 38 |
for (i = 1; i < argc; i++) |
| 39 |
if (argv[i][0] == '-') |
| 40 |
switch (argv[i][1]) { |
| 41 |
case 'b': |
| 42 |
gryflag = 1; |
| 43 |
break; |
| 44 |
case 'g': |
| 45 |
gamcor = atof(argv[++i]); |
| 46 |
break; |
| 47 |
case 'e': |
| 48 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 49 |
goto userr; |
| 50 |
bradj = atoi(argv[++i]); |
| 51 |
break; |
| 52 |
case 'r': |
| 53 |
reverse = !reverse; |
| 54 |
break; |
| 55 |
case '\0': |
| 56 |
break; |
| 57 |
default: |
| 58 |
goto userr; |
| 59 |
} |
| 60 |
else |
| 61 |
break; |
| 62 |
|
| 63 |
if (i < argc-2) |
| 64 |
goto userr; |
| 65 |
|
| 66 |
SET_FILE_BINARY(stdin); |
| 67 |
SET_FILE_BINARY(stdout); |
| 68 |
SET_DEFAULT_BINARY(); |
| 69 |
|
| 70 |
if (i <= argc-1 && strcmp(argv[i], "-")) |
| 71 |
inpfile = argv[i]; |
| 72 |
|
| 73 |
if (i == argc-2 && strcmp(argv[i+1], "-")) |
| 74 |
outfile = argv[i+1]; |
| 75 |
|
| 76 |
setcolrgam(gamcor); /* set up conversion */ |
| 77 |
|
| 78 |
if (reverse) { |
| 79 |
BMPReader *rdr; |
| 80 |
/* open BMP file or stream */ |
| 81 |
if (inpfile != NULL) |
| 82 |
rdr = BMPopenInputFile(inpfile); |
| 83 |
else |
| 84 |
rdr = BMPopenInputStream(stdin); |
| 85 |
|
| 86 |
if (rdr == NULL) { |
| 87 |
fprintf(stderr, "%s: cannot open or recognize BMP\n", |
| 88 |
inpfile != NULL ? inpfile : "<stdin>"); |
| 89 |
exit(1); |
| 90 |
} |
| 91 |
/* open Radiance output */ |
| 92 |
if (outfile != NULL && freopen(outfile, "w", stdout) == NULL) { |
| 93 |
fprintf(stderr, "%s: cannot open for output\n", |
| 94 |
outfile); |
| 95 |
exit(1); |
| 96 |
} |
| 97 |
/* put Radiance header */ |
| 98 |
newheader("RADIANCE", stdout); |
| 99 |
printargs(i, argv, stdout); |
| 100 |
fputformat(COLRFMT, stdout); |
| 101 |
putchar('\n'); |
| 102 |
rs.xr = rdr->hdr->width; |
| 103 |
rs.yr = rdr->hdr->height; |
| 104 |
rs.rt = YMAJOR; |
| 105 |
/* write scans downward if we can */ |
| 106 |
if (rdr->hdr->yIsDown || inpfile != NULL) |
| 107 |
rs.rt |= YDECR; |
| 108 |
fputsresolu(&rs, stdout); |
| 109 |
/* convert file */ |
| 110 |
bmp2rad(rdr, stdout, !rdr->hdr->yIsDown && inpfile!=NULL); |
| 111 |
/* flush output */ |
| 112 |
BMPcloseInput(rdr); |
| 113 |
if (fflush(stdout) < 0) |
| 114 |
quiterr("error writing Radiance output"); |
| 115 |
} else { |
| 116 |
BMPHeader *hdr; |
| 117 |
BMPWriter *wtr; |
| 118 |
/* open Radiance input */ |
| 119 |
if (inpfile != NULL && freopen(inpfile, "r", stdin) == NULL) { |
| 120 |
fprintf(stderr, "%s: cannot open input file\n", |
| 121 |
inpfile); |
| 122 |
exit(1); |
| 123 |
} |
| 124 |
/* get header info. */ |
| 125 |
if (checkheader(stdin, COLRFMT, NULL) < 0 || |
| 126 |
!fgetsresolu(&rs, stdin)) |
| 127 |
quiterr("bad Radiance picture format"); |
| 128 |
/* initialize BMP header */ |
| 129 |
if (gryflag) { |
| 130 |
hdr = BMPmappedHeader(numscans(&rs), |
| 131 |
scanlen(&rs), 0, 256); |
| 132 |
if (outfile != NULL) |
| 133 |
hdr->compr = BI_RLE8; |
| 134 |
} else |
| 135 |
hdr = BMPtruecolorHeader(numscans(&rs), |
| 136 |
scanlen(&rs), 0); |
| 137 |
if (hdr == NULL) |
| 138 |
quiterr("cannot initialize BMP header"); |
| 139 |
/* set up output direction */ |
| 140 |
hdr->yIsDown = (rs.rt & YDECR) && |
| 141 |
((outfile == NULL) | (hdr->compr == BI_RLE8)); |
| 142 |
/* open BMP output */ |
| 143 |
if (outfile != NULL) |
| 144 |
wtr = BMPopenOutputFile(outfile, hdr); |
| 145 |
else |
| 146 |
wtr = BMPopenOutputStream(stdout, hdr); |
| 147 |
if (wtr == NULL) |
| 148 |
quiterr("cannot allocate writer structure"); |
| 149 |
/* convert file */ |
| 150 |
rad2bmp(stdin, wtr, !hdr->yIsDown && (rs.rt&YDECR), gryflag); |
| 151 |
/* flush output */ |
| 152 |
if (fflush((FILE *)wtr->c_data) < 0) |
| 153 |
quiterr("error writing BMP output"); |
| 154 |
BMPcloseOutput(wtr); |
| 155 |
} |
| 156 |
exit(0); /* success */ |
| 157 |
userr: |
| 158 |
fprintf(stderr, |
| 159 |
"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n", |
| 160 |
progname); |
| 161 |
exit(1); |
| 162 |
return(1); /* gratis return */ |
| 163 |
} |
| 164 |
|
| 165 |
/* print message and exit */ |
| 166 |
static void |
| 167 |
quiterr(const char *err) |
| 168 |
{ |
| 169 |
if (err != NULL) { |
| 170 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 171 |
exit(1); |
| 172 |
} |
| 173 |
exit(0); |
| 174 |
} |
| 175 |
|
| 176 |
/* convert Radiance picture to BMP */ |
| 177 |
static void |
| 178 |
rad2bmp(FILE *rfp, BMPWriter *bwr, int inv, int gry) |
| 179 |
{ |
| 180 |
COLR *scanin; |
| 181 |
int y, yend, ystp; |
| 182 |
int x; |
| 183 |
/* allocate scanline */ |
| 184 |
scanin = (COLR *)malloc(bwr->hdr->width*sizeof(COLR)); |
| 185 |
if (scanin == NULL) |
| 186 |
quiterr("out of memory in rad2bmp"); |
| 187 |
/* convert image */ |
| 188 |
if (inv) { |
| 189 |
y = bwr->hdr->height - 1; |
| 190 |
ystp = -1; yend = -1; |
| 191 |
} else { |
| 192 |
y = 0; |
| 193 |
ystp = 1; yend = bwr->hdr->height; |
| 194 |
} |
| 195 |
/* convert each scanline */ |
| 196 |
for ( ; y != yend; y += ystp) { |
| 197 |
if (freadcolrs(scanin, bwr->hdr->width, rfp) < 0) |
| 198 |
quiterr("error reading Radiance picture"); |
| 199 |
if (bradj) |
| 200 |
shiftcolrs(scanin, bwr->hdr->width, bradj); |
| 201 |
for (x = gry ? bwr->hdr->width : 0; x--; ) |
| 202 |
scanin[x][GRN] = normbright(scanin[x]); |
| 203 |
colrs_gambs(scanin, bwr->hdr->width); |
| 204 |
if (gry) |
| 205 |
for (x = bwr->hdr->width; x--; ) |
| 206 |
bwr->scanline[x] = scanin[x][GRN]; |
| 207 |
else |
| 208 |
for (x = bwr->hdr->width; x--; ) { |
| 209 |
bwr->scanline[3*x] = scanin[x][BLU]; |
| 210 |
bwr->scanline[3*x+1] = scanin[x][GRN]; |
| 211 |
bwr->scanline[3*x+2] = scanin[x][RED]; |
| 212 |
} |
| 213 |
bwr->yscan = y; |
| 214 |
x = BMPwriteScanline(bwr); |
| 215 |
if (x != BIR_OK) |
| 216 |
quiterr(BMPerrorMessage(x)); |
| 217 |
} |
| 218 |
/* free scanline */ |
| 219 |
free((void *)scanin); |
| 220 |
} |
| 221 |
|
| 222 |
/* convert BMP file to Radiance */ |
| 223 |
static void |
| 224 |
bmp2rad(BMPReader *brd, FILE *rfp, int inv) |
| 225 |
{ |
| 226 |
COLR *scanout; |
| 227 |
int y, yend, ystp; |
| 228 |
int x; |
| 229 |
/* allocate scanline */ |
| 230 |
scanout = (COLR *)malloc(brd->hdr->width*sizeof(COLR)); |
| 231 |
if (scanout == NULL) |
| 232 |
quiterr("out of memory in bmp2rad"); |
| 233 |
/* convert image */ |
| 234 |
if (inv) { |
| 235 |
y = brd->hdr->height - 1; |
| 236 |
ystp = -1; yend = -1; |
| 237 |
} else { |
| 238 |
y = 0; |
| 239 |
ystp = 1; yend = brd->hdr->height; |
| 240 |
} |
| 241 |
/* convert each scanline */ |
| 242 |
for ( ; y != yend; y += ystp) { |
| 243 |
x = BMPseekScanline(y, brd); |
| 244 |
if (x != BIR_OK) |
| 245 |
quiterr(BMPerrorMessage(x)); |
| 246 |
for (x = brd->hdr->width; x--; ) { |
| 247 |
RGBquad rgbq = BMPdecodePixel(x, brd); |
| 248 |
scanout[x][RED] = rgbq.r; |
| 249 |
scanout[x][GRN] = rgbq.g; |
| 250 |
scanout[x][BLU] = rgbq.b; |
| 251 |
} |
| 252 |
gambs_colrs(scanout, brd->hdr->width); |
| 253 |
if (bradj) |
| 254 |
shiftcolrs(scanout, brd->hdr->width, bradj); |
| 255 |
if (fwritecolrs(scanout, brd->hdr->width, rfp) < 0) |
| 256 |
quiterr("error writing Radiance picture"); |
| 257 |
} |
| 258 |
/* clean up */ |
| 259 |
free((void *)scanout); |
| 260 |
} |
