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libvips/libsrc/format/radiance.c

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/* Read Radiance (.hdr) files
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
Remaining issues:
+ the whole image is unpacked to a 3-band float and so will (potentially)
need a fair bit of memory
we could just read RGBE/XYZE and leave it at 4 bytes per pixel, then
unpack on the fly with an operator along the lines of LabQ2Lab
+ it ignores some header fields, like VIEW and DATE
+ it will not rotate/flip as the FORMAT string asks
*/
/*
Sections of this reader from Greg Ward and Radiance with kind
permission. The Radience copyright notice appears below.
*/
/* ====================================================================
* The Radiance Software License, Version 1.0
*
* Copyright (c) 1990 - 2009 The Regents of the University of California,
* through Lawrence Berkeley National Laboratory. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes Radiance software
* (http://radsite.lbl.gov/)
* developed by the Lawrence Berkeley National Laboratory
* (http://www.lbl.gov/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
* and "The Regents of the University of California" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact radiance@radsite.lbl.gov.
*
* 5. Products derived from this software may not be called "Radiance",
* nor may "Radiance" appear in their name, without prior written
* permission of Lawrence Berkeley National Laboratory.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of Lawrence Berkeley National Laboratory. For more
* information on Lawrence Berkeley National Laboratory, please see
* <http://www.lbl.gov/>.
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <vips/vips.h>
#include <vips/internal.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* Begin copy-paste from Radiance sources.
*/
/* flags for scanline ordering */
#define XDECR 1
#define YDECR 2
#define YMAJOR 4
/* standard scanline ordering */
#define PIXSTANDARD (YMAJOR|YDECR)
#define PIXSTDFMT "-Y %d +X %d\n"
/* structure for image dimensions */
typedef struct {
int rt; /* orientation (from flags above) */
int xr, yr; /* x and y resolution */
} RESOLU;
/* macros to get scanline length and number */
#define scanlen(rs) ((rs)->rt & YMAJOR ? (rs)->xr : (rs)->yr)
#define numscans(rs) ((rs)->rt & YMAJOR ? (rs)->yr : (rs)->xr)
/* resolution string buffer and its size */
#define RESOLU_BUFLEN 32
/* macros for reading/writing resolution struct */
#define fputsresolu(rs,fp) fputs(resolu2str(resolu_buf,rs),fp)
#define fgetsresolu(rs,fp) str2resolu(rs, \
fgets(resolu_buf,RESOLU_BUFLEN,fp))
/* reading/writing of standard ordering */
#define fprtresolu(sl,ns,fp) fprintf(fp,PIXSTDFMT,ns,sl)
#define fscnresolu(sl,ns,fp) (fscanf(fp,PIXSTDFMT,ns,sl)==2)
/* defined in resolu.c */
typedef int gethfunc(char *s, void *p); /* callback to process header lines */
#define RED 0
#define GRN 1
#define BLU 2
#define CIEX 0 /* or, if input is XYZ... */
#define CIEY 1
#define CIEZ 2
#define EXP 3 /* exponent same for either format */
#define COLXS 128 /* excess used for exponent */
#define WHT 3 /* used for RGBPRIMS type */
#undef BYTE
#define BYTE unsigned char /* 8-bit unsigned integer */
typedef BYTE COLR[4]; /* red, green, blue (or X,Y,Z), exponent */
typedef float COLORV;
typedef COLORV COLOR[3]; /* red, green, blue (or X,Y,Z) */
typedef float RGBPRIMS[4][2]; /* (x,y) chromaticities for RGBW */
typedef float (*RGBPRIMP)[2]; /* pointer to RGBPRIMS array */
typedef float COLORMAT[3][3]; /* color coordinate conversion matrix */
#define copycolr(c1,c2) (c1[0]=c2[0],c1[1]=c2[1], \
c1[2]=c2[2],c1[3]=c2[3])
#define colval(col,pri) ((col)[pri])
#define setcolor(col,r,g,b) ((col)[RED]=(r),(col)[GRN]=(g),(col)[BLU]=(b))
#define copycolor(c1,c2) ((c1)[0]=(c2)[0],(c1)[1]=(c2)[1],(c1)[2]=(c2)[2])
#define scalecolor(col,sf) ((col)[0]*=(sf),(col)[1]*=(sf),(col)[2]*=(sf))
#define addcolor(c1,c2) ((c1)[0]+=(c2)[0],(c1)[1]+=(c2)[1],(c1)[2]+=(c2)[2])
#define multcolor(c1,c2) ((c1)[0]*=(c2)[0],(c1)[1]*=(c2)[1],(c1)[2]*=(c2)[2])
#ifdef NTSC
#define CIE_x_r 0.670 /* standard NTSC primaries */
#define CIE_y_r 0.330
#define CIE_x_g 0.210
#define CIE_y_g 0.710
#define CIE_x_b 0.140
#define CIE_y_b 0.080
#define CIE_x_w 0.3333 /* use true white */
#define CIE_y_w 0.3333
#else
#define CIE_x_r 0.640 /* nominal CRT primaries */
#define CIE_y_r 0.330
#define CIE_x_g 0.290
#define CIE_y_g 0.600
#define CIE_x_b 0.150
#define CIE_y_b 0.060
#define CIE_x_w 0.3333 /* use true white */
#define CIE_y_w 0.3333
#endif
#define STDPRIMS {{CIE_x_r,CIE_y_r},{CIE_x_g,CIE_y_g}, \
{CIE_x_b,CIE_y_b},{CIE_x_w,CIE_y_w}}
#define CIE_D ( CIE_x_r*(CIE_y_g - CIE_y_b) + \
CIE_x_g*(CIE_y_b - CIE_y_r) + \
CIE_x_b*(CIE_y_r - CIE_y_g) )
#define CIE_C_rD ( (1./CIE_y_w) * \
( CIE_x_w*(CIE_y_g - CIE_y_b) - \
CIE_y_w*(CIE_x_g - CIE_x_b) + \
CIE_x_g*CIE_y_b - CIE_x_b*CIE_y_g ) )
#define CIE_C_gD ( (1./CIE_y_w) * \
( CIE_x_w*(CIE_y_b - CIE_y_r) - \
CIE_y_w*(CIE_x_b - CIE_x_r) - \
CIE_x_r*CIE_y_b + CIE_x_b*CIE_y_r ) )
#define CIE_C_bD ( (1./CIE_y_w) * \
( CIE_x_w*(CIE_y_r - CIE_y_g) - \
CIE_y_w*(CIE_x_r - CIE_x_g) + \
CIE_x_r*CIE_y_g - CIE_x_g*CIE_y_r ) )
#define CIE_rf (CIE_y_r*CIE_C_rD/CIE_D)
#define CIE_gf (CIE_y_g*CIE_C_gD/CIE_D)
#define CIE_bf (CIE_y_b*CIE_C_bD/CIE_D)
/* As of 9-94, CIE_rf=.265074126, CIE_gf=.670114631 and CIE_bf=.064811243 */
/***** The following definitions are valid for RGB colors only... *****/
#define bright(col) (CIE_rf*(col)[RED]+CIE_gf*(col)[GRN]+CIE_bf*(col)[BLU])
#define normbright(c) ( ( (long)(CIE_rf*256.+.5)*(c)[RED] + \
(long)(CIE_gf*256.+.5)*(c)[GRN] + \
(long)(CIE_bf*256.+.5)*(c)[BLU] ) >> 8 )
/* luminous efficacies over visible spectrum */
#define MAXEFFICACY 683. /* defined maximum at 550 nm */
#define WHTEFFICACY 179. /* uniform white light */
#define D65EFFICACY 203. /* standard illuminant D65 */
#define INCEFFICACY 160. /* illuminant A (incand.) */
#define SUNEFFICACY 208. /* illuminant B (solar dir.) */
#define SKYEFFICACY D65EFFICACY /* skylight (should be 110) */
#define DAYEFFICACY D65EFFICACY /* combined sky and solar */
#define luminance(col) (WHTEFFICACY * bright(col))
/***** ...end of stuff specific to RGB colors *****/
#define intens(col) ( (col)[0] > (col)[1] \
? (col)[0] > (col)[2] ? (col)[0] : (col)[2] \
: (col)[1] > (col)[2] ? (col)[1] : (col)[2] )
#define colrval(c,p) ( (c)[EXP] ? \
ldexp((c)[p]+.5,(int)(c)[EXP]-(COLXS+8)) : \
0. )
#define WHTCOLOR {1.0,1.0,1.0}
#define BLKCOLOR {0.0,0.0,0.0}
#define WHTCOLR {128,128,128,COLXS+1}
#define BLKCOLR {0,0,0,0}
/* picture format identifier */
#define COLRFMT "32-bit_rle_rgbe"
#define CIEFMT "32-bit_rle_xyze"
#define PICFMT "32-bit_rle_???e" /* matches either */
#define LPICFMT 15 /* max format id len */
/* macros for exposures */
#define EXPOSSTR "EXPOSURE="
#define LEXPOSSTR 9
#define isexpos(hl) (!strncmp(hl,EXPOSSTR,LEXPOSSTR))
#define exposval(hl) atof((hl)+LEXPOSSTR)
#define fputexpos(ex,fp) fprintf(fp,"%s%e\n",EXPOSSTR,ex)
/* macros for pixel aspect ratios */
#define ASPECTSTR "PIXASPECT="
#define LASPECTSTR 10
#define isaspect(hl) (!strncmp(hl,ASPECTSTR,LASPECTSTR))
#define aspectval(hl) atof((hl)+LASPECTSTR)
#define fputaspect(pa,fp) fprintf(fp,"%s%f\n",ASPECTSTR,pa)
/* macros for primary specifications */
#define PRIMARYSTR "PRIMARIES="
#define LPRIMARYSTR 10
#define isprims(hl) (!strncmp(hl,PRIMARYSTR,LPRIMARYSTR))
#define primsval(p,hl) sscanf(hl+LPRIMARYSTR, \
"%f %f %f %f %f %f %f %f", \
&(p)[RED][CIEX],&(p)[RED][CIEY], \
&(p)[GRN][CIEX],&(p)[GRN][CIEY], \
&(p)[BLU][CIEX],&(p)[BLU][CIEY], \
&(p)[WHT][CIEX],&(p)[WHT][CIEY])
#define fputprims(p,fp) fprintf(fp, \
"%s %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f\n",\
PRIMARYSTR, \
(p)[RED][CIEX],(p)[RED][CIEY], \
(p)[GRN][CIEX],(p)[GRN][CIEY], \
(p)[BLU][CIEX],(p)[BLU][CIEY], \
(p)[WHT][CIEX],(p)[WHT][CIEY])
/* macros for color correction */
#define COLCORSTR "COLORCORR="
#define LCOLCORSTR 10
#define iscolcor(hl) (!strncmp(hl,COLCORSTR,LCOLCORSTR))
#define colcorval(cc,hl) sscanf(hl+LCOLCORSTR,"%f %f %f", \
&(cc)[RED],&(cc)[GRN],&(cc)[BLU])
#define fputcolcor(cc,fp) fprintf(fp,"%s %f %f %f\n",COLCORSTR, \
(cc)[RED],(cc)[GRN],(cc)[BLU])
#define CGAMUT_LOWER 01
#define CGAMUT_UPPER 02
#define CGAMUT (CGAMUT_LOWER|CGAMUT_UPPER)
#define rgb_cie(xyz,rgb) colortrans(xyz,rgb2xyzmat,rgb)
#define cpcolormat(md,ms) memcpy((void *)md,(void *)ms,sizeof(COLORMAT))
#define MAXLINE 512
char HDRSTR[] = "#?"; /* information header magic number */
char FMTSTR[] = "FORMAT="; /* format identifier */
char TMSTR[] = "CAPDATE="; /* capture date identifier */
static gethfunc mycheck;
static int
formatval( /* get format value (return true if format) */
register char *r,
register char *s
)
{
register char *cp = FMTSTR;
while (*cp) if (*cp++ != *s++) return(0);
while (isspace(*s)) s++;
if (!*s) return(0);
if (r == NULL) return(1);
do
*r++ = *s++;
while(*s && !isspace(*s));
*r = '\0';
return(1);
}
static int
isformat( /* is line a format line? */
char *s
)
{
return(formatval(NULL, s));
}
static int
getheader( /* get header from file */
FILE *fp,
gethfunc *f,
void *p
)
{
char buf[MAXLINE];
for ( ; ; ) {
buf[MAXLINE-2] = '\n';
if (fgets(buf, MAXLINE, fp) == NULL)
return(-1);
if (buf[0] == '\n')
return(0);
#ifdef MSDOS
if (buf[0] == '\r' && buf[1] == '\n')
return(0);
#endif
if (buf[MAXLINE-2] != '\n') {
ungetc(buf[MAXLINE-2], fp); /* prevent false end */
buf[MAXLINE-2] = '\0';
}
if (f != NULL && (*f)(buf, p) < 0)
return(-1);
}
}
struct check {
FILE *fp;
char fs[64];
};
static int
mycheck( /* check a header line for format info. */
char *s,
void *cp
)
{
if (!formatval(((struct check*)cp)->fs, s)
&& ((struct check*)cp)->fp != NULL) {
fputs(s, ((struct check*)cp)->fp);
}
return(0);
}
static int
globmatch( /* check for match of s against pattern p */
register char *p,
register char *s
)
{
int setmatch;
do {
switch (*p) {
case '?': /* match any character */
if (!*s++)
return(0);
break;
case '*': /* match any string */
while (p[1] == '*') p++;
do
if ( (p[1]=='?' || p[1]==*s) &&
globmatch(p+1,s) )
return(1);
while (*s++);
return(0);
case '[': /* character set */
setmatch = *s == *++p;
if (!*p)
return(0);
while (*++p != ']') {
if (!*p)
return(0);
if (*p == '-') {
setmatch += p[-1] <= *s && *s <= p[1];
if (!*++p)
break;
} else
setmatch += *p == *s;
}
if (!setmatch)
return(0);
s++;
break;
case '\\': /* literal next */
p++;
/* fall through */
default: /* normal character */
if (*p != *s)
return(0);
s++;
break;
}
} while (*p++);
return(1);
}
/*
* Checkheader(fin,fmt,fout) returns a value of 1 if the input format
* matches the specification in fmt, 0 if no input format was found,
* and -1 if the input format does not match or there is an
* error reading the header. If fmt is empty, then -1 is returned
* if any input format is found (or there is an error), and 0 otherwise.
* If fmt contains any '*' or '?' characters, then checkheader
* does wildcard expansion and copies a matching result into fmt.
* Be sure that fmt is big enough to hold the match in such cases,
* and that it is not a static, read-only string!
* The input header (minus any format lines) is copied to fout
* if fout is not NULL.
*/
static int
checkheader(
FILE *fin,
char *fmt,
FILE *fout
)
{
struct check cdat;
register char *cp;
cdat.fp = fout;
cdat.fs[0] = '\0';
if (getheader(fin, mycheck, &cdat) < 0)
return(-1);
if (!cdat.fs[0])
return(0);
for (cp = fmt; *cp; cp++) /* check for globbing */
if ((*cp == '?') | (*cp == '*')) {
if (globmatch(fmt, cdat.fs)) {
strcpy(fmt, cdat.fs);
return(1);
} else
return(-1);
}
return(strcmp(fmt, cdat.fs) ? -1 : 1); /* literal match */
}
static char resolu_buf[RESOLU_BUFLEN]; /* resolution line buffer */
static int
str2resolu(rp, buf) /* convert resolution line to struct */
register RESOLU *rp;
char *buf;
{
register char *xndx, *yndx;
register char *cp;
if (buf == NULL)
return(0);
xndx = yndx = NULL;
for (cp = buf; *cp; cp++)
if (*cp == 'X')
xndx = cp;
else if (*cp == 'Y')
yndx = cp;
if (xndx == NULL || yndx == NULL)
return(0);
rp->rt = 0;
if (xndx > yndx) rp->rt |= YMAJOR;
if (xndx[-1] == '-') rp->rt |= XDECR;
if (yndx[-1] == '-') rp->rt |= YDECR;
if ((rp->xr = atoi(xndx+1)) <= 0)
return(0);
if ((rp->yr = atoi(yndx+1)) <= 0)
return(0);
return(1);
}
#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */
#undef getc
#undef putc
#define getc getc_unlocked
#define putc putc_unlocked
#endif
#define MINELEN 8 /* minimum scanline length for encoding */
#define MAXELEN 0x7fff /* maximum scanline length for encoding */
#define MINRUN 4 /* minimum run length */
static int
oldreadcolrs(scanline, len, fp) /* read in an old colr scanline */
register COLR *scanline;
int len;
register FILE *fp;
{
int rshift;
register int i;
rshift = 0;
while (len > 0) {
scanline[0][RED] = getc(fp);
scanline[0][GRN] = getc(fp);
scanline[0][BLU] = getc(fp);
scanline[0][EXP] = getc(fp);
if (feof(fp) || ferror(fp))
return(-1);
if (scanline[0][RED] == 1 &&
scanline[0][GRN] == 1 &&
scanline[0][BLU] == 1) {
for (i = scanline[0][EXP] << rshift; i > 0; i--) {
copycolr(scanline[0], scanline[-1]);
scanline++;
len--;
}
rshift += 8;
} else {
scanline++;
len--;
rshift = 0;
}
}
return(0);
}
static int
freadcolrs(scanline, len, fp) /* read in an encoded colr scanline */
register COLR *scanline;
int len;
register FILE *fp;
{
register int i, j;
int code, val;
/* determine scanline type */
if ((len < MINELEN) | (len > MAXELEN))
return(oldreadcolrs(scanline, len, fp));
if ((i = getc(fp)) == EOF)
return(-1);
if (i != 2) {
ungetc(i, fp);
return(oldreadcolrs(scanline, len, fp));
}
scanline[0][GRN] = getc(fp);
scanline[0][BLU] = getc(fp);
if ((i = getc(fp)) == EOF)
return(-1);
if (scanline[0][GRN] != 2 || scanline[0][BLU] & 128) {
scanline[0][RED] = 2;
scanline[0][EXP] = i;
return(oldreadcolrs(scanline+1, len-1, fp));
}
if ((scanline[0][BLU]<<8 | i) != len)
return(-1); /* length mismatch! */
/* read each component */
for (i = 0; i < 4; i++)
for (j = 0; j < len; ) {
if ((code = getc(fp)) == EOF)
return(-1);
if (code > 128) { /* run */
code &= 127;
if ((val = getc(fp)) == EOF)
return -1;
if (j + code > len)
return -1; /* overrun */
while (code--)
scanline[j++][i] = val;
} else { /* non-run */
if (j + code > len)
return -1; /* overrun */
while (code--) {
if ((val = getc(fp)) == EOF)
return -1;
scanline[j++][i] = val;
}
}
}
return(0);
}
/* End copy-paste from Radiance sources.
*/
/* What we track during an radiance-file read.
*/
typedef struct {
char *filename;
IMAGE *out;
FILE *fin;
char format[256];
double expos;
COLOR colcor;
double aspect;
RGBPRIMS prims;
COLR *buf;
} Read;
static int
israd( const char *filename )
{
FILE *fin;
char format[256];
int result;
#ifdef DEBUG
printf( "israd: \"%s\"\n", filename );
#endif /*DEBUG*/
if( !(fin = fopen( filename, "r" )) )
return( 0 );
strcpy( format, PICFMT );
result = checkheader( fin, format, NULL );
fclose( fin );
return( result == 1 );
}
static void
read_destroy( Read *read )
{
IM_FREE( read->filename );
IM_FREEF( fclose, read->fin );
IM_FREE( read->buf );
im_free( read );
}
static Read *
read_new( const char *filename, IMAGE *out )
{
Read *read;
int i;
if( !(read = IM_NEW( NULL, Read )) )
return( NULL );
read->filename = im_strdup( NULL, filename );
read->out = out;
read->fin = NULL;
strcpy( read->format, COLRFMT );
read->expos = 1.0;
for( i = 0; i < 3; i++ )
read->colcor[i] = 1.0;
read->aspect = 1.0;
read->prims[0][0] = CIE_x_r;
read->prims[0][1] = CIE_y_r;
read->prims[1][0] = CIE_x_g;
read->prims[1][1] = CIE_y_g;
read->prims[2][0] = CIE_x_b;
read->prims[2][1] = CIE_y_b;
read->prims[3][0] = CIE_x_w;
read->prims[3][1] = CIE_y_w;
read->buf = NULL;
if( !(read->fin = fopen( filename, "r" )) ) {
read_destroy( read );
return( NULL );
}
return( read );
}
static int
rad2vips_process_line( char *line, Read *read )
{
if( isformat( line ) ) {
if( formatval( line, read->format ) )
return( -1 );
}
else if( isexpos( line ) ) {
read->expos *= exposval( line );
}
else if( iscolcor( line ) ) {
COLOR cc;
int i;
colcorval( cc, line );
for( i = 0; i < 3; i++ )
read->colcor[i] *= cc[i];
}
else if( isaspect( line ) ) {
read->aspect *= aspectval( line );
}
else if( isprims( line ) ) {
primsval( read->prims, line );
}
return( 0 );
}
static const char *prims_name[4][2] = {
{ "rad-prims-rx", "rad-prims-ry" },
{ "rad-prims-gx", "rad-prims-gy" },
{ "rad-prims-bx", "rad-prims-by" },
{ "rad-prims-wx", "rad-prims-wy" }
};
static const char *colcor_name[3] = {
"rad-colcor-r",
"rad-colcor-g",
"rad-colcor-b"
};
static int
rad2vips_get_header( Read *read, FILE *fin, IMAGE *out )
{
RESOLU rs;
int i, j;
if( getheader( fin, (gethfunc *) rad2vips_process_line, read ) ||
!fgetsresolu( &rs, fin ) ) {
im_error( "rad2vips",
"%s", _( "error reading radiance header" ) );
return( -1 );
}
out->Xsize = scanlen( &rs );
out->Ysize = numscans( &rs );
out->Bands = 4;
out->BandFmt = IM_BANDFMT_UCHAR;
out->Bbits = im_bits_of_fmt( out->BandFmt );
out->Coding = IM_CODING_NONE;
out->Xres = 1.0;
out->Yres = read->aspect;
out->Xoffset = 0.0;
out->Yoffset = 0.0;
if( im_meta_set_string( out, "rad-format", read->format ) )
return( -1 );
if( strcmp( read->format, COLRFMT ) == 0 )
out->Type = IM_TYPE_RGB;
else if( strcmp( read->format, CIEFMT ) == 0 )
out->Type = IM_TYPE_XYZ;
else
out->Type = IM_TYPE_MULTIBAND;
if( im_meta_set_double( out, "rad-expos", read->expos ) )
return( -1 );
for( i = 0; i < 3; i++ )
if( im_meta_set_double( out, colcor_name[i], read->colcor[i] ) )
return( -1 );
if( im_meta_set_double( out, "rad-aspect", read->aspect ) )
return( -1 );
for( i = 0; i < 4; i++ )
for( j = 0; j < 2; j++ )
if( im_meta_set_double( out,
prims_name[i][j], read->prims[i][j] ) )
return( -1 );
return( 0 );
}
static int
rad2vips_header( const char *filename, IMAGE *out )
{
Read *read;
#ifdef DEBUG
printf( "rad2vips_header: reading \"%s\"\n", filename );
#endif /*DEBUG*/
if( !(read = read_new( filename, out )) )
return( -1 );
if( rad2vips_get_header( read, read->fin, read->out ) ) {
read_destroy( read );
return( -1 );
}
read_destroy( read );
return( 0 );
}
static int
rad2vips_get_data( Read *read, FILE *fin, IMAGE *im )
{
int y;
#ifdef DEBUG
printf( "rad2vips_get_data\n" );
#endif /*DEBUG*/
if( im_outcheck( im ) ||
im_setupout( im ) )
return( -1 );
if( !(read->buf = IM_ARRAY( NULL, im->Xsize, COLR )) )
return( -1 );
for( y = 0; y < im->Ysize; y++ ) {
if( freadcolrs( read->buf, im->Xsize, fin ) ) {
im_error( "rad2vips", "%s", _( "read error" ) );
return( -1 );
}
if( im_writeline( y, im, (void *) read->buf ) )
return( -1 );
}
return( 0 );
}
static int
rad2vips( const char *filename, IMAGE *out )
{
Read *read;
#ifdef DEBUG
printf( "rad2vips: reading \"%s\"\n", filename );
#endif /*DEBUG*/
if( !(read = read_new( filename, out )) )
return( -1 );
if( rad2vips_get_header( read, read->fin, read->out ) ||
rad2vips_get_data( read, read->fin, read->out ) ) {
read_destroy( read );
return( -1 );
}
read_destroy( read );
return( 0 );
}
static const char *rad_suffs[] = { ".hdr", NULL };
/* rad format adds no new members.
*/
typedef VipsFormat VipsFormatRad;
typedef VipsFormatClass VipsFormatRadClass;
static void
vips_format_rad_class_init( VipsFormatRadClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsFormatClass *format_class = (VipsFormatClass *) class;
object_class->nickname = "rad";
object_class->description = _( "Radiance" );
format_class->is_a = israd;
format_class->header = rad2vips_header;
format_class->load = rad2vips;
format_class->save = NULL;
format_class->suffs = rad_suffs;
}
static void
vips_format_rad_init( VipsFormatRad *object )
{
}
G_DEFINE_TYPE( VipsFormatRad, vips_format_rad, VIPS_TYPE_FORMAT );
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