| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
greg |
2.3 |
static const char RCSid[] = "$Id: srcskipload.c,v 2.2 2024/12/13 00:48:19 greg Exp $"; |
| 3 |
greg |
2.1 |
#endif |
| 4 |
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/* |
| 5 |
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* Load source exclusion maps (BMP and MTX) |
| 6 |
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* |
| 7 |
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* External symbols declared in source.h |
| 8 |
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*/ |
| 9 |
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| 10 |
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#ifdef SSKIPOPT /* currently an optional compile */ |
| 11 |
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| 12 |
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#include "copyright.h" |
| 13 |
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| 14 |
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#include "platform.h" |
| 15 |
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#include "paths.h" |
| 16 |
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#include "ray.h" |
| 17 |
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#include "source.h" |
| 18 |
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#include "bmpfile.h" |
| 19 |
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#include "resolu.h" |
| 20 |
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| 21 |
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int sskip_dim[2] = {0,0}; /* source skip image size */ |
| 22 |
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| 23 |
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/* correction file types */ |
| 24 |
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enum {CFnone=0, CFfloatY, CFbmpY8}; |
| 25 |
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| 26 |
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/* struct for bitmap file loading */ |
| 27 |
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typedef struct skipbmp { |
| 28 |
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struct skipbmp *next; /* next in skip list */ |
| 29 |
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BMPReader *bmp; /* BMP file reader */ |
| 30 |
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uby8 *sfl; /* corresponding sources */ |
| 31 |
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char bname[1]; /* BMP file name */ |
| 32 |
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} SKIPBMP; |
| 33 |
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| 34 |
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/* holder for source exclusion images */ |
| 35 |
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struct { |
| 36 |
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SKIPBMP *sbmplist; /* list of BMP inputs */ |
| 37 |
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int cftype; /* correction file type */ |
| 38 |
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union { |
| 39 |
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struct { |
| 40 |
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int fd; |
| 41 |
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int dstart; |
| 42 |
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} Y; /* float Y input */ |
| 43 |
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BMPReader *bmp; /* BMP input pointer */ |
| 44 |
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} cf; /* correction file input */ |
| 45 |
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int *ndxmap; /* allocated index map */ |
| 46 |
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float *corrmap; /* allocated correction map */ |
| 47 |
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char cfname[MAXSTR]; /* correction file name */ |
| 48 |
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} skipin; /* just need the one */ |
| 49 |
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| 50 |
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/* call-back for matrix header line */ |
| 51 |
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static int |
| 52 |
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check_mtx(char *hl, void *p) |
| 53 |
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{ |
| 54 |
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int *dim = (int *)p; |
| 55 |
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char fmt[MAXFMTLEN]; |
| 56 |
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int rv; |
| 57 |
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| 58 |
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if ((rv = isbigendian(hl)) >= 0) { |
| 59 |
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if (rv != nativebigendian()) { |
| 60 |
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eputs("cannot handle byte-swapped data\n"); |
| 61 |
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return(-1); |
| 62 |
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} |
| 63 |
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return(1); |
| 64 |
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} |
| 65 |
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if (!strncmp(hl, "NCOLS=", 6)) { |
| 66 |
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dim[0] = atoi(hl+6); |
| 67 |
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if (dim[0] <= 0) |
| 68 |
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return(-1); |
| 69 |
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return(1); |
| 70 |
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} |
| 71 |
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if (!strncmp(hl, "NROWS=", 6)) { |
| 72 |
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dim[1] = atoi(hl+6); |
| 73 |
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if (dim[1] <= 0) |
| 74 |
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return(-1); |
| 75 |
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return(1); |
| 76 |
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} |
| 77 |
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if (isncomp(hl)) { |
| 78 |
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if (ncompval(hl) != 1) { |
| 79 |
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eputs("require single component\n"); |
| 80 |
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return(-1); |
| 81 |
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} |
| 82 |
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return(1); |
| 83 |
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} |
| 84 |
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if (formatval(fmt, hl)) { |
| 85 |
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if (strcmp(fmt, "float")) { |
| 86 |
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eputs("require binary float format\n"); |
| 87 |
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return(-1); |
| 88 |
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} |
| 89 |
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return(1); |
| 90 |
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} |
| 91 |
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return(0); |
| 92 |
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} |
| 93 |
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| 94 |
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/* private call to open floating-point matrix and check dimensions */ |
| 95 |
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static void |
| 96 |
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open_float_mtx() |
| 97 |
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{ |
| 98 |
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int mydim[2]; |
| 99 |
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FILE *fp; |
| 100 |
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| 101 |
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skipin.cf.Y.fd = open(skipin.cfname, O_RDONLY); |
| 102 |
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if (skipin.cf.Y.fd < 0) { |
| 103 |
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sprintf(errmsg, "cannot open matrix '%s'", skipin.cfname); |
| 104 |
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error(SYSTEM, errmsg); |
| 105 |
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} |
| 106 |
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SET_FD_BINARY(skipin.cf.Y.fd); /* get temporary FILE pointer */ |
| 107 |
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fp = fdopen(dup(skipin.cf.Y.fd), "rb"); |
| 108 |
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if (fp == NULL) |
| 109 |
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error(SYSTEM, "out of memory in open_float_mtx()"); |
| 110 |
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mydim[0] = mydim[1] = 0; /* check header format, etc. */ |
| 111 |
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if (getheader(fp, check_mtx, mydim) < 0) |
| 112 |
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goto badheader; |
| 113 |
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if (!mydim[0] | !mydim[1] && |
| 114 |
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!fscnresolu(&mydim[0], &mydim[1], fp)) |
| 115 |
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goto badheader; |
| 116 |
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if ((mydim[0] == sskip_dim[0]) & (mydim[1] == sskip_dim[1])) { |
| 117 |
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skipin.cf.Y.dstart = ftell(fp); |
| 118 |
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fclose(fp); |
| 119 |
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return; /* lookin' good! */ |
| 120 |
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} |
| 121 |
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badheader: |
| 122 |
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sprintf(errmsg, "incompatible header for matrix '%s'", skipin.cfname); |
| 123 |
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error(USER, errmsg); |
| 124 |
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fclose(fp); |
| 125 |
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} |
| 126 |
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| 127 |
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/* Open a set of bitmaps corresponding to loaded sources w/ corrections */ |
| 128 |
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int |
| 129 |
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srcskip_open(char *bmpspec, char *scorrimg) |
| 130 |
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{ |
| 131 |
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int bmcnt = 0; |
| 132 |
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char fname[MAXSTR]; |
| 133 |
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char *sfx; |
| 134 |
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int sn; |
| 135 |
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| 136 |
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srcskip_free_maps(); /* clear previous */ |
| 137 |
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srcskip_close(); |
| 138 |
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sskip_dim[0] = sskip_dim[1] = 0; |
| 139 |
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if (!nsources) { |
| 140 |
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sskip_rsi(NULL); |
| 141 |
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return(0); |
| 142 |
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} |
| 143 |
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if (bmpspec == NULL) |
| 144 |
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return(0); |
| 145 |
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if (strstr(bmpspec, "%s") == NULL) |
| 146 |
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error(USER, "missing '%s' in source skip BMP file spec"); |
| 147 |
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if (ssf_select == NULL) /* starting fresh? */ |
| 148 |
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ssf_select = sskip_new(); |
| 149 |
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if (scorrimg == NULL) /* no correction map? */ |
| 150 |
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skipin.cfname[0] = '\0'; |
| 151 |
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else |
| 152 |
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strcpy(skipin.cfname, scorrimg); |
| 153 |
|
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skipin.cftype = CFnone; /* open input BMPs */ |
| 154 |
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for (sn = 0; sn < nsources; sn++) { |
| 155 |
|
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OBJECT mod; |
| 156 |
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const char *modname; |
| 157 |
|
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SKIPBMP *sbmp; |
| 158 |
|
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int sn1; |
| 159 |
|
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if (source[sn].sflags & (SSKIP|SVIRTUAL) || |
| 160 |
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sskip_chk(ssf_select, sn)) |
| 161 |
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continue; |
| 162 |
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mod = source[sn].so->omod; |
| 163 |
|
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modname = objptr(mod)->oname; |
| 164 |
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sprintf(fname, bmpspec, modname); |
| 165 |
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if (access(fname, R_OK) < 0) |
| 166 |
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continue; /* none such input */ |
| 167 |
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/* else check it out */ |
| 168 |
|
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sbmp = (SKIPBMP *)emalloc(sizeof(SKIPBMP)+strlen(fname)); |
| 169 |
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strcpy(sbmp->bname, fname); |
| 170 |
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sbmp->bmp = BMPopenInputFile(fname); |
| 171 |
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if (sbmp->bmp == NULL) { |
| 172 |
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sprintf(errmsg, "cannot open bitmap '%s'", fname); |
| 173 |
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error(SYSTEM, errmsg); |
| 174 |
|
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} |
| 175 |
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if (sbmp->bmp->hdr->nColors > 2) { |
| 176 |
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sprintf(errmsg, "expected bilevel bitmap in '%s'", fname); |
| 177 |
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error(USER, errmsg); |
| 178 |
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} |
| 179 |
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if (!sbmp->bmp->hdr->yIsDown) { |
| 180 |
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sprintf(errmsg, "bad orientation for '%s'", fname); |
| 181 |
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error(INTERNAL, errmsg); |
| 182 |
|
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} |
| 183 |
|
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if (skipin.sbmplist == NULL) { |
| 184 |
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sskip_dim[0] = sbmp->bmp->hdr->width; |
| 185 |
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sskip_dim[1] = sbmp->bmp->hdr->height; |
| 186 |
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} else if ((sbmp->bmp->hdr->width != sskip_dim[0]) | |
| 187 |
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(sbmp->bmp->hdr->height != sskip_dim[1])) { |
| 188 |
|
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sprintf(errmsg, "dimensions do not match for '%s'", |
| 189 |
|
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fname); |
| 190 |
|
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error(USER, errmsg); |
| 191 |
|
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} |
| 192 |
|
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/* flag this light source */ |
| 193 |
|
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sbmp->sfl = sskip_new(); |
| 194 |
|
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sskip_set(sbmp->sfl, sn); |
| 195 |
|
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/* flag others w/ same modifier */ |
| 196 |
|
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for (sn1 = sn; ++sn1 < nsources; ) { |
| 197 |
|
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OBJECT mod1; |
| 198 |
|
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if (source[sn1].sflags & (SSKIP|SVIRTUAL) || |
| 199 |
|
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sskip_chk(ssf_select, sn1)) |
| 200 |
|
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continue; |
| 201 |
|
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mod1 = source[sn1].so->omod; |
| 202 |
|
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if (mod1 == mod || !strcmp(objptr(mod1)->oname, modname)) |
| 203 |
|
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sskip_set(sbmp->sfl, sn1); |
| 204 |
|
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} |
| 205 |
|
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sskip_addflags(ssf_select, sbmp->sfl); |
| 206 |
|
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sbmp->next = skipin.sbmplist; |
| 207 |
|
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skipin.sbmplist = sbmp; |
| 208 |
|
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bmcnt++; |
| 209 |
|
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} |
| 210 |
|
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if (!bmcnt) { |
| 211 |
|
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sprintf(errmsg, "no matching BMP input files for '%s'", bmpspec); |
| 212 |
|
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error(WARNING, errmsg); |
| 213 |
|
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return(0); |
| 214 |
|
|
} |
| 215 |
|
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if (!skipin.cfname[0]) /* no correction image? */ |
| 216 |
|
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return(bmcnt); |
| 217 |
|
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/* else open correction image */ |
| 218 |
|
|
sfx = skipin.cfname; /* find file type */ |
| 219 |
|
|
while (*sfx) sfx++; |
| 220 |
|
|
while (--sfx > skipin.cfname && !ISDIRSEP(*sfx)) |
| 221 |
|
|
if (*sfx == '.') { |
| 222 |
|
|
if (!strcasecmp(sfx, ".mtx")) |
| 223 |
|
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skipin.cftype = CFfloatY; |
| 224 |
|
|
else if (!strcasecmp(sfx, ".bmp")) |
| 225 |
|
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skipin.cftype = CFbmpY8; |
| 226 |
|
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break; |
| 227 |
|
|
} |
| 228 |
|
|
switch (skipin.cftype) { |
| 229 |
|
|
case CFfloatY: |
| 230 |
|
|
open_float_mtx(); |
| 231 |
|
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break; |
| 232 |
|
|
case CFbmpY8: |
| 233 |
|
|
skipin.cf.bmp = BMPopenInputFile(skipin.cfname); |
| 234 |
|
|
if (skipin.cf.bmp == NULL) { |
| 235 |
|
|
sprintf(errmsg, "cannot open image '%s'", skipin.cfname); |
| 236 |
|
|
error(SYSTEM, errmsg); |
| 237 |
|
|
} |
| 238 |
|
|
if (!skipin.cf.bmp->hdr->yIsDown | |
| 239 |
|
|
(skipin.cf.bmp->hdr->bpp != 8) | |
| 240 |
|
|
(skipin.cf.bmp->hdr->width != sskip_dim[0]) | |
| 241 |
|
|
(skipin.cf.bmp->hdr->height != sskip_dim[1])) { |
| 242 |
|
|
sprintf(errmsg, "bad type/size/orientation for '%s'", |
| 243 |
|
|
skipin.cfname); |
| 244 |
|
|
error(USER, errmsg); |
| 245 |
|
|
} |
| 246 |
|
|
break; |
| 247 |
|
|
case CFnone: |
| 248 |
|
|
sprintf(errmsg, "unsupported image type for '%s'", skipin.cfname); |
| 249 |
|
|
error(USER, errmsg); |
| 250 |
|
|
} |
| 251 |
|
|
return(bmcnt); /* ready to roll */ |
| 252 |
|
|
} |
| 253 |
|
|
|
| 254 |
|
|
/* private function to convert 8-bit to float correction multiplier */ |
| 255 |
|
|
static void |
| 256 |
|
|
srcskip_cvtY8(float *scorr, const uby8 *y8, int n) |
| 257 |
|
|
{ |
| 258 |
|
|
static float gamtab[256]; |
| 259 |
|
|
|
| 260 |
|
|
if (gamtab[0] < 0.5f) { /* initialize lookup */ |
| 261 |
|
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int i = 256; |
| 262 |
|
|
while (i--) |
| 263 |
|
|
gamtab[i] = 1./(1. - pow((i+.5)*(1./255.), 2.2)); |
| 264 |
|
|
} |
| 265 |
|
|
while (n-- > 0) |
| 266 |
|
|
*scorr++ = gamtab[*y8++]; |
| 267 |
|
|
} |
| 268 |
|
|
|
| 269 |
|
|
/* Read and convert the specified source skip scanline */ |
| 270 |
|
|
int |
| 271 |
|
|
srcskip_getrow(int row, int *sndx, float *scorr) |
| 272 |
|
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{ |
| 273 |
|
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int err; |
| 274 |
|
|
|
| 275 |
|
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if ((0 > row) | (row >= sskip_dim[1])) |
| 276 |
|
|
goto badargum; |
| 277 |
|
|
if (sndx != NULL) { /* read bitmap flags & convert? */ |
| 278 |
|
|
uby8 *scanflags; |
| 279 |
|
|
SKIPBMP *sbmp; |
| 280 |
|
|
int x; |
| 281 |
|
|
if (skipin.sbmplist == NULL) |
| 282 |
|
|
goto inpclosed; |
| 283 |
|
|
errno = 0; |
| 284 |
|
|
for (sbmp = skipin.sbmplist; sbmp != NULL; sbmp = sbmp->next) |
| 285 |
|
|
if ((err = BMPseekScanline(row, sbmp->bmp)) != BIR_OK) { |
| 286 |
|
|
sprintf(errmsg, "%s '%s'", |
| 287 |
|
|
BMPerrorMessage(err), sbmp->bname); |
| 288 |
|
|
error(SYSTEM, errmsg); |
| 289 |
|
|
} |
| 290 |
|
|
/* per-column source skip flags */ |
| 291 |
|
|
scanflags = (uby8 *)ecalloc(sskip_dim[0], SSKIPFLSIZ); |
| 292 |
|
|
for (sbmp = skipin.sbmplist; sbmp != NULL; sbmp = sbmp->next) { |
| 293 |
|
|
const uby8 *bscn = sbmp->bmp->scanline; |
| 294 |
|
|
for (x = 0; x < sskip_dim[0]; bscn += !(++x & 7)) |
| 295 |
|
|
if (!(*bscn & 0x80>>(x&7))) |
| 296 |
|
|
sskip_addflags(scanflags + x*SSKIPFLSIZ, |
| 297 |
|
|
sbmp->sfl); |
| 298 |
|
|
} |
| 299 |
|
|
/* convert to lookup indices */ |
| 300 |
|
|
for (x = sskip_dim[0]; x-- > 0; ) |
| 301 |
|
|
sndx[x] = sskip_rsi(scanflags + x*SSKIPFLSIZ); |
| 302 |
|
|
efree(scanflags); |
| 303 |
|
|
} |
| 304 |
|
|
if (scorr == NULL) /* all done? */ |
| 305 |
|
|
return(row); |
| 306 |
|
|
switch (skipin.cftype) { /* else read correction row */ |
| 307 |
|
|
case CFfloatY: |
| 308 |
|
|
if (skipin.cf.Y.fd < 0) |
| 309 |
|
|
goto inpclosed; |
| 310 |
|
|
if (pread(skipin.cf.Y.fd, scorr, sizeof(float)*sskip_dim[0], |
| 311 |
|
|
skipin.cf.Y.dstart + sizeof(float)*sskip_dim[0]*row) |
| 312 |
|
|
!= sizeof(float)*sskip_dim[0]) { |
| 313 |
|
|
sprintf(errmsg, "read error from '%s'", skipin.cfname); |
| 314 |
|
|
error(SYSTEM, errmsg); |
| 315 |
|
|
} |
| 316 |
|
|
return(row); |
| 317 |
|
|
case CFbmpY8: |
| 318 |
|
|
if (skipin.cf.bmp == NULL) |
| 319 |
|
|
goto inpclosed; |
| 320 |
|
|
err = BMPseekScanline(row, skipin.cf.bmp); |
| 321 |
|
|
if (err != BIR_OK) { |
| 322 |
|
|
sprintf(errmsg, "%s '%s'", |
| 323 |
|
|
BMPerrorMessage(err), skipin.cfname); |
| 324 |
|
|
error(SYSTEM, errmsg); |
| 325 |
|
|
} |
| 326 |
|
|
srcskip_cvtY8(scorr, skipin.cf.bmp->scanline, sskip_dim[0]); |
| 327 |
|
|
return(row); |
| 328 |
|
|
case CFnone: /* caller asking for missing input */ |
| 329 |
|
|
break; |
| 330 |
|
|
} |
| 331 |
|
|
inpclosed: |
| 332 |
|
|
error(CONSISTENCY, "call to srcskip_getrow() on closed input"); |
| 333 |
greg |
2.2 |
return(EOF); |
| 334 |
greg |
2.1 |
badargum: |
| 335 |
|
|
error(CONSISTENCY, "bad argument in srcskip_readrow()"); |
| 336 |
|
|
return(EOF); /* pro forma */ |
| 337 |
|
|
} |
| 338 |
|
|
|
| 339 |
|
|
/* Close input images and free memory (leaving any maps) */ |
| 340 |
|
|
void |
| 341 |
|
|
srcskip_close() |
| 342 |
|
|
{ |
| 343 |
|
|
while (skipin.sbmplist != NULL) { |
| 344 |
|
|
SKIPBMP *sbmp = skipin.sbmplist; |
| 345 |
|
|
skipin.sbmplist = sbmp->next; |
| 346 |
|
|
BMPcloseInput(sbmp->bmp); |
| 347 |
|
|
sskip_free(sbmp->sfl); |
| 348 |
|
|
efree(sbmp); |
| 349 |
|
|
} |
| 350 |
|
|
switch (skipin.cftype) { |
| 351 |
|
|
case CFfloatY: |
| 352 |
|
|
if (skipin.cf.Y.fd >= 0) { |
| 353 |
|
|
close(skipin.cf.Y.fd); |
| 354 |
|
|
skipin.cf.Y.fd = -1; |
| 355 |
|
|
} |
| 356 |
|
|
break; |
| 357 |
|
|
case CFbmpY8: |
| 358 |
|
|
if (skipin.cf.bmp != NULL) { |
| 359 |
|
|
BMPcloseInput(skipin.cf.bmp); |
| 360 |
|
|
skipin.cf.bmp = NULL; |
| 361 |
|
|
} |
| 362 |
|
|
break; |
| 363 |
|
|
} |
| 364 |
|
|
skipin.cfname[0] = '\0'; |
| 365 |
|
|
if (ssf_select == NULL) { /* freed lookup table already? */ |
| 366 |
|
|
srcskip_free_maps(); |
| 367 |
|
|
skipin.cftype = CFnone; |
| 368 |
|
|
sskip_dim[0] = sskip_dim[1] = 0; |
| 369 |
|
|
} |
| 370 |
|
|
} |
| 371 |
|
|
|
| 372 |
|
|
#if defined(_WIN32) || defined(_WIN64) |
| 373 |
|
|
|
| 374 |
|
|
/* Allocate and load entire source skip index array */ |
| 375 |
|
|
int * |
| 376 |
|
|
srcskip_ndxmap() |
| 377 |
|
|
{ |
| 378 |
|
|
int y; |
| 379 |
|
|
|
| 380 |
|
|
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 381 |
|
|
srcskip_free_maps(); |
| 382 |
|
|
return(NULL); |
| 383 |
|
|
} |
| 384 |
|
|
if (skipin.ndxmap != NULL) |
| 385 |
|
|
return(skipin.ndxmap); |
| 386 |
|
|
|
| 387 |
|
|
skipin.ndxmap = (int *)emalloc(sizeof(int) * |
| 388 |
|
|
sskip_dim[0]*sskip_dim[1]); |
| 389 |
|
|
|
| 390 |
|
|
for (y = 0; y < sskip_dim[1]; y++) |
| 391 |
|
|
srcskip_getrow(y, skipin.ndxmap + sskip_dim[0]*y, NULL); |
| 392 |
|
|
|
| 393 |
|
|
return(skipin.ndxmap); |
| 394 |
|
|
} |
| 395 |
|
|
|
| 396 |
|
|
/* Allocate and load entire source correction array */ |
| 397 |
|
|
float * |
| 398 |
|
|
srcskip_corrmap() |
| 399 |
|
|
{ |
| 400 |
|
|
int y; |
| 401 |
|
|
ssize_t nbytes; |
| 402 |
|
|
|
| 403 |
|
|
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 404 |
|
|
srcskip_free_maps(); |
| 405 |
|
|
return(NULL); |
| 406 |
|
|
} |
| 407 |
|
|
if (skipin.corrmap != NULL) |
| 408 |
|
|
return(skipin.corrmap); |
| 409 |
|
|
|
| 410 |
|
|
if (skipin.cftype == CFnone) |
| 411 |
|
|
return(NULL); |
| 412 |
|
|
|
| 413 |
|
|
nbytes = sizeof(float)*sskip_dim[0]*sskip_dim[1]; |
| 414 |
|
|
|
| 415 |
|
|
skipin.corrmap = (float *)emalloc(nbytes); |
| 416 |
|
|
|
| 417 |
|
|
switch (skipin.cftype) { |
| 418 |
|
|
case CFfloatY: |
| 419 |
|
|
if (pread(skipin.cf.Y.fd, skipin.corrmap, nbytes, |
| 420 |
|
|
skipin.cf.Y.dstart) != nbytes) { |
| 421 |
|
|
sprintf(errmsg, "read error from '%s'", skipin.cfname); |
| 422 |
|
|
error(SYSTEM, errmsg); |
| 423 |
|
|
} |
| 424 |
|
|
break; |
| 425 |
|
|
case CFbmpY8: |
| 426 |
|
|
for (y = 0; y < sskip_dim[1]; y++) |
| 427 |
|
|
srcskip_getrow(y, NULL, skipin.corrmap + sskip_dim[0]*y); |
| 428 |
|
|
break; |
| 429 |
|
|
} |
| 430 |
|
|
skipin.cref = 1; |
| 431 |
|
|
return(skipin.corrmap); |
| 432 |
|
|
} |
| 433 |
|
|
|
| 434 |
|
|
/* Free allocated memory for source skip index and correction maps */ |
| 435 |
|
|
void |
| 436 |
|
|
srcskip_free_maps() |
| 437 |
|
|
{ |
| 438 |
|
|
efree(skipin.ndxmap); skipin.ndxmap = NULL; |
| 439 |
|
|
efree(skipin.corrmap); skipin.corrmap = NULL; |
| 440 |
|
|
} |
| 441 |
|
|
|
| 442 |
|
|
#else /* ! Windows */ |
| 443 |
|
|
|
| 444 |
|
|
#include <sys/mman.h> /* mmap() support */ |
| 445 |
|
|
|
| 446 |
|
|
/* Create memory map with entire source skip index array */ |
| 447 |
|
|
int * |
| 448 |
|
|
srcskip_ndxmap() |
| 449 |
|
|
{ |
| 450 |
|
|
int y; |
| 451 |
|
|
|
| 452 |
|
|
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 453 |
|
|
srcskip_free_maps(); |
| 454 |
|
|
return(NULL); |
| 455 |
|
|
} |
| 456 |
|
|
if (skipin.ndxmap != NULL) |
| 457 |
|
|
return(skipin.ndxmap); |
| 458 |
|
|
|
| 459 |
|
|
skipin.ndxmap = (int *)mmap(NULL, sizeof(int)*sskip_dim[0]*sskip_dim[1], |
| 460 |
|
|
PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); |
| 461 |
|
|
|
| 462 |
|
|
if ((void *)skipin.ndxmap == MAP_FAILED) |
| 463 |
|
|
error(SYSTEM, "out of memory in srcskip_ndxmap()"); |
| 464 |
|
|
|
| 465 |
|
|
for (y = 0; y < sskip_dim[1]; y++) |
| 466 |
|
|
srcskip_getrow(y, skipin.ndxmap + sskip_dim[0]*y, NULL); |
| 467 |
|
|
|
| 468 |
|
|
return(skipin.ndxmap); |
| 469 |
|
|
} |
| 470 |
|
|
|
| 471 |
|
|
/* Create memory map with entire source skip correction array */ |
| 472 |
|
|
float * |
| 473 |
|
|
srcskip_corrmap() |
| 474 |
|
|
{ |
| 475 |
|
|
int y; |
| 476 |
|
|
ssize_t nbytes; |
| 477 |
|
|
|
| 478 |
|
|
if (ssf_select == NULL) { /* rug pulled from under us? */ |
| 479 |
|
|
srcskip_free_maps(); |
| 480 |
|
|
return(NULL); |
| 481 |
|
|
} |
| 482 |
|
|
if (skipin.corrmap != NULL) |
| 483 |
|
|
return(skipin.corrmap); |
| 484 |
|
|
|
| 485 |
|
|
if (skipin.cftype == CFnone) |
| 486 |
|
|
return(NULL); |
| 487 |
|
|
|
| 488 |
|
|
nbytes = sizeof(float)*sskip_dim[0]*sskip_dim[1]; |
| 489 |
|
|
|
| 490 |
|
|
if (skipin.cftype != CFfloatY || skipin.cf.Y.dstart % sizeof(float)) { |
| 491 |
|
|
skipin.corrmap = (float *)mmap(NULL, nbytes, |
| 492 |
|
|
PROT_READ|PROT_WRITE, |
| 493 |
|
|
MAP_ANON|MAP_PRIVATE, -1, 0); |
| 494 |
|
|
if ((void *)skipin.corrmap == MAP_FAILED) |
| 495 |
|
|
error(SYSTEM, "out of memory in srcskip_corrmap()"); |
| 496 |
|
|
} |
| 497 |
|
|
switch (skipin.cftype) { |
| 498 |
|
|
case CFfloatY: |
| 499 |
|
|
if (skipin.corrmap != NULL) { |
| 500 |
|
|
if (pread(skipin.cf.Y.fd, skipin.corrmap, nbytes, |
| 501 |
|
|
skipin.cf.Y.dstart) != nbytes) { |
| 502 |
|
|
sprintf(errmsg, "read error from '%s'", |
| 503 |
|
|
skipin.cfname); |
| 504 |
|
|
error(SYSTEM, errmsg); |
| 505 |
|
|
} |
| 506 |
|
|
break; /* best we could do */ |
| 507 |
|
|
} /* else map directly to file data */ |
| 508 |
|
|
skipin.corrmap = (float *)mmap(NULL, skipin.cf.Y.dstart + nbytes, |
| 509 |
|
|
PROT_READ|PROT_WRITE, |
| 510 |
|
|
MAP_FILE|MAP_PRIVATE, skipin.cf.Y.fd, 0); |
| 511 |
|
|
if ((void *)skipin.corrmap == MAP_FAILED) |
| 512 |
|
|
error(SYSTEM, "cannot map file in srcskip_corrmap()"); |
| 513 |
|
|
skipin.corrmap += skipin.cf.Y.dstart/sizeof(float); |
| 514 |
|
|
break; |
| 515 |
|
|
case CFbmpY8: |
| 516 |
|
|
for (y = 0; y < sskip_dim[1]; y++) |
| 517 |
|
|
srcskip_getrow(y, NULL, skipin.corrmap + sskip_dim[0]*y); |
| 518 |
|
|
break; |
| 519 |
|
|
} |
| 520 |
|
|
return(skipin.corrmap); |
| 521 |
|
|
} |
| 522 |
|
|
|
| 523 |
|
|
/* Unmap memory allocated for source skip index and correction arrays */ |
| 524 |
|
|
void |
| 525 |
|
|
srcskip_free_maps() |
| 526 |
|
|
{ |
| 527 |
|
|
if (skipin.ndxmap != NULL) { |
| 528 |
|
|
munmap(skipin.ndxmap, sizeof(int)*sskip_dim[0]*sskip_dim[1]); |
| 529 |
|
|
skipin.ndxmap = NULL; |
| 530 |
|
|
} |
| 531 |
|
|
if (skipin.corrmap != NULL) { |
| 532 |
|
|
off_t headlen = 0; |
| 533 |
|
|
if (skipin.cftype == CFfloatY && |
| 534 |
|
|
!(skipin.cf.Y.dstart % sizeof(float))) |
| 535 |
|
|
headlen = skipin.cf.Y.dstart; |
| 536 |
|
|
|
| 537 |
|
|
munmap((char *)skipin.corrmap - headlen, |
| 538 |
|
|
headlen + sizeof(float)*sskip_dim[0]*sskip_dim[1]); |
| 539 |
|
|
skipin.corrmap = NULL; |
| 540 |
|
|
} |
| 541 |
|
|
} |
| 542 |
|
|
|
| 543 |
|
|
#endif /* ! Windows */ |
| 544 |
|
|
#endif /* SSKIPOPT */ |
