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gwlarson |
3.1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */
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#ifndef lint
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static char SCCSid[] = "$SunId$ SGI";
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#endif
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/*
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* Perform tone mapping on TIFF input.
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*/
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#include <stdio.h>
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#include "tiffio.h"
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#include "tmprivat.h"
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int
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tmLoadTIFF(lpp, cpp, xp, yp, fname, tp) /* load and convert TIFF */
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TMbright **lpp;
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BYTE **cpp;
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int *xp, *yp;
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char *fname;
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TIFF *tp;
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{
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char *funcName = fname==NULL ? "tmLoadTIFF" : fname;
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TIFF *tif;
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int err;
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union {uint16 *w; uint32 *l; MEM_PTR p} sl;
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uint16 comp, phot, pconf;
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uint32 width, height;
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double stonits;
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int y;
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/* check arguments */
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if (tmTop == NULL)
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returnErr(TM_E_TMINVAL);
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if (lpp == NULL | xp == NULL | yp == NULL |
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(fname == NULL & tp == NULL))
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returnErr(TM_E_ILLEGAL);
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/* check/get TIFF tags */
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sl.p = NULL; *lpp = NULL;
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if (cpp != TM_NOCHROMP) *cpp = TM_NOCHROM;
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err = TM_E_BADFILE;
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if ((tif = tp) == NULL && (tif = TIFFOpen(fname, "r")) == NULL)
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returnErr(TM_E_BADFILE);
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TIFFGetFieldDefaulted(tif, TIFFTAG_PHOTOMETRIC, &phot);
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TIFFGetFieldDefaulted(tif, TIFFTAG_COMPRESSION, &comp);
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if (!TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width) ||
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!TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height))
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goto done;
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*xp = width; *yp = height;
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TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG, &pconf);
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if (pconf != PLANARCONFIG_CONTIG)
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goto done;
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if (!TIFFGetField(tif, TIFFTAG_STONITS, &stonits))
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stonits = 1.;
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if (phot == PHOTOMETRIC_LOGLUV) {
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if (comp != COMPRESSION_SGILOG && comp != COMPRESSION_SGILOG24)
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goto done;
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TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_RAW);
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sl.l = (uint32 *)malloc(width*sizeof(uint32));
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if (cpp != TM_NOCHROMP) {
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*cpp = (BYTE *)malloc(width*height*3*sizeof(BYTE));
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if (*cpp == NULL) {
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err = TM_E_NOMEM;
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goto done;
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}
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}
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} else if (phot == PHOTOMETRIC_LOGL) {
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if (comp != COMPRESSION_SGILOG)
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goto done;
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TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_16BIT);
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sl.w = (uint16 *)malloc(width*sizeof(uint16));
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} else
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goto done;
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*lpp = (TMbright *)malloc(width*height*sizeof(TMbright));
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if (sl.p == NULL | *lpp == NULL) {
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err = TM_E_NOMEM;
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goto done;
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}
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/* set input color space */
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tmSetSpace(TM_XYZPRIM, stonits);
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/* read and convert each scanline */
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for (y = 0; y < height; y++) {
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if (TIFFReadScanline(tif, sl.p, y, 0) < 0) {
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err = TM_E_BADFILE;
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break;
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}
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if (phot == PHOTOMETRIC_LOGL)
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err = tmCvL16(*lpp + y*width, sl.w, width);
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else if (comp == COMPRESSION_SGILOG24)
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err = tmCvLuv24(*lpp + y*width,
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cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp+y*3*width,
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sl.l, width);
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else
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err = tmCvLuv32(*lpp + y*width,
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cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp+y*3*width,
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sl.l, width);
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if (err != TM_E_OK)
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break;
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}
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done: /* clean up */
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if (tp == NULL)
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TIFFClose(tif);
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if (sl.p != NULL)
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free(sl.p);
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if (err != TM_E_OK) { /* free buffers on error */
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if (*lpp != NULL)
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free((MEM_PTR)*lpp);
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*lpp = NULL;
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if (cpp != TM_NOCHROMP) {
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if (*cpp != TM_NOCHROM)
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free((MEM_PTR)*cpp);
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*cpp = NULL;
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}
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*xp = *yp = 0;
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returnErr(err);
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}
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returnOK;
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}
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/*
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* Load and tone-map a SGILOG TIFF.
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* Beware of greyscale input -- you must check the PHOTOMETRIC tag to
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* determine that the returned array contains only grey values, not RGB.
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* As in tmMapPicture(), grey values are also returned if flags&TM_F_BW.
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*/
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int
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tmMapTIFF(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, tp)
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BYTE **psp;
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int *xp, *yp;
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int flags;
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RGBPRIMP monpri;
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double gamval, Lddyn, Ldmax;
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char *fname;
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TIFF *tp;
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{
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char *funcName = fname==NULL ? "tmMapTIFF" : fname;
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TMbright *lp;
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BYTE *cp;
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int err;
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/* check arguments */
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if (psp == NULL | xp == NULL | yp == NULL | monpri == NULL |
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(fname == NULL & tp == NULL))
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returnErr(TM_E_ILLEGAL);
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if (gamval < MINGAM) gamval = DEFGAM;
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if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
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if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
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if (flags & TM_F_BW) monpri = stdprims;
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/* initialize tone mapping */
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if (tmInit(flags, monpri, gamval) == NULL)
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returnErr(TM_E_NOMEM);
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/* load and convert TIFF */
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cp = TM_NOCHROM;
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err = tmLoadTIFF(&lp, flags&TM_F_BW ? TM_NOCHROMP : &cp,
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xp, yp, fname, tp);
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if (err != TM_E_OK) {
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tmDone(NULL);
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return(err);
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}
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if (cp == TM_NOCHROM) {
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*psp = (BYTE *)malloc(*xp * *yp * sizeof(BYTE));
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if (*psp == NULL) {
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free((MEM_PTR)lp);
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tmDone(NULL);
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returnErr(TM_E_NOMEM);
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}
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} else
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*psp = cp;
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/* compute color mapping */
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err = tmAddHisto(lp, *xp * *yp, 1);
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if (err != TM_E_OK)
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goto done;
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err = tmComputeMapping(gamval, Lddyn, Ldmax);
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if (err != TM_E_OK)
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goto done;
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/* map pixels */
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err = tmMapPixels(*psp, lp, cp, *xp * *yp);
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done: /* clean up */
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free((MEM_PTR)lp);
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tmDone(NULL);
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if (err != TM_E_OK) { /* free memory on error */
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free((MEM_PTR)*psp);
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*psp = NULL;
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*xp = *yp = 0;
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returnErr(err);
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}
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returnOK;
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}
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