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  • Committer: Bazaar Package Importer
  • Author(s): Jay Berkenbilt
  • Date: 2010-06-18 21:28:11 UTC
  • mfrom: (10.1.1 sid)
  • Revision ID: james.westby@ubuntu.com-20100618212811-3t5mffcr8gpfpuel
Tags: 3.9.4-1
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libtiff/tif_aux.c
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/* $Id: tif_aux.c,v 1.20 2006/06/08 14:24:13 dron Exp $ */
 
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/* $Id: tif_aux.c,v 1.20.2.3 2010-06-09 21:15:27 bfriesen Exp $ */
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/*
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 * Copyright (c) 1991-1997 Sam Leffler
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        if (cp == NULL)
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                TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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                             "No space %s", what);
 
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                             "Failed to allocate memory for %s "
 
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                             "(%ld elements of %ld bytes each)",
 
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                             what,(long) nmemb, (long) elem_size);
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        return cp;
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}
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        return 0;
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}
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static int
 
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TIFFDefaultRefBlackWhite(TIFFDirectory* td)
 
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{
 
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        int i;
 
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        if (!(td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float))))
 
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                return 0;
 
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        if (td->td_photometric == PHOTOMETRIC_YCBCR) {
 
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                /*
 
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                 * YCbCr (Class Y) images must have the ReferenceBlackWhite
 
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                 * tag set. Fix the broken images, which lacks that tag.
 
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                 */
 
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                td->td_refblackwhite[0] = 0.0F;
 
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                td->td_refblackwhite[1] = td->td_refblackwhite[3] =
 
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                        td->td_refblackwhite[5] = 255.0F;
 
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                td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
 
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        } else {
 
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                /*
 
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                 * Assume RGB (Class R)
 
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                 */
 
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                for (i = 0; i < 3; i++) {
 
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                    td->td_refblackwhite[2*i+0] = 0;
 
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                    td->td_refblackwhite[2*i+1] =
 
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                            (float)((1L<<td->td_bitspersample)-1L);
 
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                }
 
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        }
 
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        return 1;
 
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}
 
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/*
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 * Like TIFFGetField, but return any default
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 * value if the tag is not present in the directory.
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                }
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                return (1);
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        case TIFFTAG_REFERENCEBLACKWHITE:
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                {
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                        int i;
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                        static float ycbcr_refblackwhite[] = 
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                        { 0.0F, 255.0F, 128.0F, 255.0F, 128.0F, 255.0F };
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                        static float rgb_refblackwhite[6];
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                        for (i = 0; i < 3; i++) {
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                                rgb_refblackwhite[2 * i + 0] = 0.0F;
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                                rgb_refblackwhite[2 * i + 1] =
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                                        (float)((1L<<td->td_bitspersample)-1L);
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                        }
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                        if (td->td_photometric == PHOTOMETRIC_YCBCR) {
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                                /*
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                                 * YCbCr (Class Y) images must have the
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                                 * ReferenceBlackWhite tag set. Fix the
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                                 * broken images, which lacks that tag.
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                                 */
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                                *va_arg(ap, float **) = ycbcr_refblackwhite;
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                        } else {
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                                /*
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                                 * Assume RGB (Class R)
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                                 */
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                                *va_arg(ap, float **) = rgb_refblackwhite;
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                        }
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                        return 1;
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                }
 
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                if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
 
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                        return (0);
 
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                *va_arg(ap, float **) = td->td_refblackwhite;
 
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                return (1);
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        }
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        return 0;
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}
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}
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/* vim: set ts=8 sts=8 sw=8 noet: */
 
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/*
 
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 * Local Variables:
 
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 * mode: c
 
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 * c-basic-offset: 8
 
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 * fill-column: 78
 
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 * End:
 
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 */