int Tiff::GetField(uint32_t tag, ...)
{
va_list ap;
int status;
va_start(ap, tag);
status = TIFFVGetField(reinterpret_cast<TIFF *>(m_tiff),tag,ap);
va_end(ap);
return (status);
}
/*
* Like TIFFGetField, but return any default
* value if the tag is not present in the directory.
*
* NB: We use the value in the directory, rather than
* explcit values so that defaults exist only one
* place in the library -- in TIFFDefaultDirectory.
*/
int
TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
{
TIFFDirectory *td = &tif->tif_dir;
if (TIFFVGetField(tif, tag, ap))
return (1);
switch (tag) {
case TIFFTAG_SUBFILETYPE:
*va_arg(ap, uint32 *) = td->td_subfiletype;
return (1);
case TIFFTAG_BITSPERSAMPLE:
*va_arg(ap, uint16 *) = td->td_bitspersample;
return (1);
case TIFFTAG_THRESHHOLDING:
*va_arg(ap, uint16 *) = td->td_threshholding;
return (1);
case TIFFTAG_FILLORDER:
*va_arg(ap, uint16 *) = td->td_fillorder;
return (1);
case TIFFTAG_ORIENTATION:
*va_arg(ap, uint16 *) = td->td_orientation;
return (1);
case TIFFTAG_SAMPLESPERPIXEL:
*va_arg(ap, uint16 *) = td->td_samplesperpixel;
return (1);
case TIFFTAG_ROWSPERSTRIP:
*va_arg(ap, uint32 *) = td->td_rowsperstrip;
return (1);
case TIFFTAG_MINSAMPLEVALUE:
*va_arg(ap, uint16 *) = td->td_minsamplevalue;
return (1);
case TIFFTAG_MAXSAMPLEVALUE:
*va_arg(ap, uint16 *) = td->td_maxsamplevalue;
return (1);
case TIFFTAG_PLANARCONFIG:
*va_arg(ap, uint16 *) = td->td_planarconfig;
return (1);
case TIFFTAG_RESOLUTIONUNIT:
*va_arg(ap, uint16 *) = td->td_resolutionunit;
return (1);
case TIFFTAG_PREDICTOR:
{
TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
*va_arg(ap, uint16*) = (uint16) sp->predictor;
return 1;
}
case TIFFTAG_DOTRANGE:
*va_arg(ap, uint16 *) = 0;
*va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
return (1);
case TIFFTAG_INKSET:
*va_arg(ap, uint16 *) = INKSET_CMYK;
return 1;
case TIFFTAG_NUMBEROFINKS:
*va_arg(ap, uint16 *) = 4;
return (1);
case TIFFTAG_EXTRASAMPLES:
*va_arg(ap, uint16 *) = td->td_extrasamples;
*va_arg(ap, uint16 **) = td->td_sampleinfo;
return (1);
case TIFFTAG_MATTEING:
*va_arg(ap, uint16 *) =
(td->td_extrasamples == 1 &&
td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
return (1);
case TIFFTAG_TILEDEPTH:
*va_arg(ap, uint32 *) = td->td_tiledepth;
return (1);
case TIFFTAG_DATATYPE:
*va_arg(ap, uint16 *) = td->td_sampleformat-1;
return (1);
case TIFFTAG_SAMPLEFORMAT:
*va_arg(ap, uint16 *) = td->td_sampleformat;
return(1);
case TIFFTAG_IMAGEDEPTH:
*va_arg(ap, uint32 *) = td->td_imagedepth;
return (1);
case TIFFTAG_YCBCRCOEFFICIENTS:
{
/* defaults are from CCIR Recommendation 601-1 */
static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
*va_arg(ap, float **) = ycbcrcoeffs;
return 1;
}
case TIFFTAG_YCBCRSUBSAMPLING:
*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
return (1);
case TIFFTAG_YCBCRPOSITIONING:
*va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
return (1);
case TIFFTAG_WHITEPOINT:
{
static float whitepoint[2];
/* TIFF 6.0 specification tells that it is no default
value for the WhitePoint, but AdobePhotoshop TIFF
Technical Note tells that it should be CIE D50. */
whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
*va_arg(ap, float **) = whitepoint;
return 1;
}
case TIFFTAG_TRANSFERFUNCTION:
if (!td->td_transferfunction[0] &&
!TIFFDefaultTransferFunction(td)) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
return (0);
}
*va_arg(ap, uint16 **) = td->td_transferfunction[0];
if (td->td_samplesperpixel - td->td_extrasamples > 1) {
*va_arg(ap, uint16 **) = td->td_transferfunction[1];
*va_arg(ap, uint16 **) = td->td_transferfunction[2];
}
return (1);
case TIFFTAG_REFERENCEBLACKWHITE:
if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
return (0);
*va_arg(ap, float **) = td->td_refblackwhite;
return (1);
}
return 0;
}
/*
* Like TIFFGetField, but return any default
* value if the tag is not present in the directory.
*
* NB: We use the value in the directory, rather than
* explcit values so that defaults exist only one
* place in the library -- in TIFFDefaultDirectory.
*/
int
TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap)
{
TIFFDirectory *td = &tif->tif_dir;
if (TIFFVGetField(tif, tag, ap))
return (1);
switch (tag) {
case TIFFTAG_SUBFILETYPE:
*va_arg(ap, uint32 *) = td->td_subfiletype;
return (1);
case TIFFTAG_BITSPERSAMPLE:
*va_arg(ap, uint16 *) = td->td_bitspersample;
return (1);
case TIFFTAG_THRESHHOLDING:
*va_arg(ap, uint16 *) = td->td_threshholding;
return (1);
case TIFFTAG_FILLORDER:
*va_arg(ap, uint16 *) = td->td_fillorder;
return (1);
case TIFFTAG_ORIENTATION:
*va_arg(ap, uint16 *) = td->td_orientation;
return (1);
case TIFFTAG_SAMPLESPERPIXEL:
*va_arg(ap, uint16 *) = td->td_samplesperpixel;
return (1);
case TIFFTAG_ROWSPERSTRIP:
*va_arg(ap, uint32 *) = td->td_rowsperstrip;
return (1);
case TIFFTAG_MINSAMPLEVALUE:
*va_arg(ap, uint16 *) = td->td_minsamplevalue;
return (1);
case TIFFTAG_MAXSAMPLEVALUE:
*va_arg(ap, uint16 *) = td->td_maxsamplevalue;
return (1);
case TIFFTAG_PLANARCONFIG:
*va_arg(ap, uint16 *) = td->td_planarconfig;
return (1);
case TIFFTAG_RESOLUTIONUNIT:
*va_arg(ap, uint16 *) = td->td_resolutionunit;
return (1);
#ifdef CMYK_SUPPORT
case TIFFTAG_DOTRANGE:
*va_arg(ap, uint16 *) = 0;
*va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
return (1);
case TIFFTAG_INKSET:
*va_arg(ap, uint16 *) = td->td_inkset;
return (1);
case TIFFTAG_NUMBEROFINKS:
*va_arg(ap, uint16 *) = td->td_ninks;
return (1);
#endif
case TIFFTAG_EXTRASAMPLES:
*va_arg(ap, uint16 *) = td->td_extrasamples;
*va_arg(ap, uint16 **) = td->td_sampleinfo;
return (1);
case TIFFTAG_MATTEING:
*va_arg(ap, uint16 *) =
(td->td_extrasamples == 1 &&
td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
return (1);
case TIFFTAG_TILEDEPTH:
*va_arg(ap, uint32 *) = td->td_tiledepth;
return (1);
case TIFFTAG_DATATYPE:
*va_arg(ap, uint16 *) = td->td_sampleformat-1;
return (1);
case TIFFTAG_IMAGEDEPTH:
*va_arg(ap, uint32 *) = td->td_imagedepth;
return (1);
#ifdef YCBCR_SUPPORT
case TIFFTAG_YCBCRCOEFFICIENTS:
if (!td->td_ycbcrcoeffs) {
td->td_ycbcrcoeffs = (float *)
_TIFFmalloc(3*sizeof (float));
/* defaults are from CCIR Recommendation 601-1 */
td->td_ycbcrcoeffs[0] = 0.299f;
td->td_ycbcrcoeffs[1] = 0.587f;
td->td_ycbcrcoeffs[2] = 0.114f;
}
*va_arg(ap, float **) = td->td_ycbcrcoeffs;
return (1);
case TIFFTAG_YCBCRSUBSAMPLING:
*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
*va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
return (1);
case TIFFTAG_YCBCRPOSITIONING:
*va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
return (1);
#endif
#ifdef COLORIMETRY_SUPPORT
case TIFFTAG_TRANSFERFUNCTION:
if (!td->td_transferfunction[0])
TIFFDefaultTransferFunction(td);
*va_arg(ap, uint16 **) = td->td_transferfunction[0];
if (td->td_samplesperpixel - td->td_extrasamples > 1) {
*va_arg(ap, uint16 **) = td->td_transferfunction[1];
*va_arg(ap, uint16 **) = td->td_transferfunction[2];
}
return (1);
case TIFFTAG_REFERENCEBLACKWHITE:
if (!td->td_refblackwhite)
TIFFDefaultRefBlackWhite(td);
*va_arg(ap, float **) = td->td_refblackwhite;
return (1);
#endif
}
return (0);
}