/**
* vips_check_uint:
* @domain: the originating domain for the error message
* @im: image to check
*
* Check that the image is in one of the unsigned integer formats.
* Otherwise set an error message
* and return non-zero.
*
* See also: vips_error().
*
* Returns: 0 if OK, -1 otherwise.
*/
int
vips_check_uint( const char *domain, VipsImage *im )
{
if( !vips_band_format_isuint( im->BandFmt ) ) {
vips_error( domain,
"%s", _( "image must be unsigned integer" ) );
return( -1 );
}
return( 0 );
}
static int
vips_abs_build( VipsObject *object )
{
VipsUnary *unary = (VipsUnary *) object;
if( unary->in &&
vips_band_format_isuint( unary->in->BandFmt ) )
return( vips_unary_copy( unary ) );
if( VIPS_OBJECT_CLASS( vips_abs_parent_class )->build( object ) )
return( -1 );
return( 0 );
}
/* Write a TIFF header. width and height are the size of the VipsImage we are
* writing (it may have been shrunk).
*/
static int
write_tiff_header( Write *write, Layer *layer )
{
TIFF *tif = layer->tif;
int format;
int orientation;
/* Output base header fields.
*/
TIFFSetField( tif, TIFFTAG_IMAGEWIDTH, layer->width );
TIFFSetField( tif, TIFFTAG_IMAGELENGTH, layer->height );
TIFFSetField( tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG );
TIFFSetField( tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT );
TIFFSetField( tif, TIFFTAG_COMPRESSION, write->compression );
if( write->compression == COMPRESSION_JPEG )
TIFFSetField( tif, TIFFTAG_JPEGQUALITY, write->jpqual );
if( write->predictor != VIPS_FOREIGN_TIFF_PREDICTOR_NONE )
TIFFSetField( tif, TIFFTAG_PREDICTOR, write->predictor );
/* Don't write mad resolutions (eg. zero), it confuses some programs.
*/
TIFFSetField( tif, TIFFTAG_RESOLUTIONUNIT, write->resunit );
TIFFSetField( tif, TIFFTAG_XRESOLUTION,
VIPS_FCLIP( 0.01, write->xres, 1000000 ) );
TIFFSetField( tif, TIFFTAG_YRESOLUTION,
VIPS_FCLIP( 0.01, write->yres, 1000000 ) );
if( !write->strip )
if( write_embed_profile( write, tif ) ||
write_embed_xmp( write, tif ) ||
write_embed_ipct( write, tif ) ||
write_embed_photoshop( write, tif ) ||
write_embed_imagedescription( write, tif ) )
return( -1 );
if( vips_image_get_typeof( write->im, VIPS_META_ORIENTATION ) &&
!vips_image_get_int( write->im,
VIPS_META_ORIENTATION, &orientation ) )
TIFFSetField( tif, TIFFTAG_ORIENTATION, orientation );
/* And colour fields.
*/
if( write->im->Coding == VIPS_CODING_LABQ ) {
TIFFSetField( tif, TIFFTAG_SAMPLESPERPIXEL, 3 );
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE, 8 );
TIFFSetField( tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_CIELAB );
}
else if( write->onebit ) {
TIFFSetField( tif, TIFFTAG_SAMPLESPERPIXEL, 1 );
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE, 1 );
TIFFSetField( tif, TIFFTAG_PHOTOMETRIC,
write->miniswhite ?
PHOTOMETRIC_MINISWHITE :
PHOTOMETRIC_MINISBLACK );
}
else {
int photometric;
/* Number of bands that have colour in .. other bands are saved
* as alpha.
*/
int colour_bands;
int alpha_bands;
TIFFSetField( tif, TIFFTAG_SAMPLESPERPIXEL, write->im->Bands );
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE,
vips_format_sizeof( write->im->BandFmt ) << 3 );
if( write->im->Bands < 3 ) {
/* Mono or mono + alpha.
*/
photometric = write->miniswhite ?
PHOTOMETRIC_MINISWHITE :
PHOTOMETRIC_MINISBLACK;
colour_bands = 1;
}
else {
/* Could be: RGB, CMYK, LAB, perhaps with extra alpha.
*/
if( write->im->Type == VIPS_INTERPRETATION_LAB ||
write->im->Type == VIPS_INTERPRETATION_LABS ) {
photometric = PHOTOMETRIC_CIELAB;
colour_bands = 3;
}
else if( write->im->Type == VIPS_INTERPRETATION_CMYK &&
write->im->Bands >= 4 ) {
photometric = PHOTOMETRIC_SEPARATED;
TIFFSetField( tif,
TIFFTAG_INKSET, INKSET_CMYK );
colour_bands = 4;
}
else if( write->compression == COMPRESSION_JPEG &&
write->im->Bands == 3 &&
write->im->BandFmt == VIPS_FORMAT_UCHAR &&
(!write->rgbjpeg && write->jpqual < 90) ) {
/* This signals to libjpeg that it can do
* YCbCr chrominance subsampling from RGB, not
* that we will supply the image as YCbCr.
*/
photometric = PHOTOMETRIC_YCBCR;
TIFFSetField( tif, TIFFTAG_JPEGCOLORMODE,
JPEGCOLORMODE_RGB );
colour_bands = 3;
}
else {
/* Some kind of generic multi-band image ..
* save the first three bands as RGB, the rest
* as alpha.
*/
photometric = PHOTOMETRIC_RGB;
colour_bands = 3;
}
}
alpha_bands = VIPS_CLIP( 0,
write->im->Bands - colour_bands, MAX_ALPHA );
if( alpha_bands > 0 ) {
uint16 v[MAX_ALPHA];
int i;
/* EXTRASAMPLE_UNASSALPHA means generic extra
* alpha-like channels. ASSOCALPHA means pre-multipled
* alpha only.
*/
for( i = 0; i < alpha_bands; i++ )
v[i] = EXTRASAMPLE_UNASSALPHA;
TIFFSetField( tif,
TIFFTAG_EXTRASAMPLES, alpha_bands, v );
}
TIFFSetField( tif, TIFFTAG_PHOTOMETRIC, photometric );
}
/* Layout.
*/
if( write->tile ) {
TIFFSetField( tif, TIFFTAG_TILEWIDTH, write->tilew );
TIFFSetField( tif, TIFFTAG_TILELENGTH, write->tileh );
}
else
TIFFSetField( tif, TIFFTAG_ROWSPERSTRIP, write->tileh );
if( layer->above )
/* Pyramid layer.
*/
TIFFSetField( tif, TIFFTAG_SUBFILETYPE, FILETYPE_REDUCEDIMAGE );
/* Sample format.
*/
format = SAMPLEFORMAT_UINT;
if( vips_band_format_isuint( write->im->BandFmt ) )
format = SAMPLEFORMAT_UINT;
else if( vips_band_format_isint( write->im->BandFmt ) )
format = SAMPLEFORMAT_INT;
else if( vips_band_format_isfloat( write->im->BandFmt ) )
format = SAMPLEFORMAT_IEEEFP;
else if( vips_band_format_iscomplex( write->im->BandFmt ) )
format = SAMPLEFORMAT_COMPLEXIEEEFP;
TIFFSetField( tif, TIFFTAG_SAMPLEFORMAT, format );
return( 0 );
}
