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use Type/Interpretation for using the format when saving

This commit is contained in:
Angel Sánchez 2019-11-19 11:26:34 +01:00
parent fa0514a4d4
commit dd79cfd89d
1 changed files with 42 additions and 46 deletions
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88
libvips/foreign/vips2tiff.c
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@ -654,56 +654,52 @@ wtiff_write_header( Wtiff *wtiff, Layer *layer )
TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE, TIFFSetField( tif, TIFFTAG_BITSPERSAMPLE,
vips_format_sizeof( wtiff->im->BandFmt ) << 3 ); vips_format_sizeof( wtiff->im->BandFmt ) << 3 );
if( wtiff->im->Bands < 3 ) { if (wtiff->im->Type == VIPS_INTERPRETATION_B_W ||
/* Mono or mono + alpha. wtiff->im->Type == VIPS_INTERPRETATION_GREY16) {
*/ // Mono or mono + alpha.
photometric = wtiff->miniswhite ? photometric = wtiff->miniswhite ?
PHOTOMETRIC_MINISWHITE : PHOTOMETRIC_MINISWHITE :
PHOTOMETRIC_MINISBLACK; PHOTOMETRIC_MINISBLACK;
colour_bands = 1; colour_bands = 1;
} }
else if( wtiff->im->Type == VIPS_INTERPRETATION_LAB ||
wtiff->im->Type == VIPS_INTERPRETATION_LABS ) {
photometric = PHOTOMETRIC_CIELAB;
colour_bands = 3;
}
else if( wtiff->im->Type == VIPS_INTERPRETATION_CMYK &&
wtiff->im->Bands >= 4 ) {
photometric = PHOTOMETRIC_SEPARATED;
TIFFSetField( tif,
TIFFTAG_INKSET, INKSET_CMYK );
colour_bands = 4;
}
else if (wtiff->im->Type == VIPS_INTERPRETATION_MULTIBAND ) {
photometric = PHOTOMETRIC_SEPARATED;
TIFFSetField(tif,
TIFFTAG_INKSET, INKSET_MULTIINK);
colour_bands = 4;
}
else if( wtiff->compression == COMPRESSION_JPEG &&
wtiff->im->Bands == 3 &&
wtiff->im->BandFmt == VIPS_FORMAT_UCHAR &&
(!wtiff->rgbjpeg && wtiff->Q < 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 { else {
/* Could be: RGB, CMYK, LAB, perhaps with extra alpha. /* Some kind of generic multi-band image ..
*/ * save the first three bands as RGB, the rest
if( wtiff->im->Type == VIPS_INTERPRETATION_LAB || * as alpha.
wtiff->im->Type == VIPS_INTERPRETATION_LABS ) { */
photometric = PHOTOMETRIC_CIELAB; photometric = PHOTOMETRIC_RGB;
colour_bands = 3; colour_bands = 3;
}
else if( wtiff->im->Type == VIPS_INTERPRETATION_CMYK &&
wtiff->im->Bands >= 4 ) {
photometric = PHOTOMETRIC_SEPARATED;
TIFFSetField( tif,
TIFFTAG_INKSET, INKSET_CMYK );
colour_bands = 4;
}
else if (wtiff->im->Type == VIPS_INTERPRETATION_MULTIBAND ) {
photometric = PHOTOMETRIC_SEPARATED;
TIFFSetField(tif,
TIFFTAG_INKSET, INKSET_MULTIINK);
colour_bands = 4;
}
else if( wtiff->compression == COMPRESSION_JPEG &&
wtiff->im->Bands == 3 &&
wtiff->im->BandFmt == VIPS_FORMAT_UCHAR &&
(!wtiff->rgbjpeg && wtiff->Q < 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, alpha_bands = VIPS_CLIP( 0,