fix thumbnail with cmyk output
see https://github.com/libvips/php-vips/issues/138 thanks AdamGaskins
This commit is contained in:
John Cupitt
parent
68a8bf42a7
commit
f0eb493643
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@ -1,5 +1,6 @@
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26/11/21 started 8.12.3
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- better arg checking for hist_find_ndim [travisbell]
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- fix thumbnail with CMYK output [AdamGaskins]
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26/11/21 started 8.12.2
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- make exif resuint optional and default to inch
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@ -649,11 +649,6 @@ vips_thumbnail_build( VipsObject *object )
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*/
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gboolean have_imported;
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/* If we shrink in linear space, we need to return to the input
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* colourspace after the shrink.
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*/
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VipsInterpretation input_interpretation;
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/* The format we need to revert to after unpremultiply.
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*/
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VipsBandFormat unpremultiplied_format;
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@ -701,10 +696,6 @@ vips_thumbnail_build( VipsObject *object )
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in = t[12];
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}
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/* Note the interpretation we will revert to after linear.
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*/
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input_interpretation = in->Type;
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/* In linear mode, we need to transform to a linear space before
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* vips_resize().
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*/
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@ -792,7 +783,7 @@ vips_thumbnail_build( VipsObject *object )
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/* vips_premultiply() makes a float image, so when we unpremultiply
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* below we must cast back to the original format. Use NOTSET to
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* meran no pre/unmultiply.
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* mean no pre/unmultiply.
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*/
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unpremultiplied_format = VIPS_FORMAT_NOTSET;
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@ -841,75 +832,51 @@ vips_thumbnail_build( VipsObject *object )
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/* Colour management.
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*/
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if( have_imported ) {
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/* We've already imported, just export. Go to sRGB if there's
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* no export profile.
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if( have_imported ) {
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/* We are in PCS. Export with the output profile, if any (this
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* will export with the embedded input profile if there's no
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* export profile).
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*/
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if( thumbnail->export_profile ||
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vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ) {
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g_info( "exporting to device space with a profile" );
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if( vips_icc_export( in, &t[7],
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"output_profile", thumbnail->export_profile,
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"intent", thumbnail->intent,
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NULL ) )
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return( -1 );
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in = t[7];
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}
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else {
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g_info( "converting to sRGB" );
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if( vips_colourspace( in, &t[7],
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VIPS_INTERPRETATION_sRGB, NULL ) )
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return( -1 );
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in = t[7];
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}
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g_info( "exporting to device space with a profile" );
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if( vips_icc_export( in, &t[7],
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"output_profile", thumbnail->export_profile,
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"intent", thumbnail->intent,
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NULL ) )
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return( -1 );
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in = t[7];
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}
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else if( thumbnail->export_profile ) {
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/* Not imported, but we are doing colour management. Transform
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* to the output space.
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/* We are in one of the resize space (sRGB, scRGB, B_W, GREY16,
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* etc.) and we have an export profile. Go to PCS, then export.
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*/
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g_info( "transforming to %s", thumbnail->export_profile );
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/* If there's some kind of import profile, we can transform to
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* the output. Otherwise we have to convert to PCS and then
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* export.
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*/
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if( thumbnail->import_profile ||
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(vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ||
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thumbnail->import_profile) ) {
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g_info( "transforming with supplied profiles" );
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if( vips_icc_transform( in, &t[7],
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thumbnail->export_profile,
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"input_profile", thumbnail->import_profile,
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"intent", thumbnail->intent,
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"embedded", TRUE,
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NULL ) )
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return( -1 );
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in = t[7];
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}
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else {
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g_info( "exporting with %s",
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thumbnail->export_profile );
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if( vips_colourspace( in, &t[7],
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VIPS_INTERPRETATION_XYZ, NULL ) ||
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vips_icc_export( t[7], &t[10],
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"output_profile",
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thumbnail->export_profile,
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"intent", thumbnail->intent,
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NULL ) )
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return( -1 );
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in = t[10];
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}
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}
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else if( thumbnail->linear ) {
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/* Linear mode, no colour management. We went to scRGB for
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* processing, so we now revert to the input colourspace.
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*/
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g_info( "reverting to input space %s",
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vips_enum_nick( VIPS_TYPE_INTERPRETATION,
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input_interpretation ) );
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g_info( "exporting with %s",
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thumbnail->export_profile );
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if( vips_colourspace( in, &t[7],
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input_interpretation, NULL ) )
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VIPS_INTERPRETATION_XYZ, NULL ) ||
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vips_icc_export( t[7], &t[10],
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"output_profile",
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thumbnail->export_profile,
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"intent", thumbnail->intent,
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NULL ) )
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return( -1 );
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in = t[10];
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}
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else {
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/* We are in one of the resize spaces and there's no export
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* profile. Output to sRGB or B_W
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*/
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VipsInterpretation interpretation;
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if( in->Bands < 3 )
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interpretation = VIPS_INTERPRETATION_B_W;
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else
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interpretation = VIPS_INTERPRETATION_sRGB;
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g_info( "converting to output space %s",
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vips_enum_nick( VIPS_TYPE_INTERPRETATION,
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interpretation ) );
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if( vips_colourspace( in, &t[7], interpretation,
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NULL ) )
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return( -1 );
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in = t[7];
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}
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@ -13,7 +13,7 @@
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echo building test image ...
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$vips extract_band $image $tmp/t1.v 1
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$vips linear $tmp/t1.v $tmp/t2.v 1 20 --uchar
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$vips replicate $tmp/t2.v $tmp/t1.v 2 2
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$vips replicate $tmp/t2.v $tmp/t1.v 4 4
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$vips crop $tmp/t1.v $tmp/t2.v 10 10 1000 1000
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# is a difference beyond a threshold? return 0 (meaning all ok) or 1 (meaning
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