sergiotarxz/libvips
sergiotarxz/libvips
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This commit is contained in:
John Cupitt 2019-07-29 09:56:22 +01:00
parent 1220cc9667
commit 6078ba744c
1 changed files with 42 additions and 3 deletions
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45
libvips/histogram/mapimage.c
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@ -117,7 +117,12 @@ vips_mapimage_build( VipsObject *object )
VipsImage **t = (VipsImage **) vips_object_local_array( object, 2 );
VipsImage *in;
VipsImage *lut;
VipsImage **lut;
int n;
VipsImage **decode;
VipsImage **format;
VipsImage **band;
VipsImage **size;
int i;
g_object_set( object, "out", vips_image_new(), NULL );
@ -125,12 +130,46 @@ vips_mapimage_build( VipsObject *object )
if( VIPS_OBJECT_CLASS( vips_mapimage_parent_class )->build( object ) )
return( -1 );
/* Cast @in to u8/u16/u32 to make the index image.
in = mapimage->in;
lut = vips_area_get_data( &mapimage->lut.area, NULL, &n, NULL, NULL );
if( n > 256 ) {
vips_error( class->nickname, _( "LUT too large" ) );
return( -1 );
}
if( in->Bands > 1 ) {
vips_error( class->nickname, _( "index image not 1-band" ) );
return( -1 );
}
/* Cast @in to u8 to make the index image.
*/
if( vips_cast( in, &t[0], bandfmt_mapimage[in->BandFmt], NULL ) )
if( vips_cast( in, &t[0], VIPS_FORMAT_UCHAR, NULL ) )
return( -1 );
in = t[0];
decode = (VipsImage **) vips_object_local_array( object, n );
format = (VipsImage **) vips_object_local_array( object, n );
band = (VipsImage **) vips_object_local_array( object, n );
size = (VipsImage **) vips_object_local_array( object, n );
/* Decode RAD/LABQ etc.
*/
for( i = 0; i < arithmetic->n; i++ )
if( vips_image_decode( lut[i], &decode[i] ) )
return( -1 );
lut = decode;
/* LUT images must match in format, size and bands.
*/
if( vips__formatalike_vec( lut, format, n ) ||
vips__bandalike_vec( class->nickname, format, band, n, max_bands ) ||
vips__sizealike_vec( band, size, n ) )
return( -1 );
if( vips_check_uncoded( class->nickname, in ) ||
vips_check_bands_1orn( class->nickname, in, lut ) ||
vips_image_pio_input( in ) )