static int
thumbnail3( IMAGE *in, IMAGE *out )
{
int shrink;
double residual;
VipsInterpolate *interp;
int result;
shrink = calculate_shrink( in->Xsize, in->Ysize, &residual );
/* For images smaller than the thumbnail, we upscale with nearest
* neighbor. Otherwise we makes thumbnails that look fuzzy and awful.
*/
if( !(interp = VIPS_INTERPOLATE( vips_object_new_from_string(
g_type_class_ref( VIPS_TYPE_INTERPOLATE ),
residual > 1.0 ? "nearest" : interpolator ) )) )
return( -1 );
if( verbose ) {
printf( "integer shrink by %d\n", shrink );
printf( "residual scale by %g\n", residual );
printf( "%s interpolation\n",
VIPS_OBJECT_GET_CLASS( interp )->nickname );
}
result = shrink_factor( in, out, shrink, residual, interp );
g_object_unref( interp );
return( result );
}
/* Call im_affinei_all via arg vector.
*/
static int
affinei_all_vec( im_object *argv )
{
VipsInterpolate *interpolate = VIPS_INTERPOLATE( argv[2] );
double a = *((double *) argv[3]);
double b = *((double *) argv[4]);
double c = *((double *) argv[5]);
double d = *((double *) argv[6]);
double dx = *((double *) argv[7]);
double dy = *((double *) argv[8]);
return( im_affinei_all( argv[0], argv[1], interpolate,
a, b, c, d, dx, dy ) );
}
/* Call im_affinei via arg vector.
*/
static int
affinei_vec( im_object *argv )
{
VipsInterpolate *interpolate = VIPS_INTERPOLATE( argv[2] );
double a = *((double *) argv[3]);
double b = *((double *) argv[4]);
double c = *((double *) argv[5]);
double d = *((double *) argv[6]);
double dx = *((double *) argv[7]);
double dy = *((double *) argv[8]);
int x = *((int *) argv[9]);
int y = *((int *) argv[10]);
int w = *((int *) argv[11]);
int h = *((int *) argv[12]);
return( im_affinei( argv[0], argv[1], interpolate,
a, b, c, d, dx, dy, x, y, w, h ) );
}
static VipsInterpolate *
thumbnail_interpolator( VipsObject *process, VipsImage *in )
{
double residual;
VipsInterpolate *interp;
calculate_shrink( in, &residual );
/* For images smaller than the thumbnail, we upscale with nearest
* neighbor. Otherwise we makes thumbnails that look fuzzy and awful.
*/
if( !(interp = VIPS_INTERPOLATE( vips_object_new_from_string(
g_type_class_ref( VIPS_TYPE_INTERPOLATE ),
residual > 1.0 ? "nearest" : interpolator ) )) )
return( NULL );
vips_object_local( process, interp );
return( interp );
}
