C++ (Cpp) vips_object_new_from_string示例

示例#1

文件： vipsthumbnail.c 项目： ashishof77/libvips

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 );
}

示例#2

文件： dispatch_types.c 项目： nrobidoux/libvips

/* Init function for input interpolate.
 */
static int
input_interpolate_init( im_object *obj, char *str )
{
	VipsObjectClass *interpolate_class;
	VipsObject *object;

	interpolate_class = vips_class_find( "VipsInterpolate", "interpolate" );
	if( !(object = vips_object_new_from_string( interpolate_class, str )) )
		return( -1 );
	*obj = object;

	return( 0 );
}

示例#3

文件： vipsthumbnail.c 项目： HunterChen/libvips

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 );
}