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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpeevl.h
* Copyright (C) 2008-2009 Fredrik Alstromer <roe@excu.se>
* Copyright (C) 2008-2009 Martin Nordholts <martinn@svn.gnome.org>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#ifndef __GIMP_EEVL_H__
#define __GIMP_EEVL_H__
G_BEGIN_DECLS
/**
* GimpEevlQuantity:
* @value: In reference units.
* @dimension: in has a dimension of 1, in^2 has a dimension of 2 etc
*/
typedef struct
{
gdouble value;
gint dimension;
} GimpEevlQuantity;
/**
* GimpEevlUnitResolverProc:
* @identifier: Identifier of unit to resolve or %NULL if default unit
* should be resolved.
* @factor: Units per reference unit. For example, in GIMP the
* reference unit is inches so resolving "mm" should
* return 25.4 since there are 25.4 millimeters per inch.
* @offset: Offset to apply after scaling the value according to @factor.
* @data: Data given to gimp_eevl_evaluate().
*
* Returns: If the unit was successfully resolved or not.
*
*/
typedef gboolean (* GimpEevlUnitResolverProc) (const gchar *identifier,
GimpEevlQuantity *factor,
gdouble *offset,
gpointer data);
/**
* GimpEevlOptions:
* @unit_resolver_proc: Unit resolver callback.
* @data: Data passed to unit resolver.
* @ratio_expressions: Allow ratio expressions
* @ratio_invert: Invert ratios
* @ratio_quantity: Quantity to multiply ratios by
*/
typedef struct
{
GimpEevlUnitResolverProc unit_resolver_proc;
gpointer data;
gboolean ratio_expressions;
gboolean ratio_invert;
GimpEevlQuantity ratio_quantity;
} GimpEevlOptions;
#define GIMP_EEVL_OPTIONS_INIT \
((const GimpEevlOptions) \
{ \
.unit_resolver_proc = NULL, \
.data = NULL, \
\
.ratio_expressions = FALSE, \
.ratio_invert = FALSE, \
.ratio_quantity = {0.0, 0} \
})
gboolean gimp_eevl_evaluate (const gchar *string,
const GimpEevlOptions *options,
GimpEevlQuantity *result,
const gchar **error_pos,
GError **error);
G_END_DECLS
#endif /* __GIMP_EEVL_H__ */
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