/usr/include/gthumb-3.2/gthumb/cairo-scale.h is in gthumb-dev 3:3.3.1.is.3.2.7-0ubuntu1.
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/*
* GThumb
*
* Copyright (C) 2012 The Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CAIRO_SCALE_H
#define CAIRO_SCALE_H
#include <glib.h>
#include "gth-async-task.h"
G_BEGIN_DECLS
#define _CAIRO_MAX_SCALE_FACTOR 1.33
typedef enum /*< skip >*/ {
SCALE_FILTER_POINT = 0,
SCALE_FILTER_BOX,
SCALE_FILTER_TRIANGLE,
SCALE_FILTER_LANCZOS,
N_SCALE_FILTERS,
SCALE_FILTER_FAST = SCALE_FILTER_POINT,
SCALE_FILTER_GOOD = SCALE_FILTER_BOX,
SCALE_FILTER_BEST = SCALE_FILTER_TRIANGLE
} scale_filter_t;
cairo_surface_t * _cairo_image_surface_scale_nearest (cairo_surface_t *image,
int new_width,
int new_height);
cairo_surface_t * _cairo_image_surface_scale (cairo_surface_t *image,
int width,
int height,
scale_filter_t quality,
GthAsyncTask *task);
cairo_surface_t * _cairo_image_surface_scale_squared (cairo_surface_t *image,
int size,
scale_filter_t quality,
GthAsyncTask *task);
cairo_surface_t * _cairo_image_surface_scale_bilinear (cairo_surface_t *image,
int new_width,
int new_height);
G_END_DECLS
#endif /* CAIRO_SCALE_H */
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