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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 3 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_DISPLAY_SHELL_SCALE_H__
+#define __GIMP_DISPLAY_SHELL_SCALE_H__
+
+
+gboolean gimp_display_shell_scale_revert (GimpDisplayShell *shell);
+gboolean gimp_display_shell_scale_can_revert (GimpDisplayShell *shell);
+void gimp_display_shell_scale_save_revert_values (GimpDisplayShell *shell);
+
+void gimp_display_shell_scale_set_dot_for_dot (GimpDisplayShell *shell,
+ gboolean dot_for_dot);
+
+void gimp_display_shell_scale_get_image_size (GimpDisplayShell *shell,
+ gint *w,
+ gint *h);
+void gimp_display_shell_scale_get_image_bounds (GimpDisplayShell *shell,
+ gint *x,
+ gint *y,
+ gint *w,
+ gint *h);
+void gimp_display_shell_scale_get_image_unrotated_bounds
+ (GimpDisplayShell *shell,
+ gint *x,
+ gint *y,
+ gint *w,
+ gint *h);
+void gimp_display_shell_scale_get_image_bounding_box
+ (GimpDisplayShell *shell,
+ gint *x,
+ gint *y,
+ gint *w,
+ gint *h);
+void gimp_display_shell_scale_get_image_unrotated_bounding_box
+ (GimpDisplayShell *shell,
+ gint *x,
+ gint *y,
+ gint *w,
+ gint *h);
+gboolean gimp_display_shell_scale_image_is_within_viewport
+ (GimpDisplayShell *shell,
+ gboolean *horizontally,
+ gboolean *vertically);
+
+void gimp_display_shell_scale_update (GimpDisplayShell *shell);
+
+void gimp_display_shell_scale (GimpDisplayShell *shell,
+ GimpZoomType zoom_type,
+ gdouble scale,
+ GimpZoomFocus zoom_focus);
+void gimp_display_shell_scale_to_rectangle (GimpDisplayShell *shell,
+ GimpZoomType zoom_type,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ gboolean resize_window);
+void gimp_display_shell_scale_fit_in (GimpDisplayShell *shell);
+void gimp_display_shell_scale_fill (GimpDisplayShell *shell);
+void gimp_display_shell_scale_by_values (GimpDisplayShell *shell,
+ gdouble scale,
+ gint offset_x,
+ gint offset_y,
+ gboolean resize_window);
+
+void gimp_display_shell_scale_drag (GimpDisplayShell *shell,
+ gdouble start_x,
+ gdouble start_y,
+ gdouble delta_x,
+ gdouble delta_y);
+
+void gimp_display_shell_scale_shrink_wrap (GimpDisplayShell *shell,
+ gboolean grow_only);
+void gimp_display_shell_scale_resize (GimpDisplayShell *shell,
+ gboolean resize_window,
+ gboolean grow_only);
+void gimp_display_shell_set_initial_scale (GimpDisplayShell *shell,
+ gdouble scale,
+ gint *display_width,
+ gint *display_height);
+
+void gimp_display_shell_get_rotated_scale (GimpDisplayShell *shell,
+ gdouble *scale_x,
+ gdouble *scale_y);
+
+/* debug API for testing */
+
+void gimp_display_shell_push_zoom_focus_pointer_pos (GimpDisplayShell *shell,
+ gint x,
+ gint y);
+
+
+#endif /* __GIMP_DISPLAY_SHELL_SCALE_H__ */