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diff --git a/app/widgets/gimpviewrenderer.h b/app/widgets/gimpviewrenderer.h
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpviewrenderer.h
+ * Copyright (C) 2003 Michael Natterer <mitch@gimp.org>
+ *
+ * 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_VIEW_RENDERER_H__
+#define __GIMP_VIEW_RENDERER_H__
+
+
+#define GIMP_VIEW_MAX_BORDER_WIDTH 16
+
+
+#define GIMP_TYPE_VIEW_RENDERER (gimp_view_renderer_get_type ())
+#define GIMP_VIEW_RENDERER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_VIEW_RENDERER, GimpViewRenderer))
+#define GIMP_VIEW_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_VIEW_RENDERER, GimpViewRendererClass))
+#define GIMP_IS_VIEW_RENDERER(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GIMP_TYPE_VIEW_RENDERER))
+#define GIMP_IS_VIEW_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_VIEW_RENDERER))
+#define GIMP_VIEW_RENDERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_VIEW_RENDERER, GimpViewRendererClass))
+
+
+typedef struct _GimpViewRendererPrivate GimpViewRendererPrivate;
+typedef struct _GimpViewRendererClass GimpViewRendererClass;
+
+struct _GimpViewRenderer
+{
+ GObject parent_instance;
+
+ GimpContext *context;
+
+ GType viewable_type;
+ GimpViewable *viewable;
+
+ gint width;
+ gint height;
+ gint border_width;
+ guint dot_for_dot : 1;
+ guint is_popup : 1;
+
+ GimpViewBorderType border_type;
+ GimpRGB border_color;
+
+ /*< protected >*/
+ cairo_surface_t *surface;
+
+ gint size;
+
+ /*< private >*/
+ GimpViewRendererPrivate *priv;
+};
+
+struct _GimpViewRendererClass
+{
+ GObjectClass parent_class;
+
+ GdkPixbuf *frame;
+ gint frame_left;
+ gint frame_right;
+ gint frame_bottom;
+ gint frame_top;
+
+ /* signals */
+ void (* update) (GimpViewRenderer *renderer);
+
+ /* virtual functions */
+ void (* set_context) (GimpViewRenderer *renderer,
+ GimpContext *context);
+ void (* invalidate) (GimpViewRenderer *renderer);
+ void (* draw) (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ cairo_t *cr,
+ gint available_width,
+ gint available_height);
+ void (* render) (GimpViewRenderer *renderer,
+ GtkWidget *widget);
+};
+
+
+GType gimp_view_renderer_get_type (void) G_GNUC_CONST;
+
+GimpViewRenderer * gimp_view_renderer_new (GimpContext *context,
+ GType viewable_type,
+ gint size,
+ gint border_width,
+ gboolean is_popup);
+GimpViewRenderer * gimp_view_renderer_new_full (GimpContext *context,
+ GType viewable_type,
+ gint width,
+ gint height,
+ gint border_width,
+ gboolean is_popup);
+
+void gimp_view_renderer_set_context (GimpViewRenderer *renderer,
+ GimpContext *context);
+void gimp_view_renderer_set_viewable (GimpViewRenderer *renderer,
+ GimpViewable *viewable);
+void gimp_view_renderer_set_size (GimpViewRenderer *renderer,
+ gint size,
+ gint border_width);
+void gimp_view_renderer_set_size_full (GimpViewRenderer *renderer,
+ gint width,
+ gint height,
+ gint border_width);
+void gimp_view_renderer_set_dot_for_dot (GimpViewRenderer *renderer,
+ gboolean dot_for_dot);
+void gimp_view_renderer_set_border_type (GimpViewRenderer *renderer,
+ GimpViewBorderType border_type);
+void gimp_view_renderer_set_border_color (GimpViewRenderer *renderer,
+ const GimpRGB *border_color);
+void gimp_view_renderer_set_background (GimpViewRenderer *renderer,
+ const gchar *icon_name);
+void gimp_view_renderer_set_color_config (GimpViewRenderer *renderer,
+ GimpColorConfig *color_config);
+
+void gimp_view_renderer_invalidate (GimpViewRenderer *renderer);
+void gimp_view_renderer_update (GimpViewRenderer *renderer);
+void gimp_view_renderer_update_idle (GimpViewRenderer *renderer);
+void gimp_view_renderer_remove_idle (GimpViewRenderer *renderer);
+
+void gimp_view_renderer_draw (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ cairo_t *cr,
+ gint available_width,
+ gint available_height);
+
+/* protected */
+
+void gimp_view_renderer_render_temp_buf_simple (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ GimpTempBuf *temp_buf);
+void gimp_view_renderer_render_temp_buf (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ GimpTempBuf *temp_buf,
+ gint temp_buf_x,
+ gint temp_buf_y,
+ gint channel,
+ GimpViewBG inside_bg,
+ GimpViewBG outside_bg);
+void gimp_view_renderer_render_pixbuf (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ GdkPixbuf *pixbuf);
+void gimp_view_renderer_render_icon (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ const gchar *icon_name);
+GimpColorTransform *
+ gimp_view_renderer_get_color_transform (GimpViewRenderer *renderer,
+ GtkWidget *widget,
+ const Babl *src_format,
+ const Babl *dest_format);
+void gimp_view_renderer_free_color_transform (GimpViewRenderer *renderer);
+
+
+#endif /* __GIMP_VIEW_RENDERER_H__ */