gimp/app/widgets/gimpviewrenderer.h

/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimppreviewrenderer.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 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __GIMP_PREVIEW_RENDERER_H__
#define __GIMP_PREVIEW_RENDERER_H__


#define GIMP_PREVIEW_MAX_SIZE         1024
#define GIMP_PREVIEW_MAX_BORDER_WIDTH   16


#define GIMP_TYPE_PREVIEW_RENDERER            (gimp_preview_renderer_get_type ())
#define GIMP_PREVIEW_RENDERER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_PREVIEW_RENDERER, GimpPreviewRenderer))
#define GIMP_PREVIEW_RENDERER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_PREVIEW_RENDERER, GimpPreviewRendererClass))
#define GIMP_IS_PREVIEW_RENDERER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE (obj, GIMP_TYPE_PREVIEW_RENDERER))
#define GIMP_IS_PREVIEW_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_PREVIEW_RENDERER))
#define GIMP_PREVIEW_RENDERER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_PREVIEW_RENDERER, GimpPreviewRendererClass))


typedef struct _GimpPreviewRendererClass  GimpPreviewRendererClass;

struct _GimpPreviewRenderer
{
  GObject       parent_instance;

  GimpViewable *viewable;

  gint          width;
  gint          height;
  gint          border_width;
  gboolean      dot_for_dot;
  gboolean      is_popup;

  GimpRGB       border_color;
  GdkGC        *border_gc;

  /*< private >*/
  guchar       *buffer;
  gint          rowstride;
  gint          bytes;

  GdkPixbuf    *no_preview_pixbuf;

  gint          size;
  gboolean      needs_render;
  guint         idle_id;
};

struct _GimpPreviewRendererClass
{
  GObjectClass  parent_class;

  /*  signals  */
  void (* update) (GimpPreviewRenderer *renderer);

  /*  virtual functions  */
  void (* render) (GimpPreviewRenderer *renderer,
                   GtkWidget           *widget);
};


GType                 gimp_preview_renderer_get_type (void) G_GNUC_CONST;

GimpPreviewRenderer * gimp_preview_renderer_new      (GimpViewable *viewable,
                                                      gint          size,
                                                      gint          border_width,
                                                      gboolean      is_popup);
GimpPreviewRenderer * gimp_preview_renderer_new_full (GimpViewable *viewable,
                                                      gint          width,
                                                      gint          height,
                                                      gint          border_width,
                                                      gboolean      is_popup);
GimpPreviewRenderer * gimp_preview_renderer_new_by_type (GType      viewable_type,
                                                         gint       size,
                                                         gint       border_width,
                                                         gboolean   is_popup);

void   gimp_preview_renderer_set_viewable     (GimpPreviewRenderer *renderer,
                                               GimpViewable        *viewable);
void   gimp_preview_renderer_set_size         (GimpPreviewRenderer *renderer,
                                               gint                 size,
                                               gint                 border_width);
void   gimp_preview_renderer_set_size_full    (GimpPreviewRenderer *renderer,
                                               gint                 width,
                                               gint                 height,
                                               gint                 border_width);
void   gimp_preview_renderer_set_dot_for_dot  (GimpPreviewRenderer *renderer,
                                               gboolean             dot_for_dot);
void   gimp_preview_renderer_set_border_color (GimpPreviewRenderer *renderer,
                                               const GimpRGB       *border_color);

void   gimp_preview_renderer_update          (GimpPreviewRenderer *renderer);

void   gimp_preview_renderer_draw            (GimpPreviewRenderer *renderer,
                                              GdkWindow           *window,
                                              GtkWidget           *widget,
                                              GdkRectangle        *draw_area,
                                              GdkRectangle        *expose_area);


/*  protected  */

void   gimp_preview_render_to_buffer         (TempBuf            *temp_buf,
                                              gint                channel,
                                              GimpPreviewBG       inside_bg,
                                              GimpPreviewBG       outside_bg,
                                              guchar             *dest_buffer,
                                              gint                dest_width,
                                              gint                dest_height,
                                              gint                dest_rowstride,
                                              gint                dest_bytes);
void   gimp_preview_renderer_render_preview (GimpPreviewRenderer *renderer,
                                             TempBuf             *temp_buf,
                                             gint                 channel,
                                             GimpPreviewBG        inside_bg,
                                             GimpPreviewBG        outside_bg);


#endif /* __GIMP_PREVIEW_RENDERER_H__ */