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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* nautilus-gdk-pixbuf-extensions.h: Routines to augment what's in gdk-pixbuf.
Copyright (C) 2000 Eazel, Inc.
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Authors: Darin Adler <darin@eazel.com>
Ramiro Estrugo <ramiro@eazel.com>
*/
#ifndef NAUTILUS_GDK_PIXBUF_EXTENSIONS_H
#define NAUTILUS_GDK_PIXBUF_EXTENSIONS_H
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <libgnomevfs/gnome-vfs-types.h>
#include <libnautilus-extensions/nautilus-art-extensions.h>
#define NAUTILUS_STANDARD_ALPHA_THRESHHOLD 128
#define NAUTILUS_OPACITY_FULLY_TRANSPARENT 0
#define NAUTILUS_OPACITY_FULLY_OPAQUE 255
typedef struct NautilusPixbufLoadHandle NautilusPixbufLoadHandle;
typedef void (* NautilusPixbufLoadCallback) (GnomeVFSResult error,
GdkPixbuf *pixbuf,
gpointer callback_data);
/* Convenience functions for lists of GdkPixbuf objects. */
void nautilus_gdk_pixbuf_list_ref (GList *pixbuf_list);
void nautilus_gdk_pixbuf_list_unref (GList *pixbuf_list);
void nautilus_gdk_pixbuf_list_free (GList *pixbuf_list);
/* Loading a GdkPixbuf with a URI. */
GdkPixbuf * nautilus_gdk_pixbuf_load (const char *uri);
/* Same thing async. */
NautilusPixbufLoadHandle *nautilus_gdk_pixbuf_load_async (const char *uri,
NautilusPixbufLoadCallback callback,
gpointer callback_data);
void nautilus_cancel_gdk_pixbuf_load (NautilusPixbufLoadHandle *handle);
GdkPixbuf * nautilus_gdk_pixbuf_scale_down_to_fit (GdkPixbuf *pixbuf,
int max_width,
int max_height);
GdkPixbuf * nautilus_gdk_pixbuf_scale_to_fit (GdkPixbuf *pixbuf,
int max_width,
int max_height);
double nautilus_gdk_scale_to_fit_factor (int width,
int height,
int max_width,
int max_height,
int *scaled_width,
int *scaled_height);
/* return average color values for each component */
void nautilus_gdk_pixbuf_average_value (GdkPixbuf *pixbuf,
GdkColor *result_color);
void nautilus_gdk_pixbuf_fill_rectangle_with_color (GdkPixbuf *pixbuf,
const ArtIRect *area,
guint32 color);
/* Save a pixbuf to a png file. Return value indicates succss/TRUE or failure/FALSE */
gboolean nautilus_gdk_pixbuf_save_to_file (const GdkPixbuf *pixbuf,
const char *file_name);
void nautilus_gdk_pixbuf_ref_if_not_null (GdkPixbuf *pixbuf_or_null);
void nautilus_gdk_pixbuf_unref_if_not_null (GdkPixbuf *pixbuf_or_null);
/* Copy a pixbuf to an area of a GdkDrawable */
void nautilus_gdk_pixbuf_draw_to_drawable (const GdkPixbuf *pixbuf,
GdkDrawable *drawable,
GdkGC *gc,
int source_x,
int source_y,
const ArtIRect *destination_area,
GdkRgbDither dither,
GdkPixbufAlphaMode alpha_compositing_mode,
int alpha_threshold);
/* Copy a pixbuf to an area of another pixbuf */
void nautilus_gdk_pixbuf_draw_to_pixbuf (const GdkPixbuf *pixbuf,
GdkPixbuf *destination_pixbuf,
int source_x,
int source_y,
const ArtIRect *destination_area);
/* Composite one pixbuf over another with the given opacity */
void nautilus_gdk_pixbuf_draw_to_pixbuf_alpha (const GdkPixbuf *pixbuf,
GdkPixbuf *destination_pixbuf,
int source_x,
int source_y,
const ArtIRect *destination_area,
int opacity,
GdkInterpType interpolation_mode);
/* Fill an area of a pixbuf with a tile. */
void nautilus_gdk_pixbuf_draw_to_pixbuf_tiled (const GdkPixbuf *pixbuf,
GdkPixbuf *destination_pixbuf,
const ArtIRect *destination_area,
int tile_width,
int tile_height,
int tile_origin_x,
int tile_origin_y,
int opacity,
GdkInterpType interpolation_mode);
/* Fill an area of a drawable with a tile. */
void nautilus_gdk_pixbuf_draw_to_drawable_tiled (const GdkPixbuf *pixbuf,
GdkDrawable *drawable,
GdkGC *gc,
const ArtIRect *destination_area,
int tile_width,
int tile_height,
int tile_origin_x,
int tile_origin_y,
GdkRgbDither dither,
GdkPixbufAlphaMode alpha_compositing_mode,
int alpha_threshold);
/* Create a pixbuf from a sub area of another pixbuf */
GdkPixbuf * nautilus_gdk_pixbuf_new_from_pixbuf_sub_area (GdkPixbuf *pixbuf,
const ArtIRect *area);
/* Create a pixbuf from an existing buffer. */
GdkPixbuf * nautilus_gdk_pixbuf_new_from_existing_buffer (guchar *buffer,
int buffer_rowstride,
gboolean buffer_has_alpha,
const ArtIRect *area);
/* Access a global buffer for temporary GdkPixbuf operations.
* The returned buffer will be at least as big as the passed in
* dimensions. The contents are not guaranteed to be anything at
* anytime. Also, it is not thread safe at all.
*/
GdkPixbuf * nautilus_gdk_pixbuf_get_global_buffer (int minimum_width,
int minimum_height);
/* Same as gdk_pixbuf_get_from_drawable() except it deals with
* race conditions and other evil things that can happen */
GdkPixbuf * nautilus_gdk_pixbuf_get_from_window_safe (GdkWindow *window,
int x,
int y,
int width,
int height);
/* Determine whether a pixbuf is valid or not */
gboolean nautilus_gdk_pixbuf_is_valid (const GdkPixbuf *pixbuf);
/* Access the dimensions of a pixbuf. */
NautilusDimensions nautilus_gdk_pixbuf_get_dimensions (const GdkPixbuf *pixbuf);
/* Return the intersection of the pixbuf with the given rectangle. */
ArtIRect nautilus_gdk_pixbuf_intersect (const GdkPixbuf *pixbuf,
int pixbuf_x,
int pixbuf_y,
const ArtIRect *rectangle);
#endif /* NAUTILUS_GDK_PIXBUF_EXTENSIONS_H */
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