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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>
*/
#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 <libart_lgpl/art_rect.h>
#define NAUTILUS_STANDARD_ALPHA_THRESHHOLD 128
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);
/* Draw a GdkPixbuf tiled. */
void nautilus_gdk_pixbuf_render_to_pixbuf_tiled (GdkPixbuf *source_pixbuf,
GdkPixbuf *destination_pixbuf,
const GdkRectangle *rect,
int x_dither,
int y_dither);
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);
/* Draw text onto a GdkPixbuf using the given font and rect */
void nautilus_gdk_pixbuf_draw_text (GdkPixbuf *pixbuf,
const GdkFont *font,
const double font_scale,
const ArtIRect *destination_rect,
const char *text,
guint text_color,
guint overall_alpha);
void nautilus_gdk_pixbuf_fill_rectangle_with_color (GdkPixbuf *pixbuf,
const GdkRectangle *rectangle,
guint32 color);
/* Render a GdkPixbuf from source_point destination_area of a GdkDrawable. */
void nautilus_gdk_pixbuf_render_to_drawable (const GdkPixbuf *pixbuf,
GdkDrawable *drawable,
GdkGC *gc,
const GdkPoint *source_point,
const GdkRectangle *destination_area,
GdkRgbDither dither);
/* Render a GdkPixbuf from source_point destination_area of another GdkPixbuf. */
void nautilus_gdk_pixbuf_render_to_pixbuf (const GdkPixbuf *pixbuf,
GdkPixbuf *destination_pixbuf,
const GdkPoint *source_point,
const GdkRectangle *destination_area);
/* Render a GdkPixbuf from source_point destination_area of another GdkPixbuf. */
void nautilus_gdk_pixbuf_render_to_pixbuf_alpha (const GdkPixbuf *pixbuf,
GdkPixbuf *destination_pixbuf,
const GdkRectangle *destination_area,
GdkInterpType interpolation_mode,
guchar overall_alpha);
/* Save a pixbuf to a png file. Return value indicates succss/TRUE or failure/FALSE */
gboolean nautilus_gdk_pixbuf_save_to_file (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);
#endif /* NAUTILUS_GDK_PIXBUF_EXTENSIONS_H */
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