/* -*- 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 Ramiro Estrugo */ #ifndef NAUTILUS_GDK_PIXBUF_EXTENSIONS_H #define NAUTILUS_GDK_PIXBUF_EXTENSIONS_H #include #include #include #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); /* 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 as a ArtIRect frame. */ ArtIRect nautilus_gdk_pixbuf_get_frame (const GdkPixbuf *pixbuf); #endif /* NAUTILUS_GDK_PIXBUF_EXTENSIONS_H */