59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
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imagecache.h for the Openbox window manager
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Copyright (c) 2008 Dana Jansens
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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See the COPYING file for a copy of the GNU General Public License.
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*/
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#ifndef __imagecache_h
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#define __imagecache_h
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#include <glib.h>
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struct _RrImagePic;
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guint RrImagePicHash(const struct _RrImagePic *p);
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/*! Create a new image cache. An image cache is basically a hash table to look
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up RrImages. Each RrImage in the cache may contain one or more Pictures,
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that is one or more actual copies of image data at various sizes. For eg,
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for a window, all of its various icons are loaded into the same RrImage.
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When an RrImage is drawn and a picture inside it needs to be resized, that
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is also saved within the RrImage.
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For each picture that an RrImage has, the picture is hashed and that is used
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as a key to find the RrImage. So, given any picture in any RrImage in the
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cache, if you hash it, you will find the RrImage.
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*/
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struct _RrImageCache {
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gint ref;
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/*! When an original picture is resized for an RrImage, the resized picture
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is saved in the RrImage. This specifies how many pictures should be
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saved at a time. When this is exceeded, the least recently used
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"resized" picture is deleted.
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*/
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gint max_resized_saved;
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/*! A hash table of image sets in the cache that don't have a file name
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attached to them, with their key being a hash of the contents of the
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image. */
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GHashTable *pic_table;
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/*! Used to find out if an image file has already been loaded into an
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image set. Provides a quick file_name -> RrImageSet lookup. */
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GHashTable *name_table;
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};
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#endif
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