Set up work for making a 3.5 prerelease.

[mikachu/openbox.git] / render / imagecache.c

diff --git a/render/imagecache.c b/render/imagecache.c
deleted file mode 100644 (file)
index 9c605f9..0000000
--- a/render/imagecache.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
-
-   imagecache.c for the Openbox window manager
-   Copyright (c) 2008        Dana Jansens
-
-   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.
-
-   See the COPYING file for a copy of the GNU General Public License.
-*/
-
-#include "render.h"
-#include "imagecache.h"
-#include "image.h"
-
-static gboolean RrImagePicEqual(const RrImagePic *p1,
-                                const RrImagePic *p2);
-
-RrImageCache* RrImageCacheNew(gint max_resized_saved)
-{
-    RrImageCache *self;
-
-    g_assert(max_resized_saved >= 0);
-
-    self = g_new(RrImageCache, 1);
-    self->ref = 1;
-    self->max_resized_saved = max_resized_saved;
-    self->table = g_hash_table_new((GHashFunc)RrImagePicHash,
-                                   (GEqualFunc)RrImagePicEqual);
-    return self;
-}
-
-void RrImageCacheRef(RrImageCache *self)
-{
-    ++self->ref;
-}
-
-void RrImageCacheUnref(RrImageCache *self)
-{
-    if (self && --self->ref == 0) {
-        g_assert(g_hash_table_size(self->table) == 0);
-        g_hash_table_unref(self->table);
-
-        g_free(self);
-    }
-}
-
-/*! Finds an image in the cache, if it is already in there */
-RrImage* RrImageCacheFind(RrImageCache *self,
-                          RrPixel32 *data, gint w, gint h)
-{
-    RrImagePic pic;
-
-    RrImagePicInit(&pic, w, h, data);
-    return g_hash_table_lookup(self->table, &pic);
-}
-
-#define hashsize(n) ((RrPixel32)1<<(n))
-#define hashmask(n) (hashsize(n)-1)
-#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
-/* mix -- mix 3 32-bit values reversibly. */
-#define mix(a,b,c) \
-{ \
-  a -= c;  a ^= rot(c, 4);  c += b; \
-  b -= a;  b ^= rot(a, 6);  a += c; \
-  c -= b;  c ^= rot(b, 8);  b += a; \
-  a -= c;  a ^= rot(c,16);  c += b; \
-  b -= a;  b ^= rot(a,19);  a += c; \
-  c -= b;  c ^= rot(b, 4);  b += a; \
-}
-/* final -- final mixing of 3 32-bit values (a,b,c) into c */
-#define final(a,b,c) \
-{ \
-  c ^= b; c -= rot(b,14); \
-  a ^= c; a -= rot(c,11); \
-  b ^= a; b -= rot(a,25); \
-  c ^= b; c -= rot(b,16); \
-  a ^= c; a -= rot(c,4);  \
-  b ^= a; b -= rot(a,14); \
-  c ^= b; c -= rot(b,24); \
-}
-
-/* This is a fast, reversable hash function called "lookup3", found here:
-   http://burtleburtle.net/bob/c/lookup3.c, by Bob Jenkins
-
-   This hashing algorithm is "reversible", that is, not cryptographically
-   secure at all.  But we don't care about that, we just want something to
-   tell when images are the same or different relatively quickly.
-*/
-guint32 hashword(const guint32 *key, gint length, guint32 initval)
-{
-    guint32 a,b,c;
-
-    /* Set up the internal state */
-    a = b = c = 0xdeadbeef + (((guint32)length)<<2) + initval;
-
-    /* handle most of the key */
-    while (length > 3)
-    {
-        a += key[0];
-        b += key[1];
-        c += key[2];
-        mix(a,b,c);
-        length -= 3;
-        key += 3;
-    }
-
-    /* handle the last 3 guint32's */
-    switch(length)      /* all the case statements fall through */
-    { 
-    case 3: c+=key[2];
-    case 2: b+=key[1];
-    case 1: a+=key[0];
-        final(a,b,c);
-    case 0:             /* case 0: nothing left to add */
-        break;
-    }
-    /* report the result */
-    return c;
-}
-
-/*! This is some arbitrary initial value for the hashing function.  It's
-  constant so that you get the same result from the same data each time.
-*/
-#define HASH_INITVAL 0xf00d
-
-guint RrImagePicHash(const RrImagePic *p)
-{
-    return hashword(p->data, p->width * p->height, HASH_INITVAL);
-}
-
-static gboolean RrImagePicEqual(const RrImagePic *p1,
-                                const RrImagePic *p2)
-{
-    return p1->width == p2->width && p1->height == p2->height &&
-        p1->sum == p2->sum;
-}