1 // Copyright 2012 Google Inc. All Rights Reserved.
3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the COPYING file in the root of the source
5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree.
8 // -----------------------------------------------------------------------------
10 // Color Cache for WebP Lossless
12 // Author: Jyrki Alakuijala (jyrki@google.com)
16 #include "./color_cache.h"
17 #include "../utils/utils.h"
19 #if defined(__cplusplus) || defined(c_plusplus)
23 //------------------------------------------------------------------------------
26 int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) {
27 const int hash_size = 1 << hash_bits;
29 assert(hash_bits > 0);
30 cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size,
31 sizeof(*cc->colors_));
32 if (cc->colors_ == NULL) return 0;
33 cc->hash_shift_ = 32 - hash_bits;
37 void VP8LColorCacheClear(VP8LColorCache* const cc) {
44 #if defined(__cplusplus) || defined(c_plusplus)