diff options
Diffstat (limited to 'src/3rdparty/libwebp/src/utils/color_cache.c')
-rw-r--r-- | src/3rdparty/libwebp/src/utils/color_cache.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/3rdparty/libwebp/src/utils/color_cache.c b/src/3rdparty/libwebp/src/utils/color_cache.c new file mode 100644 index 0000000..66a4464 --- /dev/null +++ b/src/3rdparty/libwebp/src/utils/color_cache.c @@ -0,0 +1,39 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. +// ----------------------------------------------------------------------------- +// +// Color Cache for WebP Lossless +// +// Author: Jyrki Alakuijala (jyrki@google.com) + +#include <assert.h> +#include <stdlib.h> +#include "./color_cache.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// VP8LColorCache. + +int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) { + const int hash_size = 1 << hash_bits; + assert(cc != NULL); + assert(hash_bits > 0); + cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size, + sizeof(*cc->colors_)); + if (cc->colors_ == NULL) return 0; + cc->hash_shift_ = 32 - hash_bits; + return 1; +} + +void VP8LColorCacheClear(VP8LColorCache* const cc) { + if (cc != NULL) { + free(cc->colors_); + cc->colors_ = NULL; + } +} + |