diff options
author | Liang Qi <liang.qi@qt.io> | 2017-04-21 11:08:50 +0200 |
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committer | Liang Qi <liang.qi@qt.io> | 2017-04-21 11:08:51 +0200 |
commit | 175dcf6e565bd638601697bfa6becd3a3321a0de (patch) | |
tree | d269963f5202a974248a38a8f84463c4bb9fdce9 /src/3rdparty/libwebp/src/utils/color_cache_utils.c | |
parent | 834bb773e36c974748f7ee947b4f07088ee6f5fb (diff) | |
parent | c7a6a451a5c277556e28dfb3b4b943719cdda7ff (diff) |
Merge remote-tracking branch 'origin/5.9' into dev
Change-Id: I182b9e5f4a9283c289bbe816868f000ad07b15f4
Diffstat (limited to 'src/3rdparty/libwebp/src/utils/color_cache_utils.c')
-rw-r--r-- | src/3rdparty/libwebp/src/utils/color_cache_utils.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/3rdparty/libwebp/src/utils/color_cache_utils.c b/src/3rdparty/libwebp/src/utils/color_cache_utils.c new file mode 100644 index 0000000..0172590 --- /dev/null +++ b/src/3rdparty/libwebp/src/utils/color_cache_utils.c @@ -0,0 +1,49 @@ +// 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 <string.h> +#include "./color_cache_utils.h" +#include "./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; + cc->hash_bits_ = hash_bits; + return 1; +} + +void VP8LColorCacheClear(VP8LColorCache* const cc) { + if (cc != NULL) { + WebPSafeFree(cc->colors_); + cc->colors_ = NULL; + } +} + +void VP8LColorCacheCopy(const VP8LColorCache* const src, + VP8LColorCache* const dst) { + assert(src != NULL); + assert(dst != NULL); + assert(src->hash_bits_ == dst->hash_bits_); + memcpy(dst->colors_, src->colors_, + ((size_t)1u << dst->hash_bits_) * sizeof(*dst->colors_)); +} |