| // 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) |
| |
| #if defined(STARBOARD) |
| #include "starboard/client_porting/poem/assert_poem.h" |
| #include "starboard/client_porting/poem/stdlib_poem.h" |
| #include "starboard/client_porting/poem/string_poem.h" |
| #else |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #endif |
| #include "src/utils/color_cache_utils.h" |
| #include "src/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; |
| 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_)); |
| } |