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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#ifndef LIB_JXL_ICC_CODEC_H_
#define LIB_JXL_ICC_CODEC_H_
// Compressed representation of ICC profiles.
#include <stddef.h>
#include <stdint.h>
#include "lib/jxl/base/compiler_specific.h"
#include "lib/jxl/base/padded_bytes.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/dec_ans.h"
#include "lib/jxl/dec_bit_reader.h"
namespace jxl {
struct ICCReader {
Status Init(BitReader* reader, size_t output_limit);
Status Process(BitReader* reader, PaddedBytes* icc);
void Reset() {
bits_to_skip_ = 0;
decompressed_.clear();
}
private:
Status CheckEOI(BitReader* reader);
size_t i_ = 0;
size_t bits_to_skip_ = 0;
size_t used_bits_base_ = 0;
uint64_t enc_size_ = 0;
std::vector<uint8_t> context_map_;
ANSCode code_;
ANSSymbolReader ans_reader_;
PaddedBytes decompressed_;
};
// `icc` may be empty afterwards - if so, call CreateProfile. Does not append,
// clears any original data that was in icc.
// If `output_limit` is not 0, then returns error if resulting profile would be
// longer than `output_limit`
Status ReadICC(BitReader* JXL_RESTRICT reader, PaddedBytes* JXL_RESTRICT icc,
size_t output_limit = 0);
// Exposed only for testing
Status PredictICC(const uint8_t* icc, size_t size, PaddedBytes* result);
// Exposed only for testing
Status UnpredictICC(const uint8_t* enc, size_t size, PaddedBytes* result);
} // namespace jxl
#endif // LIB_JXL_ICC_CODEC_H_
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