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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_EXTRAS_DEC_PNM_H_
#define LIB_EXTRAS_DEC_PNM_H_
// Decodes PBM/PGM/PPM/PFM pixels in memory.
#include <stddef.h>
#include <stdint.h>
// TODO(janwas): workaround for incorrect Win64 codegen (cause unknown)
#include <hwy/highway.h>
#include <mutex>
#include "lib/extras/dec/color_hints.h"
#include "lib/extras/mmap.h"
#include "lib/extras/packed_image.h"
#include "lib/jxl/base/data_parallel.h"
#include "lib/jxl/base/span.h"
#include "lib/jxl/base/status.h"
namespace jxl {
struct SizeConstraints;
namespace extras {
// Decodes `bytes` into `ppf`. color_hints may specify "color_space", which
// defaults to sRGB.
Status DecodeImagePNM(Span<const uint8_t> bytes, const ColorHints& color_hints,
PackedPixelFile* ppf,
const SizeConstraints* constraints = nullptr);
void TestCodecPNM();
struct HeaderPNM {
size_t xsize;
size_t ysize;
bool is_gray; // PGM
bool has_alpha; // PAM
size_t bits_per_sample;
bool floating_point;
bool big_endian;
std::vector<JxlExtraChannelType> ec_types; // PAM
};
class ChunkedPNMDecoder {
public:
static StatusOr<ChunkedPNMDecoder> Init(const char* file_path);
// Initializes `ppf` with a pointer to this `ChunkedPNMDecoder`.
jxl::Status InitializePPF(const ColorHints& color_hints,
PackedPixelFile* ppf);
private:
HeaderPNM header_ = {};
size_t data_start_ = 0;
MemoryMappedFile pnm_;
friend struct PNMChunkedInputFrame;
};
} // namespace extras
} // namespace jxl
#endif // LIB_EXTRAS_DEC_PNM_H_
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