// 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.

#include "lib/jxl/enc_debug_image.h"

#include <jxl/memory_manager.h>

#include <cstddef>

#include <cstdint>

#include "lib/jxl/base/rect.h"

#include "lib/jxl/base/status.h"

#include "lib/jxl/color_encoding_internal.h"

#include "lib/jxl/dec_external_image.h"

#include "lib/jxl/enc_params.h"

#include "lib/jxl/image_ops.h"

namespace jxl {

namespace {

template <typename From>

StatusOr<Image3F> ConvertToFloat(const Image3<From>& from) {

  float factor = 1.0f / std::numeric_limits<From>::max();

  if (std::is_same<From, double>::value || std::is_same<From, float>::value) {

    factor = 1.0f;

  }

  JxlMemoryManager* memory_manager = from.memory_manager();

  JXL_ASSIGN_OR_RETURN(

      Image3F to, Image3F::Create(memory_manager, from.xsize(), from.ysize()));

  for (size_t c = 0; c < 3; ++c) {

    for (size_t y = 0; y < from.ysize(); ++y) {

      const From* const JXL_RESTRICT row_from = from.ConstPlaneRow(c, y);

      float* const JXL_RESTRICT row_to = to.PlaneRow(c, y);

      for (size_t x = 0; x < from.xsize(); ++x) {

        row_to[x] = row_from[x] * factor;

      }

    }

  }

  return to;

}

Unexecuted instantiation: enc_debug_image.cc:jxl::StatusOr<jxl::Image3<float> > jxl::(anonymous namespace)::ConvertToFloat<float>(jxl::Image3<float> const&)

Unexecuted instantiation: enc_debug_image.cc:jxl::StatusOr<jxl::Image3<float> > jxl::(anonymous namespace)::ConvertToFloat<unsigned char>(jxl::Image3<unsigned char> const&)

template <typename T>

Status DumpImageT(const CompressParams& cparams, const char* label,

                  const ColorEncoding& color_encoding, const Image3<T>& image) {

  if (!cparams.debug_image) return true;

  JXL_ASSIGN_OR_RETURN(Image3F float_image, ConvertToFloat(image));

  JxlColorEncoding color = color_encoding.ToExternal();

  size_t num_pixels = 3 * image.xsize() * image.ysize();

  std::vector<uint16_t> pixels(num_pixels);

  const ImageF* channels[3];

  for (int c = 0; c < 3; ++c) {

    channels[c] = &float_image.Plane(c);

  }

  JXL_RETURN_IF_ERROR(ConvertChannelsToExternal(

      channels, 3, 16, false, JXL_BIG_ENDIAN, 6 * image.xsize(), nullptr,

      pixels.data(), 2 * num_pixels, PixelCallback(), Orientation::kIdentity));

  (*cparams.debug_image)(cparams.debug_image_opaque, label, image.xsize(),

                         image.ysize(), &color, pixels.data());

  return true;

}

Unexecuted instantiation: enc_debug_image.cc:jxl::Status jxl::(anonymous namespace)::DumpImageT<float>(jxl::CompressParams const&, char const*, jxl::ColorEncoding const&, jxl::Image3<float> const&)

Unexecuted instantiation: enc_debug_image.cc:jxl::Status jxl::(anonymous namespace)::DumpImageT<unsigned char>(jxl::CompressParams const&, char const*, jxl::ColorEncoding const&, jxl::Image3<unsigned char> const&)

template <typename T>

Status DumpPlaneNormalizedT(const CompressParams& cparams, const char* label,

                            const Plane<T>& image) {

  T min;

  T max;

  ImageMinMax(image, &min, &max);

  JxlMemoryManager* memory_manager = image.memory_manager();

  JXL_ASSIGN_OR_RETURN(

      Image3B normalized,

      Image3B::Create(memory_manager, image.xsize(), image.ysize()));

  for (size_t c = 0; c < 3; ++c) {

    float mul = min == max ? 0 : (255.0f / (max - min));

    for (size_t y = 0; y < image.ysize(); ++y) {

      const T* JXL_RESTRICT row_in = image.ConstRow(y);

      uint8_t* JXL_RESTRICT row_out = normalized.PlaneRow(c, y);

      for (size_t x = 0; x < image.xsize(); ++x) {

        row_out[x] = static_cast<uint8_t>((row_in[x] - min) * mul);

      }

    }

  }

  return DumpImageT(cparams, label, ColorEncoding::SRGB(), normalized);

}

Unexecuted instantiation: enc_debug_image.cc:jxl::Status jxl::(anonymous namespace)::DumpPlaneNormalizedT<float>(jxl::CompressParams const&, char const*, jxl::Plane<float> const&)

Unexecuted instantiation: enc_debug_image.cc:jxl::Status jxl::(anonymous namespace)::DumpPlaneNormalizedT<unsigned char>(jxl::CompressParams const&, char const*, jxl::Plane<unsigned char> const&)

}  // namespace

Status DumpImage(const CompressParams& cparams, const char* label,

                 const Image3<float>& image) {

  return DumpImageT(cparams, label, ColorEncoding::SRGB(), image);

}

Status DumpImage(const CompressParams& cparams, const char* label,

                 const Image3<uint8_t>& image) {

  return DumpImageT(cparams, label, ColorEncoding::SRGB(), image);

}

Status DumpXybImage(const CompressParams& cparams, const char* label,

                    const Image3F& image) {

  if (!cparams.debug_image) return true;

  JxlMemoryManager* memory_manager = image.memory_manager();

  JXL_ASSIGN_OR_RETURN(

      Image3F linear,

      Image3F::Create(memory_manager, image.xsize(), image.ysize()));

  OpsinParams opsin_params;

  opsin_params.Init(kDefaultIntensityTarget);

  JXL_RETURN_IF_ERROR(

      OpsinToLinear(image, Rect(linear), nullptr, &linear, opsin_params));

  return DumpImageT(cparams, label, ColorEncoding::LinearSRGB(), linear);

}

Status DumpPlaneNormalized(const CompressParams& cparams, const char* label,

                           const Plane<float>& image) {

  return DumpPlaneNormalizedT(cparams, label, image);

}

Status DumpPlaneNormalized(const CompressParams& cparams, const char* label,

                           const Plane<uint8_t>& image) {

  return DumpPlaneNormalizedT(cparams, label, image);

}

}  // namespace jxl