test_image.h - mozsearch

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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_TEST_IMAGE_H_

#define LIB_JXL_TEST_IMAGE_H_

#include <jxl/codestream_header.h>

#include <jxl/types.h>

#include <cstddef>

#include <cstdint>

#include <string>

#include <vector>

#include "lib/extras/packed_image.h"

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

namespace jxl {

namespace test {

// Returns a test image with some autogenerated pixel content, using 16 bits per

// channel, big endian order, 1 to 4 channels

// The seed parameter allows to create images with different pixel content.

std::vector<uint8_t> GetSomeTestImage(size_t xsize, size_t ysize,

                                      size_t num_channels, uint16_t seed);

class TestImage {

 public:

  TestImage();

  extras::PackedPixelFile& ppf() { return ppf_; }

  Status DecodeFromBytes(const std::vector<uint8_t>& bytes);

  TestImage& ClearMetadata();

  Status SetDimensions(size_t xsize, size_t ysize);

  Status SetChannels(size_t num_channels);

  // Sets the same bit depth on color, alpha and all extra channels.

  TestImage& SetAllBitDepths(uint32_t bits_per_sample,

                             uint32_t exponent_bits_per_sample = 0);

  TestImage& SetDataType(JxlDataType data_type);

  TestImage& SetEndianness(JxlEndianness endianness);

  TestImage& SetRowAlignment(size_t align);

  Status SetColorEncoding(const std::string& description);

  Status CoalesceGIFAnimationWithAlpha();

  class Frame {

   public:

    Frame(TestImage* parent, bool is_preview, size_t index);

    void ZeroFill();

    void RandomFill(uint16_t seed = 177);

    Status SetValue(size_t y, size_t x, size_t c, float val);

   private:

    extras::PackedPixelFile& ppf() const { return parent_->ppf(); }

    extras::PackedFrame& frame() {

      return is_preview_ ? *ppf().preview_frame : ppf().frames[index_];

    TestImage* parent_;

    bool is_preview_;

    size_t index_;

};

  StatusOr<Frame> AddFrame();

 private:

  extras::PackedPixelFile ppf_;

  JxlPixelFormat format_ = {3, JXL_TYPE_UINT8, JXL_LITTLE_ENDIAN, 0};

  static void CropLayerInfo(size_t xsize, size_t ysize, JxlLayerInfo* info);

  static void CropImage(size_t xsize, size_t ysize, extras::PackedImage* image);

  static JxlDataType DefaultDataType(const JxlBasicInfo& info);

};

}  // namespace test

}  // namespace jxl

#endif  // LIB_JXL_TEST_IMAGE_H_