ImageDecoder.h

#pragma once
 
#include <CesiumImage/ImageAsset.h>
#include <CesiumImage/Library.h>
#include <CesiumUtility/IntrusivePointer.h>
 
#include <optional>
#include <span>
#include <string>
#include <vector>
 
namespace CesiumImage {
 
struct Ktx2TranscodeTargets;

struct CESIUMIMAGE_API ImageReaderResult {

  CesiumUtility::IntrusivePointer<ImageAsset> pImage;

  std::vector<std::string> errors;

  std::vector<std::string> warnings;
};

class ImageDecoder {
public:
  static ImageReaderResult readImage(
      const std::span<const std::byte>& data,
      const Ktx2TranscodeTargets& ktx2TranscodeTargets);

  static std::optional<std::string> generateMipMaps(ImageAsset& image);

  static bool unsafeResize(
      const std::byte* pInputPixels,
      int32_t inputWidth,
      int32_t inputHeight,
      int32_t inputStrideBytes,
      std::byte* pOutputPixels,
      int32_t outputWidth,
      int32_t outputHeight,
      int32_t outputStrideBytes,
      int32_t channels);
};
 
} // namespace CesiumImage