JpegImageWrapper.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "ImageWrapperBase.h"
 
#if WITH_UNREALJPEG
 
#if WITH_LIBJPEGTURBO
using tjhandle = void*;
#endif  // WITH_LIBJPEGTURBO
 
class FJpegImageWrapper
    : public FImageWrapperBase
{
public:
 
    // NumComponents == 1 for GrayscaleJPEG , but not supported by TJPEG path so currently broken
    FJpegImageWrapper(int32 InNumComponents = 4);
 
    virtual ~FJpegImageWrapper();
    virtual void Reset() override;
 
public:
 
    //~ FImageWrapperBase interface
 
    virtual bool SetCompressed(const void* InCompressedData, int64 InCompressedSize) override;
    virtual void Uncompress(const ERGBFormat InFormat, int32 InBitDepth) override;
    virtual void Compress(int32 Quality) override;
    
    virtual bool CanSetRawFormat(const ERGBFormat InFormat, const int32 InBitDepth) const override;
    virtual ERawImageFormat::Type GetSupportedRawFormat(const ERawImageFormat::Type InFormat) const override;
 
private:
 
    int32 NumComponents;
    
#if WITH_LIBJPEGTURBO
    bool SetCompressedTurbo(const void* InCompressedData, int64 InCompressedSize);
    void CompressTurbo(int32 Quality);
    void UncompressTurbo(const ERGBFormat InFormat, int32 InBitDepth);
#endif  // WITH_LIBJPEGTURBO
 
#if WITH_LIBJPEGTURBO
    tjhandle Decompressor;
#endif  // WITH_LIBJPEGTURBO
};
 
 
#endif //WITH_JPEG