BeJpeg.h

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/*--------------------------------------------------------------------------------------+
|
|   Supplied under applicable software license agreement.
|
|   Copyright (c) 2018 Bentley Systems, Incorporated. All rights reserved.
|
+---------------------------------------------------------------------------------------*/
#pragma once

#include <Bentley/ByteStream.h> 

BEGIN_BENTLEY_NAMESPACE

//=======================================================================================
// @bsiclass                                                     Bentley Systems
//=======================================================================================
enum BeJpegPixelType
    {
    BE_JPEG_PIXELTYPE_Rgb,
    BE_JPEG_PIXELTYPE_RgbA,
    BE_JPEG_PIXELTYPE_Bgr,
    BE_JPEG_PIXELTYPE_BgrA,
    BE_JPEG_PIXELTYPE_Gray
    };

enum class BeJpegBottomUp {No=0, Yes=1};

//=======================================================================================
// @bsiclass                                                     Bentley Systems
//=======================================================================================
struct BeJpegDecompressor
    {
private:
    void* m_jpegImpl;

public:
    BeJpegDecompressor();

    ~BeJpegDecompressor();

    BentleyStatus ReadHeader(uint32_t& width, uint32_t& height, Byte const* jpegBuffer, size_t jpegBufferSize);

    BentleyStatus Decompress(Byte* pOutBuffer, size_t outBufferSize, Byte const* jpegBuffer, size_t jpegBufferSize, BeJpegPixelType pixelType, BeJpegBottomUp bottomUp=BeJpegBottomUp::No);
    };

//=======================================================================================
// @bsiclass                                                     Bentley Systems
//=======================================================================================
struct BeJpegCompressor
    {
private:
    void* m_jpegImpl;

public:
    BeJpegCompressor();

    ~BeJpegCompressor();

    BentleyStatus Compress(ByteStream& outBuf, uint8_t const* srcBuffer, uint32_t width, uint32_t height, BeJpegPixelType pixelType, int quality, BeJpegBottomUp bottomUp=BeJpegBottomUp::No);

    BentleyStatus Compress(ByteStream& outBuf, uint8_t const* srcBuffer, size_t srcPitch, uint32_t width, uint32_t height, BeJpegPixelType pixelType, int quality, BeJpegBottomUp bottomUp=BeJpegBottomUp::No);
    };

END_BENTLEY_NAMESPACE