windows-server-2003/printscan/wia/common/jpeglib/jpegapi.h

/* jpegapi.h -- header file for JPEG image compression interface.
 * Written by Ajai Sehgal
 * (c) Copyright Microsoft Corporation
 *
 *  08-27-1997 (kurtgeis) Removed dependency on Gromit/Fletcher funky data
 *  types and includes.
 */

#include "jinclude.h"
#include "jpeglib.h"
#include "jerror.h"     /* get library error codes too */

#include "jmemfile.h"


#ifndef __JPEGAPI_H__
#define __JPEGAPI_H__

#define ALIGNIT(ap,t) \
    ((((size_t)(ap))+(sizeof(t)<8?3:7)) & (sizeof(t)<8?~3:~7))

class THROWN
{
public:
    // Default constructor
    THROWN()
    {
        m_hr = S_OK;
    }

    // THROWN( HRESULT)
    //
    // Purpose:
    //      Construct a throw object for an hresult.
    //
    THROWN( HRESULT hr )
    {
        m_hr = hr;
    }

    HRESULT Hr() { return m_hr; }       // The HRESULT thrown

 private:
    HRESULT m_hr;                       // Associated HResult;
};

// Destroy the JPEG handle
HRESULT DestroyJPEGCompressHeader(HANDLE hJpegC);
HRESULT DestroyJPEGDecompressHeader(HANDLE hJpegD);

// Takes the parameters for a tile write and creates a JPEG table for it
HRESULT JPEGCompressHeader(BYTE *prgbJPEGBuf, UINT tuQuality, ULONG *pcbOut, HANDLE *phJpegC, J_COLOR_SPACE ColorSpace );
HRESULT JPEGDecompressHeader(BYTE *prgbJPEGBuf, HANDLE *phJpegD, ULONG ulBufferSize );

// Takes a raw RGBA image buffer and spits back a JPEG data stream.
HRESULT JPEGFromRGBA(BYTE *prgbImage, BYTE *prgbJPEGBuf,UINT tuQuality, ULONG *pcbOut, HANDLE hJpegC,J_COLOR_SPACE ColorSpace, UINT nWidth, UINT nHeight );

// Takes a JPEG data stream and spits back a raw RGBA image buffer.
// iraklis's comment: the second argument is the RGBA buffer to be
// loaded with the decompressed tile; we are
// asserting that it is of the right size (i.e. sizeof (TIL))
HRESULT RGBAFromJPEG(BYTE *prgbJPEG, BYTE *prgbImage, HANDLE hJpegD, ULONG ulBufferSize, BYTE bJPEGConversions, ULONG *pulReturnedNumChannels, UINT nWidth, UINT nHeight );

HRESULT
GetJPEGHeaderFields(
    HANDLE  hJpegC,
    UINT    *pWidth,
    UINT    *pHeight,
    INT     *pNumComponents,
    J_COLOR_SPACE   *pColorSpace
    );

BOOL
WINAPI
Win32DIBFromJPEG(
    BYTE    *prgbJPEG,
    ULONG   ulBufferSize,
    LPBITMAPINFO  pbmi,
    HBITMAP *phBitmap ,
    PVOID       *ppvBits
    );

#endif  // __JPEGAPI_H__