dpnminfo.h

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/* ////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2004-2005 Intel Corporation. All Rights Reserved.
//
//
//
*/

#ifndef __DPNMINFO_H__
#define __DPNMINFO_H__

#include "pnminfo.h"
#include "stricmp.h"
#include "diagndescr.h"
#include "dpnmwarning.h"

class DPNMInfo : public PNMInfo
{
public:
    DPNMInfo() {}

    void AttachDiagnOutput(BDiagnOutput &diagnOutput) { m_diagnOutputPtr = diagnOutput; }

    template<class ByteInput>
        void Read(ByteInput &stream)
    {
        SetMagicNumber(ReadPNMMagicNumber(stream));

        unsigned int width  = GetIntegerFromPNMHeader(stream);
        unsigned int height = GetIntegerFromPNMHeader(stream);

        SetSize(RectSize(width, height));

        if(ColorFormat(MagicNumber()) != PNM_BLACKNWHITE)
            SetMaxValue(GetIntegerFromPNMHeader(stream));
        else
            SetMaxValue(1);
    }

    void CheckMagicNumberConformance(const char *fileExt)
    {
        if(0 == Stricmp(fileExt, "pnm")) return;

        if(!( 0 == Stricmp(fileExt, SpecFileNameExt(ColorFormat(MagicNumber()))) ))
            m_diagnOutputPtr->Warning(DiagnDescrCT<DPNMWarning, WrongPNMMagicNumber>());
    }

protected:
    BDiagnOutputPtr m_diagnOutputPtr;

    using PNMInfo::SetMagicNumber;
    using PNMInfo::SetMaxValue;
    using PNMInfo::SetSize;
};


//
// the best place for it is DPNMInfo,
// but some compilers do not correctly compile static template members
//
//

template<class ByteInput>
PNMMagicNumber ReadPNMMagicNumber(ByteInput &stream)
{
    unsigned int magic = stream.Read16u();

    switch(magic)
    {
    case PNM_PBM_TXT:
    case PNM_PGM_TXT:
    case PNM_PPM_TXT:
    case PNM_PBM_BIN:
    case PNM_PGM_BIN:
    case PNM_PPM_BIN:
        break;
    default: throw DiagnDescrCT<DPNMException,WrongPNMMagicNumberException>();
    }

    return (PNMMagicNumber)magic;
}

template<class ByteInput>
unsigned int GetIntegerFromPNMHeader(ByteInput &stream)
{
    unsigned char symbol;
    unsigned char number[INT_TO_STR_MAX_SIZE];
    unsigned int i = 1;

    symbol = stream.Read8u();
    while(symbol < '0' || symbol > '9')
    {
        if(symbol == '#')
            while(stream.Read8u() != '\n');
        symbol = stream.Read8u();
    }

    number[0] = symbol;
    while(symbol >= '0' && symbol <= '9' && i < INT_TO_STR_MAX_SIZE)
    {
        number[i] = symbol = stream.Read8u();
        i++;
    }
    number[i - 1] = 0;

    if(symbol == '#')
        while(stream.Read8u() != '\n');

    return atoi((const char *)number);
}

#endif // __DPNMINFO_H__