mitab_tooldef.cpp

mitab,读取MapInfo的地图文件

 **********************************************************************/
int     TABToolDefTable::GetNumPen()
{
    return m_numPen;
}

/**********************************************************************
 *                   TABToolDefTable::GetPenDefRef()
 *
 * Return a reference to the specified Pen tool definition, or NULL if
 * specified index is invalid.
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
TABPenDef *TABToolDefTable::GetPenDefRef(int nIndex)
{
    if (nIndex >0 && nIndex <= m_numPen)
        return m_papsPen[nIndex-1];

    return NULL;
}

/**********************************************************************
 *                   TABToolDefTable::AddPenDefRef()
 *
 * Either create a new PenDefRef or add a reference to an existing one.
 *
 * Return the pen index that has been attributed to this Pen tool 
 * definition, or -1 if something went wrong
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
int TABToolDefTable::AddPenDefRef(TABPenDef *poNewPenDef)
{
    int i, nNewPenIndex = 0;
    TABPenDef *poDef;

    if (poNewPenDef == NULL)
        return -1;

    /*-----------------------------------------------------------------
     * Check for "none" case: pattern = 0 (pattern 0 does not exist!)
     *----------------------------------------------------------------*/
    if (poNewPenDef->nLinePattern < 1)
        return 0;

    /*-----------------------------------------------------------------
     * Start by searching the list of existing pens
     *----------------------------------------------------------------*/
    for (i=0; nNewPenIndex == 0 && i<m_numPen; i++)
    {
        poDef = m_papsPen[i];
        if (poDef->nPixelWidth == poNewPenDef->nPixelWidth &&
            poDef->nLinePattern == poNewPenDef->nLinePattern &&
            poDef->nPointWidth == poNewPenDef->nPointWidth &&
            poDef->rgbColor == poNewPenDef->rgbColor)
        {
            nNewPenIndex = i+1; // Fount it!
            poDef->nRefCount++;
        }               
    }

    /*-----------------------------------------------------------------
     * OK, we did not find a match, then create a new entry
     *----------------------------------------------------------------*/
    if (nNewPenIndex == 0)
    {
        if (m_numPen >= m_numAllocatedPen)
        {
            // Realloc array by blocks of 20 items
            m_numAllocatedPen += 20;
            m_papsPen = (TABPenDef**)CPLRealloc(m_papsPen, 
                                       m_numAllocatedPen*sizeof(TABPenDef*));
        }
        m_papsPen[m_numPen] = (TABPenDef*)CPLCalloc(1, sizeof(TABPenDef));

        *m_papsPen[m_numPen] = *poNewPenDef;
        m_papsPen[m_numPen]->nRefCount = 1;
        nNewPenIndex = ++m_numPen;
    }

    return nNewPenIndex;
}

/**********************************************************************
 *                   TABToolDefTable::GetNumBrushes()
 *
 * Return the number of valid Brush indexes for this .MAP file
 **********************************************************************/
int     TABToolDefTable::GetNumBrushes()
{
    return m_numBrushes;
}

/**********************************************************************
 *                   TABToolDefTable::GetBrushDefRef()
 *
 * Return a reference to the specified Brush tool definition, or NULL if
 * specified index is invalid.
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
TABBrushDef *TABToolDefTable::GetBrushDefRef(int nIndex)
{
    if (nIndex >0 && nIndex <= m_numBrushes)
        return m_papsBrush[nIndex-1];

    return NULL;
}

/**********************************************************************
 *                   TABToolDefTable::AddBrushDefRef()
 *
 * Either create a new BrushDefRef or add a reference to an existing one.
 *
 * Return the Brush index that has been attributed to this Brush tool 
 * definition, or -1 if something went wrong
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
int TABToolDefTable::AddBrushDefRef(TABBrushDef *poNewBrushDef)
{
    int i, nNewBrushIndex = 0;
    TABBrushDef *poDef;

    if (poNewBrushDef == NULL)
        return -1;

    /*-----------------------------------------------------------------
     * Check for "none" case: pattern = 0 (pattern 0 does not exist!)
     *----------------------------------------------------------------*/
    if (poNewBrushDef->nFillPattern < 1)
        return 0;

    /*-----------------------------------------------------------------
     * Start by searching the list of existing Brushs
     *----------------------------------------------------------------*/
    for (i=0; nNewBrushIndex == 0 && i<m_numBrushes; i++)
    {
        poDef = m_papsBrush[i];
        if (poDef->nFillPattern == poNewBrushDef->nFillPattern &&
            poDef->bTransparentFill == poNewBrushDef->bTransparentFill &&
            poDef->rgbFGColor == poNewBrushDef->rgbFGColor &&
            poDef->rgbBGColor == poNewBrushDef->rgbBGColor)
        {
            nNewBrushIndex = i+1; // Fount it!
            poDef->nRefCount++;
        }               
    }

    /*-----------------------------------------------------------------
     * OK, we did not find a match, then create a new entry
     *----------------------------------------------------------------*/
    if (nNewBrushIndex == 0)
    {
        if (m_numBrushes >= m_numAllocatedBrushes)
        {
            // Realloc array by blocks of 20 items
            m_numAllocatedBrushes += 20;
            m_papsBrush = (TABBrushDef**)CPLRealloc(m_papsBrush, 
                                 m_numAllocatedBrushes*sizeof(TABBrushDef*));
        }
        m_papsBrush[m_numBrushes]=(TABBrushDef*)CPLCalloc(1, 
                                                          sizeof(TABBrushDef));

        *m_papsBrush[m_numBrushes] = *poNewBrushDef;
        m_papsBrush[m_numBrushes]->nRefCount = 1;
        nNewBrushIndex = ++m_numBrushes;
    }

    return nNewBrushIndex;
}

/**********************************************************************
 *                   TABToolDefTable::GetNumFonts()
 *
 * Return the number of valid Font indexes for this .MAP file
 **********************************************************************/
int     TABToolDefTable::GetNumFonts()
{
    return m_numFonts;
}

/**********************************************************************
 *                   TABToolDefTable::GetFontDefRef()
 *
 * Return a reference to the specified Font tool definition, or NULL if
 * specified index is invalid.
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
TABFontDef *TABToolDefTable::GetFontDefRef(int nIndex)
{
    if (nIndex >0 && nIndex <= m_numFonts)
        return m_papsFont[nIndex-1];

    return NULL;
}

/**********************************************************************
 *                   TABToolDefTable::AddFontDefRef()
 *
 * Either create a new FontDefRef or add a reference to an existing one.
 *
 * Return the Font index that has been attributed to this Font tool 
 * definition, or -1 if something went wrong
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
int TABToolDefTable::AddFontDefRef(TABFontDef *poNewFontDef)
{
    int i, nNewFontIndex = 0;
    TABFontDef *poDef;

    if (poNewFontDef == NULL)
        return -1;

    /*-----------------------------------------------------------------
     * Start by searching the list of existing Fonts
     *----------------------------------------------------------------*/
    for (i=0; nNewFontIndex == 0 && i<m_numFonts; i++)
    {
        poDef = m_papsFont[i];
        if (EQUAL(poDef->szFontName, poNewFontDef->szFontName))
        {
            nNewFontIndex = i+1; // Fount it!
            poDef->nRefCount++;
        }               
    }

    /*-----------------------------------------------------------------
     * OK, we did not find a match, then create a new entry
     *----------------------------------------------------------------*/
    if (nNewFontIndex == 0)
    {
        if (m_numFonts >= m_numAllocatedFonts)
        {
            // Realloc array by blocks of 20 items
            m_numAllocatedFonts += 20;
            m_papsFont = (TABFontDef**)CPLRealloc(m_papsFont, 
                                 m_numAllocatedFonts*sizeof(TABFontDef*));
        }
        m_papsFont[m_numFonts]=(TABFontDef*)CPLCalloc(1, 
                                                          sizeof(TABFontDef));

        *m_papsFont[m_numFonts] = *poNewFontDef;
        m_papsFont[m_numFonts]->nRefCount = 1;
        nNewFontIndex = ++m_numFonts;
    }

    return nNewFontIndex;
}

/**********************************************************************
 *                   TABToolDefTable::GetNumSymbols()
 *
 * Return the number of valid Symbol indexes for this .MAP file
 **********************************************************************/
int     TABToolDefTable::GetNumSymbols()
{
    return m_numSymbols;
}

/**********************************************************************
 *                   TABToolDefTable::GetSymbolDefRef()
 *
 * Return a reference to the specified Symbol tool definition, or NULL if
 * specified index is invalid.
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
TABSymbolDef *TABToolDefTable::GetSymbolDefRef(int nIndex)
{
    if (nIndex >0 && nIndex <= m_numSymbols)
        return m_papsSymbol[nIndex-1];

    return NULL;
}


/**********************************************************************
 *                   TABToolDefTable::AddSymbolDefRef()
 *
 * Either create a new SymbolDefRef or add a reference to an existing one.
 *
 * Return the Symbol index that has been attributed to this Symbol tool 
 * definition, or -1 if something went wrong
 *
 * Note that nIndex is a 1-based index.  A value of 0 indicates "none" 
 * in MapInfo.
 **********************************************************************/
int TABToolDefTable::AddSymbolDefRef(TABSymbolDef *poNewSymbolDef)
{
    int i, nNewSymbolIndex = 0;
    TABSymbolDef *poDef;

    if (poNewSymbolDef == NULL)
        return -1;

    /*-----------------------------------------------------------------
     * Start by searching the list of existing Symbols
     *----------------------------------------------------------------*/
    for (i=0; nNewSymbolIndex == 0 && i<m_numSymbols; i++)
    {
        poDef = m_papsSymbol[i];
        if (poDef->nSymbolNo == poNewSymbolDef->nSymbolNo &&
            poDef->nPointSize == poNewSymbolDef->nPointSize &&
            poDef->_nUnknownValue_ == poNewSymbolDef->_nUnknownValue_ &&
            poDef->rgbColor == poNewSymbolDef->rgbColor )
        {
            nNewSymbolIndex = i+1; // Fount it!
            poDef->nRefCount++;
        }               
    }

    /*-----------------------------------------------------------------
     * OK, we did not find a match, then create a new entry
     *----------------------------------------------------------------*/
    if (nNewSymbolIndex == 0)
    {
        if (m_numSymbols >= m_numAllocatedSymbols)
        {
            // Realloc array by blocks of 20 items
            m_numAllocatedSymbols += 20;
            m_papsSymbol = (TABSymbolDef**)CPLRealloc(m_papsSymbol, 
                                 m_numAllocatedSymbols*sizeof(TABSymbolDef*));
        }
        m_papsSymbol[m_numSymbols]=(TABSymbolDef*)CPLCalloc(1, 
                                                       sizeof(TABSymbolDef));

        *m_papsSymbol[m_numSymbols] = *poNewSymbolDef;
        m_papsSymbol[m_numSymbols]->nRefCount = 1;
        nNewSymbolIndex = ++m_numSymbols;
    }

    return nNewSymbolIndex;
}


/**********************************************************************
 *                   TABToolDefTable::GetMinVersionNumber()
 *
 * Returns the minimum file version number that can accept all the
 * tool objects currently defined.
 *
 * Default is 300, and currently 450 can be returned if file contains
 * pen widths defined in points.
 **********************************************************************/
int     TABToolDefTable::GetMinVersionNumber()
{
    int i, nVersion = 300;

    /*-----------------------------------------------------------------
     * Scan Pen Defs
     *----------------------------------------------------------------*/
    for(i=0; i< m_numPen; i++)
    {
        if (m_papsPen[i]->nPointWidth > 0 )
        {
            nVersion = MAX(nVersion, 450);  // Raise version to 450
        }
    }

    return nVersion;
}