/**
* <JA>
* @brief 第1パスのビーム幅を決定する.
*
* ユーザが "-b" オプションでビーム幅を指定しなかった場合は，
* 下記のうち小さい方がビーム幅として採用される.
* - default_width() の値
* - sqrt(語彙数) * 15
*
* @param wchmm [in] 木構造化辞書
* @param specified [in] ユーザ指定ビーム幅(0: 全探索 -1: 未指定)
*
* @return 採用されたビーム幅.
* </JA>
* <EN>
* @brief Determine beam width on the 1st pass.
*
* @param wchmm [in] tree lexicon data
* @param specified [in] user-specified beam width (0: full search,
* -1: not specified)
*
* @return the final beam width to be used.
* </EN>
*
* @callgraph
* @callergraph
*/
int
set_beam_width(WCHMM_INFO *wchmm, int specified)
{
int width;
int standard_width;
if (specified == 0) { /* full search */
jlog("WARNING: doing full search (can be extremely slow)\n");
width = wchmm->n;
} else if (specified == -1) { /* not specified */
standard_width = default_width(wchmm->hmminfo); /* system default */
width = (int)(sqrt(wchmm->winfo->num) * 15.0); /* heuristic value!! */
if (width > standard_width) width = standard_width;
/* 2007/1/20 bgn */
if (width < MINIMAL_BEAM_WIDTH) {
width = MINIMAL_BEAM_WIDTH;
}
/* 2007/1/20 end */
} else { /* actual value has been specified */
width = specified;
}
if (width > wchmm->n) width = wchmm->n;
return(width);
}
PdfFontMetricsObject::PdfFontMetricsObject( PdfObject* pFont, PdfObject* pDescriptor, const PdfEncoding* const pEncoding )
: PdfFontMetrics( ePdfFontType_Unknown, "", NULL ),
m_pEncoding( pEncoding ), m_dDefWidth(0.0)
{
if( !pDescriptor )
{
PODOFO_RAISE_ERROR( ePdfError_InvalidHandle );
}
const PdfName & rSubType = pFont->GetDictionary().GetKey( PdfName::KeySubtype )->GetName();
// OC 15.08.2010 BugFix: /FirstChar /LastChar /Widths are in the Font dictionary and not in the FontDescriptor
if ( rSubType == PdfName("Type1") || rSubType == PdfName("TrueType") ) {
m_sName = pDescriptor->GetIndirectKey( "FontName" )->GetName();
m_bbox = pDescriptor->GetIndirectKey( "FontBBox" )->GetArray();
m_nFirst = static_cast<int>(pFont->GetDictionary().GetKeyAsLong( "FirstChar", 0L ));
m_nLast = static_cast<int>(pFont->GetDictionary().GetKeyAsLong( "LastChar", 0L ));
// OC 15.08.2010 BugFix: GetIndirectKey() instead of GetDictionary().GetKey() and "Widths" instead of "Width"
PdfObject* widths = pFont->GetIndirectKey( "Widths" );
if( widths != NULL )
{
m_width = widths->GetArray();
m_missingWidth = NULL;
}
else
{
widths = pDescriptor->GetDictionary().GetKey( "MissingWidth" );
if( widths == NULL )
{
PODOFO_RAISE_ERROR_INFO( ePdfError_NoObject, "Font object defines neither Widths, nor MissingWidth values!" );
m_missingWidth = widths;
}
}
} else if ( rSubType == PdfName("CIDFontType0") || rSubType == PdfName("CIDFontType2") ) {
PdfObject *pObj = pDescriptor->GetIndirectKey( "FontName" );
if (pObj) {
m_sName = pObj->GetName();
}
pObj = pDescriptor->GetIndirectKey( "FontBBox" );
if (pObj) {
m_bbox = pObj->GetArray();
}
m_nFirst = 0;
m_nLast = 0;
m_dDefWidth = static_cast<double>(pFont->GetDictionary().GetKeyAsLong( "DW", 1000L ));
PdfVariant default_width(m_dDefWidth);
PdfObject * pw = pFont->GetIndirectKey( "W" );
for (int i = m_nFirst; i <= m_nLast; ++i) {
m_width.push_back(default_width);
}
if (pw) {
PdfArray w = pw->GetArray();
int pos = 0;
while (pos < static_cast<int>(w.GetSize())) {
int start = static_cast<int>(w[pos++].GetNumber());
PODOFO_ASSERT (start >= 0);
if (w[pos].IsArray()) {
PdfArray widths = w[pos++].GetArray();
int length = start + static_cast<int>(widths.GetSize());
PODOFO_ASSERT (length >= start);
if (length > static_cast<int>(m_width.GetSize())) {
m_width.resize(length, default_width);
}
for (int i = 0; i < static_cast<int>(widths.GetSize()); ++i) {
m_width[start + i] = widths[i];
}
} else {
int end = static_cast<int>(w[pos++].GetNumber());
int length = start + end;
PODOFO_ASSERT (length >= start);
if (length > static_cast<int>(m_width.GetSize())) {
m_width.resize(length, default_width);
}
pdf_int64 width = w[pos++].GetNumber();
for (int i = start; i <= end; ++i)
m_width[i] = PdfVariant(width);
}
}
}
m_nLast = m_width.GetSize() - 1;
} else {
PODOFO_RAISE_ERROR_INFO( ePdfError_UnsupportedFontFormat, rSubType.GetEscapedName().c_str() );
}
m_nWeight = static_cast<unsigned int>(pDescriptor->GetDictionary().GetKeyAsLong( "FontWeight", 400L ));
m_nItalicAngle = static_cast<int>(pDescriptor->GetDictionary().GetKeyAsLong( "ItalicAngle", 0L ));
m_dPdfAscent = pDescriptor->GetDictionary().GetKeyAsReal( "Ascent", 0.0 );
m_dAscent = m_dPdfAscent / 1000.0;
m_dPdfDescent = pDescriptor->GetDictionary().GetKeyAsReal( "Descent", 0.0 );
m_dDescent = m_dPdfDescent / 1000.0;
m_dLineSpacing = m_dAscent + m_dDescent;
// Try to fine some sensible values
m_dUnderlineThickness = 1.0;
m_dUnderlinePosition = 0.0;
m_dStrikeOutThickness = m_dUnderlinePosition;
m_dStrikeOutPosition = m_dAscent / 2.0;
m_bSymbol = false; // TODO
}
