/*----------------------------------------------------------------------------------------------
A convenient way to initialize a graphite renderer when we don't have an IVwGraphics
around. When one is readily available, just call InitRenderer directly.
----------------------------------------------------------------------------------------------*/
void GrUtil::InitGraphiteRenderer(IRenderEngine * preneng, const OLECHAR * pszFace,
bool fBold, bool fItalic, BSTR bstrFontVar, int nTrace)
{
LgCharRenderProps chrp;
wcscpy_s(chrp.szFaceName, pszFace);
chrp.ttvBold = fBold ? kttvForceOn : kttvOff;
chrp.ttvItalic = fItalic ? kttvForceOn : kttvOff;
chrp.dympHeight = 12000; // arbitrary to make it something reasonable (12 points)
IVwGraphicsWin32Ptr qvg;
qvg.CreateInstance(CLSID_VwGraphicsWin32);
HDC hdc = ::CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
try {
qvg->Initialize(hdc); // puts the DC in the right state
qvg->SetupGraphics(&chrp);
CheckHr(preneng->InitRenderer(qvg, bstrFontVar));
// Set the trace options (e.g. logging).
ComSmartPtr<ITraceControl> qtreng;
CheckHr(preneng->QueryInterface(IID_ITraceControl, (void**)&qtreng));
CheckHr(qtreng->SetTracing(nTrace));
}
catch (...)
{
}
qvg.Clear();
::DeleteDC(hdc);
}
/*----------------------------------------------------------------------------------------------
See if there are Graphite tables in the font, or failing that, an indication of the
Graphite font in the registry.
----------------------------------------------------------------------------------------------*/
bool GrUtil::FontHasGraphiteTables(const OLECHAR * pszFace, bool fBold, bool fItalic)
{
bool fGraphite = false;
LgCharRenderProps chrp;
wcscpy_s(chrp.szFaceName, pszFace);
chrp.ttvBold = fBold ? kttvForceOn : kttvOff;
chrp.ttvItalic = fItalic ? kttvForceOn : kttvOff;
chrp.dympHeight = 12000; // arbitrary to make it something reasonable (12 points)
IVwGraphicsWin32Ptr qvg;
qvg.CreateInstance(CLSID_VwGraphicsWin32);
HDC hdc = ::CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
try {
qvg->Initialize(hdc); // puts the DC in the right state
qvg->SetupGraphics(&chrp);
//FwGrGraphics gg(qvg.Ptr());
//fGraphite = GrUtil::FontHasGraphiteTables(&gg);
fGraphite = GrUtil::FontHasGraphiteTables(qvg);
}
catch (...)
{
}
qvg.Clear();
::DeleteDC(hdc);
return fGraphite;
}
/*----------------------------------------------------------------------------------------------
Return the size of the text, in points.
----------------------------------------------------------------------------------------------*/
float FwGrTxtSrc::getVerticalOffset(toffset ich)
{
LgCharRenderProps lgchrp;
int ichMinBogus, ichLimBogus;
GrResult res = (GrResult)m_qts->GetCharProps(GrToVwOffset(ich), &lgchrp, &ichMinBogus, &ichLimBogus);
int dympOffset = lgchrp.dympOffset;
if(lgchrp.ssv != kssvOff)
{
// psuedo device context works since we are getting proportions which are invariant
HDC hdc = ::CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL);
IVwGraphicsWin32Ptr qvgW;
qvgW.CreateInstance(CLSID_VwGraphicsWin32);
qvgW->Initialize(hdc);
IVwGraphicsPtr qvg;
CheckHr(qvgW->QueryInterface(IID_IVwGraphics, (void **) &qvg));
CheckHr(qvg->SetupGraphics(&lgchrp));
if (lgchrp.ssv == kssvSuper)
{
int dSuperscriptYOffsetNumerator;
int dSuperscriptYOffsetDenominator;
CheckHr(qvg->GetSuperscriptYOffsetRatio(&dSuperscriptYOffsetNumerator, &dSuperscriptYOffsetDenominator));
dympOffset += gr::GrEngine::GrIntMulDiv(lgchrp.dympHeight, dSuperscriptYOffsetNumerator, dSuperscriptYOffsetDenominator);
}
else if (lgchrp.ssv == kssvSub)
{
int dSubscriptYOffsetNumerator;
int dSubscriptYOffsetDenominator;
CheckHr(qvg->GetSubscriptYOffsetRatio(&dSubscriptYOffsetNumerator, &dSubscriptYOffsetDenominator));
dympOffset -= gr::GrEngine::GrIntMulDiv(lgchrp.dympHeight, dSubscriptYOffsetNumerator, dSubscriptYOffsetDenominator);
}
qvgW.Clear();
qvg.Clear();
::DeleteDC(hdc);
}
return (float)(dympOffset / 1000);
}
