// ShapeArabic
//
void Typesetter::ShapeArabic(eastl_size_t iCharBegin, eastl_size_t iCharEnd)
{
EA_ASSERT(iCharEnd <= mLineLayout.mCharArray.size());
const OTF* const pOTF = mLineLayout.mAnalysisInfoArray[0].mpFont->GetOTF();
// We more or less need to have OpenType font information in order to correctly display Arabic.
if(pOTF && pOTF->IsScriptSupported("arab"))
{
const eastl_size_t iGlyphBegin = mLineLayout.GetGlyphIndexFromCharIndex(iCharBegin);
for(eastl_size_t i = iCharBegin, charCount = 0; i < iCharEnd; i += charCount)
{
const AnalysisInfo* const pAnalysisInfo = &mLineLayout.mAnalysisInfoArray[i];
Char pCharCluster[kMaxArabicCharClusterSize];
eastl_size_t charClusterSize = 0;
charCount = GetGeneralCharCluster(i, iCharEnd, pCharCluster, charClusterSize);
for(eastl_size_t c = 0, charsEaten = 0, glyphCount = 0, glyphCountPrev = 0; c < charClusterSize; c += charsEaten)
{
GlyphId pGlyphIdArray[kMaxArabicGlyphClusterSize];
charsEaten = GetGlyphsForChar(pCharCluster + c, charClusterSize - c, pAnalysisInfo, pGlyphIdArray + glyphCount, glyphCount);
AppendArabicGlyphCluster(iCharBegin, charCount, pCharCluster + c, charsEaten,
pGlyphIdArray + glyphCountPrev, glyphCount - glyphCountPrev,
pAnalysisInfo->mnBidiLevel, pOTF);
glyphCountPrev = glyphCount;
}
}
// Do OpenType substitutions.
FeatureLookupArray featureLookupArray;
SetupArabicGsubLookup(featureLookupArray, pOTF);
AssignArabicCharProperties(&mLineLayout.mCharArray[iCharBegin], iCharEnd - iCharBegin, &mLineLayout.mGlyphInfoArray[iGlyphBegin]);
DoGlyphSubstitution(mLineLayout, iGlyphBegin, featureLookupArray, pOTF);
CompleteLineLayoutArrays(iCharBegin, iCharEnd, iGlyphBegin);
PlaceGeneralGlyphCluster(iCharBegin, iCharEnd - iCharBegin);
}
else
{
// Generic fallback. Arabic text will look wrong, but at least something will be displayed.
ShapeGeneral(iCharBegin, iCharEnd);
}
}
void Typesetter::ShapeIndic(eastl_size_t iBegin, eastl_size_t iCharEnd)
{
// To do: Complete this shaper.
ShapeGeneral(iBegin, iCharEnd);
}
