OpenTypeLayoutEngine::OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, LEErrorCode &success)
: LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fFeatureOrder(FALSE),
fGSUBTable(NULL), fGDEFTable(NULL), fGPOSTable(NULL), fSubstitutionFilter(NULL)
{
setScriptAndLanguageTags();
}
OpenTypeLayoutEngine::OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable, LEErrorCode &success)
: LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fFeatureMask(minimalFeatures),
fFeatureMap(featureMap), fFeatureMapCount(featureMapCount), fFeatureOrder(FALSE),
fGSUBTable(gsubTable), fGDEFTable(NULL), fGPOSTable(NULL), fSubstitutionFilter(NULL)
{
static const le_uint32 gdefTableTag = LE_GDEF_TABLE_TAG;
static const le_uint32 gposTableTag = LE_GPOS_TABLE_TAG;
const GlyphPositioningTableHeader *gposTable = (const GlyphPositioningTableHeader *) getFontTable(gposTableTag);
// todo: switch to more flags and bitfield rather than list of feature tags?
switch (typoFlags & ~0x80000000L) {
case 0: break; // default
case 1: fFeatureMask = kernFeatures; break;
case 2: fFeatureMask = ligaFeatures; break;
case 3: fFeatureMask = kernAndLigaFeatures; break;
default: break;
}
if (typoFlags & 0x80000000L) {
fSubstitutionFilter = new CharSubstitutionFilter(fontInstance);
}
setScriptAndLanguageTags();
fGDEFTable = (const GlyphDefinitionTableHeader *) getFontTable(gdefTableTag);
// JK patch, 2008-05-30 - see Sinhala bug report and LKLUG font
// if (gposTable != NULL && gposTable->coversScriptAndLanguage(fScriptTag, fLangSysTag)) {
if (gposTable != NULL && gposTable->coversScript(fScriptTag)) {
fGPOSTable = gposTable;
}
}
OpenTypeLayoutEngine::OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable)
: LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags), fFeatureList(minimalFeatures), fFeatureOrder(NULL),
fGSUBTable(gsubTable), fGDEFTable(NULL), fGPOSTable(NULL), fSubstitutionFilter(NULL)
{
static const le_uint32 gdefTableTag = LE_GDEF_TABLE_TAG;
static const le_uint32 gposTableTag = LE_GPOS_TABLE_TAG;
const GlyphPositioningTableHeader *gposTable = (const GlyphPositioningTableHeader *) getFontTable(gposTableTag);
// todo: switch to more flags and bitfield rather than list of feature tags?
switch (typoFlags) {
case 0: break; // default
case 1: fFeatureList = kernFeatures; break;
case 2: fFeatureList = ligaFeatures; break;
case 3: fFeatureList = kernAndLigaFeatures; break;
default: break;
}
setScriptAndLanguageTags();
fGDEFTable = (const GlyphDefinitionTableHeader *) getFontTable(gdefTableTag);
if (gposTable != NULL && gposTable->coversScriptAndLanguage(fScriptTag, fLangSysTag)) {
fGPOSTable = gposTable;
}
}
OpenTypeLayoutEngine::OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success)
: LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fFeatureMask(minimalFeatures),
fFeatureMap(featureMap), fFeatureMapCount(featureMapCount), fFeatureOrder(FALSE),
fGSUBTable(gsubTable),
fGDEFTable(fontInstance, LE_GDEF_TABLE_TAG, success),
fGPOSTable(fontInstance, LE_GPOS_TABLE_TAG, success), fSubstitutionFilter(NULL)
{
applyTypoFlags();
setScriptAndLanguageTags();
// JK patch, 2008-05-30 - see Sinhala bug report and LKLUG font
// if (gposTable != NULL && gposTable->coversScriptAndLanguage(fScriptTag, fLangSysTag)) {
if (!fGPOSTable.isEmpty()&& !fGPOSTable->coversScript(fGPOSTable, fScriptTag, success)) {
fGPOSTable.clear(); // already loaded
}
}
OpenTypeLayoutEngine::OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable, LEErrorCode &success)
: LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fFeatureMask(minimalFeatures),
fFeatureMap(featureMap), fFeatureMapCount(featureMapCount), fFeatureOrder(FALSE),
fGSUBTable(gsubTable), fGDEFTable(NULL), fGPOSTable(NULL), fSubstitutionFilter(NULL)
{
static const le_uint32 gdefTableTag = LE_GDEF_TABLE_TAG;
static const le_uint32 gposTableTag = LE_GPOS_TABLE_TAG;
const GlyphPositioningTableHeader *gposTable = (const GlyphPositioningTableHeader *) getFontTable(gposTableTag);
switch (typoFlags & (LE_SS01_FEATURE_FLAG
| LE_SS02_FEATURE_FLAG
| LE_SS03_FEATURE_FLAG
| LE_SS04_FEATURE_FLAG
| LE_SS05_FEATURE_FLAG
| LE_SS06_FEATURE_FLAG
| LE_SS07_FEATURE_FLAG)) {
case LE_SS01_FEATURE_FLAG:
fFeatureMask |= ss01FeatureMask;
break;
case LE_SS02_FEATURE_FLAG:
fFeatureMask |= ss02FeatureMask;
break;
case LE_SS03_FEATURE_FLAG:
fFeatureMask |= ss03FeatureMask;
break;
case LE_SS04_FEATURE_FLAG:
fFeatureMask |= ss04FeatureMask;
break;
case LE_SS05_FEATURE_FLAG:
fFeatureMask |= ss05FeatureMask;
break;
case LE_SS06_FEATURE_FLAG:
fFeatureMask |= ss06FeatureMask;
break;
case LE_SS07_FEATURE_FLAG:
fFeatureMask |= ss07FeatureMask;
break;
}
if (typoFlags & LE_Kerning_FEATURE_FLAG) {
fFeatureMask |= (kernFeatureMask | paltFeatureMask);
// Convenience.
}
if (typoFlags & LE_Ligatures_FEATURE_FLAG) {
fFeatureMask |= (ligaFeatureMask | cligFeatureMask);
// Convenience TODO: should add: .. dligFeatureMask | rligFeatureMask ?
}
if (typoFlags & LE_CLIG_FEATURE_FLAG) fFeatureMask |= cligFeatureMask;
if (typoFlags & LE_DLIG_FEATURE_FLAG) fFeatureMask |= dligFeatureMask;
if (typoFlags & LE_HLIG_FEATURE_FLAG) fFeatureMask |= hligFeatureMask;
if (typoFlags & LE_LIGA_FEATURE_FLAG) fFeatureMask |= ligaFeatureMask;
if (typoFlags & LE_RLIG_FEATURE_FLAG) fFeatureMask |= rligFeatureMask;
if (typoFlags & LE_SMCP_FEATURE_FLAG) fFeatureMask |= smcpFeatureMask;
if (typoFlags & LE_FRAC_FEATURE_FLAG) fFeatureMask |= fracFeatureMask;
if (typoFlags & LE_AFRC_FEATURE_FLAG) fFeatureMask |= afrcFeatureMask;
if (typoFlags & LE_ZERO_FEATURE_FLAG) fFeatureMask |= zeroFeatureMask;
if (typoFlags & LE_SWSH_FEATURE_FLAG) fFeatureMask |= swshFeatureMask;
if (typoFlags & LE_CSWH_FEATURE_FLAG) fFeatureMask |= cswhFeatureMask;
if (typoFlags & LE_SALT_FEATURE_FLAG) fFeatureMask |= saltFeatureMask;
if (typoFlags & LE_RUBY_FEATURE_FLAG) fFeatureMask |= rubyFeatureMask;
if (typoFlags & LE_NALT_FEATURE_FLAG) {
// Mutually exclusive with ALL other features. http://www.microsoft.com/typography/otspec/features_ko.htm
fFeatureMask = naltFeatureMask;
}
if (typoFlags & LE_CHAR_FILTER_FEATURE_FLAG) {
// This isn't a font feature, but requests a Char Substitution Filter
fSubstitutionFilter = new CharSubstitutionFilter(fontInstance);
}
setScriptAndLanguageTags();
fGDEFTable = (const GlyphDefinitionTableHeader *) getFontTable(gdefTableTag);
// JK patch, 2008-05-30 - see Sinhala bug report and LKLUG font
// if (gposTable != NULL && gposTable->coversScriptAndLanguage(fScriptTag, fLangSysTag)) {
if (gposTable != NULL && gposTable->coversScript(fScriptTag)) {
fGPOSTable = gposTable;
}
}
