/*
*
- * (C) Copyright IBM Corp. 1998-2006 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2010 - All Rights Reserved
*
*/
#include "LELanguages.h"
#include "LayoutEngine.h"
+#include "CanonShaping.h"
#include "OpenTypeLayoutEngine.h"
#include "ScriptAndLanguageTags.h"
#include "CharSubstitutionFilter.h"
#include "GDEFMarkFilter.h"
+#include "KernTable.h"
+
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(OpenTypeLayoutEngine)
#define kernFeatureTag LE_KERN_FEATURE_TAG
#define markFeatureTag LE_MARK_FEATURE_TAG
#define mkmkFeatureTag LE_MKMK_FEATURE_TAG
+#define loclFeatureTag LE_LOCL_FEATURE_TAG
+#define caltFeatureTag LE_CALT_FEATURE_TAG
// 'dlig' not used at the moment
#define dligFeatureTag 0x646C6967
#define paltFeatureMask 0x08000000UL
#define markFeatureMask 0x04000000UL
#define mkmkFeatureMask 0x02000000UL
+#define loclFeatureMask 0x01000000UL
+#define caltFeatureMask 0x00800000UL
-#define minimalFeatures (ccmpFeatureMask | markFeatureMask | mkmkFeatureMask)
+#define minimalFeatures (ccmpFeatureMask | markFeatureMask | mkmkFeatureMask | loclFeatureMask | caltFeatureMask)
#define ligaFeatures (ligaFeatureMask | cligFeatureMask | minimalFeatures)
#define kernFeatures (kernFeatureMask | paltFeatureMask | minimalFeatures)
#define kernAndLigaFeatures (ligaFeatures | kernFeatures)
{ccmpFeatureTag, ccmpFeatureMask},
{ligaFeatureTag, ligaFeatureMask},
{cligFeatureTag, cligFeatureMask},
- {kernFeatureTag, kernFeatureMask},
+ {kernFeatureTag, kernFeatureMask},
{paltFeatureTag, paltFeatureMask},
{markFeatureTag, markFeatureMask},
- {mkmkFeatureTag, mkmkFeatureMask}
+ {mkmkFeatureTag, mkmkFeatureMask},
+ {loclFeatureTag, loclFeatureMask},
+ {caltFeatureTag, caltFeatureMask}
};
static const le_int32 featureMapCount = LE_ARRAY_SIZE(featureMap);
OpenTypeLayoutEngine::OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
- le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable)
- : LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags), fFeatureMask(minimalFeatures),
+ 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), fFilterZeroWidth(TRUE)
+ 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;
fGDEFTable = (const GlyphDefinitionTableHeader *) getFontTable(gdefTableTag);
- if (gposTable != NULL && gposTable->coversScriptAndLanguage(fScriptTag, fLangSysTag)) {
+// 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)
- : LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags), fFeatureOrder(FALSE),
- fGSUBTable(NULL), fGDEFTable(NULL), fGPOSTable(NULL), fSubstitutionFilter(NULL), fFilterZeroWidth(TRUE)
+ le_int32 typoFlags, LEErrorCode &success)
+ : LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fFeatureOrder(FALSE),
+ fGSUBTable(NULL), fGDEFTable(NULL), fGPOSTable(NULL), fSubstitutionFilter(NULL)
{
setScriptAndLanguageTags();
}
if (scriptCode < 0 || scriptCode >= scriptCodeCount) {
return 0xFFFFFFFF;
}
-
return scriptTags[scriptCode];
}
+LETag OpenTypeLayoutEngine::getV2ScriptTag(le_int32 scriptCode)
+{
+ switch (scriptCode) {
+ case bengScriptCode : return bng2ScriptTag;
+ case devaScriptCode : return dev2ScriptTag;
+ case gujrScriptCode : return gjr2ScriptTag;
+ case guruScriptCode : return gur2ScriptTag;
+ case kndaScriptCode : return knd2ScriptTag;
+ case mlymScriptCode : return mlm2ScriptTag;
+ case oryaScriptCode : return ory2ScriptTag;
+ case tamlScriptCode : return tml2ScriptTag;
+ case teluScriptCode : return tel2ScriptTag;
+ default: return nullScriptTag;
+ }
+}
+
LETag OpenTypeLayoutEngine::getLangSysTag(le_int32 languageCode)
{
if (languageCode < 0 || languageCode >= languageCodeCount) {
void OpenTypeLayoutEngine::setScriptAndLanguageTags()
{
fScriptTag = getScriptTag(fScriptCode);
+ fScriptTagV2 = getV2ScriptTag(fScriptCode);
fLangSysTag = getLangSysTag(fLanguageCode);
}
return 0;
}
- le_int32 outCharCount = LayoutEngine::characterProcessing(chars, offset, count, max, rightToLeft, outChars, glyphStorage, success);
+ // This is the cheapest way to get mark reordering only for Hebrew.
+ // We could just do the mark reordering for all scripts, but most
+ // of them probably don't need it... Another option would be to
+ // add a HebrewOpenTypeLayoutEngine subclass, but the only thing it
+ // would need to do is mark reordering, so that seems like overkill.
+ if (fScriptCode == hebrScriptCode) {
+ outChars = LE_NEW_ARRAY(LEUnicode, count);
+
+ if (outChars == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ if (LE_FAILURE(success)) {
+ LE_DELETE_ARRAY(outChars);
+ return 0;
+ }
+
+ CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, outChars, glyphStorage);
+ }
if (LE_FAILURE(success)) {
return 0;
}
- glyphStorage.allocateGlyphArray(outCharCount, rightToLeft, success);
+ glyphStorage.allocateGlyphArray(count, rightToLeft, success);
glyphStorage.allocateAuxData(success);
- for (le_int32 i = 0; i < outCharCount; i += 1) {
+ for (le_int32 i = 0; i < count; i += 1) {
glyphStorage.setAuxData(i, fFeatureMask, success);
}
- return outCharCount;
+ return count;
}
// Input: characters, tags
return 0;
}
- mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, fFilterZeroWidth, glyphStorage, success);
+ mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphStorage, success);
if (LE_FAILURE(success)) {
return 0;
}
-
+
if (fGSUBTable != NULL) {
+ if (fScriptTagV2 != nullScriptTag && fGSUBTable->coversScriptAndLanguage(fScriptTagV2,fLangSysTag)) {
+ count = fGSUBTable->process(glyphStorage, rightToLeft, fScriptTagV2, fLangSysTag, fGDEFTable, fSubstitutionFilter,
+ fFeatureMap, fFeatureMapCount, fFeatureOrder, success);
+
+ } else {
count = fGSUBTable->process(glyphStorage, rightToLeft, fScriptTag, fLangSysTag, fGDEFTable, fSubstitutionFilter,
- fFeatureMap, fFeatureMapCount, fFeatureOrder);
+ fFeatureMap, fFeatureMapCount, fFeatureOrder, success);
+ }
}
return count;
}
+// Input: characters, tags
+// Output: glyphs, char indices
+le_int32 OpenTypeLayoutEngine::glyphSubstitution(le_int32 count, le_int32 max, le_bool rightToLeft,
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return 0;
+ }
+ if ( count < 0 || max < 0 ) {
+ success = LE_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ if (fGSUBTable != NULL) {
+ if (fScriptTagV2 != nullScriptTag && fGSUBTable->coversScriptAndLanguage(fScriptTagV2,fLangSysTag)) {
+ count = fGSUBTable->process(glyphStorage, rightToLeft, fScriptTagV2, fLangSysTag, fGDEFTable, fSubstitutionFilter,
+ fFeatureMap, fFeatureMapCount, fFeatureOrder, success);
+
+ } else {
+ count = fGSUBTable->process(glyphStorage, rightToLeft, fScriptTag, fLangSysTag, fGDEFTable, fSubstitutionFilter,
+ fFeatureMap, fFeatureMapCount, fFeatureOrder, success);
+ }
+ }
+
+ return count;
+}
le_int32 OpenTypeLayoutEngine::glyphPostProcessing(LEGlyphStorage &tempGlyphStorage, LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
}
le_int32 glyphCount = glyphStorage.getGlyphCount();
+ if (glyphCount == 0) {
+ return;
+ }
- if (glyphCount > 0 && fGPOSTable != NULL) {
+ if (fGPOSTable != NULL) {
GlyphPositionAdjustments *adjustments = new GlyphPositionAdjustments(glyphCount);
le_int32 i;
}
#endif
- fGPOSTable->process(glyphStorage, adjustments, reverse, fScriptTag, fLangSysTag, fGDEFTable, fFontInstance,
- fFeatureMap, fFeatureMapCount, fFeatureOrder);
+ if (fGPOSTable != NULL) {
+ if (fScriptTagV2 != nullScriptTag && fGPOSTable->coversScriptAndLanguage(fScriptTagV2,fLangSysTag)) {
+ fGPOSTable->process(glyphStorage, adjustments, reverse, fScriptTagV2, fLangSysTag, fGDEFTable, success, fFontInstance,
+ fFeatureMap, fFeatureMapCount, fFeatureOrder);
+
+ } else {
+ fGPOSTable->process(glyphStorage, adjustments, reverse, fScriptTag, fLangSysTag, fGDEFTable, success, fFontInstance,
+ fFeatureMap, fFeatureMapCount, fFeatureOrder);
+ }
+ } else if ( fTypoFlags & 0x1 ) {
+ static const le_uint32 kernTableTag = LE_KERN_TABLE_TAG;
+ KernTable kt(fFontInstance, getFontTable(kernTableTag));
+ kt.process(glyphStorage);
+ }
float xAdjust = 0, yAdjust = 0;
glyphStorage.adjustPosition(glyphCount, xAdjust, -yAdjust, success);
delete adjustments;
+ } else {
+ // if there was no GPOS table, maybe there's non-OpenType kerning we can use
+ LayoutEngine::adjustGlyphPositions(chars, offset, count, reverse, glyphStorage, success);
+ }
+
+ LEGlyphID zwnj = fFontInstance->mapCharToGlyph(0x200C);
+
+ if (zwnj != 0x0000) {
+ for (le_int32 g = 0; g < glyphCount; g += 1) {
+ LEGlyphID glyph = glyphStorage[g];
+
+ if (glyph == zwnj) {
+ glyphStorage[g] = LE_SET_GLYPH(glyph, 0xFFFF);
+ }
+ }
}
#if 0
projects / apple / icu.git / blobdiff