+++ /dev/null
-
-/*
- *
- * (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved
- *
- */
-
-#include "LETypes.h"
-#include "LEScripts.h"
-#include "LELanguages.h"
-
-#include "LayoutEngine.h"
-#include "CanonShaping.h"
-#include "OpenTypeLayoutEngine.h"
-#include "ScriptAndLanguageTags.h"
-#include "CharSubstitutionFilter.h"
-
-#include "GlyphSubstitutionTables.h"
-#include "GlyphDefinitionTables.h"
-#include "GlyphPositioningTables.h"
-
-#include "LEGlyphStorage.h"
-#include "GlyphPositionAdjustments.h"
-
-#include "GDEFMarkFilter.h"
-
-#include "KernTable.h"
-
-U_NAMESPACE_BEGIN
-
-UOBJECT_DEFINE_RTTI_IMPLEMENTATION(OpenTypeLayoutEngine)
-
-#define ccmpFeatureTag LE_CCMP_FEATURE_TAG
-#define ligaFeatureTag LE_LIGA_FEATURE_TAG
-#define cligFeatureTag LE_CLIG_FEATURE_TAG
-#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
-
-#define dligFeatureTag LE_DLIG_FEATURE_TAG
-#define rligFeatureTag LE_RLIG_FEATURE_TAG
-#define paltFeatureTag LE_PALT_FEATURE_TAG
-
-#define hligFeatureTag LE_HLIG_FEATURE_TAG
-#define smcpFeatureTag LE_SMCP_FEATURE_TAG
-#define fracFeatureTag LE_FRAC_FEATURE_TAG
-#define afrcFeatureTag LE_AFRC_FEATURE_TAG
-#define zeroFeatureTag LE_ZERO_FEATURE_TAG
-#define swshFeatureTag LE_SWSH_FEATURE_TAG
-#define cswhFeatureTag LE_CSWH_FEATURE_TAG
-#define saltFeatureTag LE_SALT_FEATURE_TAG
-#define naltFeatureTag LE_NALT_FEATURE_TAG
-#define rubyFeatureTag LE_RUBY_FEATURE_TAG
-#define ss01FeatureTag LE_SS01_FEATURE_TAG
-#define ss02FeatureTag LE_SS02_FEATURE_TAG
-#define ss03FeatureTag LE_SS03_FEATURE_TAG
-#define ss04FeatureTag LE_SS04_FEATURE_TAG
-#define ss05FeatureTag LE_SS05_FEATURE_TAG
-#define ss06FeatureTag LE_SS06_FEATURE_TAG
-#define ss07FeatureTag LE_SS07_FEATURE_TAG
-
-#define ccmpFeatureMask 0x80000000UL
-#define ligaFeatureMask 0x40000000UL
-#define cligFeatureMask 0x20000000UL
-#define kernFeatureMask 0x10000000UL
-#define paltFeatureMask 0x08000000UL
-#define markFeatureMask 0x04000000UL
-#define mkmkFeatureMask 0x02000000UL
-#define loclFeatureMask 0x01000000UL
-#define caltFeatureMask 0x00800000UL
-
-#define dligFeatureMask 0x00400000UL
-#define rligFeatureMask 0x00200000UL
-#define hligFeatureMask 0x00100000UL
-#define smcpFeatureMask 0x00080000UL
-#define fracFeatureMask 0x00040000UL
-#define afrcFeatureMask 0x00020000UL
-#define zeroFeatureMask 0x00010000UL
-#define swshFeatureMask 0x00008000UL
-#define cswhFeatureMask 0x00004000UL
-#define saltFeatureMask 0x00002000UL
-#define naltFeatureMask 0x00001000UL
-#define rubyFeatureMask 0x00000800UL
-#define ss01FeatureMask 0x00000400UL
-#define ss02FeatureMask 0x00000200UL
-#define ss03FeatureMask 0x00000100UL
-#define ss04FeatureMask 0x00000080UL
-#define ss05FeatureMask 0x00000040UL
-#define ss06FeatureMask 0x00000020UL
-#define ss07FeatureMask 0x00000010UL
-
-#define minimalFeatures (ccmpFeatureMask | markFeatureMask | mkmkFeatureMask | loclFeatureMask | caltFeatureMask)
-
-static const FeatureMap featureMap[] =
-{
- {ccmpFeatureTag, ccmpFeatureMask},
- {ligaFeatureTag, ligaFeatureMask},
- {cligFeatureTag, cligFeatureMask},
- {kernFeatureTag, kernFeatureMask},
- {paltFeatureTag, paltFeatureMask},
- {markFeatureTag, markFeatureMask},
- {mkmkFeatureTag, mkmkFeatureMask},
- {loclFeatureTag, loclFeatureMask},
- {caltFeatureTag, caltFeatureMask},
- {hligFeatureTag, hligFeatureMask},
- {smcpFeatureTag, smcpFeatureMask},
- {fracFeatureTag, fracFeatureMask},
- {afrcFeatureTag, afrcFeatureMask},
- {zeroFeatureTag, zeroFeatureMask},
- {swshFeatureTag, swshFeatureMask},
- {cswhFeatureTag, cswhFeatureMask},
- {saltFeatureTag, saltFeatureMask},
- {naltFeatureTag, naltFeatureMask},
- {rubyFeatureTag, rubyFeatureMask},
- {ss01FeatureTag, ss01FeatureMask},
- {ss02FeatureTag, ss02FeatureMask},
- {ss03FeatureTag, ss03FeatureMask},
- {ss04FeatureTag, ss04FeatureMask},
- {ss05FeatureTag, ss05FeatureMask},
- {ss06FeatureTag, ss06FeatureMask},
- {ss07FeatureTag, ss07FeatureMask}
-};
-
-static const le_int32 featureMapCount = LE_ARRAY_SIZE(featureMap);
-
-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
- }
-}
-
-void OpenTypeLayoutEngine::applyTypoFlags() {
- const le_int32& typoFlags = fTypoFlags;
- const LEFontInstance *fontInstance = fFontInstance;
-
- 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);
- }
-
-}
-
-void OpenTypeLayoutEngine::reset()
-{
- // NOTE: if we're called from
- // the destructor, LayoutEngine;:reset()
- // will have been called already by
- // LayoutEngine::~LayoutEngine()
- LayoutEngine::reset();
-}
-
-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(), fGDEFTable(), fGPOSTable(), fSubstitutionFilter(NULL)
-{
- applyTypoFlags();
- setScriptAndLanguageTags();
-}
-
-OpenTypeLayoutEngine::~OpenTypeLayoutEngine()
-{
- if (fTypoFlags & LE_CHAR_FILTER_FEATURE_FLAG) {
- delete fSubstitutionFilter;
- fSubstitutionFilter = NULL;
- }
-
- reset();
-}
-
-LETag OpenTypeLayoutEngine::getScriptTag(le_int32 scriptCode)
-{
- 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) {
- return 0xFFFFFFFF;
- }
-
- return languageTags[languageCode];
-}
-
-void OpenTypeLayoutEngine::setScriptAndLanguageTags()
-{
- fScriptTag = getScriptTag(fScriptCode);
- fScriptTagV2 = getV2ScriptTag(fScriptCode);
- fLangSysTag = getLangSysTag(fLanguageCode);
-}
-
-le_int32 OpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
- LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- if (offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- // 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(count, rightToLeft, success);
- glyphStorage.allocateAuxData(success);
-
- for (le_int32 i = 0; i < count; i += 1) {
- glyphStorage.setAuxData(i, fFeatureMask, success);
- }
-
- return count;
-}
-
-// Input: characters, tags
-// Output: glyphs, char indices
-le_int32 OpenTypeLayoutEngine::glyphProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
- LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphStorage, success);
-
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- if (fGSUBTable.isValid()) {
- if (fScriptTagV2 != nullScriptTag && fGSUBTable->coversScriptAndLanguage(fGSUBTable, fScriptTagV2, fLangSysTag, success)) {
- count = fGSUBTable->process(fGSUBTable, glyphStorage, rightToLeft, fScriptTagV2, fLangSysTag, fGDEFTable, fSubstitutionFilter,
- fFeatureMap, fFeatureMapCount, fFeatureOrder, success);
-
- } else {
- count = fGSUBTable->process(fGSUBTable, glyphStorage, rightToLeft, fScriptTag, fLangSysTag, fGDEFTable, fSubstitutionFilter,
- 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.isValid()) {
- if (fScriptTagV2 != nullScriptTag && fGSUBTable->coversScriptAndLanguage(fGSUBTable,fScriptTagV2,fLangSysTag,success)) {
- count = fGSUBTable->process(fGSUBTable, glyphStorage, rightToLeft, fScriptTagV2, fLangSysTag, fGDEFTable, fSubstitutionFilter,
- fFeatureMap, fFeatureMapCount, fFeatureOrder, success);
-
- } else {
- count = fGSUBTable->process(fGSUBTable, 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)) {
- return 0;
- }
-
- glyphStorage.adoptGlyphArray(tempGlyphStorage);
- glyphStorage.adoptCharIndicesArray(tempGlyphStorage);
- glyphStorage.adoptAuxDataArray(tempGlyphStorage);
- glyphStorage.adoptGlyphCount(tempGlyphStorage);
-
- return glyphStorage.getGlyphCount();
-}
-
-le_int32 OpenTypeLayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- LEUnicode *outChars = NULL;
- LEGlyphStorage fakeGlyphStorage;
- le_int32 outCharCount, outGlyphCount;
-
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- outCharCount = characterProcessing(chars, offset, count, max, rightToLeft, outChars, fakeGlyphStorage, success);
-
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- if (outChars != NULL) {
- // le_int32 fakeGlyphCount =
- glyphProcessing(outChars, 0, outCharCount, outCharCount, rightToLeft, fakeGlyphStorage, success);
- LE_DELETE_ARRAY(outChars); // FIXME: a subclass may have allocated this, in which case this delete might not work...
- //adjustGlyphs(outChars, 0, outCharCount, rightToLeft, fakeGlyphs, fakeGlyphCount);
- } else {
- // le_int32 fakeGlyphCount =
- glyphProcessing(chars, offset, count, max, rightToLeft, fakeGlyphStorage, success);
- //adjustGlyphs(chars, offset, count, rightToLeft, fakeGlyphs, fakeGlyphCount);
- }
-
- if (LE_FAILURE(success)) {
- return 0;
- }
-
- outGlyphCount = glyphPostProcessing(fakeGlyphStorage, glyphStorage, success);
-
- return outGlyphCount;
-}
-
-// apply GPOS table, if any
-void OpenTypeLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
- LEGlyphStorage &glyphStorage, LEErrorCode &success)
-{
- if (LE_FAILURE(success)) {
- return;
- }
-
- if (chars == NULL || offset < 0 || count < 0) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- le_int32 glyphCount = glyphStorage.getGlyphCount();
- if (glyphCount == 0) {
- return;
- }
-
- if (!fGPOSTable.isEmpty()) {
- GlyphPositionAdjustments *adjustments = new GlyphPositionAdjustments(glyphCount);
- le_int32 i;
-
- if (adjustments == NULL) {
- success = LE_MEMORY_ALLOCATION_ERROR;
- return;
- }
-
-#if 0
- // Don't need to do this if we allocate
- // the adjustments array w/ new...
- for (i = 0; i < glyphCount; i += 1) {
- adjustments->setXPlacement(i, 0);
- adjustments->setYPlacement(i, 0);
-
- adjustments->setXAdvance(i, 0);
- adjustments->setYAdvance(i, 0);
-
- adjustments->setBaseOffset(i, -1);
- }
-#endif
-
- if (!fGPOSTable.isEmpty()) {
- if (fScriptTagV2 != nullScriptTag &&
- fGPOSTable->coversScriptAndLanguage(fGPOSTable, fScriptTagV2,fLangSysTag,success)) {
- fGPOSTable->process(fGPOSTable, glyphStorage, adjustments, reverse, fScriptTagV2, fLangSysTag,
- fGDEFTable, success, fFontInstance, fFeatureMap, fFeatureMapCount, fFeatureOrder);
-
- } else {
- fGPOSTable->process(fGPOSTable, glyphStorage, adjustments, reverse, fScriptTag, fLangSysTag,
- fGDEFTable, success, fFontInstance, fFeatureMap, fFeatureMapCount, fFeatureOrder);
- }
- } else if (fTypoFlags & LE_Kerning_FEATURE_FLAG) { /* kerning enabled */
- LETableReference kernTable(fFontInstance, LE_KERN_TABLE_TAG, success);
- KernTable kt(kernTable, success);
- kt.process(glyphStorage, success);
- }
-
- float xAdjust = 0, yAdjust = 0;
-
- for (i = 0; i < glyphCount; i += 1) {
- float xAdvance = adjustments->getXAdvance(i);
- float yAdvance = adjustments->getYAdvance(i);
- float xPlacement = 0;
- float yPlacement = 0;
-
-
-#if 0
- // This is where separate kerning adjustments
- // should get applied.
- xAdjust += xKerning;
- yAdjust += yKerning;
-#endif
-
- for (le_int32 base = i; base >= 0; base = adjustments->getBaseOffset(base)) {
- xPlacement += adjustments->getXPlacement(base);
- yPlacement += adjustments->getYPlacement(base);
- }
-
- xPlacement = fFontInstance->xUnitsToPoints(xPlacement);
- yPlacement = fFontInstance->yUnitsToPoints(yPlacement);
- glyphStorage.adjustPosition(i, xAdjust + xPlacement, -(yAdjust + yPlacement), success);
-
- xAdjust += fFontInstance->xUnitsToPoints(xAdvance);
- yAdjust += fFontInstance->yUnitsToPoints(yAdvance);
- }
-
- 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
- // Don't know why this is here...
- LE_DELETE_ARRAY(fFeatureTags);
- fFeatureTags = NULL;
-#endif
-}
-
-U_NAMESPACE_END
projects / apple / icu.git / blobdiff