/*
*
- * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2008 - All Rights Reserved
*
*/
#include "ArabicLayoutEngine.h"
#include "CanonShaping.h"
#include "HanLayoutEngine.h"
+#include "HangulLayoutEngine.h"
#include "IndicLayoutEngine.h"
+#include "KhmerLayoutEngine.h"
#include "ThaiLayoutEngine.h"
+#include "TibetanLayoutEngine.h"
#include "GXLayoutEngine.h"
#include "ScriptAndLanguageTags.h"
#include "CharSubstitutionFilter.h"
#include "OpenTypeUtilities.h"
#include "GlyphSubstitutionTables.h"
+#include "GlyphDefinitionTables.h"
#include "MorphTables.h"
#include "DefaultCharMapper.h"
+#include "KernTable.h"
+
U_NAMESPACE_BEGIN
-#define ARRAY_SIZE(array) (sizeof array / sizeof array[0])
+/* Leave this copyright notice here! It needs to go somewhere in this library. */
+static const char copyright[] = U_COPYRIGHT_STRING;
const LEUnicode32 DefaultCharMapper::controlChars[] = {
0x0009, 0x000A, 0x000D,
0x206A, 0x206B, 0x206C, 0x206D, 0x206E, 0x206F
};
-const le_int32 DefaultCharMapper::controlCharsCount = ARRAY_SIZE(controlChars);
-
-const LEUnicode32 DefaultCharMapper::mirroredChars[] = {
- 0x0028, 0x0029, // ascii paired punctuation
- 0x003c, 0x003e,
- 0x005b, 0x005d,
- 0x007b, 0x007d,
- 0x2045, 0x2046, // math symbols (not complete)
- 0x207d, 0x207e,
- 0x208d, 0x208e,
- 0x2264, 0x2265,
- 0x3008, 0x3009, // chinese paired punctuation
- 0x300a, 0x300b,
- 0x300c, 0x300d,
- 0x300e, 0x300f,
- 0x3010, 0x3011,
- 0x3014, 0x3015,
- 0x3016, 0x3017,
- 0x3018, 0x3019,
- 0x301a, 0x301b
-};
-
-const le_int32 DefaultCharMapper::mirroredCharsCount = ARRAY_SIZE(mirroredChars);
+const le_int32 DefaultCharMapper::controlCharsCount = LE_ARRAY_SIZE(controlChars);
LEUnicode32 DefaultCharMapper::mapChar(LEUnicode32 ch) const
{
}
if (fMirror) {
- le_int32 index = OpenTypeUtilities::search((le_uint32) ch, (le_uint32 *)mirroredChars, mirroredCharsCount);
+ le_int32 index = OpenTypeUtilities::search((le_uint32) ch, (le_uint32 *)DefaultCharMapper::mirroredChars, DefaultCharMapper::mirroredCharsCount);
if (mirroredChars[index] == ch) {
- le_int32 mirrorOffset = ((index & 1) == 0) ? 1 : -1;
-
- return mirroredChars[index + mirrorOffset];
+ return DefaultCharMapper::srahCderorrim[index];
}
}
// nothing to do
}
+class CanonMarkFilter : public UMemory, public LEGlyphFilter
+{
+private:
+ const GlyphClassDefinitionTable *classDefTable;
+
+ CanonMarkFilter(const CanonMarkFilter &other); // forbid copying of this class
+ CanonMarkFilter &operator=(const CanonMarkFilter &other); // forbid copying of this class
+
+public:
+ CanonMarkFilter(const GlyphDefinitionTableHeader *gdefTable);
+ virtual ~CanonMarkFilter();
+
+ virtual le_bool accept(LEGlyphID glyph) const;
+};
+
+CanonMarkFilter::CanonMarkFilter(const GlyphDefinitionTableHeader *gdefTable)
+{
+ classDefTable = gdefTable->getMarkAttachClassDefinitionTable();
+}
+
+CanonMarkFilter::~CanonMarkFilter()
+{
+ // nothing to do?
+}
+
+le_bool CanonMarkFilter::accept(LEGlyphID glyph) const
+{
+ le_int32 glyphClass = classDefTable->getGlyphClass(glyph);
+
+ return glyphClass != 0;
+}
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LayoutEngine)
-static const LETag emptyTag = 0x00000000;
+#define ccmpFeatureTag LE_CCMP_FEATURE_TAG
-static const LETag ccmpFeatureTag = LE_CCMP_FEATURE_TAG;
+#define ccmpFeatureMask 0x80000000UL
-static const LETag canonFeatures[] = {ccmpFeatureTag, emptyTag};
+#define canonFeatures (ccmpFeatureMask)
-LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode)
- : fGlyphStorage(NULL), fFontInstance(fontInstance), fScriptCode(scriptCode), fLanguageCode(languageCode)
+static const FeatureMap canonFeatureMap[] =
+{
+ {ccmpFeatureTag, ccmpFeatureMask}
+};
+
+static const le_int32 canonFeatureMapCount = LE_ARRAY_SIZE(canonFeatureMap);
+
+LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags)
+ : fGlyphStorage(NULL), fFontInstance(fontInstance), fScriptCode(scriptCode), fLanguageCode(languageCode),
+ fTypoFlags(typoFlags), fFilterZeroWidth(TRUE)
{
fGlyphStorage = new LEGlyphStorage();
}
le_int32 LayoutEngine::getGlyphCount() const
{
return fGlyphStorage->getGlyphCount();
-};
+}
void LayoutEngine::getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const
{
if (canonGSUBTable->coversScript(scriptTag)) {
CharSubstitutionFilter *substitutionFilter = new CharSubstitutionFilter(fFontInstance);
+ const LEUnicode *inChars = &chars[offset];
+ LEUnicode *reordered = NULL;
+ LEGlyphStorage fakeGlyphStorage;
+
+ fakeGlyphStorage.allocateGlyphArray(count, rightToLeft, success);
+
+ if (LE_FAILURE(success)) {
+ 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...
+ if (fScriptCode == hebrScriptCode) {
+ reordered = LE_NEW_ARRAY(LEUnicode, count);
+
+ if (reordered == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, reordered, fakeGlyphStorage);
+ inChars = reordered;
+ }
- glyphStorage.allocateGlyphArray(count, rightToLeft, success);
- glyphStorage.allocateAuxData(success);
+ fakeGlyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
return 0;
}
for (i = 0; i < count; i += 1, out += dir) {
- glyphStorage[out] = (LEGlyphID) chars[offset + i];
- glyphStorage.setAuxData(out, (void *) canonFeatures, success);
+ fakeGlyphStorage[out] = (LEGlyphID) inChars[i];
+ fakeGlyphStorage.setAuxData(out, canonFeatures, success);
}
- outCharCount = canonGSUBTable->process(glyphStorage, rightToLeft, scriptTag, langSysTag, NULL, substitutionFilter, NULL);
+ if (reordered != NULL) {
+ LE_DELETE_ARRAY(reordered);
+ }
- out = (rightToLeft? count - 1 : 0);
+ outCharCount = canonGSUBTable->process(fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE);
+
+ out = (rightToLeft? outCharCount - 1 : 0);
+
+ /*
+ * The char indices array in fakeGlyphStorage has the correct mapping
+ * back to the original input characters. Save it in glyphStorage. The
+ * subsequent call to glyphStoratge.allocateGlyphArray will keep this
+ * array rather than allocating and initializing a new one.
+ */
+ glyphStorage.adoptCharIndicesArray(fakeGlyphStorage);
outChars = LE_NEW_ARRAY(LEUnicode, outCharCount);
for (i = 0; i < outCharCount; i += 1, out += dir) {
- outChars[out] = (LEUnicode) LE_GET_GLYPH(glyphStorage[i]);
+ outChars[out] = (LEUnicode) LE_GET_GLYPH(fakeGlyphStorage[i]);
}
delete substitutionFilter;
glyphStorage.setPosition(glyphCount, x, y, success);
}
-void LayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool /*reverse*/,
- LEGlyphStorage &/*glyphStorage*/, LEErrorCode &success)
+void LayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
return;
return;
}
+ GlyphDefinitionTableHeader *gdefTable = (GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable;
+ CanonMarkFilter filter(gdefTable);
+
+ adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
+
+ if (fTypoFlags & 0x1) { /* kerning enabled */
+ static const le_uint32 kernTableTag = LE_KERN_TABLE_TAG;
+
+ KernTable kt(fFontInstance, getFontTable(kernTableTag));
+ kt.process(glyphStorage);
+ }
+
// default is no adjustments
return;
}
DefaultCharMapper charMapper(TRUE, mirror);
- fFontInstance->mapCharsToGlyphs(chars, offset, count, reverse, &charMapper, glyphStorage);
+ fFontInstance->mapCharsToGlyphs(chars, offset, count, reverse, &charMapper, fFilterZeroWidth, glyphStorage);
}
// Input: characters, font?
}
le_int32 glyphCount;
+
+ if (fGlyphStorage->getGlyphCount() > 0) {
+ fGlyphStorage->reset();
+ }
glyphCount = computeGlyphs(chars, offset, count, max, rightToLeft, *fGlyphStorage, success);
positionGlyphs(*fGlyphStorage, x, y, success);
}
LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, LEErrorCode &success)
+{
+ // 3 -> kerning and ligatures
+ return LayoutEngine::layoutEngineFactory(fontInstance, scriptCode, languageCode, 3, success);
+}
+
+LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
{
static const le_uint32 gsubTableTag = LE_GSUB_TABLE_TAG;
static const le_uint32 mortTableTag = LE_MORT_TABLE_TAG;
case guruScriptCode:
case tamlScriptCode:
case teluScriptCode:
- result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ case sinhScriptCode:
+ result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
break;
case arabScriptCode:
- result = new ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
+ break;
+
+ case hangScriptCode:
+ result = new HangulOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
break;
case haniScriptCode:
case zhtLanguageCode:
case zhsLanguageCode:
if (gsubTable->coversScriptAndLanguage(scriptTag, languageTag, TRUE)) {
- result = new HanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new HanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
break;
}
// note: falling through to default case.
default:
- result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
break;
}
break;
+ case tibtScriptCode:
+ result = new TibetanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
+ break;
+
+ case khmrScriptCode:
+ result = new KhmerOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
+ break;
+
default:
- result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable);
break;
}
} else {
case guruScriptCode:
case tamlScriptCode:
case teluScriptCode:
+ case sinhScriptCode:
{
- result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode);
+ result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
break;
}
case arabScriptCode:
//case hebrScriptCode:
- result = new UnicodeArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode);
+ result = new UnicodeArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
break;
//case hebrScriptCode:
- // return new HebrewOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode);
+ // return new HebrewOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
case thaiScriptCode:
- result = new ThaiLayoutEngine(fontInstance, scriptCode, languageCode);
+ result = new ThaiLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
+ break;
+
+ case hangScriptCode:
+ result = new HangulOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
break;
default:
- result = new LayoutEngine(fontInstance, scriptCode, languageCode);
+ result = new LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
break;
}
}
}
LayoutEngine::~LayoutEngine() {
- reset();
+ delete fGlyphStorage;
}
U_NAMESPACE_END
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