Paragraph *Paragraph::paragraphFactory(const char *fileName, const LEFontInstance *font, GUISupport *guiSupport)
{
LEErrorCode status = LE_NO_ERROR;
le_int32 charCount;
const UChar *text = UnicodeReader::readFile(fileName, guiSupport, charCount);
Paragraph *result = NULL;
if (text == NULL) {
return NULL;
}
FontRuns fontRuns(0);
fontRuns.add(font, charCount);
result = new Paragraph(text, charCount, &fontRuns, status);
if (LE_FAILURE(status)) {
delete result;
result = NULL;
}
LE_DELETE_ARRAY(text);
return result;
}
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, fakeGlyphCount;
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) {
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 {
fakeGlyphCount = glyphProcessing(chars, offset, count, max, rightToLeft, fakeGlyphStorage, success);
//adjustGlyphs(chars, offset, count, rightToLeft, fakeGlyphs, fakeGlyphCount);
}
outGlyphCount = glyphPostProcessing(fakeGlyphStorage, glyphStorage, success);
return outGlyphCount;
}
// Input: characters
// Output: characters, char indices, tags
// Returns: output character count
le_int32 IndicOpenTypeLayoutEngine::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 (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
le_int32 worstCase = count * IndicReordering::getWorstCaseExpansion(fScriptCode);
outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
if (outChars == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
glyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
return 0;
}
// NOTE: assumes this allocates featureTags...
// (probably better than doing the worst case stuff here...)
le_int32 outCharCount;
if (fVersion2) {
outCharCount = IndicReordering::v2process(&chars[offset], count, fScriptCode, outChars, glyphStorage);
} else {
outCharCount = IndicReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage, &fMPreFixups, success);
}
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
return 0;
}
glyphStorage.adoptGlyphCount(outCharCount);
return outCharCount;
}
void CanonShaping::reorderMarks(const LEUnicode *inChars, le_int32 charCount, le_bool rightToLeft,
LEUnicode *outChars, LEGlyphStorage &glyphStorage)
{
LEErrorCode success = LE_NO_ERROR;
LEReferenceTo<GlyphDefinitionTableHeader> gdefTable(LETableReference::kStaticData, CanonShaping::glyphDefinitionTable, CanonShaping::glyphDefinitionTableLen);
LEReferenceTo<ClassDefinitionTable> classTable = gdefTable->getMarkAttachClassDefinitionTable(gdefTable, success);
le_int32 *combiningClasses = LE_NEW_ARRAY(le_int32, charCount);
le_int32 *indices = LE_NEW_ARRAY(le_int32, charCount);
le_int32 i;
for (i = 0; i < charCount; i += 1) {
combiningClasses[i] = classTable->getGlyphClass(classTable, (LEGlyphID) inChars[i], success);
indices[i] = i;
}
for (i = 0; i < charCount; i += 1) {
if (combiningClasses[i] != 0) {
le_int32 mark;
for (mark = i; mark < charCount; mark += 1) {
if (combiningClasses[mark] == 0) {
break;
}
}
sortMarks(indices, combiningClasses, i, mark);
}
}
le_int32 out = 0, dir = 1;
if (rightToLeft) {
out = charCount - 1;
dir = -1;
}
for (i = 0; i < charCount; i += 1, out += dir) {
le_int32 index = indices[i];
outChars[i] = inChars[index];
glyphStorage.setCharIndex(out, index, success);
}
LE_DELETE_ARRAY(indices);
LE_DELETE_ARRAY(combiningClasses);
}
void FontTableCache::dispose()
{
for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
LE_DELETE_ARRAY(fTableCache[i].table);
}
fTableCacheCurr = 0;
}
void LEInsertionList::reset()
{
while (head != NULL) {
InsertionRecord *record = head;
head = head->next;
LE_DELETE_ARRAY(record);
}
tail = (InsertionRecord *) &head;
growAmount = 0;
}
// Input: characters (0..max provided for context)
// Output: glyphs, char indices
// Returns: the glyph count
// NOTE: this assumes that ThaiShaping::compose will allocate the outChars array...
le_int32 ThaiLayoutEngine::computeGlyphs(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;
}
LEUnicode *outChars;
le_int32 glyphCount;
// This is enough room for the worst-case expansion
// (it says here...)
outChars = LE_NEW_ARRAY(LEUnicode, count * 2);
if (outChars == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphStorage.allocateGlyphArray(count * 2, FALSE, success);
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphCount = ThaiShaping::compose(chars, offset, count, fGlyphSet, fErrorChar, outChars, glyphStorage);
mapCharsToGlyphs(outChars, 0, glyphCount, FALSE, FALSE, glyphStorage, success);
LE_DELETE_ARRAY(outChars);
glyphStorage.adoptGlyphCount(glyphCount);
return glyphCount;
}
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;
}
const void *XeTeXFontInst_FT2::readTable(LETag tag, le_uint32 *length) const
{
*length = 0;
FT_ULong tmpLength = 0;
FT_Error err = FT_Load_Sfnt_Table(face, tag, 0, NULL, &tmpLength);
if (err != 0)
return NULL;
void* table = LE_NEW_ARRAY(char, tmpLength);
if (table != NULL) {
err = FT_Load_Sfnt_Table(face, tag, 0, (FT_Byte*)table, &tmpLength);
if (err != 0) {
LE_DELETE_ARRAY(table);
return NULL;
}
*length = tmpLength;
}
return table;
}
// Input: characters
// Output: characters, char indices, tags
// Returns: output character count
le_int32 ArabicOpenTypeLayoutEngine::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 (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
outChars = LE_NEW_ARRAY(LEUnicode, count);
if (outChars == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphStorage.allocateGlyphArray(count, rightToLeft, success);
glyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
return 0;
}
CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, outChars, glyphStorage);
// Note: This processes the *original* character array so we can get context
// for the first and last characters. This is OK because only the marks
// will have been reordered, and they don't contribute to shaping.
ArabicShaping::shape(chars, offset, count, max, rightToLeft, glyphStorage);
return count;
}
// Input: characters
// Output: characters, char indices, tags
// Returns: output character count
le_int32 TibetanOpenTypeLayoutEngine::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 (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
le_int32 worstCase = count * 3; // worst case is 3 for Khmer TODO check if 2 is enough
outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
if (outChars == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
glyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
return 0;
}
// NOTE: assumes this allocates featureTags...
// (probably better than doing the worst case stuff here...)
le_int32 outCharCount = TibetanReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage);
glyphStorage.adoptGlyphCount(outCharCount);
return outCharCount;
}
le_int32 LayoutEngine::computeGlyphs(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;
}
LEUnicode *outChars = NULL;
le_int32 outCharCount = characterProcessing(chars, offset, count, max, rightToLeft, outChars, glyphStorage, success);
if (outChars != NULL) {
mapCharsToGlyphs(outChars, 0, outCharCount, rightToLeft, rightToLeft, TRUE, glyphStorage, success);
LE_DELETE_ARRAY(outChars); // FIXME: a subclass may have allocated this, in which case this delete might not work...
} else {
mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, TRUE, glyphStorage, success);
}
return glyphStorage.getGlyphCount();
}
MPreFixups::~MPreFixups()
{
LE_DELETE_ARRAY(fFixupData);
fFixupData = NULL;
}
// 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 && fGPOSTable != NULL) {
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
fGPOSTable->process(glyphStorage, adjustments, reverse, fScriptTag,
fLangSysTag, fGDEFTable, success, fFontInstance, fFeatureOrder);
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;
}
#if 0
// Don't know why this is here...
LE_DELETE_ARRAY(fFeatureTags);
fFeatureTags = NULL;
#endif
}
le_int32 LayoutEngine::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;
}
const GlyphSubstitutionTableHeader *canonGSUBTable = (GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable;
LETag scriptTag = OpenTypeLayoutEngine::getScriptTag(fScriptCode);
LETag langSysTag = OpenTypeLayoutEngine::getLangSysTag(fLanguageCode);
le_int32 i, dir = 1, out = 0, outCharCount = count;
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;
}
fakeGlyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
return 0;
}
if (rightToLeft) {
out = count - 1;
dir = -1;
}
for (i = 0; i < count; i += 1, out += dir) {
fakeGlyphStorage[out] = (LEGlyphID) inChars[i];
fakeGlyphStorage.setAuxData(out, canonFeatures, success);
}
if (reordered != NULL) {
LE_DELETE_ARRAY(reordered);
}
outCharCount = canonGSUBTable->process(fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE);
out = (rightToLeft? outCharCount - 1 : 0);
outChars = LE_NEW_ARRAY(LEUnicode, outCharCount);
for (i = 0; i < outCharCount; i += 1, out += dir) {
outChars[out] = (LEUnicode) LE_GET_GLYPH(fakeGlyphStorage[i]);
}
delete substitutionFilter;
}
return outCharCount;
}
le_int32 HangulOpenTypeLayoutEngine::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 (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
le_int32 worstCase = count * 3;
outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
if (outChars == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
glyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
LE_DELETE_ARRAY(outChars);
return 0;
}
le_int32 outCharCount = 0;
le_int32 limit = offset + count;
le_int32 i = offset;
while (i < limit) {
le_int32 state = 0;
le_int32 inStart = i;
le_int32 outStart = outCharCount;
while( i < limit) {
LEUnicode lead = 0;
LEUnicode vowel = 0;
LEUnicode trail = 0;
int32_t chClass = getCharClass(chars[i], lead, vowel, trail);
const StateTransition transition = stateTable[state][chClass];
if (chClass == CC_X) {
/* Any character of type X will be stored as a trail jamo */
if ((transition.actionFlags & AF_T) != 0) {
outChars[outCharCount] = trail;
glyphStorage.setCharIndex(outCharCount, i-offset, success);
glyphStorage.setAuxData(outCharCount++, nullFeatures, success);
}
} else {
/* Any Hangul will be fully decomposed. Output the decomposed characters. */
if ((transition.actionFlags & AF_L) != 0) {
outChars[outCharCount] = lead;
glyphStorage.setCharIndex(outCharCount, i-offset, success);
glyphStorage.setAuxData(outCharCount++, ljmoFeatures, success);
}
if ((transition.actionFlags & AF_V) != 0) {
outChars[outCharCount] = vowel;
glyphStorage.setCharIndex(outCharCount, i-offset, success);
glyphStorage.setAuxData(outCharCount++, vjmoFeatures, success);
}
if ((transition.actionFlags & AF_T) != 0) {
outChars[outCharCount] = trail;
glyphStorage.setCharIndex(outCharCount, i-offset, success);
glyphStorage.setAuxData(outCharCount++, tjmoFeatures, success);
}
}
state = transition.newState;
/* Negative next state means stop. */
if (state < 0) {
break;
}
i += 1;
}
le_int32 inLength = i - inStart;
le_int32 outLength = outCharCount - outStart;
/*
* See if the syllable can be composed into a single character. There are 5
* possible cases:
*
* Input Decomposed to Compose to
* LV L, V LV
* LVT L, V, T LVT
* L, V L, V LV, DEL
* LV, T L, V, T LVT, DEL
* L, V, T L, V, T LVT, DEL, DEL
*/
if ((inLength >= 1 && inLength <= 3) && (outLength == 2 || outLength == 3)) {
LEUnicode syllable = 0x0000;
LEUnicode lead = outChars[outStart];
LEUnicode vowel = outChars[outStart + 1];
LEUnicode trail = outLength == 3? outChars[outStart + 2] : TJMO_FIRST;
/*
* If the composition consumes the whole decomposed syllable,
* we can use it.
*/
if (compose(lead, vowel, trail, syllable) == outLength) {
outCharCount = outStart;
outChars[outCharCount] = syllable;
glyphStorage.setCharIndex(outCharCount, inStart-offset, success);
glyphStorage.setAuxData(outCharCount++, nullFeatures, success);
/*
* Replace the rest of the input characters with DEL.
*/
for(le_int32 d = inStart + 1; d < i; d += 1) {
outChars[outCharCount] = 0xFFFF;
glyphStorage.setCharIndex(outCharCount, d - offset, success);
glyphStorage.setAuxData(outCharCount++, nullFeatures, success);
}
}
}
}
glyphStorage.adoptGlyphCount(outCharCount);
return outCharCount;
}
le_int32 LayoutEngine::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;
}
LEReferenceTo<GlyphSubstitutionTableHeader> canonGSUBTable((GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable);
LETag scriptTag = OpenTypeLayoutEngine::getScriptTag(fScriptCode);
LETag langSysTag = OpenTypeLayoutEngine::getLangSysTag(fLanguageCode);
le_int32 i, dir = 1, out = 0, outCharCount = count;
if (canonGSUBTable->coversScript(canonGSUBTable,scriptTag, success) || LE_SUCCESS(success)) {
CharSubstitutionFilter *substitutionFilter = new CharSubstitutionFilter(fFontInstance);
if (substitutionFilter == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
const LEUnicode *inChars = &chars[offset];
LEUnicode *reordered = NULL;
LEGlyphStorage fakeGlyphStorage;
fakeGlyphStorage.allocateGlyphArray(count, rightToLeft, success);
if (LE_FAILURE(success)) {
delete substitutionFilter;
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) {
delete substitutionFilter;
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, reordered, fakeGlyphStorage);
inChars = reordered;
}
fakeGlyphStorage.allocateAuxData(success);
if (LE_FAILURE(success)) {
delete substitutionFilter;
return 0;
}
if (rightToLeft) {
out = count - 1;
dir = -1;
}
for (i = 0; i < count; i += 1, out += dir) {
fakeGlyphStorage[out] = (LEGlyphID) inChars[i];
fakeGlyphStorage.setAuxData(out, canonFeatures, success);
}
if (reordered != NULL) {
LE_DELETE_ARRAY(reordered);
}
outCharCount = canonGSUBTable->process(canonGSUBTable, fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, (const GlyphDefinitionTableHeader*)NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE, success);
if (LE_FAILURE(success)) {
delete substitutionFilter;
return 0;
}
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);
if (outChars == NULL) {
delete substitutionFilter;
success = LE_MEMORY_ALLOCATION_ERROR;
return 0;
}
for (i = 0; i < outCharCount; i += 1, out += dir) {
outChars[out] = (LEUnicode) LE_GET_GLYPH(fakeGlyphStorage[i]);
}
delete substitutionFilter;
}
return outCharCount;
}
void FontTableCache::freeFontTable(const void *table) const
{
LE_DELETE_ARRAY(table);
}
LookupProcessor::~LookupProcessor()
{
LE_DELETE_ARRAY(lookupOrderArray);
LE_DELETE_ARRAY(lookupSelectArray);
}
// 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 != NULL) {
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 != 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;
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
// Google Patch: disable this. Causes problems with Tamil.
// Umesh says layout is poor both with and without the change, but
// worse with the change. See ocean/imageprocessing/layout_test_unittest.cc
// Public ICU ticket for this problem is #7742
// 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
}
void MPreFixups::apply(LEGlyphStorage &glyphStorage, LEErrorCode& leSuccess)
{
if (LE_FAILURE(leSuccess)) {
return;
}
for (le_int32 fixup = 0; fixup < fFixupCount; fixup += 1) {
le_int32 baseIndex = fFixupData[fixup].fBaseIndex;
le_int32 mpreIndex = fFixupData[fixup].fMPreIndex;
le_int32 mpreLimit = mpreIndex + 1;
while (glyphStorage[baseIndex] == 0xFFFF || glyphStorage[baseIndex] == 0xFFFE) {
baseIndex -= 1;
}
while (glyphStorage[mpreLimit] == 0xFFFF || glyphStorage[mpreLimit] == 0xFFFE) {
mpreLimit += 1;
}
if (mpreLimit == baseIndex) {
continue;
}
LEErrorCode success = LE_NO_ERROR;
le_int32 mpreCount = mpreLimit - mpreIndex;
le_int32 moveCount = baseIndex - mpreLimit;
le_int32 mpreDest = baseIndex - mpreCount;
LEGlyphID *mpreSave = LE_NEW_ARRAY(LEGlyphID, mpreCount);
le_int32 *indexSave = LE_NEW_ARRAY(le_int32, mpreCount);
if (mpreSave == NULL || indexSave == NULL) {
LE_DELETE_ARRAY(mpreSave);
LE_DELETE_ARRAY(indexSave);
success = LE_MEMORY_ALLOCATION_ERROR;
return;
}
le_int32 i;
for (i = 0; i < mpreCount; i += 1) {
mpreSave[i] = glyphStorage[mpreIndex + i];
indexSave[i] = glyphStorage.getCharIndex(mpreIndex + i, success); //charIndices[mpreIndex + i];
}
for (i = 0; i < moveCount; i += 1) {
LEGlyphID glyph = glyphStorage[mpreLimit + i];
le_int32 charIndex = glyphStorage.getCharIndex(mpreLimit + i, success);
glyphStorage[mpreIndex + i] = glyph;
glyphStorage.setCharIndex(mpreIndex + i, charIndex, success);
}
for (i = 0; i < mpreCount; i += 1) {
glyphStorage[mpreDest + i] = mpreSave[i];
glyphStorage.setCharIndex(mpreDest, indexSave[i], success);
}
LE_DELETE_ARRAY(indexSave);
LE_DELETE_ARRAY(mpreSave);
}
}
// 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
}