示例#1
0
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;
}
示例#4
0
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);
}
示例#5
0
void FontTableCache::dispose()
{
    for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
        LE_DELETE_ARRAY(fTableCache[i].table);
    }

    fTableCacheCurr = 0;
}
示例#6
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;
}
示例#9
0
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;
}
示例#10
0
// 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;
}
示例#12
0
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();
}
示例#13
0
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
}
示例#15
0
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;
}
示例#17
0
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;
}
示例#18
0
void FontTableCache::freeFontTable(const void *table) const
{
  LE_DELETE_ARRAY(table);
}
示例#19
0
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
}
示例#21
0
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
}