| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| |
| /* |
| * |
| * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "LEScripts.h" |
| #include "LEGlyphFilter.h" |
| #include "LEGlyphStorage.h" |
| #include "LayoutEngine.h" |
| #include "OpenTypeLayoutEngine.h" |
| #include "ArabicLayoutEngine.h" |
| #include "ScriptAndLanguageTags.h" |
| #include "CharSubstitutionFilter.h" |
| |
| #include "GlyphSubstitutionTables.h" |
| #include "GlyphDefinitionTables.h" |
| #include "GlyphPositioningTables.h" |
| |
| #include "GDEFMarkFilter.h" |
| |
| #include "ArabicShaping.h" |
| #include "CanonShaping.h" |
| |
| le_bool CharSubstitutionFilter::accept(LEGlyphID glyph) const |
| { |
| return fFontInstance->canDisplay((LEUnicode) glyph); |
| } |
| |
| ArabicOpenTypeLayoutEngine::ArabicOpenTypeLayoutEngine( |
| const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, |
| le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable) |
| : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable) |
| { |
| fFeatureMap = ArabicShaping::getFeatureMap(fFeatureMapCount); |
| fFeatureOrder = TRUE; |
| } |
| |
| ArabicOpenTypeLayoutEngine::ArabicOpenTypeLayoutEngine( |
| const LEFontInstance *fontInstance, |
| le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags) |
| : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags) |
| { |
| fFeatureMap = ArabicShaping::getFeatureMap(fFeatureMapCount); |
| |
| // NOTE: We don't need to set fFeatureOrder to TRUE here |
| // because this constructor is only called by the constructor |
| // for UnicodeArabicOpenTypeLayoutEngine, which uses a pre-built |
| // GSUB table that has the features in the correct order. |
| |
| //fFeatureOrder = TRUE; |
| } |
| |
| ArabicOpenTypeLayoutEngine::~ArabicOpenTypeLayoutEngine() |
| { |
| // nothing to do |
| } |
| |
| // 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; |
| } |
| |
| void ArabicOpenTypeLayoutEngine::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; |
| } |
| |
| if (fGPOSTable != NULL) { |
| OpenTypeLayoutEngine::adjustGlyphPositions(chars, offset, count, |
| reverse, glyphStorage, success); |
| } else if (fGDEFTable != NULL) { |
| GDEFMarkFilter filter(fGDEFTable); |
| |
| adjustMarkGlyphs(glyphStorage, &filter, success); |
| } else { |
| GlyphDefinitionTableHeader *gdefTable = |
| (GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable; |
| GDEFMarkFilter filter(gdefTable); |
| |
| adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success); |
| } |
| } |
| |
| UnicodeArabicOpenTypeLayoutEngine::UnicodeArabicOpenTypeLayoutEngine( |
| const LEFontInstance *fontInstance, |
| le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags) |
| : ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags) |
| { |
| fGSUBTable = (const GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable; |
| fGDEFTable = (const GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable; |
| |
| fSubstitutionFilter = new CharSubstitutionFilter(fontInstance); |
| } |
| |
| UnicodeArabicOpenTypeLayoutEngine::~UnicodeArabicOpenTypeLayoutEngine() |
| { |
| delete fSubstitutionFilter; |
| } |
| |
| // "glyphs", "indices" -> glyphs, indices |
| le_int32 UnicodeArabicOpenTypeLayoutEngine::glyphPostProcessing( |
| LEGlyphStorage &tempGlyphStorage, LEGlyphStorage &glyphStorage, LEErrorCode &success) |
| { |
| if (LE_FAILURE(success)) { |
| return 0; |
| } |
| |
| // FIXME: we could avoid the memory allocation and copy if we |
| // made a clone of mapCharsToGlyphs which took the fake glyphs |
| // directly. |
| le_int32 tempGlyphCount = tempGlyphStorage.getGlyphCount(); |
| LEUnicode *tempChars = LE_NEW_ARRAY(LEUnicode, tempGlyphCount); |
| |
| if (tempChars == NULL) { |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| for (le_int32 i = 0; i < tempGlyphCount; i += 1) { |
| tempChars[i] = (LEUnicode) LE_GET_GLYPH(tempGlyphStorage[i]); |
| } |
| |
| glyphStorage.adoptCharIndicesArray(tempGlyphStorage); |
| |
| ArabicOpenTypeLayoutEngine::mapCharsToGlyphs(tempChars, 0, tempGlyphCount, FALSE, |
| TRUE, glyphStorage, success); |
| |
| LE_DELETE_ARRAY(tempChars); |
| |
| return tempGlyphCount; |
| } |
| |
| void UnicodeArabicOpenTypeLayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], |
| le_int32 offset, le_int32 count, le_bool reverse, le_bool /*mirror*/, |
| LEGlyphStorage &glyphStorage, LEErrorCode &success) |
| { |
| if (LE_FAILURE(success)) { |
| return; |
| } |
| |
| if (chars == NULL || offset < 0 || count < 0) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| le_int32 i, dir = 1, out = 0; |
| |
| if (reverse) { |
| out = count - 1; |
| dir = -1; |
| } |
| |
| glyphStorage.allocateGlyphArray(count, reverse, success); |
| |
| for (i = 0; i < count; i += 1, out += dir) { |
| glyphStorage[out] = (LEGlyphID) chars[offset + i]; |
| } |
| } |
| |
| void UnicodeArabicOpenTypeLayoutEngine::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; |
| } |
| |
| GDEFMarkFilter filter(fGDEFTable); |
| |
| adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success); |
| } |