1b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru/* 2b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru * 350294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho * (C) Copyright IBM Corp. 1998-2010 - All Rights Reserved 4b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru * 5b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru */ 6b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 7b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "LETypes.h" 8b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "LEFontInstance.h" 9b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "OpenTypeTables.h" 10b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "AnchorTables.h" 11b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "MarkArrays.h" 12b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "GlyphPositioningTables.h" 13b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "AttachmentPosnSubtables.h" 14b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "MarkToBasePosnSubtables.h" 15b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "GlyphIterator.h" 16b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru#include "LESwaps.h" 17b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 18b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste QueruU_NAMESPACE_BEGIN 19b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 20b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste QueruLEGlyphID MarkToBasePositioningSubtable::findBaseGlyph(GlyphIterator *glyphIterator) const 21b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru{ 22b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru if (glyphIterator->prev()) { 23b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return glyphIterator->getCurrGlyphID(); 24b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } 25b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 26b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return 0xFFFF; 27b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru} 28b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 29b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Querule_int32 MarkToBasePositioningSubtable::process(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const 30b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru{ 31b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru LEGlyphID markGlyph = glyphIterator->getCurrGlyphID(); 32b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru le_int32 markCoverage = getGlyphCoverage((LEGlyphID) markGlyph); 33b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 34b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru if (markCoverage < 0) { 35b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // markGlyph isn't a covered mark glyph 36b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return 0; 37b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } 38b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 39b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru LEPoint markAnchor; 40b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru const MarkArray *markArray = (const MarkArray *) ((char *) this + SWAPW(markArrayOffset)); 41b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru le_int32 markClass = markArray->getMarkClass(markGlyph, markCoverage, fontInstance, markAnchor); 42b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru le_uint16 mcCount = SWAPW(classCount); 43b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 44b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru if (markClass < 0 || markClass >= mcCount) { 45b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // markGlyph isn't in the mark array or its 46b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // mark class is too big. The table is mal-formed! 47b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return 0; 48b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } 49b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 50b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // FIXME: We probably don't want to find a base glyph before a previous ligature... 51b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru GlyphIterator baseIterator(*glyphIterator, (le_uint16) (lfIgnoreMarks /*| lfIgnoreLigatures*/)); 52b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru LEGlyphID baseGlyph = findBaseGlyph(&baseIterator); 53b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru le_int32 baseCoverage = getBaseCoverage((LEGlyphID) baseGlyph); 54b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru const BaseArray *baseArray = (const BaseArray *) ((char *) this + SWAPW(baseArrayOffset)); 55b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru le_uint16 baseCount = SWAPW(baseArray->baseRecordCount); 56b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 57b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru if (baseCoverage < 0 || baseCoverage >= baseCount) { 58b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // The base glyph isn't covered, or the coverage 59b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // index is too big. The latter means that the 60b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // table is mal-formed... 61b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return 0; 62b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } 63b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 64b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru const BaseRecord *baseRecord = &baseArray->baseRecordArray[baseCoverage * mcCount]; 65b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru Offset anchorTableOffset = SWAPW(baseRecord->baseAnchorTableOffsetArray[markClass]); 66b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru const AnchorTable *anchorTable = (const AnchorTable *) ((char *) baseArray + anchorTableOffset); 67b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru LEPoint baseAnchor, markAdvance, pixels; 68b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 69b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru if (anchorTableOffset == 0) { 70b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru // this means the table is mal-formed... 71b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru glyphIterator->setCurrGlyphBaseOffset(baseIterator.getCurrStreamPosition()); 72b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return 0; 73b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } 74b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 75b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru anchorTable->getAnchor(baseGlyph, fontInstance, baseAnchor); 76b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 77b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru fontInstance->getGlyphAdvance(markGlyph, pixels); 78b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru fontInstance->pixelsToUnits(pixels, markAdvance); 79b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 80b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru float anchorDiffX = baseAnchor.fX - markAnchor.fX; 81b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru float anchorDiffY = baseAnchor.fY - markAnchor.fY; 82b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 83b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru glyphIterator->setCurrGlyphBaseOffset(baseIterator.getCurrStreamPosition()); 84b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 85b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru if (glyphIterator->isRightToLeft()) { 8650294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho // FIXME: need similar patch to below; also in MarkToLigature and MarkToMark 8750294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho // (is there a better way to approach this for all the cases?) 88b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX, anchorDiffY, -markAdvance.fX, -markAdvance.fY); 89b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } else { 90b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru LEPoint baseAdvance; 91b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 92b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru fontInstance->getGlyphAdvance(baseGlyph, pixels); 9350294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho 9450294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho //JK: adjustment needs to account for non-zero advance of any marks between base glyph and current mark 9550294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho GlyphIterator gi(baseIterator, (le_uint16)0); // copy of baseIterator that won't ignore marks 9650294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho gi.next(); // point beyond the base glyph 9750294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho while (gi.getCurrStreamPosition() < glyphIterator->getCurrStreamPosition()) { // for all intervening glyphs (marks)... 9850294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho LEGlyphID otherMark = gi.getCurrGlyphID(); 9950294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho LEPoint px; 10050294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho fontInstance->getGlyphAdvance(otherMark, px); // get advance, in case it's non-zero 10150294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho pixels.fX += px.fX; // and add that to the base glyph's advance 10250294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho pixels.fY += px.fY; 10350294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho gi.next(); 10450294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho } 10550294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho // end of JK patch 10650294ead5e5d23f5bbfed76e00e6b510bd41eee1claireho 107b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru fontInstance->pixelsToUnits(pixels, baseAdvance); 108b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 109b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX - baseAdvance.fX, anchorDiffY - baseAdvance.fY, -markAdvance.fX, -markAdvance.fY); 110b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru } 111b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 112b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru return 1; 113b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru} 114b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste Queru 115b13da9df870a61b11249bf741347908dbea0edd8Jean-Baptiste QueruU_NAMESPACE_END 116