J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * |
| 28 | * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include "LETypes.h" |
| 33 | #include "GlyphPositionAdjustments.h" |
| 34 | #include "LEGlyphStorage.h" |
| 35 | #include "LEFontInstance.h" |
| 36 | |
| 37 | #define CHECK_ALLOCATE_ARRAY(array, type, size) \ |
| 38 | if (array == NULL) { \ |
| 39 | array = (type *) new type[size]; \ |
| 40 | } |
| 41 | |
| 42 | GlyphPositionAdjustments::GlyphPositionAdjustments(le_int32 glyphCount) |
| 43 | : fGlyphCount(glyphCount), fEntryExitPoints(NULL), fAdjustments(NULL) |
| 44 | { |
| 45 | fAdjustments = (Adjustment *) new Adjustment[glyphCount]; |
| 46 | } |
| 47 | |
| 48 | GlyphPositionAdjustments::~GlyphPositionAdjustments() |
| 49 | { |
| 50 | delete[] fEntryExitPoints; |
| 51 | delete[] fAdjustments; |
| 52 | } |
| 53 | |
| 54 | const LEPoint *GlyphPositionAdjustments::getEntryPoint(le_int32 index, LEPoint &entryPoint) const |
| 55 | { |
| 56 | if (fEntryExitPoints == NULL) { |
| 57 | return NULL; |
| 58 | } |
| 59 | |
| 60 | return fEntryExitPoints[index].getEntryPoint(entryPoint); |
| 61 | } |
| 62 | |
| 63 | const LEPoint *GlyphPositionAdjustments::getExitPoint(le_int32 index, LEPoint &exitPoint)const |
| 64 | { |
| 65 | if (fEntryExitPoints == NULL) { |
| 66 | return NULL; |
| 67 | } |
| 68 | |
| 69 | return fEntryExitPoints[index].getExitPoint(exitPoint); |
| 70 | } |
| 71 | |
| 72 | void GlyphPositionAdjustments::setEntryPoint(le_int32 index, LEPoint &newEntryPoint, le_bool baselineIsLogicalEnd) |
| 73 | { |
| 74 | CHECK_ALLOCATE_ARRAY(fEntryExitPoints, EntryExitPoint, fGlyphCount); |
| 75 | |
| 76 | fEntryExitPoints[index].setEntryPoint(newEntryPoint, baselineIsLogicalEnd); |
| 77 | } |
| 78 | |
| 79 | void GlyphPositionAdjustments::setExitPoint(le_int32 index, LEPoint &newExitPoint, le_bool baselineIsLogicalEnd) |
| 80 | { |
| 81 | CHECK_ALLOCATE_ARRAY(fEntryExitPoints, EntryExitPoint, fGlyphCount); |
| 82 | |
| 83 | fEntryExitPoints[index].setExitPoint(newExitPoint, baselineIsLogicalEnd); |
| 84 | } |
| 85 | |
| 86 | void GlyphPositionAdjustments::setCursiveGlyph(le_int32 index, le_bool baselineIsLogicalEnd) |
| 87 | { |
| 88 | CHECK_ALLOCATE_ARRAY(fEntryExitPoints, EntryExitPoint, fGlyphCount); |
| 89 | |
| 90 | fEntryExitPoints[index].setCursiveGlyph(baselineIsLogicalEnd); |
| 91 | } |
| 92 | |
| 93 | void GlyphPositionAdjustments::applyCursiveAdjustments(LEGlyphStorage &glyphStorage, le_bool rightToLeft, const LEFontInstance *fontInstance) |
| 94 | { |
| 95 | if (! hasCursiveGlyphs()) { |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | le_int32 start = 0, end = fGlyphCount, dir = 1; |
| 100 | le_int32 firstExitPoint = -1, lastExitPoint = -1; |
| 101 | LEPoint entryAnchor, exitAnchor, pixels; |
| 102 | LEGlyphID lastExitGlyphID = 0; |
| 103 | float baselineAdjustment = 0; |
| 104 | |
| 105 | // This removes a possible warning about |
| 106 | // using exitAnchor before it's been initialized. |
| 107 | exitAnchor.fX = exitAnchor.fY = 0; |
| 108 | |
| 109 | if (rightToLeft) { |
| 110 | start = fGlyphCount - 1; |
| 111 | end = -1; |
| 112 | dir = -1; |
| 113 | } |
| 114 | |
| 115 | for (le_int32 i = start; i != end; i += dir) { |
| 116 | LEGlyphID glyphID = glyphStorage[i]; |
| 117 | |
| 118 | if (isCursiveGlyph(i)) { |
| 119 | if (lastExitPoint >= 0 && getEntryPoint(i, entryAnchor) != NULL) { |
| 120 | float anchorDiffX = exitAnchor.fX - entryAnchor.fX; |
| 121 | float anchorDiffY = exitAnchor.fY - entryAnchor.fY; |
| 122 | |
| 123 | baselineAdjustment += anchorDiffY; |
| 124 | adjustYPlacement(i, baselineAdjustment); |
| 125 | |
| 126 | if (rightToLeft) { |
| 127 | LEPoint secondAdvance; |
| 128 | |
| 129 | fontInstance->getGlyphAdvance(glyphID, pixels); |
| 130 | fontInstance->pixelsToUnits(pixels, secondAdvance); |
| 131 | |
| 132 | adjustXAdvance(i, -(anchorDiffX + secondAdvance.fX)); |
| 133 | } else { |
| 134 | LEPoint firstAdvance; |
| 135 | |
| 136 | fontInstance->getGlyphAdvance(lastExitGlyphID, pixels); |
| 137 | fontInstance->pixelsToUnits(pixels, firstAdvance); |
| 138 | |
| 139 | adjustXAdvance(lastExitPoint, anchorDiffX - firstAdvance.fX); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | lastExitPoint = i; |
| 144 | |
| 145 | if (getExitPoint(i, exitAnchor) != NULL) { |
| 146 | if (firstExitPoint < 0) { |
| 147 | firstExitPoint = i; |
| 148 | } |
| 149 | |
| 150 | lastExitGlyphID = glyphID; |
| 151 | } else { |
| 152 | if (baselineIsLogicalEnd(i) && firstExitPoint >= 0 && lastExitPoint >= 0) { |
| 153 | le_int32 limit = lastExitPoint + dir; |
| 154 | |
| 155 | for (le_int32 j = firstExitPoint; j != limit; j += dir) { |
| 156 | if (isCursiveGlyph(j)) { |
| 157 | adjustYPlacement(j, -baselineAdjustment); |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | firstExitPoint = lastExitPoint = -1; |
| 163 | baselineAdjustment = 0; |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | LEPoint *GlyphPositionAdjustments::EntryExitPoint::getEntryPoint(LEPoint &entryPoint) const |
| 170 | { |
| 171 | if (fFlags & EEF_HAS_ENTRY_POINT) { |
| 172 | entryPoint = fEntryPoint; |
| 173 | return &entryPoint; |
| 174 | } |
| 175 | |
| 176 | return NULL; |
| 177 | } |
| 178 | |
| 179 | LEPoint *GlyphPositionAdjustments::EntryExitPoint::getExitPoint(LEPoint &exitPoint) const |
| 180 | { |
| 181 | if (fFlags & EEF_HAS_EXIT_POINT) { |
| 182 | exitPoint = fExitPoint; |
| 183 | return &exitPoint; |
| 184 | } |
| 185 | |
| 186 | return NULL; |
| 187 | } |