| /* | |
| * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. | |
| * 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. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| */ | |
| package sun.font; | |
| import java.awt.Font; | |
| import java.awt.Rectangle; | |
| import java.awt.geom.GeneralPath; | |
| import java.awt.geom.Point2D; | |
| import java.awt.geom.Rectangle2D; | |
| /* | |
| * performance: | |
| * it seems expensive that when using a composite font for | |
| * every char you have to find which "slot" can display it. | |
| * Just the fact that you need to check at all .. | |
| * A composite glyph code ducks this by encoding the slot into the | |
| * glyph code, but you still need to get from char to glyph code. | |
| */ | |
| public final class CompositeStrike extends FontStrike { | |
| static final int SLOTMASK = 0xffffff; | |
| private CompositeFont compFont; | |
| private PhysicalStrike[] strikes; | |
| int numGlyphs = 0; | |
| CompositeStrike(CompositeFont font2D, FontStrikeDesc desc) { | |
| this.compFont = font2D; | |
| this.desc = desc; | |
| this.disposer = new FontStrikeDisposer(compFont, desc); | |
| if (desc.style != compFont.style) { | |
| algoStyle = true; | |
| if ((desc.style & Font.BOLD) == Font.BOLD && | |
| ((compFont.style & Font.BOLD) == 0)) { | |
| boldness = 1.33f; | |
| } | |
| if ((desc.style & Font.ITALIC) == Font.ITALIC && | |
| (compFont.style & Font.ITALIC) == 0) { | |
| italic = 0.7f; | |
| } | |
| } | |
| strikes = new PhysicalStrike[compFont.numSlots]; | |
| } | |
| /* do I need this (see Strike::compositeStrikeForGlyph) */ | |
| PhysicalStrike getStrikeForGlyph(int glyphCode) { | |
| return getStrikeForSlot(glyphCode >>> 24); | |
| } | |
| PhysicalStrike getStrikeForSlot(int slot) { | |
| if (slot >= strikes.length) { | |
| slot = 0; | |
| } | |
| PhysicalStrike strike = strikes[slot]; | |
| if (strike == null) { | |
| strike = | |
| (PhysicalStrike)(compFont.getSlotFont(slot).getStrike(desc)); | |
| strikes[slot] = strike; | |
| } | |
| return strike; | |
| } | |
| public int getNumGlyphs() { | |
| return compFont.getNumGlyphs(); | |
| } | |
| StrikeMetrics getFontMetrics() { | |
| if (strikeMetrics == null) { | |
| StrikeMetrics compMetrics = new StrikeMetrics(); | |
| for (int s=0; s<compFont.numMetricsSlots; s++) { | |
| compMetrics.merge(getStrikeForSlot(s).getFontMetrics()); | |
| } | |
| strikeMetrics = compMetrics; | |
| } | |
| return strikeMetrics; | |
| } | |
| /* Performance tweak: Slot 0 can often return all the glyphs | |
| * Note slot zero doesn't need to be masked. | |
| * Could go a step further and support getting a run of glyphs. | |
| * This would help many locales a little. | |
| * | |
| * Note that if a client constructs an invalid a composite glyph that | |
| * references an invalid slot, that the behaviour is currently | |
| * that this slot index falls through to CompositeFont.getSlotFont(int) | |
| * which will substitute a default font, from which to obtain the | |
| * strike. If its an invalid glyph code for a valid slot, then the | |
| * physical font for that slot will substitute the missing glyph. | |
| */ | |
| void getGlyphImagePtrs(int[] glyphCodes, long[] images, int len) { | |
| PhysicalStrike strike = getStrikeForSlot(0); | |
| int numptrs = strike.getSlot0GlyphImagePtrs(glyphCodes, images, len); | |
| if (numptrs == len) { | |
| return; | |
| } | |
| for (int i=numptrs; i< len; i++) { | |
| strike = getStrikeForGlyph(glyphCodes[i]); | |
| images[i] = strike.getGlyphImagePtr(glyphCodes[i] & SLOTMASK); | |
| } | |
| } | |
| long getGlyphImagePtr(int glyphCode) { | |
| PhysicalStrike strike = getStrikeForGlyph(glyphCode); | |
| return strike.getGlyphImagePtr(glyphCode & SLOTMASK); | |
| } | |
| void getGlyphImageBounds(int glyphCode, Point2D.Float pt, Rectangle result) { | |
| PhysicalStrike strike = getStrikeForGlyph(glyphCode); | |
| strike.getGlyphImageBounds(glyphCode & SLOTMASK, pt, result); | |
| } | |
| Point2D.Float getGlyphMetrics(int glyphCode) { | |
| PhysicalStrike strike = getStrikeForGlyph(glyphCode); | |
| return strike.getGlyphMetrics(glyphCode & SLOTMASK); | |
| } | |
| Point2D.Float getCharMetrics(char ch) { | |
| return getGlyphMetrics(compFont.getMapper().charToGlyph(ch)); | |
| } | |
| float getGlyphAdvance(int glyphCode) { | |
| PhysicalStrike strike = getStrikeForGlyph(glyphCode); | |
| return strike.getGlyphAdvance(glyphCode & SLOTMASK); | |
| } | |
| /* REMIND where to cache? | |
| * The glyph advance is already cached by physical strikes and that's a lot | |
| * of the work. | |
| * Also FontDesignMetrics maintains a latin char advance cache, so don't | |
| * cache advances here as apps tend to hold onto metrics objects when | |
| * performance is sensitive to it. Revisit this assumption later. | |
| */ | |
| float getCodePointAdvance(int cp) { | |
| return getGlyphAdvance(compFont.getMapper().charToGlyph(cp)); | |
| } | |
| Rectangle2D.Float getGlyphOutlineBounds(int glyphCode) { | |
| PhysicalStrike strike = getStrikeForGlyph(glyphCode); | |
| return strike.getGlyphOutlineBounds(glyphCode & SLOTMASK); | |
| } | |
| GeneralPath getGlyphOutline(int glyphCode, float x, float y) { | |
| PhysicalStrike strike = getStrikeForGlyph(glyphCode); | |
| GeneralPath path = strike.getGlyphOutline(glyphCode & SLOTMASK, x, y); | |
| if (path == null) { | |
| return new GeneralPath(); | |
| } else { | |
| return path; | |
| } | |
| } | |
| /* The physical font slot for each glyph is encoded in the glyph ID | |
| * To be as efficient as possible we find a run of glyphs from the | |
| * same slot and create a temporary array of these glyphs decoded | |
| * to the slot. The slot font is then queried for the GeneralPath | |
| * for that run of glyphs. GeneralPaths from each run are appended | |
| * to create the shape for the whole glyph array. | |
| */ | |
| GeneralPath getGlyphVectorOutline(int[] glyphs, float x, float y) { | |
| GeneralPath path = null; | |
| GeneralPath gp; | |
| int glyphIndex = 0; | |
| int[] tmpGlyphs; | |
| while (glyphIndex < glyphs.length) { | |
| int start = glyphIndex; | |
| int slot = glyphs[glyphIndex] >>> 24; | |
| while (glyphIndex < glyphs.length && | |
| (glyphs[glyphIndex+1] >>> 24) == slot) { | |
| glyphIndex++; | |
| } | |
| int tmpLen = glyphIndex-start+1; | |
| tmpGlyphs = new int[tmpLen]; | |
| for (int i=0;i<tmpLen;i++) { | |
| tmpGlyphs[i] = glyphs[i] & SLOTMASK; | |
| } | |
| gp = getStrikeForSlot(slot).getGlyphVectorOutline(tmpGlyphs, x, y); | |
| if (path == null) { | |
| path = gp; | |
| } else if (gp != null) { | |
| path.append(gp, false); | |
| } | |
| } | |
| if (path == null) { | |
| return new GeneralPath(); | |
| } else { | |
| return path; | |
| } | |
| } | |
| } |