| /* |
| * 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) { |
| |
| 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; |
| } |
| } |
| } |
