Source Code Cross Referenced for FLFontPeer.java in  » Apache-Harmony-Java-SE » org-package » org » apache » harmony » awt » gl » font » fontlib » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Apache Harmony Java SE » org package » org.apache.harmony.awt.gl.font.fontlib 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         */
017:        package org.apache.harmony.awt.gl.font.fontlib;
018:
019:        import java.awt.font.FontRenderContext;
020:        import java.awt.font.LineMetrics;
021:        import java.awt.geom.AffineTransform;
022:        import java.awt.geom.Rectangle2D;
023:        import java.util.Hashtable;
024:
025:        import org.apache.harmony.awt.gl.font.FontExtraMetrics;
026:        import org.apache.harmony.awt.gl.font.FontManager;
027:        import org.apache.harmony.awt.gl.font.FontPeerImpl;
028:        import org.apache.harmony.awt.gl.font.Glyph;
029:        import org.apache.harmony.awt.gl.font.LineMetricsImpl;
030:
031:        final public class FLFontPeer extends FontPeerImpl {
032:            private static final boolean USE_CONSTANT_METRICS = false;
033:            private static final Hashtable<String, FontPeerNativeHandler> handlersTable = new Hashtable<String, FontPeerNativeHandler>();
034:            private static final Hashtable<Integer, FLGlyph> glyphTable = new Hashtable<Integer, FLGlyph>();
035:
036:            private static long getHandler(String name, int style) {
037:                String hash = name.concat(String.valueOf(style));
038:
039:                FontPeerNativeHandler handl = handlersTable.get(hash);
040:
041:                if (handl == null) {
042:                    handl = new FontPeerNativeHandler(name, style);
043:
044:                    handlersTable.put(hash, handl);
045:                }
046:
047:                handl.incriment();
048:
049:                return handl.getHandl();
050:            }
051:
052:            private static void releaseHandler(String name, int style) {
053:                handlersTable.get(name.concat(String.valueOf(style)))
054:                        .decriment();
055:            }
056:
057:            private static final class FontPeerNativeHandler {
058:                private long pFont;
059:                private char count = 0;
060:                private String name;
061:                private int style;
062:
063:                FontPeerNativeHandler(String name, int style) {
064:                    this .name = name;
065:                    this .style = style;
066:                }
067:
068:                void incriment() {
069:                    if (count == 0) {
070:                        pFont = initFLFontPeer(name, style);
071:
072:                        //System.out.println("pFont = " + pFont + "name = " + name + ", style = " + style);
073:                    }
074:
075:                    if (pFont == 0) {
076:                        throw new NullPointerException();
077:                    }
078:
079:                    count++;
080:                }
081:
082:                void decriment() {
083:                    count--;
084:
085:                    if (count == 0) {
086:                        //System.out.println("native dispose " + pFont);
087:
088:                        dispose(pFont);
089:                    }
090:                }
091:
092:                long getHandl() {
093:                    return pFont;
094:                }
095:
096:            }
097:
098:            private int missingGlyphCode = -1;
099:
100:            private Glyph defGlyph;
101:
102:            public FLFontPeer(String name, int style, int size) {
103:                super ();
104:                //        if (true) throw new  NullPointerException();        
105:                this .size = size;
106:                this .style = style;
107:                this .name = name;
108:
109:                pFont = getHandler(name, style);
110:
111:                getLineMetrics();
112:
113:                /*      if (pFont != 0){
114:                          this.numGlyphs = LinuxNativeFont.getNumGlyphsNative(pFont);
115:                          this.italicAngle = LinuxNativeFont.getItalicAngleNative(pFont, this.fontType);
116:                  }
117:                  
118:                  this.nlm = new LinuxLineMetrics(this, null, " "); //$NON-NLS-1$
119:
120:                  this.ascent = nlm.getLogicalAscent();
121:                  this.descent = nlm.getLogicalDescent();
122:                  this.height = nlm.getHeight();
123:                  this.leading = nlm.getLogicalLeading();
124:                  this.maxAdvance = nlm.getLogicalMaxCharWidth();
125:
126:                  if (this.fontType == FontManager.FONT_TYPE_T1){
127:                      this.defaultChar = 1;
128:                  } else {
129:                      this.defaultChar = 0;
130:                  }
131:
132:                  this.maxCharBounds = new Rectangle2D.Float(0, -nlm.getAscent(), nlm.getMaxCharWidth(), this.height);
133:
134:                 */
135:
136:                maxCharBounds = new Rectangle2D.Float(0, -nlm.getAscent(), nlm
137:                        .getMaxCharWidth(), nlm.getHeight());
138:
139:                //if (pFont == 0) throw new  NullPointerException();    
140:
141:                //System.out.println("create font size " + size + " style " + style + " name " + name + " pFont " + pFont);
142:            }
143:
144:            @Override
145:            public FontExtraMetrics getExtraMetrics() {
146:                // TODO Auto-generated method stub
147:                return null;
148:            }
149:
150:            @Override
151:            public LineMetrics getLineMetrics(String str,
152:                    FontRenderContext frc, AffineTransform at) {
153:                /*
154:                 * metrics[0] - ascent<p>
155:                 * metrics[1] - descent<p>
156:                 * metrics[2] - external leading<p>
157:                 * metrics[3] - underline thickness<p>
158:                 * -metrics[4] - underline offset<p>
159:                 * metrics[5] - strikethrough thickness<p>
160:                 * -metrics[6] - strikethrough offset<p>
161:                 * metrics[7] - maximum char width<p>*/
162:
163:                /*System.out.println("LineMetrics length " + metrics.length + " Font " + pFont);
164:                for (int i = 0; i < metrics.length; i ++) {
165:                    System.out.println(metrics[i]);
166:                }//*/
167:
168:                /**
169:                 * Creates LineMetricsImpl object from specified parameters. If baseline data parameter
170:                 * is null than {0, (-ascent+descent)/2, -ascent} values are used for baseline offsets.
171:                 *  
172:                 * @param _numChars number of chars 
173:                 * @param _baseLineIndex index of the baseline offset
174:                 * @param _baselineOffsets an array of baseline offsets
175:                 * @param _underlineThickness underline thickness
176:                 * @param _underlineOffset underline offset
177:                 * @param _strikethroughThickness strikethrough thickness
178:                 * @param _strikethroughOffset strinkethrough offset
179:                 * @param _leading leading of the font
180:                 * @param _height font height
181:                 * @param _ascent ascent of the font
182:                 * @param _descent descent of the font
183:                 * @param _maxCharWidth max char width
184:                 *
185:                public LineMetricsImpl(int _numChars, int _baseLineIndex,
186:                        float[] _baselineOffsets, float _underlineThickness,
187:                        float _underlineOffset, float _strikethroughThickness,
188:                        float _strikethroughOffset, float _leading, float _height,
189:                        float _ascent, float _descent, float _maxCharWidth) {*/
190:
191:                //        System.out.println("LineMetricsImpl");
192:
193:                LineMetricsImpl lm;
194:                if (USE_CONSTANT_METRICS) {
195:                    float height = size;
196:                    float ascent = canDisplay('H') ? getGlyph('H').getHeight()
197:                            : (height * 3) / 4;
198:                    float descent = canDisplay('p') ? (float) getGlyph('p')
199:                            .getGlyphMetrics().getBounds2D().getMaxY()
200:                            : height / 4;
201:
202:                    lm = new LineMetricsImpl(
203:                            str.length(), //_numChars number of chars 
204:                            0, //_baseLineIndex index of the baseline offset
205:                            new float[] { 0, (-ascent + descent) / 2, -ascent }, //_baselineOffsets an array of baseline offsets
206:                            ascent / 13, //_underlineThickness underline thickness
207:                            -descent / 2, //_underlineOffset underline offset
208:                            ascent / 13, //_strikethroughThickness strikethrough thickness
209:                            ascent / 2, //_strikethroughOffset strinkethrough offset
210:                            height - ascent - descent, //_leading leading of the font
211:                            height, //_height font height
212:                            ascent, //_ascent ascent of the font
213:                            descent, //_descent descent of the font
214:                            canDisplay('W') ? getGlyph('W').getWidth()
215:                                    : getGlyph(' ').getWidth()); //_maxCharWidth max char width
216:
217:                } else {
218:                    float[] metrics = getLineMetrics(pFont);
219:                    lm = new LineMetricsImpl(str.length(), //_numChars number of chars 
220:                            0, //_baseLineIndex index of the baseline offset
221:                            new float[] { 0,
222:                                    (-metrics[0] + metrics[1]) * size / 2,
223:                                    -metrics[0] * size }, //_baselineOffsets an array of baseline offsets
224:                            metrics[3] * size, //_underlineThickness underline thickness
225:                            metrics[4] * size, //_underlineOffset underline offset
226:                            metrics[5] * size, //_strikethroughThickness strikethrough thickness
227:                            metrics[6] * size, //_strikethroughOffset strinkethrough offset
228:                            metrics[2] * size, //_leading leading of the font
229:                            (metrics[0] + metrics[1] + metrics[2]) * size, //_height font height
230:                            metrics[0] * size, //_ascent ascent of the font
231:                            metrics[1] * size, //_descent descent of the font
232:                            metrics[7] * size); //_maxCharWidth max char width
233:                }
234:
235:                if ((at != null) && (!at.isIdentity())) {
236:                    lm.scale((float) at.getScaleX(), (float) at.getScaleY());
237:                }
238:
239:                return lm;
240:            }
241:
242:            @Override
243:            public String getPSName() {
244:                psName = getPSName(pFont);
245:                return psName;
246:            }
247:
248:            @Override
249:            public int getMissingGlyphCode() {
250:                if (missingGlyphCode == -1) {
251:                    missingGlyphCode = getMissingGlyphCode(pFont);
252:                }
253:                return missingGlyphCode;
254:            }
255:
256:            @Override
257:            public Glyph getGlyph(char ch) {
258:                Integer id = new Integer((size << 8) + ch);
259:
260:                if (!glyphTable.containsKey(id)) {
261:                    //System.out.println("size = " + size + ", char " + ch + ", id = " + id);
262:                    glyphTable.put(id, new FLGlyph(ch, pFont, size));
263:                }
264:
265:                return glyphTable.get(id);
266:            }
267:
268:            @Override
269:            public void dispose() {
270:                ((FLFontManager) FontManager.getInstance())
271:                        .removeFontFromHash(this );
272:
273:                //System.out.println("dispose " + pFont);
274:
275:                releaseHandler(name, style);
276:
277:                //dispose(pFont);        
278:            }
279:
280:            @Override
281:            public Glyph getDefaultGlyph() {
282:                if (defGlyph == null) {
283:                    defGlyph = getGlyph((char) 0);
284:                }
285:                return defGlyph;
286:            }
287:
288:            @Override
289:            public boolean canDisplay(char c) {
290:                return canDisplay(c, pFont);
291:            }
292:
293:            @Override
294:            public char getUnicodeByIndex(int glyphCode) {
295:                return getUnicodeByIndex(glyphCode, pFont);
296:            }
297:
298:            private static native long initFLFontPeer(String family, int style);
299:
300:            private static native float[] getLineMetrics(long fontPeerPointer);
301:
302:            private static native String getPSName(long fontPeerPointer);
303:
304:            private static native int getMissingGlyphCode(long fontPeerPointer);
305:
306:            private static native void dispose(long fontPeerPointer);
307:
308:            private static native boolean canDisplay(char c,
309:                    long fontPeerPointer);
310:
311:            private static native char getUnicodeByIndex(int glyphCode,
312:                    long fontPeerPointer);
313:        }
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