Source Code Cross Referenced for WindowsFont.java in  » Apache-Harmony-Java-SE » org-package » org » apache » harmony » awt » gl » font » 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 
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:        /**
018:         * @author Ilya S. Okomin
019:         * @version $Revision$
020:         */package org.apache.harmony.awt.gl.font;
021:
022:        import java.awt.Font;
023:        import java.awt.font.FontRenderContext;
024:        import java.awt.font.LineMetrics;
025:        import java.awt.geom.AffineTransform;
026:        import java.awt.geom.Rectangle2D;
027:        import java.awt.image.BufferedImage;
028:        import java.awt.image.DataBuffer;
029:        import java.awt.image.IndexColorModel;
030:        import java.awt.image.Raster;
031:        import java.awt.image.WritableRaster;
032:        import java.io.IOException;
033:        import java.util.Hashtable;
034:        import java.util.Locale;
035:
036:        import org.apache.harmony.awt.gl.font.FontPeerImpl;
037:        import org.apache.harmony.awt.gl.font.Glyph;
038:        import org.apache.harmony.awt.gl.font.LineMetricsImpl;
039:        import org.apache.harmony.awt.internal.nls.Messages;
040:
041:        /**
042:         * Windows platform font peer implementation based on GDI font object.
043:         */
044:        public class WindowsFont extends FontPeerImpl {
045:
046:            // table with loaded cached Glyphs
047:            private final Hashtable<Integer, WinGlyph> glyphs = new Hashtable<Integer, WinGlyph>();
048:            // table with loaded glyph codes
049:            private final Hashtable<Integer, Integer> glyphCodes = new Hashtable<Integer, Integer>();
050:
051:            // Pairs of [begin, end],[..].. unicode ranges values 
052:            private int[] fontUnicodeRanges;
053:
054:            public WindowsFont(String fontName, int fontStyle, int fontSize) {
055:                this .size = fontSize;
056:                this .style = fontStyle;
057:                this .name = fontName;
058:                this .fontFamilyName = name;
059:
060:                pFont = NativeFont.initializeFont(this , fontName, fontStyle,
061:                        fontSize);
062:
063:                initWindowsFont();
064:
065:            }
066:
067:            public void initWindowsFont() {
068:
069:                this .fontType = NativeFont.getFontType(name, style);
070:
071:                // Font Metrics init
072:                getDefaultLineMetrics();
073:
074:                this .ascent = nlm.getLogicalAscent();
075:                this .descent = nlm.getLogicalDescent();
076:                this .height = (int) nlm.getHeight();
077:                this .leading = nlm.getLogicalLeading();
078:                this .maxAdvance = nlm.getLogicalMaxCharWidth();
079:
080:                this .maxCharBounds = new Rectangle2D.Float(0, -nlm.getAscent(),
081:                        nlm.getMaxCharWidth(), nlm.getHeight());
082:                this .italicAngle = NativeFont.getItalicAngleNative(pFont);
083:
084:                this .numGlyphs = 0;
085:                //TODO: implement NativeFont.getNumGlyphs(pFont, fontType);
086:
087:                if (this .fontType == FontManager.FONT_TYPE_T1) {
088:                    this .defaultChar = 1;
089:                }
090:                //      this.defaultChar = NativeFont.getDefaultCharNative(pFont);
091:
092:                //        addGlyphs((char) 0x20, (char) 0x7E);
093:            }
094:
095:            /**
096:             * Returns true if the specified character can be displayed by this
097:             * WindowsFont. 
098:             * @param chr the specified character
099:             */
100:            @Override
101:            public boolean canDisplay(char chr) {
102:                return isGlyphExists(chr);
103:            }
104:
105:            /**
106:             * Adds range of existing glyphs to this WindowsFont object
107:             * @param uFirst the lowest range's bound, inclusive 
108:             * @param uLast the highest range's bound, exclusive
109:             */
110:
111:            public void addGlyphs(char uFirst, char uLast) {
112:                char index = uFirst;
113:                if (uLast < uFirst) {
114:                    // awt.09=min range bound value is grater than max range bound
115:                    throw new IllegalArgumentException(Messages
116:                            .getString("awt.09")); //$NON-NLS-1$
117:                }
118:                while (index < uLast) {
119:                    addGlyph(index);
120:                    index++;
121:                }
122:            }
123:
124:            /**
125:             * Add existing glyph to this WindowsFont object.
126:             * @param uChar the specified character
127:             * @return true if glyph of the specified character exists in this
128:             * WindowsFont or this character is escape sequence character.
129:             */
130:            public boolean addGlyph(char uChar) {
131:                boolean result = false;
132:                boolean isEscape = false;
133:
134:                isEscape = ((uChar == '\t') || (uChar == '\n') || (uChar == '\r'));
135:
136:                if (isEscape || this .isGlyphExists(uChar)) {
137:                    glyphs.put(Integer.valueOf(uChar), new WinGlyph(this .pFont,
138:                            this .getSize(), uChar, NativeFont
139:                                    .getGlyphCodeNative(this .pFont, uChar)));
140:                    result = true;
141:                }
142:
143:                return result;
144:            }
145:
146:            /**
147:             * Checks whether given Glyph belongs to any font supported unicode range.
148:             * @param uIndex specified character
149:             * @return true if specified character in unicode ranges, false otherwise
150:             */
151:            public boolean isGlyphExists(char uIndex) {
152:                for (int i = 0; i < fontUnicodeRanges.length - 1; i += 2) {
153:                    if (uIndex <= fontUnicodeRanges[i + 1]) {
154:                        if (uIndex >= fontUnicodeRanges[i]) {
155:                            return true;
156:                        }
157:                        return false;
158:                    }
159:                }
160:
161:                return false;
162:            }
163:
164:            /**
165:             *  Returns an array of unicode ranges that are supported by this WindowsFont. 
166:             */
167:            public int[] getUnicodeRanges() {
168:                int[] ranges = new int[fontUnicodeRanges.length];
169:                System.arraycopy(fontUnicodeRanges, 0, ranges, 0,
170:                        fontUnicodeRanges.length);
171:                return ranges;
172:            }
173:
174:            /**
175:             * Initializes the array of unicode ranges that are supported by this 
176:             * WindowsFont with the values from the specified array.
177:             * @param ranges the array of unicode ranges values 
178:             */
179:            public void setUnicodeRanges(int[] ranges) {
180:                if (ranges != null) {
181:                    fontUnicodeRanges = new int[ranges.length];
182:                    System.arraycopy(ranges, 0, fontUnicodeRanges, 0,
183:                            ranges.length);
184:                }
185:            }
186:
187:            /**
188:             * Returns Glyph object for the specified character in this WindowsFont.
189:             * Default Glyph object returned if the specified character 
190:             * doesn't exist in the WindowsFont  
191:             * @param index the specified character
192:             */
193:            @Override
194:            public Glyph getGlyph(char index) {
195:                Glyph result = null;
196:                Integer key = Integer.valueOf(index);
197:                if (glyphs.containsKey(key)) {
198:                    result = glyphs.get(key);
199:                } else {
200:                    if (this .addGlyph(index)) {
201:                        result = glyphs.get(key);
202:                    } else {
203:                        result = this .getDefaultGlyph();
204:                    }
205:                }
206:                return result;
207:            }
208:
209:            /**
210:             * Returns default Glyph object of this WindowsFont.
211:             */
212:            @Override
213:            public Glyph getDefaultGlyph() {
214:                Glyph result;
215:                Integer defaultKey = Integer.valueOf(defaultChar);
216:
217:                if (glyphs.containsKey(defaultKey)) {
218:                    result = glyphs.get(defaultKey);
219:                } else {
220:                    if (this .fontType == FontManager.FONT_TYPE_T1) {
221:                        // XXX: !! Type1 has no default glyphs
222:                        glyphs.put(defaultKey, new WinGlyph(defaultChar,
223:                                defaultChar));
224:                        result = glyphs.get(defaultKey);
225:                    } else {
226:                        glyphs.put(defaultKey, new WinGlyph(this .pFont, this 
227:                                .getSize(), defaultChar, NativeFont
228:                                .getGlyphCodeNative(this .pFont, defaultChar)));
229:                        result = glyphs.get(defaultKey);
230:                    }
231:                }
232:
233:                return result;
234:
235:            }
236:
237:            /**
238:             * Returns string image, that can be blitted onto a BufferedImageGraphics2D.
239:             * @param str the specified string
240:             * @return a BufferedImage object that is the representation of the rendered
241:             * string
242:             */
243:            public BufferedImage getStringImage(String str) {
244:                // !! this method isn't used now, 
245:                // need to be modified with proper transparency parameters
246:                int height = this .ascent + this .descent;
247:                int width;
248:                int baseXOffset = 0; // X Offset of the Glyph cell along the base line
249:                int drawXOffset = 0; // X Offset of the Glyph image along the base line
250:                int drawYOffset = 0;
251:                Glyph[] gls = this .getGlyphs(str);
252:
253:                // total width of the glyph vector is equal to the sum of their advances -
254:                // LSB of the first glyph - RSB of the last glyph
255:                width = Math.max(-(int) gls[0].getGlyphPointMetrics().getLSB(),
256:                        0);
257:                baseXOffset = Math.max(-(int) gls[0].getGlyphPointMetrics()
258:                        .getLSB(), 0);
259:
260:                for (Glyph element : gls) {
261:                    width += element.getGlyphPointMetrics().getAdvanceX();
262:                }
263:
264:                width += Math.max(-(int) gls[gls.length - 1]
265:                        .getGlyphPointMetrics().getRSB(), 0);
266:
267:                WritableRaster wr = Raster.createPackedRaster(
268:                        DataBuffer.TYPE_BYTE, width, height, 1, 1, null);
269:
270:                for (Glyph curGlyph : gls) {
271:                    drawYOffset = this .ascent
272:                            + (int) Math.ceil(curGlyph.getGlyphPointMetrics()
273:                                    .getBounds2D().getY()) - 1;
274:                    drawXOffset = baseXOffset
275:                            + (int) Math.ceil(curGlyph.getGlyphPointMetrics()
276:                                    .getLSB());
277:
278:                    wr.setDataElements(drawXOffset, drawYOffset,
279:                            ((WinGlyph) curGlyph).getImage().getRaster());
280:
281:                    baseXOffset += curGlyph.getGlyphPointMetrics()
282:                            .getAdvanceX();
283:                }
284:
285:                byte[] blackWhite = new byte[] { 0, (byte) 0xff };
286:                IndexColorModel colorModel = new IndexColorModel(1, 2,
287:                        blackWhite, blackWhite, blackWhite);
288:
289:                BufferedImage stringImage = new BufferedImage(colorModel, wr,
290:                        false, null);
291:                return stringImage;
292:            }
293:
294:            // Font Dependent methods
295:
296:            /**
297:             * Returns locale dependent family name of this WindowsFont. 
298:             */
299:            @Override
300:            public String getFamily(Locale l) {
301:                if (this .fontType == FontManager.FONT_TYPE_T1) {
302:                    return this .name;
303:                }
304:
305:                //TODO: implement
306:                return this .getFamily();
307:            }
308:
309:            /**
310:             * Returns locale dependent face name of this WindowsFont.
311:             */
312:            @Override
313:            public String getFontName(Locale l) {
314:                if (this .fontType == FontManager.FONT_TYPE_T1) {
315:                    return this .name;
316:                }
317:
318:                return this .getFontName();
319:            }
320:
321:            /**
322:             * Returns a clone of LineMetrics object that contains metrics of this 
323:             * WindowsFont.
324:             */
325:            private LineMetricsImpl getDefaultLineMetrics() {
326:                // TODO: implement baseline offsets for TrueType fonts
327:                if (nlm != null) {
328:                    return (LineMetricsImpl) nlm.clone();
329:                }
330:                float[] metrics = NativeFont.getNativeLineMetrics(this 
331:                        .getFontHandle(), this .getSize(), false, false, this 
332:                        .getFontType());
333:                int _numChars = 0;
334:
335:                nlm = new LineMetricsImpl(_numChars, metrics, null);
336:                return (LineMetricsImpl) nlm.clone();
337:            }
338:
339:            /**
340:             * Returns a LineMetrics object that contains text metrics of this 
341:             * WindowsFont.
342:             */
343:            @Override
344:            public LineMetrics getLineMetrics(String str,
345:                    FontRenderContext frc, AffineTransform at) {
346:                AffineTransform frcAt = null;
347:                LineMetricsImpl lm = getDefaultLineMetrics();
348:                lm.setNumChars(str.length());
349:
350:                if (frc != null)
351:                    frcAt = frc.getTransform();
352:
353:                if ((at != null) && (!at.isIdentity())) {
354:                    if (frcAt != null)
355:                        at.concatenate(frcAt);
356:                    lm.scale((float) at.getScaleX(), (float) at.getScaleY());
357:                } else if ((frcAt != null) && (!frcAt.isIdentity())) {
358:                    lm.scale((float) frcAt.getScaleX(), (float) frcAt
359:                            .getScaleY());
360:                }
361:
362:                return lm;
363:            }
364:
365:            /**
366:             * Return Font object if it was successfully embedded in the system.
367:             */
368:            public static Font embedFont(String absolutePath)
369:                    throws IOException {
370:                return NativeFont.embedFont(absolutePath);
371:            }
372:
373:            /**
374:             * Dispose all native resources and deleting temporary font file
375:             * if this WindowsFont object was created from stream.
376:             */
377:            @Override
378:            public void dispose() {
379:                if (pFont != 0) {
380:                    NativeFont.pFontFree(pFont);
381:                    pFont = 0;
382:
383:                    if (isCreatedFromStream()) {
384:                        NativeFont.RemoveFontResource(getTempFontFileName());
385:                    }
386:
387:                }
388:            }
389:
390:            /**
391:             * Returns postscript name of this WindowsFont.
392:             */
393:            @Override
394:            public String getPSName() {
395:                if (psName == null) {
396:                    // TODO: implement method
397:                    psName = getFontName();
398:                }
399:                return psName;
400:            }
401:
402:            @Override
403:            public int getMissingGlyphCode() {
404:                return getDefaultGlyph().getGlyphCode();
405:            }
406:
407:            /**
408:             * Returns the advance width of the specified char of this WindowsFont. 
409:             * @param ind the char which width is to be returned
410:             * @return the advance width of the specified char of this WindowsFont 
411:             */
412:            @Override
413:            public int charWidth(int ind) {
414:                return charWidth((char) ind);
415:            }
416:
417:            /**
418:             * Returns face name of this WindowsFont.
419:             */
420:            @Override
421:            public String getFontName() {
422:                if (faceName == null) {
423:                    if (this .fontType == FontManager.FONT_TYPE_T1) {
424:                        faceName = getFamily();
425:                    } else {
426:                        faceName = NativeFont.getFontNameNative(this .pFont);
427:                    }
428:                }
429:
430:                return faceName;
431:            }
432:
433:            /**
434:             * Returns unicode by index from the 'cmap' table of this font.
435:             */
436:            @Override
437:            public char getUnicodeByIndex(int glyphCode) {
438:                char result;
439:
440:                if (glyphCodes.isEmpty()) {
441:                    for (int i = 0; i < fontUnicodeRanges.length - 1; i += 2) {
442:                        for (int j = fontUnicodeRanges[i]; j <= fontUnicodeRanges[i + 1]; j++) {
443:                            int code = NativeFont.getGlyphCodeNative(pFont,
444:                                    (char) j);
445:                            glyphCodes.put(code, j);
446:                        }
447:                    }
448:                }
449:
450:                if (glyphCodes.containsKey(glyphCode)) {
451:                    result = (char) glyphCodes.get(glyphCode).intValue();
452:                } else {
453:                    result = defaultChar;
454:                }
455:
456:                return result;
457:            }
458:
459:            /**
460:             * Returns initiated FontExtraMetrics instance of this WindowsFont.
461:             */
462:            @Override
463:            public FontExtraMetrics getExtraMetrics() {
464:                if (extraMetrix == null) {
465:
466:                    //!! for Type1 fonts 'x' char width used as average char width
467:                    float[] metrics = NativeFont.getExtraMetricsNative(this 
468:                            .getFontHandle(), this .size, this .fontType);
469:                    if (fontType == FontManager.FONT_TYPE_T1) {
470:                        metrics[0] = charWidth('x');
471:                    }
472:                    extraMetrix = new FontExtraMetrics(metrics);
473:                }
474:                return extraMetrix;
475:            }
476:
477:        }
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