Source Code Cross Referenced for DrawableTextRenderer.java in  » Apache-Harmony-Java-SE » org-package » org » apache » harmony » awt » gl » linux » 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.linux 
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.linux;
021:
022:        import java.awt.Color;
023:        import java.awt.Graphics2D;
024:        import java.awt.font.GlyphVector;
025:        import java.awt.geom.AffineTransform;
026:        import java.awt.geom.Point2D;
027:        import java.awt.RenderingHints;
028:
029:        import org.apache.harmony.awt.gl.CommonGraphics2D;
030:        import org.apache.harmony.awt.gl.TextRenderer;
031:        import org.apache.harmony.awt.gl.font.CommonGlyphVector;
032:        import org.apache.harmony.awt.gl.font.CompositeFont;
033:        import org.apache.harmony.awt.gl.font.FontManager;
034:        import org.apache.harmony.awt.gl.font.FontPeerImpl;
035:        import org.apache.harmony.awt.gl.font.Glyph;
036:        import org.apache.harmony.awt.gl.font.LinuxFont;
037:        import org.apache.harmony.awt.gl.font.LinuxNativeFont;
038:
039:        import org.apache.harmony.awt.nativebridge.linux.X11;
040:
041:        /**
042:         *
043:         *  Linux text renderer, works using XFT text rendering
044:         */
045:        public class DrawableTextRenderer extends TextRenderer {
046:
047:            /** Singleton DrawableTextRenderer instance */
048:            public static final DrawableTextRenderer inst = new DrawableTextRenderer();
049:
050:            // X11 instance
051:            static final X11 x11 = X11.getInstance();
052:
053:            boolean isAntialiasingHintSet(Graphics2D g) {
054:                Object value = g
055:                        .getRenderingHint(RenderingHints.KEY_ANTIALIASING);
056:                return (value == RenderingHints.VALUE_ANTIALIAS_ON);
057:            }
058:
059:            public void drawString(Graphics2D ga, String str, float x, float y) {
060:                CommonGraphics2D g = (CommonGraphics2D) ga;
061:                AffineTransform trans = g.getTransform();
062:                double xOffset = x + trans.getTranslateX();
063:                double yOffset = y + trans.getTranslateY();
064:
065:                FontPeerImpl fnt = (FontPeerImpl) g.getFont().getPeer();
066:
067:                if (fnt.getClass() == CompositeFont.class) {
068:                    drawCompositeString(g, str, xOffset, yOffset);
069:                } else {
070:                    drawNormalString(g, str, xOffset, yOffset);
071:                }
072:
073:            }
074:
075:            /**
076:             * Returns XColor structure corresponding to the desired Color.
077:             * @param color specified Color
078:             */
079:            static X11.XColor getXColor(Color color) {
080:                X11.XColor xcolor = x11.createXColor(false);
081:
082:                xcolor.set_green((short) (color.getGreen() << 8));
083:                xcolor.set_blue((short) (color.getBlue() << 8));
084:                xcolor.set_red((short) (color.getRed() << 8));
085:
086:                return xcolor;
087:            }
088:
089:            /**
090:             * Method to draw string with graphics that has physical font
091:             *  at desired coordinates.
092:             * 
093:             * @param g CommonGraphics2D to draw onto
094:             * @param str String to draw
095:             * @param x starting X coordinate to draw at
096:             * @param y starting Y coordinate to draw at
097:             */
098:            public void drawNormalString(CommonGraphics2D g, String str,
099:                    double x, double y) {
100:                XGraphics2D xg2d = (XGraphics2D) g;
101:
102:                long display = xg2d.display;
103:                int screen = xg2d.xConfig.dev.screen;
104:                long colormap = x11.XDefaultColormap(display, screen);
105:
106:                LinuxFont peer = (LinuxFont) g.getFont().getPeer();
107:
108:                X11.XColor xcolor = getXColor(g.getColor());
109:                long xcolorPtr = xcolor.lock();
110:
111:                /*
112:                 * Work around for escape-subsequences.
113:                 * We don't draw anything instead of \n,\r,\t
114:                 *
115:                 * */
116:                char[] outChars = new char[str.length()];
117:                char[] inChars = str.toCharArray();
118:                int j = 0;
119:                for (int i = 0; i < inChars.length; i++) {
120:                    if (peer.getFontType() == FontManager.FONT_TYPE_T1) {
121:                        if (!peer.isGlyphExists(inChars[i])) {
122:                            continue;
123:                        }
124:                    }
125:
126:                    switch (inChars[i]) {
127:                    case '\n':
128:                    case '\r':
129:                    case '\t':
130:                        break;
131:                    default:
132:                        outChars[j] = inChars[i];
133:                        j++;
134:                    }
135:                }
136:                if (inChars.length != 0) {
137:                    LinuxNativeFont.drawStringNative(xg2d.xftDraw, display,
138:                            colormap, peer
139:                                    .getFontHandle(isAntialiasingHintSet(g)),
140:                            (int) Math.round(x), (int) Math.round(y), outChars,
141:                            j, xcolorPtr);
142:                }
143:                xcolor.unlock();
144:
145:            }
146:
147:            /**
148:             * Method to draw string with graphics that has composite font
149:             *  at desired coordinates.
150:             * 
151:             * @param g CommonGraphics2D to draw onto
152:             * @param str String to draw
153:             * @param x starting X coordinate to draw at
154:             * @param y starting Y coordinate to draw at
155:             */
156:            public void drawCompositeString(CommonGraphics2D g, String str,
157:                    double x, double y) {
158:                XGraphics2D xg2d = (XGraphics2D) g;
159:
160:                long display = xg2d.display;
161:                int screen = xg2d.xConfig.dev.screen;
162:                long colormap = x11.XDefaultColormap(display, screen);
163:
164:                X11.XColor xcolor = getXColor(g.getColor());
165:                long xcolorPtr = xcolor.lock();
166:
167:                CompositeFont wcf = (CompositeFont) (g.getFont().getPeer());
168:                long font = 0;
169:                int xOffset = (int) Math.round(x); // X offset to draw
170:                int yOffset = (int) Math.round(y); // Y offset to draw
171:                int offs = 0; // width of substring with the same font header
172:                String sChars = new String();
173:                char chars[];
174:                for (int i = 0; i < str.length(); i++) {
175:                    char c = str.charAt(i);
176:                    Glyph gl = wcf.getGlyph(c);
177:                    if (font == 0) {
178:                        font = gl.getPFont();
179:                    }
180:                    int glWidth = Math.round(gl.getGlyphPointMetrics()
181:                            .getAdvance());
182:                    if (glWidth == 0) {
183:                        continue;
184:                    }
185:                    long glPFont = gl.getPFont();
186:                    if (font != glPFont) {
187:                        chars = sChars.toCharArray();
188:                        LinuxNativeFont.drawStringNative(xg2d.xftDraw, display,
189:                                colormap, font, xOffset, yOffset, chars, sChars
190:                                        .length(), xcolorPtr);
191:
192:                        xOffset += offs;
193:                        offs = 0;
194:                        sChars = String.valueOf(gl.getChar());
195:                        font = glPFont;
196:                    } else {
197:                        sChars += String.valueOf(gl.getChar());
198:                    }
199:                    offs += glWidth;
200:                }
201:                chars = sChars.toCharArray();
202:                if (chars.length != 0) {
203:                    LinuxNativeFont.drawStringNative(xg2d.xftDraw, display,
204:                            colormap, font, xOffset, yOffset, chars, sChars
205:                                    .length(), xcolorPtr);
206:                }
207:                xcolor.unlock();
208:
209:            }
210:
211:            public void drawGlyphVector(Graphics2D ga, GlyphVector gv, float x,
212:                    float y) {
213:                CommonGraphics2D g = (CommonGraphics2D) ga;
214:                AffineTransform trans = g.getTransform();
215:                float xOffset = x + (float) trans.getTranslateX();
216:                float yOffset = y + (float) trans.getTranslateY();
217:
218:                FontPeerImpl fnt = (FontPeerImpl) gv.getFont().getPeer();
219:                if (fnt.getClass() == CompositeFont.class) {
220:                    drawCompositeGlyphVector(g, gv, xOffset, yOffset);
221:                } else {
222:                    drawNormalGlyphVector(g, gv, xOffset, yOffset);
223:                }
224:
225:            }
226:
227:            /**
228:             * Method to draw GlyphVector created from physical font onto a 
229:             * specified graphics at desired coordinates.
230:             * 
231:             * @param g CommonGraphics2D to draw onto
232:             * @param glyphVector GlyphVector to draw
233:             * @param x starting X coordinate to draw at
234:             * @param y starting Y coordinate to draw at
235:             */
236:            public void drawNormalGlyphVector(CommonGraphics2D g,
237:                    GlyphVector glyphVector, float x, float y) {
238:
239:                XGraphics2D xg2d = (XGraphics2D) g;
240:
241:                long display = xg2d.display;
242:                int screen = xg2d.xConfig.dev.screen;
243:                long colormap = x11.XDefaultColormap(display, screen);
244:
245:                LinuxFont peer = (LinuxFont) glyphVector.getFont().getPeer();
246:
247:                X11.XColor xcolor = getXColor(g.getColor());
248:                long xcolorPtr = xcolor.lock();
249:
250:                for (int i = 0; i < glyphVector.getNumGlyphs(); i++) {
251:
252:                    Glyph gl = ((CommonGlyphVector) glyphVector).vector[i];
253:                    if (gl.getPointWidth() == 0) {
254:                        continue;
255:                    }
256:
257:                    Point2D pos = glyphVector.getGlyphPosition(i);
258:
259:                    int xBaseLine = (int) Math.round(x + pos.getX());
260:                    int yBaseLine = (int) Math.round(y + pos.getY());
261:                    char chars[] = { gl.getChar() };
262:
263:                    LinuxNativeFont.drawStringNative(xg2d.xftDraw, display,
264:                            colormap, peer
265:                                    .getFontHandle(isAntialiasingHintSet(g)),
266:                            xBaseLine, yBaseLine, chars, 1, xcolorPtr);
267:                }
268:                xcolor.unlock();
269:
270:            }
271:
272:            /**
273:             * Method to draw GlyphVector created from composite font onto a 
274:             * specified graphics at desired coordinates.
275:             * 
276:             * @param g CommonGraphics2D to draw onto
277:             * @param glyphVector GlyphVector to draw
278:             * @param x starting X coordinate to draw at
279:             * @param y starting Y coordinate to draw at
280:             */
281:            public void drawCompositeGlyphVector(CommonGraphics2D g,
282:                    GlyphVector glyphVector, float x, float y) {
283:
284:                XGraphics2D xg2d = (XGraphics2D) g;
285:                long display = xg2d.display;
286:                int screen = xg2d.xConfig.dev.screen;
287:                long colormap = x11.XDefaultColormap(display, screen);
288:
289:                X11.XColor xcolor = getXColor(g.getColor());
290:                long xcolorPtr = xcolor.lock();
291:
292:                for (int i = 0; i < glyphVector.getNumGlyphs(); i++) {
293:
294:                    Glyph gl = ((CommonGlyphVector) glyphVector).vector[i];
295:                    if (gl.getPointWidth() == 0) {
296:                        continue;
297:                    }
298:
299:                    Point2D pos = glyphVector.getGlyphPosition(i);
300:
301:                    int xBaseLine = (int) Math.round(x + pos.getX());
302:                    int yBaseLine = (int) Math.round(y + pos.getY());
303:                    char chars[] = { gl.getChar() };
304:
305:                    LinuxNativeFont.drawStringNative(xg2d.xftDraw, display,
306:                            colormap, gl.getPFont(), xBaseLine, yBaseLine,
307:                            chars, 1, xcolorPtr);
308:                }
309:                xcolor.unlock();
310:
311:            }
312:        }
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