1 /* 2 * Copyright (C) 2008-2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.renderscript; 18 19 import java.io.File; 20 import java.io.IOException; 21 import java.io.InputStream; 22 import java.util.HashMap; 23 import java.util.Map; 24 25 import android.os.Environment; 26 27 import android.content.res.AssetManager; 28 import android.content.res.Resources; 29 import android.util.Log; 30 import android.util.TypedValue; 31 32 /** 33 * @deprecated in API 16 34 * <p>This class gives users a simple way to draw hardware accelerated text. 35 * Internally, the glyphs are rendered using the Freetype library and an internal cache of 36 * rendered glyph bitmaps is maintained. Each font object represents a combination of a typeface, 37 * and point size. You can create multiple font objects to represent styles such as bold or italic text, 38 * faces, and different font sizes. During creation, the Android system quieries device's screen DPI to 39 * ensure proper sizing across multiple device configurations.</p> 40 * <p>Fonts are rendered using screen-space positions and no state setup beyond binding a 41 * font to the Renderscript is required. A note of caution on performance, though the state changes 42 * are transparent to the user, they do happen internally, and it is more efficient to 43 * render large batches of text in sequence. It is also more efficient to render multiple 44 * characters at once instead of one by one to improve draw call batching.</p> 45 * <p>Font color and transparency are not part of the font object and you can freely modify 46 * them in the script to suit the user's rendering needs. Font colors work as a state machine. 47 * Every new call to draw text uses the last color set in the script.</p> 48 **/ 49 public class Font extends BaseObj { 50 51 //These help us create a font by family name 52 private static final String[] sSansNames = { 53 "sans-serif", "arial", "helvetica", "tahoma", "verdana" 54 }; 55 56 private static final String[] sSerifNames = { 57 "serif", "times", "times new roman", "palatino", "georgia", "baskerville", 58 "goudy", "fantasy", "cursive", "ITC Stone Serif" 59 }; 60 61 private static final String[] sMonoNames = { 62 "monospace", "courier", "courier new", "monaco" 63 }; 64 65 private static class FontFamily { 66 String[] mNames; 67 String mNormalFileName; 68 String mBoldFileName; 69 String mItalicFileName; 70 String mBoldItalicFileName; 71 } 72 73 private static Map<String, FontFamily> sFontFamilyMap; 74 75 /** 76 * @deprecated in API 16 77 */ 78 public enum Style { 79 /** 80 * @deprecated in API 16 81 */ 82 NORMAL, 83 /** 84 * @deprecated in API 16 85 */ 86 BOLD, 87 /** 88 * @deprecated in API 16 89 */ 90 ITALIC, 91 /** 92 * @deprecated in API 16 93 */ 94 BOLD_ITALIC; 95 } 96 97 private static void addFamilyToMap(FontFamily family) { 98 for(int i = 0; i < family.mNames.length; i ++) { 99 sFontFamilyMap.put(family.mNames[i], family); 100 } 101 } 102 103 private static void initFontFamilyMap() { 104 sFontFamilyMap = new HashMap<String, FontFamily>(); 105 106 FontFamily sansFamily = new FontFamily(); 107 sansFamily.mNames = sSansNames; 108 sansFamily.mNormalFileName = "Roboto-Regular.ttf"; 109 sansFamily.mBoldFileName = "Roboto-Bold.ttf"; 110 sansFamily.mItalicFileName = "Roboto-Italic.ttf"; 111 sansFamily.mBoldItalicFileName = "Roboto-BoldItalic.ttf"; 112 addFamilyToMap(sansFamily); 113 114 FontFamily serifFamily = new FontFamily(); 115 serifFamily.mNames = sSerifNames; 116 serifFamily.mNormalFileName = "DroidSerif-Regular.ttf"; 117 serifFamily.mBoldFileName = "DroidSerif-Bold.ttf"; 118 serifFamily.mItalicFileName = "DroidSerif-Italic.ttf"; 119 serifFamily.mBoldItalicFileName = "DroidSerif-BoldItalic.ttf"; 120 addFamilyToMap(serifFamily); 121 122 FontFamily monoFamily = new FontFamily(); 123 monoFamily.mNames = sMonoNames; 124 monoFamily.mNormalFileName = "DroidSansMono.ttf"; 125 monoFamily.mBoldFileName = "DroidSansMono.ttf"; 126 monoFamily.mItalicFileName = "DroidSansMono.ttf"; 127 monoFamily.mBoldItalicFileName = "DroidSansMono.ttf"; 128 addFamilyToMap(monoFamily); 129 } 130 131 static { 132 initFontFamilyMap(); 133 } 134 135 static String getFontFileName(String familyName, Style style) { 136 FontFamily family = sFontFamilyMap.get(familyName); 137 if(family != null) { 138 switch(style) { 139 case NORMAL: 140 return family.mNormalFileName; 141 case BOLD: 142 return family.mBoldFileName; 143 case ITALIC: 144 return family.mItalicFileName; 145 case BOLD_ITALIC: 146 return family.mBoldItalicFileName; 147 } 148 } 149 // Fallback if we could not find the desired family 150 return "DroidSans.ttf"; 151 } 152 153 Font(int id, RenderScript rs) { 154 super(id, rs); 155 } 156 157 /** 158 * @deprecated in API 16 159 * Takes a specific file name as an argument 160 */ 161 static public Font createFromFile(RenderScript rs, Resources res, String path, float pointSize) { 162 rs.validate(); 163 int dpi = res.getDisplayMetrics().densityDpi; 164 int fontId = rs.nFontCreateFromFile(path, pointSize, dpi); 165 166 if(fontId == 0) { 167 throw new RSRuntimeException("Unable to create font from file " + path); 168 } 169 Font rsFont = new Font(fontId, rs); 170 171 return rsFont; 172 } 173 174 /** 175 * @deprecated in API 16 176 */ 177 static public Font createFromFile(RenderScript rs, Resources res, File path, float pointSize) { 178 return createFromFile(rs, res, path.getAbsolutePath(), pointSize); 179 } 180 181 /** 182 * @deprecated in API 16 183 */ 184 static public Font createFromAsset(RenderScript rs, Resources res, String path, float pointSize) { 185 rs.validate(); 186 AssetManager mgr = res.getAssets(); 187 int dpi = res.getDisplayMetrics().densityDpi; 188 189 int fontId = rs.nFontCreateFromAsset(mgr, path, pointSize, dpi); 190 if(fontId == 0) { 191 throw new RSRuntimeException("Unable to create font from asset " + path); 192 } 193 Font rsFont = new Font(fontId, rs); 194 return rsFont; 195 } 196 197 /** 198 * @deprecated in API 16 199 */ 200 static public Font createFromResource(RenderScript rs, Resources res, int id, float pointSize) { 201 String name = "R." + Integer.toString(id); 202 203 rs.validate(); 204 InputStream is = null; 205 try { 206 is = res.openRawResource(id); 207 } catch (Exception e) { 208 throw new RSRuntimeException("Unable to open resource " + id); 209 } 210 211 int dpi = res.getDisplayMetrics().densityDpi; 212 213 int fontId = 0; 214 if (is instanceof AssetManager.AssetInputStream) { 215 int asset = ((AssetManager.AssetInputStream) is).getAssetInt(); 216 fontId = rs.nFontCreateFromAssetStream(name, pointSize, dpi, asset); 217 } else { 218 throw new RSRuntimeException("Unsupported asset stream created"); 219 } 220 221 if(fontId == 0) { 222 throw new RSRuntimeException("Unable to create font from resource " + id); 223 } 224 Font rsFont = new Font(fontId, rs); 225 return rsFont; 226 } 227 228 /** 229 * @deprecated in API 16 230 * Accepts one of the following family names as an argument 231 * and will attempt to produce the best match with a system font: 232 * 233 * "sans-serif" "arial" "helvetica" "tahoma" "verdana" 234 * "serif" "times" "times new roman" "palatino" "georgia" "baskerville" 235 * "goudy" "fantasy" "cursive" "ITC Stone Serif" 236 * "monospace" "courier" "courier new" "monaco" 237 * 238 * Returns default font if no match could be found. 239 */ 240 static public Font create(RenderScript rs, Resources res, String familyName, Style fontStyle, float pointSize) { 241 String fileName = getFontFileName(familyName, fontStyle); 242 String fontPath = Environment.getRootDirectory().getAbsolutePath(); 243 fontPath += "/fonts/" + fileName; 244 return createFromFile(rs, res, fontPath, pointSize); 245 } 246 247 } 248
