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.InputStream; 21 import java.util.HashMap; 22 import java.util.Map; 23 24 import android.os.Environment; 25 26 import android.content.res.AssetManager; 27 import android.content.res.Resources; 28 29 /** 30 * @hide 31 * @deprecated in API 16 32 * <p>This class gives users a simple way to draw hardware accelerated text. 33 * Internally, the glyphs are rendered using the Freetype library and an internal cache of 34 * rendered glyph bitmaps is maintained. Each font object represents a combination of a typeface, 35 * and point size. You can create multiple font objects to represent styles such as bold or italic text, 36 * faces, and different font sizes. During creation, the Android system quieries device's screen DPI to 37 * ensure proper sizing across multiple device configurations.</p> 38 * <p>Fonts are rendered using screen-space positions and no state setup beyond binding a 39 * font to the RenderScript is required. A note of caution on performance, though the state changes 40 * are transparent to the user, they do happen internally, and it is more efficient to 41 * render large batches of text in sequence. It is also more efficient to render multiple 42 * characters at once instead of one by one to improve draw call batching.</p> 43 * <p>Font color and transparency are not part of the font object and you can freely modify 44 * them in the script to suit the user's rendering needs. Font colors work as a state machine. 45 * Every new call to draw text uses the last color set in the script.</p> 46 **/ 47 public class Font extends BaseObj { 48 49 //These help us create a font by family name 50 private static final String[] sSansNames = { 51 "sans-serif", "arial", "helvetica", "tahoma", "verdana" 52 }; 53 54 private static final String[] sSerifNames = { 55 "serif", "times", "times new roman", "palatino", "georgia", "baskerville", 56 "goudy", "fantasy", "cursive", "ITC Stone Serif" 57 }; 58 59 private static final String[] sMonoNames = { 60 "monospace", "courier", "courier new", "monaco" 61 }; 62 63 private static class FontFamily { 64 String[] mNames; 65 String mNormalFileName; 66 String mBoldFileName; 67 String mItalicFileName; 68 String mBoldItalicFileName; 69 } 70 71 private static Map<String, FontFamily> sFontFamilyMap; 72 73 /** 74 * @deprecated in API 16 75 */ 76 public enum Style { 77 /** 78 * @deprecated in API 16 79 */ 80 NORMAL, 81 /** 82 * @deprecated in API 16 83 */ 84 BOLD, 85 /** 86 * @deprecated in API 16 87 */ 88 ITALIC, 89 /** 90 * @deprecated in API 16 91 */ 92 BOLD_ITALIC; 93 } 94 95 private static void addFamilyToMap(FontFamily family) { 96 for(int i = 0; i < family.mNames.length; i ++) { 97 sFontFamilyMap.put(family.mNames[i], family); 98 } 99 } 100 101 private static void initFontFamilyMap() { 102 sFontFamilyMap = new HashMap<String, FontFamily>(); 103 104 FontFamily sansFamily = new FontFamily(); 105 sansFamily.mNames = sSansNames; 106 sansFamily.mNormalFileName = "Roboto-Regular.ttf"; 107 sansFamily.mBoldFileName = "Roboto-Bold.ttf"; 108 sansFamily.mItalicFileName = "Roboto-Italic.ttf"; 109 sansFamily.mBoldItalicFileName = "Roboto-BoldItalic.ttf"; 110 addFamilyToMap(sansFamily); 111 112 FontFamily serifFamily = new FontFamily(); 113 serifFamily.mNames = sSerifNames; 114 serifFamily.mNormalFileName = "NotoSerif-Regular.ttf"; 115 serifFamily.mBoldFileName = "NotoSerif-Bold.ttf"; 116 serifFamily.mItalicFileName = "NotoSerif-Italic.ttf"; 117 serifFamily.mBoldItalicFileName = "NotoSerif-BoldItalic.ttf"; 118 addFamilyToMap(serifFamily); 119 120 FontFamily monoFamily = new FontFamily(); 121 monoFamily.mNames = sMonoNames; 122 monoFamily.mNormalFileName = "DroidSansMono.ttf"; 123 monoFamily.mBoldFileName = "DroidSansMono.ttf"; 124 monoFamily.mItalicFileName = "DroidSansMono.ttf"; 125 monoFamily.mBoldItalicFileName = "DroidSansMono.ttf"; 126 addFamilyToMap(monoFamily); 127 } 128 129 static { 130 initFontFamilyMap(); 131 } 132 133 static String getFontFileName(String familyName, Style style) { 134 FontFamily family = sFontFamilyMap.get(familyName); 135 if(family != null) { 136 switch(style) { 137 case NORMAL: 138 return family.mNormalFileName; 139 case BOLD: 140 return family.mBoldFileName; 141 case ITALIC: 142 return family.mItalicFileName; 143 case BOLD_ITALIC: 144 return family.mBoldItalicFileName; 145 } 146 } 147 // Fallback if we could not find the desired family 148 return "DroidSans.ttf"; 149 } 150 151 Font(long id, RenderScript rs) { 152 super(id, rs); 153 } 154 155 /** 156 * @deprecated in API 16 157 * Takes a specific file name as an argument 158 */ 159 static public Font createFromFile(RenderScript rs, Resources res, String path, float pointSize) { 160 rs.validate(); 161 int dpi = res.getDisplayMetrics().densityDpi; 162 long fontId = rs.nFontCreateFromFile(path, pointSize, dpi); 163 164 if(fontId == 0) { 165 throw new RSRuntimeException("Unable to create font from file " + path); 166 } 167 Font rsFont = new Font(fontId, rs); 168 169 return rsFont; 170 } 171 172 /** 173 * @deprecated in API 16 174 */ 175 static public Font createFromFile(RenderScript rs, Resources res, File path, float pointSize) { 176 return createFromFile(rs, res, path.getAbsolutePath(), pointSize); 177 } 178 179 /** 180 * @deprecated in API 16 181 */ 182 static public Font createFromAsset(RenderScript rs, Resources res, String path, float pointSize) { 183 rs.validate(); 184 AssetManager mgr = res.getAssets(); 185 int dpi = res.getDisplayMetrics().densityDpi; 186 187 long fontId = rs.nFontCreateFromAsset(mgr, path, pointSize, dpi); 188 if(fontId == 0) { 189 throw new RSRuntimeException("Unable to create font from asset " + path); 190 } 191 Font rsFont = new Font(fontId, rs); 192 return rsFont; 193 } 194 195 /** 196 * @deprecated in API 16 197 */ 198 static public Font createFromResource(RenderScript rs, Resources res, int id, float pointSize) { 199 String name = "R." + Integer.toString(id); 200 201 rs.validate(); 202 InputStream is = null; 203 try { 204 is = res.openRawResource(id); 205 } catch (Exception e) { 206 throw new RSRuntimeException("Unable to open resource " + id); 207 } 208 209 int dpi = res.getDisplayMetrics().densityDpi; 210 211 long fontId = 0; 212 if (is instanceof AssetManager.AssetInputStream) { 213 long asset = ((AssetManager.AssetInputStream) is).getNativeAsset(); 214 fontId = rs.nFontCreateFromAssetStream(name, pointSize, dpi, asset); 215 } else { 216 throw new RSRuntimeException("Unsupported asset stream created"); 217 } 218 219 if(fontId == 0) { 220 throw new RSRuntimeException("Unable to create font from resource " + id); 221 } 222 Font rsFont = new Font(fontId, rs); 223 return rsFont; 224 } 225 226 /** 227 * @deprecated in API 16 228 * Accepts one of the following family names as an argument 229 * and will attempt to produce the best match with a system font: 230 * 231 * "sans-serif" "arial" "helvetica" "tahoma" "verdana" 232 * "serif" "times" "times new roman" "palatino" "georgia" "baskerville" 233 * "goudy" "fantasy" "cursive" "ITC Stone Serif" 234 * "monospace" "courier" "courier new" "monaco" 235 * 236 * Returns default font if no match could be found. 237 */ 238 static public Font create(RenderScript rs, Resources res, String familyName, Style fontStyle, float pointSize) { 239 String fileName = getFontFileName(familyName, fontStyle); 240 String fontPath = Environment.getRootDirectory().getAbsolutePath(); 241 fontPath += "/fonts/" + fileName; 242 return createFromFile(rs, res, fontPath, pointSize); 243 } 244 245 } 246
