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 * @hide 34 * @deprecated in API 16 35 * <p>This class gives users a simple way to draw hardware accelerated text. 36 * Internally, the glyphs are rendered using the Freetype library and an internal cache of 37 * rendered glyph bitmaps is maintained. Each font object represents a combination of a typeface, 38 * and point size. You can create multiple font objects to represent styles such as bold or italic text, 39 * faces, and different font sizes. During creation, the Android system quieries device's screen DPI to 40 * ensure proper sizing across multiple device configurations.</p> 41 * <p>Fonts are rendered using screen-space positions and no state setup beyond binding a 42 * font to the RenderScript is required. A note of caution on performance, though the state changes 43 * are transparent to the user, they do happen internally, and it is more efficient to 44 * render large batches of text in sequence. It is also more efficient to render multiple 45 * characters at once instead of one by one to improve draw call batching.</p> 46 * <p>Font color and transparency are not part of the font object and you can freely modify 47 * them in the script to suit the user's rendering needs. Font colors work as a state machine. 48 * Every new call to draw text uses the last color set in the script.</p> 49 **/ 50 public class Font extends BaseObj { 51 52 //These help us create a font by family name 53 private static final String[] sSansNames = { 54 "sans-serif", "arial", "helvetica", "tahoma", "verdana" 55 }; 56 57 private static final String[] sSerifNames = { 58 "serif", "times", "times new roman", "palatino", "georgia", "baskerville", 59 "goudy", "fantasy", "cursive", "ITC Stone Serif" 60 }; 61 62 private static final String[] sMonoNames = { 63 "monospace", "courier", "courier new", "monaco" 64 }; 65 66 private static class FontFamily { 67 String[] mNames; 68 String mNormalFileName; 69 String mBoldFileName; 70 String mItalicFileName; 71 String mBoldItalicFileName; 72 } 73 74 private static Map<String, FontFamily> sFontFamilyMap; 75 76 /** 77 * @deprecated in API 16 78 */ 79 public enum Style { 80 /** 81 * @deprecated in API 16 82 */ 83 NORMAL, 84 /** 85 * @deprecated in API 16 86 */ 87 BOLD, 88 /** 89 * @deprecated in API 16 90 */ 91 ITALIC, 92 /** 93 * @deprecated in API 16 94 */ 95 BOLD_ITALIC; 96 } 97 98 private static void addFamilyToMap(FontFamily family) { 99 for(int i = 0; i < family.mNames.length; i ++) { 100 sFontFamilyMap.put(family.mNames[i], family); 101 } 102 } 103 104 private static void initFontFamilyMap() { 105 sFontFamilyMap = new HashMap<String, FontFamily>(); 106 107 FontFamily sansFamily = new FontFamily(); 108 sansFamily.mNames = sSansNames; 109 sansFamily.mNormalFileName = "Roboto-Regular.ttf"; 110 sansFamily.mBoldFileName = "Roboto-Bold.ttf"; 111 sansFamily.mItalicFileName = "Roboto-Italic.ttf"; 112 sansFamily.mBoldItalicFileName = "Roboto-BoldItalic.ttf"; 113 addFamilyToMap(sansFamily); 114 115 FontFamily serifFamily = new FontFamily(); 116 serifFamily.mNames = sSerifNames; 117 serifFamily.mNormalFileName = "DroidSerif-Regular.ttf"; 118 serifFamily.mBoldFileName = "DroidSerif-Bold.ttf"; 119 serifFamily.mItalicFileName = "DroidSerif-Italic.ttf"; 120 serifFamily.mBoldItalicFileName = "DroidSerif-BoldItalic.ttf"; 121 addFamilyToMap(serifFamily); 122 123 FontFamily monoFamily = new FontFamily(); 124 monoFamily.mNames = sMonoNames; 125 monoFamily.mNormalFileName = "DroidSansMono.ttf"; 126 monoFamily.mBoldFileName = "DroidSansMono.ttf"; 127 monoFamily.mItalicFileName = "DroidSansMono.ttf"; 128 monoFamily.mBoldItalicFileName = "DroidSansMono.ttf"; 129 addFamilyToMap(monoFamily); 130 } 131 132 static { 133 initFontFamilyMap(); 134 } 135 136 static String getFontFileName(String familyName, Style style) { 137 FontFamily family = sFontFamilyMap.get(familyName); 138 if(family != null) { 139 switch(style) { 140 case NORMAL: 141 return family.mNormalFileName; 142 case BOLD: 143 return family.mBoldFileName; 144 case ITALIC: 145 return family.mItalicFileName; 146 case BOLD_ITALIC: 147 return family.mBoldItalicFileName; 148 } 149 } 150 // Fallback if we could not find the desired family 151 return "DroidSans.ttf"; 152 } 153 154 Font(int id, RenderScript rs) { 155 super(id, rs); 156 } 157 158 /** 159 * @deprecated in API 16 160 * Takes a specific file name as an argument 161 */ 162 static public Font createFromFile(RenderScript rs, Resources res, String path, float pointSize) { 163 rs.validate(); 164 int dpi = res.getDisplayMetrics().densityDpi; 165 int fontId = rs.nFontCreateFromFile(path, pointSize, dpi); 166 167 if(fontId == 0) { 168 throw new RSRuntimeException("Unable to create font from file " + path); 169 } 170 Font rsFont = new Font(fontId, rs); 171 172 return rsFont; 173 } 174 175 /** 176 * @deprecated in API 16 177 */ 178 static public Font createFromFile(RenderScript rs, Resources res, File path, float pointSize) { 179 return createFromFile(rs, res, path.getAbsolutePath(), pointSize); 180 } 181 182 /** 183 * @deprecated in API 16 184 */ 185 static public Font createFromAsset(RenderScript rs, Resources res, String path, float pointSize) { 186 rs.validate(); 187 AssetManager mgr = res.getAssets(); 188 int dpi = res.getDisplayMetrics().densityDpi; 189 190 int fontId = rs.nFontCreateFromAsset(mgr, path, pointSize, dpi); 191 if(fontId == 0) { 192 throw new RSRuntimeException("Unable to create font from asset " + path); 193 } 194 Font rsFont = new Font(fontId, rs); 195 return rsFont; 196 } 197 198 /** 199 * @deprecated in API 16 200 */ 201 static public Font createFromResource(RenderScript rs, Resources res, int id, float pointSize) { 202 String name = "R." + Integer.toString(id); 203 204 rs.validate(); 205 InputStream is = null; 206 try { 207 is = res.openRawResource(id); 208 } catch (Exception e) { 209 throw new RSRuntimeException("Unable to open resource " + id); 210 } 211 212 int dpi = res.getDisplayMetrics().densityDpi; 213 214 int fontId = 0; 215 if (is instanceof AssetManager.AssetInputStream) { 216 int asset = ((AssetManager.AssetInputStream) is).getAssetInt(); 217 fontId = rs.nFontCreateFromAssetStream(name, pointSize, dpi, asset); 218 } else { 219 throw new RSRuntimeException("Unsupported asset stream created"); 220 } 221 222 if(fontId == 0) { 223 throw new RSRuntimeException("Unable to create font from resource " + id); 224 } 225 Font rsFont = new Font(fontId, rs); 226 return rsFont; 227 } 228 229 /** 230 * @deprecated in API 16 231 * Accepts one of the following family names as an argument 232 * and will attempt to produce the best match with a system font: 233 * 234 * "sans-serif" "arial" "helvetica" "tahoma" "verdana" 235 * "serif" "times" "times new roman" "palatino" "georgia" "baskerville" 236 * "goudy" "fantasy" "cursive" "ITC Stone Serif" 237 * "monospace" "courier" "courier new" "monaco" 238 * 239 * Returns default font if no match could be found. 240 */ 241 static public Font create(RenderScript rs, Resources res, String familyName, Style fontStyle, float pointSize) { 242 String fileName = getFontFileName(familyName, fontStyle); 243 String fontPath = Environment.getRootDirectory().getAbsolutePath(); 244 fontPath += "/fonts/" + fileName; 245 return createFromFile(rs, res, fontPath, pointSize); 246 } 247 248 } 249
