/* * Copyright (C) 2008-2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.renderscript; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.Map; import android.os.Environment; import android.content.res.AssetManager; import android.content.res.Resources; import android.util.Log; import android.util.TypedValue; /** * @hide * @deprecated in API 16 *

This class gives users a simple way to draw hardware accelerated text. * Internally, the glyphs are rendered using the Freetype library and an internal cache of * rendered glyph bitmaps is maintained. Each font object represents a combination of a typeface, * and point size. You can create multiple font objects to represent styles such as bold or italic text, * faces, and different font sizes. During creation, the Android system quieries device's screen DPI to * ensure proper sizing across multiple device configurations.

*

Fonts are rendered using screen-space positions and no state setup beyond binding a * font to the Renderscript is required. A note of caution on performance, though the state changes * are transparent to the user, they do happen internally, and it is more efficient to * render large batches of text in sequence. It is also more efficient to render multiple * characters at once instead of one by one to improve draw call batching.

*

Font color and transparency are not part of the font object and you can freely modify * them in the script to suit the user's rendering needs. Font colors work as a state machine. * Every new call to draw text uses the last color set in the script.

**/ public class Font extends BaseObj { //These help us create a font by family name private static final String[] sSansNames = { "sans-serif", "arial", "helvetica", "tahoma", "verdana" }; private static final String[] sSerifNames = { "serif", "times", "times new roman", "palatino", "georgia", "baskerville", "goudy", "fantasy", "cursive", "ITC Stone Serif" }; private static final String[] sMonoNames = { "monospace", "courier", "courier new", "monaco" }; private static class FontFamily { String[] mNames; String mNormalFileName; String mBoldFileName; String mItalicFileName; String mBoldItalicFileName; } private static Map sFontFamilyMap; /** * @deprecated in API 16 */ public enum Style { /** * @deprecated in API 16 */ NORMAL, /** * @deprecated in API 16 */ BOLD, /** * @deprecated in API 16 */ ITALIC, /** * @deprecated in API 16 */ BOLD_ITALIC; } private static void addFamilyToMap(FontFamily family) { for(int i = 0; i < family.mNames.length; i ++) { sFontFamilyMap.put(family.mNames[i], family); } } private static void initFontFamilyMap() { sFontFamilyMap = new HashMap(); FontFamily sansFamily = new FontFamily(); sansFamily.mNames = sSansNames; sansFamily.mNormalFileName = "Roboto-Regular.ttf"; sansFamily.mBoldFileName = "Roboto-Bold.ttf"; sansFamily.mItalicFileName = "Roboto-Italic.ttf"; sansFamily.mBoldItalicFileName = "Roboto-BoldItalic.ttf"; addFamilyToMap(sansFamily); FontFamily serifFamily = new FontFamily(); serifFamily.mNames = sSerifNames; serifFamily.mNormalFileName = "DroidSerif-Regular.ttf"; serifFamily.mBoldFileName = "DroidSerif-Bold.ttf"; serifFamily.mItalicFileName = "DroidSerif-Italic.ttf"; serifFamily.mBoldItalicFileName = "DroidSerif-BoldItalic.ttf"; addFamilyToMap(serifFamily); FontFamily monoFamily = new FontFamily(); monoFamily.mNames = sMonoNames; monoFamily.mNormalFileName = "DroidSansMono.ttf"; monoFamily.mBoldFileName = "DroidSansMono.ttf"; monoFamily.mItalicFileName = "DroidSansMono.ttf"; monoFamily.mBoldItalicFileName = "DroidSansMono.ttf"; addFamilyToMap(monoFamily); } static { initFontFamilyMap(); } static String getFontFileName(String familyName, Style style) { FontFamily family = sFontFamilyMap.get(familyName); if(family != null) { switch(style) { case NORMAL: return family.mNormalFileName; case BOLD: return family.mBoldFileName; case ITALIC: return family.mItalicFileName; case BOLD_ITALIC: return family.mBoldItalicFileName; } } // Fallback if we could not find the desired family return "DroidSans.ttf"; } Font(int id, RenderScript rs) { super(id, rs); } /** * @deprecated in API 16 * Takes a specific file name as an argument */ static public Font createFromFile(RenderScript rs, Resources res, String path, float pointSize) { rs.validate(); int dpi = res.getDisplayMetrics().densityDpi; int fontId = rs.nFontCreateFromFile(path, pointSize, dpi); if(fontId == 0) { throw new RSRuntimeException("Unable to create font from file " + path); } Font rsFont = new Font(fontId, rs); return rsFont; } /** * @deprecated in API 16 */ static public Font createFromFile(RenderScript rs, Resources res, File path, float pointSize) { return createFromFile(rs, res, path.getAbsolutePath(), pointSize); } /** * @deprecated in API 16 */ static public Font createFromAsset(RenderScript rs, Resources res, String path, float pointSize) { rs.validate(); AssetManager mgr = res.getAssets(); int dpi = res.getDisplayMetrics().densityDpi; int fontId = rs.nFontCreateFromAsset(mgr, path, pointSize, dpi); if(fontId == 0) { throw new RSRuntimeException("Unable to create font from asset " + path); } Font rsFont = new Font(fontId, rs); return rsFont; } /** * @deprecated in API 16 */ static public Font createFromResource(RenderScript rs, Resources res, int id, float pointSize) { String name = "R." + Integer.toString(id); rs.validate(); InputStream is = null; try { is = res.openRawResource(id); } catch (Exception e) { throw new RSRuntimeException("Unable to open resource " + id); } int dpi = res.getDisplayMetrics().densityDpi; int fontId = 0; if (is instanceof AssetManager.AssetInputStream) { int asset = ((AssetManager.AssetInputStream) is).getAssetInt(); fontId = rs.nFontCreateFromAssetStream(name, pointSize, dpi, asset); } else { throw new RSRuntimeException("Unsupported asset stream created"); } if(fontId == 0) { throw new RSRuntimeException("Unable to create font from resource " + id); } Font rsFont = new Font(fontId, rs); return rsFont; } /** * @deprecated in API 16 * Accepts one of the following family names as an argument * and will attempt to produce the best match with a system font: * * "sans-serif" "arial" "helvetica" "tahoma" "verdana" * "serif" "times" "times new roman" "palatino" "georgia" "baskerville" * "goudy" "fantasy" "cursive" "ITC Stone Serif" * "monospace" "courier" "courier new" "monaco" * * Returns default font if no match could be found. */ static public Font create(RenderScript rs, Resources res, String familyName, Style fontStyle, float pointSize) { String fileName = getFontFileName(familyName, fontStyle); String fontPath = Environment.getRootDirectory().getAbsolutePath(); fontPath += "/fonts/" + fileName; return createFromFile(rs, res, fontPath, pointSize); } }