/*
* 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.InputStream;
import java.util.HashMap;
import java.util.Map;
import android.os.Environment;
import android.content.res.AssetManager;
import android.content.res.Resources;
/**
* @hide
* @deprecated in API 16
* <p>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.</p>
* <p>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.</p>
* <p>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.</p>
**/
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<String, FontFamily> 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<String, FontFamily>();
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 = "NotoSerif-Regular.ttf";
serifFamily.mBoldFileName = "NotoSerif-Bold.ttf";
serifFamily.mItalicFileName = "NotoSerif-Italic.ttf";
serifFamily.mBoldItalicFileName = "NotoSerif-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(long 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;
long 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;
long 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;
long fontId = 0;
if (is instanceof AssetManager.AssetInputStream) {
long asset = ((AssetManager.AssetInputStream) is).getNativeAsset();
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);
}
}
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