| /* |
| * Copyright (C) 2018 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.graphics.fonts; |
| |
| import com.android.ide.common.rendering.api.LayoutLog; |
| import com.android.layoutlib.bridge.Bridge; |
| import com.android.layoutlib.bridge.impl.DelegateManager; |
| import com.android.tools.layoutlib.annotations.LayoutlibDelegate; |
| |
| import android.annotation.NonNull; |
| import android.content.res.AssetManager; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.channels.Channels; |
| import java.nio.channels.ReadableByteChannel; |
| |
| import libcore.util.NativeAllocationRegistry_Delegate; |
| |
| /** |
| * Delegate implementing the native methods of android.graphics.fonts.Font$Builder |
| * <p> |
| * Through the layoutlib_create tool, the original native methods of Font$Builder have been |
| * replaced by calls to methods of the same name in this delegate class. |
| * <p> |
| * This class behaves like the original native implementation, but in Java, keeping previously |
| * native data into its own objects and mapping them to int that are sent back and forth between it |
| * and the original Font$Builder class. |
| * |
| * @see DelegateManager |
| */ |
| public class Font_Builder_Delegate { |
| protected static final DelegateManager<Font_Builder_Delegate> sBuilderManager = |
| new DelegateManager<>(Font_Builder_Delegate.class); |
| private static long sFontFinalizer = -1; |
| |
| protected ByteBuffer mBuffer; |
| protected int mWeight; |
| protected boolean mItalic; |
| protected int mTtcIndex; |
| protected String filePath; |
| |
| @LayoutlibDelegate |
| /*package*/ static long nInitBuilder() { |
| return sBuilderManager.addNewDelegate(new Font_Builder_Delegate()); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static ByteBuffer createBuffer(@NonNull AssetManager am, @NonNull String path, |
| boolean isAsset, int cookie) throws IOException { |
| try (InputStream assetStream = isAsset ? am.open(path, AssetManager.ACCESS_BUFFER) |
| : am.openNonAsset(cookie, path, AssetManager.ACCESS_BUFFER)) { |
| |
| int capacity = assetStream.available(); |
| ByteBuffer buffer = ByteBuffer.allocateDirect(capacity); |
| buffer.order(ByteOrder.nativeOrder()); |
| ReadableByteChannel channel = Channels.newChannel(assetStream); |
| channel.read(buffer); |
| |
| if (assetStream.read() != -1) { |
| throw new IOException("Unable to access full contents of " + path); |
| } |
| |
| return buffer; |
| } |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nAddAxis(long builderPtr, int tag, float value) { |
| Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED, |
| "Font$Builder.nAddAxis is not supported.", null, null, null); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static long nBuild(long builderPtr, ByteBuffer buffer, String filePath, int weight, |
| boolean italic, int ttcIndex) { |
| Font_Builder_Delegate font = sBuilderManager.getDelegate(builderPtr); |
| if (font != null) { |
| font.mBuffer = buffer; |
| font.mWeight = weight; |
| font.mItalic = italic; |
| font.mTtcIndex = ttcIndex; |
| font.filePath = filePath; |
| } |
| return builderPtr; |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static long nGetReleaseNativeFont() { |
| synchronized (Font_Builder_Delegate.class) { |
| if (sFontFinalizer == -1) { |
| sFontFinalizer = NativeAllocationRegistry_Delegate.createFinalizer( |
| sBuilderManager::removeJavaReferenceFor); |
| } |
| } |
| return sFontFinalizer; |
| } |
| } |