graphics/drawable/VectorDrawable.java

/*
 * Copyright (C) 2014 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.drawable;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.pm.ActivityInfo.Config;
import android.content.res.ColorStateList;
import android.content.res.ComplexColor;
import android.content.res.GradientColor;
import android.content.res.Resources;
import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Insets;
import android.graphics.PixelFormat;
import android.graphics.PorterDuffColorFilter;
import android.graphics.Rect;
import android.graphics.PorterDuff.Mode;
import android.graphics.Shader;
import android.util.ArrayMap;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.LayoutDirection;
import android.util.Log;
import android.util.PathParser;
import android.util.Xml;

import com.android.internal.R;
import com.android.internal.util.VirtualRefBasePtr;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Stack;

/**
 * This lets you create a drawable based on an XML vector graphic.
 * <p/>
 * <strong>Note:</strong> To optimize for the re-drawing performance, one bitmap cache is created
 * for each VectorDrawable. Therefore, referring to the same VectorDrawable means sharing the same
 * bitmap cache. If these references don't agree upon on the same size, the bitmap will be recreated
 * and redrawn every time size is changed. In other words, if a VectorDrawable is used for
 * different sizes, it is more efficient to create multiple VectorDrawables, one for each size.
 * <p/>
 * VectorDrawable can be defined in an XML file with the <code>&lt;vector></code> element.
 * <p/>
 * The vector drawable has the following elements:
 * <p/>
 * <dt><code>&lt;vector></code></dt>
 * <dl>
 * <dd>Used to define a vector drawable
 * <dl>
 * <dt><code>android:name</code></dt>
 * <dd>Defines the name of this vector drawable.</dd>
 * <dt><code>android:width</code></dt>
 * <dd>Used to define the intrinsic width of the drawable.
 * This support all the dimension units, normally specified with dp.</dd>
 * <dt><code>android:height</code></dt>
 * <dd>Used to define the intrinsic height the drawable.
 * This support all the dimension units, normally specified with dp.</dd>
 * <dt><code>android:viewportWidth</code></dt>
 * <dd>Used to define the width of the viewport space. Viewport is basically
 * the virtual canvas where the paths are drawn on.</dd>
 * <dt><code>android:viewportHeight</code></dt>
 * <dd>Used to define the height of the viewport space. Viewport is basically
 * the virtual canvas where the paths are drawn on.</dd>
 * <dt><code>android:tint</code></dt>
 * <dd>The color to apply to the drawable as a tint. By default, no tint is applied.</dd>
 * <dt><code>android:tintMode</code></dt>
 * <dd>The Porter-Duff blending mode for the tint color. The default value is src_in.</dd>
 * <dt><code>android:autoMirrored</code></dt>
 * <dd>Indicates if the drawable needs to be mirrored when its layout direction is
 * RTL (right-to-left).</dd>
 * <dt><code>android:alpha</code></dt>
 * <dd>The opacity of this drawable.</dd>
 * </dl></dd>
 * </dl>
 *
 * <dl>
 * <dt><code>&lt;group></code></dt>
 * <dd>Defines a group of paths or subgroups, plus transformation information.
 * The transformations are defined in the same coordinates as the viewport.
 * And the transformations are applied in the order of scale, rotate then translate.
 * <dl>
 * <dt><code>android:name</code></dt>
 * <dd>Defines the name of the group.</dd>
 * <dt><code>android:rotation</code></dt>
 * <dd>The degrees of rotation of the group.</dd>
 * <dt><code>android:pivotX</code></dt>
 * <dd>The X coordinate of the pivot for the scale and rotation of the group.
 * This is defined in the viewport space.</dd>
 * <dt><code>android:pivotY</code></dt>
 * <dd>The Y coordinate of the pivot for the scale and rotation of the group.
 * This is defined in the viewport space.</dd>
 * <dt><code>android:scaleX</code></dt>
 * <dd>The amount of scale on the X Coordinate.</dd>
 * <dt><code>android:scaleY</code></dt>
 * <dd>The amount of scale on the Y coordinate.</dd>
 * <dt><code>android:translateX</code></dt>
 * <dd>The amount of translation on the X coordinate.
 * This is defined in the viewport space.</dd>
 * <dt><code>android:translateY</code></dt>
 * <dd>The amount of translation on the Y coordinate.
 * This is defined in the viewport space.</dd>
 * </dl></dd>
 * </dl>
 *
 * <dl>
 * <dt><code>&lt;path></code></dt>
 * <dd>Defines paths to be drawn.
 * <dl>
 * <dt><code>android:name</code></dt>
 * <dd>Defines the name of the path.</dd>
 * <dt><code>android:pathData</code></dt>
 * <dd>Defines path data using exactly same format as "d" attribute
 * in the SVG's path data. This is defined in the viewport space.</dd>
 * <dt><code>android:fillColor</code></dt>
 * <dd>Specifies the color used to fill the path. May be a color, also may be a color state list or
 * a gradient color for SDK 24+. If this property is animated, any value set by the animation will
 * override the original value. No path fill is drawn if this property is not specified.</dd>
 * <dt><code>android:strokeColor</code></dt>
 * <dd>Specifies the color used to draw the path outline. May be a color or (SDK 24+ only) a color
 * state list. If this property is animated, any value set by the animation will override the
 * original value. No path outline is drawn if this property is not specified.</dd>
 * <dt><code>android:strokeWidth</code></dt>
 * <dd>The width a path stroke.</dd>
 * <dt><code>android:strokeAlpha</code></dt>
 * <dd>The opacity of a path stroke.</dd>
 * <dt><code>android:fillAlpha</code></dt>
 * <dd>The opacity to fill the path with.</dd>
 * <dt><code>android:trimPathStart</code></dt>
 * <dd>The fraction of the path to trim from the start, in the range from 0 to 1.</dd>
 * <dt><code>android:trimPathEnd</code></dt>
 * <dd>The fraction of the path to trim from the end, in the range from 0 to 1.</dd>
 * <dt><code>android:trimPathOffset</code></dt>
 * <dd>Shift trim region (allows showed region to include the start and end), in the range
 * from 0 to 1.</dd>
 * <dt><code>android:strokeLineCap</code></dt>
 * <dd>Sets the linecap for a stroked path: butt, round, square.</dd>
 * <dt><code>android:strokeLineJoin</code></dt>
 * <dd>Sets the lineJoin for a stroked path: miter,round,bevel.</dd>
 * <dt><code>android:strokeMiterLimit</code></dt>
 * <dd>Sets the Miter limit for a stroked path.</dd>
 * </dl></dd>
 * </dl>
 *
 * <dl>
 * <dt><code>&lt;clip-path></code></dt>
 * <dd>Defines path to be the current clip. Note that the clip path only apply to
 * the current group and its children.
 * <dl>
 * <dt><code>android:name</code></dt>
 * <dd>Defines the name of the clip path.</dd>
 * <dt><code>android:pathData</code></dt>
 * <dd>Defines clip path using the same format as "d" attribute
 * in the SVG's path data.</dd>
 * </dl></dd>
 * </dl>
 * <li>Here is a simple VectorDrawable in this vectordrawable.xml file.
 * <pre>
 * &lt;vector xmlns:android=&quot;http://schemas.android.com/apk/res/android";
 *     android:height=&quot;64dp&quot;
 *     android:width=&quot;64dp&quot;
 *     android:viewportHeight=&quot;600&quot;
 *     android:viewportWidth=&quot;600&quot; &gt;
 *     &lt;group
 *         android:name=&quot;rotationGroup&quot;
 *         android:pivotX=&quot;300.0&quot;
 *         android:pivotY=&quot;300.0&quot;
 *         android:rotation=&quot;45.0&quot; &gt;
 *         &lt;path
 *             android:name=&quot;v&quot;
 *             android:fillColor=&quot;#000000&quot;
 *             android:pathData=&quot;M300,70 l 0,-70 70,70 0,0 -70,70z&quot; /&gt;
 *     &lt;/group&gt;
 * &lt;/vector&gt;
 * </pre></li>
 */

public class VectorDrawable extends Drawable {
    private static final String LOGTAG = VectorDrawable.class.getSimpleName();

    private static final String SHAPE_CLIP_PATH = "clip-path";
    private static final String SHAPE_GROUP = "group";
    private static final String SHAPE_PATH = "path";
    private static final String SHAPE_VECTOR = "vector";

    private VectorDrawableState mVectorState;

    private PorterDuffColorFilter mTintFilter;
    private ColorFilter mColorFilter;

    private boolean mMutated;

    /** The density of the display on which this drawable will be rendered. */
    private int mTargetDensity;

    // Given the virtual display setup, the dpi can be different than the inflation's dpi.
    // Therefore, we need to scale the values we got from the getDimension*().
    private int mDpiScaledWidth = 0;
    private int mDpiScaledHeight = 0;
    private Insets mDpiScaledInsets = Insets.NONE;

    /** Whether DPI-scaled width, height, and insets need to be updated. */
    private boolean mDpiScaledDirty = true;

    // Temp variable, only for saving "new" operation at the draw() time.
    private final Rect mTmpBounds = new Rect();

    public VectorDrawable() {
        this(new VectorDrawableState(), null);
    }

    /**
     * The one constructor to rule them all. This is called by all public
     * constructors to set the state and initialize local properties.
     */
    private VectorDrawable(@NonNull VectorDrawableState state, @Nullable Resources res) {
        mVectorState = state;
        updateLocalState(res);
    }

    /**
     * Initializes local dynamic properties from state. This should be called
     * after significant state changes, e.g. from the One True Constructor and
     * after inflating or applying a theme.
     *
     * @param res resources of the context in which the drawable will be
     *            displayed, or {@code null} to use the constant state defaults
     */
    private void updateLocalState(Resources res) {
        final int density = Drawable.resolveDensity(res, mVectorState.mDensity);
        if (mTargetDensity != density) {
            mTargetDensity = density;
            mDpiScaledDirty = true;
        }

        mTintFilter = updateTintFilter(mTintFilter, mVectorState.mTint, mVectorState.mTintMode);
    }

    @Override
    public Drawable mutate() {
        if (!mMutated && super.mutate() == this) {
            mVectorState = new VectorDrawableState(mVectorState);
            mMutated = true;
        }
        return this;
    }

    /**
     * @hide
     */
    public void clearMutated() {
        super.clearMutated();
        mMutated = false;
    }

    Object getTargetByName(String name) {
        return mVectorState.mVGTargetsMap.get(name);
    }

    @Override
    public ConstantState getConstantState() {
        mVectorState.mChangingConfigurations = getChangingConfigurations();
        return mVectorState;
    }

    @Override
    public void draw(Canvas canvas) {
        // We will offset the bounds for drawBitmap, so copyBounds() here instead
        // of getBounds().
        copyBounds(mTmpBounds);
        if (mTmpBounds.width() <= 0 || mTmpBounds.height() <= 0) {
            // Nothing to draw
            return;
        }

        // Color filters always override tint filters.
        final ColorFilter colorFilter = (mColorFilter == null ? mTintFilter : mColorFilter);
        final long colorFilterNativeInstance = colorFilter == null ? 0 :
                colorFilter.native_instance;
        boolean canReuseCache = mVectorState.canReuseCache();
        nDraw(mVectorState.getNativeRenderer(), canvas.getNativeCanvasWrapper(),
                colorFilterNativeInstance, mTmpBounds, needMirroring(),
                canReuseCache);
    }


    @Override
    public int getAlpha() {
        return (int) (mVectorState.getAlpha() * 255);
    }

    @Override
    public void setAlpha(int alpha) {
        if (mVectorState.setAlpha(alpha / 255f)) {
            invalidateSelf();
        }
    }

    @Override
    public void setColorFilter(ColorFilter colorFilter) {
        mColorFilter = colorFilter;
        invalidateSelf();
    }

    @Override
    public ColorFilter getColorFilter() {
        return mColorFilter;
    }

    @Override
    public void setTintList(ColorStateList tint) {
        final VectorDrawableState state = mVectorState;
        if (state.mTint != tint) {
            state.mTint = tint;
            mTintFilter = updateTintFilter(mTintFilter, tint, state.mTintMode);
            invalidateSelf();
        }
    }

    @Override
    public void setTintMode(Mode tintMode) {
        final VectorDrawableState state = mVectorState;
        if (state.mTintMode != tintMode) {
            state.mTintMode = tintMode;
            mTintFilter = updateTintFilter(mTintFilter, state.mTint, tintMode);
            invalidateSelf();
        }
    }

    @Override
    public boolean isStateful() {
        return super.isStateful() || (mVectorState != null && mVectorState.isStateful());
    }

    @Override
    protected boolean onStateChange(int[] stateSet) {
        boolean changed = false;

        final VectorDrawableState state = mVectorState;
        if (state.onStateChange(stateSet)) {
            changed = true;
            state.mCacheDirty = true;
        }
        if (state.mTint != null && state.mTintMode != null) {
            mTintFilter = updateTintFilter(mTintFilter, state.mTint, state.mTintMode);
            changed = true;
        }

        return changed;
    }

    @Override
    public int getOpacity() {
        // We can't tell whether the drawable is fully opaque unless we examine all the pixels,
        // but we could tell it is transparent if the root alpha is 0.
        return getAlpha() == 0 ? PixelFormat.TRANSPARENT : PixelFormat.TRANSLUCENT;
    }

    @Override
    public int getIntrinsicWidth() {
        if (mDpiScaledDirty) {
            computeVectorSize();
        }
        return mDpiScaledWidth;
    }

    @Override
    public int getIntrinsicHeight() {
        if (mDpiScaledDirty) {
            computeVectorSize();
        }
        return mDpiScaledHeight;
    }

    /** @hide */
    @Override
    public Insets getOpticalInsets() {
        if (mDpiScaledDirty) {
            computeVectorSize();
        }
        return mDpiScaledInsets;
    }

    /*
     * Update local dimensions to adjust for a target density that may differ
     * from the source density against which the constant state was loaded.
     */
    void computeVectorSize() {
        final Insets opticalInsets = mVectorState.mOpticalInsets;

        final int sourceDensity = mVectorState.mDensity;
        final int targetDensity = mTargetDensity;
        if (targetDensity != sourceDensity) {
            mDpiScaledWidth = Drawable.scaleFromDensity(
                    (int) mVectorState.mBaseWidth, sourceDensity, targetDensity, true);
            mDpiScaledHeight = Drawable.scaleFromDensity(
                    (int) mVectorState.mBaseHeight,sourceDensity, targetDensity, true);
            final int left = Drawable.scaleFromDensity(
                    opticalInsets.left, sourceDensity, targetDensity, false);
            final int right = Drawable.scaleFromDensity(
                    opticalInsets.right, sourceDensity, targetDensity, false);
            final int top = Drawable.scaleFromDensity(
                    opticalInsets.top, sourceDensity, targetDensity, false);
            final int bottom = Drawable.scaleFromDensity(
                    opticalInsets.bottom, sourceDensity, targetDensity, false);
            mDpiScaledInsets = Insets.of(left, top, right, bottom);
        } else {
            mDpiScaledWidth = (int) mVectorState.mBaseWidth;
            mDpiScaledHeight = (int) mVectorState.mBaseHeight;
            mDpiScaledInsets = opticalInsets;
        }

        mDpiScaledDirty = false;
    }

    @Override
    public boolean canApplyTheme() {
        return (mVectorState != null && mVectorState.canApplyTheme()) || super.canApplyTheme();
    }

    @Override
    public void applyTheme(Theme t) {
        super.applyTheme(t);

        final VectorDrawableState state = mVectorState;
        if (state == null) {
            return;
        }

        final boolean changedDensity = mVectorState.setDensity(
                Drawable.resolveDensity(t.getResources(), 0));
        mDpiScaledDirty |= changedDensity;

        if (state.mThemeAttrs != null) {
            final TypedArray a = t.resolveAttributes(
                    state.mThemeAttrs, R.styleable.VectorDrawable);
            try {
                state.mCacheDirty = true;
                updateStateFromTypedArray(a);
            } catch (XmlPullParserException e) {
                throw new RuntimeException(e);
            } finally {
                a.recycle();
            }

            // May have changed size.
            mDpiScaledDirty = true;
        }

        // Apply theme to contained color state list.
        if (state.mTint != null && state.mTint.canApplyTheme()) {
            state.mTint = state.mTint.obtainForTheme(t);
        }

        if (mVectorState != null && mVectorState.canApplyTheme()) {
            mVectorState.applyTheme(t);
        }

        // Update local properties.
        updateLocalState(t.getResources());
    }

    /**
     * The size of a pixel when scaled from the intrinsic dimension to the viewport dimension.
     * This is used to calculate the path animation accuracy.
     *
     * @hide
     */
    public float getPixelSize() {
        if (mVectorState == null ||
                mVectorState.mBaseWidth == 0 ||
                mVectorState.mBaseHeight == 0 ||
                mVectorState.mViewportHeight == 0 ||
                mVectorState.mViewportWidth == 0) {
            return 1; // fall back to 1:1 pixel mapping.
        }
        float intrinsicWidth = mVectorState.mBaseWidth;
        float intrinsicHeight = mVectorState.mBaseHeight;
        float viewportWidth = mVectorState.mViewportWidth;
        float viewportHeight = mVectorState.mViewportHeight;
        float scaleX = viewportWidth / intrinsicWidth;
        float scaleY = viewportHeight / intrinsicHeight;
        return Math.min(scaleX, scaleY);
    }

    /** @hide */
    public static VectorDrawable create(Resources resources, int rid) {
        try {
            final XmlPullParser parser = resources.getXml(rid);
            final AttributeSet attrs = Xml.asAttributeSet(parser);
            int type;
            while ((type=parser.next()) != XmlPullParser.START_TAG &&
                    type != XmlPullParser.END_DOCUMENT) {
                // Empty loop
            }
            if (type != XmlPullParser.START_TAG) {
                throw new XmlPullParserException("No start tag found");
            }

            final VectorDrawable drawable = new VectorDrawable();
            drawable.inflate(resources, parser, attrs);

            return drawable;
        } catch (XmlPullParserException e) {
            Log.e(LOGTAG, "parser error", e);
        } catch (IOException e) {
            Log.e(LOGTAG, "parser error", e);
        }
        return null;
    }

    @Override
    public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
            @NonNull AttributeSet attrs, @Nullable Theme theme)
            throws XmlPullParserException, IOException {
        if (mVectorState.mRootGroup != null || mVectorState.mNativeTree != null) {
            // This VD has been used to display other VD resource content, clean up.
            if (mVectorState.mRootGroup != null) {
                // Remove child nodes' reference to tree
                mVectorState.mRootGroup.setTree(null);
            }
            mVectorState.mRootGroup = new VGroup();
            if (mVectorState.mNativeTree != null) {
                mVectorState.mNativeTree.release();
            }
            mVectorState.createNativeTree(mVectorState.mRootGroup);
        }
        final VectorDrawableState state = mVectorState;
        state.setDensity(Drawable.resolveDensity(r, 0));

        final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.VectorDrawable);
        updateStateFromTypedArray(a);
        a.recycle();

        mDpiScaledDirty = true;

        state.mCacheDirty = true;
        inflateChildElements(r, parser, attrs, theme);

        // Update local properties.
        updateLocalState(r);
    }

    private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
        final VectorDrawableState state = mVectorState;

        // Account for any configuration changes.
        state.mChangingConfigurations |= a.getChangingConfigurations();

        // Extract the theme attributes, if any.
        state.mThemeAttrs = a.extractThemeAttrs();

        final int tintMode = a.getInt(R.styleable.VectorDrawable_tintMode, -1);
        if (tintMode != -1) {
            state.mTintMode = Drawable.parseTintMode(tintMode, Mode.SRC_IN);
        }

        final ColorStateList tint = a.getColorStateList(R.styleable.VectorDrawable_tint);
        if (tint != null) {
            state.mTint = tint;
        }

        state.mAutoMirrored = a.getBoolean(
                R.styleable.VectorDrawable_autoMirrored, state.mAutoMirrored);

        float viewportWidth = a.getFloat(
                R.styleable.VectorDrawable_viewportWidth, state.mViewportWidth);
        float viewportHeight = a.getFloat(
                R.styleable.VectorDrawable_viewportHeight, state.mViewportHeight);
        state.setViewportSize(viewportWidth, viewportHeight);

        if (state.mViewportWidth <= 0) {
            throw new XmlPullParserException(a.getPositionDescription() +
                    "<vector> tag requires viewportWidth > 0");
        } else if (state.mViewportHeight <= 0) {
            throw new XmlPullParserException(a.getPositionDescription() +
                    "<vector> tag requires viewportHeight > 0");
        }

        state.mBaseWidth = a.getDimension(
                R.styleable.VectorDrawable_width, state.mBaseWidth);
        state.mBaseHeight = a.getDimension(
                R.styleable.VectorDrawable_height, state.mBaseHeight);

        if (state.mBaseWidth <= 0) {
            throw new XmlPullParserException(a.getPositionDescription() +
                    "<vector> tag requires width > 0");
        } else if (state.mBaseHeight <= 0) {
            throw new XmlPullParserException(a.getPositionDescription() +
                    "<vector> tag requires height > 0");
        }

        final int insetLeft = a.getDimensionPixelOffset(
                R.styleable.VectorDrawable_opticalInsetLeft, state.mOpticalInsets.left);
        final int insetTop = a.getDimensionPixelOffset(
                R.styleable.VectorDrawable_opticalInsetTop, state.mOpticalInsets.top);
        final int insetRight = a.getDimensionPixelOffset(
                R.styleable.VectorDrawable_opticalInsetRight, state.mOpticalInsets.right);
        final int insetBottom = a.getDimensionPixelOffset(
                R.styleable.VectorDrawable_opticalInsetBottom, state.mOpticalInsets.bottom);
        state.mOpticalInsets = Insets.of(insetLeft, insetTop, insetRight, insetBottom);

        final float alphaInFloat = a.getFloat(
                R.styleable.VectorDrawable_alpha, state.getAlpha());
        state.setAlpha(alphaInFloat);

        final String name = a.getString(R.styleable.VectorDrawable_name);
        if (name != null) {
            state.mRootName = name;
            state.mVGTargetsMap.put(name, state);
        }
    }

    private void inflateChildElements(Resources res, XmlPullParser parser, AttributeSet attrs,
            Theme theme) throws XmlPullParserException, IOException {
        final VectorDrawableState state = mVectorState;
        boolean noPathTag = true;

        // Use a stack to help to build the group tree.
        // The top of the stack is always the current group.
        final Stack<VGroup> groupStack = new Stack<VGroup>();
        groupStack.push(state.mRootGroup);

        int eventType = parser.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {
            if (eventType == XmlPullParser.START_TAG) {
                final String tagName = parser.getName();
                final VGroup currentGroup = groupStack.peek();

                if (SHAPE_PATH.equals(tagName)) {
                    final VFullPath path = new VFullPath();
                    path.inflate(res, attrs, theme);
                    currentGroup.addChild(path);
                    if (path.getPathName() != null) {
                        state.mVGTargetsMap.put(path.getPathName(), path);
                    }
                    noPathTag = false;
                    state.mChangingConfigurations |= path.mChangingConfigurations;
                } else if (SHAPE_CLIP_PATH.equals(tagName)) {
                    final VClipPath path = new VClipPath();
                    path.inflate(res, attrs, theme);
                    currentGroup.addChild(path);
                    if (path.getPathName() != null) {
                        state.mVGTargetsMap.put(path.getPathName(), path);
                    }
                    state.mChangingConfigurations |= path.mChangingConfigurations;
                } else if (SHAPE_GROUP.equals(tagName)) {
                    VGroup newChildGroup = new VGroup();
                    newChildGroup.inflate(res, attrs, theme);
                    currentGroup.addChild(newChildGroup);
                    groupStack.push(newChildGroup);
                    if (newChildGroup.getGroupName() != null) {
                        state.mVGTargetsMap.put(newChildGroup.getGroupName(),
                                newChildGroup);
                    }
                    state.mChangingConfigurations |= newChildGroup.mChangingConfigurations;
                }
            } else if (eventType == XmlPullParser.END_TAG) {
                final String tagName = parser.getName();
                if (SHAPE_GROUP.equals(tagName)) {
                    groupStack.pop();
                }
            }
            eventType = parser.next();
        }

        if (noPathTag) {
            final StringBuffer tag = new StringBuffer();

            if (tag.length() > 0) {
                tag.append(" or ");
            }
            tag.append(SHAPE_PATH);

            throw new XmlPullParserException("no " + tag + " defined");
        }
    }

    @Override
    public @Config int getChangingConfigurations() {
        return super.getChangingConfigurations() | mVectorState.getChangingConfigurations();
    }

    void setAllowCaching(boolean allowCaching) {
        nSetAllowCaching(mVectorState.getNativeRenderer(), allowCaching);
    }

    private boolean needMirroring() {
        return isAutoMirrored() && getLayoutDirection() == LayoutDirection.RTL;
    }

    @Override
    public void setAutoMirrored(boolean mirrored) {
        if (mVectorState.mAutoMirrored != mirrored) {
            mVectorState.mAutoMirrored = mirrored;
            invalidateSelf();
        }
    }

    @Override
    public boolean isAutoMirrored() {
        return mVectorState.mAutoMirrored;
    }

    static class VectorDrawableState extends ConstantState {
        // Variables below need to be copied (deep copy if applicable) for mutation.
        int[] mThemeAttrs;
        @Config int mChangingConfigurations;
        ColorStateList mTint = null;
        Mode mTintMode = DEFAULT_TINT_MODE;
        boolean mAutoMirrored;

        float mBaseWidth = 0;
        float mBaseHeight = 0;
        float mViewportWidth = 0;
        float mViewportHeight = 0;
        Insets mOpticalInsets = Insets.NONE;
        String mRootName = null;
        VGroup mRootGroup;
        VirtualRefBasePtr mNativeTree = null;

        int mDensity = DisplayMetrics.DENSITY_DEFAULT;
        final ArrayMap<String, Object> mVGTargetsMap = new ArrayMap<>();

        // Fields for cache
        int[] mCachedThemeAttrs;
        ColorStateList mCachedTint;
        Mode mCachedTintMode;
        boolean mCachedAutoMirrored;
        boolean mCacheDirty;

        // Deep copy for mutate() or implicitly mutate.
        public VectorDrawableState(VectorDrawableState copy) {
            if (copy != null) {
                mThemeAttrs = copy.mThemeAttrs;
                mChangingConfigurations = copy.mChangingConfigurations;
                mTint = copy.mTint;
                mTintMode = copy.mTintMode;
                mAutoMirrored = copy.mAutoMirrored;
                mRootGroup = new VGroup(copy.mRootGroup, mVGTargetsMap);
                createNativeTree(mRootGroup);

                mBaseWidth = copy.mBaseWidth;
                mBaseHeight = copy.mBaseHeight;
                setViewportSize(copy.mViewportWidth, copy.mViewportHeight);
                mOpticalInsets = copy.mOpticalInsets;

                mRootName = copy.mRootName;
                mDensity = copy.mDensity;
                if (copy.mRootName != null) {
                    mVGTargetsMap.put(copy.mRootName, this);
                }
            }
        }

        private void createNativeTree(VGroup rootGroup) {
            mNativeTree = new VirtualRefBasePtr(nCreateTree(rootGroup.mNativePtr));
            mRootGroup.setTree(mNativeTree);
        }

        long getNativeRenderer() {
            if (mNativeTree == null) {
                return 0;
            }
            return mNativeTree.get();
        }

        public boolean canReuseCache() {
            if (!mCacheDirty
                    && mCachedThemeAttrs == mThemeAttrs
                    && mCachedTint == mTint
                    && mCachedTintMode == mTintMode
                    && mCachedAutoMirrored == mAutoMirrored) {
                return true;
            }
            updateCacheStates();
            return false;
        }

        public void updateCacheStates() {
            // Use shallow copy here and shallow comparison in canReuseCache(),
            // likely hit cache miss more, but practically not much difference.
            mCachedThemeAttrs = mThemeAttrs;
            mCachedTint = mTint;
            mCachedTintMode = mTintMode;
            mCachedAutoMirrored = mAutoMirrored;
            mCacheDirty = false;
        }

        public void applyTheme(Theme t) {
            mRootGroup.applyTheme(t);
        }

        @Override
        public boolean canApplyTheme() {
            return mThemeAttrs != null
                    || (mRootGroup != null && mRootGroup.canApplyTheme())
                    || (mTint != null && mTint.canApplyTheme())
                    || super.canApplyTheme();
        }

        public VectorDrawableState() {
            mRootGroup = new VGroup();
            createNativeTree(mRootGroup);
        }

        @Override
        public Drawable newDrawable() {
            return new VectorDrawable(this, null);
        }

        @Override
        public Drawable newDrawable(Resources res) {
            return new VectorDrawable(this, res);
        }

        @Override
        public @Config int getChangingConfigurations() {
            return mChangingConfigurations
                    | (mTint != null ? mTint.getChangingConfigurations() : 0);
        }

        public boolean isStateful() {
            return (mTint != null && mTint.isStateful())
                    || (mRootGroup != null && mRootGroup.isStateful());
        }

        void setViewportSize(float viewportWidth, float viewportHeight) {
            mViewportWidth = viewportWidth;
            mViewportHeight = viewportHeight;
            nSetRendererViewportSize(getNativeRenderer(), viewportWidth, viewportHeight);
        }

        public final boolean setDensity(int targetDensity) {
            if (mDensity != targetDensity) {
                final int sourceDensity = mDensity;
                mDensity = targetDensity;
                applyDensityScaling(sourceDensity, targetDensity);
                return true;
            }
            return false;
        }

        private void applyDensityScaling(int sourceDensity, int targetDensity) {
            mBaseWidth = Drawable.scaleFromDensity(mBaseWidth, sourceDensity, targetDensity);
            mBaseHeight = Drawable.scaleFromDensity(mBaseHeight, sourceDensity, targetDensity);

            final int insetLeft = Drawable.scaleFromDensity(
                    mOpticalInsets.left, sourceDensity, targetDensity, false);
            final int insetTop = Drawable.scaleFromDensity(
                    mOpticalInsets.top, sourceDensity, targetDensity, false);
            final int insetRight = Drawable.scaleFromDensity(
                    mOpticalInsets.right, sourceDensity, targetDensity, false);
            final int insetBottom = Drawable.scaleFromDensity(
                    mOpticalInsets.bottom, sourceDensity, targetDensity, false);
            mOpticalInsets = Insets.of(insetLeft, insetTop, insetRight, insetBottom);
        }

        public boolean onStateChange(int[] stateSet) {
            return mRootGroup.onStateChange(stateSet);
        }

        /**
         * setAlpha() and getAlpha() are used mostly for animation purpose. Return true if alpha
         * has changed.
         */
        public boolean setAlpha(float alpha) {
            return nSetRootAlpha(mNativeTree.get(), alpha);
        }

        @SuppressWarnings("unused")
        public float getAlpha() {
            return nGetRootAlpha(mNativeTree.get());
        }
    }

    static class VGroup extends VObject {
        private static final int ROTATE_INDEX = 0;
        private static final int PIVOT_X_INDEX = 1;
        private static final int PIVOT_Y_INDEX = 2;
        private static final int SCALE_X_INDEX = 3;
        private static final int SCALE_Y_INDEX = 4;
        private static final int TRANSLATE_X_INDEX = 5;
        private static final int TRANSLATE_Y_INDEX = 6;
        private static final int TRANSFORM_PROPERTY_COUNT = 7;

        private static final HashMap<String, Integer> sPropertyMap =
                new HashMap<String, Integer>() {
                    {
                        put("translateX", TRANSLATE_X_INDEX);
                        put("translateY", TRANSLATE_Y_INDEX);
                        put("scaleX", SCALE_X_INDEX);
                        put("scaleY", SCALE_Y_INDEX);
                        put("pivotX", PIVOT_X_INDEX);
                        put("pivotY", PIVOT_Y_INDEX);
                        put("rotation", ROTATE_INDEX);
                    }
                };

        static int getPropertyIndex(String propertyName) {
            if (sPropertyMap.containsKey(propertyName)) {
                return sPropertyMap.get(propertyName);
            } else {
                // property not found
                return -1;
            }
        }

        // Temp array to store transform values obtained from native.
        private float[] mTransform;
        /////////////////////////////////////////////////////
        // Variables below need to be copied (deep copy if applicable) for mutation.
        private final ArrayList<VObject> mChildren = new ArrayList<>();
        private boolean mIsStateful;

        // mLocalMatrix is updated based on the update of transformation information,
        // either parsed from the XML or by animation.
        private @Config int mChangingConfigurations;
        private int[] mThemeAttrs;
        private String mGroupName = null;

        // The native object will be created in the constructor and will be destroyed in native
        // when the neither java nor native has ref to the tree. This pointer should be valid
        // throughout this VGroup Java object's life.
        private final long mNativePtr;
        public VGroup(VGroup copy, ArrayMap<String, Object> targetsMap) {

            mIsStateful = copy.mIsStateful;
            mThemeAttrs = copy.mThemeAttrs;
            mGroupName = copy.mGroupName;
            mChangingConfigurations = copy.mChangingConfigurations;
            if (mGroupName != null) {
                targetsMap.put(mGroupName, this);
            }
            mNativePtr = nCreateGroup(copy.mNativePtr);

            final ArrayList<VObject> children = copy.mChildren;
            for (int i = 0; i < children.size(); i++) {
                final VObject copyChild = children.get(i);
                if (copyChild instanceof VGroup) {
                    final VGroup copyGroup = (VGroup) copyChild;
                    addChild(new VGroup(copyGroup, targetsMap));
                } else {
                    final VPath newPath;
                    if (copyChild instanceof VFullPath) {
                        newPath = new VFullPath((VFullPath) copyChild);
                    } else if (copyChild instanceof VClipPath) {
                        newPath = new VClipPath((VClipPath) copyChild);
                    } else {
                        throw new IllegalStateException("Unknown object in the tree!");
                    }
                    addChild(newPath);
                    if (newPath.mPathName != null) {
                        targetsMap.put(newPath.mPathName, newPath);
                    }
                }
            }
        }

        public VGroup() {
            mNativePtr = nCreateGroup();
        }

        public String getGroupName() {
            return mGroupName;
        }

        public void addChild(VObject child) {
            nAddChild(mNativePtr, child.getNativePtr());
            mChildren.add(child);
            mIsStateful |= child.isStateful();
        }

        @Override
        public void setTree(VirtualRefBasePtr treeRoot) {
            super.setTree(treeRoot);
            for (int i = 0; i < mChildren.size(); i++) {
                mChildren.get(i).setTree(treeRoot);
            }
        }

        @Override
        public long getNativePtr() {
            return mNativePtr;
        }

        @Override
        public void inflate(Resources res, AttributeSet attrs, Theme theme) {
            final TypedArray a = obtainAttributes(res, theme, attrs,
                    R.styleable.VectorDrawableGroup);
            updateStateFromTypedArray(a);
            a.recycle();
        }

        void updateStateFromTypedArray(TypedArray a) {
            // Account for any configuration changes.
            mChangingConfigurations |= a.getChangingConfigurations();

            // Extract the theme attributes, if any.
            mThemeAttrs = a.extractThemeAttrs();
            if (mTransform == null) {
                // Lazy initialization: If the group is created through copy constructor, this may
                // never get called.
                mTransform = new float[TRANSFORM_PROPERTY_COUNT];
            }
            boolean success = nGetGroupProperties(mNativePtr, mTransform, TRANSFORM_PROPERTY_COUNT);
            if (!success) {
                throw new RuntimeException("Error: inconsistent property count");
            }
            float rotate = a.getFloat(R.styleable.VectorDrawableGroup_rotation,
                    mTransform[ROTATE_INDEX]);
            float pivotX = a.getFloat(R.styleable.VectorDrawableGroup_pivotX,
                    mTransform[PIVOT_X_INDEX]);
            float pivotY = a.getFloat(R.styleable.VectorDrawableGroup_pivotY,
                    mTransform[PIVOT_Y_INDEX]);
            float scaleX = a.getFloat(R.styleable.VectorDrawableGroup_scaleX,
                    mTransform[SCALE_X_INDEX]);
            float scaleY = a.getFloat(R.styleable.VectorDrawableGroup_scaleY,
                    mTransform[SCALE_Y_INDEX]);
            float translateX = a.getFloat(R.styleable.VectorDrawableGroup_translateX,
                    mTransform[TRANSLATE_X_INDEX]);
            float translateY = a.getFloat(R.styleable.VectorDrawableGroup_translateY,
                    mTransform[TRANSLATE_Y_INDEX]);

            final String groupName = a.getString(R.styleable.VectorDrawableGroup_name);
            if (groupName != null) {
                mGroupName = groupName;
                nSetName(mNativePtr, mGroupName);
            }
             nUpdateGroupProperties(mNativePtr, rotate, pivotX, pivotY, scaleX, scaleY,
                     translateX, translateY);
        }

        @Override
        public boolean onStateChange(int[] stateSet) {
            boolean changed = false;

            final ArrayList<VObject> children = mChildren;
            for (int i = 0, count = children.size(); i < count; i++) {
                final VObject child = children.get(i);
                if (child.isStateful()) {
                    changed |= child.onStateChange(stateSet);
                }
            }

            return changed;
        }

        @Override
        public boolean isStateful() {
            return mIsStateful;
        }

        @Override
        public boolean canApplyTheme() {
            if (mThemeAttrs != null) {
                return true;
            }

            final ArrayList<VObject> children = mChildren;
            for (int i = 0, count = children.size(); i < count; i++) {
                final VObject child = children.get(i);
                if (child.canApplyTheme()) {
                    return true;
                }
            }

            return false;
        }

        @Override
        public void applyTheme(Theme t) {
            if (mThemeAttrs != null) {
                final TypedArray a = t.resolveAttributes(mThemeAttrs,
                        R.styleable.VectorDrawableGroup);
                updateStateFromTypedArray(a);
                a.recycle();
            }

            final ArrayList<VObject> children = mChildren;
            for (int i = 0, count = children.size(); i < count; i++) {
                final VObject child = children.get(i);
                if (child.canApplyTheme()) {
                    child.applyTheme(t);

                    // Applying a theme may have made the child stateful.
                    mIsStateful |= child.isStateful();
                }
            }
        }

        /* Setters and Getters, used by animator from AnimatedVectorDrawable. */
        @SuppressWarnings("unused")
        public float getRotation() {
            return isTreeValid() ? nGetRotation(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setRotation(float rotation) {
            if (isTreeValid()) {
                nSetRotation(mNativePtr, rotation);
            }
        }

        @SuppressWarnings("unused")
        public float getPivotX() {
            return isTreeValid() ? nGetPivotX(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setPivotX(float pivotX) {
            if (isTreeValid()) {
                nSetPivotX(mNativePtr, pivotX);
            }
        }

        @SuppressWarnings("unused")
        public float getPivotY() {
            return isTreeValid() ? nGetPivotY(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setPivotY(float pivotY) {
            if (isTreeValid()) {
                nSetPivotY(mNativePtr, pivotY);
            }
        }

        @SuppressWarnings("unused")
        public float getScaleX() {
            return isTreeValid() ? nGetScaleX(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setScaleX(float scaleX) {
            if (isTreeValid()) {
                nSetScaleX(mNativePtr, scaleX);
            }
        }

        @SuppressWarnings("unused")
        public float getScaleY() {
            return isTreeValid() ? nGetScaleY(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setScaleY(float scaleY) {
            if (isTreeValid()) {
                nSetScaleY(mNativePtr, scaleY);
            }
        }

        @SuppressWarnings("unused")
        public float getTranslateX() {
            return isTreeValid() ? nGetTranslateX(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setTranslateX(float translateX) {
            if (isTreeValid()) {
                nSetTranslateX(mNativePtr, translateX);
            }
        }

        @SuppressWarnings("unused")
        public float getTranslateY() {
            return isTreeValid() ? nGetTranslateY(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        public void setTranslateY(float translateY) {
            if (isTreeValid()) {
                nSetTranslateY(mNativePtr, translateY);
            }
        }
    }

    /**
     * Common Path information for clip path and normal path.
     */
    static abstract class VPath extends VObject {
        protected PathParser.PathData mPathData = null;

        String mPathName;
        @Config int mChangingConfigurations;

        public VPath() {
            // Empty constructor.
        }

        public VPath(VPath copy) {
            mPathName = copy.mPathName;
            mChangingConfigurations = copy.mChangingConfigurations;
            mPathData = copy.mPathData == null ? null : new PathParser.PathData(copy.mPathData);
        }

        public String getPathName() {
            return mPathName;
        }

        /* Setters and Getters, used by animator from AnimatedVectorDrawable. */
        @SuppressWarnings("unused")
        public PathParser.PathData getPathData() {
            return mPathData;
        }

        // TODO: Move the PathEvaluator and this setter and the getter above into native.
        @SuppressWarnings("unused")
        public void setPathData(PathParser.PathData pathData) {
            mPathData.setPathData(pathData);
            if (isTreeValid()) {
                nSetPathData(getNativePtr(), mPathData.getNativePtr());
            }
        }
    }

    /**
     * Clip path, which only has name and pathData.
     */
    private static class VClipPath extends VPath {
        private final long mNativePtr;

        public VClipPath() {
            mNativePtr = nCreateClipPath();
        }

        public VClipPath(VClipPath copy) {
            super(copy);
            mNativePtr = nCreateClipPath(copy.mNativePtr);
        }

        @Override
        public long getNativePtr() {
            return mNativePtr;
        }

        @Override
        public void inflate(Resources r, AttributeSet attrs, Theme theme) {
            final TypedArray a = obtainAttributes(r, theme, attrs,
                    R.styleable.VectorDrawableClipPath);
            updateStateFromTypedArray(a);
            a.recycle();
        }

        @Override
        public boolean canApplyTheme() {
            return false;
        }

        @Override
        public void applyTheme(Theme theme) {
            // No-op.
        }

        @Override
        public boolean onStateChange(int[] stateSet) {
            return false;
        }

        @Override
        public boolean isStateful() {
            return false;
        }

        private void updateStateFromTypedArray(TypedArray a) {
            // Account for any configuration changes.
            mChangingConfigurations |= a.getChangingConfigurations();

            final String pathName = a.getString(R.styleable.VectorDrawableClipPath_name);
            if (pathName != null) {
                mPathName = pathName;
                nSetName(mNativePtr, mPathName);
            }

            final String pathDataString = a.getString(R.styleable.VectorDrawableClipPath_pathData);
            if (pathDataString != null) {
                mPathData = new PathParser.PathData(pathDataString);
                nSetPathString(mNativePtr, pathDataString, pathDataString.length());
            }
        }
    }

    /**
     * Normal path, which contains all the fill / paint information.
     */
    static class VFullPath extends VPath {
        private static final int STROKE_WIDTH_INDEX = 0;
        private static final int STROKE_COLOR_INDEX = 1;
        private static final int STROKE_ALPHA_INDEX = 2;
        private static final int FILL_COLOR_INDEX = 3;
        private static final int FILL_ALPHA_INDEX = 4;
        private static final int TRIM_PATH_START_INDEX = 5;
        private static final int TRIM_PATH_END_INDEX = 6;
        private static final int TRIM_PATH_OFFSET_INDEX = 7;
        private static final int STROKE_LINE_CAP_INDEX = 8;
        private static final int STROKE_LINE_JOIN_INDEX = 9;
        private static final int STROKE_MITER_LIMIT_INDEX = 10;
        private static final int FILL_TYPE_INDEX = 11;
        private static final int TOTAL_PROPERTY_COUNT = 12;

        // Property map for animatable attributes.
        private final static HashMap<String, Integer> sPropertyMap
                = new HashMap<String, Integer> () {
            {
                put("strokeWidth", STROKE_WIDTH_INDEX);
                put("strokeColor", STROKE_COLOR_INDEX);
                put("strokeAlpha", STROKE_ALPHA_INDEX);
                put("fillColor", FILL_COLOR_INDEX);
                put("fillAlpha", FILL_ALPHA_INDEX);
                put("trimPathStart", TRIM_PATH_START_INDEX);
                put("trimPathEnd", TRIM_PATH_END_INDEX);
                put("trimPathOffset", TRIM_PATH_OFFSET_INDEX);
            }
        };

        // Temp array to store property data obtained from native getter.
        private byte[] mPropertyData;
        /////////////////////////////////////////////////////
        // Variables below need to be copied (deep copy if applicable) for mutation.
        private int[] mThemeAttrs;

        ComplexColor mStrokeColors = null;
        ComplexColor mFillColors = null;
        private final long mNativePtr;

        public VFullPath() {
            mNativePtr = nCreateFullPath();
        }

        public VFullPath(VFullPath copy) {
            super(copy);
            mNativePtr = nCreateFullPath(copy.mNativePtr);
            mThemeAttrs = copy.mThemeAttrs;
            mStrokeColors = copy.mStrokeColors;
            mFillColors = copy.mFillColors;
        }

        int getPropertyIndex(String propertyName) {
            if (!sPropertyMap.containsKey(propertyName)) {
                return -1;
            } else {
                return sPropertyMap.get(propertyName);
            }
        }

        @Override
        public boolean onStateChange(int[] stateSet) {
            boolean changed = false;

            if (mStrokeColors != null && mStrokeColors instanceof ColorStateList) {
                final int oldStrokeColor = getStrokeColor();
                final int newStrokeColor =
                        ((ColorStateList) mStrokeColors).getColorForState(stateSet, oldStrokeColor);
                changed |= oldStrokeColor != newStrokeColor;
                if (oldStrokeColor != newStrokeColor) {
                    nSetStrokeColor(mNativePtr, newStrokeColor);
                }
            }

            if (mFillColors != null && mFillColors instanceof ColorStateList) {
                final int oldFillColor = getFillColor();
                final int newFillColor = ((ColorStateList) mFillColors).getColorForState(stateSet, oldFillColor);
                changed |= oldFillColor != newFillColor;
                if (oldFillColor != newFillColor) {
                    nSetFillColor(mNativePtr, newFillColor);
                }
            }

            return changed;
        }

        @Override
        public boolean isStateful() {
            return mStrokeColors != null || mFillColors != null;
        }

        @Override
        public long getNativePtr() {
            return mNativePtr;
        }

        @Override
        public void inflate(Resources r, AttributeSet attrs, Theme theme) {
            final TypedArray a = obtainAttributes(r, theme, attrs,
                    R.styleable.VectorDrawablePath);
            updateStateFromTypedArray(a);
            a.recycle();
        }

        private void updateStateFromTypedArray(TypedArray a) {
            int byteCount = TOTAL_PROPERTY_COUNT * 4;
            if (mPropertyData == null) {
                // Lazy initialization: If the path is created through copy constructor, this may
                // never get called.
                mPropertyData = new byte[byteCount];
            }
            // The bulk getters/setters of property data (e.g. stroke width, color, etc) allows us
            // to pull current values from native and store modifications with only two methods,
            // minimizing JNI overhead.
            boolean success = nGetFullPathProperties(mNativePtr, mPropertyData, byteCount);
            if (!success) {
                throw new RuntimeException("Error: inconsistent property count");
            }

            ByteBuffer properties = ByteBuffer.wrap(mPropertyData);
            properties.order(ByteOrder.nativeOrder());
            float strokeWidth = properties.getFloat(STROKE_WIDTH_INDEX * 4);
            int strokeColor = properties.getInt(STROKE_COLOR_INDEX * 4);
            float strokeAlpha = properties.getFloat(STROKE_ALPHA_INDEX * 4);
            int fillColor =  properties.getInt(FILL_COLOR_INDEX * 4);
            float fillAlpha = properties.getFloat(FILL_ALPHA_INDEX * 4);
            float trimPathStart = properties.getFloat(TRIM_PATH_START_INDEX * 4);
            float trimPathEnd = properties.getFloat(TRIM_PATH_END_INDEX * 4);
            float trimPathOffset = properties.getFloat(TRIM_PATH_OFFSET_INDEX * 4);
            int strokeLineCap =  properties.getInt(STROKE_LINE_CAP_INDEX * 4);
            int strokeLineJoin = properties.getInt(STROKE_LINE_JOIN_INDEX * 4);
            float strokeMiterLimit = properties.getFloat(STROKE_MITER_LIMIT_INDEX * 4);
            int fillType = properties.getInt(FILL_TYPE_INDEX * 4);
            Shader fillGradient = null;
            Shader strokeGradient = null;
            // Account for any configuration changes.
            mChangingConfigurations |= a.getChangingConfigurations();

            // Extract the theme attributes, if any.
            mThemeAttrs = a.extractThemeAttrs();

            final String pathName = a.getString(R.styleable.VectorDrawablePath_name);
            if (pathName != null) {
                mPathName = pathName;
                nSetName(mNativePtr, mPathName);
            }

            final String pathString = a.getString(R.styleable.VectorDrawablePath_pathData);
            if (pathString != null) {
                mPathData = new PathParser.PathData(pathString);
                nSetPathString(mNativePtr, pathString, pathString.length());
            }

            final ComplexColor fillColors = a.getComplexColor(
                    R.styleable.VectorDrawablePath_fillColor);
            if (fillColors != null) {
                // If the colors is a gradient color, or the color state list is stateful, keep the
                // colors information. Otherwise, discard the colors and keep the default color.
                if (fillColors instanceof  GradientColor) {
                    mFillColors = fillColors;
                    fillGradient = ((GradientColor) fillColors).getShader();
                } else if (fillColors.isStateful()) {
                    mFillColors = fillColors;
                } else {
                    mFillColors = null;
                }
                fillColor = fillColors.getDefaultColor();
            }

            final ComplexColor strokeColors = a.getComplexColor(
                    R.styleable.VectorDrawablePath_strokeColor);
            if (strokeColors != null) {
                // If the colors is a gradient color, or the color state list is stateful, keep the
                // colors information. Otherwise, discard the colors and keep the default color.
                if (strokeColors instanceof GradientColor) {
                    mStrokeColors = strokeColors;
                    strokeGradient = ((GradientColor) strokeColors).getShader();
                } else if (strokeColors.isStateful()) {
                    mStrokeColors = strokeColors;
                } else {
                    mStrokeColors = null;
                }
                strokeColor = strokeColors.getDefaultColor();
            }
            // Update the gradient info, even if the gradiet is null.
            nUpdateFullPathFillGradient(mNativePtr,
                    fillGradient != null ? fillGradient.getNativeInstance() : 0);
            nUpdateFullPathStrokeGradient(mNativePtr,
                    strokeGradient != null ? strokeGradient.getNativeInstance() : 0);

            fillAlpha = a.getFloat(R.styleable.VectorDrawablePath_fillAlpha, fillAlpha);

            strokeLineCap = a.getInt(
                    R.styleable.VectorDrawablePath_strokeLineCap, strokeLineCap);
            strokeLineJoin = a.getInt(
                    R.styleable.VectorDrawablePath_strokeLineJoin, strokeLineJoin);
            strokeMiterLimit = a.getFloat(
                    R.styleable.VectorDrawablePath_strokeMiterLimit, strokeMiterLimit);
            strokeAlpha = a.getFloat(R.styleable.VectorDrawablePath_strokeAlpha,
                    strokeAlpha);
            strokeWidth = a.getFloat(R.styleable.VectorDrawablePath_strokeWidth,
                    strokeWidth);
            trimPathEnd = a.getFloat(R.styleable.VectorDrawablePath_trimPathEnd,
                    trimPathEnd);
            trimPathOffset = a.getFloat(
                    R.styleable.VectorDrawablePath_trimPathOffset, trimPathOffset);
            trimPathStart = a.getFloat(
                    R.styleable.VectorDrawablePath_trimPathStart, trimPathStart);
            fillType = a.getInt(R.styleable.VectorDrawablePath_fillType, fillType);

            nUpdateFullPathProperties(mNativePtr, strokeWidth, strokeColor, strokeAlpha,
                    fillColor, fillAlpha, trimPathStart, trimPathEnd, trimPathOffset,
                    strokeMiterLimit, strokeLineCap, strokeLineJoin, fillType);
        }

        @Override
        public boolean canApplyTheme() {
            if (mThemeAttrs != null) {
                return true;
            }

            boolean fillCanApplyTheme = canComplexColorApplyTheme(mFillColors);
            boolean strokeCanApplyTheme = canComplexColorApplyTheme(mStrokeColors);
            if (fillCanApplyTheme || strokeCanApplyTheme) {
                return true;
            }
            return false;

        }

        @Override
        public void applyTheme(Theme t) {
            // Resolve the theme attributes directly referred by the VectorDrawable.
            if (mThemeAttrs != null) {
                final TypedArray a = t.resolveAttributes(mThemeAttrs, R.styleable.VectorDrawablePath);
                updateStateFromTypedArray(a);
                a.recycle();
            }

            // Resolve the theme attributes in-directly referred by the VectorDrawable, for example,
            // fillColor can refer to a color state list which itself needs to apply theme.
            // And this is the reason we still want to keep partial update for the path's properties.
            boolean fillCanApplyTheme = canComplexColorApplyTheme(mFillColors);
            boolean strokeCanApplyTheme = canComplexColorApplyTheme(mStrokeColors);

            if (fillCanApplyTheme) {
                mFillColors = mFillColors.obtainForTheme(t);
                if (mFillColors instanceof GradientColor) {
                    nUpdateFullPathFillGradient(mNativePtr,
                            ((GradientColor) mFillColors).getShader().getNativeInstance());
                } else if (mFillColors instanceof ColorStateList) {
                    nSetFillColor(mNativePtr, mFillColors.getDefaultColor());
                }
            }

            if (strokeCanApplyTheme) {
                mStrokeColors = mStrokeColors.obtainForTheme(t);
                if (mStrokeColors instanceof GradientColor) {
                    nUpdateFullPathStrokeGradient(mNativePtr,
                            ((GradientColor) mStrokeColors).getShader().getNativeInstance());
                } else if (mStrokeColors instanceof ColorStateList) {
                    nSetStrokeColor(mNativePtr, mStrokeColors.getDefaultColor());
                }
            }
        }

        private boolean canComplexColorApplyTheme(ComplexColor complexColor) {
            return complexColor != null && complexColor.canApplyTheme();
        }

        /* Setters and Getters, used by animator from AnimatedVectorDrawable. */
        @SuppressWarnings("unused")
        int getStrokeColor() {
            return isTreeValid() ? nGetStrokeColor(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setStrokeColor(int strokeColor) {
            mStrokeColors = null;
            if (isTreeValid()) {
                nSetStrokeColor(mNativePtr, strokeColor);
            }
        }

        @SuppressWarnings("unused")
        float getStrokeWidth() {
            return isTreeValid() ? nGetStrokeWidth(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setStrokeWidth(float strokeWidth) {
            if (isTreeValid()) {
                nSetStrokeWidth(mNativePtr, strokeWidth);
            }
        }

        @SuppressWarnings("unused")
        float getStrokeAlpha() {
            return isTreeValid() ? nGetStrokeAlpha(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setStrokeAlpha(float strokeAlpha) {
            if (isTreeValid()) {
                nSetStrokeAlpha(mNativePtr, strokeAlpha);
            }
        }

        @SuppressWarnings("unused")
        int getFillColor() {
            return isTreeValid() ? nGetFillColor(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setFillColor(int fillColor) {
            mFillColors = null;
            if (isTreeValid()) {
                nSetFillColor(mNativePtr, fillColor);
            }
        }

        @SuppressWarnings("unused")
        float getFillAlpha() {
            return isTreeValid() ? nGetFillAlpha(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setFillAlpha(float fillAlpha) {
            if (isTreeValid()) {
                nSetFillAlpha(mNativePtr, fillAlpha);
            }
        }

        @SuppressWarnings("unused")
        float getTrimPathStart() {
            return isTreeValid() ? nGetTrimPathStart(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setTrimPathStart(float trimPathStart) {
            if (isTreeValid()) {
                nSetTrimPathStart(mNativePtr, trimPathStart);
            }
        }

        @SuppressWarnings("unused")
        float getTrimPathEnd() {
            return isTreeValid() ? nGetTrimPathEnd(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setTrimPathEnd(float trimPathEnd) {
            if (isTreeValid()) {
                nSetTrimPathEnd(mNativePtr, trimPathEnd);
            }
        }

        @SuppressWarnings("unused")
        float getTrimPathOffset() {
            return isTreeValid() ? nGetTrimPathOffset(mNativePtr) : 0;
        }

        @SuppressWarnings("unused")
        void setTrimPathOffset(float trimPathOffset) {
            if (isTreeValid()) {
                nSetTrimPathOffset(mNativePtr, trimPathOffset);
            }
        }
    }

    abstract static class VObject {
        VirtualRefBasePtr mTreePtr = null;
        boolean isTreeValid() {
            return mTreePtr != null && mTreePtr.get() != 0;
        }
        void setTree(VirtualRefBasePtr ptr) {
            mTreePtr = ptr;
        }
        abstract long getNativePtr();
        abstract void inflate(Resources r, AttributeSet attrs, Theme theme);
        abstract boolean canApplyTheme();
        abstract void applyTheme(Theme t);
        abstract boolean onStateChange(int[] state);
        abstract boolean isStateful();
    }

    private static native long nCreateTree(long rootGroupPtr);
    private static native void nSetRendererViewportSize(long rendererPtr, float viewportWidth,
            float viewportHeight);
    private static native boolean nSetRootAlpha(long rendererPtr, float alpha);
    private static native float nGetRootAlpha(long rendererPtr);
    private static native void nSetAllowCaching(long rendererPtr, boolean allowCaching);

    private static native void nDraw(long rendererPtr, long canvasWrapperPtr,
            long colorFilterPtr, Rect bounds, boolean needsMirroring, boolean canReuseCache);
    private static native long nCreateFullPath();
    private static native long nCreateFullPath(long nativeFullPathPtr);
    private static native boolean nGetFullPathProperties(long pathPtr, byte[] properties,
            int length);

    private static native void nUpdateFullPathProperties(long pathPtr, float strokeWidth,
            int strokeColor, float strokeAlpha, int fillColor, float fillAlpha, float trimPathStart,
            float trimPathEnd, float trimPathOffset, float strokeMiterLimit, int strokeLineCap,
            int strokeLineJoin, int fillType);
    private static native void nUpdateFullPathFillGradient(long pathPtr, long fillGradientPtr);
    private static native void nUpdateFullPathStrokeGradient(long pathPtr, long strokeGradientPtr);

    private static native long nCreateClipPath();
    private static native long nCreateClipPath(long clipPathPtr);

    private static native long nCreateGroup();
    private static native long nCreateGroup(long groupPtr);
    private static native void nSetName(long nodePtr, String name);
    private static native boolean nGetGroupProperties(long groupPtr, float[] properties,
            int length);
    private static native void nUpdateGroupProperties(long groupPtr, float rotate, float pivotX,
            float pivotY, float scaleX, float scaleY, float translateX, float translateY);

    private static native void nAddChild(long groupPtr, long nodePtr);
    private static native void nSetPathString(long pathPtr, String pathString, int length);

    /**
     * The setters and getters below for paths and groups are here temporarily, and will be
     * removed once the animation in AVD is replaced with RenderNodeAnimator, in which case the
     * animation will modify these properties in native. By then no JNI hopping would be necessary
     * for VD during animation, and these setters and getters will be obsolete.
     */
    // Setters and getters during animation.
    private static native float nGetRotation(long groupPtr);
    private static native void nSetRotation(long groupPtr, float rotation);
    private static native float nGetPivotX(long groupPtr);
    private static native void nSetPivotX(long groupPtr, float pivotX);
    private static native float nGetPivotY(long groupPtr);
    private static native void nSetPivotY(long groupPtr, float pivotY);
    private static native float nGetScaleX(long groupPtr);
    private static native void nSetScaleX(long groupPtr, float scaleX);
    private static native float nGetScaleY(long groupPtr);
    private static native void nSetScaleY(long groupPtr, float scaleY);
    private static native float nGetTranslateX(long groupPtr);
    private static native void nSetTranslateX(long groupPtr, float translateX);
    private static native float nGetTranslateY(long groupPtr);
    private static native void nSetTranslateY(long groupPtr, float translateY);

    // Setters and getters for VPath during animation.
    private static native void nSetPathData(long pathPtr, long pathDataPtr);
    private static native float nGetStrokeWidth(long pathPtr);
    private static native void nSetStrokeWidth(long pathPtr, float width);
    private static native int nGetStrokeColor(long pathPtr);
    private static native void nSetStrokeColor(long pathPtr, int strokeColor);
    private static native float nGetStrokeAlpha(long pathPtr);
    private static native void nSetStrokeAlpha(long pathPtr, float alpha);
    private static native int nGetFillColor(long pathPtr);
    private static native void nSetFillColor(long pathPtr, int fillColor);
    private static native float nGetFillAlpha(long pathPtr);
    private static native void nSetFillAlpha(long pathPtr, float fillAlpha);
    private static native float nGetTrimPathStart(long pathPtr);
    private static native void nSetTrimPathStart(long pathPtr, float trimPathStart);
    private static native float nGetTrimPathEnd(long pathPtr);
    private static native void nSetTrimPathEnd(long pathPtr, float trimPathEnd);
    private static native float nGetTrimPathOffset(long pathPtr);
    private static native void nSetTrimPathOffset(long pathPtr, float trimPathOffset);
}