/*
 * Copyright (C) 2006 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;

import android.annotation.ColorInt;
import android.annotation.NonNull;
import android.annotation.Size;
import android.graphics.fonts.FontVariationAxis;
import android.os.LocaleList;
import android.text.GraphicsOperations;
import android.text.SpannableString;
import android.text.SpannedString;
import android.text.TextUtils;

import com.android.internal.annotations.GuardedBy;

import dalvik.annotation.optimization.CriticalNative;
import dalvik.annotation.optimization.FastNative;

import libcore.util.NativeAllocationRegistry;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Locale;

The Paint class holds the style and color information about how to draw
geometries, text and bitmaps.
/**
 * The Paint class holds the style and color information about how to draw
 * geometries, text and bitmaps.
 */
public class Paint {

    private long mNativePaint;
    private long mNativeShader;
    private long mNativeColorFilter;

    // The approximate size of a native paint object.
    private static final long NATIVE_PAINT_SIZE = 98;

    // Use a Holder to allow static initialization of Paint in the boot image.
    private static class NoImagePreloadHolder {
        public static final NativeAllocationRegistry sRegistry = new NativeAllocationRegistry(
                Paint.class.getClassLoader(), nGetNativeFinalizer(), NATIVE_PAINT_SIZE);
    }

    private ColorFilter mColorFilter;
    private MaskFilter  mMaskFilter;
    private PathEffect  mPathEffect;
    private Shader      mShader;
    private Typeface    mTypeface;
    private Xfermode    mXfermode;

    private boolean     mHasCompatScaling;
    private float       mCompatScaling;
    private float       mInvCompatScaling;

    private LocaleList  mLocales;
    private String      mFontFeatureSettings;
    private String      mFontVariationSettings;

    private float mShadowLayerRadius;
    private float mShadowLayerDx;
    private float mShadowLayerDy;
    private int mShadowLayerColor;

    private static final Object sCacheLock = new Object();

    
Cache for the Minikin language list ID.
A map from a string representation of the LocaleList to Minikin's language list ID.
/**
     * Cache for the Minikin language list ID.
     *
     * A map from a string representation of the LocaleList to Minikin's language list ID.
     */
    @GuardedBy("sCacheLock")
    private static final HashMap<String, Integer> sMinikinLocaleListIdCache = new HashMap<>();

    
@hide
/**
     * @hide
     */
    public  int         mBidiFlags = BIDI_DEFAULT_LTR;

    static final Style[] sStyleArray = {
        Style.FILL, Style.STROKE, Style.FILL_AND_STROKE
    };
    static final Cap[] sCapArray = {
        Cap.BUTT, Cap.ROUND, Cap.SQUARE
    };
    static final Join[] sJoinArray = {
        Join.MITER, Join.ROUND, Join.BEVEL
    };
    static final Align[] sAlignArray = {
        Align.LEFT, Align.CENTER, Align.RIGHT
    };

    
Paint flag that enables antialiasing when drawing.
Enabling this flag will cause all draw operations that support
antialiasing to use it.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that enables antialiasing when drawing.
     *
     * <p>Enabling this flag will cause all draw operations that support
     * antialiasing to use it.</p>
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int ANTI_ALIAS_FLAG     = 0x01;
    
Paint flag that enables bilinear sampling on scaled bitmaps.
If cleared, scaled bitmaps will be drawn with nearest neighbor
sampling, likely resulting in artifacts. This should generally be on
when drawing bitmaps, unless performance-bound (rendering to software
canvas) or preferring pixelation artifacts to blurriness when scaling
significantly.
If bitmaps are scaled for device density at creation time (as
resource bitmaps often are) the filtering will already have been
done.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that enables bilinear sampling on scaled bitmaps.
     *
     * <p>If cleared, scaled bitmaps will be drawn with nearest neighbor
     * sampling, likely resulting in artifacts. This should generally be on
     * when drawing bitmaps, unless performance-bound (rendering to software
     * canvas) or preferring pixelation artifacts to blurriness when scaling
     * significantly.</p>
     *
     * <p>If bitmaps are scaled for device density at creation time (as
     * resource bitmaps often are) the filtering will already have been
     * done.</p>
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int FILTER_BITMAP_FLAG  = 0x02;
    
Paint flag that enables dithering when blitting.
Enabling this flag applies a dither to any blit operation where the
target's colour space is more constrained than the source.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that enables dithering when blitting.
     *
     * <p>Enabling this flag applies a dither to any blit operation where the
     * target's colour space is more constrained than the source.
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int DITHER_FLAG         = 0x04;
    
Paint flag that applies an underline decoration to drawn text.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that applies an underline decoration to drawn text.
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int UNDERLINE_TEXT_FLAG = 0x08;
    
Paint flag that applies a strike-through decoration to drawn text.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that applies a strike-through decoration to drawn text.
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int STRIKE_THRU_TEXT_FLAG = 0x10;
    
Paint flag that applies a synthetic bolding effect to drawn text.
Enabling this flag will cause text draw operations to apply a simulated bold effect when drawing a Typeface that is not already bold.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that applies a synthetic bolding effect to drawn text.
     *
     * <p>Enabling this flag will cause text draw operations to apply a
     * simulated bold effect when drawing a {@link Typeface} that is not
     * already bold.</p>
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int FAKE_BOLD_TEXT_FLAG = 0x20;
    
Paint flag that enables smooth linear scaling of text.
Enabling this flag does not actually scale text, but rather adjusts
text draw operations to deal gracefully with smooth adjustment of scale.
When this flag is enabled, font hinting is disabled to prevent shape
deformation between scale factors, and glyph caching is disabled due to
the large number of glyph images that will be generated.
SUBPIXEL_TEXT_FLAG should be used in conjunction with this flag to prevent glyph positions from snapping to whole pixel values as scale factor is adjusted.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that enables smooth linear scaling of text.
     *
     * <p>Enabling this flag does not actually scale text, but rather adjusts
     * text draw operations to deal gracefully with smooth adjustment of scale.
     * When this flag is enabled, font hinting is disabled to prevent shape
     * deformation between scale factors, and glyph caching is disabled due to
     * the large number of glyph images that will be generated.</p>
     *
     * <p>{@link #SUBPIXEL_TEXT_FLAG} should be used in conjunction with this
     * flag to prevent glyph positions from snapping to whole pixel values as
     * scale factor is adjusted.</p>
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int LINEAR_TEXT_FLAG    = 0x40;
    
Paint flag that enables subpixel positioning of text.
Enabling this flag causes glyph advances to be computed with subpixel
accuracy.
This can be used with LINEAR_TEXT_FLAG to prevent text from jittering during smooth scale transitions.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that enables subpixel positioning of text.
     *
     * <p>Enabling this flag causes glyph advances to be computed with subpixel
     * accuracy.</p>
     *
     * <p>This can be used with {@link #LINEAR_TEXT_FLAG} to prevent text from
     * jittering during smooth scale transitions.</p>
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int SUBPIXEL_TEXT_FLAG  = 0x80;
    
Legacy Paint flag, no longer used. /** Legacy Paint flag, no longer used. */
    public static final int DEV_KERN_TEXT_FLAG  = 0x100;
    
@hide
bit mask for the flag enabling subpixel glyph rendering for text/** @hide bit mask for the flag enabling subpixel glyph rendering for text */
    public static final int LCD_RENDER_TEXT_FLAG = 0x200;
    
Paint flag that enables the use of bitmap fonts when drawing text.
Disabling this flag will prevent text draw operations from using
embedded bitmap strikes in fonts, causing fonts with both scalable
outlines and bitmap strikes to draw only the scalable outlines, and
fonts with only bitmap strikes to not draw at all.
See Also:
Paint(int)
setFlags(int)/**
     * Paint flag that enables the use of bitmap fonts when drawing text.
     *
     * <p>Disabling this flag will prevent text draw operations from using
     * embedded bitmap strikes in fonts, causing fonts with both scalable
     * outlines and bitmap strikes to draw only the scalable outlines, and
     * fonts with only bitmap strikes to not draw at all.</p>
     *
     * @see #Paint(int)
     * @see #setFlags(int)
     */
    public static final int EMBEDDED_BITMAP_TEXT_FLAG = 0x400;
    
@hide
bit mask for the flag forcing freetype's autohinter on for text/** @hide bit mask for the flag forcing freetype's autohinter on for text */
    public static final int AUTO_HINTING_TEXT_FLAG = 0x800;
    
@hide
bit mask for the flag enabling vertical rendering for text/** @hide bit mask for the flag enabling vertical rendering for text */
    public static final int VERTICAL_TEXT_FLAG = 0x1000;

    // These flags are always set on a new/reset paint, even if flags 0 is passed.
    static final int HIDDEN_DEFAULT_PAINT_FLAGS = DEV_KERN_TEXT_FLAG | EMBEDDED_BITMAP_TEXT_FLAG;

    
Font hinter option that disables font hinting.
See Also:
setHinting(int)/**
     * Font hinter option that disables font hinting.
     *
     * @see #setHinting(int)
     */
    public static final int HINTING_OFF = 0x0;

    
Font hinter option that enables font hinting.
See Also:
setHinting(int)/**
     * Font hinter option that enables font hinting.
     *
     * @see #setHinting(int)
     */
    public static final int HINTING_ON = 0x1;

    
Bidi flag to set LTR paragraph direction.
@hide
/**
     * Bidi flag to set LTR paragraph direction.
     *
     * @hide
     */
    public static final int BIDI_LTR = 0x0;

    
Bidi flag to set RTL paragraph direction.
@hide
/**
     * Bidi flag to set RTL paragraph direction.
     *
     * @hide
     */
    public static final int BIDI_RTL = 0x1;

    
Bidi flag to detect paragraph direction via heuristics, defaulting to
LTR.
@hide
/**
     * Bidi flag to detect paragraph direction via heuristics, defaulting to
     * LTR.
     *
     * @hide
     */
    public static final int BIDI_DEFAULT_LTR = 0x2;

    
Bidi flag to detect paragraph direction via heuristics, defaulting to
RTL.
@hide
/**
     * Bidi flag to detect paragraph direction via heuristics, defaulting to
     * RTL.
     *
     * @hide
     */
    public static final int BIDI_DEFAULT_RTL = 0x3;

    
Bidi flag to override direction to all LTR (ignore bidi).
@hide
/**
     * Bidi flag to override direction to all LTR (ignore bidi).
     *
     * @hide
     */
    public static final int BIDI_FORCE_LTR = 0x4;

    
Bidi flag to override direction to all RTL (ignore bidi).
@hide
/**
     * Bidi flag to override direction to all RTL (ignore bidi).
     *
     * @hide
     */
    public static final int BIDI_FORCE_RTL = 0x5;

    
Maximum Bidi flag value.
@hide
/**
     * Maximum Bidi flag value.
     * @hide
     */
    private static final int BIDI_MAX_FLAG_VALUE = BIDI_FORCE_RTL;

    
Mask for bidi flags.
@hide
/**
     * Mask for bidi flags.
     * @hide
     */
    private static final int BIDI_FLAG_MASK = 0x7;

    
Flag for getTextRunAdvances indicating left-to-right run direction.
@hide
/**
     * Flag for getTextRunAdvances indicating left-to-right run direction.
     * @hide
     */
    public static final int DIRECTION_LTR = 0;

    
Flag for getTextRunAdvances indicating right-to-left run direction.
@hide
/**
     * Flag for getTextRunAdvances indicating right-to-left run direction.
     * @hide
     */
    public static final int DIRECTION_RTL = 1;

    
Option for getTextRunCursor to compute the valid cursor after
offset or the limit of the context, whichever is less.
@hide
/**
     * Option for getTextRunCursor to compute the valid cursor after
     * offset or the limit of the context, whichever is less.
     * @hide
     */
    public static final int CURSOR_AFTER = 0;

    
Option for getTextRunCursor to compute the valid cursor at or after
the offset or the limit of the context, whichever is less.
@hide
/**
     * Option for getTextRunCursor to compute the valid cursor at or after
     * the offset or the limit of the context, whichever is less.
     * @hide
     */
    public static final int CURSOR_AT_OR_AFTER = 1;

     
Option for getTextRunCursor to compute the valid cursor before
offset or the start of the context, whichever is greater.
@hide
/**
     * Option for getTextRunCursor to compute the valid cursor before
     * offset or the start of the context, whichever is greater.
     * @hide
     */
    public static final int CURSOR_BEFORE = 2;

   
Option for getTextRunCursor to compute the valid cursor at or before
offset or the start of the context, whichever is greater.
@hide
/**
     * Option for getTextRunCursor to compute the valid cursor at or before
     * offset or the start of the context, whichever is greater.
     * @hide
     */
    public static final int CURSOR_AT_OR_BEFORE = 3;

    
Option for getTextRunCursor to return offset if the cursor at offset
is valid, or -1 if it isn't.
@hide
/**
     * Option for getTextRunCursor to return offset if the cursor at offset
     * is valid, or -1 if it isn't.
     * @hide
     */
    public static final int CURSOR_AT = 4;

    
Maximum cursor option value.
/**
     * Maximum cursor option value.
     */
    private static final int CURSOR_OPT_MAX_VALUE = CURSOR_AT;

    
Mask for hyphen edits that happen at the end of a line. Keep in sync with the definition in
Minikin's Hyphenator.h.
@hide
/**
     * Mask for hyphen edits that happen at the end of a line. Keep in sync with the definition in
     * Minikin's Hyphenator.h.
     * @hide
     */
    public static final int HYPHENEDIT_MASK_END_OF_LINE = 0x07;

    
Mask for hyphen edits that happen at the start of a line. Keep in sync with the definition in
Minikin's Hyphenator.h.
@hide
/**
     * Mask for hyphen edits that happen at the start of a line. Keep in sync with the definition in
     * Minikin's Hyphenator.h.
     * @hide
     */
    public static final int HYPHENEDIT_MASK_START_OF_LINE = 0x03 << 3;

    
The Style specifies if the primitive being drawn is filled, stroked, or
both (in the same color). The default is FILL.
/**
     * The Style specifies if the primitive being drawn is filled, stroked, or
     * both (in the same color). The default is FILL.
     */
    public enum Style {
        
Geometry and text drawn with this style will be filled, ignoring all
stroke-related settings in the paint.
/**
         * Geometry and text drawn with this style will be filled, ignoring all
         * stroke-related settings in the paint.
         */
        FILL            (0),
        
Geometry and text drawn with this style will be stroked, respecting
the stroke-related fields on the paint.
/**
         * Geometry and text drawn with this style will be stroked, respecting
         * the stroke-related fields on the paint.
         */
        STROKE          (1),
        
Geometry and text drawn with this style will be both filled and
stroked at the same time, respecting the stroke-related fields on
the paint. This mode can give unexpected results if the geometry
is oriented counter-clockwise. This restriction does not apply to
either FILL or STROKE.
/**
         * Geometry and text drawn with this style will be both filled and
         * stroked at the same time, respecting the stroke-related fields on
         * the paint. This mode can give unexpected results if the geometry
         * is oriented counter-clockwise. This restriction does not apply to
         * either FILL or STROKE.
         */
        FILL_AND_STROKE (2);

        Style(int nativeInt) {
            this.nativeInt = nativeInt;
        }
        final int nativeInt;
    }

    
The Cap specifies the treatment for the beginning and ending of
stroked lines and paths. The default is BUTT.
/**
     * The Cap specifies the treatment for the beginning and ending of
     * stroked lines and paths. The default is BUTT.
     */
    public enum Cap {
        
The stroke ends with the path, and does not project beyond it.
/**
         * The stroke ends with the path, and does not project beyond it.
         */
        BUTT    (0),
        
The stroke projects out as a semicircle, with the center at the
end of the path.
/**
         * The stroke projects out as a semicircle, with the center at the
         * end of the path.
         */
        ROUND   (1),
        
The stroke projects out as a square, with the center at the end
of the path.
/**
         * The stroke projects out as a square, with the center at the end
         * of the path.
         */
        SQUARE  (2);

        private Cap(int nativeInt) {
            this.nativeInt = nativeInt;
        }
        final int nativeInt;
    }

    
The Join specifies the treatment where lines and curve segments
join on a stroked path. The default is MITER.
/**
     * The Join specifies the treatment where lines and curve segments
     * join on a stroked path. The default is MITER.
     */
    public enum Join {
        
The outer edges of a join meet at a sharp angle
/**
         * The outer edges of a join meet at a sharp angle
         */
        MITER   (0),
        
The outer edges of a join meet in a circular arc.
/**
         * The outer edges of a join meet in a circular arc.
         */
        ROUND   (1),
        
The outer edges of a join meet with a straight line
/**
         * The outer edges of a join meet with a straight line
         */
        BEVEL   (2);

        private Join(int nativeInt) {
            this.nativeInt = nativeInt;
        }
        final int nativeInt;
    }

    
Align specifies how drawText aligns its text relative to the
[x,y] coordinates. The default is LEFT.
/**
     * Align specifies how drawText aligns its text relative to the
     * [x,y] coordinates. The default is LEFT.
     */
    public enum Align {
        
The text is drawn to the right of the x,y origin
/**
         * The text is drawn to the right of the x,y origin
         */
        LEFT    (0),
        
The text is drawn centered horizontally on the x,y origin
/**
         * The text is drawn centered horizontally on the x,y origin
         */
        CENTER  (1),
        
The text is drawn to the left of the x,y origin
/**
         * The text is drawn to the left of the x,y origin
         */
        RIGHT   (2);

        private Align(int nativeInt) {
            this.nativeInt = nativeInt;
        }
        final int nativeInt;
    }

    
Create a new paint with default settings.
/**
     * Create a new paint with default settings.
     */
    public Paint() {
        this(0);
    }

    
Create a new paint with the specified flags. Use setFlags() to change
these after the paint is created.
Params:
flags – initial flag bits, as if they were passed via setFlags()./**
     * Create a new paint with the specified flags. Use setFlags() to change
     * these after the paint is created.
     *
     * @param flags initial flag bits, as if they were passed via setFlags().
     */
    public Paint(int flags) {
        mNativePaint = nInit();
        NoImagePreloadHolder.sRegistry.registerNativeAllocation(this, mNativePaint);
        setFlags(flags | HIDDEN_DEFAULT_PAINT_FLAGS);
        // TODO: Turning off hinting has undesirable side effects, we need to
        //       revisit hinting once we add support for subpixel positioning
        // setHinting(DisplayMetrics.DENSITY_DEVICE >= DisplayMetrics.DENSITY_TV
        //        ? HINTING_OFF : HINTING_ON);
        mCompatScaling = mInvCompatScaling = 1;
        setTextLocales(LocaleList.getAdjustedDefault());
    }

    
Create a new paint, initialized with the attributes in the specified
paint parameter.
Params:
paint – Existing paint used to initialized the attributes of the
             new paint./**
     * Create a new paint, initialized with the attributes in the specified
     * paint parameter.
     *
     * @param paint Existing paint used to initialized the attributes of the
     *              new paint.
     */
    public Paint(Paint paint) {
        mNativePaint = nInitWithPaint(paint.getNativeInstance());
        NoImagePreloadHolder.sRegistry.registerNativeAllocation(this, mNativePaint);
        setClassVariablesFrom(paint);
    }

    
Restores the paint to its default settings. /** Restores the paint to its default settings. */
    public void reset() {
        nReset(mNativePaint);
        setFlags(HIDDEN_DEFAULT_PAINT_FLAGS);

        // TODO: Turning off hinting has undesirable side effects, we need to
        //       revisit hinting once we add support for subpixel positioning
        // setHinting(DisplayMetrics.DENSITY_DEVICE >= DisplayMetrics.DENSITY_TV
        //        ? HINTING_OFF : HINTING_ON);

        mColorFilter = null;
        mMaskFilter = null;
        mPathEffect = null;
        mShader = null;
        mNativeShader = 0;
        mTypeface = null;
        mXfermode = null;

        mHasCompatScaling = false;
        mCompatScaling = 1;
        mInvCompatScaling = 1;

        mBidiFlags = BIDI_DEFAULT_LTR;
        setTextLocales(LocaleList.getAdjustedDefault());
        setElegantTextHeight(false);
        mFontFeatureSettings = null;
        mFontVariationSettings = null;

        mShadowLayerRadius = 0.0f;
        mShadowLayerDx = 0.0f;
        mShadowLayerDy = 0.0f;
        mShadowLayerColor = 0;
    }

    
Copy the fields from src into this paint. This is equivalent to calling
get() on all of the src fields, and calling the corresponding set()
methods on this.
/**
     * Copy the fields from src into this paint. This is equivalent to calling
     * get() on all of the src fields, and calling the corresponding set()
     * methods on this.
     */
    public void set(Paint src) {
        if (this != src) {
            // copy over the native settings
            nSet(mNativePaint, src.mNativePaint);
            setClassVariablesFrom(src);
        }
    }

    
Set all class variables using current values from the given Paint. /**
     * Set all class variables using current values from the given
     * {@link Paint}.
     */
    private void setClassVariablesFrom(Paint paint) {
        mColorFilter = paint.mColorFilter;
        mMaskFilter = paint.mMaskFilter;
        mPathEffect = paint.mPathEffect;
        mShader = paint.mShader;
        mNativeShader = paint.mNativeShader;
        mTypeface = paint.mTypeface;
        mXfermode = paint.mXfermode;

        mHasCompatScaling = paint.mHasCompatScaling;
        mCompatScaling = paint.mCompatScaling;
        mInvCompatScaling = paint.mInvCompatScaling;

        mBidiFlags = paint.mBidiFlags;
        mLocales = paint.mLocales;
        mFontFeatureSettings = paint.mFontFeatureSettings;
        mFontVariationSettings = paint.mFontVariationSettings;

        mShadowLayerRadius = paint.mShadowLayerRadius;
        mShadowLayerDx = paint.mShadowLayerDx;
        mShadowLayerDy = paint.mShadowLayerDy;
        mShadowLayerColor = paint.mShadowLayerColor;
    }

    
Returns true if all attributes are equal.
The caller is expected to have checked the trivial cases, like the pointers being equal,
the objects having different classes, or the parameter being null.
@hide
/**
     * Returns true if all attributes are equal.
     *
     * The caller is expected to have checked the trivial cases, like the pointers being equal,
     * the objects having different classes, or the parameter being null.
     * @hide
     */
    public boolean hasEqualAttributes(@NonNull Paint other) {
        return mColorFilter == other.mColorFilter
                && mMaskFilter == other.mMaskFilter
                && mPathEffect == other.mPathEffect
                && mShader == other.mShader
                && mTypeface == other.mTypeface
                && mXfermode == other.mXfermode
                && mHasCompatScaling == other.mHasCompatScaling
                && mCompatScaling == other.mCompatScaling
                && mInvCompatScaling == other.mInvCompatScaling
                && mBidiFlags == other.mBidiFlags
                && mLocales.equals(other.mLocales)
                && TextUtils.equals(mFontFeatureSettings, other.mFontFeatureSettings)
                && TextUtils.equals(mFontVariationSettings, other.mFontVariationSettings)
                && mShadowLayerRadius == other.mShadowLayerRadius
                && mShadowLayerDx == other.mShadowLayerDx
                && mShadowLayerDy == other.mShadowLayerDy
                && mShadowLayerColor == other.mShadowLayerColor
                && getFlags() == other.getFlags()
                && getHinting() == other.getHinting()
                && getStyle() == other.getStyle()
                && getColor() == other.getColor()
                && getStrokeWidth() == other.getStrokeWidth()
                && getStrokeMiter() == other.getStrokeMiter()
                && getStrokeCap() == other.getStrokeCap()
                && getStrokeJoin() == other.getStrokeJoin()
                && getTextAlign() == other.getTextAlign()
                && isElegantTextHeight() == other.isElegantTextHeight()
                && getTextSize() == other.getTextSize()
                && getTextScaleX() == other.getTextScaleX()
                && getTextSkewX() == other.getTextSkewX()
                && getLetterSpacing() == other.getLetterSpacing()
                && getWordSpacing() == other.getWordSpacing()
                && getHyphenEdit() == other.getHyphenEdit();
    }

    
@hide
/** @hide */
    public void setCompatibilityScaling(float factor) {
        if (factor == 1.0) {
            mHasCompatScaling = false;
            mCompatScaling = mInvCompatScaling = 1.0f;
        } else {
            mHasCompatScaling = true;
            mCompatScaling = factor;
            mInvCompatScaling = 1.0f/factor;
        }
    }

    
Return the pointer to the native object while ensuring that any
mutable objects that are attached to the paint are also up-to-date.
@hide
/**
     * Return the pointer to the native object while ensuring that any
     * mutable objects that are attached to the paint are also up-to-date.
     *
     * @hide
     */
    public long getNativeInstance() {
        long newNativeShader = mShader == null ? 0 : mShader.getNativeInstance();
        if (newNativeShader != mNativeShader) {
            mNativeShader = newNativeShader;
            nSetShader(mNativePaint, mNativeShader);
        }
        long newNativeColorFilter = mColorFilter == null ? 0 : mColorFilter.getNativeInstance();
        if (newNativeColorFilter != mNativeColorFilter) {
            mNativeColorFilter = newNativeColorFilter;
            nSetColorFilter(mNativePaint, mNativeColorFilter);
        }
        return mNativePaint;
    }

    
Return the bidi flags on the paint.
Returns:
the bidi flags on the paint
@hide
/**
     * Return the bidi flags on the paint.
     *
     * @return the bidi flags on the paint
     * @hide
     */
    public int getBidiFlags() {
        return mBidiFlags;
    }

    
Set the bidi flags on the paint.
@hide
/**
     * Set the bidi flags on the paint.
     * @hide
     */
    public void setBidiFlags(int flags) {
        // only flag value is the 3-bit BIDI control setting
        flags &= BIDI_FLAG_MASK;
        if (flags > BIDI_MAX_FLAG_VALUE) {
            throw new IllegalArgumentException("unknown bidi flag: " + flags);
        }
        mBidiFlags = flags;
    }

    
Return the paint's flags. Use the Flag enum to test flag values.
Returns:
the paint's flags (see enums ending in _Flag for bit masks)/**
     * Return the paint's flags. Use the Flag enum to test flag values.
     *
     * @return the paint's flags (see enums ending in _Flag for bit masks)
     */
    public int getFlags() {
        return nGetFlags(mNativePaint);
    }

    
Set the paint's flags. Use the Flag enum to specific flag values.
Params:
flags – The new flag bits for the paint/**
     * Set the paint's flags. Use the Flag enum to specific flag values.
     *
     * @param flags The new flag bits for the paint
     */
    public void setFlags(int flags) {
        nSetFlags(mNativePaint, flags);
    }

    
Return the paint's hinting mode. Returns either HINTING_OFF or HINTING_ON. /**
     * Return the paint's hinting mode.  Returns either
     * {@link #HINTING_OFF} or {@link #HINTING_ON}.
     */
    public int getHinting() {
        return nGetHinting(mNativePaint);
    }

    
Set the paint's hinting mode. May be either HINTING_OFF or HINTING_ON. /**
     * Set the paint's hinting mode.  May be either
     * {@link #HINTING_OFF} or {@link #HINTING_ON}.
     */
    public void setHinting(int mode) {
        nSetHinting(mNativePaint, mode);
    }

    
Helper for getFlags(), returning true if ANTI_ALIAS_FLAG bit is set
AntiAliasing smooths out the edges of what is being drawn, but is has
no impact on the interior of the shape. See setDither() and
setFilterBitmap() to affect how colors are treated.
Returns:
true if the antialias bit is set in the paint's flags./**
     * Helper for getFlags(), returning true if ANTI_ALIAS_FLAG bit is set
     * AntiAliasing smooths out the edges of what is being drawn, but is has
     * no impact on the interior of the shape. See setDither() and
     * setFilterBitmap() to affect how colors are treated.
     *
     * @return true if the antialias bit is set in the paint's flags.
     */
    public final boolean isAntiAlias() {
        return (getFlags() & ANTI_ALIAS_FLAG) != 0;
    }

    
Helper for setFlags(), setting or clearing the ANTI_ALIAS_FLAG bit
AntiAliasing smooths out the edges of what is being drawn, but is has
no impact on the interior of the shape. See setDither() and
setFilterBitmap() to affect how colors are treated.
Params:
aa – true to set the antialias bit in the flags, false to clear it/**
     * Helper for setFlags(), setting or clearing the ANTI_ALIAS_FLAG bit
     * AntiAliasing smooths out the edges of what is being drawn, but is has
     * no impact on the interior of the shape. See setDither() and
     * setFilterBitmap() to affect how colors are treated.
     *
     * @param aa true to set the antialias bit in the flags, false to clear it
     */
    public void setAntiAlias(boolean aa) {
        nSetAntiAlias(mNativePaint, aa);
    }

    
Helper for getFlags(), returning true if DITHER_FLAG bit is set
Dithering affects how colors that are higher precision than the device
are down-sampled. No dithering is generally faster, but higher precision
colors are just truncated down (e.g. 8888 -> 565). Dithering tries to
distribute the error inherent in this process, to reduce the visual
artifacts.
Returns:
true if the dithering bit is set in the paint's flags./**
     * Helper for getFlags(), returning true if DITHER_FLAG bit is set
     * Dithering affects how colors that are higher precision than the device
     * are down-sampled. No dithering is generally faster, but higher precision
     * colors are just truncated down (e.g. 8888 -> 565). Dithering tries to
     * distribute the error inherent in this process, to reduce the visual
     * artifacts.
     *
     * @return true if the dithering bit is set in the paint's flags.
     */
    public final boolean isDither() {
        return (getFlags() & DITHER_FLAG) != 0;
    }

    
Helper for setFlags(), setting or clearing the DITHER_FLAG bit
Dithering affects how colors that are higher precision than the device
are down-sampled. No dithering is generally faster, but higher precision
colors are just truncated down (e.g. 8888 -> 565). Dithering tries to
distribute the error inherent in this process, to reduce the visual
artifacts.
Params:
dither – true to set the dithering bit in flags, false to clear it/**
     * Helper for setFlags(), setting or clearing the DITHER_FLAG bit
     * Dithering affects how colors that are higher precision than the device
     * are down-sampled. No dithering is generally faster, but higher precision
     * colors are just truncated down (e.g. 8888 -> 565). Dithering tries to
     * distribute the error inherent in this process, to reduce the visual
     * artifacts.
     *
     * @param dither true to set the dithering bit in flags, false to clear it
     */
    public void setDither(boolean dither) {
        nSetDither(mNativePaint, dither);
    }

    
Helper for getFlags(), returning true if LINEAR_TEXT_FLAG bit is set
Returns:
true if the lineartext bit is set in the paint's flags/**
     * Helper for getFlags(), returning true if LINEAR_TEXT_FLAG bit is set
     *
     * @return true if the lineartext bit is set in the paint's flags
     */
    public final boolean isLinearText() {
        return (getFlags() & LINEAR_TEXT_FLAG) != 0;
    }

    
Helper for setFlags(), setting or clearing the LINEAR_TEXT_FLAG bit
Params:
linearText – true to set the linearText bit in the paint's flags,
                  false to clear it./**
     * Helper for setFlags(), setting or clearing the LINEAR_TEXT_FLAG bit
     *
     * @param linearText true to set the linearText bit in the paint's flags,
     *                   false to clear it.
     */
    public void setLinearText(boolean linearText) {
        nSetLinearText(mNativePaint, linearText);
    }

    
Helper for getFlags(), returning true if SUBPIXEL_TEXT_FLAG bit is set
Returns:
true if the subpixel bit is set in the paint's flags/**
     * Helper for getFlags(), returning true if SUBPIXEL_TEXT_FLAG bit is set
     *
     * @return true if the subpixel bit is set in the paint's flags
     */
    public final boolean isSubpixelText() {
        return (getFlags() & SUBPIXEL_TEXT_FLAG) != 0;
    }

    
Helper for setFlags(), setting or clearing the SUBPIXEL_TEXT_FLAG bit
Params:
subpixelText – true to set the subpixelText bit in the paint's
                    flags, false to clear it./**
     * Helper for setFlags(), setting or clearing the SUBPIXEL_TEXT_FLAG bit
     *
     * @param subpixelText true to set the subpixelText bit in the paint's
     *                     flags, false to clear it.
     */
    public void setSubpixelText(boolean subpixelText) {
        nSetSubpixelText(mNativePaint, subpixelText);
    }

    
Helper for getFlags(), returning true if UNDERLINE_TEXT_FLAG bit is set
Returns:
true if the underlineText bit is set in the paint's flags./**
     * Helper for getFlags(), returning true if UNDERLINE_TEXT_FLAG bit is set
     *
     * @return true if the underlineText bit is set in the paint's flags.
     */
    public final boolean isUnderlineText() {
        return (getFlags() & UNDERLINE_TEXT_FLAG) != 0;
    }

    
Distance from top of the underline to the baseline. Positive values mean below the baseline.
This method returns where the underline should be drawn independent of if the underlineText
bit is set at the moment.
@hide
/**
     * Distance from top of the underline to the baseline. Positive values mean below the baseline.
     * This method returns where the underline should be drawn independent of if the underlineText
     * bit is set at the moment.
     * @hide
     */
    public float getUnderlinePosition() {
        return nGetUnderlinePosition(mNativePaint);
    }

    
@hide
/**
     * @hide
     */
    public float getUnderlineThickness() {
        return nGetUnderlineThickness(mNativePaint);
    }

    
Helper for setFlags(), setting or clearing the UNDERLINE_TEXT_FLAG bit
Params:
underlineText – true to set the underlineText bit in the paint's
                     flags, false to clear it./**
     * Helper for setFlags(), setting or clearing the UNDERLINE_TEXT_FLAG bit
     *
     * @param underlineText true to set the underlineText bit in the paint's
     *                      flags, false to clear it.
     */
    public void setUnderlineText(boolean underlineText) {
        nSetUnderlineText(mNativePaint, underlineText);
    }

    
Helper for getFlags(), returning true if STRIKE_THRU_TEXT_FLAG bit is set
Returns:
true if the strikeThruText bit is set in the paint's flags./**
     * Helper for getFlags(), returning true if STRIKE_THRU_TEXT_FLAG bit is set
     *
     * @return true if the strikeThruText bit is set in the paint's flags.
     */
    public final boolean isStrikeThruText() {
        return (getFlags() & STRIKE_THRU_TEXT_FLAG) != 0;
    }

    
Distance from top of the strike-through line to the baseline. Negative values mean above the
baseline. This method returns where the strike-through line should be drawn independent of if
the strikeThruText bit is set at the moment.
@hide
/**
     * Distance from top of the strike-through line to the baseline. Negative values mean above the
     * baseline. This method returns where the strike-through line should be drawn independent of if
     * the strikeThruText bit is set at the moment.
     * @hide
     */
    public float getStrikeThruPosition() {
        return nGetStrikeThruPosition(mNativePaint);
    }

    
@hide
/**
     * @hide
     */
    public float getStrikeThruThickness() {
        return nGetStrikeThruThickness(mNativePaint);
    }

    
Helper for setFlags(), setting or clearing the STRIKE_THRU_TEXT_FLAG bit
Params:
strikeThruText – true to set the strikeThruText bit in the paint's
                      flags, false to clear it./**
     * Helper for setFlags(), setting or clearing the STRIKE_THRU_TEXT_FLAG bit
     *
     * @param strikeThruText true to set the strikeThruText bit in the paint's
     *                       flags, false to clear it.
     */
    public void setStrikeThruText(boolean strikeThruText) {
        nSetStrikeThruText(mNativePaint, strikeThruText);
    }

    
Helper for getFlags(), returning true if FAKE_BOLD_TEXT_FLAG bit is set
Returns:
true if the fakeBoldText bit is set in the paint's flags./**
     * Helper for getFlags(), returning true if FAKE_BOLD_TEXT_FLAG bit is set
     *
     * @return true if the fakeBoldText bit is set in the paint's flags.
     */
    public final boolean isFakeBoldText() {
        return (getFlags() & FAKE_BOLD_TEXT_FLAG) != 0;
    }

    
Helper for setFlags(), setting or clearing the FAKE_BOLD_TEXT_FLAG bit
Params:
fakeBoldText – true to set the fakeBoldText bit in the paint's
                    flags, false to clear it./**
     * Helper for setFlags(), setting or clearing the FAKE_BOLD_TEXT_FLAG bit
     *
     * @param fakeBoldText true to set the fakeBoldText bit in the paint's
     *                     flags, false to clear it.
     */
    public void setFakeBoldText(boolean fakeBoldText) {
        nSetFakeBoldText(mNativePaint, fakeBoldText);
    }

    
Whether or not the bitmap filter is activated.
Filtering affects the sampling of bitmaps when they are transformed.
Filtering does not affect how the colors in the bitmap are converted into
device pixels. That is dependent on dithering and xfermodes.
See Also:
setFilterBitmap()/**
     * Whether or not the bitmap filter is activated.
     * Filtering affects the sampling of bitmaps when they are transformed.
     * Filtering does not affect how the colors in the bitmap are converted into
     * device pixels. That is dependent on dithering and xfermodes.
     *
     * @see #setFilterBitmap(boolean) setFilterBitmap()
     */
    public final boolean isFilterBitmap() {
        return (getFlags() & FILTER_BITMAP_FLAG) != 0;
    }

    
Helper for setFlags(), setting or clearing the FILTER_BITMAP_FLAG bit.
Filtering affects the sampling of bitmaps when they are transformed.
Filtering does not affect how the colors in the bitmap are converted into
device pixels. That is dependent on dithering and xfermodes.
Params:
filter – true to set the FILTER_BITMAP_FLAG bit in the paint's
              flags, false to clear it./**
     * Helper for setFlags(), setting or clearing the FILTER_BITMAP_FLAG bit.
     * Filtering affects the sampling of bitmaps when they are transformed.
     * Filtering does not affect how the colors in the bitmap are converted into
     * device pixels. That is dependent on dithering and xfermodes.
     *
     * @param filter true to set the FILTER_BITMAP_FLAG bit in the paint's
     *               flags, false to clear it.
     */
    public void setFilterBitmap(boolean filter) {
        nSetFilterBitmap(mNativePaint, filter);
    }

    
Return the paint's style, used for controlling how primitives'
geometries are interpreted (except for drawBitmap, which always assumes
FILL_STYLE).
Returns:
the paint's style setting (Fill, Stroke, StrokeAndFill)/**
     * Return the paint's style, used for controlling how primitives'
     * geometries are interpreted (except for drawBitmap, which always assumes
     * FILL_STYLE).
     *
     * @return the paint's style setting (Fill, Stroke, StrokeAndFill)
     */
    public Style getStyle() {
        return sStyleArray[nGetStyle(mNativePaint)];
    }

    
Set the paint's style, used for controlling how primitives'
geometries are interpreted (except for drawBitmap, which always assumes
Fill).
Params:
style – The new style to set in the paint/**
     * Set the paint's style, used for controlling how primitives'
     * geometries are interpreted (except for drawBitmap, which always assumes
     * Fill).
     *
     * @param style The new style to set in the paint
     */
    public void setStyle(Style style) {
        nSetStyle(mNativePaint, style.nativeInt);
    }

    
Return the paint's color. Note that the color is a 32bit value
containing alpha as well as r,g,b. This 32bit value is not premultiplied,
meaning that its alpha can be any value, regardless of the values of
r,g,b. See the Color class for more details.
Returns:
the paint's color (and alpha)./**
     * Return the paint's color. Note that the color is a 32bit value
     * containing alpha as well as r,g,b. This 32bit value is not premultiplied,
     * meaning that its alpha can be any value, regardless of the values of
     * r,g,b. See the Color class for more details.
     *
     * @return the paint's color (and alpha).
     */
    @ColorInt
    public int getColor() {
        return nGetColor(mNativePaint);
    }

    
Set the paint's color. Note that the color is an int containing alpha
as well as r,g,b. This 32bit value is not premultiplied, meaning that
its alpha can be any value, regardless of the values of r,g,b.
See the Color class for more details.
Params:
color – The new color (including alpha) to set in the paint./**
     * Set the paint's color. Note that the color is an int containing alpha
     * as well as r,g,b. This 32bit value is not premultiplied, meaning that
     * its alpha can be any value, regardless of the values of r,g,b.
     * See the Color class for more details.
     *
     * @param color The new color (including alpha) to set in the paint.
     */
    public void setColor(@ColorInt int color) {
        nSetColor(mNativePaint, color);
    }

    
Helper to getColor() that just returns the color's alpha value. This is
the same as calling getColor() >>> 24. It always returns a value between
0 (completely transparent) and 255 (completely opaque).
Returns:
the alpha component of the paint's color./**
     * Helper to getColor() that just returns the color's alpha value. This is
     * the same as calling getColor() >>> 24. It always returns a value between
     * 0 (completely transparent) and 255 (completely opaque).
     *
     * @return the alpha component of the paint's color.
     */
    public int getAlpha() {
        return nGetAlpha(mNativePaint);
    }

    
Helper to setColor(), that only assigns the color's alpha value,
leaving its r,g,b values unchanged. Results are undefined if the alpha
value is outside of the range [0..255]
Params:
a – set the alpha component [0..255] of the paint's color./**
     * Helper to setColor(), that only assigns the color's alpha value,
     * leaving its r,g,b values unchanged. Results are undefined if the alpha
     * value is outside of the range [0..255]
     *
     * @param a set the alpha component [0..255] of the paint's color.
     */
    public void setAlpha(int a) {
        nSetAlpha(mNativePaint, a);
    }

    
Helper to setColor(), that takes a,r,g,b and constructs the color int
Params:
a – The new alpha component (0..255) of the paint's color.
r – The new red component (0..255) of the paint's color.
g – The new green component (0..255) of the paint's color.
b – The new blue component (0..255) of the paint's color./**
     * Helper to setColor(), that takes a,r,g,b and constructs the color int
     *
     * @param a The new alpha component (0..255) of the paint's color.
     * @param r The new red component (0..255) of the paint's color.
     * @param g The new green component (0..255) of the paint's color.
     * @param b The new blue component (0..255) of the paint's color.
     */
    public void setARGB(int a, int r, int g, int b) {
        setColor((a << 24) | (r << 16) | (g << 8) | b);
    }

    
Return the width for stroking.

A value of 0 strokes in hairline mode.
Hairlines always draws a single pixel independent of the canva's matrix.
Returns:
the paint's stroke width, used whenever the paint's style is
        Stroke or StrokeAndFill./**
     * Return the width for stroking.
     * <p />
     * A value of 0 strokes in hairline mode.
     * Hairlines always draws a single pixel independent of the canva's matrix.
     *
     * @return the paint's stroke width, used whenever the paint's style is
     *         Stroke or StrokeAndFill.
     */
    public float getStrokeWidth() {
        return nGetStrokeWidth(mNativePaint);
    }

    
Set the width for stroking.
Pass 0 to stroke in hairline mode.
Hairlines always draws a single pixel independent of the canva's matrix.
Params:
width – set the paint's stroke width, used whenever the paint's
             style is Stroke or StrokeAndFill./**
     * Set the width for stroking.
     * Pass 0 to stroke in hairline mode.
     * Hairlines always draws a single pixel independent of the canva's matrix.
     *
     * @param width set the paint's stroke width, used whenever the paint's
     *              style is Stroke or StrokeAndFill.
     */
    public void setStrokeWidth(float width) {
        nSetStrokeWidth(mNativePaint, width);
    }

    
Return the paint's stroke miter value. Used to control the behavior
of miter joins when the joins angle is sharp.
Returns:
the paint's miter limit, used whenever the paint's style is
        Stroke or StrokeAndFill./**
     * Return the paint's stroke miter value. Used to control the behavior
     * of miter joins when the joins angle is sharp.
     *
     * @return the paint's miter limit, used whenever the paint's style is
     *         Stroke or StrokeAndFill.
     */
    public float getStrokeMiter() {
        return nGetStrokeMiter(mNativePaint);
    }

    
Set the paint's stroke miter value. This is used to control the behavior
of miter joins when the joins angle is sharp. This value must be >= 0.
Params:
miter – set the miter limit on the paint, used whenever the paint's
             style is Stroke or StrokeAndFill./**
     * Set the paint's stroke miter value. This is used to control the behavior
     * of miter joins when the joins angle is sharp. This value must be >= 0.
     *
     * @param miter set the miter limit on the paint, used whenever the paint's
     *              style is Stroke or StrokeAndFill.
     */
    public void setStrokeMiter(float miter) {
        nSetStrokeMiter(mNativePaint, miter);
    }

    
Return the paint's Cap, controlling how the start and end of stroked
lines and paths are treated.
Returns:
the line cap style for the paint, used whenever the paint's
        style is Stroke or StrokeAndFill./**
     * Return the paint's Cap, controlling how the start and end of stroked
     * lines and paths are treated.
     *
     * @return the line cap style for the paint, used whenever the paint's
     *         style is Stroke or StrokeAndFill.
     */
    public Cap getStrokeCap() {
        return sCapArray[nGetStrokeCap(mNativePaint)];
    }

    
Set the paint's Cap.
Params:
cap – set the paint's line cap style, used whenever the paint's
           style is Stroke or StrokeAndFill./**
     * Set the paint's Cap.
     *
     * @param cap set the paint's line cap style, used whenever the paint's
     *            style is Stroke or StrokeAndFill.
     */
    public void setStrokeCap(Cap cap) {
        nSetStrokeCap(mNativePaint, cap.nativeInt);
    }

    
Return the paint's stroke join type.
Returns:
the paint's Join./**
     * Return the paint's stroke join type.
     *
     * @return the paint's Join.
     */
    public Join getStrokeJoin() {
        return sJoinArray[nGetStrokeJoin(mNativePaint)];
    }

    
Set the paint's Join.
Params:
join – set the paint's Join, used whenever the paint's style is
            Stroke or StrokeAndFill./**
     * Set the paint's Join.
     *
     * @param join set the paint's Join, used whenever the paint's style is
     *             Stroke or StrokeAndFill.
     */
    public void setStrokeJoin(Join join) {
        nSetStrokeJoin(mNativePaint, join.nativeInt);
    }

    
Applies any/all effects (patheffect, stroking) to src, returning the
result in dst. The result is that drawing src with this paint will be
the same as drawing dst with a default paint (at least from the
geometric perspective).
Params:
src – input path
dst – output path (may be the same as src)
Returns:
   true if the path should be filled, or false if it should be
                drawn with a hairline (width == 0)/**
     * Applies any/all effects (patheffect, stroking) to src, returning the
     * result in dst. The result is that drawing src with this paint will be
     * the same as drawing dst with a default paint (at least from the
     * geometric perspective).
     *
     * @param src input path
     * @param dst output path (may be the same as src)
     * @return    true if the path should be filled, or false if it should be
     *                 drawn with a hairline (width == 0)
     */
    public boolean getFillPath(Path src, Path dst) {
        return nGetFillPath(mNativePaint, src.readOnlyNI(), dst.mutateNI());
    }

    
Get the paint's shader object.
Returns:
the paint's shader (or null)/**
     * Get the paint's shader object.
     *
     * @return the paint's shader (or null)
     */
    public Shader getShader() {
        return mShader;
    }

    
Set or clear the shader object.

Pass null to clear any previous shader.
As a convenience, the parameter passed is also returned.
Params:
shader – May be null. the new shader to be installed in the paint
Returns:
      shader/**
     * Set or clear the shader object.
     * <p />
     * Pass null to clear any previous shader.
     * As a convenience, the parameter passed is also returned.
     *
     * @param shader May be null. the new shader to be installed in the paint
     * @return       shader
     */
    public Shader setShader(Shader shader) {
        // If mShader changes, cached value of native shader aren't valid, since
        // old shader's pointer may be reused by another shader allocation later
        if (mShader != shader) {
            mNativeShader = -1;
            // Release any native references to the old shader content
            nSetShader(mNativePaint, 0);
        }
        // Defer setting the shader natively until getNativeInstance() is called
        mShader = shader;
        return shader;
    }

    
Get the paint's colorfilter (maybe be null).
Returns:
the paint's colorfilter (maybe be null)/**
     * Get the paint's colorfilter (maybe be null).
     *
     * @return the paint's colorfilter (maybe be null)
     */
    public ColorFilter getColorFilter() {
        return mColorFilter;
    }

    
Set or clear the paint's colorfilter, returning the parameter.
Params:
filter – May be null. The new filter to be installed in the paint
Returns:
      filter/**
     * Set or clear the paint's colorfilter, returning the parameter.
     *
     * @param filter May be null. The new filter to be installed in the paint
     * @return       filter
     */
    public ColorFilter setColorFilter(ColorFilter filter) {
        // If mColorFilter changes, cached value of native shader aren't valid, since
        // old shader's pointer may be reused by another shader allocation later
        if (mColorFilter != filter) {
            mNativeColorFilter = -1;
        }

        // Defer setting the filter natively until getNativeInstance() is called
        mColorFilter = filter;
        return filter;
    }

    
Get the paint's transfer mode object.
Returns:
the paint's transfer mode (or null)/**
     * Get the paint's transfer mode object.
     *
     * @return the paint's transfer mode (or null)
     */
    public Xfermode getXfermode() {
        return mXfermode;
    }

    
Set or clear the transfer mode object. A transfer mode defines how
source pixels (generate by a drawing command) are composited with
the destination pixels (content of the render target).

Pass null to clear any previous transfer mode.
As a convenience, the parameter passed is also returned.
 PorterDuffXfermode is the most common transfer mode. 
Params:
xfermode – May be null. The xfermode to be installed in the paint
Returns:
        xfermode/**
     * Set or clear the transfer mode object. A transfer mode defines how
     * source pixels (generate by a drawing command) are composited with
     * the destination pixels (content of the render target).
     * <p />
     * Pass null to clear any previous transfer mode.
     * As a convenience, the parameter passed is also returned.
     * <p />
     * {@link PorterDuffXfermode} is the most common transfer mode.
     *
     * @param xfermode May be null. The xfermode to be installed in the paint
     * @return         xfermode
     */
    public Xfermode setXfermode(Xfermode xfermode) {
        int newMode = xfermode != null ? xfermode.porterDuffMode : Xfermode.DEFAULT;
        int curMode = mXfermode != null ? mXfermode.porterDuffMode : Xfermode.DEFAULT;
        if (newMode != curMode) {
            nSetXfermode(mNativePaint, newMode);
        }
        mXfermode = xfermode;
        return xfermode;
    }

    
Get the paint's patheffect object.
Returns:
the paint's patheffect (or null)/**
     * Get the paint's patheffect object.
     *
     * @return the paint's patheffect (or null)
     */
    public PathEffect getPathEffect() {
        return mPathEffect;
    }

    
Set or clear the patheffect object.

Pass null to clear any previous patheffect.
As a convenience, the parameter passed is also returned.
Params:
effect – May be null. The patheffect to be installed in the paint
Returns:
      effect/**
     * Set or clear the patheffect object.
     * <p />
     * Pass null to clear any previous patheffect.
     * As a convenience, the parameter passed is also returned.
     *
     * @param effect May be null. The patheffect to be installed in the paint
     * @return       effect
     */
    public PathEffect setPathEffect(PathEffect effect) {
        long effectNative = 0;
        if (effect != null) {
            effectNative = effect.native_instance;
        }
        nSetPathEffect(mNativePaint, effectNative);
        mPathEffect = effect;
        return effect;
    }

    
Get the paint's maskfilter object.
Returns:
the paint's maskfilter (or null)/**
     * Get the paint's maskfilter object.
     *
     * @return the paint's maskfilter (or null)
     */
    public MaskFilter getMaskFilter() {
        return mMaskFilter;
    }

    
Set or clear the maskfilter object.

Pass null to clear any previous maskfilter.
As a convenience, the parameter passed is also returned.
Params:
maskfilter – May be null. The maskfilter to be installed in the
                  paint
Returns:
          maskfilter/**
     * Set or clear the maskfilter object.
     * <p />
     * Pass null to clear any previous maskfilter.
     * As a convenience, the parameter passed is also returned.
     *
     * @param maskfilter May be null. The maskfilter to be installed in the
     *                   paint
     * @return           maskfilter
     */
    public MaskFilter setMaskFilter(MaskFilter maskfilter) {
        long maskfilterNative = 0;
        if (maskfilter != null) {
            maskfilterNative = maskfilter.native_instance;
        }
        nSetMaskFilter(mNativePaint, maskfilterNative);
        mMaskFilter = maskfilter;
        return maskfilter;
    }

    
Get the paint's typeface object.

The typeface object identifies which font to use when drawing or
measuring text.
Returns:
the paint's typeface (or null)/**
     * Get the paint's typeface object.
     * <p />
     * The typeface object identifies which font to use when drawing or
     * measuring text.
     *
     * @return the paint's typeface (or null)
     */
    public Typeface getTypeface() {
        return mTypeface;
    }

    
Set or clear the typeface object.

Pass null to clear any previous typeface.
As a convenience, the parameter passed is also returned.
Params:
typeface – May be null. The typeface to be installed in the paint
Returns:
        typeface/**
     * Set or clear the typeface object.
     * <p />
     * Pass null to clear any previous typeface.
     * As a convenience, the parameter passed is also returned.
     *
     * @param typeface May be null. The typeface to be installed in the paint
     * @return         typeface
     */
    public Typeface setTypeface(Typeface typeface) {
        final long typefaceNative = typeface == null ? 0 : typeface.native_instance;
        nSetTypeface(mNativePaint, typefaceNative);
        mTypeface = typeface;
        return typeface;
    }

    
Get the paint's rasterizer (or null).

The raster controls/modifies how paths/text are turned into alpha masks.
Returns:
        the paint's rasterizer (or null)
Deprecated:
Rasterizer is not supported by either the HW or PDF backends.
@removed
/**
     * Get the paint's rasterizer (or null).
     * <p />
     * The raster controls/modifies how paths/text are turned into alpha masks.
     *
     * @return         the paint's rasterizer (or null)
     *
     * @deprecated Rasterizer is not supported by either the HW or PDF backends.
     * @removed
     */
    @Deprecated
    public Rasterizer getRasterizer() {
        return null;
    }

    
Set or clear the rasterizer object.

Pass null to clear any previous rasterizer.
As a convenience, the parameter passed is also returned.
Params:
rasterizer – May be null. The new rasterizer to be installed in
                  the paint.
Returns:
          rasterizer
Deprecated:
Rasterizer is not supported by either the HW or PDF backends.
@removed
/**
     * Set or clear the rasterizer object.
     * <p />
     * Pass null to clear any previous rasterizer.
     * As a convenience, the parameter passed is also returned.
     *
     * @param rasterizer May be null. The new rasterizer to be installed in
     *                   the paint.
     * @return           rasterizer
     *
     * @deprecated Rasterizer is not supported by either the HW or PDF backends.
     * @removed
     */
    @Deprecated
    public Rasterizer setRasterizer(Rasterizer rasterizer) {
        return rasterizer;
    }

    
This draws a shadow layer below the main layer, with the specified
offset and color, and blur radius. If radius is 0, then the shadow
layer is removed.

Can be used to create a blurred shadow underneath text. Support for use
with other drawing operations is constrained to the software rendering
pipeline.

The alpha of the shadow will be the paint's alpha if the shadow color is
opaque, or the alpha from the shadow color if not.
/**
     * This draws a shadow layer below the main layer, with the specified
     * offset and color, and blur radius. If radius is 0, then the shadow
     * layer is removed.
     * <p>
     * Can be used to create a blurred shadow underneath text. Support for use
     * with other drawing operations is constrained to the software rendering
     * pipeline.
     * <p>
     * The alpha of the shadow will be the paint's alpha if the shadow color is
     * opaque, or the alpha from the shadow color if not.
     */
    public void setShadowLayer(float radius, float dx, float dy, int shadowColor) {
      mShadowLayerRadius = radius;
      mShadowLayerDx = dx;
      mShadowLayerDy = dy;
      mShadowLayerColor = shadowColor;
      nSetShadowLayer(mNativePaint, radius, dx, dy, shadowColor);
    }

    
Clear the shadow layer.
/**
     * Clear the shadow layer.
     */
    public void clearShadowLayer() {
        setShadowLayer(0, 0, 0, 0);
    }

    
Checks if the paint has a shadow layer attached
Returns:
true if the paint has a shadow layer attached and false otherwise
@hide
/**
     * Checks if the paint has a shadow layer attached
     *
     * @return true if the paint has a shadow layer attached and false otherwise
     * @hide
     */
    public boolean hasShadowLayer() {
        return nHasShadowLayer(mNativePaint);
    }

    
Return the paint's Align value for drawing text. This controls how the
text is positioned relative to its origin. LEFT align means that all of
the text will be drawn to the right of its origin (i.e. the origin
specifieds the LEFT edge of the text) and so on.
Returns:
the paint's Align value for drawing text./**
     * Return the paint's Align value for drawing text. This controls how the
     * text is positioned relative to its origin. LEFT align means that all of
     * the text will be drawn to the right of its origin (i.e. the origin
     * specifieds the LEFT edge of the text) and so on.
     *
     * @return the paint's Align value for drawing text.
     */
    public Align getTextAlign() {
        return sAlignArray[nGetTextAlign(mNativePaint)];
    }

    
Set the paint's text alignment. This controls how the
text is positioned relative to its origin. LEFT align means that all of
the text will be drawn to the right of its origin (i.e. the origin
specifieds the LEFT edge of the text) and so on.
Params:
align – set the paint's Align value for drawing text./**
     * Set the paint's text alignment. This controls how the
     * text is positioned relative to its origin. LEFT align means that all of
     * the text will be drawn to the right of its origin (i.e. the origin
     * specifieds the LEFT edge of the text) and so on.
     *
     * @param align set the paint's Align value for drawing text.
     */
    public void setTextAlign(Align align) {
        nSetTextAlign(mNativePaint, align.nativeInt);
    }

    
Get the text's primary Locale. Note that this is not all of the locale-related information Paint has. Use getTextLocales() to get the complete list. 
Returns:
the paint's primary Locale used for drawing text, never null./**
     * Get the text's primary Locale. Note that this is not all of the locale-related information
     * Paint has. Use {@link #getTextLocales()} to get the complete list.
     *
     * @return the paint's primary Locale used for drawing text, never null.
     */
    @NonNull
    public Locale getTextLocale() {
        return mLocales.get(0);
    }

    
Get the text locale list.
Returns:
the paint's LocaleList used for drawing text, never null or empty./**
     * Get the text locale list.
     *
     * @return the paint's LocaleList used for drawing text, never null or empty.
     */
    @NonNull @Size(min=1)
    public LocaleList getTextLocales() {
        return mLocales;
    }

    
Set the text locale list to a one-member list consisting of just the locale. See setTextLocales(LocaleList) for how the locale list affects the way the text is drawn for some languages. 
Params:
locale – the paint's locale value for drawing text, must not be null./**
     * Set the text locale list to a one-member list consisting of just the locale.
     *
     * See {@link #setTextLocales(LocaleList)} for how the locale list affects
     * the way the text is drawn for some languages.
     *
     * @param locale the paint's locale value for drawing text, must not be null.
     */
    public void setTextLocale(@NonNull Locale locale) {
        if (locale == null) {
            throw new IllegalArgumentException("locale cannot be null");
        }
        if (mLocales != null && mLocales.size() == 1 && locale.equals(mLocales.get(0))) {
            return;
        }
        mLocales = new LocaleList(locale);
        syncTextLocalesWithMinikin();
    }

    
Set the text locale list. The text locale list affects how the text is drawn for some languages. For example, if the locale list contains Locale.CHINESE or Locale.CHINA, then the text renderer will prefer to draw text using a Chinese font. Likewise, if the locale list contains Locale.JAPANESE or Locale.JAPAN, then the text renderer will prefer to draw text using a Japanese font. If the locale list contains both, the order those locales appear in the list is considered for deciding the font. This distinction is important because Chinese and Japanese text both use many of the same Unicode code points but their appearance is subtly different for each language. By default, the text locale list is initialized to a one-member list just containing the system locales. This assumes that the text to be rendered will most likely be in the user's preferred language. If the actual language or languages of the text is/are known, then they can be provided to the text renderer using this method. The text renderer may attempt to guess the language script based on the contents of the text to be drawn independent of the text locale here. Specifying the text locales just helps it do a better job in certain ambiguous cases. 
Params:
locales – the paint's locale list for drawing text, must not be null or empty./**
     * Set the text locale list.
     *
     * The text locale list affects how the text is drawn for some languages.
     *
     * For example, if the locale list contains {@link Locale#CHINESE} or {@link Locale#CHINA},
     * then the text renderer will prefer to draw text using a Chinese font. Likewise,
     * if the locale list contains {@link Locale#JAPANESE} or {@link Locale#JAPAN}, then the text
     * renderer will prefer to draw text using a Japanese font. If the locale list contains both,
     * the order those locales appear in the list is considered for deciding the font.
     *
     * This distinction is important because Chinese and Japanese text both use many
     * of the same Unicode code points but their appearance is subtly different for
     * each language.
     *
     * By default, the text locale list is initialized to a one-member list just containing the
     * system locales. This assumes that the text to be rendered will most likely be in the user's
     * preferred language.
     *
     * If the actual language or languages of the text is/are known, then they can be provided to
     * the text renderer using this method. The text renderer may attempt to guess the
     * language script based on the contents of the text to be drawn independent of
     * the text locale here. Specifying the text locales just helps it do a better
     * job in certain ambiguous cases.
     *
     * @param locales the paint's locale list for drawing text, must not be null or empty.
     */
    public void setTextLocales(@NonNull @Size(min=1) LocaleList locales) {
        if (locales == null || locales.isEmpty()) {
            throw new IllegalArgumentException("locales cannot be null or empty");
        }
        if (locales.equals(mLocales)) return;
        mLocales = locales;
        syncTextLocalesWithMinikin();
    }

    private void syncTextLocalesWithMinikin() {
        final String languageTags = mLocales.toLanguageTags();
        final Integer minikinLocaleListId;
        synchronized (sCacheLock) {
            minikinLocaleListId = sMinikinLocaleListIdCache.get(languageTags);
            if (minikinLocaleListId == null) {
                final int newID = nSetTextLocales(mNativePaint, languageTags);
                sMinikinLocaleListIdCache.put(languageTags, newID);
                return;
            }
        }
        nSetTextLocalesByMinikinLocaleListId(mNativePaint, minikinLocaleListId.intValue());
    }

    
Get the elegant metrics flag.
Returns:
true if elegant metrics are enabled for text drawing./**
     * Get the elegant metrics flag.
     *
     * @return true if elegant metrics are enabled for text drawing.
     */
    public boolean isElegantTextHeight() {
        return nIsElegantTextHeight(mNativePaint);
    }

    
Set the paint's elegant height metrics flag. This setting selects font
variants that have not been compacted to fit Latin-based vertical
metrics, and also increases top and bottom bounds to provide more space.
Params:
elegant – set the paint's elegant metrics flag for drawing text./**
     * Set the paint's elegant height metrics flag. This setting selects font
     * variants that have not been compacted to fit Latin-based vertical
     * metrics, and also increases top and bottom bounds to provide more space.
     *
     * @param elegant set the paint's elegant metrics flag for drawing text.
     */
    public void setElegantTextHeight(boolean elegant) {
        nSetElegantTextHeight(mNativePaint, elegant);
    }

    
Return the paint's text size.
Returns:
the paint's text size in pixel units./**
     * Return the paint's text size.
     *
     * @return the paint's text size in pixel units.
     */
    public float getTextSize() {
        return nGetTextSize(mNativePaint);
    }

    
Set the paint's text size. This value must be > 0
Params:
textSize – set the paint's text size in pixel units./**
     * Set the paint's text size. This value must be > 0
     *
     * @param textSize set the paint's text size in pixel units.
     */
    public void setTextSize(float textSize) {
        nSetTextSize(mNativePaint, textSize);
    }

    
Return the paint's horizontal scale factor for text. The default value
is 1.0.
Returns:
the paint's scale factor in X for drawing/measuring text/**
     * Return the paint's horizontal scale factor for text. The default value
     * is 1.0.
     *
     * @return the paint's scale factor in X for drawing/measuring text
     */
    public float getTextScaleX() {
        return nGetTextScaleX(mNativePaint);
    }

    
Set the paint's horizontal scale factor for text. The default value
is 1.0. Values > 1.0 will stretch the text wider. Values < 1.0 will
stretch the text narrower.
Params:
scaleX – set the paint's scale in X for drawing/measuring text./**
     * Set the paint's horizontal scale factor for text. The default value
     * is 1.0. Values > 1.0 will stretch the text wider. Values < 1.0 will
     * stretch the text narrower.
     *
     * @param scaleX set the paint's scale in X for drawing/measuring text.
     */
    public void setTextScaleX(float scaleX) {
        nSetTextScaleX(mNativePaint, scaleX);
    }

    
Return the paint's horizontal skew factor for text. The default value
is 0.
Returns:
        the paint's skew factor in X for drawing text./**
     * Return the paint's horizontal skew factor for text. The default value
     * is 0.
     *
     * @return         the paint's skew factor in X for drawing text.
     */
    public float getTextSkewX() {
        return nGetTextSkewX(mNativePaint);
    }

    
Set the paint's horizontal skew factor for text. The default value
is 0. For approximating oblique text, use values around -0.25.
Params:
skewX – set the paint's skew factor in X for drawing text./**
     * Set the paint's horizontal skew factor for text. The default value
     * is 0. For approximating oblique text, use values around -0.25.
     *
     * @param skewX set the paint's skew factor in X for drawing text.
     */
    public void setTextSkewX(float skewX) {
        nSetTextSkewX(mNativePaint, skewX);
    }

    
Return the paint's letter-spacing for text. The default value
is 0.
Returns:
        the paint's letter-spacing for drawing text./**
     * Return the paint's letter-spacing for text. The default value
     * is 0.
     *
     * @return         the paint's letter-spacing for drawing text.
     */
    public float getLetterSpacing() {
        return nGetLetterSpacing(mNativePaint);
    }

    
Set the paint's letter-spacing for text. The default value
is 0.  The value is in 'EM' units.  Typical values for slight
expansion will be around 0.05.  Negative values tighten text.
Params:
letterSpacing – set the paint's letter-spacing for drawing text./**
     * Set the paint's letter-spacing for text. The default value
     * is 0.  The value is in 'EM' units.  Typical values for slight
     * expansion will be around 0.05.  Negative values tighten text.
     *
     * @param letterSpacing set the paint's letter-spacing for drawing text.
     */
    public void setLetterSpacing(float letterSpacing) {
        nSetLetterSpacing(mNativePaint, letterSpacing);
    }

    
Return the paint's word-spacing for text. The default value is 0.
Returns:
the paint's word-spacing for drawing text.
@hide
/**
     * Return the paint's word-spacing for text. The default value is 0.
     *
     * @return the paint's word-spacing for drawing text.
     * @hide
     */
    public float getWordSpacing() {
        return nGetWordSpacing(mNativePaint);
    }

    
Set the paint's word-spacing for text. The default value is 0.
The value is in pixels (note the units are not the same as for
letter-spacing).
Params:
wordSpacing – set the paint's word-spacing for drawing text.
@hide
/**
     * Set the paint's word-spacing for text. The default value is 0.
     * The value is in pixels (note the units are not the same as for
     * letter-spacing).
     *
     * @param wordSpacing set the paint's word-spacing for drawing text.
     * @hide
     */
    public void setWordSpacing(float wordSpacing) {
        nSetWordSpacing(mNativePaint, wordSpacing);
    }

    
Returns the font feature settings. The format is the same as the CSS
font-feature-settings attribute:

    https://www.w3.org/TR/css-fonts-3/#font-feature-settings-prop
See Also:
setFontFeatureSettings(String)
Returns:
the paint's currently set font feature settings. Default is null./**
     * Returns the font feature settings. The format is the same as the CSS
     * font-feature-settings attribute:
     * <a href="https://www.w3.org/TR/css-fonts-3/#font-feature-settings-prop">
     *     https://www.w3.org/TR/css-fonts-3/#font-feature-settings-prop</a>
     *
     * @return the paint's currently set font feature settings. Default is null.
     *
     * @see #setFontFeatureSettings(String)
     */
    public String getFontFeatureSettings() {
        return mFontFeatureSettings;
    }

    
Set font feature settings.
The format is the same as the CSS font-feature-settings attribute:

    https://www.w3.org/TR/css-fonts-3/#font-feature-settings-prop
Params:
settings – the font feature settings string to use, may be null.
See Also:
getFontFeatureSettings()/**
     * Set font feature settings.
     *
     * The format is the same as the CSS font-feature-settings attribute:
     * <a href="https://www.w3.org/TR/css-fonts-3/#font-feature-settings-prop">
     *     https://www.w3.org/TR/css-fonts-3/#font-feature-settings-prop</a>
     *
     * @see #getFontFeatureSettings()
     *
     * @param settings the font feature settings string to use, may be null.
     */
    public void setFontFeatureSettings(String settings) {
        if (settings != null && settings.equals("")) {
            settings = null;
        }
        if ((settings == null && mFontFeatureSettings == null)
                || (settings != null && settings.equals(mFontFeatureSettings))) {
            return;
        }
        mFontFeatureSettings = settings;
        nSetFontFeatureSettings(mNativePaint, settings);
    }

    
Returns the font variation settings.
See Also:
setFontVariationSettings(String)
Returns:
the paint's currently set font variation settings. Default is null./**
     * Returns the font variation settings.
     *
     * @return the paint's currently set font variation settings. Default is null.
     *
     * @see #setFontVariationSettings(String)
     */
    public String getFontVariationSettings() {
        return mFontVariationSettings;
    }

    
Sets TrueType or OpenType font variation settings. The settings string is constructed from
multiple pairs of axis tag and style values. The axis tag must contain four ASCII characters
and must be wrapped with single quotes (U+0027) or double quotes (U+0022). Axis strings that
are longer or shorter than four characters, or contain characters outside of U+0020..U+007E
are invalid. If a specified axis name is not defined in the font, the settings will be
ignored.
Examples,

Set font width to 150.

  Paint paint = new Paint();
  paint.setFontVariationSettings("'wdth' 150");



Set the font slant to 20 degrees and ask for italic style.

  Paint paint = new Paint();
  paint.setFontVariationSettings("'slnt' 20, 'ital' 1");




Params:
fontVariationSettings – font variation settings. You can pass null or empty string as
                             no variation settings.
Throws:
IllegalArgumentException – If given string is not a valid font variation settings
                                 format
See Also:
getFontVariationSettings()
FontVariationAxis
Returns:
true if the given settings is effective to at least one font file underlying this
        typeface. This function also returns true for empty settings string. Otherwise
        returns false/**
     * Sets TrueType or OpenType font variation settings. The settings string is constructed from
     * multiple pairs of axis tag and style values. The axis tag must contain four ASCII characters
     * and must be wrapped with single quotes (U+0027) or double quotes (U+0022). Axis strings that
     * are longer or shorter than four characters, or contain characters outside of U+0020..U+007E
     * are invalid. If a specified axis name is not defined in the font, the settings will be
     * ignored.
     *
     * Examples,
     * <ul>
     * <li>Set font width to 150.
     * <pre>
     * <code>
     *   Paint paint = new Paint();
     *   paint.setFontVariationSettings("'wdth' 150");
     * </code>
     * </pre>
     * </li>
     *
     * <li>Set the font slant to 20 degrees and ask for italic style.
     * <pre>
     * <code>
     *   Paint paint = new Paint();
     *   paint.setFontVariationSettings("'slnt' 20, 'ital' 1");
     * </code>
     * </pre>
     * </li>
     * </ul>
     *
     * @param fontVariationSettings font variation settings. You can pass null or empty string as
     *                              no variation settings.
     *
     * @return true if the given settings is effective to at least one font file underlying this
     *         typeface. This function also returns true for empty settings string. Otherwise
     *         returns false
     *
     * @throws IllegalArgumentException If given string is not a valid font variation settings
     *                                  format
     *
     * @see #getFontVariationSettings()
     * @see FontVariationAxis
     */
    public boolean setFontVariationSettings(String fontVariationSettings) {
        final String settings = TextUtils.nullIfEmpty(fontVariationSettings);
        if (settings == mFontVariationSettings
                || (settings != null && settings.equals(mFontVariationSettings))) {
            return true;
        }

        if (settings == null || settings.length() == 0) {
            mFontVariationSettings = null;
            setTypeface(Typeface.createFromTypefaceWithVariation(mTypeface,
                      Collections.emptyList()));
            return true;
        }

        // The null typeface is valid and it is equivalent to Typeface.DEFAULT.
        // To call isSupportedAxes method, use Typeface.DEFAULT instance.
        Typeface targetTypeface = mTypeface == null ? Typeface.DEFAULT : mTypeface;
        FontVariationAxis[] axes = FontVariationAxis.fromFontVariationSettings(settings);
        final ArrayList<FontVariationAxis> filteredAxes = new ArrayList<FontVariationAxis>();
        for (final FontVariationAxis axis : axes) {
            if (targetTypeface.isSupportedAxes(axis.getOpenTypeTagValue())) {
                filteredAxes.add(axis);
            }
        }
        if (filteredAxes.isEmpty()) {
            return false;
        }
        mFontVariationSettings = settings;
        setTypeface(Typeface.createFromTypefaceWithVariation(targetTypeface, filteredAxes));
        return true;
    }

    
Get the current value of hyphen edit.
Returns:
the current hyphen edit value
@hide
/**
     * Get the current value of hyphen edit.
     *
     * @return the current hyphen edit value
     *
     * @hide
     */
    public int getHyphenEdit() {
        return nGetHyphenEdit(mNativePaint);
    }

    
Set a hyphen edit on the paint (causes a hyphen to be added to text when
measured or drawn).
Params:
hyphen – 0 for no edit, 1 for adding a hyphen at the end, etc.
       Definition of various values are in the HyphenEdit class in Minikin's Hyphenator.h.
@hide
/**
     * Set a hyphen edit on the paint (causes a hyphen to be added to text when
     * measured or drawn).
     *
     * @param hyphen 0 for no edit, 1 for adding a hyphen at the end, etc.
     *        Definition of various values are in the HyphenEdit class in Minikin's Hyphenator.h.
     *
     * @hide
     */
    public void setHyphenEdit(int hyphen) {
        nSetHyphenEdit(mNativePaint, hyphen);
    }

    
Return the distance above (negative) the baseline (ascent) based on the
current typeface and text size.
Note that this is the ascent of the main typeface, and actual text rendered may need a
larger ascent because fallback fonts may get used in rendering the text.
Returns:
the distance above (negative) the baseline (ascent) based on the
        current typeface and text size./**
     * Return the distance above (negative) the baseline (ascent) based on the
     * current typeface and text size.
     *
     * <p>Note that this is the ascent of the main typeface, and actual text rendered may need a
     * larger ascent because fallback fonts may get used in rendering the text.
     *
     * @return the distance above (negative) the baseline (ascent) based on the
     *         current typeface and text size.
     */
    public float ascent() {
        return nAscent(mNativePaint);
    }

    
Return the distance below (positive) the baseline (descent) based on the
current typeface and text size.
Note that this is the descent of the main typeface, and actual text rendered may need a
larger descent because fallback fonts may get used in rendering the text.
Returns:
the distance below (positive) the baseline (descent) based on
        the current typeface and text size./**
     * Return the distance below (positive) the baseline (descent) based on the
     * current typeface and text size.
     *
     * <p>Note that this is the descent of the main typeface, and actual text rendered may need a
     * larger descent because fallback fonts may get used in rendering the text.
     *
     * @return the distance below (positive) the baseline (descent) based on
     *         the current typeface and text size.
     */
    public float descent() {
        return nDescent(mNativePaint);
    }

    
Class that describes the various metrics for a font at a given text size.
Remember, Y values increase going down, so those values will be positive,
and values that measure distances going up will be negative. This class
is returned by getFontMetrics().
/**
     * Class that describes the various metrics for a font at a given text size.
     * Remember, Y values increase going down, so those values will be positive,
     * and values that measure distances going up will be negative. This class
     * is returned by getFontMetrics().
     */
    public static class FontMetrics {
        
The maximum distance above the baseline for the tallest glyph in
the font at a given text size.
/**
         * The maximum distance above the baseline for the tallest glyph in
         * the font at a given text size.
         */
        public float   top;
        
The recommended distance above the baseline for singled spaced text.
/**
         * The recommended distance above the baseline for singled spaced text.
         */
        public float   ascent;
        
The recommended distance below the baseline for singled spaced text.
/**
         * The recommended distance below the baseline for singled spaced text.
         */
        public float   descent;
        
The maximum distance below the baseline for the lowest glyph in
the font at a given text size.
/**
         * The maximum distance below the baseline for the lowest glyph in
         * the font at a given text size.
         */
        public float   bottom;
        
The recommended additional space to add between lines of text.
/**
         * The recommended additional space to add between lines of text.
         */
        public float   leading;
    }

    
Return the font's recommended interline spacing, given the Paint's
settings for typeface, textSize, etc. If metrics is not null, return the
fontmetric values in it.
Note that these are the values for the main typeface, and actual text rendered may need a
larger set of values because fallback fonts may get used in rendering the text.
Params:
metrics – If this object is not null, its fields are filled with
               the appropriate values given the paint's text attributes.
Returns:
the font's recommended interline spacing./**
     * Return the font's recommended interline spacing, given the Paint's
     * settings for typeface, textSize, etc. If metrics is not null, return the
     * fontmetric values in it.
     *
     * <p>Note that these are the values for the main typeface, and actual text rendered may need a
     * larger set of values because fallback fonts may get used in rendering the text.
     *
     * @param metrics If this object is not null, its fields are filled with
     *                the appropriate values given the paint's text attributes.
     * @return the font's recommended interline spacing.
     */
    public float getFontMetrics(FontMetrics metrics) {
        return nGetFontMetrics(mNativePaint, metrics);
    }

    
Allocates a new FontMetrics object, and then calls getFontMetrics(fm)
with it, returning the object.
/**
     * Allocates a new FontMetrics object, and then calls getFontMetrics(fm)
     * with it, returning the object.
     */
    public FontMetrics getFontMetrics() {
        FontMetrics fm = new FontMetrics();
        getFontMetrics(fm);
        return fm;
    }

    
Convenience method for callers that want to have FontMetrics values as
integers.
/**
     * Convenience method for callers that want to have FontMetrics values as
     * integers.
     */
    public static class FontMetricsInt {
        
The maximum distance above the baseline for the tallest glyph in
the font at a given text size.
/**
         * The maximum distance above the baseline for the tallest glyph in
         * the font at a given text size.
         */
        public int   top;
        
The recommended distance above the baseline for singled spaced text.
/**
         * The recommended distance above the baseline for singled spaced text.
         */
        public int   ascent;
        
The recommended distance below the baseline for singled spaced text.
/**
         * The recommended distance below the baseline for singled spaced text.
         */
        public int   descent;
        
The maximum distance below the baseline for the lowest glyph in
the font at a given text size.
/**
         * The maximum distance below the baseline for the lowest glyph in
         * the font at a given text size.
         */
        public int   bottom;
        
The recommended additional space to add between lines of text.
/**
         * The recommended additional space to add between lines of text.
         */
        public int   leading;

        @Override public String toString() {
            return "FontMetricsInt: top=" + top + " ascent=" + ascent +
                    " descent=" + descent + " bottom=" + bottom +
                    " leading=" + leading;
        }
    }

    
Return the font's interline spacing, given the Paint's settings for
typeface, textSize, etc. If metrics is not null, return the fontmetric
values in it. Note: all values have been converted to integers from
floats, in such a way has to make the answers useful for both spacing
and clipping. If you want more control over the rounding, call
getFontMetrics().
Note that these are the values for the main typeface, and actual text rendered may need a
larger set of values because fallback fonts may get used in rendering the text.
Returns:
the font's interline spacing./**
     * Return the font's interline spacing, given the Paint's settings for
     * typeface, textSize, etc. If metrics is not null, return the fontmetric
     * values in it. Note: all values have been converted to integers from
     * floats, in such a way has to make the answers useful for both spacing
     * and clipping. If you want more control over the rounding, call
     * getFontMetrics().
     *
     * <p>Note that these are the values for the main typeface, and actual text rendered may need a
     * larger set of values because fallback fonts may get used in rendering the text.
     *
     * @return the font's interline spacing.
     */
    public int getFontMetricsInt(FontMetricsInt fmi) {
        return nGetFontMetricsInt(mNativePaint, fmi);
    }

    public FontMetricsInt getFontMetricsInt() {
        FontMetricsInt fm = new FontMetricsInt();
        getFontMetricsInt(fm);
        return fm;
    }

    
Return the recommend line spacing based on the current typeface and
text size.
Note that this is the value for the main typeface, and actual text rendered may need a
larger value because fallback fonts may get used in rendering the text.
Returns:
 recommend line spacing based on the current typeface and
         text size./**
     * Return the recommend line spacing based on the current typeface and
     * text size.
     *
     * <p>Note that this is the value for the main typeface, and actual text rendered may need a
     * larger value because fallback fonts may get used in rendering the text.
     *
     * @return  recommend line spacing based on the current typeface and
     *          text size.
     */
    public float getFontSpacing() {
        return getFontMetrics(null);
    }

    
Return the width of the text.
Params:
text –  The text to measure. Cannot be null.
index – The index of the first character to start measuring
count – THe number of characters to measure, beginning with start
Returns:
     The width of the text/**
     * Return the width of the text.
     *
     * @param text  The text to measure. Cannot be null.
     * @param index The index of the first character to start measuring
     * @param count THe number of characters to measure, beginning with start
     * @return      The width of the text
     */
    public float measureText(char[] text, int index, int count) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((index | count) < 0 || index + count > text.length) {
            throw new ArrayIndexOutOfBoundsException();
        }

        if (text.length == 0 || count == 0) {
            return 0f;
        }
        if (!mHasCompatScaling) {
            return (float) Math.ceil(nGetTextAdvances(mNativePaint, text,
                    index, count, index, count, mBidiFlags, null, 0));
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        final float w = nGetTextAdvances(mNativePaint, text, index, count, index, count,
                mBidiFlags, null, 0);
        setTextSize(oldSize);
        return (float) Math.ceil(w*mInvCompatScaling);
    }

    
Return the width of the text.
Params:
text –  The text to measure. Cannot be null.
start – The index of the first character to start measuring
end –   1 beyond the index of the last character to measure
Returns:
     The width of the text/**
     * Return the width of the text.
     *
     * @param text  The text to measure. Cannot be null.
     * @param start The index of the first character to start measuring
     * @param end   1 beyond the index of the last character to measure
     * @return      The width of the text
     */
    public float measureText(String text, int start, int end) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }

        if (text.length() == 0 || start == end) {
            return 0f;
        }
        if (!mHasCompatScaling) {
            return (float) Math.ceil(nGetTextAdvances(mNativePaint, text,
                    start, end, start, end, mBidiFlags, null, 0));
        }
        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        final float w = nGetTextAdvances(mNativePaint, text, start, end, start, end, mBidiFlags,
                null, 0);
        setTextSize(oldSize);
        return (float) Math.ceil(w * mInvCompatScaling);
    }

    
Return the width of the text.
Params:
text –  The text to measure. Cannot be null.
Returns:
     The width of the text/**
     * Return the width of the text.
     *
     * @param text  The text to measure. Cannot be null.
     * @return      The width of the text
     */
    public float measureText(String text) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        return measureText(text, 0, text.length());
    }

    
Return the width of the text.
Params:
text –  The text to measure
start – The index of the first character to start measuring
end –   1 beyond the index of the last character to measure
Returns:
     The width of the text/**
     * Return the width of the text.
     *
     * @param text  The text to measure
     * @param start The index of the first character to start measuring
     * @param end   1 beyond the index of the last character to measure
     * @return      The width of the text
     */
    public float measureText(CharSequence text, int start, int end) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }

        if (text.length() == 0 || start == end) {
            return 0f;
        }
        if (text instanceof String) {
            return measureText((String)text, start, end);
        }
        if (text instanceof SpannedString ||
            text instanceof SpannableString) {
            return measureText(text.toString(), start, end);
        }
        if (text instanceof GraphicsOperations) {
            return ((GraphicsOperations)text).measureText(start, end, this);
        }

        char[] buf = TemporaryBuffer.obtain(end - start);
        TextUtils.getChars(text, start, end, buf, 0);
        float result = measureText(buf, 0, end - start);
        TemporaryBuffer.recycle(buf);
        return result;
    }

    
Measure the text, stopping early if the measured width exceeds maxWidth.
Return the number of chars that were measured, and if measuredWidth is
not null, return in it the actual width measured.
Params:
text –  The text to measure. Cannot be null.
index – The offset into text to begin measuring at
count – The number of maximum number of entries to measure. If count
             is negative, then the characters are measured in reverse order.
maxWidth – The maximum width to accumulate.
measuredWidth – Optional. If not null, returns the actual width
                    measured.
Returns:
The number of chars that were measured. Will always be <=
        abs(count)./**
     * Measure the text, stopping early if the measured width exceeds maxWidth.
     * Return the number of chars that were measured, and if measuredWidth is
     * not null, return in it the actual width measured.
     *
     * @param text  The text to measure. Cannot be null.
     * @param index The offset into text to begin measuring at
     * @param count The number of maximum number of entries to measure. If count
     *              is negative, then the characters are measured in reverse order.
     * @param maxWidth The maximum width to accumulate.
     * @param measuredWidth Optional. If not null, returns the actual width
     *                     measured.
     * @return The number of chars that were measured. Will always be <=
     *         abs(count).
     */
    public int breakText(char[] text, int index, int count,
                                float maxWidth, float[] measuredWidth) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if (index < 0 || text.length - index < Math.abs(count)) {
            throw new ArrayIndexOutOfBoundsException();
        }

        if (text.length == 0 || count == 0) {
            return 0;
        }
        if (!mHasCompatScaling) {
            return nBreakText(mNativePaint, text, index, count, maxWidth, mBidiFlags,
                    measuredWidth);
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        final int res = nBreakText(mNativePaint, text, index, count, maxWidth * mCompatScaling,
                mBidiFlags, measuredWidth);
        setTextSize(oldSize);
        if (measuredWidth != null) measuredWidth[0] *= mInvCompatScaling;
        return res;
    }

    
Measure the text, stopping early if the measured width exceeds maxWidth.
Return the number of chars that were measured, and if measuredWidth is
not null, return in it the actual width measured.
Params:
text –  The text to measure. Cannot be null.
start – The offset into text to begin measuring at
end –   The end of the text slice to measure.
measureForwards – If true, measure forwards, starting at start.
                       Otherwise, measure backwards, starting with end.
maxWidth – The maximum width to accumulate.
measuredWidth – Optional. If not null, returns the actual width
                    measured.
Returns:
The number of chars that were measured. Will always be <=
        abs(end - start)./**
     * Measure the text, stopping early if the measured width exceeds maxWidth.
     * Return the number of chars that were measured, and if measuredWidth is
     * not null, return in it the actual width measured.
     *
     * @param text  The text to measure. Cannot be null.
     * @param start The offset into text to begin measuring at
     * @param end   The end of the text slice to measure.
     * @param measureForwards If true, measure forwards, starting at start.
     *                        Otherwise, measure backwards, starting with end.
     * @param maxWidth The maximum width to accumulate.
     * @param measuredWidth Optional. If not null, returns the actual width
     *                     measured.
     * @return The number of chars that were measured. Will always be <=
     *         abs(end - start).
     */
    public int breakText(CharSequence text, int start, int end,
                         boolean measureForwards,
                         float maxWidth, float[] measuredWidth) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }

        if (text.length() == 0 || start == end) {
            return 0;
        }
        if (start == 0 && text instanceof String && end == text.length()) {
            return breakText((String) text, measureForwards, maxWidth,
                             measuredWidth);
        }

        char[] buf = TemporaryBuffer.obtain(end - start);
        int result;

        TextUtils.getChars(text, start, end, buf, 0);

        if (measureForwards) {
            result = breakText(buf, 0, end - start, maxWidth, measuredWidth);
        } else {
            result = breakText(buf, 0, -(end - start), maxWidth, measuredWidth);
        }

        TemporaryBuffer.recycle(buf);
        return result;
    }

    
Measure the text, stopping early if the measured width exceeds maxWidth.
Return the number of chars that were measured, and if measuredWidth is
not null, return in it the actual width measured.
Params:
text –  The text to measure. Cannot be null.
measureForwards – If true, measure forwards, starting with the
                       first character in the string. Otherwise,
                       measure backwards, starting with the
                       last character in the string.
maxWidth – The maximum width to accumulate.
measuredWidth – Optional. If not null, returns the actual width
                    measured.
Returns:
The number of chars that were measured. Will always be <=
        abs(count)./**
     * Measure the text, stopping early if the measured width exceeds maxWidth.
     * Return the number of chars that were measured, and if measuredWidth is
     * not null, return in it the actual width measured.
     *
     * @param text  The text to measure. Cannot be null.
     * @param measureForwards If true, measure forwards, starting with the
     *                        first character in the string. Otherwise,
     *                        measure backwards, starting with the
     *                        last character in the string.
     * @param maxWidth The maximum width to accumulate.
     * @param measuredWidth Optional. If not null, returns the actual width
     *                     measured.
     * @return The number of chars that were measured. Will always be <=
     *         abs(count).
     */
    public int breakText(String text, boolean measureForwards,
                                float maxWidth, float[] measuredWidth) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }

        if (text.length() == 0) {
            return 0;
        }
        if (!mHasCompatScaling) {
            return nBreakText(mNativePaint, text, measureForwards,
                    maxWidth, mBidiFlags, measuredWidth);
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize*mCompatScaling);
        final int res = nBreakText(mNativePaint, text, measureForwards, maxWidth*mCompatScaling,
                mBidiFlags, measuredWidth);
        setTextSize(oldSize);
        if (measuredWidth != null) measuredWidth[0] *= mInvCompatScaling;
        return res;
    }

    
Return the advance widths for the characters in the string.
Params:
text –     The text to measure. Cannot be null.
index –    The index of the first char to to measure
count –    The number of chars starting with index to measure
widths –   array to receive the advance widths of the characters.
                Must be at least a large as count.
Returns:
        the actual number of widths returned./**
     * Return the advance widths for the characters in the string.
     *
     * @param text     The text to measure. Cannot be null.
     * @param index    The index of the first char to to measure
     * @param count    The number of chars starting with index to measure
     * @param widths   array to receive the advance widths of the characters.
     *                 Must be at least a large as count.
     * @return         the actual number of widths returned.
     */
    public int getTextWidths(char[] text, int index, int count,
                             float[] widths) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((index | count) < 0 || index + count > text.length
                || count > widths.length) {
            throw new ArrayIndexOutOfBoundsException();
        }

        if (text.length == 0 || count == 0) {
            return 0;
        }
        if (!mHasCompatScaling) {
            nGetTextAdvances(mNativePaint, text, index, count, index, count, mBidiFlags, widths, 0);
            return count;
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        nGetTextAdvances(mNativePaint, text, index, count, index, count, mBidiFlags, widths, 0);
        setTextSize(oldSize);
        for (int i = 0; i < count; i++) {
            widths[i] *= mInvCompatScaling;
        }
        return count;
    }

    
Return the advance widths for the characters in the string.
Params:
text –     The text to measure. Cannot be null.
start –    The index of the first char to to measure
end –      The end of the text slice to measure
widths –   array to receive the advance widths of the characters.
                Must be at least a large as (end - start).
Returns:
        the actual number of widths returned./**
     * Return the advance widths for the characters in the string.
     *
     * @param text     The text to measure. Cannot be null.
     * @param start    The index of the first char to to measure
     * @param end      The end of the text slice to measure
     * @param widths   array to receive the advance widths of the characters.
     *                 Must be at least a large as (end - start).
     * @return         the actual number of widths returned.
     */
    public int getTextWidths(CharSequence text, int start, int end,
                             float[] widths) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }
        if (end - start > widths.length) {
            throw new ArrayIndexOutOfBoundsException();
        }

        if (text.length() == 0 || start == end) {
            return 0;
        }
        if (text instanceof String) {
            return getTextWidths((String) text, start, end, widths);
        }
        if (text instanceof SpannedString ||
            text instanceof SpannableString) {
            return getTextWidths(text.toString(), start, end, widths);
        }
        if (text instanceof GraphicsOperations) {
            return ((GraphicsOperations) text).getTextWidths(start, end,
                                                                 widths, this);
        }

        char[] buf = TemporaryBuffer.obtain(end - start);
        TextUtils.getChars(text, start, end, buf, 0);
        int result = getTextWidths(buf, 0, end - start, widths);
        TemporaryBuffer.recycle(buf);
        return result;
    }

    
Return the advance widths for the characters in the string.
Params:
text –   The text to measure. Cannot be null.
start –  The index of the first char to to measure
end –    The end of the text slice to measure
widths – array to receive the advance widths of the characters.
              Must be at least a large as the text.
Returns:
      the number of code units in the specified text./**
     * Return the advance widths for the characters in the string.
     *
     * @param text   The text to measure. Cannot be null.
     * @param start  The index of the first char to to measure
     * @param end    The end of the text slice to measure
     * @param widths array to receive the advance widths of the characters.
     *               Must be at least a large as the text.
     * @return       the number of code units in the specified text.
     */
    public int getTextWidths(String text, int start, int end, float[] widths) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }
        if (end - start > widths.length) {
            throw new ArrayIndexOutOfBoundsException();
        }

        if (text.length() == 0 || start == end) {
            return 0;
        }
        if (!mHasCompatScaling) {
            nGetTextAdvances(mNativePaint, text, start, end, start, end, mBidiFlags, widths, 0);
            return end - start;
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        nGetTextAdvances(mNativePaint, text, start, end, start, end, mBidiFlags, widths, 0);
        setTextSize(oldSize);
        for (int i = 0; i < end - start; i++) {
            widths[i] *= mInvCompatScaling;
        }
        return end - start;
    }

    
Return the advance widths for the characters in the string.
Params:
text –   The text to measure
widths – array to receive the advance widths of the characters.
              Must be at least a large as the text.
Returns:
      the number of code units in the specified text./**
     * Return the advance widths for the characters in the string.
     *
     * @param text   The text to measure
     * @param widths array to receive the advance widths of the characters.
     *               Must be at least a large as the text.
     * @return       the number of code units in the specified text.
     */
    public int getTextWidths(String text, float[] widths) {
        return getTextWidths(text, 0, text.length(), widths);
    }

    
Convenience overload that takes a char array instead of a
String.
See Also:
getTextRunAdvances(String, int, int, int, int, boolean, float[], int)
@hide
/**
     * Convenience overload that takes a char array instead of a
     * String.
     *
     * @see #getTextRunAdvances(String, int, int, int, int, boolean, float[], int)
     * @hide
     */
    public float getTextRunAdvances(char[] chars, int index, int count,
            int contextIndex, int contextCount, boolean isRtl, float[] advances,
            int advancesIndex) {

        if (chars == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((index | count | contextIndex | contextCount | advancesIndex
                | (index - contextIndex) | (contextCount - count)
                | ((contextIndex + contextCount) - (index + count))
                | (chars.length - (contextIndex + contextCount))
                | (advances == null ? 0 :
                    (advances.length - (advancesIndex + count)))) < 0) {
            throw new IndexOutOfBoundsException();
        }

        if (chars.length == 0 || count == 0){
            return 0f;
        }
        if (!mHasCompatScaling) {
            return nGetTextAdvances(mNativePaint, chars, index, count, contextIndex, contextCount,
                    isRtl ? BIDI_FORCE_RTL : BIDI_FORCE_LTR, advances,
                    advancesIndex);
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        final float res = nGetTextAdvances(mNativePaint, chars, index, count, contextIndex,
                contextCount, isRtl ? BIDI_FORCE_RTL : BIDI_FORCE_LTR, advances, advancesIndex);
        setTextSize(oldSize);

        if (advances != null) {
            for (int i = advancesIndex, e = i + count; i < e; i++) {
                advances[i] *= mInvCompatScaling;
            }
        }
        return res * mInvCompatScaling; // assume errors are not significant
    }

    
Convenience overload that takes a CharSequence instead of a
String.
See Also:
getTextRunAdvances(String, int, int, int, int, boolean, float[], int)
@hide
/**
     * Convenience overload that takes a CharSequence instead of a
     * String.
     *
     * @see #getTextRunAdvances(String, int, int, int, int, boolean, float[], int)
     * @hide
     */
    public float getTextRunAdvances(CharSequence text, int start, int end,
            int contextStart, int contextEnd, boolean isRtl, float[] advances,
            int advancesIndex) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | contextStart | contextEnd | advancesIndex | (end - start)
                | (start - contextStart) | (contextEnd - end)
                | (text.length() - contextEnd)
                | (advances == null ? 0 :
                    (advances.length - advancesIndex - (end - start)))) < 0) {
            throw new IndexOutOfBoundsException();
        }

        if (text instanceof String) {
            return getTextRunAdvances((String) text, start, end,
                    contextStart, contextEnd, isRtl, advances, advancesIndex);
        }
        if (text instanceof SpannedString ||
            text instanceof SpannableString) {
            return getTextRunAdvances(text.toString(), start, end,
                    contextStart, contextEnd, isRtl, advances, advancesIndex);
        }
        if (text instanceof GraphicsOperations) {
            return ((GraphicsOperations) text).getTextRunAdvances(start, end,
                    contextStart, contextEnd, isRtl, advances, advancesIndex, this);
        }
        if (text.length() == 0 || end == start) {
            return 0f;
        }

        int contextLen = contextEnd - contextStart;
        int len = end - start;
        char[] buf = TemporaryBuffer.obtain(contextLen);
        TextUtils.getChars(text, contextStart, contextEnd, buf, 0);
        float result = getTextRunAdvances(buf, start - contextStart, len,
                0, contextLen, isRtl, advances, advancesIndex);
        TemporaryBuffer.recycle(buf);
        return result;
    }

    
Returns the total advance width for the characters in the run
between start and end, and if advances is not null, the advance
assigned to each of these characters (java chars).
The trailing surrogate in a valid surrogate pair is assigned
an advance of 0.  Thus the number of returned advances is
always equal to count, not to the number of unicode codepoints
represented by the run.
In the case of conjuncts or combining marks, the total
advance is assigned to the first logical character, and the
following characters are assigned an advance of 0.
This generates the sum of the advances of glyphs for
characters in a reordered cluster as the width of the first
logical character in the cluster, and 0 for the widths of all
other characters in the cluster.  In effect, such clusters are
treated like conjuncts.
The shaping bounds limit the amount of context available
outside start and end that can be used for shaping analysis.
These bounds typically reflect changes in bidi level or font
metrics across which shaping does not occur.
Params:
text – the text to measure. Cannot be null.
start – the index of the first character to measure
end – the index past the last character to measure
contextStart – the index of the first character to use for shaping context,
must be <= start
contextEnd – the index past the last character to use for shaping context,
must be >= end
isRtl – whether the run is in RTL direction
advances – array to receive the advances, must have room for all advances,
can be null if only total advance is needed
advancesIndex – the position in advances at which to put the
advance corresponding to the character at start
Returns:
the total advance
@hide
/**
     * Returns the total advance width for the characters in the run
     * between start and end, and if advances is not null, the advance
     * assigned to each of these characters (java chars).
     *
     * <p>The trailing surrogate in a valid surrogate pair is assigned
     * an advance of 0.  Thus the number of returned advances is
     * always equal to count, not to the number of unicode codepoints
     * represented by the run.
     *
     * <p>In the case of conjuncts or combining marks, the total
     * advance is assigned to the first logical character, and the
     * following characters are assigned an advance of 0.
     *
     * <p>This generates the sum of the advances of glyphs for
     * characters in a reordered cluster as the width of the first
     * logical character in the cluster, and 0 for the widths of all
     * other characters in the cluster.  In effect, such clusters are
     * treated like conjuncts.
     *
     * <p>The shaping bounds limit the amount of context available
     * outside start and end that can be used for shaping analysis.
     * These bounds typically reflect changes in bidi level or font
     * metrics across which shaping does not occur.
     *
     * @param text the text to measure. Cannot be null.
     * @param start the index of the first character to measure
     * @param end the index past the last character to measure
     * @param contextStart the index of the first character to use for shaping context,
     * must be <= start
     * @param contextEnd the index past the last character to use for shaping context,
     * must be >= end
     * @param isRtl whether the run is in RTL direction
     * @param advances array to receive the advances, must have room for all advances,
     * can be null if only total advance is needed
     * @param advancesIndex the position in advances at which to put the
     * advance corresponding to the character at start
     * @return the total advance
     *
     * @hide
     */
    public float getTextRunAdvances(String text, int start, int end, int contextStart,
            int contextEnd, boolean isRtl, float[] advances, int advancesIndex) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((start | end | contextStart | contextEnd | advancesIndex | (end - start)
                | (start - contextStart) | (contextEnd - end)
                | (text.length() - contextEnd)
                | (advances == null ? 0 :
                    (advances.length - advancesIndex - (end - start)))) < 0) {
            throw new IndexOutOfBoundsException();
        }

        if (text.length() == 0 || start == end) {
            return 0f;
        }

        if (!mHasCompatScaling) {
            return nGetTextAdvances(mNativePaint, text, start, end, contextStart, contextEnd,
                    isRtl ? BIDI_FORCE_RTL : BIDI_FORCE_LTR, advances, advancesIndex);
        }

        final float oldSize = getTextSize();
        setTextSize(oldSize * mCompatScaling);
        final float totalAdvance = nGetTextAdvances(mNativePaint, text, start, end, contextStart,
                contextEnd, isRtl ? BIDI_FORCE_RTL : BIDI_FORCE_LTR, advances, advancesIndex);
        setTextSize(oldSize);

        if (advances != null) {
            for (int i = advancesIndex, e = i + (end - start); i < e; i++) {
                advances[i] *= mInvCompatScaling;
            }
        }
        return totalAdvance * mInvCompatScaling; // assume errors are insignificant
    }

    
Returns the next cursor position in the run.  This avoids placing the
cursor between surrogates, between characters that form conjuncts,
between base characters and combining marks, or within a reordering
cluster.
ContextStart and offset are relative to the start of text.
The context is the shaping context for cursor movement, generally
the bounds of the metric span enclosing the cursor in the direction of
movement.
If cursorOpt is CURSOR_AT and the offset is not a valid cursor position, this returns -1. Otherwise this will never return a value before contextStart or after contextStart + contextLength. 
Params:
text – the text
contextStart – the start of the context
contextLength – the length of the context
dir – either DIRECTION_RTL or DIRECTION_LTR
offset – the cursor position to move from
cursorOpt – how to move the cursor, one of CURSOR_AFTER, CURSOR_AT_OR_AFTER, CURSOR_BEFORE, CURSOR_AT_OR_BEFORE, or CURSOR_AT
Returns:
the offset of the next position, or -1
@hide
/**
     * Returns the next cursor position in the run.  This avoids placing the
     * cursor between surrogates, between characters that form conjuncts,
     * between base characters and combining marks, or within a reordering
     * cluster.
     *
     * <p>ContextStart and offset are relative to the start of text.
     * The context is the shaping context for cursor movement, generally
     * the bounds of the metric span enclosing the cursor in the direction of
     * movement.
     *
     * <p>If cursorOpt is {@link #CURSOR_AT} and the offset is not a valid
     * cursor position, this returns -1.  Otherwise this will never return a
     * value before contextStart or after contextStart + contextLength.
     *
     * @param text the text
     * @param contextStart the start of the context
     * @param contextLength the length of the context
     * @param dir either {@link #DIRECTION_RTL} or {@link #DIRECTION_LTR}
     * @param offset the cursor position to move from
     * @param cursorOpt how to move the cursor, one of {@link #CURSOR_AFTER},
     * {@link #CURSOR_AT_OR_AFTER}, {@link #CURSOR_BEFORE},
     * {@link #CURSOR_AT_OR_BEFORE}, or {@link #CURSOR_AT}
     * @return the offset of the next position, or -1
     * @hide
     */
    public int getTextRunCursor(char[] text, int contextStart, int contextLength,
            int dir, int offset, int cursorOpt) {
        int contextEnd = contextStart + contextLength;
        if (((contextStart | contextEnd | offset | (contextEnd - contextStart)
                | (offset - contextStart) | (contextEnd - offset)
                | (text.length - contextEnd) | cursorOpt) < 0)
                || cursorOpt > CURSOR_OPT_MAX_VALUE) {
            throw new IndexOutOfBoundsException();
        }

        return nGetTextRunCursor(mNativePaint, text, contextStart, contextLength, dir, offset,
                cursorOpt);
    }

    
Returns the next cursor position in the run.  This avoids placing the
cursor between surrogates, between characters that form conjuncts,
between base characters and combining marks, or within a reordering
cluster.
ContextStart, contextEnd, and offset are relative to the start of
text.  The context is the shaping context for cursor movement, generally
the bounds of the metric span enclosing the cursor in the direction of
movement.
If cursorOpt is CURSOR_AT and the offset is not a valid cursor position, this returns -1. Otherwise this will never return a value before contextStart or after contextEnd. 
Params:
text – the text
contextStart – the start of the context
contextEnd – the end of the context
dir – either DIRECTION_RTL or DIRECTION_LTR
offset – the cursor position to move from
cursorOpt – how to move the cursor, one of CURSOR_AFTER, CURSOR_AT_OR_AFTER, CURSOR_BEFORE, CURSOR_AT_OR_BEFORE, or CURSOR_AT
Returns:
the offset of the next position, or -1
@hide
/**
     * Returns the next cursor position in the run.  This avoids placing the
     * cursor between surrogates, between characters that form conjuncts,
     * between base characters and combining marks, or within a reordering
     * cluster.
     *
     * <p>ContextStart, contextEnd, and offset are relative to the start of
     * text.  The context is the shaping context for cursor movement, generally
     * the bounds of the metric span enclosing the cursor in the direction of
     * movement.
     *
     * <p>If cursorOpt is {@link #CURSOR_AT} and the offset is not a valid
     * cursor position, this returns -1.  Otherwise this will never return a
     * value before contextStart or after contextEnd.
     *
     * @param text the text
     * @param contextStart the start of the context
     * @param contextEnd the end of the context
     * @param dir either {@link #DIRECTION_RTL} or {@link #DIRECTION_LTR}
     * @param offset the cursor position to move from
     * @param cursorOpt how to move the cursor, one of {@link #CURSOR_AFTER},
     * {@link #CURSOR_AT_OR_AFTER}, {@link #CURSOR_BEFORE},
     * {@link #CURSOR_AT_OR_BEFORE}, or {@link #CURSOR_AT}
     * @return the offset of the next position, or -1
     * @hide
     */
    public int getTextRunCursor(CharSequence text, int contextStart,
           int contextEnd, int dir, int offset, int cursorOpt) {

        if (text instanceof String || text instanceof SpannedString ||
                text instanceof SpannableString) {
            return getTextRunCursor(text.toString(), contextStart, contextEnd,
                    dir, offset, cursorOpt);
        }
        if (text instanceof GraphicsOperations) {
            return ((GraphicsOperations) text).getTextRunCursor(
                    contextStart, contextEnd, dir, offset, cursorOpt, this);
        }

        int contextLen = contextEnd - contextStart;
        char[] buf = TemporaryBuffer.obtain(contextLen);
        TextUtils.getChars(text, contextStart, contextEnd, buf, 0);
        int relPos = getTextRunCursor(buf, 0, contextLen, dir, offset - contextStart, cursorOpt);
        TemporaryBuffer.recycle(buf);
        return (relPos == -1) ? -1 : relPos + contextStart;
    }

    
Returns the next cursor position in the run.  This avoids placing the
cursor between surrogates, between characters that form conjuncts,
between base characters and combining marks, or within a reordering
cluster.
ContextStart, contextEnd, and offset are relative to the start of
text.  The context is the shaping context for cursor movement, generally
the bounds of the metric span enclosing the cursor in the direction of
movement.
If cursorOpt is CURSOR_AT and the offset is not a valid cursor position, this returns -1. Otherwise this will never return a value before contextStart or after contextEnd. 
Params:
text – the text
contextStart – the start of the context
contextEnd – the end of the context
dir – either DIRECTION_RTL or DIRECTION_LTR
offset – the cursor position to move from
cursorOpt – how to move the cursor, one of CURSOR_AFTER, CURSOR_AT_OR_AFTER, CURSOR_BEFORE, CURSOR_AT_OR_BEFORE, or CURSOR_AT
Returns:
the offset of the next position, or -1
@hide
/**
     * Returns the next cursor position in the run.  This avoids placing the
     * cursor between surrogates, between characters that form conjuncts,
     * between base characters and combining marks, or within a reordering
     * cluster.
     *
     * <p>ContextStart, contextEnd, and offset are relative to the start of
     * text.  The context is the shaping context for cursor movement, generally
     * the bounds of the metric span enclosing the cursor in the direction of
     * movement.
     *
     * <p>If cursorOpt is {@link #CURSOR_AT} and the offset is not a valid
     * cursor position, this returns -1.  Otherwise this will never return a
     * value before contextStart or after contextEnd.
     *
     * @param text the text
     * @param contextStart the start of the context
     * @param contextEnd the end of the context
     * @param dir either {@link #DIRECTION_RTL} or {@link #DIRECTION_LTR}
     * @param offset the cursor position to move from
     * @param cursorOpt how to move the cursor, one of {@link #CURSOR_AFTER},
     * {@link #CURSOR_AT_OR_AFTER}, {@link #CURSOR_BEFORE},
     * {@link #CURSOR_AT_OR_BEFORE}, or {@link #CURSOR_AT}
     * @return the offset of the next position, or -1
     * @hide
     */
    public int getTextRunCursor(String text, int contextStart, int contextEnd,
            int dir, int offset, int cursorOpt) {
        if (((contextStart | contextEnd | offset | (contextEnd - contextStart)
                | (offset - contextStart) | (contextEnd - offset)
                | (text.length() - contextEnd) | cursorOpt) < 0)
                || cursorOpt > CURSOR_OPT_MAX_VALUE) {
            throw new IndexOutOfBoundsException();
        }

        return nGetTextRunCursor(mNativePaint, text, contextStart, contextEnd, dir, offset,
                cursorOpt);
    }

    
Return the path (outline) for the specified text.
Note: just like Canvas.drawText, this will respect the Align setting in
the paint.
Params:
text – the text to retrieve the path from
index – the index of the first character in text
count – the number of characters starting with index
x – the x coordinate of the text's origin
y – the y coordinate of the text's origin
path – the path to receive the data describing the text. Must be allocated by the caller/**
     * Return the path (outline) for the specified text.
     * Note: just like Canvas.drawText, this will respect the Align setting in
     * the paint.
     *
     * @param text the text to retrieve the path from
     * @param index the index of the first character in text
     * @param count the number of characters starting with index
     * @param x the x coordinate of the text's origin
     * @param y the y coordinate of the text's origin
     * @param path the path to receive the data describing the text. Must be allocated by the caller
     */
    public void getTextPath(char[] text, int index, int count,
                            float x, float y, Path path) {
        if ((index | count) < 0 || index + count > text.length) {
            throw new ArrayIndexOutOfBoundsException();
        }
        nGetTextPath(mNativePaint, mBidiFlags, text, index, count, x, y, path.mutateNI());
    }

    
Return the path (outline) for the specified text.
Note: just like Canvas.drawText, this will respect the Align setting
in the paint.
Params:
text – the text to retrieve the path from
start – the first character in the text
end – 1 past the last character in the text
x – the x coordinate of the text's origin
y – the y coordinate of the text's origin
path – the path to receive the data describing the text. Must be allocated by the caller/**
     * Return the path (outline) for the specified text.
     * Note: just like Canvas.drawText, this will respect the Align setting
     * in the paint.
     *
     * @param text the text to retrieve the path from
     * @param start the first character in the text
     * @param end 1 past the last character in the text
     * @param x the x coordinate of the text's origin
     * @param y the y coordinate of the text's origin
     * @param path the path to receive the data describing the text. Must be allocated by the caller
     */
    public void getTextPath(String text, int start, int end,
                            float x, float y, Path path) {
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }
        nGetTextPath(mNativePaint, mBidiFlags, text, start, end, x, y, path.mutateNI());
    }

    
Return in bounds (allocated by the caller) the smallest rectangle that
encloses all of the characters, with an implied origin at (0,0).
Params:
text – string to measure and return its bounds
start – index of the first char in the string to measure
end – 1 past the last char in the string to measure
bounds – returns the unioned bounds of all the text. Must be allocated by the caller/**
     * Return in bounds (allocated by the caller) the smallest rectangle that
     * encloses all of the characters, with an implied origin at (0,0).
     *
     * @param text string to measure and return its bounds
     * @param start index of the first char in the string to measure
     * @param end 1 past the last char in the string to measure
     * @param bounds returns the unioned bounds of all the text. Must be allocated by the caller
     */
    public void getTextBounds(String text, int start, int end, Rect bounds) {
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }
        if (bounds == null) {
            throw new NullPointerException("need bounds Rect");
        }
        nGetStringBounds(mNativePaint, text, start, end, mBidiFlags, bounds);
    }

    
Return in bounds (allocated by the caller) the smallest rectangle that
encloses all of the characters, with an implied origin at (0,0).
Params:
text – text to measure and return its bounds
start – index of the first char in the text to measure
end – 1 past the last char in the text to measure
bounds – returns the unioned bounds of all the text. Must be allocated by the caller
@hide
/**
     * Return in bounds (allocated by the caller) the smallest rectangle that
     * encloses all of the characters, with an implied origin at (0,0).
     *
     * @param text text to measure and return its bounds
     * @param start index of the first char in the text to measure
     * @param end 1 past the last char in the text to measure
     * @param bounds returns the unioned bounds of all the text. Must be allocated by the caller
     * @hide
     */
    public void getTextBounds(CharSequence text, int start, int end, Rect bounds) {
        if ((start | end | (end - start) | (text.length() - end)) < 0) {
            throw new IndexOutOfBoundsException();
        }
        if (bounds == null) {
            throw new NullPointerException("need bounds Rect");
        }
        char[] buf = TemporaryBuffer.obtain(end - start);
        TextUtils.getChars(text, start, end, buf, 0);
        getTextBounds(buf, 0, end - start, bounds);
        TemporaryBuffer.recycle(buf);
    }

    
Return in bounds (allocated by the caller) the smallest rectangle that
encloses all of the characters, with an implied origin at (0,0).
Params:
text –  array of chars to measure and return their unioned bounds
index – index of the first char in the array to measure
count – the number of chars, beginning at index, to measure
bounds – returns the unioned bounds of all the text. Must be allocated by the caller/**
     * Return in bounds (allocated by the caller) the smallest rectangle that
     * encloses all of the characters, with an implied origin at (0,0).
     *
     * @param text  array of chars to measure and return their unioned bounds
     * @param index index of the first char in the array to measure
     * @param count the number of chars, beginning at index, to measure
     * @param bounds returns the unioned bounds of all the text. Must be allocated by the caller
     */
    public void getTextBounds(char[] text, int index, int count, Rect bounds) {
        if ((index | count) < 0 || index + count > text.length) {
            throw new ArrayIndexOutOfBoundsException();
        }
        if (bounds == null) {
            throw new NullPointerException("need bounds Rect");
        }
        nGetCharArrayBounds(mNativePaint, text, index, count, mBidiFlags,
            bounds);
    }

    
Determine whether the typeface set on the paint has a glyph supporting the string. The
simplest case is when the string contains a single character, in which this method
determines whether the font has the character. In the case of multiple characters, the
method returns true if there is a single glyph representing the ligature. For example, if
the input is a pair of regional indicator symbols, determine whether there is an emoji flag
for the pair.
Finally, if the string contains a variation selector, the method only returns true if
the fonts contains a glyph specific to that variation.
Checking is done on the entire fallback chain, not just the immediate font referenced.
Params:
string – the string to test whether there is glyph support
Returns:
true if the typeface has a glyph for the string/**
     * Determine whether the typeface set on the paint has a glyph supporting the string. The
     * simplest case is when the string contains a single character, in which this method
     * determines whether the font has the character. In the case of multiple characters, the
     * method returns true if there is a single glyph representing the ligature. For example, if
     * the input is a pair of regional indicator symbols, determine whether there is an emoji flag
     * for the pair.
     *
     * <p>Finally, if the string contains a variation selector, the method only returns true if
     * the fonts contains a glyph specific to that variation.
     *
     * <p>Checking is done on the entire fallback chain, not just the immediate font referenced.
     *
     * @param string the string to test whether there is glyph support
     * @return true if the typeface has a glyph for the string
     */
    public boolean hasGlyph(String string) {
        return nHasGlyph(mNativePaint, mBidiFlags, string);
    }

    
Measure cursor position within a run of text.
The run of text includes the characters from start to end in the text. In addition, the range contextStart to contextEnd is used as context for the purpose of complex text shaping, such as Arabic text potentially shaped differently based on the text next to it. 
All text outside the range contextStart..contextEnd is ignored. The text between start and end will be laid out to be measured. 
The returned width measurement is the advance from start to offset. It is generally a positive value, no matter the direction of the run. If offset == end, the return value is simply the width of the whole run from start to end. 
Ligatures are formed for characters in the range start..end (but not for start..contextStart or end..contextEnd). If offset points to a character in the middle of such a formed ligature, but at a grapheme cluster boundary, the return value will also reflect an advance in the middle of the ligature. See getOffsetForAdvance for more discussion of grapheme cluster boundaries. 
The direction of the run is explicitly specified by isRtl. Thus, this method is suitable only for runs of a single direction. 
All indices are relative to the start of text. Further, 0 <= contextStart
<= start <= offset <= end <= contextEnd <= text.length must hold on entry. 
Params:
text – the text to measure. Cannot be null.
start – the index of the start of the range to measure
end – the index + 1 of the end of the range to measure
contextStart – the index of the start of the shaping context
contextEnd – the index + 1 of the end of the shaping context
isRtl – whether the run is in RTL direction
offset – index of caret position
Returns:
width measurement between start and offset/**
     * Measure cursor position within a run of text.
     *
     * <p>The run of text includes the characters from {@code start} to {@code end} in the text. In
     * addition, the range {@code contextStart} to {@code contextEnd} is used as context for the
     * purpose of complex text shaping, such as Arabic text potentially shaped differently based on
     * the text next to it.
     *
     * <p>All text outside the range {@code contextStart..contextEnd} is ignored. The text between
     * {@code start} and {@code end} will be laid out to be measured.
     *
     * <p>The returned width measurement is the advance from {@code start} to {@code offset}. It is
     * generally a positive value, no matter the direction of the run. If {@code offset == end},
     * the return value is simply the width of the whole run from {@code start} to {@code end}.
     *
     * <p>Ligatures are formed for characters in the range {@code start..end} (but not for
     * {@code start..contextStart} or {@code end..contextEnd}). If {@code offset} points to a
     * character in the middle of such a formed ligature, but at a grapheme cluster boundary, the
     * return value will also reflect an advance in the middle of the ligature. See
     * {@link #getOffsetForAdvance} for more discussion of grapheme cluster boundaries.
     *
     * <p>The direction of the run is explicitly specified by {@code isRtl}. Thus, this method is
     * suitable only for runs of a single direction.
     *
     * <p>All indices are relative to the start of {@code text}. Further, {@code 0 <= contextStart
     * <= start <= offset <= end <= contextEnd <= text.length} must hold on entry.
     *
     * @param text the text to measure. Cannot be null.
     * @param start the index of the start of the range to measure
     * @param end the index + 1 of the end of the range to measure
     * @param contextStart the index of the start of the shaping context
     * @param contextEnd the index + 1 of the end of the shaping context
     * @param isRtl whether the run is in RTL direction
     * @param offset index of caret position
     * @return width measurement between start and offset
     */
    public float getRunAdvance(char[] text, int start, int end, int contextStart, int contextEnd,
            boolean isRtl, int offset) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((contextStart | start | offset | end | contextEnd
                | start - contextStart | offset - start | end - offset
                | contextEnd - end | text.length - contextEnd) < 0) {
            throw new IndexOutOfBoundsException();
        }
        if (end == start) {
            return 0.0f;
        }
        // TODO: take mCompatScaling into account (or eliminate compat scaling)?
        return nGetRunAdvance(mNativePaint, text, start, end, contextStart, contextEnd, isRtl,
                offset);
    }

    
Params:
text – the text to measure. Cannot be null.
start – the index of the start of the range to measure
end – the index + 1 of the end of the range to measure
contextStart – the index of the start of the shaping context
contextEnd – the index + 1 of the end of the shaping context
isRtl – whether the run is in RTL direction
offset – index of caret position
See Also:
getRunAdvance(char[], int, int, int, int, boolean, int)
Returns:
width measurement between start and offset/**
     * @see #getRunAdvance(char[], int, int, int, int, boolean, int)
     *
     * @param text the text to measure. Cannot be null.
     * @param start the index of the start of the range to measure
     * @param end the index + 1 of the end of the range to measure
     * @param contextStart the index of the start of the shaping context
     * @param contextEnd the index + 1 of the end of the shaping context
     * @param isRtl whether the run is in RTL direction
     * @param offset index of caret position
     * @return width measurement between start and offset
     */
    public float getRunAdvance(CharSequence text, int start, int end, int contextStart,
            int contextEnd, boolean isRtl, int offset) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((contextStart | start | offset | end | contextEnd
                | start - contextStart | offset - start | end - offset
                | contextEnd - end | text.length() - contextEnd) < 0) {
            throw new IndexOutOfBoundsException();
        }
        if (end == start) {
            return 0.0f;
        }
        // TODO performance: specialized alternatives to avoid buffer copy, if win is significant
        char[] buf = TemporaryBuffer.obtain(contextEnd - contextStart);
        TextUtils.getChars(text, contextStart, contextEnd, buf, 0);
        float result = getRunAdvance(buf, start - contextStart, end - contextStart, 0,
                contextEnd - contextStart, isRtl, offset - contextStart);
        TemporaryBuffer.recycle(buf);
        return result;
    }

    
Get the character offset within the string whose position is closest to the specified
horizontal position.
The returned value is generally the value of offset for which getRunAdvance yields a result most closely approximating advance, and which is also on a grapheme cluster boundary. As such, it is the preferred method for positioning a cursor in response to a touch or pointer event. The grapheme cluster boundaries are based on Unicode Standard Annex #29 but with some
tailoring for better user experience.
Note that advance is a (generally positive) width measurement relative to the start of the run. Thus, for RTL runs it the distance from the point to the right edge. 
All indices are relative to the start of text. Further, 0 <= contextStart
<= start <= end <= contextEnd <= text.length must hold on entry, and start <= result
<= end will hold on return. 
Params:
text – the text to measure. Cannot be null.
start – the index of the start of the range to measure
end – the index + 1 of the end of the range to measure
contextStart – the index of the start of the shaping context
contextEnd – the index + 1 of the end of the range to measure
isRtl – whether the run is in RTL direction
advance – width relative to start of run
Returns:
index of offset/**
     * Get the character offset within the string whose position is closest to the specified
     * horizontal position.
     *
     * <p>The returned value is generally the value of {@code offset} for which
     * {@link #getRunAdvance} yields a result most closely approximating {@code advance},
     * and which is also on a grapheme cluster boundary. As such, it is the preferred method
     * for positioning a cursor in response to a touch or pointer event. The grapheme cluster
     * boundaries are based on
     * <a href="http://unicode.org/reports/tr29/">Unicode Standard Annex #29</a> but with some
     * tailoring for better user experience.
     *
     * <p>Note that {@code advance} is a (generally positive) width measurement relative to the start
     * of the run. Thus, for RTL runs it the distance from the point to the right edge.
     *
     * <p>All indices are relative to the start of {@code text}. Further, {@code 0 <= contextStart
     * <= start <= end <= contextEnd <= text.length} must hold on entry, and {@code start <= result
     * <= end} will hold on return.
     *
     * @param text the text to measure. Cannot be null.
     * @param start the index of the start of the range to measure
     * @param end the index + 1 of the end of the range to measure
     * @param contextStart the index of the start of the shaping context
     * @param contextEnd the index + 1 of the end of the range to measure
     * @param isRtl whether the run is in RTL direction
     * @param advance width relative to start of run
     * @return index of offset
     */
    public int getOffsetForAdvance(char[] text, int start, int end, int contextStart,
            int contextEnd, boolean isRtl, float advance) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((contextStart | start | end | contextEnd
                | start - contextStart | end - start | contextEnd - end
                | text.length - contextEnd) < 0) {
            throw new IndexOutOfBoundsException();
        }
        // TODO: take mCompatScaling into account (or eliminate compat scaling)?
        return nGetOffsetForAdvance(mNativePaint, text, start, end, contextStart, contextEnd,
                isRtl, advance);
    }

    
Params:
text – the text to measure. Cannot be null.
start – the index of the start of the range to measure
end – the index + 1 of the end of the range to measure
contextStart – the index of the start of the shaping context
contextEnd – the index + 1 of the end of the range to measure
isRtl – whether the run is in RTL direction
advance – width relative to start of run
See Also:
getOffsetForAdvance(char[], int, int, int, int, boolean, float)
Returns:
index of offset/**
     * @see #getOffsetForAdvance(char[], int, int, int, int, boolean, float)
     *
     * @param text the text to measure. Cannot be null.
     * @param start the index of the start of the range to measure
     * @param end the index + 1 of the end of the range to measure
     * @param contextStart the index of the start of the shaping context
     * @param contextEnd the index + 1 of the end of the range to measure
     * @param isRtl whether the run is in RTL direction
     * @param advance width relative to start of run
     * @return index of offset
     */
    public int getOffsetForAdvance(CharSequence text, int start, int end, int contextStart,
            int contextEnd, boolean isRtl, float advance) {
        if (text == null) {
            throw new IllegalArgumentException("text cannot be null");
        }
        if ((contextStart | start | end | contextEnd
                | start - contextStart | end - start | contextEnd - end
                | text.length() - contextEnd) < 0) {
            throw new IndexOutOfBoundsException();
        }
        // TODO performance: specialized alternatives to avoid buffer copy, if win is significant
        char[] buf = TemporaryBuffer.obtain(contextEnd - contextStart);
        TextUtils.getChars(text, contextStart, contextEnd, buf, 0);
        int result = getOffsetForAdvance(buf, start - contextStart, end - contextStart, 0,
                contextEnd - contextStart, isRtl, advance) + contextStart;
        TemporaryBuffer.recycle(buf);
        return result;
    }

    
Returns true of the passed Paint will have the same effect on text measurement 
Params:
other – A Paint object.
Returns:
true if the other Paint has the same effect on text measurement./**
     * Returns true of the passed {@link Paint} will have the same effect on text measurement
     *
     * @param other A {@link Paint} object.
     * @return true if the other {@link Paint} has the same effect on text measurement.
     */
    public boolean equalsForTextMeasurement(@NonNull Paint other) {
        return nEqualsForTextMeasurement(mNativePaint, other.mNativePaint);
    }

    // regular JNI
    private static native long nGetNativeFinalizer();
    private static native long nInit();
    private static native long nInitWithPaint(long paint);
    private static native int nBreakText(long nObject, char[] text, int index, int count,
            float maxWidth, int bidiFlags, float[] measuredWidth);
    private static native int nBreakText(long nObject, String text, boolean measureForwards,
            float maxWidth, int bidiFlags, float[] measuredWidth);
    private static native float nGetTextAdvances(long paintPtr, char[] text, int index, int count,
            int contextIndex, int contextCount, int bidiFlags, float[] advances, int advancesIndex);
    private static native float nGetTextAdvances(long paintPtr, String text, int start, int end,
            int contextStart, int contextEnd, int bidiFlags, float[] advances, int advancesIndex);
    private native int nGetTextRunCursor(long paintPtr, char[] text, int contextStart,
            int contextLength, int dir, int offset, int cursorOpt);
    private native int nGetTextRunCursor(long paintPtr, String text, int contextStart,
            int contextEnd, int dir, int offset, int cursorOpt);
    private static native void nGetTextPath(long paintPtr, int bidiFlags, char[] text, int index,
            int count, float x, float y, long path);
    private static native void nGetTextPath(long paintPtr, int bidiFlags, String text, int start,
            int end, float x, float y, long path);
    private static native void nGetStringBounds(long nativePaint, String text, int start, int end,
            int bidiFlags, Rect bounds);
    private static native void nGetCharArrayBounds(long nativePaint, char[] text, int index,
            int count, int bidiFlags, Rect bounds);
    private static native boolean nHasGlyph(long paintPtr, int bidiFlags, String string);
    private static native float nGetRunAdvance(long paintPtr, char[] text, int start, int end,
            int contextStart, int contextEnd, boolean isRtl, int offset);
    private static native int nGetOffsetForAdvance(long paintPtr, char[] text, int start, int end,
            int contextStart, int contextEnd, boolean isRtl, float advance);


    // ---------------- @FastNative ------------------------

    @FastNative
    private static native int nSetTextLocales(long paintPtr, String locales);
    @FastNative
    private static native void nSetFontFeatureSettings(long paintPtr, String settings);
    @FastNative
    private static native float nGetFontMetrics(long paintPtr, FontMetrics metrics);
    @FastNative
    private static native int nGetFontMetricsInt(long paintPtr, FontMetricsInt fmi);


    // ---------------- @CriticalNative ------------------------

    @CriticalNative
    private static native void nReset(long paintPtr);
    @CriticalNative
    private static native void nSet(long paintPtrDest, long paintPtrSrc);
    @CriticalNative
    private static native int nGetStyle(long paintPtr);
    @CriticalNative
    private static native void nSetStyle(long paintPtr, int style);
    @CriticalNative
    private static native int nGetStrokeCap(long paintPtr);
    @CriticalNative
    private static native void nSetStrokeCap(long paintPtr, int cap);
    @CriticalNative
    private static native int nGetStrokeJoin(long paintPtr);
    @CriticalNative
    private static native void nSetStrokeJoin(long paintPtr, int join);
    @CriticalNative
    private static native boolean nGetFillPath(long paintPtr, long src, long dst);
    @CriticalNative
    private static native long nSetShader(long paintPtr, long shader);
    @CriticalNative
    private static native long nSetColorFilter(long paintPtr, long filter);
    @CriticalNative
    private static native void nSetXfermode(long paintPtr, int xfermode);
    @CriticalNative
    private static native long nSetPathEffect(long paintPtr, long effect);
    @CriticalNative
    private static native long nSetMaskFilter(long paintPtr, long maskfilter);
    @CriticalNative
    private static native void nSetTypeface(long paintPtr, long typeface);
    @CriticalNative
    private static native int nGetTextAlign(long paintPtr);
    @CriticalNative
    private static native void nSetTextAlign(long paintPtr, int align);
    @CriticalNative
    private static native void nSetTextLocalesByMinikinLocaleListId(long paintPtr,
            int mMinikinLocaleListId);
    @CriticalNative
    private static native void nSetShadowLayer(long paintPtr,
            float radius, float dx, float dy, int color);
    @CriticalNative
    private static native boolean nHasShadowLayer(long paintPtr);
    @CriticalNative
    private static native float nGetLetterSpacing(long paintPtr);
    @CriticalNative
    private static native void nSetLetterSpacing(long paintPtr, float letterSpacing);
    @CriticalNative
    private static native float nGetWordSpacing(long paintPtr);
    @CriticalNative
    private static native void nSetWordSpacing(long paintPtr, float wordSpacing);
    @CriticalNative
    private static native int nGetHyphenEdit(long paintPtr);
    @CriticalNative
    private static native void nSetHyphenEdit(long paintPtr, int hyphen);
    @CriticalNative
    private static native void nSetStrokeMiter(long paintPtr, float miter);
    @CriticalNative
    private static native float nGetStrokeMiter(long paintPtr);
    @CriticalNative
    private static native void nSetStrokeWidth(long paintPtr, float width);
    @CriticalNative
    private static native float nGetStrokeWidth(long paintPtr);
    @CriticalNative
    private static native void nSetAlpha(long paintPtr, int a);
    @CriticalNative
    private static native void nSetDither(long paintPtr, boolean dither);
    @CriticalNative
    private static native int nGetFlags(long paintPtr);
    @CriticalNative
    private static native void nSetFlags(long paintPtr, int flags);
    @CriticalNative
    private static native int nGetHinting(long paintPtr);
    @CriticalNative
    private static native void nSetHinting(long paintPtr, int mode);
    @CriticalNative
    private static native void nSetAntiAlias(long paintPtr, boolean aa);
    @CriticalNative
    private static native void nSetLinearText(long paintPtr, boolean linearText);
    @CriticalNative
    private static native void nSetSubpixelText(long paintPtr, boolean subpixelText);
    @CriticalNative
    private static native void nSetUnderlineText(long paintPtr, boolean underlineText);
    @CriticalNative
    private static native void nSetFakeBoldText(long paintPtr, boolean fakeBoldText);
    @CriticalNative
    private static native void nSetFilterBitmap(long paintPtr, boolean filter);
    @CriticalNative
    private static native int nGetColor(long paintPtr);
    @CriticalNative
    private static native void nSetColor(long paintPtr, @ColorInt int color);
    @CriticalNative
    private static native int nGetAlpha(long paintPtr);
    @CriticalNative
    private static native void nSetStrikeThruText(long paintPtr, boolean strikeThruText);
    @CriticalNative
    private static native boolean nIsElegantTextHeight(long paintPtr);
    @CriticalNative
    private static native void nSetElegantTextHeight(long paintPtr, boolean elegant);
    @CriticalNative
    private static native float nGetTextSize(long paintPtr);
    @CriticalNative
    private static native float nGetTextScaleX(long paintPtr);
    @CriticalNative
    private static native void nSetTextScaleX(long paintPtr, float scaleX);
    @CriticalNative
    private static native float nGetTextSkewX(long paintPtr);
    @CriticalNative
    private static native void nSetTextSkewX(long paintPtr, float skewX);
    @CriticalNative
    private static native float nAscent(long paintPtr);
    @CriticalNative
    private static native float nDescent(long paintPtr);
    @CriticalNative
    private static native float nGetUnderlinePosition(long paintPtr);
    @CriticalNative
    private static native float nGetUnderlineThickness(long paintPtr);
    @CriticalNative
    private static native float nGetStrikeThruPosition(long paintPtr);
    @CriticalNative
    private static native float nGetStrikeThruThickness(long paintPtr);
    @CriticalNative
    private static native void nSetTextSize(long paintPtr, float textSize);
    @CriticalNative
    private static native boolean nEqualsForTextMeasurement(long leftPaintPtr, long rightPaintPtr);
}