android.graphics.Paint Java Examples

private static String getEllipsizedText(Paint paint, String title, float maxWidth) {
  final float textWidth = paint.measureText(title);
  if (textWidth <= maxWidth) {
    return title;
  }

  // Find the maximum length with an ellipsis.
  final float ellipsisWidth = paint.measureText(ELLIPSIS);
  final int length = paint.breakText(title, true, (maxWidth - ellipsisWidth), null);

  // Try to land on a word break.
  // TODO: Use breaking iterator for better i18n support.
  final int space = title.lastIndexOf(' ', length);
  if (space > 0) {
    return title.substring(0, space) + ELLIPSIS;
  }

  // Otherwise, cut off characters.
  return title.substring(0, length) + ELLIPSIS;
}
 

public void initView(Context context) {
    this.context = context;
    checked = false;
    tick = new Path();
    paint = new Paint();
    bounds = new RectF();
    OnClickListener onClickListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            setChecked(!checked);
            onCheckedChangeListener.onCheckedChanged(MaterialCheckbox.this, isChecked());
        }
    };

    setOnClickListener(onClickListener);
}
 

@Override
public int getSize(final Paint paint, final CharSequence text, final int start,
                   final int end, final Paint.FontMetricsInt fontMetrics) {
    if (fontMetrics != null) {
        final Paint.FontMetrics paintFontMetrics = paint.getFontMetrics();
        final float fontHeight = paintFontMetrics.descent - paintFontMetrics.ascent;
        final float centerY = paintFontMetrics.ascent + fontHeight / 2;

        fontMetrics.ascent = (int) (centerY - mEmoticonSize / 2);
        fontMetrics.top = fontMetrics.ascent;
        fontMetrics.bottom = (int) (centerY + mEmoticonSize / 2);
        fontMetrics.descent = fontMetrics.bottom;
    }

    return (int) mEmoticonSize;
}
 

public MetronomeView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    paint = new Paint();
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(2);
    paint.setAntiAlias(true);
    paint.setColor(Color.BLACK);

    accentPaint = new Paint();
    accentPaint.setStyle(Paint.Style.STROKE);
    accentPaint.setStrokeWidth(8);
    accentPaint.setAntiAlias(true);
    accentPaint.setColor(Color.BLACK);

    subscribe();
}
 

/**
 * @param context
 *            used to get the configuration for the drawable from
 */
public DrawerArrowDrawable(Context context) {
	final TypedArray typedArray = context.getTheme().obtainStyledAttributes(null,
			R.styleable.DrawerArrowToggle, R.attr.drawerArrowStyle,
			R.style.Base_Widget_AppCompat_DrawerArrowToggle);
	mPaint.setAntiAlias(true);
	mPaint.setColor(typedArray.getColor(R.styleable.DrawerArrowToggle_color, 0));
	mSize = typedArray.getDimensionPixelSize(R.styleable.DrawerArrowToggle_drawableSize, 0);
	mBarSize =0;// typedArray.getDimension(R.styleable.DrawerArrowToggle_barSize, 0);
	mTopBottomArrowSize = //typedArray.getDimension(R.styleable.DrawerArrowToggle_topBottomBarArrowSize, 0);
	mBarThickness = typedArray.getDimension(R.styleable.DrawerArrowToggle_thickness, 0);
	mBarGap = typedArray.getDimension(R.styleable.DrawerArrowToggle_gapBetweenBars, 0);
	mSpin = typedArray.getBoolean(R.styleable.DrawerArrowToggle_spinBars, true);
	mMiddleArrowSize =0;// typedArray.getDimension(R.styleable.DrawerArrowToggle_middleBarArrowSize, 0);
	typedArray.recycle();
	mPaint.setStyle(Paint.Style.STROKE);
	mPaint.setStrokeJoin(Paint.Join.ROUND);
	mPaint.setStrokeCap(Paint.Cap.SQUARE);
	mPaint.setStrokeWidth(mBarThickness);
}
 

/**
 * Calculate views bounds and scroll them according to the current index
 *
 * @param paint
 * @return
 */
private ArrayList<Rect> calculateAllBounds(Paint paint) {
    ArrayList<Rect> list = new ArrayList<Rect>();
    //For each views (If no values then add a fake one)
    final int count = InfiniteViewPager.FakePositionHelper.getAdapterSize(mViewPager);
    final int width = getWidth();
    final int halfWidth = width / 2;
    for (int i = 0; i < count; i++) {
        Rect bounds = calcBounds(i, paint);
        int w = bounds.right - bounds.left;
        int h = bounds.bottom - bounds.top;
        bounds.left = (int)(halfWidth - (w / 2f) + ((i - mCurrentPage - mPageOffset) * width));
        bounds.right = bounds.left + w;
        bounds.top = 0;
        bounds.bottom = h;
        list.add(bounds);
    }

    return list;
}
 

/**
 */
private void setupTargetBitmap(int alpha) {
    if (mBitmap == null) {
        mBitmap = textAsBitmap("-");
    }
    if (mIconBitmap == null) {
        mIconBitmap = textAsBitmap("-");
    }
    mBitmap = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(), Config.ARGB_8888);
    Canvas mCanvas = new Canvas(mBitmap);
    Paint mPaint = new Paint();
    mPaint.setColor(mIconColor);
    mPaint.setAntiAlias(true);
    mPaint.setDither(true);
    mPaint.setAlpha(alpha);
    mCanvas.drawRect(mIconRect, mPaint);
    mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
    mPaint.setAlpha(255);
    mCanvas.drawBitmap(mIconBitmap, null, mIconRect, mPaint);

}
 

public PaperProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);

    final TypedArray a = context.getTheme().obtainStyledAttributes(
            attrs, R.styleable.PaperProgressBar, defStyleAttr, 0);
    try {
        mProgressColor = a.getColor(R.styleable.PaperProgressBar_pw_progressColor, 0xFF0F9D58);
        // Secondary progress by default is same color, but half transparent
        mSecondaryProgressColor = a.getColor(R.styleable.PaperProgressBar_pw_secondaryProgressColor,
                0x7F000000 | (mProgressColor & 0xFFFFFF));
    } finally {
        a.recycle();
    }

    mColorPaint.setColor(mProgressColor);
    mColorPaint.setStyle(Paint.Style.FILL);
    mColorPaint.setAntiAlias(true);

    mIndeterminateProgress = 0;
    if (isIndeterminate()) {
        mIndeterminateHandler.sendEmptyMessage(0);
    }
}
 

private void initConfig() {
    textPaint.setColor(textColor);
    textPaint.setTextSize(textSize);
    Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();

    String testText = "菜单选项";
    Rect rect = new Rect();
    textPaint.getTextBounds(testText, 0, testText.length(), rect);
    itemHeight = rect.height() + itemVerticalSpace;
    textBaseLine = -itemHeight / 2.0f + (itemHeight - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;

    if (showCount < 5) {
        showCount = 5;
    }
    if (showCount % 2 == 0) {
        showCount++;
    }
    drawCount = showCount + 2;
    defaultRectArray = new Rect[drawCount];
    drawRectArray = new Rect[drawCount];
    for (int i = 0; i < drawCount; i++) {
        defaultRectArray[i] = new Rect();
        drawRectArray[i] = new Rect();
    }
}
 

private void dimChildView(View v, float mag, int fadeColor) {
    final LayoutParams lp = (LayoutParams) v.getLayoutParams();

    if (mag > 0 && fadeColor != 0) {
        final int baseAlpha = (fadeColor & 0xff000000) >>> 24;
        int imag = (int) (baseAlpha * mag);
        int color = imag << 24 | (fadeColor & 0xffffff);
        if (lp.dimPaint == null) {
            lp.dimPaint = new Paint();
        }
        lp.dimPaint.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_OVER));
        if (ViewCompat.getLayerType(v) != ViewCompat.LAYER_TYPE_HARDWARE) {
            ViewCompat.setLayerType(v, ViewCompat.LAYER_TYPE_HARDWARE, lp.dimPaint);
        }
        invalidateChildRegion(v);
    } else if (ViewCompat.getLayerType(v) != ViewCompat.LAYER_TYPE_NONE) {
        if (lp.dimPaint != null) {
            lp.dimPaint.setColorFilter(null);
        }
        final DisableLayerRunnable dlr = new DisableLayerRunnable(v);
        mPostedRunnables.add(dlr);
        ViewCompat.postOnAnimation(this, dlr);
    }
}
 

public SketchShapeBitmapDrawable(@NonNull Context context, @NonNull BitmapDrawable bitmapDrawable, @Nullable ShapeSize shapeSize, @Nullable ImageShaper shaper) {
    Bitmap bitmap = bitmapDrawable.getBitmap();
    if (bitmap == null || bitmap.isRecycled()) {
        throw new IllegalArgumentException(bitmap == null ? "bitmap is null" : "bitmap recycled");
    }

    if (shapeSize == null && shaper == null) {
        throw new IllegalArgumentException("shapeSize is null and shapeImage is null");
    }

    this.bitmapDrawable = bitmapDrawable;
    this.paint = new Paint(DEFAULT_PAINT_FLAGS);
    this.srcRect = new Rect();
    this.resizeCalculator = Sketch.with(context).getConfiguration().getResizeCalculator();

    setShapeSize(shapeSize);
    setShaper(shaper);

    if (bitmapDrawable instanceof SketchRefDrawable) {
        this.refDrawable = (SketchRefDrawable) bitmapDrawable;
    }

    if (bitmapDrawable instanceof SketchDrawable) {
        this.sketchDrawable = (SketchDrawable) bitmapDrawable;
    }
}
 

public void addNowLine(long now) {
    LineGraphSeries<DataPoint> seriesNow;
    DataPoint[] nowPoints = new DataPoint[]{
            new DataPoint(now, 0),
            new DataPoint(now, maxY)
    };

    seriesNow = new LineGraphSeries<>(nowPoints);
    seriesNow.setDrawDataPoints(false);
    // custom paint to make a dotted line
    Paint paint = new Paint();
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(2);
    paint.setPathEffect(new DashPathEffect(new float[]{10, 20}, 0));
    paint.setColor(Color.WHITE);
    seriesNow.setCustomPaint(paint);

    addSeries(seriesNow);
}
 

/**
 * Do not support cross Span.
 *
 * @param text       text
 * @param parentSpan parentSpan
 * @param start      start index of parentSpan
 * @param end        end index of parentSpan
 * @param paint      TextPaint
 * @return recursive calculated width
 */
public int recursiveGetSizeWithReplacementSpan(CharSequence text, ReplacementSpan parentSpan, @IntRange(from = 0) int start, @IntRange(from = 0) int end, Paint paint) {
  if (text instanceof Spanned) {
    Spanned spannedText = (Spanned) text;
    List<ReplacementSpan> spans = getSortedReplacementSpans(spannedText, start, end);
    if (!spans.isEmpty()) {
      int lastIndexCursor = 0;
      int width = 0;
      for (ReplacementSpan span : spans) {
        if (span == parentSpan) {
          continue;
        }
        int spanStart = spannedText.getSpanStart(span);
        int spanEnd = spannedText.getSpanEnd(span);
        width += parentSpan.getSize(paint, text, lastIndexCursor, spanStart, null);
        width += span.getSize(paint, text, spanStart, spanEnd, null);
        lastIndexCursor = spanEnd;
      }
      if (lastIndexCursor < end) {
        width += parentSpan.getSize(paint, text, lastIndexCursor, end, null);
      }
      return width;
    }
  }
  return parentSpan.getSize(paint, text, start, end, null);
}
 

public void init() {
    mFramesCouner = 0;
    mFrequency = Core.getTickFrequency();
    mprevFrameTime = Core.getTickCount();
    mStrfps = "";

    mPaint = new Paint();
    mPaint.setColor(Color.BLUE);
    mPaint.setTextSize(20);
}
 

/*********************************************************
 * Painting
 *********************************************************/

@Override
protected void onDraw(Canvas can)
{
    rect.set(getPaddingLeft(), getPaddingTop(), this.getRight() - this.getLeft() - getPaddingRight(),
            this.getBottom() - this.getTop() - getPaddingBottom());

    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(0);
    paint.setAntiAlias(true);

    if (isHorizontal)
    {
        drawHorizontalBar(can, paint);
    }
    else
    {
        drawVerticalBar(can, paint);
    }
    if (function != null && function.getMinMaxValues(FunctionIf.Z) != null)
    {
        drawLabels(can, paint, function.getMinMaxValues(FunctionIf.Z));
    }

    // Test code to trace paddings:
    // paint.setStyle(Paint.Style.STROKE);
    // paint.setStrokeWidth(0);
    // paint.setColor(Color.BLUE);
    // can.drawRect(0, 0, this.getWidth(), this.getHeight(), paint);
    // paint.setColor(Color.GREEN);
    // can.drawRect(getPaddingLeft(), getPaddingTop(), this.getRight() - this.getLeft() - getPaddingRight(),
    // this.getBottom() - this.getTop() - getPaddingBottom(), paint);
}
 

private void setup() {
    if (!mReady) {
        mSetupPending = true;
        return;
    }

    if (mBitmap == null) {
        return;
    }

    mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

    mBitmapPaint.setAntiAlias(true);
    mBitmapPaint.setShader(mBitmapShader);

    mBorderPaint.setStyle(Paint.Style.STROKE);
    mBorderPaint.setAntiAlias(true);
    mBorderPaint.setColor(mBorderColor);
    mBorderPaint.setStrokeWidth(mBorderWidth);

    mBitmapHeight = mBitmap.getHeight();
    mBitmapWidth = mBitmap.getWidth();

    mBorderRect.set(0, 0, getWidth(), getHeight());
    // mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);

    mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width() - mBorderWidth, mBorderRect.height() - mBorderWidth);
    // mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);

    updateShaderMatrix();
    invalidate();
}
 

protected void initializePaints() {
    arcPaint = new Paint();
    arcPaint.setAntiAlias(true);
    arcPaint.setStyle(Paint.Style.STROKE);
    arcPaint.setStrokeWidth(arcWidth);
    arcPaint.setColor(BLUE_ONE);

    arrowPaint = new Paint();
    arrowPaint.setAntiAlias(true);
    arrowPaint.setStyle(Paint.Style.STROKE);
    arrowPaint.setStrokeWidth(arrowWidth);
    arrowPaint.setColor(WHILE);

    smallPaint = new Paint();
    smallPaint.setAntiAlias(true);
    smallPaint.setStyle(Paint.Style.FILL);
    smallPaint.setColor(WHILE);

    triPaint = new Paint();
    triPaint.setAntiAlias(true);
    triPaint.setStyle(Paint.Style.STROKE);
    triPaint.setStrokeWidth(triWidth);
    triPaint.setColor(WHILE);

    loadingPaint = new Paint();
    loadingPaint.setAntiAlias(true);
    loadingPaint.setStyle(Paint.Style.STROKE);
    loadingPaint.setStrokeWidth(loadingWidth);
    loadingPaint.setColor(WHILE);

    textPaint = new Paint();
    textPaint.setAntiAlias(true);
    textPaint.setStyle(Paint.Style.FILL);
    textPaint.setStrokeWidth(1);
    textPaint.setColor(WHILE);
    textPaint.setTextSize(textSize);
}
 

public PopupBackground(Context context)
{
	Resources res = context.getResources();
	mCorner = res.getDimensionPixelSize(R.dimen.person_bubble_corner);
	mPaint.setColor(res.getColor(R.color.person_bubble_bg));
	mPaint.setStyle(Paint.Style.FILL);
}
 

@NonNull
private void removeAll(Canvas canvas) {
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(Mode.CLEAR));
    canvas.drawPaint(paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC));
}
 

/**
 * 绘制焦点框
 */
@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    if (Style.RECTANGLE == mStyle) {
        mFocusPath.addRect(mFocusRect, Path.Direction.CCW);
        canvas.save();
        canvas.clipRect(0, 0, getWidth(), getHeight());
        canvas.clipPath(mFocusPath, Region.Op.DIFFERENCE);
        canvas.drawColor(mMaskColor);
        canvas.restore();
    } else if (Style.CIRCLE == mStyle) {
        float radius = Math.min((mFocusRect.right - mFocusRect.left) / 2, (mFocusRect.bottom - mFocusRect.top) / 2);
        mFocusPath.addCircle(mFocusMidPoint.x, mFocusMidPoint.y, radius, Path.Direction.CCW);
        canvas.save();
        canvas.clipRect(0, 0, getWidth(), getHeight());
        canvas.clipPath(mFocusPath, Region.Op.DIFFERENCE);
        canvas.drawColor(mMaskColor);
        canvas.restore();
    }
    mBorderPaint.setColor(mBorderColor);
    mBorderPaint.setStyle(Paint.Style.STROKE);
    mBorderPaint.setStrokeWidth(mBorderWidth);
    mBorderPaint.setAntiAlias(true);
    canvas.drawPath(mFocusPath, mBorderPaint);
    mFocusPath.reset();
}
 

private Drawable createOuterStrokeDrawable(float strokeWidth) {
        ShapeDrawable shapeDrawable = new ShapeDrawable(new OvalShape());

        final Paint paint = shapeDrawable.getPaint();
        paint.setAntiAlias(true);
        paint.setStrokeWidth(strokeWidth);
        paint.setStyle(Style.STROKE);
        paint.setColor(Color.BLACK);
        paint.setAlpha(opacityToAlpha(0.02f));

        return shapeDrawable;
}
 

@Override
public Bitmap transform(Bitmap source) {
    int size = Math.min(source.getWidth(), source.getHeight());

    int x = (source.getWidth() - size) / 2;
    int y = (source.getHeight() - size) / 2;

    Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
    if (squaredBitmap != source) {
        source.recycle();
    }

    Bitmap.Config config = source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888;
    Bitmap bitmap = Bitmap.createBitmap(size, size, config);

    Canvas canvas = new Canvas(bitmap);
    Paint paint = new Paint();
    BitmapShader shader = new BitmapShader(squaredBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
    paint.setShader(shader);
    paint.setAntiAlias(true);

    float r = size / 2f;
    canvas.drawCircle(r, r, r, paint);

    squaredBitmap.recycle();
    return bitmap;
}
 

/**
 * Creates a rounded square of a certain color with
 * a character imprinted in white on it.
 *
 * @param character the character to write on the image.
 * @param width     the width of the final image.
 * @param height    the height of the final image.
 * @param color     the background color of the rounded square.
 * @return a valid bitmap of a rounded square with a character on it.
 */
@NonNull
public static Bitmap getRoundedLetterImage(@NonNull Character character, int width, int height, int color) {
    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(image);
    Paint paint = new Paint();
    paint.setColor(color);
    Typeface boldText = Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD);
    paint.setTypeface(boldText);
    paint.setTextSize(Utils.dpToPx(14));
    paint.setAntiAlias(true);
    paint.setTextAlign(Paint.Align.CENTER);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));

    int radius = Utils.dpToPx(2);

    RectF outer = new RectF(0, 0, canvas.getWidth(), canvas.getHeight());
    canvas.drawRoundRect(outer, radius, radius, paint);

    int xPos = (canvas.getWidth() / 2);
    int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));

    paint.setColor(Color.WHITE);
    canvas.drawText(character.toString(), xPos, yPos, paint);

    return image;
}
 

public OverlayView(final Context context, final AttributeSet attrs) {
    super(context, attrs);

    textSizePx =
            TypedValue.applyDimension(
                    TypedValue.COMPLEX_UNIT_DIP, TEXT_SIZE_DIP, getResources().getDisplayMetrics());
    fgPaint = new Paint();
    fgPaint.setTextSize(textSizePx);
    fgPaint.setColor(ContextCompat.getColor(context, R.color.textColorPrimary));

    bgPaint = new Paint();
    bgPaint.setColor(Color.TRANSPARENT);
}
 

private void init() {
    setLayerType(View.LAYER_TYPE_SOFTWARE, null);
    mXfermode = new PorterDuffXfermode(PorterDuff.Mode.DST_OUT);
    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setStyle(Paint.Style.FILL);
    mCircleColor = ViewUtils.getDefaultColor(getContext());
    mIsMask = true;
}
 

private static void drawCircle(Paint st, Canvas g2, float x, float y) {
	st.setColor(blue);
	g2.translate(x, y);
	g2.drawCircle(0, 0, 8, st);
	st.setColor(Color.BLACK);
	st.setStyle(Style.STROKE);
	g2.drawCircle(0, 0, 8, st);
	g2.translate(-x, -y);
}
 

@Override
protected Path getPath(Canvas canvas, Paint paint) {
  Path path = new Path();
  float x1 = ParserHelper.fromPercentageToFloat(mX1, mCanvasWidth, 0, mScale);
  float y1 = ParserHelper.fromPercentageToFloat(mY1, mCanvasHeight, 0, mScale);
  float x2 = ParserHelper.fromPercentageToFloat(mX2, mCanvasWidth, 0, mScale);
  float y2 = ParserHelper.fromPercentageToFloat(mY2, mCanvasHeight, 0, mScale);

  path.moveTo(x1, y1);
  path.lineTo(x2, y2);
  return path;
}
 

private Paint getRipplePaint() {
    try {
        Method method = RippleDrawable.class.getDeclaredMethod("getRipplePaint");
        method.setAccessible(true);
        return (Paint) method.invoke(this);
    } catch (NoSuchMethodException
            | InvocationTargetException
            | IllegalAccessException ignored) {
    }
    // Normally should never happen.
    return new Paint();
}
 

RoundRectDrawableWithShadow(Resources resources, int backgroundColor, float radius) {
    mShadowStartColor = resources.getColor(R.color.cardview_shadow_start_color);
    mShadowEndColor = resources.getColor(R.color.cardview_shadow_end_color);
    mShadowSize = resources.getDimension(R.dimen.cardview_shadow_size) * SHADOW_MULTIPLIER;


    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
    mPaint.setColor(backgroundColor);
    mCornerShadowPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
    mCornerShadowPaint.setStyle(Paint.Style.FILL);
    mCornerShadowPaint.setDither(true);
    mCornerRadius = radius;
    mPreShadowBounds = new RectF();
    mEdgeShadowPaint = new Paint(mCornerShadowPaint);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();
  int size = Math.min(source.getWidth(), source.getHeight());

  int width = (source.getWidth() - size) / 2;
  int height = (source.getHeight() - size) / 2;

  Bitmap bitmap = mBitmapPool.get(size, size, Bitmap.Config.ARGB_8888);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
  }

  Canvas canvas = new Canvas(bitmap);
  Paint paint = new Paint();
  BitmapShader shader =
      new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
  if (width != 0 || height != 0) {
    // source isn't square, move viewport to center
    Matrix matrix = new Matrix();
    matrix.setTranslate(-width, -height);
    shader.setLocalMatrix(matrix);
  }
  paint.setShader(shader);
  paint.setAntiAlias(true);

  float r = size / 2f;
  canvas.drawCircle(r, r, r, paint);

  return BitmapResource.obtain(bitmap, mBitmapPool);
}