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Based on https://github.com/MostafaGazar/CustomShapeImageView, Custom shape ImageView using PorterDuffXfermode and SVGs as masks
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<?xml version="1.0" encoding="utf-8"?> | |
<resources> | |
<declare-styleable name="SvgMaskedImageView"> | |
<attr name="mask" format="reference" /> | |
</declare-styleable> | |
</resources> |
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/* | |
* Copyright 2014 Mostafa Gazar | |
* | |
* 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 com.ninja.widget; | |
import android.annotation.SuppressLint; | |
import android.content.Context; | |
import android.content.res.TypedArray; | |
import android.graphics.Bitmap; | |
import android.graphics.Canvas; | |
import android.graphics.Color; | |
import android.graphics.Paint; | |
import android.graphics.PorterDuff.Mode; | |
import android.graphics.PorterDuffXfermode; | |
import android.graphics.RectF; | |
import android.graphics.Xfermode; | |
import android.graphics.drawable.Drawable; | |
import android.util.AttributeSet; | |
import android.widget.ImageView; | |
import com.larvalabs.svgandroid.SVG; | |
import com.larvalabs.svgandroid.SVGParser; | |
import com.ninja.sms.R; | |
import com.ninja.sms.utils.Log; | |
import java.lang.ref.WeakReference; | |
/** | |
* @author Mostafa Gazar <eng.mostafa.gazar@gmail.com> | |
*/ | |
public class SvgMaskedImageView extends ImageView { | |
private static final String TAG = SvgMaskedImageView.class.getSimpleName(); | |
public static final int DEFAULT_SVG_RAW_RES = R.raw.shape_circle; | |
private int mSvgRawRes = DEFAULT_SVG_RAW_RES; | |
protected Context mContext; | |
private static final Xfermode sXfermode = new PorterDuffXfermode(Mode.DST_IN); | |
private Bitmap mMaskBitmap; | |
private Paint mPaint; | |
private WeakReference<Bitmap> mSrcWeakBitmap; | |
private int mLastWidth; | |
private int mLastHeight; | |
public SvgMaskedImageView(Context context) { | |
super(context); | |
sharedConstructor(context, null); | |
} | |
public SvgMaskedImageView(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
sharedConstructor(context, attrs); | |
} | |
public SvgMaskedImageView(Context context, AttributeSet attrs, int defStyle) { | |
super(context, attrs, defStyle); | |
sharedConstructor(context, attrs); | |
} | |
private void sharedConstructor(Context context, AttributeSet attrs) { | |
mContext = context; | |
mPaint = new Paint(); | |
if (attrs != null) { | |
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SvgMaskedImageView); | |
mSvgRawRes = a != null ? a.getResourceId(R.styleable.SvgMaskedImageView_mask, DEFAULT_SVG_RAW_RES) : DEFAULT_SVG_RAW_RES; | |
a.recycle(); | |
} | |
} | |
public static void drawBitmap(Canvas canvas, Bitmap bitmap, | |
Paint paint) { | |
drawBitmap(canvas, bitmap, paint, 0, 0); | |
} | |
public static void drawBitmap(Canvas canvas, Bitmap bitmap, | |
Paint paint, int left, int top) { | |
paint.reset(); | |
paint.setFilterBitmap(false); | |
paint.setXfermode(sXfermode); | |
canvas.drawBitmap(bitmap, left, top, paint); | |
} | |
public void invalidate() { | |
mSrcWeakBitmap = null; | |
if (mMaskBitmap != null) { | |
mMaskBitmap.recycle(); | |
} | |
mLastWidth = 0; | |
mLastHeight = 0; | |
super.invalidate(); | |
} | |
@SuppressLint("DrawAllocation") | |
@Override | |
protected void onDraw(Canvas canvas) { | |
if (!isInEditMode()) { | |
int width = getWidth(); | |
int height = getHeight(); | |
int i = canvas.saveLayer(0.0F, 0.0F, width, height, null, Canvas.ALL_SAVE_FLAG); | |
try { | |
Bitmap srcBitmap = mSrcWeakBitmap != null ? mSrcWeakBitmap.get() : null; | |
if (srcBitmap == null || srcBitmap.isRecycled()) { | |
Drawable srcDrawable = getDrawable(); | |
if (srcDrawable != null) { | |
srcBitmap = Bitmap.createBitmap(getWidth(), | |
getHeight(), Bitmap.Config.ARGB_8888); | |
Canvas srcBitmapCanvas = new Canvas(srcBitmap); | |
srcDrawable.setBounds(0, 0, getWidth(), getHeight()); | |
srcDrawable.draw(srcBitmapCanvas); | |
// Skip and use cached mask. | |
if (mMaskBitmap == null || mMaskBitmap.isRecycled() || | |
mLastWidth != width || mLastHeight != height) { | |
mMaskBitmap = getMask(width, height); | |
} | |
drawBitmap(srcBitmapCanvas, mMaskBitmap, mPaint); | |
mSrcWeakBitmap = new WeakReference<Bitmap>(srcBitmap); | |
} | |
} | |
if (srcBitmap != null) { | |
mPaint.setXfermode(null); | |
canvas.drawBitmap(srcBitmap, 0.0F, 0.0F, mPaint); | |
} | |
} catch (Exception e) { | |
System.gc(); | |
Log.e(TAG, String.format("Unable to draw, view Id :: %s. Error occurred :: %s", getId(), e.toString())); | |
} finally { | |
canvas.restoreToCount(i); | |
} | |
} else { | |
super.onDraw(canvas); | |
} | |
} | |
private Bitmap getDefaultMask(int width, int height) { | |
Bitmap bitmap = Bitmap.createBitmap(width, height, | |
Bitmap.Config.ARGB_8888); | |
Canvas canvas = new Canvas(bitmap); | |
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); | |
paint.setColor(Color.BLACK); | |
canvas.drawRect(new RectF(0.0F, 0.0F, width, height), paint); | |
return bitmap; | |
} | |
private Bitmap getMask(int width, int height) { | |
SVG svgMask = null; | |
if (mLastWidth != width || mLastHeight != height) { | |
svgMask = SVGParser.getSVGFromInputStream( | |
mContext.getResources().openRawResource(mSvgRawRes), width, height); | |
mLastWidth = width; | |
mLastHeight = height; | |
} | |
if (svgMask != null) { | |
Bitmap bitmap = Bitmap.createBitmap(width, height, | |
Bitmap.Config.ARGB_8888); | |
Canvas canvas = new Canvas(bitmap); | |
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); | |
paint.setColor(Color.BLACK); | |
canvas.drawPicture(svgMask.getPicture()); | |
return bitmap; | |
} | |
// In case everything failed, return square. | |
return getDefaultMask(width, height); | |
} | |
public void updateMask(int svgRawRes) { | |
if (mSvgRawRes != svgRawRes) { | |
mSvgRawRes = svgRawRes; | |
invalidate(); | |
} | |
} | |
} |
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