Skip to content

Instantly share code, notes, and snippets.

@bpappin
Forked from MostafaGazar/SvgMaskedImageView.java
Created August 15, 2016 18:26
Show Gist options
  • Save bpappin/633b928ac92844e20de033c241bcc61a to your computer and use it in GitHub Desktop.
Save bpappin/633b928ac92844e20de033c241bcc61a to your computer and use it in GitHub Desktop.
Based on https://github.com/MostafaGazar/CustomShapeImageView, Custom shape ImageView using PorterDuffXfermode and SVGs as masks
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="SvgMaskedImageView">
<attr name="mask" format="reference" />
</declare-styleable>
</resources>
Display the source blob
Display the rendered blob
Raw
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
/*
* 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();
}
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment