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/*
* Copyright (C) 2010 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 com.android.test.hwui;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.FrameLayout;
@SuppressWarnings({"UnusedDeclaration"})
public class BitmapMutateActivity extends Activity {
private static final int PATTERN_SIZE = 400;
private ObjectAnimator mAnimator;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final BitmapsView view = new BitmapsView(this);
final FrameLayout layout = new FrameLayout(this);
layout.addView(view, new FrameLayout.LayoutParams(480, 800, Gravity.CENTER));
setContentView(layout);
mAnimator = ObjectAnimator.ofInt(view, "offset", 0, PATTERN_SIZE - 1);
mAnimator.setDuration(1500);
mAnimator.setRepeatCount(ObjectAnimator.INFINITE);
mAnimator.setRepeatMode(ObjectAnimator.REVERSE);
mAnimator.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
mAnimator.cancel();
}
static class BitmapsView extends View {
private final Paint mBitmapPaint;
private final Bitmap mBitmap1;
private final int[] mPixels;
private int mOffset;
private int mSlice;
private static final int[] mShifts = new int[] { 16, 8, 0 };
BitmapsView(Context c) {
super(c);
mBitmap1 = Bitmap.createBitmap(PATTERN_SIZE, PATTERN_SIZE, Bitmap.Config.ARGB_8888);
mBitmapPaint = new Paint();
mPixels = new int[mBitmap1.getWidth() * mBitmap1.getHeight()];
mSlice = mBitmap1.getWidth() / 3;
}
public void setOffset(int offset) {
mOffset = offset;
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int width = mBitmap1.getWidth();
int height = mBitmap1.getHeight();
canvas.translate((getWidth() - width) / 2, 0);
for (int x = 0; x < width; x++) {
int color = 0xff000000;
int i = x == 0 ? 0 : x - 1;
color |= (int) ((0xff * ((i + mOffset) % mSlice) / (float) mSlice)) <<
mShifts[i / mSlice];
for (int y = 0; y < height; y++) {
mPixels[y * width + x] = color;
}
}
mBitmap1.setPixels(mPixels, 0, width, 0, 0, width, height);
canvas.drawBitmap(mBitmap1, 0.0f, 0.0f, mBitmapPaint);
canvas.save();
canvas.translate(0.0f, height + 32);
canvas.drawBitmap(mPixels, 0, width, 0.0f, 0.0f, width, height, false, mBitmapPaint);
canvas.restore();
}
}
}
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