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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.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader;
import android.os.Bundle;
import android.view.View;
@SuppressWarnings({"UnusedDeclaration"})
public class FramebufferBlendActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new BlendView(this));
}
static class BlendView extends View {
private int mTexWidth;
private int mTexHeight;
private Paint mPaint;
private LinearGradient mHorGradient;
private Bitmap mTexture;
BlendView(Context c) {
super(c);
mTexture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
mTexWidth = mTexture.getWidth();
mTexHeight = mTexture.getHeight();
mHorGradient = new LinearGradient(0.0f, 0.0f, mTexWidth, 0.0f,
Color.BLACK, Color.WHITE, Shader.TileMode.CLAMP);
mPaint = new Paint();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawRGB(255, 255, 255);
canvas.save();
canvas.translate(40.0f, 40.0f);
drawBlendedBitmap(canvas, PorterDuff.Mode.DARKEN);
drawBlendedBitmap(canvas, PorterDuff.Mode.LIGHTEN);
drawBlendedBitmap(canvas, PorterDuff.Mode.MULTIPLY);
canvas.restore();
canvas.save();
canvas.translate(40.0f + mTexWidth + 40.0f, 40.0f);
drawBlendedBitmap(canvas, PorterDuff.Mode.SCREEN);
drawBlendedBitmap(canvas, PorterDuff.Mode.ADD);
drawBlendedBitmapInverse(canvas, PorterDuff.Mode.OVERLAY);
canvas.restore();
}
private void drawBlendedBitmap(Canvas canvas, PorterDuff.Mode mode) {
mPaint.setShader(null);
mPaint.setXfermode(null);
canvas.drawBitmap(mTexture, 0.0f, 0.0f, mPaint);
mPaint.setShader(mHorGradient);
mPaint.setXfermode(new PorterDuffXfermode(mode));
canvas.drawRect(0.0f, 0.0f, mTexWidth, mTexHeight, mPaint);
canvas.translate(0.0f, 40.0f + mTexHeight);
}
private void drawBlendedBitmapInverse(Canvas canvas, PorterDuff.Mode mode) {
mPaint.setXfermode(null);
mPaint.setShader(mHorGradient);
canvas.drawRect(0.0f, 0.0f, mTexWidth, mTexHeight, mPaint);
mPaint.setXfermode(new PorterDuffXfermode(mode));
mPaint.setShader(null);
canvas.drawBitmap(mTexture, 0.0f, 0.0f, mPaint);
canvas.translate(0.0f, 40.0f + mTexHeight);
}
}
}
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