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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.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Shader;
import android.os.Bundle;
import android.view.View;
@SuppressWarnings({"UnusedDeclaration"})
public class ShadersActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new ShadersView(this));
}
public static class ShadersView extends View {
private BitmapShader mRepeatShader;
private BitmapShader mTranslatedShader;
private BitmapShader mScaledShader;
private int mTexWidth;
private int mTexHeight;
private Paint mPaint;
private float mDrawWidth;
private float mDrawHeight;
private LinearGradient mHorGradient;
private LinearGradient mDiagGradient;
private LinearGradient mVertGradient;
private Bitmap mTexture;
private Matrix mMtx1;
private Matrix mMtx2;
private Matrix mMtx3;
public ShadersView(Context c) {
super(c);
mTexture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
mTexWidth = mTexture.getWidth();
mTexHeight = mTexture.getHeight();
mDrawWidth = mTexWidth * 2.2f;
mDrawHeight = mTexHeight * 1.2f;
mRepeatShader = new BitmapShader(mTexture, Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);
mTranslatedShader = new BitmapShader(mTexture, Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);
mMtx1 = new Matrix();
mMtx1.setTranslate(mTexWidth / 2.0f, mTexHeight / 2.0f);
mMtx1.postRotate(45, 0, 0);
mTranslatedShader.setLocalMatrix(mMtx1);
mScaledShader = new BitmapShader(mTexture, Shader.TileMode.MIRROR,
Shader.TileMode.MIRROR);
mMtx2 = new Matrix();
mMtx2.setScale(0.5f, 0.5f);
mScaledShader.setLocalMatrix(mMtx2);
mHorGradient = new LinearGradient(0.0f, 0.0f, 1.0f, 0.0f,
Color.RED, Color.GREEN, Shader.TileMode.CLAMP);
mMtx3 = new Matrix();
mMtx3.setScale(mDrawHeight, 1.0f);
mMtx3.postRotate(-90.0f);
mMtx3.postTranslate(0.0f, mDrawHeight);
mHorGradient.setLocalMatrix(mMtx3);
mDiagGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth / 1.5f, mDrawHeight,
Color.BLUE, Color.MAGENTA, Shader.TileMode.CLAMP);
mVertGradient = new LinearGradient(0.0f, 0.0f, 0.0f, mDrawHeight / 2.0f,
Color.YELLOW, Color.MAGENTA, Shader.TileMode.MIRROR);
mPaint = new Paint();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//canvas.drawRGB(255, 255, 255);
canvas.drawBitmap(mTexture, 0.0f, 0.0f, null);
// Bitmap shaders
canvas.save();
canvas.translate(40.0f, 40.0f);
mPaint.setShader(mRepeatShader);
canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
canvas.translate(0.0f, 40.0f + mDrawHeight);
mPaint.setShader(mTranslatedShader);
canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
canvas.translate(0.0f, 40.0f + mDrawHeight);
mPaint.setShader(mScaledShader);
canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
canvas.restore();
// Gradients
canvas.save();
canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f);
mPaint.setShader(mHorGradient);
canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
canvas.translate(0.0f, 40.0f + mDrawHeight);
mPaint.setShader(mDiagGradient);
canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
canvas.translate(0.0f, 40.0f + mDrawHeight);
mPaint.setShader(mVertGradient);
canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
canvas.restore();
}
}
}
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