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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.Camera;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.os.Bundle;
import android.view.View;
@SuppressWarnings({"UnusedDeclaration"})
public class Transform3dActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Transform3dView view = new Transform3dView(this);
setContentView(view);
}
static class Transform3dView extends View {
private final Bitmap mBitmap1;
private Camera mCamera;
private Matrix mMatrix;
Transform3dView(Context c) {
super(c);
mBitmap1 = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
mCamera = new Camera();
mMatrix = new Matrix();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawARGB(255, 255, 255, 255);
final float centerX = getWidth() / 2.0f - mBitmap1.getWidth() / 2.0f;
final float centerY = getHeight() / 2.0f - mBitmap1.getHeight() / 2.0f;
final Camera camera = mCamera;
final Matrix matrix = mMatrix;
rotate(centerX, centerY, camera, matrix, 32.0f);
drawBitmap(canvas, centerX, centerY, 0.0f, matrix);
rotate(centerX, centerY, camera, matrix, 12.0f);
drawBitmap(canvas, centerX, centerY, -mBitmap1.getWidth(), matrix);
rotate(centerX, centerY, camera, matrix, 52.0f);
drawBitmap(canvas, centerX, centerY, mBitmap1.getWidth(), matrix);
rotate(centerX, centerY, camera, matrix, 122.0f);
drawBitmap(canvas, centerX, centerY, mBitmap1.getWidth() * 2.0f, matrix);
}
private void drawBitmap(Canvas canvas, float centerX, float centerY, float offset,
Matrix matrix) {
canvas.save();
canvas.translate(offset, 0.0f);
canvas.concat(matrix);
canvas.drawBitmap(mBitmap1, centerX, centerY, null);
canvas.restore();
}
private void rotate(float centerX, float centerY, Camera camera,
Matrix matrix, float angle) {
camera.save();
camera.rotateY(angle);
camera.getMatrix(matrix);
camera.restore();
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}
}
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