1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.camera.ui;
18
19import android.graphics.Bitmap;
20import android.graphics.Canvas;
21
22/** Using a canvas to draw the texture */
23public abstract class CanvasTexture extends Texture {
24    protected Canvas mCanvas;
25
26    public CanvasTexture(int width, int height) {
27        setSize(width, height);
28    }
29
30    @Override
31    protected Bitmap getBitmap() {
32        Bitmap bitmap = generateGLCompatibleBitmap(mWidth, mHeight);
33        mCanvas = new Canvas(bitmap);
34        onDraw(mCanvas, bitmap);
35        return bitmap;
36    }
37
38    @Override
39    protected void freeBitmap(Bitmap bitmap) {
40        bitmap.recycle();
41    }
42
43    abstract protected void onDraw(Canvas canvas, Bitmap backing);
44}
45