/*
* 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.gallery3d.glrenderer;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
// CanvasTexture is a texture whose content is the drawing on a Canvas.
// The subclasses should override onDraw() to draw on the bitmap.
// By default CanvasTexture is not opaque.
abstract class CanvasTexture extends UploadedTexture {
protected Canvas mCanvas;
private final Config mConfig;
public CanvasTexture(int width, int height) {
mConfig = Config.ARGB_8888;
setSize(width, height);
setOpaque(false);
}
@Override
protected Bitmap onGetBitmap() {
Bitmap bitmap = Bitmap.createBitmap(mWidth, mHeight, mConfig);
mCanvas = new Canvas(bitmap);
onDraw(mCanvas, bitmap);
return bitmap;
}
@Override
protected void onFreeBitmap(Bitmap bitmap) {
if (!inFinalizer()) {
bitmap.recycle();
}
}
abstract protected void onDraw(Canvas canvas, Bitmap backing);
}