AndroidBitmap.java

/*
 * Copyright 2013 Hannes Janetzek
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.android.canvas;

import static android.graphics.Bitmap.Config.ARGB_8888;

import java.io.InputStream;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.opengl.GLES20;
import android.opengl.GLUtils;

public class AndroidBitmap implements org.oscim.backend.canvas.Bitmap {
	final Bitmap mBitmap;

	public AndroidBitmap(InputStream inputStream) {
		Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
		try {
			GLUtils.getType(bitmap);
		} catch (IllegalArgumentException e) {
			bitmap = bitmap.copy(ARGB_8888, false);
		}
		mBitmap = bitmap;
	}

	@Override
	public boolean isValid() {
		return mBitmap != null;
	}

	/**
	 * @param format ignored always ARGB8888
	 */
	public AndroidBitmap(int width, int height, int format) {
		mBitmap = android.graphics.Bitmap
		    .createBitmap(width, height, ARGB_8888);
	}

	public AndroidBitmap(android.graphics.Bitmap bitmap) {
		mBitmap = bitmap;
	}

	@Override
	public int getWidth() {
		return mBitmap.getWidth();
	}

	@Override
	public int getHeight() {
		return mBitmap.getHeight();
	}

	@Override
	public int[] getPixels() {
		int width = getWidth();
		int height = getHeight();
		int[] colors = new int[width * height];
		mBitmap.getPixels(colors, 0, width, 0, 0, width, height);
		return colors;
	}

	@Override
	public void eraseColor(int color) {
		//int a = android.graphics.Color.TRANSPARENT;
		mBitmap.eraseColor(color);
	}

	@Override
	public void uploadToTexture(boolean replace) {
		int format = GLUtils.getInternalFormat(mBitmap);
		int type = GLUtils.getType(mBitmap);

		if (replace)
			GLUtils.texSubImage2D(GLES20.GL_TEXTURE_2D, 0, 0, 0,
			                      mBitmap, format, type);
		else
			GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, format,
			                   mBitmap, type, 0);
	}

	@Override
	public void recycle() {
		if (mBitmap == null)
			return;

		mBitmap.recycle();
	}
}