ArrayUtils.java

/*
 * Copyright 2010 Google Inc.
 *
 * 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.google.gwt.webgl.client;

import com.google.gwt.core.client.JsArrayInteger;
import com.google.gwt.core.client.JsArrayNumber;
import com.google.gwt.typedarrays.client.JsUtils;
import com.google.gwt.typedarrays.shared.Float32Array;
import com.google.gwt.typedarrays.shared.Int32Array;
import com.google.gwt.typedarrays.shared.Uint16Array;
import com.google.gwt.typedarrays.shared.Uint8Array;

public class ArrayUtils {

	// TODO(jgw): Get rid of these conversions in web mode.
	public static JsArrayInteger toJsArray(byte[] data) {
		JsArrayInteger jsan = (JsArrayInteger) JsArrayInteger.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i]);
		}
		return jsan;
	}

	public static JsArrayNumber toJsArray(double[] data) {
		JsArrayNumber jsan = (JsArrayNumber) JsArrayNumber.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i]);
		}
		return jsan;
	}

	public static JsArrayNumber toJsArray(float[] data) {
		JsArrayNumber jsan = (JsArrayNumber) JsArrayNumber.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i]);
		}
		return jsan;
	}

	public static JsArrayInteger toJsArray(int[] data) {
		JsArrayInteger jsan = (JsArrayInteger) JsArrayInteger.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i]);
		}
		return jsan;
	}

	public static JsArrayInteger toJsArray(short[] data) {
		JsArrayInteger jsan = (JsArrayInteger) JsArrayInteger.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i]);
		}
		return jsan;
	}

	public static JsArrayInteger toJsArrayUnsigned(byte[] data) {
		JsArrayInteger jsan = (JsArrayInteger) JsArrayInteger.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i] & 255);
		}
		return jsan;
	}

	public static JsArrayInteger toJsArrayUnsigned(short[] data) {
		JsArrayInteger jsan = (JsArrayInteger) JsArrayInteger.createArray();
		int len = data.length;
		for (int i = len - 1; i >= 0; i--) {
			jsan.set(i, data[i] & 65535);
		}
		return jsan;
	}

	private ArrayUtils() {
	}

	public static Float32Array createFloat32Array(float[] array) {
		return JsUtils.createFloat32Array(toJsArray(array));
	}

	public static Int32Array createInt32Array(int[] array) {
		return JsUtils.createInt32Array(toJsArray(array));
	}

	public static Uint16Array createUint16Array(short[] array) {
		return JsUtils.createUint16Array(toJsArrayUnsigned(array));
	}

	public static Uint16Array createUint16Array(int[] array) {
		return JsUtils.createUint16Array(toJsArray(array));
	}

	public static Uint8Array createUint8Array(byte[] array) {
		return JsUtils.createUint8Array(toJsArrayUnsigned(array));
	}

	public static Uint8Array createUint8Array(int[] array) {
		return JsUtils.createUint8Array(toJsArray(array));
	}
}