com.google.gwt.corp.webgl.client.WebGLArray.java Source code

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Here is the source code for com.google.gwt.corp.webgl.client.WebGLArray.java

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/*
 * 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.corp.webgl.client;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArrayNumber;

/**
 * Artificial WebGLArray super class for type safety in WebGL calls with canvas array parameters.
 * Note that the slice method is moved to 
 * 
 * @author Stefan Haustein
 */
public abstract class WebGLArray<T extends WebGLArray<?>> extends JavaScriptObject {

    protected WebGLArray() {
    }

    /**
     * The WebGLArrayBuffer holding the data for this array. 
     */
    public final native WebGLArrayBuffer getBuffer() /*-{
                                                     return this.buffer;
                                                     }-*/;

    /**
     * The offset of this data, in bytes, from the start of this WebGLArray's WebGLArrayBuffer. 
     */
    public final native int getByteOffset() /*-{
                                            return this.byteOffset;
                                            }-*/;

    /**
     * The length of this data in bytes. 
     */
    public final native int getByteLength() /*-{
                                            return this.byteLength;
                                            }-*/;

    /**
     * The length of this data in elements. 
     */
    public final native int getLength() /*-{
                                        return this.length;
                                        }-*/;

    /**
     * Returns a new WebGLArray  view of the WebGLArrayBuffer  store for this WebGLArray, 
     * referencing the element at offset in the current view, and containing length elements. 
     */
    public final native T slice(int offset, int length) /*-{
                                                        return this.slice(offset, length);
                                                        }-*/;

    static JsArrayNumber toJsArray(int[] 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;
    }

    // TODO(haustein) remove when set works in FF
    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;
    }

    static JsArrayNumber toJsArray(byte[] 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;
    }

    static JsArrayNumber toJsArray(short[] 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;
    }

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

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

}