| /* |
| * 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.canvas.dom.client; |
| |
| import com.google.gwt.core.client.JavaScriptObject; |
| |
| /** |
| * Array-like object holding the actual image data for an ImageData object. For |
| * each pixel, this object contains a red, green, blue and alpha value between 0 |
| * and 255 (in this order). Note that we use ints here to represent the data to |
| * avoid complexities stemming from bytes being signed in Java. |
| * |
| * @see <a href="http://www.w3.org/TR/2dcontext/#canvaspixelarray">HTML Canvas |
| * 2D CanvasPixelArray</a> |
| */ |
| public class CanvasPixelArray extends JavaScriptObject { |
| |
| protected CanvasPixelArray() { |
| } |
| |
| /** |
| * Returns the data value at index i. |
| * |
| * @param i the data index |
| * @return the data value |
| */ |
| public final native int get(int i) /*-{ |
| return this[i] || 0; |
| }-*/; |
| |
| /** |
| * Returns the length of the array. |
| * |
| * @return the array length |
| */ |
| public final native int getLength() /*-{ |
| return this.length; |
| }-*/; |
| |
| /** |
| * Sets the data value at position i to the given value. |
| * |
| * Most browsers will clamp this value to the range 0...255, but that is not |
| * enforced in this implementation. |
| * |
| * @param i index to set. |
| * @param value value to set (use values from 0 to 255) |
| */ |
| public final native void set(int i, int value) /*-{ |
| // FF3.0 doesn't clamp the range. We don't manually clamp it to maximize |
| // performance. |
| this[i] = value; |
| }-*/; |
| } |