Example usage for com.google.gwt.canvas.dom.client Context2d createImageData

Introduction

In this page you can find the example usage for com.google.gwt.canvas.dom.client Context2d createImageData.

Prototype

public final native ImageData createImageData(int w, int h) ;

Source Link

Document

Creates an image data object of the given size.

Usage

From source file:net.npe.gwt.canvas.CanvasCreator.java

License:MIT License

public static Canvas createImageCanvas(int[] pixels, int width, int height) {

    Canvas canvas = Canvas.createIfSupported();

    if (canvas == null)
        return null;

    canvas.setCoordinateSpaceWidth(width);
    canvas.setCoordinateSpaceHeight(height);

    Context2d context = canvas.getContext2d();
    ImageData data = context.createImageData(width, height);

    CanvasPixelArray array = data.getData();
    for (int i = 0; i < width * height; i++) { // ABGR
        array.set(4 * i + 0, pixels[i] & 0xFF);
        array.set(4 * i + 1, (pixels[i] >> 8) & 0xFF);
        array.set(4 * i + 2, (pixels[i] >> 16) & 0xFF);
        array.set(4 * i + 3, (pixels[i] >> 24) & 0xFF);
    }//from w  ww . j av a  2 s.  com
    context.putImageData(data, 0, 0);

    return canvas;

}

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From source file:net.npe.image.util.gwt.GwtImageReader.java

License:MIT License

public static Canvas createCanvas(int[] pixels, int width, int height) {

    Canvas canvas = Canvas.createIfSupported();

    if (canvas == null)
        return null;

    canvas.setCoordinateSpaceWidth(width);
    canvas.setCoordinateSpaceHeight(height);

    Context2d context = canvas.getContext2d();
    ImageData data = context.createImageData(width, height);

    CanvasPixelArray array = data.getData();
    for (int i = 0; i < width * height; i++) { // ABGR
        array.set(4 * i + 0, pixels[i] & 0xFF);
        array.set(4 * i + 1, (pixels[i] >> 8) & 0xFF);
        array.set(4 * i + 2, (pixels[i] >> 16) & 0xFF);
        array.set(4 * i + 3, (pixels[i] >> 24) & 0xFF);
    }/* w w w. j a  v  a 2 s.  c om*/
    context.putImageData(data, 0, 0);

    return canvas;

}

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