Example usage for com.google.gwt.dom.client CanvasElement toDataUrl

Introduction

In this page you can find the example usage for com.google.gwt.dom.client CanvasElement toDataUrl.

Prototype

public final native String toDataUrl(String type) ;

Source Link

Document

Returns a data URL for the current content of the canvas element, with a specified type.

Usage

From source file:gwt.material.design.addins.client.camera.MaterialCameraCapture.java

License:Apache License

/**
 * Native call to capture the frame of the video stream.
 *//*from  w w w.  ja v  a2s.  c  o m*/
protected String nativeCaptureToDataURL(CanvasElement canvas, Element element, String mimeType) {
    VideoElement videoElement = (VideoElement) element;
    int width = videoElement.getVideoWidth();
    int height = videoElement.getVideoHeight();
    if (Double.isNaN(width) || Double.isNaN(height)) {
        width = videoElement.getClientWidth();
        height = videoElement.getClientHeight();
    }
    canvas.setWidth(width);
    canvas.setHeight(height);
    Context2d context = canvas.getContext2d();
    context.drawImage(videoElement, 0, 0, width, height);
    return canvas.toDataUrl(mimeType);
}

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