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

Introduction

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

Prototype

public final native void setGlobalAlpha(double alpha) ;

Source Link

Document

Sets the global alpha value.

Usage

From source file:playn.html.HtmlImmediateLayerCanvas.java

License:Apache License

@Override
void paint(Context2d ctx, float parentAlpha) {
    if (!visible())
        return;//from w  w w . ja va 2 s  . com

    ctx.save();
    transform(ctx);
    ctx.setGlobalAlpha(parentAlpha * alpha);
    render(ctx);
    ctx.restore();
}

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From source file:playn.html.HtmlSurfaceLayerCanvas.java

License:Apache License

@Override
void paint(Context2d ctx, float parentAlpha) {
    if (!visible())
        return;//w  w w  . j  a va 2  s.co m

    ctx.save();
    transform(ctx);

    ctx.setGlobalAlpha(parentAlpha * alpha);
    ctx.drawImage(canvas.canvas(), 0, 0);

    ctx.restore();
}

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