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

Introduction

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

Prototype

public final native void scale(double x, double y) ;

Source Link

Document

Applies scale to the current transform.

Usage

From source file:org.geomajas.gwt2.example.client.sample.rendering.CanvasImageElement.java

License:Open Source License

@Override
public void paint(Canvas canvas, Matrix matrix) {
    /*/* w  ww.j  a  v  a2 s  .  c o m*/
    * paint image on canvas based on the original and with the transformations of the matrix.
    * */
    Context2d context2d = canvas.getContext2d();
    context2d.save();
    boolean xReversal = matrix.getXx() < 0;
    boolean yReversal = matrix.getYy() < 0;
    context2d.scale(xReversal ? -1 : 1, yReversal ? -1 : 1);
    double xValue = xReversal ? box.getMaxX() * -1 : box.getX();
    double yValue = yReversal ? box.getMaxY() * -1 : box.getY();
    context2d.drawImage(hiddenImageCanvas.getCanvasElement(), xValue, yValue, box.getWidth(), box.getHeight());
    context2d.restore();
}

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From source file:org.teavm.samples.benchmark.gwt.BenchmarkStarter.java

License:Apache License

private void render() {
    Context2d context = canvas.getContext2d();
    context.setFillStyle("white");
    context.setStrokeStyle("grey");
    context.fillRect(0, 0, 600, 600);//from  w  w  w  .  j a va 2s . c  o m
    context.save();
    context.translate(0, 600);
    context.scale(1, -1);
    context.scale(100, 100);
    context.setLineWidth(0.01);
    for (Body body = scene.getWorld().getBodyList(); body != null; body = body.getNext()) {
        Vec2 center = body.getPosition();
        context.save();
        context.translate(center.x, center.y);
        context.rotate(body.getAngle());
        for (Fixture fixture = body.getFixtureList(); fixture != null; fixture = fixture.getNext()) {
            Shape shape = fixture.getShape();
            if (shape.getType() == ShapeType.CIRCLE) {
                CircleShape circle = (CircleShape) shape;
                context.beginPath();
                context.arc(circle.m_p.x, circle.m_p.y, circle.getRadius(), 0, Math.PI * 2, true);
                context.closePath();
                context.stroke();
            } else if (shape.getType() == ShapeType.POLYGON) {
                PolygonShape poly = (PolygonShape) shape;
                Vec2[] vertices = poly.getVertices();
                context.beginPath();
                context.moveTo(vertices[0].x, vertices[0].y);
                for (int i = 1; i < poly.getVertexCount(); ++i) {
                    context.lineTo(vertices[i].x, vertices[i].y);
                }
                context.closePath();
                context.stroke();
            }
        }
        context.restore();
    }
    context.restore();
}

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From source file:playn.html.HtmlImageLayerCanvas.java

License:Apache License

@Override
public void paint(Context2d ctx, float parentAlpha) {
    if (!visible() || !img.isReady())
        return;/*from  w w  w .  j  a va 2 s.c  om*/

    ctx.save();
    transform(ctx);
    ctx.setGlobalAlpha(parentAlpha * alpha);

    float width = width();
    float height = height();
    if (repeatX || repeatY) {
        updatePattern(ctx);
        ctx.setFillStyle(pattern);
        ctx.beginPath();
        ctx.rect(0, 0, width, height);
        ctx.scale(repeatX ? 1 : width / img.width(), repeatY ? 1 : height / img.height());
        ctx.fill();
    } else {
        ((HtmlCanvas.Drawable) img).draw(ctx, 0, 0, width, height);
    }

    ctx.restore();
}

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