Examples with CanvasGraphicsNode org.apache.batik.gvt.CanvasGraphicsNode used on opensource projects

Example 1 with CanvasGraphicsNode

use of org.apache.batik.gvt.CanvasGraphicsNode in project yamcs-studio by yamcs.

the class SVGHandler method getCanvasGraphicsNode.

protected CanvasGraphicsNode getCanvasGraphicsNode(GraphicsNode gn) {
    if (!(gn instanceof CompositeGraphicsNode)) {
        return null;
    }
    CompositeGraphicsNode cgn = (CompositeGraphicsNode) gn;
    List<?> children = cgn.getChildren();
    if (children.size() == 0) {
        return null;
    }
    gn = (GraphicsNode) children.get(0);
    if (!(gn instanceof CanvasGraphicsNode)) {
        return null;
    }
    return (CanvasGraphicsNode) gn;
}

Example 2 with CanvasGraphicsNode

use of org.apache.batik.gvt.CanvasGraphicsNode in project yamcs-studio by yamcs.

the class SVGHandler method doRender.

protected void doRender() {
    if (disposed) {
        return;
    }
    updateMatrix();
    changeColor(colorToChange, colorToApply);
    gvtRoot = builder.build(bridgeContext, svgDocument);
    // get the 'width' and 'height' attributes of the SVG document
    float width = 400, height = 400;
    float docWidth = (float) bridgeContext.getDocumentSize().getWidth();
    float docHeight = (float) bridgeContext.getDocumentSize().getHeight();
    if (canvasWidth > 0 && canvasHeight > 0) {
        width = canvasWidth;
        height = canvasHeight;
    } else if (canvasHeight > 0) {
        width = (docWidth * canvasHeight) / docHeight;
        height = canvasHeight;
    } else if (canvasWidth > 0) {
        width = canvasWidth;
        height = (docHeight * canvasWidth) / docWidth;
    } else {
        width = docWidth;
        height = docHeight;
    }
    // compute the preserveAspectRatio matrix
    AffineTransform renderingTransform = null;
    AffineTransform Px = null;
    SVGSVGElement root = svgDocument.getRootElement();
    String viewBox = root.getAttributeNS(null, SVGConstants.SVG_VIEW_BOX_ATTRIBUTE);
    if (viewBox != null && viewBox.length() != 0) {
        String aspectRatio = root.getAttributeNS(null, SVGConstants.SVG_PRESERVE_ASPECT_RATIO_ATTRIBUTE);
        Px = ViewBox.getPreserveAspectRatioTransform(root, viewBox, aspectRatio, width, height, bridgeContext);
    } else {
        // no viewBox has been specified, create a scale transform
        float xscale = width / docWidth;
        float yscale = height / docHeight;
        float scale = Math.min(xscale, yscale);
        Px = AffineTransform.getScaleInstance(scale, scale);
    }
    Shape curAOI = new Rectangle2D.Float(0, 0, width, height);
    CanvasGraphicsNode cgn = getCanvasGraphicsNode(gvtRoot);
    if (cgn != null) {
        cgn.setViewingTransform(Px);
        renderingTransform = new AffineTransform();
    } else {
        renderingTransform = Px;
    }
    if (renderer != null) {
        renderer.dispose();
        renderer = null;
    }
    renderer = createImageRenderer();
    int w = (int) (curAOI.getBounds().width + 0.5);
    int h = (int) (curAOI.getBounds().height + 0.5);
    renderer.updateOffScreen(w, h);
    renderer.setTree(gvtRoot);
    renderer.setTransform(renderingTransform);
    renderer.setDoubleBuffered(false);
    renderer.clearOffScreen();
    renderer.repaint(curAOI);
    if (updateManager != null) {
        updateManager.setGVTRoot(gvtRoot);
    }
    needRender = false;
}