Package org.apache.batik.gvt

Examples of org.apache.batik.gvt.CanvasGraphicsNode

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            prevComponentSize = d;
            if (d.width  < 1) d.width  = 1;
            if (d.height < 1) d.height = 1;
            AffineTransform at = ViewBox.getViewTransform
                (fragmentIdentifier, elt, d.width, d.height);
            CanvasGraphicsNode cgn = getCanvasGraphicsNode(e.getGVTRoot());
            cgn.setViewingTransform(at);
            initialTransform = new AffineTransform();
            setRenderingTransform(initialTransform, false);
            jsvgComponentListener.updateMatrix(initialTransform);
            addJGVTComponentListener(jsvgComponentListener);
            addComponentListener(jsvgComponentListener);
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  // 'requiredFeatures', 'requiredExtensions' and 'systemLanguage'
  if (!SVGUtilities.matchUserAgent(e, ctx.getUserAgent())) {
      return null;
  }

        CanvasGraphicsNode cgn = new CanvasGraphicsNode();

        UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, e);
        String s;

        // In some cases we converted document fragments which didn't
        // have a parent SVG element, this check makes sure only the
        // real root of the SVG Document tries to do negotiation with
        // the UA.
        SVGDocument doc = (SVGDocument)((SVGElement)e).getOwnerDocument();
        boolean isOutermost = (doc.getRootElement() == e);
        float x = 0;
        float y = 0;
        // x and y have no meaning on the outermost 'svg' element
        if (!isOutermost) {
            // 'x' attribute - default is 0
            s = e.getAttributeNS(null, SVG_X_ATTRIBUTE);
            if (s.length() != 0) {
                x = UnitProcessor.svgHorizontalCoordinateToUserSpace
                    (s, SVG_X_ATTRIBUTE, uctx);
            }
            // 'y' attribute - default is 0
            s = e.getAttributeNS(null, SVG_Y_ATTRIBUTE);
            if (s.length() != 0) {
                y = UnitProcessor.svgVerticalCoordinateToUserSpace
                    (s, SVG_Y_ATTRIBUTE, uctx);
            }
        }

        // 'width' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_WIDTH_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_WIDTH_DEFAULT_VALUE;
        }
        float w = UnitProcessor.svgHorizontalLengthToUserSpace
            (s, SVG_WIDTH_ATTRIBUTE, uctx);

        // 'height' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_HEIGHT_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_HEIGHT_DEFAULT_VALUE;
        }
        float h = UnitProcessor.svgVerticalLengthToUserSpace
            (s, SVG_HEIGHT_ATTRIBUTE, uctx);

        // 'visibility'
        cgn.setVisible(CSSUtilities.convertVisibility(e));

        // 'viewBox' and "preserveAspectRatio' attributes
        AffineTransform viewingTransform =
            ViewBox.getPreserveAspectRatioTransform(e, w, h);

        float actualWidth = w;
        float actualHeight = h;
        try {
            AffineTransform vtInv = viewingTransform.createInverse();
            actualWidth = (float) (w*vtInv.getScaleX());
            actualHeight = (float) (h*vtInv.getScaleY());
        } catch (NoninvertibleTransformException ex) {}

        AffineTransform positionTransform =
            AffineTransform.getTranslateInstance(x, y);
        // 'overflow' and 'clip'
        // The outermost preserveAspectRatio matrix is set by the user
        // agent, so we don't need to set the transform for outermost svg
        Shape clip = null;
        if (!isOutermost) {
            cgn.setPositionTransform(positionTransform);
            cgn.setViewingTransform(viewingTransform);
        } else {
            // <!> FIXME: hack to compute the original document's size
            if (ctx.getDocumentSize() == null) {
                ctx.setDocumentSize(new Dimension((int)w, (int)h));
            }
        }

        if (CSSUtilities.convertOverflow(e)) { // overflow:hidden
            float [] offsets = CSSUtilities.convertClip(e);
            if (offsets == null) { // clip:auto
                clip = new Rectangle2D.Float(x, y, w, h);
            } else { // clip:rect(<x> <y> <w> <h>)
                // offsets[0] = top
                // offsets[1] = right
                // offsets[2] = bottom
                // offsets[3] = left
                clip = new Rectangle2D.Float(x+offsets[3],
                                             y+offsets[0],
                                             w-offsets[1]-offsets[3],
                                             h-offsets[2]-offsets[0]);
            }
        }

        if (clip != null) {
            try {
                AffineTransform at = new AffineTransform(positionTransform);
                at.concatenate(viewingTransform);
                at = at.createInverse(); // clip in user space
                clip = at.createTransformedShape(clip);
                Filter filter = cgn.getGraphicsNodeRable(true);
                cgn.setClip(new ClipRable8Bit(filter, clip));
            } catch (NoninvertibleTransformException ex) {}
        }

        // 'enable-background'
        Rectangle2D r = CSSUtilities.convertEnableBackground(e);
        if (r != null) {
            cgn.setBackgroundEnable(r);
        }

        ctx.openViewport
            (e, new SVGSVGElementViewport((SVGSVGElement)e,
                                          actualWidth,
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            prevComponentSize = d;
            if (d.width  < 1) d.width  = 1;
            if (d.height < 1) d.height = 1;
            AffineTransform at = ViewBox.getViewTransform
                (fragmentIdentifier, elt, d.width, d.height);
            CanvasGraphicsNode cgn = getCanvasGraphicsNode();
            AffineTransform vt = cgn.getViewingTransform();
            if (!at.equals(vt)) {
                if (oldD == null)
                    oldD = d;
                // Here we map the old center of the component down to
                // the user coodinate system with the old viewing
                // transform and then back to the screen with the
                // new viewing transform.  We then adjust the rendering
                // transform so it lands in the same place.
                Point2D pt = new Point2D.Float(oldD.width/2.0f,
                                               oldD.height/2.0f);
                AffineTransform rendAT = getRenderingTransform();
                if (rendAT != null) {
                    try {
                        AffineTransform invRendAT = rendAT.createInverse();
                        pt = invRendAT.transform(pt, null);
                    } catch (NoninvertibleTransformException e) { }
                }
                if (vt != null) {
                    try {
                        AffineTransform invVT = vt.createInverse();
                        pt = invVT.transform(pt, null);
                    } catch (NoninvertibleTransformException e) { }
                }
                if (at != null)
                    pt = at.transform(pt, null);
                if (rendAT != null)
                    pt = rendAT.transform(pt, null);

                // Now figure out how far we need to shift things
                // to get the center point to line up again.
                float dx = (float)((d.width/2.0f) -pt.getX());
                float dy = (float)((d.height/2.0f)-pt.getY());
                // Round the values to nearest integer.
                dx = (int)((dx < 0)?(dx - .5):(dx + .5));
                dy = (int)((dy < 0)?(dy - .5):(dy + .5));
                if ((dx != 0) || (dy != 0)) {
                    rendAT.preConcatenate
                        (AffineTransform.getTranslateInstance(dx, dy));
                    setRenderingTransform(rendAT, false);
                }
                cgn.setViewingTransform(at);
                return true;
            }
        } catch (BridgeException e) {
            userAgent.displayError(e);
        }
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            curAOI = aoi;
        } else {
            curAOI = new Rectangle2D.Float(0, 0, width, height);
        }
       
        CanvasGraphicsNode cgn = getCanvasGraphicsNode(gvtRoot);
        if (cgn != null) {
            cgn.setViewingTransform(Px);
            curTxf = new AffineTransform();
        } else {
            curTxf = Px;
        }
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  // 'requiredFeatures', 'requiredExtensions' and 'systemLanguage'
  if (!SVGUtilities.matchUserAgent(e, ctx.getUserAgent())) {
      return null;
  }

        CanvasGraphicsNode gn = new CanvasGraphicsNode();

        UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, e);
        String s;

        boolean isOutermost = (((SVGElement)e).getOwnerSVGElement() == null);
        float x = 0;
        float y = 0;
        // x and y have no meaning on the outermost 'svg' element
        if (!isOutermost) {
            // 'x' attribute - default is 0
            s = e.getAttributeNS(null, SVG_X_ATTRIBUTE);
            if (s.length() != 0) {
                x = UnitProcessor.svgHorizontalCoordinateToUserSpace
                    (s, SVG_X_ATTRIBUTE, uctx);
            }
            // 'y' attribute - default is 0
            s = e.getAttributeNS(null, SVG_Y_ATTRIBUTE);
            if (s.length() != 0) {
                y = UnitProcessor.svgVerticalCoordinateToUserSpace
                    (s, SVG_Y_ATTRIBUTE, uctx);
            }
        }

        // 'width' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_WIDTH_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_WIDTH_DEFAULT_VALUE;
        }
        float w = UnitProcessor.svgHorizontalLengthToUserSpace
            (s, SVG_WIDTH_ATTRIBUTE, uctx);

        // 'height' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_HEIGHT_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_HEIGHT_DEFAULT_VALUE;
        }
        float h = UnitProcessor.svgVerticalLengthToUserSpace
            (s, SVG_HEIGHT_ATTRIBUTE, uctx);

        // 'visibility'
        gn.setVisible(CSSUtilities.convertVisibility(e));

        // 'viewBox' and "preserveAspectRatio' attributes
        AffineTransform at =
            ViewBox.getPreserveAspectRatioTransform(e, w, h);

        float actualWidth = w;
        float actualHeight = h;
        try {
            AffineTransform atInv = at.createInverse();
            actualWidth = (float) (w*atInv.getScaleX());
            actualHeight = (float) (h*atInv.getScaleY());
        } catch (NoninvertibleTransformException ex) {}

        at.preConcatenate(AffineTransform.getTranslateInstance(x, y));

        // 'overflow' and 'clip'
        // The outermost preserveAspectRatio matrix is set by the user
        // agent, so we don't need to set the transform for outermost svg
        Shape clip = null;
        if (!isOutermost) {
            gn.setTransform(at);
        } else {
            // <!> FIXME: hack to compute the original document's size
            if (ctx.getDocumentSize() == null) {
                ctx.setDocumentSize(new Dimension((int)w, (int)h));
            }
        }

        if (CSSUtilities.convertOverflow(e)) { // overflow:hidden
            float [] offsets = CSSUtilities.convertClip(e);
            if (offsets == null) { // clip:auto
                clip = new Rectangle2D.Float(x, y, w, h);
            } else { // clip:rect(<x> <y> <w> <h>)
                // offsets[0] = top
                // offsets[1] = right
                // offsets[2] = bottom
                // offsets[3] = left
                clip = new Rectangle2D.Float(x+offsets[3],
                                             y+offsets[0],
                                             w-offsets[1]-offsets[3],
                                             h-offsets[2]-offsets[0]);
            }
        }

        if (clip != null) {
            try {
                at = at.createInverse(); // clip in user space
                clip = at.createTransformedShape(clip);
                Filter filter = gn.getGraphicsNodeRable(true);
                gn.setClip(new ClipRable8Bit(filter, clip));
            } catch (NoninvertibleTransformException ex) {}
        }

        // 'enable-background'
        Rectangle2D r = CSSUtilities.convertEnableBackground(e);
        if (r != null) {
            gn.setBackgroundEnable(r);
        }

        ctx.openViewport
            (e, new SVGSVGElementViewport((SVGSVGElement)e,
                                          actualWidth,
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  // 'requiredFeatures', 'requiredExtensions' and 'systemLanguage'
  if (!SVGUtilities.matchUserAgent(e, ctx.getUserAgent())) {
      return null;
  }

        CanvasGraphicsNode gn = new CanvasGraphicsNode();

        UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, e);
        String s;

        boolean isOutermost = (((SVGElement)e).getOwnerSVGElement() == null);
        float x = 0;
        float y = 0;
        // x and y have no meaning on the outermost 'svg' element
        if (!isOutermost) {
            // 'x' attribute - default is 0
            s = e.getAttributeNS(null, SVG_X_ATTRIBUTE);
            if (s.length() != 0) {
                x = UnitProcessor.svgHorizontalCoordinateToUserSpace
                    (s, SVG_X_ATTRIBUTE, uctx);
            }
            // 'y' attribute - default is 0
            s = e.getAttributeNS(null, SVG_Y_ATTRIBUTE);
            if (s.length() != 0) {
                y = UnitProcessor.svgVerticalCoordinateToUserSpace
                    (s, SVG_Y_ATTRIBUTE, uctx);
            }
        }

        // 'width' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_WIDTH_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_WIDTH_DEFAULT_VALUE;
        }
        float w = UnitProcessor.svgHorizontalLengthToUserSpace
            (s, SVG_WIDTH_ATTRIBUTE, uctx);

        // 'height' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_HEIGHT_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_HEIGHT_DEFAULT_VALUE;
        }
        float h = UnitProcessor.svgVerticalLengthToUserSpace
            (s, SVG_HEIGHT_ATTRIBUTE, uctx);

        // 'visibility'
        gn.setVisible(CSSUtilities.convertVisibility(e));

        // 'viewBox' and "preserveAspectRatio' attributes
        AffineTransform at =
            ViewBox.getPreserveAspectRatioTransform(e, w, h);

        float actualWidth = w;
        float actualHeight = h;
        try {
            AffineTransform atInv = at.createInverse();
            actualWidth = (float) (w*atInv.getScaleX());
            actualHeight = (float) (h*atInv.getScaleY());
        } catch (NoninvertibleTransformException ex) {}

        at.preConcatenate(AffineTransform.getTranslateInstance(x, y));

        // 'overflow' and 'clip'
        // The outermost preserveAspectRatio matrix is set by the user
        // agent, so we don't need to set the transform for outermost svg
        Shape clip = null;
        if (!isOutermost) {
            gn.setTransform(at);
        } else {
            // <!> FIXME: hack to compute the original document's size
            if (ctx.getDocumentSize() == null) {
                ctx.setDocumentSize(new Dimension((int)w, (int)h));
            }
        }

        if (CSSUtilities.convertOverflow(e)) { // overflow:hidden
            float [] offsets = CSSUtilities.convertClip(e);
            if (offsets == null) { // clip:auto
                clip = new Rectangle2D.Float(x, y, w, h);
            } else { // clip:rect(<x> <y> <w> <h>)
                // offsets[0] = top
                // offsets[1] = right
                // offsets[2] = bottom
                // offsets[3] = left
                clip = new Rectangle2D.Float(x+offsets[3],
                                             y+offsets[0],
                                             w-offsets[1]-offsets[3],
                                             h-offsets[2]-offsets[0]);
            }
        }

        if (clip != null) {
            try {
                at = at.createInverse(); // clip in user space
                clip = at.createTransformedShape(clip);
                Filter filter = gn.getGraphicsNodeRable(true);
                gn.setClip(new ClipRable8Bit(filter, clip));
            } catch (NoninvertibleTransformException ex) {}
        }

        // 'enable-background'
        Rectangle2D r = CSSUtilities.convertEnableBackground(e, uctx);
        if (r != null) {
            gn.setBackgroundEnable(r);
        }

        ctx.openViewport
            (e, new SVGSVGElementViewport((SVGSVGElement)e,
                                          actualWidth,
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  // 'requiredFeatures', 'requiredExtensions' and 'systemLanguage'
  if (!SVGUtilities.matchUserAgent(e, ctx.getUserAgent())) {
      return null;
  }

        CanvasGraphicsNode gn = new CanvasGraphicsNode();

        UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, e);
        String s;

        boolean isOutermost = (((SVGElement)e).getOwnerSVGElement() == null);
        float x = 0;
        float y = 0;
        // x and y have no meaning on the outermost 'svg' element
        if (!isOutermost) {
            // 'x' attribute - default is 0
            s = e.getAttributeNS(null, SVG_X_ATTRIBUTE);
            if (s.length() != 0) {
                x = UnitProcessor.svgHorizontalCoordinateToUserSpace
                    (s, SVG_X_ATTRIBUTE, uctx);
            }
            // 'y' attribute - default is 0
            s = e.getAttributeNS(null, SVG_Y_ATTRIBUTE);
            if (s.length() != 0) {
                y = UnitProcessor.svgVerticalCoordinateToUserSpace
                    (s, SVG_Y_ATTRIBUTE, uctx);
            }
        }

        // 'width' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_WIDTH_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_WIDTH_DEFAULT_VALUE;
        }
        float w = UnitProcessor.svgHorizontalLengthToUserSpace
            (s, SVG_WIDTH_ATTRIBUTE, uctx);

        // 'height' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_HEIGHT_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_HEIGHT_DEFAULT_VALUE;
        }
        float h = UnitProcessor.svgVerticalLengthToUserSpace
            (s, SVG_HEIGHT_ATTRIBUTE, uctx);

        // 'visibility'
        gn.setVisible(CSSUtilities.convertVisibility(e));

        // 'viewBox' and "preserveAspectRatio' attributes
        AffineTransform at =
            ViewBox.getPreserveAspectRatioTransform(e, w, h);

        float actualWidth = w;
        float actualHeight = h;
        try {
            AffineTransform atInv = at.createInverse();
            actualWidth = (float) (w*atInv.getScaleX());
            actualHeight = (float) (h*atInv.getScaleY());
        } catch (NoninvertibleTransformException ex) {}

        at.preConcatenate(AffineTransform.getTranslateInstance(x, y));

        // 'overflow' and 'clip'
        // The outermost preserveAspectRatio matrix is set by the user
        // agent, so we don't need to set the transform for outermost svg
        Shape clip = null;
        if (!isOutermost) {
            gn.setTransform(at);
        } else {
            // <!> FIXME: hack to compute the original document's size
            if (ctx.getDocumentSize() == null) {
                ctx.setDocumentSize(new Dimension((int)w, (int)h));
            }
        }

        if (CSSUtilities.convertOverflow(e)) { // overflow:hidden
            float [] offsets = CSSUtilities.convertClip(e);
            if (offsets == null) { // clip:auto
                clip = new Rectangle2D.Float(x, y, w, h);
            } else { // clip:rect(<x> <y> <w> <h>)
                // offsets[0] = top
                // offsets[1] = right
                // offsets[2] = bottom
                // offsets[3] = left
                clip = new Rectangle2D.Float(x+offsets[3],
                                             y+offsets[0],
                                             w-offsets[1]-offsets[3],
                                             h-offsets[2]-offsets[0]);
            }
        }

        if (clip != null) {
            try {
                at = at.createInverse(); // clip in user space
                clip = at.createTransformedShape(clip);
                Filter filter = gn.getGraphicsNodeRable(true);
                gn.setClip(new ClipRable8Bit(filter, clip));
            } catch (NoninvertibleTransformException ex) {}
        }

        // 'enable-background'
        Rectangle2D r = CSSUtilities.convertEnableBackground(e);
        if (r != null) {
            gn.setBackgroundEnable(r);
        }

        ctx.openViewport
            (e, new SVGSVGElementViewport((SVGSVGElement)e,
                                          actualWidth,
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  // 'requiredFeatures', 'requiredExtensions' and 'systemLanguage'
  if (!SVGUtilities.matchUserAgent(e, ctx.getUserAgent())) {
      return null;
  }

        CanvasGraphicsNode gn = new CanvasGraphicsNode();

        UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, e);
        String s;

        boolean isOutermost = (((SVGElement)e).getOwnerSVGElement() == null);
        float x = 0;
        float y = 0;
        // x and y have no meaning on the outermost 'svg' element
        if (!isOutermost) {
            // 'x' attribute - default is 0
            s = e.getAttributeNS(null, SVG_X_ATTRIBUTE);
            if (s.length() != 0) {
                x = UnitProcessor.svgHorizontalCoordinateToUserSpace
                    (s, SVG_X_ATTRIBUTE, uctx);
            }
            // 'y' attribute - default is 0
            s = e.getAttributeNS(null, SVG_Y_ATTRIBUTE);
            if (s.length() != 0) {
                y = UnitProcessor.svgVerticalCoordinateToUserSpace
                    (s, SVG_Y_ATTRIBUTE, uctx);
            }
        }

        // 'width' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_WIDTH_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_WIDTH_DEFAULT_VALUE;
        }
        float w = UnitProcessor.svgHorizontalLengthToUserSpace
            (s, SVG_WIDTH_ATTRIBUTE, uctx);

        // 'height' attribute - default is 100%
        s = e.getAttributeNS(null, SVG_HEIGHT_ATTRIBUTE);
        if (s.length() == 0) {
            s = SVG_SVG_HEIGHT_DEFAULT_VALUE;
        }
        float h = UnitProcessor.svgVerticalLengthToUserSpace
            (s, SVG_HEIGHT_ATTRIBUTE, uctx);

        // 'visibility'
        gn.setVisible(CSSUtilities.convertVisibility(e));

        // 'viewBox' and "preserveAspectRatio' attributes
        AffineTransform at =
            ViewBox.getPreserveAspectRatioTransform(e, w, h);

        float actualWidth = w;
        float actualHeight = h;
        try {
            AffineTransform atInv = at.createInverse();
            actualWidth = (float) (w*atInv.getScaleX());
            actualHeight = (float) (h*atInv.getScaleY());
        } catch (NoninvertibleTransformException ex) {}

        at.preConcatenate(AffineTransform.getTranslateInstance(x, y));

        // 'overflow' and 'clip'
        // The outermost preserveAspectRatio matrix is set by the user
        // agent, so we don't need to set the transform for outermost svg
        Shape clip = null;
        if (!isOutermost) {
            gn.setTransform(at);
        } else {
            // <!> FIXME: hack to compute the original document's size
            if (ctx.getDocumentSize() == null) {
                ctx.setDocumentSize(new Dimension((int)w, (int)h));
            }
        }

        if (CSSUtilities.convertOverflow(e)) { // overflow:hidden
            float [] offsets = CSSUtilities.convertClip(e);
            if (offsets == null) { // clip:auto
                clip = new Rectangle2D.Float(x, y, w, h);
            } else { // clip:rect(<x> <y> <w> <h>)
                // offsets[0] = top
                // offsets[1] = right
                // offsets[2] = bottom
                // offsets[3] = left
                clip = new Rectangle2D.Float(x+offsets[3],
                                             y+offsets[0],
                                             w-offsets[1]-offsets[3],
                                             h-offsets[2]-offsets[0]);
            }
        }

        if (clip != null) {
            try {
                at = at.createInverse(); // clip in user space
                clip = at.createTransformedShape(clip);
                Filter filter = gn.getGraphicsNodeRable(true);
                gn.setClip(new ClipRable8Bit(filter, clip));
            } catch (NoninvertibleTransformException ex) {}
        }

        // 'enable-background'
        Rectangle2D r = CSSUtilities.convertEnableBackground(e);
        if (r != null) {
            gn.setBackgroundEnable(r);
        }

        ctx.openViewport
            (e, new SVGSVGElementViewport((SVGSVGElement)e,
                                          actualWidth,
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            }

            curAOI = new Rectangle2D.Float(0, 0, width, height);
        }

        CanvasGraphicsNode cgn = getCanvasGraphicsNode(gvtRoot);
        if (cgn != null) {
            cgn.setViewingTransform(Px);
            curTxf = new AffineTransform();
        } else {
            curTxf = Px;
        }
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                double s = Math.min(sx, sy);
                Tx = AffineTransform.getScaleInstance(s, s);
            }

            GraphicsNode gn = svgCanvas.getGraphicsNode();
            CanvasGraphicsNode cgn = getCanvasGraphicsNode(gn);
            if (cgn != null) {
                AffineTransform vTx = cgn.getViewingTransform();
                if ((vTx != null) && !vTx.isIdentity()) {
                    try {
                        AffineTransform invVTx = vTx.createInverse();
                        Tx.concatenate(invVTx);
                    } catch (NoninvertibleTransformException nite) {
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