Examples of java.awt.image.renderable.RenderContext

java.awt.image.renderable.RenderContext
A RenderContext encapsulates the information needed to produce a specific rendering from a RenderableImage. It contains the area to be rendered specified in rendering-independent terms, the resolution at which the rendering is to be performed, and hints used to control the rendering process.
Users create RenderContexts and pass them to the RenderableImage via the createRendering method. Most of the methods of RenderContexts are not meant to be used directly by applications, but by the RenderableImage and operator classes to which it is passed.
The AffineTransform parameter passed into and out of this class are cloned. The RenderingHints and Shape parameters are not necessarily cloneable and are therefore only reference copied. Altering RenderingHints or Shape instances that are in use by instances of RenderContext may have undesired side effects.


        // Get our sources image...
        // System.out.println("UnOpt: " + filter);
        AffineTransform at = g2d.getTransform();
        RenderedImage ri = filter.createRendering
            (new RenderContext(at, g2d.getClip(), g2d.getRenderingHints()));


        if (ri == null)
            return;


        g2d.setTransform(IDENTITY);

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        float sX = w/getWidth();
        float sY = h/getHeight();
        float scale = Math.min(sX, sY);


        AffineTransform at = AffineTransform.getScaleInstance(scale, scale);
        RenderContext rc = new RenderContext(at, hints);


        float dX = (getWidth()*scale)-w;
        float dY = (getHeight()*scale)-h;


        RenderedImage ri = createRendering(rc);

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        // We only want it's alpha channel...
        rh.put(FilterAsAlphaRable.KEY_COLORSPACE, 
               FilterAsAlphaRable.VALUE_COLORSPACE_ALPHA);


        RenderedImage ri;
        ri = getSource().createRendering(new RenderContext(at, aoi, rh));
        
        if(ri == null){
            return null;
        }

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        // update the current affine transform
        AffineTransform at = rc.getTransform();
        at.concatenate(affine);


        // Return what our input creates (it should factor in our affine).
        return getSource().createRendering(new RenderContext(at, aoi, rh));
    }

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        AffineTransform resAt = new AffineTransform(sx/scaleX, shy/scaleX,
                                                    shx/scaleY, sy/scaleY,
                                                    tx, ty);


        RenderedImage ri;
        ri = getSource().createRendering(new RenderContext(srcAt, r, rh));
        if (ri == null)
            return null;


        // org.apache.batik.test.gvt.ImageDisplay.printImage
        //     ("Padded Image", ri,

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        g2d.setPaint(Color.white);
        g2d.fill(devShape);
        g2d.dispose();


        RenderedImage ri;
        ri = getSource().createRendering(new RenderContext(usr2dev, rect, rh));


        CachableRed cr, clipCr;
        cr = RenderedImageCachableRed.wrap(ri);
        clipCr = new BufferedImageCachableRed(bi, devR.x, devR.y);
        CachableRed ret = new MultiplyAlphaRed(cr, clipCr);

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        float yscale = 100f/src.getHeight();


        if (scale > yscale) scale=yscale;
        
        AffineTransform at = AffineTransform.getScaleInstance(scale, scale);
        rc = new RenderContext(at, rc.getRenderingHints());
        RenderedImage histRI = getSource().createRendering(rc);


        histo = new HistogramRed(convertSourceCS(histRI)).getHistogram();


        int t = (int)(histRI.getWidth()*histRI.getHeight()*trim+0.5);

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            Rectangle2D.intersect(aoiR, bounds2d, aoiR);
        }


        Rectangle devRect = at.createTransformedShape(aoiR).getBounds();


        rc = new RenderContext(at, aoiR, rh);


        Vector srcs = new Vector();


        Iterator i = getSources().iterator();
        while (i.hasNext()) {

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        if (destCS == ColorSpace.getInstance(ColorSpace.CS_sRGB))
            tileRable.setColorSpaceLinear(false);
        else if (destCS == ColorSpace.getInstance(ColorSpace.CS_LINEAR_RGB))
            tileRable.setColorSpaceLinear(true);


        RenderContext rc = new RenderContext(usr2dev,  EVERYTHING, hints);
        tiled = tileRable.createRendering(rc);
        // System.out.println("tileRed: " + tiled);
        // org.apache.batik.test.gvt.ImageDisplay.showImage("Tiled: ", tiled);


        //System.out.println("Created rendering");

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        resUsr2Dev = AffineTransform.getScaleInstance(resScale, resScale);
        
        //
        // Create a new RenderingContext
        //
        RenderContext newRC = new RenderContext(resUsr2Dev, null, hints);


        ret = getSource().createRendering(newRC);


        // This is probably justified since the whole reason to use
        // The filterRes attribute is because the filter chain is

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