I have written code to retrieve Image of a single node from entire image..the
code works fine.
The problem is it is too slow
possibly due to following statement
builder.build(bridgeContext, thisDocument);
I am calling the getKeyBufferedImage() function several times and it becomes
very very slow.
My question is : Is there any need to call builder.build(bridgeContext,
thisDocument); each time?
I am not able to get the result each time if I call the abve statement only
once(initially).
Also I have to initialize and reset the objects all the time.
Can anybody review the code and help me find the solution?
Also explain me..why I need to call builder.build each time?
<code>
protected void initObjects()
{
userAgentAdapter = new UserAgentAdapter();
bridgeContext = new BridgeContext(userAgentAdapter);
builder = new GVTBuilder();
}
/**
* Reset the objects. (What were you expecting?)
*/
protected void resetObjects()
{
userAgentAdapter = null;
bridgeContext = null;
builder = null;
}
public Image getKeyBufferedImage(final String keyString)
{
resetObjects();
initObjects();
GraphicsNode graphicsNode = null;
builder.build(bridgeContext, thisDocument);
try
{
graphicsNode = builder.build(bridgeContext,
thisDocument.getElementById(keyString));
}
catch (final Exception e)
{
logSVG.warning("Error creating graphics node. Key might be
absent. Key = " + keyString);
e.printStackTrace();
return null;
}
// Size up the rectangle in 2D space.
final Rectangle2D bounds = graphicsNode.getBounds();
final int margin = 3;
// Convert the 2D space into a rectangular region within the
document.
final Rectangle areaOfInterest = new Rectangle((int) bounds.getX() -
1,
(int) bounds.getY() - 1, (int) bounds.getWidth() + margin,
(int) bounds.getHeight() + margin);
//Assume that SVG is max of 1000 X 1000
final int size1000 = 1000;
Image imag = new BufferedImage(size1000, size1000,
BufferedImage.TYPE_4BYTE_ABGR);
try
{
//Get Image graphics
final Graphics2D g = (Graphics2D) imag.getGraphics();
//g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f));
//Because the SVG is rendered AntiAliased
//Set same for current graphics object
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, //
Anti-alias!
RenderingHints.VALUE_ANTIALIAS_ON);
//Pass the graphics object to node's paint method
graphicsNode.paint((Graphics2D) g);
}
catch (final Exception e1)
{
e1.printStackTrace();
}
//Crop the key Image..as it is painted at the actual location
imag = createImage(new FilteredImageSource(imag.getSource(),
new CropImageFilter(
areaOfInterest.x , areaOfInterest.y ,
areaOfInterest.width , areaOfInterest.height)));
//return the resulting Image
return imag;
}
</code>
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