This answer applies to both "Richie Bab A. Boyboy" and " Vill�n
Pizarro":
The answer you are looking for lies most probably in using a Servlet
combined with the Java Advanced Imaging (JAI), available from
java.sun.com.
There are codecs to produce JPEGs and other formats, however if you are
looking to output GIF, the freeware code by ACME is recommended.
In terms of adding shapes to images, this can be easily done, the
procedure would be as follows.
// Get existing image
URL theURL = new URL("http://path.to/your/image.gif";);
RenderedImage image = JAI.create("url",theURL);
PlanarImage planImage = (PlanarImage)image;
BufferedImage buffImage =
planImage.getAsBufferedImage();
// Create a new graphics object
Graphics graphics = buffImage.getGraphics();
graphics.drawImage(buffImage, 0, 0, null);
// Draw a rectangle on the image
graphics.drawRect(0, 0, 10, 10);
// Send to browser
out = response.getOutputStream();
response.setContentType("image/gif");
GifEncoder encoder; // Use the ACME GifEncoder
encoder = new GifEncoder(buffImage, out);
encoder.encode();
out.flush();
Hope this helps,
Regards,
Peter Dolukhanov
-----Original Message-----
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]] On Behalf Of Vill�n Pizarro
Sent: 30 April 2002 13:33
To: [EMAIL PROTECTED]
Subject: Any idea of how to draw a line or a square on top of an image?
Hello everyone:
I have an image in a page, and I need to paint a square (or 4 lines )on
top of it depending of certain parameters, to represent a selected area.
Any idea of how can I do this? Or how can jsp help to do this?
Thanks a lot,
Julia
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![http://path.to/your/image.gif"](http://path.to/your/image.gif"){kind=link}