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Java Forum / General / March 2007how to save an edited image ( painted on an applet) as .jpg or .gif
Hi group , I used drawImage() function to draw an image on an applet , you can paint on this image in the applet. Now I want to save this edited image as a .jpg or .gif file. I would like some one to help me put in this. The whole thing should look almost like the online image editor which is shown in the following link. http://www.izhuk.com/painter/medicine/ Thanks and Regards Venkat > Hi group , > I used drawImage() function to draw an image on an applet , [quoted text clipped - 9 lines] > Thanks and Regards > Venkat *Holds up a sign declaring "javax.imageio"* .. > I used drawImage() function to draw an image on an applet , > you can paint on this image in the applet. Now I want to save this > edited image as a .jpg or .gif file. I would like some one to help me > put in this. It would help if you asked a specific question. Note that to save to the local file system, an applet will either need to be signed and trusted, or launched using web start, for use of the JNLP API file access abilities. Andrew T. I am sorry, I was not specific about my problem . I wanted to simulate the online image editor which looks and functions exactly similar to the image editor that is shown in the link below by using java applets. http://www.izhuk.com/painter/medicine/ I was able to put the image on an applet and was able to draw on it. Now I want to save this edited image into a .jpg or .gif file, which could be sent to the server and be saved in a sql table. I would be thankful if any one could help me in this matter . Regards Venkat ... > I wanted to simulate the online image editor which looks and functions > exactly similar to the image editor that is shown in the link below > by using java applets. 'Exactly similar' is a confusing term. It is almost that same words as 'exactly the same' but has quite different meaning. 'Exactly the same' means 'exactly the same' - no differences whatsoever, whereas 'exactly similar' is a clash of words, since similar means 'almost, but *not* exactly, the same'. The reason I point this out is because.. > http://www.izhuk.com/painter/medicine/ > > I was able to put the image on an applet and was able to draw on it. > Now I want to save this edited image into a .jpg or .gif file, which > could be sent to the server and be saved in a sql table. There is no evidence on hand that suggests the deployers of that applet store the images in 'a sql table'. Further, storing an image back to the server (without offering the image for download) can be simpler than saving it to the user's disk, and it can all be done within the one web page, and would not require any 'trust' on the part of the client. So, to be specific about the user side of it. Are you *also* intending to offer the image for the end user to save? Or is it only for storage in the server? (I took the liberty of changing the subject line, to more closely reflect the task as I currently understand it.) Andrew T. > ... > [quoted text clipped - 37 lines] > > Andrew T. No , my task is to save the edited image on to server... and there is no need(in particular) to save the image on the client. I want to save the image into a sql table at the server end so that it could be pulled up as when required. Thank you Mr . Andrew for your quick responses. >> ... >> [quoted text clipped - 41 lines] > > Thank you Mr . Andrew for your quick responses. If you take a look at the javax.imageio API's, the information to write and save images is included in there. In Java 1.4, RW capabilities are provided for JPEG, PNG, and R for GIF, 1.5 added RW capabilities for BMP and WBMP, while 6 provided W capabilities for GIF (due to LZW patent complications). Poke around javax.imageio.ImageIO especially for more details -- you can print to an arbitrary OutputStream given a format name and a RenderedImage (e.g. BufferedImage). > .. > >..applet ,.. > > ..Now I want to save this > > edited image as a .jpg or .gif file. ... > Note that to save to the local file system, an > applet will either need to be signed and trusted, > or launched using web start, for use of the JNLP > API file access abilities. Now that I have tried that image editor, I realise they have done something quite tricky (but very inefficient), in order to avoid having to ask the user to accept signed code. To deliver the final image to the user, the applet transmits the altered image back to the server, the server prepares a standard Gif (PNG, whatever..) and delivers that back to the client as a standard image with the message 'right click to save..' (I wonder how that works for mice with only one button?). In any case, to do it 'just like they have' requires an active server (to process and redirect the images back to the client). I recommend web start as an alternative, since that will allow the images to be saved directly by the client, without having to go for a round trip to the server and back (though in the 'unsigned' form that I recommend deploying, Java will prompt the user if they want to allow file access on image save). Here is an example of the JNLP file API usage in an unsigned application. <http://www.physci.org/jws/#fs> HTH Andrew T. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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