cheers
GVS
-----Original Message-----
From: Thomas DeWeese [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 23, 2003 1:30 PM
To: Batik Users
Subject: Re: outofmemory error in batik transcoder
GVS Srinivas wrote:
hi,
i am sorry if i conveyed that tiffencoding is not solving my
problem.infact
as mentioned in my earlier mail,i didnt quite get through how to encode
the
tiff image on the fly.i was not quite sure what to pass the argument for
encoder.encode().
please guide me.
here is the code.i am doing this in a servlet filter
=======================================================================
response.setContentType("image/tiff");
String svgJpeg="svgTansformedImage";
String headerString="attachment"+" filename=\""+ svgJpeg +".tiff\"";
response.setHeader("Content-Disposition", "inline filename=\""+
svgJpeg +".tiff\"");
TiledImageTranscoder t = new TiledImageTranscoder();
You need to modify the transcode method of the TiledImageTranscoder.
The Current code looks like:
RenderedImage rimg = new FormatRed(GraphicsUtil.wrap(img), sm);
TIFFImageEncoder enc = new TIFFImageEncoder
(output.getOutputStream(), null);
enc.encode(rimg);
The new code will look something like:
RenderedImage rimg = new FormatRed(GraphicsUtil.wrap(img), sm);
TIFFEncodeParam param = new TIFFEncodeParam();
param.setCompression(TIFFEncodeParam.COMPRESSION_JPEG_TTN2);
// Perhaps set other param's (tiled, JPEG Params).
TIFFImageEncoder enc = new TIFFImageEncoder
(output.getOutputStream(), param);
enc.encode(rimg);
t.addTranscodingHint(KEY_WIDTH, new Float(10240));
TranscoderInput input =
new TranscoderInput( new StringReader(outputSVGString) );//the
outputSVGString is the svg string
// which i want to convert as an image
try {
TranscoderOutput output =
new TranscoderOutput(response.getOutputStream());
t.transcode(input, output);
TIFFEncodeParam param = new TIFFEncodeParam();
param.setCompression(TIFFEncodeParam.COMPRESSION_JPEG_TTN2);
ImageEncoder encoder = ImageCodec.createImageEncoder("TIFF",
response.getOutputStream(),param);
encoder.encode(?????);//what should i pass the input as should
//i read it from the disk after i save
the image
response.getOutputStream().flush();
response.getOutputStream().close();
}
catch (Throwable e)
{
e.printStackTrace();
}
=======================================================================
-----Original Message-----
From: Thomas DeWeese [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 23, 2003 12:34 PM
To: Batik Users
Subject: Re: outofmemory error in batik transcoder
GVS Srinivas wrote:
thanks for the suggestion of tiffencoding.i still didnt get through doing
that.
I am _very_ surprised that this didn't solve the problem if the default
TiledImageTranscoder did work.
one more suggestion..
there are some JPEGTranscoding hints like Key_Quality,
KEY_PIXEL_TO_MM.does
the memory blowing up decrease by adjusting these values,please suggest.
thanks a lot
There are lots of options you can set in the TIFFEncodeParam. One of
them is the JPEG encoding params to use (this allows you to specify
the quality setting), this won't significantly affect the amount of memory
used to encode the image, but will obviously effect the size of the file
on disk. One option you might try using is to turn on 'tiled' output
in the TIFF Encoder.
Once again though I must say that I am very surprised that turning on
JPEG Encoding caused it to fail. Can you post the code you are using to
encode the image?
GVS
-----Original Message-----
From: GVS Srinivas
Sent: Wednesday, October 22, 2003 3:55 PM
To: 'Batik Users'
Subject: RE: outofmemory error in batik transcoder
i saw this snippet of code
================================================
OutputStream out = new FileOutputStream(fileName);
TIFFEncodeParam param = new TIFFEncodeParam();
param.setCompression(TIFFEncodeParam.COMPRESSION_JPEG_TTN2);
ImageEncoder encoder = ImageCodec.createImageEncoder("TIFF", out,
param);
encoder.encode(firstImage);
out.close();
=================================================
but in the above code i see that encode mathod of the encoder takes the
image.
i am invoking the TiledImageTranscoder to raster a tiff image.can i, on
the
fly give the tiff image as the input to the image encoder so that it
encodes
in the JPEG format.i dont want to create a tiff image first on the disk
and
then access the image to encode it to the jpeg.please suggest me
thanks a lot again.
GVS
-----Original Message-----
From: Thomas DeWeese [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 22, 2003 12:56 PM
To: Batik Users
Subject: Re: outofmemory error in batik transcoder
GVS Srinivas wrote:
thanks for the input thomas,
i think saving image of size 400 mb of an image cant be afforded by us.
Well, you might try using one of the supported forms of compressed
Tiff.
This includes JPEG Compression. The second argument to the
TIFFImageEncoder
is a TIFFEncodeParam object. You can construct one and call:
param.setCompression(TIFFEncodeParam.COMPRESSION_JPEG_TTN2);
To turn on JPEG compression of the image data (the file is still a Tiff
file).
The encoder also supports, COMPRESSION_PACKBITS (a run length encoding),
and
COMPRESSION_DEFLATE ("gzip" compression). To be honest I've never really
tried
either of these but the TIFF Encoder we use (from JAI) should support
them.
Also these are getting pretty far "off the beaten path" for Tiff files
so
what ever software you are using down stream may or may not be able to
read
them.
i tried the other option of increasing the memory of java while starting
my
tomcat(Xmx512m ),i observed an improvement but still it seems to choke
the
memory.Is there any plan of batik enhancing the JPEGTranscoder?.
I don't have any plans. The biggest problem is that the com.sun JPEG
encoder
which we use takes the entire image at one time (no tiled interface). BTW
for a 400MB image you will need to give it at least a Gig of memory as
I know it needs to copy that image at least once for output (800MB).
thanks a lot for the support.
regds
GVS
-----Original Message-----
From: Thomas DeWeese [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 21, 2003 7:31 PM
To: Batik Users
Subject: Re: outofmemory error in batik transcoder
GVS Srinivas wrote:
hi ,
thanks for the info.
i tried using TiledImageTranscoder
1. it was saying that the constrcutor is protected.
The file has it's own main which was intended to construct the
Transcoder, but I don't think there is much of a problem making it
public for use in a larger application.
2.i made the constructor public and tried instantiating i tried in the
following way
====================================
FileOutputStream fos = new FileOutputStream("d:\\gvs.tiff");
TiledImageTranscoder tit = new TiledImageTranscoder();
tit.addTranscodingHint(KEY_WIDTH, new Float(10240));
tit.transcode(new TranscoderInput("file:" + "d:\\test.svg"),
new TranscoderOutput(fos));
====================================
it was creating a file as large as 400MB.i am not sure where iam
commiting
some mistake.please help me out.
I don't think there is a mistake, the Tiff file is uncompressed,
so assuming a mostly square document: 4*10,000*10,000 = 400,000,000
bytes
=
400MB.
(That is 4 bytes per pixel * 10,000 pixels across * 10,000 pixels down).
thanks
GVS
-----Original Message-----
From: Thomas DeWeese [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 21, 2003 3:52 PM
To: Batik Users
Subject: Re: outofmemory error in batik transcoder
Felicia Ionascu wrote:
Hi,
I had the same problem several months ago, you can use the
TiledImageTranscoder instead of your JPEG transcoder, of course you
need
to change "TIF" to "JPEG" in the code. This transcoder doesn't use
BufferedImages but RenderedImages, so it decreases dramatically the
memory consumption.
The source is in the "contrib" area of the CVS, thanks to Thomas.
Actually, you can't just replace TIFF with JPEG in the code because
there is no JPEG encoder capable of taking a rendered image and
transcoding
it to a JPEG file (Actually I think javax.imageio may have one but we
are currently based on JDK 1.3 so in that context we don't have it).
But it is true that if you can switch to using TIFF then the tiled
transcoder
is _much_ better for very large images.
Felicia
GVS Srinivas wrote:
hi all ,
i am trying to transform a large svg into an jpg image using batik
jpeg
transcoder and i am encoutering with outofmemoryerror.
when the transcode method is called from the jpegtranscoder.
1.jpegtrascoder---------->>>>>2.imagetranscoder.transcode()----------->>>>3.
Staticrenderer.repaint()----------->>>>>>4.Staticrenderer.updateWorkingBuffe
rs()------>>>>5. Raster.createWritableRaster().after this i am geting
the
outofmemoryerror.
when i debug the code actual wrror is coming in the in databufferInt
class.
would you please send me the code for correcting this problem in the
batik
thanks a lot
GVS
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