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From Harshini Madurapperuma <harshini.madurapper...@ifs.lk>
Subject 16-bit Bitmap support in BmpImage.java class ?
Date Wed, 04 Jun 2008 04:21:53 GMT
Hi

I have the fop version 0.20.5 and a bit difficult to go for higher version for the moment,
and I have to work with bitmap images. BmpImage.java doesn't support for 16-bit images. It
throws the exception

"[ERROR] Error in XObject : Image (file:./graphics/SESSION/logbw_16.bmp) has 16 which is not
a supported BMP format..."

Will I be able to get the code for 16-bit support?

Many thanks in Advance
Harshini.



-----Original Message-----
From: Jeremias Maerki [mailto:dev@jeremias-maerki.ch]
Sent: Thursday, April 03, 2008 12:55 PM
To: fop-users@xmlgraphics.apache.org
Subject: Re: Bitmap support in BmpImage.java class ?

You obviously missed the announcement of 0.95beta. Please try it out.

On 03.04.2008 07:56:23 Harshini Madurapperuma wrote:
> Hi Jeremias,
>
> I was working with Bitmap processing and the FOP version 0.94 doesn't
> support 16 bit bitmaps. Then You said the newer version FOP Trunk (
> 0.95) will definetly work for 16 bits and it'll be available by the
> end of February/March this year.
>
> Is it available now? If so can I get code for 16 bit support?
>
> Thanx in advance
> Regard
> Harshini
>
>
>
> -----Original Message-----
> From: Jeremias Maerki [mailto:dev@jeremias-maerki.ch]
> Sent: Wednesday, February 13, 2008 3:08 PM
> To: fop-users@xmlgraphics.apache.org
> Subject: Re: Bitmap support in BmpImage.java class ?
>
> I know 16 bit works with FOP Trunk (and 0.95 when it is available). I don't know about
32 bit because I don't have a bitmap editor that can save 32-bit BMP images. If you can send
me such a 32bit BMP I'll gladly test it with FOP Trunk.
>
> 0.94 still has the old image loading package. However, it could be that it supports 16
bit images. I haven't checked but if it does you may be able to get an idea how to decode
16bit images directly. FOP Trunk contains a completely new image loading framework which mostly
uses ImageIO to load images so I don't really care about the individual formats anymore but
delegate that to the codecs. This is similar to using JAI. But trust me, you don't want to
backport the new image loading framework back into 0.20.5. That's far more work than hacking
JAI into 0.20.5 to load all sorts of BMP images.
>
> So why don't you go with the JAI suggestion? I have no easier solution for you.
>
> On 13.02.2008 10:04:57 Harshini Madurapperuma wrote:
> > Hi Jeremias,
> >
> > Thanks for your valid suggestions. Does 0.95 supports for 16 and 32
> > bit images? What about the previous versions before 0.95? If you
> > have a higher version can I get the algorithm or the code?
> >
> > Thanks
> > Harshini.
> >
> > -----Original Message-----
> > From: Jeremias Maerki [mailto:dev@jeremias-maerki.ch]
> > Sent: Wednesday, February 13, 2008 12:36 PM
> > To: fop-users@xmlgraphics.apache.org
> > Subject: Re: Bitmap support in BmpImage.java class ?
> >
> > Sure, you can. Either you replace BmpImage with the JAI implementation as discussed
earlier or you change BmpImage. In the latter case, you have to convert the 16 and 32 bit
image data to 24 bit RGB. Otherwise, the renderers will not process the image data correctly
(FOP Trunk is much more flexible here). For this you need to know a few things about the BMP
format. Start here to get more information:
> > http://en.wikipedia.org/wiki/BMP_file_format
> >
> > I think it's probably easiest if you use ImageIO or JAI to load BMP
> > images and convert them to the required 24bit pixel stream using the
> > BufferedImage.getRGB() method as done in JAIImage. But if I were you I'd try to
upgrade FOP at least as soon as 0.95 is available next month.
> >
> > On 13.02.2008 05:11:01 Harshini Madurapperuma wrote:
> > >  Hi all;
> > >
> > > I have the fop version 0.20.5, and I have to work with bitmap images.
> > > In BmpImage.java class the code supports only for 1,4,8 and 24 bit
> > > sizes, otherwise it throws an exception. Can't I modify this to
> > > support for 16 and 32 bits also with out changing the fop version.
> > > Your suggestions would be greatly appreciated.
> > >
> > > if (this.m_bitsPerPixel == 1)
> > >             bytes = (this.m_width + 7) / 8;
> > >         else if (this.m_bitsPerPixel == 24)
> > >             bytes = this.m_width * 3;
> > >         else if (this.m_bitsPerPixel == 4 || this.m_bitsPerPixel == 8)
> > >             bytes = this.m_width / (8 / this.m_bitsPerPixel);
> > >         else
> > >             throw new FopImageException("Image (" + this.m_href.toString()
> > >                                         + ") has " + this.m_bitsPerPixel
> > >                                         + " which is not a
> > > supported BMP format...");
> > >
> > > Regards,
> > > Harshini.
> >
> >
> >
> > Jeremias Maerki
> >
> >
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>
>
>
> Jeremias Maerki
>
>
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Jeremias Maerki


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