Re: [platform-swt-dev] 'Unsupported color depth' error on Linux

[Randy Hudson <hudsonr@xxxxxxxxxx>]

Rajeev,

You left out an important piece of information.
 How are you constructing the Image?  If it is simply a new Image(display,
width, height), the color depth is the same as the Display's color depth.
 So this will vary even just on windows.  We should continue
this discussion on the newsgroup if necessary.

-Randy

"Udaya Tejwani" <udayatejwani@xxxxxxxxxxx> Sent by: platform-swt-dev-admin@xxxxxxxxxxx 07/29/2004 06:26 PM Please respond to platform-swt-dev

To:        platform-swt-dev@xxxxxxxxxxx         cc:                 Subject:        Re: [platform-swt-dev] 'Unsupported color depth' error on Linux

What Chris simply means is replace the following code

>imageLoader.save(..., SWT.IMAGE_GIF);

with

>imageLoader.save(..., SWT.IMAGE_BMP);

Hope this helps.

Udaya Tejwani

>From: Rajeev Sikka <sikkar@xxxxxxxxxx>
>Reply-To: platform-swt-dev@xxxxxxxxxxx
>
>Hi Chris,
>
>I could not follow your answer. Could you elaborate.
>
>Thanks,
>Rajeev
>
>
>
>
>Christophe Cornu <Christophe_Cornu@xxxxxxxxxx>
>Sent by: platform-swt-dev-admin@xxxxxxxxxxx
>07/29/2004 12:28 PM
>Please respond to platform-swt-dev
>
>         To:     platform-swt-dev@xxxxxxxxxxx
>         cc:
>         Subject:        Re: [platform-swt-dev] 'Unsupported color depth'
>error on Linux
>
>
>
>Hi Rajeev,
>
>Unlike GIF, the BMP encoder should support all the bit depths.
>
>Chris
>
>
>
>
>Rajeev Sikka <sikkar@xxxxxxxxxx>
>Sent by: platform-swt-dev-admin@xxxxxxxxxxx
>07/29/2004 01:42 PM
>
>Please respond to
>platform-swt-dev
>
>
>To
>platform-swt-dev@xxxxxxxxxxx
>cc
>
>Subject
>[platform-swt-dev] 'Unsupported color depth' error on Linux
>
>
>Hi,
>
>I have the following code sequence:
>
>...
>Image image = ...
>...
>ImageData imageData = image.getImageData();
>...
>ImageLoader imageLoader = new ImageLoader();
>imageLoader.save(..., SWT.IMAGE_GIF);
>...
>
>This runs fine on windows but gives 'Unsupported color depth' error on
>Linux. The reason is that the code for Image::getImageData() is different
>for Windows and Linux. On Linux the returned ImageData object has color
>depth 24 (on windows its 8). Here is the code snippet from Image.java on
>Linux:
>
>ImageData data = "" ImageData(width, height, 24, palette);
>
>Subsequently, the function ImageLoader::save which indirectly calls
>unloadIntoByteStream(ImageData ) in file GIFFileFormat.java throws a
>SWT.error, since valid color depths are only 1, 4, and 8.
>
>Is there any workaround/alternative way to get around this?
>
>Thanks,
>Rajeev

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