Can gil library in boost 1.49 load png palette images? - Boost-users - lists.preview.boost.org

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Can gil library in boost 1.49 load png palette images?

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Guangchao Wang

15 Nov 2013 15 Nov '13

9:17 a.m.

I'm tried to load a png which can be found in the attachment, I find the color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported. Can you give me some help about how to load such PNG with boost.gil library? Thank you very much. Best, Guangchao

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Slava

15 Nov 15 Nov

10:13 a.m.

New subject: Can gil library in boost 1.49 load png palette images?

On Fri, 15 Nov 2013 10:17:42 +0100, Guangchao Wang wrote:

I'm tried to load a png which can be found in the attachment, I find the color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported.

Can you give me some help about how to load such PNG with boost.gil library?

Thank you very much.

Best, Guangchao

Sorry for probably off-topic, but, in a nutshell, what is the purpose of boost::gil in boost? Wouldn't using a specialized library, say ImageMagick, be a much better alternative? Regards, Slava

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Mateusz Loskot

10:26 a.m.

New subject: Can gil library in boost 1.49 load png palette images?

On 15 November 2013 10:13, Slava wrote:

On Fri, 15 Nov 2013 10:17:42 +0100, Guangchao Wang wrote:

...
I'm tried to load a png which can be found in the attachment, I find the color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported.

Can you give me some help about how to load such PNG with boost.gil library?

Please, start new thread or at least change the subject line! Best regards, -- Mateusz Loskot, http://mateusz.loskot.net

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Guangchao Wang

18 Nov 18 Nov

3:02 a.m.

New subject: Can gil library in boost 1.49 load png palette images?

When I found I forgot to load the image as attachment, I cancel sending the mail, but I didn't found that the mail has already been sent. On Fri, Nov 15, 2013 at 6:26 PM, Mateusz Loskot wrote:

On 15 November 2013 10:13, Slava wrote:

...
On Fri, 15 Nov 2013 10:17:42 +0100, Guangchao Wang < guangchao0831@gmail.com> wrote:

...
I'm tried to load a png which can be found in the attachment, I find the color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported.

Can you give me some help about how to load such PNG with boost.gil library?

Please, start new thread or at least change the subject line!

Best regards, -- Mateusz Loskot, http://mateusz.loskot.net _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Guangchao Wang

3:07 a.m.

New subject: Can gil library in boost 1.49 load png palette images?

There are already some functionality implemented with boost gil lbrary, my task is adding new type images support, so I still need to use gil library. Thank you for your help. On Fri, Nov 15, 2013 at 6:13 PM, Slava wrote:

On Fri, 15 Nov 2013 10:17:42 +0100, Guangchao Wang < guangchao0831@gmail.com> wrote:

I'm tried to load a png which can be found in the attachment, I find the

...
color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported.

Can you give me some help about how to load such PNG with boost.gil library?

Thank you very much.

Best, Guangchao

Sorry for probably off-topic, but, in a nutshell, what is the purpose of boost::gil in boost? Wouldn't using a specialized library, say ImageMagick, be a much better alternative?

Regards, Slava

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Christian Henning

15 Nov 15 Nov

3:30 p.m.

New subject: Can gil library in boost 1.49 load png palette images?

Hi Guangchao, you can try the new IO lib which currently lives inside boost trunk. It should be able to read PNG_COLOR_TYPE_PALETTE. Let me know if you have any issues. Thanks, Christian On Fri, Nov 15, 2013 at 4:17 AM, Guangchao Wang wrote:

I'm tried to load a png which can be found in the attachment, I find the color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported.

Can you give me some help about how to load such PNG with boost.gil library?

Thank you very much.

Best, Guangchao

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Guangchao Wang

18 Nov 18 Nov

3:05 a.m.

New subject: Can gil library in boost 1.49 load png palette images?

OK Thank you very much, later I will try the new IO lib. Best regards, Guangchao On Fri, Nov 15, 2013 at 11:30 PM, Christian Henning wrote:

Hi Guangchao,

you can try the new IO lib which currently lives inside boost trunk. It should be able to read PNG_COLOR_TYPE_PALETTE.

Let me know if you have any issues.

Thanks, Christian

On Fri, Nov 15, 2013 at 4:17 AM, Guangchao Wang wrote:

...
I'm tried to load a png which can be found in the attachment, I find the color of this png is PNG_COLOR_TYPE_PALETTE and its depth is 8, I reviewed the code of png_io_private.hpp and found that no such type of PNG is supported.

Can you give me some help about how to load such PNG with boost.gil library?

Thank you very much.

Best, Guangchao

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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participants (4)

Christian Henning
Guangchao Wang
Mateusz Loskot
Slava