Re: Using GdkPixbuf buffers with GraphicsMagick

["Dov Grobgeld" <dov grobgeld gmail com>]

The data of a GdkPixbuf is layed out as a continous allocated chunk of
memory in one of the following format RGBRGBRGB for 24-bit images, or
RGBARGBARGBA, for 32-bit images, where R,G,B,A stands for the red, green,
blue, and alpha components respectively. Lines may be also padded to
row_stride bytes. Since you don't describe what GraphicsMagic() expects and
how you extracts the relevent info from the pixbuf, it is impossible to say
what went wrong.

In any case you can use any library, e.g. cairo, agg, OpenCV, or access the
pixels straight in the GdkPixbuf.

Regards,
Dov

2009/1/6 Luka Napotnik <luka napotnik gmail com>

> Hello.
>
> I'm trying to use GraphicsMagic (the successor of ImageMagick) to
> manipulate a GdkPixbuf image buffer. The problem is that the program
> segfaults, probably due to the raw nature of the buffer which the Magick
> API doesn't handle very good.
> I'm opening the image buffer with MagickReadImageBlob() and then apply
> some filters.
>
> Does anyone have experiences using GdkPixbuf together with
> GraphicsMagick or can anyone suggest alternatives to GraphicsMagick
> which works well with GdkPixbuf?
>
> Greets,
> Luka
>
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