[Gambas-user] get color from drawingarea point

[Jussi Lahtinen]

To be more clear...

this to outside of loop:
tmpImage = DrawingArea1.Grab().Image

this to inside of loop:
c = tmpImage[x, y]

But like Benoit said, it's not necessary in sync with DrawingArea
internal buffer... depends on situation.
I have used that kind of code with pictures, to gain more speed;
tmpImage = SomePicture.Image


Jussi



2009/4/22 Benoît Minisini <gambas at ...1...>:
>> hi,
>> I need to get the color of point into drawingaera.
>> I use "c = DrawingArea1.Grab().Image[x, y]"
>> This works well, but for a Area of 512 x 512 points it needs more than 10
>> minutes
>> How can I accelerate this function?
>>
>> kind regards
>> Jürgen
>
> On X-Window, you don't have access to the pixel data of the buffer used by a
> DrawingArea, so it will always be slow.
>
> To be fast, you must have an Image buffer and keep it in sync with the
> DrawingArea internal buffer. Not easy...
>
> Regards,
>
> --
> Benoît
>
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