Thanks. I'm using the function as pure, and so far, so good. Cheers, -
Conal
On 9/2/07, shelarcy <[EMAIL PROTECTED]> wrote:
>
> Hi Conal,
>
> On Wed, 29 Aug 2007 09:42:15 +0900, Conal Elliott <[EMAIL PROTECTED]> wrote:
> > Is there any reason for imageCreateFromPixelArray to be in IO? I want
> to
> > use it as a pure function (via unsafePerformIO), and I'm wondering if
> there
> > are any gotchas. - Conal
>
> I think it's just implementation reason.
>
> imageCreateFromPixelArray create pixelBuffer and set pixelBuffer
> color interanally, and then create image by pixelBuffer.
>
>
> imageCreateFromPixelArray :: Array Point Color -> IO (Image ())
> imageCreateFromPixelArray pixels
> = let (Point x y) = snd (bounds pixels)
> in imageCreateFromPixels (sz (x+1) (y+1)) (elems pixels)
>
> imageCreateFromPixels :: Size -> [Color] -> IO (Image ())
> imageCreateFromPixels size colors
> = do pb <- pixelBufferCreate size
> pixelBufferSetPixels pb colors
> imageCreateFromPixelBuffer pb -- image deletes pixel buffer
>
> http://darcs.haskell.org/wxhaskell/wxcore/src/Graphics/UI/WXCore/Image.hs
>
>
> So I think we can use this function as a safe one.
>
> Best Regards,
>
> --
> shelarcy <shelarcy hotmail.co.jp>
> http://page.freett.com/shelarcy/
>
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