Re: [GD-DEVEL] gdImageCopyResampled issue under XP

Hello,

On 6/29/07, Florent Lejeune <[email protected]> wrote:
> Hi,
>
> I'm using gd 2.0.34 with VS 2005 under Windows XP.
> I have a problem with the gdImageCopyResampled function which doesn't produce the same result when my project is compiled in debug and when it's compiled in release : in debug the final png image is fine but in release some colors are degraded (see the 2 images attached).

Can you upload them somewhere or use our issues tracker to post them
(within a new issue)?

>
> Here is my test code :
>
> void bugcopyresample()
> {
>   FILE *outpng,*inpng;
>   int white;
>   gdImagePtr dst,src;
>   // build dst image
>   dst = gdImageCreateTrueColor(100,100);
>   white = gdImageColorAllocate(dst,255,255,255);
>   gdImageAlphaBlending(dst,0);
>   gdImageFill(dst, 0, 0, white);
>   // open src image
>   inpng = fopen("testimage.png", "rb");
>   if (inpng!=NULL)
>   {
>     src=gdImageCreateFromPng(inpng);
>     fclose(inpng);
>   }
>   if (src!=NULL)
>   {
>     gdImageCopyResampled(dst,src,0,0,0,0,dst->sx,dst->sy,src->sx,src->sy);
>     // SAVE TO PNG
>     outpng = fopen("bugCopyResampled.png","wb");
>     if (outpng!=NULL)
>     {
>       gdImagePng(dst,outpng);
>       fclose(outpng);
>     }
>     gdImageDestroy(src);
>   }
>   gdImageDestroy(dst);
> }
>
> Is there a solution or will there be a patch ?

Surely, I receiven a couple of suspect reports this week. It is time
to take a deep look at this function.

--Pierre