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<?php
$ptrn=NewMagickWand();
MagickReadImage($ptrn,'pattern.tif');
$pw=NewPixelWand();
PixelSetColor($pw,'black');
PixelSetAlpha($pw,0);
PixelSetOpacity($pw,0);

// only for test purposes - this transfomation works.
MagickShearImage($ptrn,$pw,15,0);

// only for test purposes - this transformation works on linux and hangs php on windows.
MagickRotateImage($ptrn,$pw,45);

$atdw=NewDrawingWand();
DrawAffine($atdw,
 floatval($_GET['sx']),
 floatval($_GET['sy']),
 floatval($_GET['rx']),
 floatval($_GET['ry']),
 floatval($_GET['tx']),
 floatval($_GET['ty']));

if (WandHasException($atdw)) // it also works and didn't show an error
{
    $r=DrawGetException($atdw);
    print_r($r);exit;
};

$r=MagickAffineTransformImage($ptrn,$atdw); //this does nothing and no errorcode returns...
if (!$r||WandHasException($ptrn))
{
     echo MagickGetExceptionString($ptrn);
     exit;
};

//MagickCompositeImage($ptrn,$mw,MW_OverCompositeOp,0,0); /// old code fragment, there was some image compositing, it works good
$nw=$ptrn;

if (!$nw)
{
     echo MagickGetExceptionString($nw);
     exit;
};

MagickSetImageFormat($nw,'JPG');
MagickEchoImageBlob($nw);
?>