Edit report at https://bugs.php.net/bug.php?id=66887&edit=1
ID: 66887
Comment by: remi@php.net
Reported by: mruz at poczta dot onet dot pl
Summary: imagescale - poor quality of scaled image
Status: Feedback
Type: Feature/Change Request
Package: GD related
Operating System: openSUSE 13.1
PHP Version: 5.5.10
Block user comment: N
Private report: N
New Comment:
Can you try with
imagesetinterpolation($oryginal, $alg);
$img = imagescale($oryginal, 600, 400);
$alg option of imagescale is ignored (yes, this is a "goto fail;" bug)
It seems IMG_BILINEAR_FIXED produce this bad quality image.
IMG_BICUBIC_FIXED and IMG_NEAREST_NEIGHBOUR seems to work better.
Previous Comments:
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[2014-03-12 11:18:16] mruz at poczta dot onet dot pl
Bundled, x86_64
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[2014-03-12 11:12:15] pajoye@php.net
Looks like a bug.
Which gd do you use? Bundled or system? See phpinfo
I also need to know which architecture you use (cpu)
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[2014-03-12 11:02:25] mruz at poczta dot onet dot pl
Sorry, http://mruz.pl/test/tmp0.jpg , available file
names: tmp[0-20].jpg
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[2014-03-12 10:55:56] pajoye@php.net
and which result do you get? link pls
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[2014-03-12 10:37:20] mruz at poczta dot onet dot pl
$algs = [
IMG_BELL,
IMG_BESSEL,
IMG_BICUBIC,
IMG_BICUBIC_FIXED,
IMG_BILINEAR_FIXED,
IMG_BLACKMAN,
IMG_BOX,
IMG_BSPLINE,
IMG_CATMULLROM,
IMG_GAUSSIAN,
IMG_GENERALIZED_CUBIC,
IMG_HERMITE,
IMG_HAMMING,
IMG_HANNING,
IMG_MITCHELL,
IMG_POWER,
IMG_QUADRATIC,
IMG_SINC,
IMG_NEAREST_NEIGHBOUR,
IMG_WEIGHTED4,
IMG_TRIANGLE,
];
foreach ($algs as $key => $alg) {
$img = imagescale($oryginal, 600, 400, $alg);
imagejpeg($img, 'tmp'.$key.'.jpg', 90);
echo '<img src="tmp'.$key.'.jpg" /><br />';
}
All images are the same...
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