Description:
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I use the thread safe Version php-7.0.0RC2-Win32-VC14-x86.zip as provided on http://windows.php.net/qa/
I have a script to resize images. I use it with PHP 5.6 and everything's fine. The images are broken (look bad) when the same script is used in PHP 7.
I found out that when I use another $mode in the call to imagescale(...) the images are correct.
I looped over all modes and it seems BICUBIX_FIXED, BILINEAR_FIXED and NEAREST_NEIGHBOUR are the only ones producing good images.
I had been using CATMULLROM before.

Test script:
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<?php
$arrInterpolMethod= [
	"IMG_BELL" => IMG_BELL
	, "IMG_BESSEL" => IMG_BESSEL
	, "IMG_BICUBIC" => IMG_BICUBIC
	, "IMG_BICUBIC_FIXED" => IMG_BICUBIC_FIXED
	, "IMG_BILINEAR_FIXED" => IMG_BILINEAR_FIXED
	, "IMG_BLACKMAN" => IMG_BLACKMAN
	, "IMG_BOX" => IMG_BOX
	, "IMG_BSPLINE" => IMG_BSPLINE
	, "IMG_CATMULLROM" => IMG_CATMULLROM
	, "IMG_GAUSSIAN" => IMG_GAUSSIAN
	, "IMG_GENERALIZED_CUBIC" => IMG_GENERALIZED_CUBIC
	, "IMG_HERMITE" => IMG_HERMITE
	, "IMG_HAMMING" => IMG_HAMMING
	, "IMG_HANNING" => IMG_HANNING
	, "IMG_MITCHELL" => IMG_MITCHELL
	, "IMG_POWER" => IMG_POWER
	, "IMG_QUADRATIC" => IMG_QUADRATIC
	, "IMG_SINC" => IMG_SINC
	, "IMG_NEAREST_NEIGHBOUR" => IMG_NEAREST_NEIGHBOUR
	, "IMG_WEIGHTED4" => IMG_WEIGHTED4
	, "IMG_TRIANGLE" => IMG_TRIANGLE
];

if( $im = imagecreatefromjpeg( 'D:/Daten/Lumia_820/WP_20150829_028.jpg' ) ) {

	$MaxWert = 2048;
	$Width = ImagesX($im);
	$Height = ImagesY($im);

	if($Width>$Height) {
		$NeuWidth = $MaxWert;
		$NeuHeight = round( ( $Height * ($NeuWidth / $Width) ) / 4 ) * 4;
	} else {
		$NeuHeight = $MaxWert;
		$NeuWidth = round( ( $Width * ($NeuHeight / $Height) ) / 4 ) * 4;
	}

	foreach( $arrInterpolMethod as $interpolName => $interpolConstant ) {
		$NeuImg = imagescale( $im, $NeuWidth, $NeuHeight, $interpolConstant );
		ImageInterlace( $NeuImg, 1 );
		ImageJPEG($NeuImg, 'D:/Daten/php/WP_20150829_028_'.$interpolName.'.jpg', 80);
		ImageDestroy($NeuImg);
	}

	ImageDestroy($im);
}


Expected result:
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I expect to get 20 not broken looking images