/**
* From: https://stackoverflow.com/questions/4590441/php-thumbnail-image-resizing-with-proportions
*/
function resize(&$img, $size)
{
$pm = new PictshareModel();
$sd = $pm->sizeStringToWidthHeight($size);
$maxwidth = $sd['width'];
$maxheight = $sd['height'];
$width = imagesx($img);
$height = imagesy($img);
if (!ALLOW_BLOATING) {
if ($maxwidth > $width) {
$maxwidth = $width;
}
if ($maxheight > $height) {
$maxheight = $height;
}
}
if ($height > $width) {
$ratio = $maxheight / $height;
$newheight = $maxheight;
$newwidth = $width * $ratio;
} else {
$ratio = $maxwidth / $width;
$newwidth = $maxwidth;
$newheight = $height * $ratio;
}
$newimg = imagecreatetruecolor($newwidth, $newheight);
$palsize = ImageColorsTotal($img);
for ($i = 0; $i < $palsize; $i++) {
$colors = ImageColorsForIndex($img, $i);
ImageColorAllocate($newimg, $colors['red'], $colors['green'], $colors['blue']);
}
imagefill($newimg, 0, 0, IMG_COLOR_TRANSPARENT);
imagesavealpha($newimg, true);
imagealphablending($newimg, true);
imagecopyresampled($newimg, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
$img = $newimg;
}
