kabano/includes/images.php

42 lines
1.5 KiB
PHP
Executable File

<?
function generate_image_thumbnail($source_image_path, $thumbnail_image_path, $width, $height)
{
list($source_image_width, $source_image_height, $source_image_type) = getimagesize($source_image_path);
switch ($source_image_type) {
case IMAGETYPE_GIF:
$source_gd_image = imagecreatefromgif($source_image_path);
break;
case IMAGETYPE_JPEG:
$source_gd_image = imagecreatefromjpeg($source_image_path);
break;
case IMAGETYPE_PNG:
$source_gd_image = imagecreatefrompng($source_image_path);
break;
}
if ($source_gd_image === false) {
return false;
}
$src_x = 0;
$src_y = 0;
$thumbnail_image_height = $height;
$thumbnail_image_width = $width;
// If the limitation is on the height (cuts on the width)
if($height*$source_image_width/$source_image_height > $width) {
$src_x = (int)(($source_image_width - $source_image_height * $width / $height) / 2);
$source_image_width = $source_image_height * $width / $height;
} else {
$src_y = (int)(($source_image_height - $source_image_width * $height / $width) / 2);
$source_image_height = $source_image_width * $height / $width;
}
$thumbnail_gd_image = imagecreatetruecolor($thumbnail_image_width, $thumbnail_image_height);
imagecopyresampled($thumbnail_gd_image, $source_gd_image, 0, 0, $src_x, $src_y, $thumbnail_image_width, $thumbnail_image_height, $source_image_width, $source_image_height);
imagejpeg($thumbnail_gd_image, $thumbnail_image_path, 90);
imagedestroy($source_gd_image);
imagedestroy($thumbnail_gd_image);
return true;
}
?>