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<?php
function resize_image(string $src_path, string $dst_path, int $max_width, int $max_height, bool $set_format = true, bool $stretch = false): int|null
{
if ($src_path == "") {
return -2;
}
$image = getimagesize($src_path);
if ($image == false) {
return -1;
}
$format = $set_format ? ".webp" : "";
$width = $image[0];
$height = $image[1];
$ratio = min($max_width / $width, $max_height / $height);
$new_width = $stretch ? $max_width : (int) ($width * $ratio);
$new_height = $stretch ? $max_height : (int) ($height * $ratio);
$input_path = escapeshellarg($src_path);
$output_path = escapeshellarg("$dst_path$format");
$result_code = null;
exec(command: "magick convert $input_path -coalesce -resize {$new_width}x{$new_height}! -loop 0 $output_path", result_code: $result_code);
return $result_code;
}
function create_image_bundle(string $src_path, string $dst_path, int $max_width, int $max_height, bool $set_format = true, bool $stretch = false): int|null
{
if (!is_dir($dst_path)) {
if (!mkdir($dst_path, 0777, true)) {
return -3;
}
}
if ($err = resize_image($src_path, "$dst_path/3x", $max_width, $max_height, $set_format, $stretch)) {
array_map("unlink", glob("$dst_path/*.*"));
rmdir($dst_path);
return $err;
}
if ($err = resize_image($src_path, "$dst_path/2x", round($max_width / 2), round($max_height / 2), $set_format, $stretch)) {
array_map("unlink", glob("$dst_path/*.*"));
rmdir($dst_path);
return $err;
}
if ($err = resize_image($src_path, "$dst_path/1x", round($max_width / 4), round($max_height / 4), $set_format, $stretch)) {
array_map("unlink", glob("$dst_path/*.*"));
rmdir($dst_path);
return $err;
}
return null;
}
function get_file_extension(string $path): string|null
{
if ($file = getimagesize($path)) {
return image_type_to_extension(intval($file[2]), false);
}
return null;
}
function does_file_meet_requirements(string $path, int $max_width, int $max_height): array
{
$file = getimagesize($path);
if (!$file) {
return [false, null];
}
return [$file[0] <= $max_width && $file[1] <= $max_height, image_type_to_extension(intval($file[2]), false)];
}
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