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<?php
namespace YOOtheme\Image;
class GDResource extends Resource
{
/**
* @inheritdoc
*/
public static function create($file, $type)
{
$image = false;
if ($type == 'png') {
$image = imagecreatefrompng($file);
}
if ($type == 'gif') {
$image = imagecreatefromgif($file);
}
if ($type == 'jpeg') {
$image = imagecreatefromjpeg($file);
}
if ($type == 'webp') {
$image = imagecreatefromwebp($file);
}
return $image ? static::normalizeImage($image) : false;
}
/**
* @inheritdoc
*/
public static function save($image, $file, $type, $quality, $info = [])
{
if ($type == 'jpeg') {
if (!imagejpeg($image, $file, round($quality))) {
return false;
}
if (
!empty($info['APP13']) &&
($iptc = iptcparse($info['APP13'])) &&
($data = static::embedIptc($iptc, $file)) &&
!file_put_contents($file, $data)
) {
return false;
}
return $file;
}
if ($type == 'png') {
imagealphablending($image, false);
imagesavealpha($image, true);
return imagepng($image, $file, 9) ? $file : false;
}
if ($type == 'gif') {
return imagegif($image, $file) ? $file : false;
}
if ($type == 'webp') {
return imagewebp($image, $file, round($quality)) ? $file : false;
}
}
/**
* @inheritdoc
*/
public static function doCrop($image, $width, $height, $x, $y)
{
$cropped = static::createImage($width, $height);
imagecopy($cropped, $image, 0, 0, intval($x), intval($y), imagesx($image), imagesy($image));
imagedestroy($image);
return $cropped;
}
/**
* @inheritdoc
*/
public static function doCopy(
$image,
$width,
$height,
$dstX,
$dstY,
$srcX,
$srcY,
$dstWidth,
$dstHeight,
$srcWidth,
$srcHeight,
$background = 'transparent'
) {
$resampled = static::createImage($width, $height, $background);
imagecopyresampled(
$resampled,
$image,
$dstX,
$dstY,
$srcX,
$srcY,
$dstWidth,
$dstHeight,
$srcWidth,
$srcHeight
);
imagedestroy($image);
return $resampled;
}
/**
* @inheritdoc
*/
public static function doResize(
$image,
$width,
$height,
$dstWidth,
$dstHeight,
$background = 'transparent'
) {
return static::doCopy(
$image,
$width,
$height,
($width - $dstWidth) / 2,
($height - $dstHeight) / 2,
0,
0,
$dstWidth,
$dstHeight,
imagesx($image),
imagesy($image),
$background
);
}
/**
* @inheritdoc
*/
public static function doRotate($image, $angle, $background = 'transparent')
{
$rotated = imagerotate($image, $angle, static::parseColor($background));
imagedestroy($image);
return $rotated;
}
/**
* Creates an image resource.
*
* @param int $width
* @param int $height
* @param mixed $color
*
* @return resource
*/
protected static function createImage($width, $height, $color = 'transparent')
{
$rgba = static::parseColor($color);
$image = imagecreatetruecolor($width, $height);
imagefill($image, 0, 0, $rgba);
if ($color == 'transparent') {
imagecolortransparent($image, $rgba);
}
return $image;
}
/**
* Normalizes an image to be true color and transparent color.
*
* @param resource $image
*
* @return resource
*/
protected static function normalizeImage($image)
{
if (imageistruecolor($image) && imagecolortransparent($image) == -1) {
return $image;
}
$width = imagesx($image);
$height = imagesy($image);
$canvas = static::createImage($width, $height);
imagecopy($canvas, $image, 0, 0, 0, 0, $width, $height);
imagedestroy($image);
return $canvas;
}
/**
* Embeds an image IPTC data.
*
* @param array $iptc
* @param string $file
*
* @return string
*/
protected static function embedIptc(array $iptc, $file)
{
$iptcdata = '';
foreach ($iptc as $tag => $value) {
$tag = explode('#', $tag, 2);
$value = join(' ', (array) $value);
$length = strlen($value);
$iptcdata .= chr(0x1c) . chr($tag[0]) . chr($tag[1]);
if ($length < 0x8000) {
$iptcdata .= chr($length >> 8) . chr($length & 0xff);
} else {
$iptcdata .=
chr(0x80) .
chr(0x04) .
chr(($length >> 24) & 0xff) .
chr(($length >> 16) & 0xff) .
chr(($length >> 8) & 0xff) .
chr($length & 0xff);
}
$iptcdata .= $value;
}
return iptcembed($iptcdata, $file);
}
}