ImageResizer.php
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<?php
namespace frontend\components;
use Yii;
use yii\imagine\Image;
use Imagine\Image\Point;
use Imagine\Image\ManipulatorInterface;
/**
*
* @author FilamentV <vortex.filament@gmail.com>
* @copyright (c), Thread
*/
class ImageResizer
{
const BASE_PATH_TO_CACHE = '@uploads/thumbs';
const BASE_URL_TO_CACHE = '/uploads/thumbs/';
/**
* @param $image
* @param $width
* @param $height
* @param string $prefix
* @return string
*/
public static function generateName($image, $width, $height, $prefix = 'thumb{$width}_{$height}.')
{
return str_replace(['{$width}', '{$height}'], [$width, $height], $prefix) . basename($image);
}
/**
* @param $image
* @param $width
* @param $height
* @param string $prefix
* @return null|string
*/
public static function getThumb($image, $width, $height, $prefix = 'thumb{$width}_{$height}.')
{
if (is_file($image)) {
$base = Yii::getAlias(self::BASE_PATH_TO_CACHE) . '/';
$name = self::generateName($image, $width, $height, $prefix);
if (is_file($base . $name)) {
return self::BASE_URL_TO_CACHE . $name;
}
$image = Image::thumbnail($image, $width, $height, ManipulatorInterface::THUMBNAIL_INSET);
if ($image->save($base . $name, [
'jpeg_quality' => 90,
])
) {
return self::BASE_URL_TO_CACHE . $name;
}
}
return null;
}
/**
* @param $image
* @param $watermark
* @param $color
* @param $prefix
* @return null|string
*/
public static function getSign($image, $watermark, $color, $prefix)
{
if (is_file($image) && is_file($watermark) && !empty($color)) {
$base = Yii::getAlias(self::BASE_PATH_TO_CACHE) . '/';
$name = basename($image);
if (is_file($base . $prefix . $name)) {
return self::BASE_URL_TO_CACHE . $prefix . $name;
}
self::changeColor($image, $base . $prefix . $name, $color);
self::setWatermark($base . $prefix . $name, $base . $prefix . $name, $watermark);
return self::BASE_URL_TO_CACHE . $prefix . $name;
} else {
// echo 'no';
}
return null;
}
/**
* @param $source
* @param $destination
* @param $watermark
*/
public static function setWatermark($source, $destination, $watermark)
{
if (is_file($source) && is_file($watermark)) {
$watermark = Image::getImagine()->open($watermark);
$image = Image::getImagine()->open($source);
$size = $image->getSize();
$wSize = $watermark->getSize();
//
$image->paste($watermark, new Point(($size->getWidth() - $wSize->getWidth()) / 2, ($size->getHeight() - $wSize->getHeight()) / 2));
//
$image->save($destination);
}
}
/**
* @param $source
* @param $destination
* @param $color
* @return null|string
*/
public static function changeColor($source, $destination, $color)
{
// echo $color;
if (is_file($source)) {
/* Convert hexdec color string to rgb(a) string */
/**
* @param $image
* @param $color
*/
$im = imagecreatefrompng($source);
imagealphablending($im, true); // setting alpha blending on
imagesavealpha($im, true); // save alphablending setting (important)
static::imagefon($im, $color);
imagepng($im, $destination);
return $destination;
}
return null;
}
/**
* @param $image
* @param $color
*/
public static function imagefon(&$image, $color)
{
$c = ImageResizer::hex2rgba($color);
$width = imagesx($image);
$height = imagesy($image);
// $gray = imagecolorat($image, 0, 0);
for ($x = 0; $x < $width; $x++) {
for ($y = 0; $y < $height; $y++) {
$rgb = imagecolorat($image, $x, $y);
if (16777215 == $rgb) {
// imagesetpixel($image, $x, $y, 19997000);
imagesetpixel($image, $x, $y, imagecolorallocate($image, $c[0], $c[1], $c[2]));
}
// imagesetpixel($image, $x, $y, imagecolorallocate($image, 0, 0, 0));
// } else {
// imagesetpixel($image, $x, $y, imagecolortransparent($image, imagecolorallocate($image, 0, 0, 0)));
// }
}
}
}
/**
* @param $color
* @return array
*/
public static function hex2rgba($color)
{
//
$default = [0, 0, 0];
//Return default if no color provided
if (empty($color)) {
return $default;
}
//Sanitize $color if "#" is provided
if ($color[0] == '#') {
$color = substr($color, 1);
}
//Check if color has 6 or 3 characters and get values
if (strlen($color) == 6) {
$hex = array($color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5]);
} elseif (strlen($color) == 3) {
$hex = array($color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2]);
} else {
return $default;
}
//Convert hexadec to rgb
$rgb = array_map('hexdec', $hex);
//
return $rgb;
}
}