Image class

image.php

<?php
/**
 * Author: videde
 * Date: 8/21/13
 * Time: 1:27 AM
 */

class Image
{
    public static function resizeImage($filename, $url, $newWidth, $newHeight, $square = false)
    {
        $img = self::do_curl($url);
        $margin = 5;
        if ($img != "") {
            $extension = 'tmp';
            file_put_contents(dirname(__FILE__) . '/logos/original_' . $filename . '.' . $extension, $img);
            $extension = self::getImageExtension(dirname(__FILE__) . '/logos/original_' . $filename . '.' . $extension, false);
            $path = dirname(__FILE__) . '/logos/original_' . $filename . '.' . $extension;
            rename(dirname(__FILE__) . '/logos/original_' . $filename . '.tmp', $path);
            switch ($extension) {
                case 'png':
                    $source = imagecreatefrompng($path);
                    break;
                case 'gif':
                    $source = imagecreatefromgif($path);
                    break;
                default:
                    $source = imagecreatefromjpeg($path);
                    break;
            }
            // Get new sizes
//        list($width, $height) = getimagesizefromstring($img); // PHP >= 5.4
            list($width, $height) = getimagesize(dirname(__FILE__) . '/logos/original_' . $filename . '.' . $extension);

            // Load
            if ($square == false) {
                $percent = sqrt(($newWidth * $newHeight * 1.0) / ($width * $height));
                $finalWidth = $width * $percent;
                $finalHeight = $height * $percent;
                $resizedWidth = $finalWidth - ($margin * 2);
                $resizedHeight = $resizedWidth * ($finalHeight * 1.0 / $finalWidth);
                $thumb = imagecreatetruecolor($finalWidth, $finalHeight);
                $x = $margin;
                $y = ($finalHeight - $resizedHeight) / 2;
            } else {
                $finalHeight = $finalWidth = max($newWidth, $newHeight);
                if ($width > $height) {
                    $resizedWidth = $finalWidth - ($margin * 2);
                    $resizedHeight = $resizedWidth * ($height * 1.0 / $width);
                    $x = $margin;
                } else {
                    $resizedWidth = $finalWidth * ($width * 1.0 / $height);
                    if ($finalWidth - $resizedWidth < $margin * 2) {
                        $resizedWidth = $finalWidth - ($margin * 2);
                        $resizedHeight = $resizedWidth * ($height * 1.0 / $width);
                    } else {
                        $resizedHeight = $finalHeight;
                    }

                    $x = ($finalWidth - $resizedWidth) / 2;
                }
                $y = ($finalHeight - $resizedHeight) / 2;

                $thumb = imagecreatetruecolor($finalWidth, $finalHeight);
            }
            $bg = imagecolorallocate($thumb, 255, 255, 255);
            imagefilledrectangle($thumb, 0, 0, $finalWidth, $finalHeight, $bg);

//            if ($extension == 'png' || $extension == 'gif') {
////                imagealphablending($thumb, false);
//            }

            // Resize
            imagecopyresized($thumb, $source, $x, $y, 0, 0, $resizedWidth, $resizedHeight, $width, $height);

            // add border
            $border_color = imagecolorallocate($thumb, 0, 0, 0);
            imagerectangle($thumb, 0, 0, $finalWidth - 1, $finalHeight - 1, $border_color);

            // Output
            self::saveImage($thumb, $extension, dirname(__FILE__) . '/logos/' . $filename . '.' . $extension);

            imagedestroy($thumb);
            imagedestroy($source);

            echo "$url - $filename.$extension<br>";
            return true;
        } else {
            echo "Can\'t save image at $url<br>";
            return false;
        }
    }

    public static function getImageExtension($filename, $includeDot = true, $shorterExtensions = true)
    {
        $image_info = @getimagesize($filename);
        if (!$image_info || empty($image_info[2])) {
            return false;
        }

        if (!function_exists('image_type_to_extension')) {
            /**
             * Given an image filename, get the file extension.
             *
             * @param $imagetype
             *   One of the IMAGETYPE_XXX constants.
             * @param $include_dot
             *   Whether to prepend a dot to the extension or not. Default to TRUE.
             * @param $shorterExtensions
             *   Whether to use a shorter extension or not. Default to TRUE.
             * @return
             *   A string with the extension corresponding to the given image type, or
             *   FALSE on failure.
             */
            function image_type_to_extensiona($imagetype, $include_dot = true)
            {
                // Note we do not use the IMAGETYPE_XXX constants as these will not be
                // defined if GD is not enabled.
                $extensions = array(
                    1 => 'gif',
                    2 => 'jpeg',
                    3 => 'png',
                    4 => 'swf',
                    5 => 'psd',
                    6 => 'bmp',
                    7 => 'tiff',
                    8 => 'tiff',
                    9 => 'jpc',
                    10 => 'jp2',
                    11 => 'jpf',
                    12 => 'jb2',
                    13 => 'swc',
                    14 => 'aiff',
                    15 => 'wbmp',
                    16 => 'xbm',
                );

                // We are expecting an integer between 1 and 16.
                $imagetype = (int)$imagetype;
                if (!$imagetype || !isset($extensions[$imagetype])) {
                    return false;
                }

                return ($include_dot ? '.' : '') . $extensions[$imagetype];
            }
        }

        $extension = image_type_to_extension($image_info[2], $includeDot);
        if (!$extension) {
            return false;
        }

        if ($shorterExtensions) {
            $replacements = array(
                'jpeg' => 'jpg',
                'tiff' => 'tif',
            );
            $extension = strtr($extension, $replacements);
        }
        return $extension;
    }

    public static function saveImage($img, $extension, $filename)
    {
        if ($extension == 'png' || $extension == 'gif') {
            imagesavealpha($img, true);
            if ($extension == 'png')
                imagepng($img, $filename);
            else
                imagegif($img, $filename);
        } else {
            imagejpeg($img, $filename);
        }
    }
    public static function hex2Rgb($hex) {
        $hex = str_replace("#", "", $hex);

        if(strlen($hex) == 3) {
            $r = hexdec(substr($hex,0,1).substr($hex,0,1));
            $g = hexdec(substr($hex,1,1).substr($hex,1,1));
            $b = hexdec(substr($hex,2,1).substr($hex,2,1));
        } else {
            $r = hexdec(substr($hex,0,2));
            $g = hexdec(substr($hex,2,2));
            $b = hexdec(substr($hex,4,2));
        }
        $rgb = array($r, $g, $b);
        //return implode(",", $rgb); // returns the rgb values separated by commas
        return $rgb; // returns an array with the rgb values
    }
}