PHP 使用 Imagick 裁切/生成縮略圖/添加水印自動檢測和處理 GIF

<?php

/*
  @版本日期: 版本日期: 2012年1月18日
  @著作權所有: 1024 intelligence ( http://www.1024i.com )
  獲得使用本類庫的許可, 您必須保留著作權聲明信息.
  報告漏洞，意見或建議, 請聯繫 Lou Barnes([email protected])
 */

class lib_image_imagick {

    private $image = null;
    private $type = null;

// 構造函數 
    public function __construct() {
        
    }

// 析構函數 
    public function __destruct() {
        if ($this->image !== null)
            $this->image->destroy();
    }

// 載入圖像 
    public function open($path) {
        $this->image = new Imagick($path);
        if ($this->image) {
            $this->type = strtolower($this->image->getImageFormat());
        }
        return $this->image;
    }

    public function crop($x = 0, $y = 0, $width = null, $height = null) {
        if ($width == null)
            $width = $this->image->getImageWidth() - $x;
        if ($height == null)
            $height = $this->image->getImageHeight() - $y;
        if ($width <= 0 || $height <= 0)
            return;
        if ($this->type == 'gif') {
            $image = $this->image;
            $canvas = new Imagick();
            $images = $image->coalesceImages();
            foreach ($images as $frame) {
                $img = new Imagick();
                $img->readImageBlob($frame);
                $img->cropImage($width, $height, $x, $y);
                $canvas->addImage($img);
                $canvas->setImageDelay($img->getImageDelay());
                $canvas->setImagePage($width, $height, 0, 0);
            }
            $image->destroy();
            $this->image = $canvas;
        } else {
            $this->image->cropImage($width, $height, $x, $y);
        }
    }

    /*
     * 更改圖像大小 
      $fit: 適應大小方式
      'force': 把圖片強制變形成 $width X $height 大小
      'scale': 按比例在安全框 $width X $height 內縮放圖片, 輸出縮放後圖像大小 不完全等於 $width X $height
      'scale_fill': 按比例在安全框 $width X $height 內縮放圖片，安全框內沒有像素的地方填充色, 使用此參數時可設置背景填充色 $bg_color = array(255,255,255)(紅,綠,藍, 透明度) 透明度(0不透明-127完全透明))
      其它: 智能模能 縮放圖像並載取圖像的中間部分 $width X $height 像素大小
      $fit = 'force','scale','scale_fill' 時： 輸出完整圖像
      $fit = 圖像方位值 時, 輸出指定位置部分圖像
      字母與圖像的對應關係如下:
      north_west north north_east
      west center east
      south_west south south_east
     */

    public function resize_to($width = 100, $height = 100, $fit = 'center', $fill_color = array(255, 255, 255, 0)) {
        switch ($fit) {
            case 'force':
                if ($this->type == 'gif') {
                    $image = $this->image;
                    $canvas = new Imagick();
                    $images = $image->coalesceImages();
                    foreach ($images as $frame) {
                        $img = new Imagick();
                        $img->readImageBlob($frame);
                        $img->thumbnailImage($width, $height, false);
                        $canvas->addImage($img);
                        $canvas->setImageDelay($img->getImageDelay());
                    }
                    $image->destroy();
                    $this->image = $canvas;
                } else {
                    $this->image->thumbnailImage($width, $height, false);
                }
                break;
            case 'scale':
                if ($this->type == 'gif') {
                    $image = $this->image;
                    $images = $image->coalesceImages();
                    $canvas = new Imagick();
                    foreach ($images as $frame) {
                        $img = new Imagick();
                        $img->readImageBlob($frame);
                        $img->thumbnailImage($width, $height, true);
                        $canvas->addImage($img);
                        $canvas->setImageDelay($img->getImageDelay());
                    }
                    $image->destroy();
                    $this->image = $canvas;
                } else {
                    $this->image->thumbnailImage($width, $height, true);
                }
                break;
            case 'scale_fill':
                $size = $this->image->getImagePage();
                $src_width = $size['width'];
                $src_height = $size['height'];
                $x = 0;
                $y = 0;
                $dst_width = $width;
                $dst_height = $height;
                if ($src_width * $height > $src_height * $width) {
                    $dst_height = intval($width * $src_height / $src_width);
                    $y = intval(($height - $dst_height) / 2);
                } else {
                    $dst_width = intval($height * $src_width / $src_height);
                    $x = intval(($width - $dst_width) / 2);
                }
                $image = $this->image;
                $canvas = new Imagick();
                $color = 'rgba(' . $fill_color[0] . ',' . $fill_color[1] . ',' . $fill_color[2] . ',' . $fill_color[3] . ')';
                if ($this->type == 'gif') {
                    $images = $image->coalesceImages();
                    foreach ($images as $frame) {
                        $frame->thumbnailImage($width, $height, true);
                        $draw = new ImagickDraw();
                        $draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame);
                        $img = new Imagick();
                        $img->newImage($width, $height, $color, 'gif');
                        $img->drawImage($draw);
                        $canvas->addImage($img);
                        $canvas->setImageDelay($img->getImageDelay());
                        $canvas->setImagePage($width, $height, 0, 0);
                    }
                } else {
                    $image->thumbnailImage($width, $height, true);
                    $draw = new ImagickDraw();
                    $draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image);
                    $canvas->newImage($width, $height, $color, $this->get_type());
                    $canvas->drawImage($draw);
                    $canvas->setImagePage($width, $height, 0, 0);
                }
                $image->destroy();
                $this->image = $canvas;
                break;
            default:
                $size = $this->image->getImagePage();
                $src_width = $size['width'];
                $src_height = $size['height'];
                $crop_x = 0;
                $crop_y = 0;
                $crop_w = $src_width;
                $crop_h = $src_height;
                if ($src_width * $height > $src_height * $width) {
                    $crop_w = intval($src_height * $width / $height);
                } else {
                    $crop_h = intval($src_width * $height / $width);
                }
                switch ($fit) {
                    case 'north_west':
                        $crop_x = 0;
                        $crop_y = 0;
                        break;
                    case 'north':
                        $crop_x = intval(($src_width - $crop_w) / 2);
                        $crop_y = 0;
                        break;
                    case 'north_east':
                        $crop_x = $src_width - $crop_w;
                        $crop_y = 0;
                        break;
                    case 'west':
                        $crop_x = 0;
                        $crop_y = intval(($src_height - $crop_h) / 2);
                        break;
                    case 'center':
                        $crop_x = intval(($src_width - $crop_w) / 2);
                        $crop_y = intval(($src_height - $crop_h) / 2);
                        break;
                    case 'east':
                        $crop_x = $src_width - $crop_w;
                        $crop_y = intval(($src_height - $crop_h) / 2);
                        break;
                    case 'south_west':
                        $crop_x = 0;
                        $crop_y = $src_height - $crop_h;
                        break;
                    case 'south':
                        $crop_x = intval(($src_width - $crop_w) / 2);
                        $crop_y = $src_height - $crop_h;
                        break;
                    case 'south_east':
                        $crop_x = $src_width - $crop_w;
                        $crop_y = $src_height - $crop_h;
                        break;
                    default:
                        $crop_x = intval(($src_width - $crop_w) / 2);
                        $crop_y = intval(($src_height - $crop_h) / 2);
                }
                $image = $this->image;
                $canvas = new Imagick();
                if ($this->type == 'gif') {
                    $images = $image->coalesceImages();
                    foreach ($images as $frame) {
                        $img = new Imagick();
                        $img->readImageBlob($frame);
                        $img->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
                        $img->thumbnailImage($width, $height, true);
                        $canvas->addImage($img);
                        $canvas->setImageDelay($img->getImageDelay());
                        $canvas->setImagePage($width, $height, 0, 0);
                    }
                } else {
                    $image->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
                    $image->thumbnailImage($width, $height, true);
                    $canvas->addImage($image);
                    $canvas->setImagePage($width, $height, 0, 0);
                }
                $image->destroy();
                $this->image = $canvas;
        }
    }

// 添加水印圖片 
    public function add_watermark($path, $x = 0, $y = 0) {
        $watermark = new Imagick($path);
        $draw = new ImagickDraw();
        $draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark);
        if ($this->type == 'gif') {
            $image = $this->image;
            $canvas = new Imagick();
            $images = $image->coalesceImages();
            foreach ($image as $frame) {
                $img = new Imagick();
                $img->readImageBlob($frame);
                $img->drawImage($draw);
                $canvas->addImage($img);
                $canvas->setImageDelay($img->getImageDelay());
            }
            $image->destroy();
            $this->image = $canvas;
        } else {
            $this->image->drawImage($draw);
        }
    }

// 添加水印文字 
    public function add_text($text, $x = 0, $y = 0, $angle = 0, $style = array()) {
        $draw = new ImagickDraw();
        if (isset($style['font']))
            $draw->setFont($style['font']);
        if (isset($style['font_size']))
            $draw->setFontSize($style['font_size']);
        if (isset($style['fill_color']))
            $draw->setFillColor($style['fill_color']);
        if (isset($style['under_color']))
            $draw->setTextUnderColor($style['under_color']);
        if ($this->type == 'gif') {
            foreach ($this->image as $frame) {
                $frame->annotateImage($draw, $x, $y, $angle, $text);
            }
        } else {
            $this->image->annotateImage($draw, $x, $y, $angle, $text);
        }
    }

// 保存到指定路徑 
    public function save_to($path) {
        if ($this->type == 'gif') {
            $this->image->writeImages($path, true);
        } else {
            $this->image->writeImage($path);
        }
    }

// 輸出圖像 
    public function output($header = true) {
        if ($header)
            header('Content-type: ' . $this->type);
        echo $this->image->getImagesBlob();
    }

    public function get_width() {
        $size = $this->image->getImagePage();
        return $size['width'];
    }

    public function get_height() {
        $size = $this->image->getImagePage();
        return $size['height'];
    }

// 設置圖像類型， 默認與源類型一致 
    public function set_type($type = 'png') {
        $this->type = $type;
        $this->image->setImageFormat($type);
    }

// 獲取源圖像類型 
    public function get_type() {
        return $this->type;
    }

// 當前對象是否爲圖片 
    public function is_image() {
        if ($this->image)
            return true;
        else
            return false;
    }

    public function thumbnail($width = 100, $height = 100, $fit = true) {
        $this->image->thumbnailImage($width, $height, $fit);
    }

// 生成縮略圖 $fit爲真時將保持比例並在安全框 $width X $height 內生成縮略圖片 
    /*
      添加一個邊框
      $width: 左右邊框寬度
      $height: 上下邊框寬度
      $color: 顏色: RGB 顏色 'rgb(255,0,0)' 或 16進制顏色 '#FF0000' 或顏色單詞 'white'/'red'...
     */

    public function border($width, $height, $color = 'rgb(220, 220, 220)') {
        $color = new ImagickPixel();
        $color->setColor($color);
        $this->image->borderImage($color, $width, $height);
    }

    public function blur($radius, $sigma) {
        $this->image->blurImage($radius, $sigma);
    }

// 模糊 

    public function gaussian_blur($radius, $sigma) {
        $this->image->gaussianBlurImage($radius, $sigma);
    }

// 高斯模糊 

    public function motion_blur($radius, $sigma, $angle) {
        $this->image->motionBlurImage($radius, $sigma, $angle);
    }

// 運動模糊 

    public function radial_blur($radius) {
        $this->image->radialBlurImage($radius);
    }

// 徑向模糊 

    public function add_noise($type = null) {
        $this->image->addNoiseImage($type == null ? imagick::NOISE_IMPULSE : $type);
    }

// 添加噪點 

    public function level($black_point, $gamma, $white_point) {
        $this->image->levelImage($black_point, $gamma, $white_point);
    }

// 調整色階 

    public function modulate($brightness, $saturation, $hue) {
        $this->image->modulateImage($brightness, $saturation, $hue);
    }

// 調整亮度、飽和度、色調 

    public function charcoal($radius, $sigma) {
        $this->image->charcoalImage($radius, $sigma);
    }

// 素描 

    public function oil_paint($radius) {
        $this->image->oilPaintImage($radius);
    }

// 油畫效果 

    public function flop() {
        $this->image->flopImage();
    }

// 水平翻轉 

    public function flip() {
        $this->image->flipImage();
    }

// 垂直翻轉 
}

$image = new lib_image_imagick();
$image->open('D:\wamp64\www\ceshiphp\img\977.gif');
$image->resize_to(1000, 1000, 'scale_fill');
$image->add_text('1024i.com', 10, 20);
$image->add_watermark('D:\wamp64\www\ceshiphp\img\166.gif', 10, 50);
$image->save_to('D:\wamp64\www\ceshiphp\img\x.gif');