Image::distort() - Code Metrics - Inspection of "update for 2.0" - vicens/captcha - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 47fbf0...a2ba4c )

by Vicens

created 2017-04-06 14:35 UTC

Image::distort() B

↳ Parent: Image

Complexity

Conditions	5
Paths	6

Size

Total Lines	35
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	35
rs	8.439
c	0
b	0
f	0
cc	5
eloc	24
nc	6
nop	4

<?php
/**
 * @desc 图片类
 * @author vicens<[email protected]>
 */

namespace Vicens\Captcha;

use Symfony\Component\HttpFoundation\Response;


/**
 * Class Builder
 * @method width ($width)
 * @method height ($height)
 * @method textColor ($color)
 * @method backgroundColor ($color)
 * @method maxFrontLines ($maxFrontLines)
 * @method maxBehindLines ($maxBehindLines)
 * @method distortion ($distortion)
 * @method maxAngle ($maxAngle)
 * @method maxOffset ($maxOffset)
 * @method quality ($quality)
 * @package Vicens\Captcha
 */
class Image
{

    /**
     * 已生成的图片
     * @var resource
     */
    protected $image;

    /**
     * 验证码
     * @var string
     */
    protected $code;

    /**
     * 验证码设置
     * @var array
     */
    protected $config = array(
        /**
         * 默认验证码宽度
         * @var int
         */
        'width' => 150,
        /**
         * 默认验证码高度
         * @var int
         */
        'height' => 40,
        /**
         * 指定文字颜色
         * @var string
         */
        'textColor' => null,
        /**
         * 文字字体文件
         * @var string
         */
        'textFont' => null,
        /**
         * 指定图片背景色
         * @var string
         */
        'backgroundColor' => null,
        /**
         * 开启失真模式
         * @var bool
         */
        'distortion' => true,
        /**
         * 最大前景线条数
         * @var int
         */
        'maxFrontLines' => null,
        /**
         * 最大背景线条数
         * @val int
         */
        'maxBehindLines' => null,
        /**
         * 文字最大角度
         * @var int
         */
        'maxAngle' => 8,
        /**
         * 文字最大偏移量
         * @var int
         */
        'maxOffset' => 5,
        /**
         * 图片质量
         * @var int
         */
        'quality' => 90
    );


    public function __construct($code, array $config = array())
    {
        $this->code = $code;

        $this->setConfig($config);
    }

    /**
     * 设置验证码配置
     * @param $config
     * @param null $value
     * @return $this
     */
    public function setConfig($config, $value = null)
    {
        if (!is_array($config)) {
            $config = [$config => $value];
        }

        foreach ($config as $key => $value) {

            if (array_key_exists($key, $this->config)) {
                $this->config[$key] = $value;
            }
        }
        return $this;
    }

    /**
     * 获取配置
     * @param  $key
     * @return array|string|number
     */
    public function getConfig($key)
    {
        if ($key) {
            return $this->config[$key];
        }
        return $this->config;
    }

    /**
     * 获取图片
     * @return resource
     */
    public function getImage()
    {
        if (!$this->image) {

            $this->reset();
        }

        return $this->image;
    }

    /**
     * 重置图片
     * @return $this
     */
    public function reset()
    {

        $this->image = $this->build($this->code);

        return $this;
    }

    /**
     * 获取 base64的数据,用做image标签的src
     * @return string
     */
    public function getDataUrl()
    {
        return 'data:image/jpeg;base64,' . base64_encode($this->getContent());
    }

    /**
     * 输出为html
     * @param int $width
     * @param int $height
     * @return string
     */
    public function html($width = null, $height = null)
    {
        $html = '<img src="' . $this->getDataUrl() . '"" alt="captcha"';
        if (is_null($width)) {
            $html .= ' width="' . $width . '"';
        }
        if (is_null($height)) {
            $html .= ' height="' . $height . '"';
        }
        $html .= '>';
        return $html;
    }

    /**
     * 返回Response响应
     * @return Response
     */
    public function response()
    {

        return Response::create($this->getContent(), 200, array('Content-type' => 'image/jpeg'));

    }


    /**
     * 获取图片资源
     * @return mixed
     */
    public function getContext()
    {
        return $this->getImage();
    }

    /**
     * 保存为图片
     * @param $filename
     * @return $this
     */
    public function save($filename)
    {
        $this->output($filename);

        return $this;
    }

    /**
     * 直接输出
     * @param null $filename
     * @return $this
     */
    public function output($filename = null)
    {
        imagejpeg($this->getContext(), $filename, $this->getConfig('quality'));

        return $this;
    }

    /**
     * 获取输出内容
     * @return string
     */
    public function getContent()
    {
        ob_start();
        $this->output();
        return ob_get_clean();
    }

    /**
     * 创建验证码图片
     * @param $code
     * @return resource
     */
    protected function build($code)
    {

        // 图片宽
        $width = $this->getConfig('width');
        // 图片高
        $height = $this->getConfig('height');
        // 背景颜色
        $backgroundColor = $this->getConfig('backgroundColor');


        //随机取一个字体
        $font = $this->getTextFont();

        //根据宽高创建一个背景画布
        $image = imagecreatetruecolor($width, $height);

        if ($backgroundColor == null) {
            $backgroundColor = imagecolorallocate($image, mt_rand(200, 255), mt_rand(200, 255), mt_rand(200, 255));
        } else {
            $color = $backgroundColor;
            $backgroundColor = imagecolorallocate($image, $color[0], $color[1], $color[2]);
        }
        //填充背景色
        imagefill($image, 0, 0, $backgroundColor);

        //绘制背景干扰线
        $this->drawLines($image, $this->getConfig('maxBehindLines'));

        //写入验证码文字
        $color = $this->renderText($image, $code, $font);

        //绘制前景干扰线
        $this->drawLines($image, $this->getConfig('maxFrontLines'), $color);


        if ($this->getConfig('distortion')) {
            //创建失真
            $image = $this->distort($image, $width, $height, $backgroundColor);
        }

        //如果不指定字体颜色和背景颜色,则使用图像过滤器修饰
        if (function_exists('imagefilter') && is_null($backgroundColor) && is_null($this->getConfig('textColor'))) {
            //颜色翻转 - 1/2几率
            if (mt_rand(0, 1) == 0) {
                imagefilter($image, IMG_FILTER_NEGATE);
            }
            //用边缘检测来突出图像的边缘 - 1/11几率
            if (mt_rand(0, 10) == 0) {
                imagefilter($image, IMG_FILTER_EDGEDETECT);
            }
            //改变图像的对比度
            imagefilter($image, IMG_FILTER_CONTRAST, mt_rand(-50, 10));

            if (mt_rand(0, 5) == 0) {
                //用高斯算法和指定颜色模糊图像
                imagefilter($image, IMG_FILTER_COLORIZE, mt_rand(-80, 50), mt_rand(-80, 50), mt_rand(-80, 50));
            }
        }
        return $image;
    }

    /**
     * 获取一个字体
     * @return string
     */
    protected function getTextFont()
    {
        //指定字体
        if ($this->config['textFont'] && file_exists($this->config['textFont'])) {
            return $this->config['textFont'];
        }
        //随机字体
        return __DIR__ . '/../fonts/' . mt_rand(0, 5) . '.ttf';
    }

    /**
     * 写入验证码到图片中
     * @param $image
     * @param $phrase
     * @param $font
     * @return int
     */
    protected function renderText($image, $phrase, $font)
    {
        $length = strlen($phrase);
        if ($length === 0) {
            return imagecolorallocate($image, 0, 0, 0);
        }

        // 计算文字尺寸
        $size = $this->config['width'] / $length - mt_rand(0, 3) - 1;
        $box = imagettfbbox($size, 0, $font, $phrase);
        $textWidth = $box[2] - $box[0];
        $textHeight = $box[1] - $box[7];
        $x = ($this->config['width'] - $textWidth) / 2;
        $y = ($this->config['height'] - $textHeight) / 2 + $size;

        if (!count($this->config['textColor'])) {
            $textColor = array(mt_rand(0, 150), mt_rand(0, 150), mt_rand(0, 150));
        } else {
            $textColor = $this->config['textColor'];
        }
        $color = imagecolorallocate($image, $textColor[0], $textColor[1], $textColor[2]);

        // 循环写入字符,随机角度
        for ($i = 0; $i < $length; $i++) {
            $box = imagettfbbox($size, 0, $font, $phrase[$i]);
            $w = $box[2] - $box[0];
            $angle = mt_rand(-$this->config['maxAngle'], $this->config['maxAngle']);
            $offset = mt_rand(-$this->config['maxOffset'], $this->config['maxOffset']);
            imagettftext($image, $size, $angle, $x, $y + $offset, $color, $font, $phrase[$i]);
            $x += $w;
        }

        return $color;
    }

    /**
     * 画线
     * @param $image
     * @param $width
     * @param $height
     * @param null $color
     */
    protected function renderLine($image, $width, $height, $color = null)
    {
        if ($color === null) {
            $color = imagecolorallocate($image, mt_rand(100, 255), mt_rand(100, 255), mt_rand(100, 255));
        }

        if (mt_rand(0, 1)) { // 横向
            $Xa = mt_rand(0, $width / 2);
            $Ya = mt_rand(0, $height);
            $Xb = mt_rand($width / 2, $width);
            $Yb = mt_rand(0, $height);
        } else { // 纵向
            $Xa = mt_rand(0, $width);
            $Ya = mt_rand(0, $height / 2);
            $Xb = mt_rand(0, $width);
            $Yb = mt_rand($height / 2, $height);
        }
        imagesetthickness($image, mt_rand(1, 3));
        imageline($image, $Xa, $Ya, $Xb, $Yb, $color);
    }

    /**
     * 画线
     * @param $image
     * @param $max
     * @param $color
     */
    protected function drawLines($image, $max, $color = null)
    {
        $square = $this->config['width'] * $this->config['height'];
        $effects = mt_rand($square / 3000, $square / 2000);

        // 计算线条数
        if ($max != null && $max > 0) {
            $effects = min($max, $effects);
        }

        if ($max !== 0) {
            for ($e = 0; $e < $effects; $e++) {

                if ($color) {
                    $this->renderLine($image, $this->config['width'], $this->config['height'], $color);
                } else {
                    $this->renderLine($image, $this->config['width'], $this->config['height']);
                }

            }
        }
    }

    /**
     * 创建失真
     * @param $image
     * @param $width
     * @param $height
     * @param $bg
     * @return resource
     */
    protected function distort($image, $width, $height, $bg)
    {
        $contents = imagecreatetruecolor($width, $height);
        $X = mt_rand(0, $width);
        $Y = mt_rand(0, $height);
        $phase = mt_rand(0, 10);
        $scale = 1.1 + mt_rand(0, 10000) / 30000;
        for ($x = 0; $x < $width; $x++) {
            for ($y = 0; $y < $height; $y++) {
                $Vx = $x - $X;
                $Vy = $y - $Y;
                $Vn = sqrt($Vx * $Vx + $Vy * $Vy);

                if ($Vn != 0) {
                    $Vn2 = $Vn + 4 * sin($Vn / 30);
                    $nX = $X + ($Vx * $Vn2 / $Vn);
                    $nY = $Y + ($Vy * $Vn2 / $Vn);
                } else {
                    $nX = $X;
                    $nY = $Y;
                }
                $nY = $nY + $scale * sin($phase + $nX * 0.2);

                $p = $this->getColor($image, round($nX), round($nY), $bg);

                if ($p == 0) {
                    $p = $bg;
                }

                imagesetpixel($contents, $x, $y, $p);
            }
        }

        return $contents;
    }

    /**
     * 获取颜色
     * @param $image
     * @param $x
     * @param $y
     * @param $background
     * @return int
     */
    protected function getColor($image, $x, $y, $background)
    {
        $L = imagesx($image);
        $H = imagesy($image);
        if ($x < 0 || $x >= $L || $y < 0 || $y >= $H) {
            return $background;
        }

        return imagecolorat($image, $x, $y);
    }

    /**
     * @param $name
     * @param $arguments
     * @return $this
     */
    public function __call($name, $arguments)
    {
        if (array_key_exists($name, $this->config)) {
            $this->config[$name] = $arguments[0];
        }

        return $this;
    }

}

1		<?php
2		/**
3		* @desc 图片类
4		* @author vicens<[email protected]>
5		*/
6
7		namespace Vicens\Captcha;
8
9		use Symfony\Component\HttpFoundation\Response;
10
11
12		/**
13		* Class Builder
14		* @method width ($width)
15		* @method height ($height)
16		* @method textColor ($color)
17		* @method backgroundColor ($color)
18		* @method maxFrontLines ($maxFrontLines)
19		* @method maxBehindLines ($maxBehindLines)
20		* @method distortion ($distortion)
21		* @method maxAngle ($maxAngle)
22		* @method maxOffset ($maxOffset)
23		* @method quality ($quality)
24		* @package Vicens\Captcha
25		*/
26		class Image
27		{
28
29		/**
30		* 已生成的图片
31		* @var resource
32		*/
33		protected $image;
34
35		/**
36		* 验证码
37		* @var string
38		*/
39		protected $code;
40
41		/**
42		* 验证码设置
43		* @var array
44		*/
45		protected $config = array(
46		/**
47		* 默认验证码宽度
48		* @var int
49		*/
50		'width' => 150,
51		/**
52		* 默认验证码高度
53		* @var int
54		*/
55		'height' => 40,
56		/**
57		* 指定文字颜色
58		* @var string
59		*/
60		'textColor' => null,
61		/**
62		* 文字字体文件
63		* @var string
64		*/
65		'textFont' => null,
66		/**
67		* 指定图片背景色
68		* @var string
69		*/
70		'backgroundColor' => null,
71		/**
72		* 开启失真模式
73		* @var bool
74		*/
75		'distortion' => true,
76		/**
77		* 最大前景线条数
78		* @var int
79		*/
80		'maxFrontLines' => null,
81		/**
82		* 最大背景线条数
83		* @val int
84		*/
85		'maxBehindLines' => null,
86		/**
87		* 文字最大角度
88		* @var int
89		*/
90		'maxAngle' => 8,
91		/**
92		* 文字最大偏移量
93		* @var int
94		*/
95		'maxOffset' => 5,
96		/**
97		* 图片质量
98		* @var int
99		*/
100		'quality' => 90
101		);
102
103
104		public function __construct($code, array $config = array())
105		{
106		$this->code = $code;
107
108		$this->setConfig($config);
109		}
110
111		/**
112		* 设置验证码配置
113		* @param $config
114		* @param null $value
115		* @return $this
116		*/
117		public function setConfig($config, $value = null)
118		{
119		if (!is_array($config)) {
120		$config = [$config => $value];
121		}
122
123	View Code Duplication	foreach ($config as $key => $value) {
		0 ignored issues – show Duplication introduced 2017-04-06 14:42 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
124		if (array_key_exists($key, $this->config)) {
125		$this->config[$key] = $value;
126		}
127		}
128		return $this;
129		}
130
131		/**
132		* 获取配置
133		* @param $key
134		* @return array\|string\|number
135		*/
136		public function getConfig($key)
137		{
138		if ($key) {
139		return $this->config[$key];
140		}
141		return $this->config;
142		}
143
144		/**
145		* 获取图片
146		* @return resource
147		*/
148		public function getImage()
149		{
150		if (!$this->image) {
151
152		$this->reset();
153		}
154
155		return $this->image;
156		}
157
158		/**
159		* 重置图片
160		* @return $this
161		*/
162		public function reset()
163		{
164
165		$this->image = $this->build($this->code);
166
167		return $this;
168		}
169
170		/**
171		* 获取 base64的数据,用做image标签的src
172		* @return string
173		*/
174		public function getDataUrl()
175		{
176		return 'data:image/jpeg;base64,' . base64_encode($this->getContent());
177		}
178
179		/**
180		* 输出为html
181		* @param int $width
182		* @param int $height
183		* @return string
184		*/
185		public function html($width = null, $height = null)
186		{
187		$html = '<img src="' . $this->getDataUrl() . '"" alt="captcha"';
188		if (is_null($width)) {
189		$html .= ' width="' . $width . '"';
190		}
191		if (is_null($height)) {
192		$html .= ' height="' . $height . '"';
193		}
194		$html .= '>';
195		return $html;
196		}
197
198		/**
199		* 返回Response响应
200		* @return Response
201		*/
202		public function response()
203		{
204
205		return Response::create($this->getContent(), 200, array('Content-type' => 'image/jpeg'));
206
207		}
208
209
210		/**
211		* 获取图片资源
212		* @return mixed
213		*/
214		public function getContext()
215		{
216		return $this->getImage();
217		}
218
219		/**
220		* 保存为图片
221		* @param $filename
222		* @return $this
223		*/
224		public function save($filename)
225		{
226		$this->output($filename);
227
228		return $this;
229		}
230
231		/**
232		* 直接输出
233		* @param null $filename
234		* @return $this
235		*/
236		public function output($filename = null)
237		{
238		imagejpeg($this->getContext(), $filename, $this->getConfig('quality'));
239
240		return $this;
241		}
242
243		/**
244		* 获取输出内容
245		* @return string
246		*/
247		public function getContent()
248		{
249		ob_start();
250		$this->output();
251		return ob_get_clean();
252		}
253
254		/**
255		* 创建验证码图片
256		* @param $code
257		* @return resource
258		*/
259		protected function build($code)
260		{
261
262		// 图片宽
263		$width = $this->getConfig('width');
264		// 图片高
265		$height = $this->getConfig('height');
266		// 背景颜色
267		$backgroundColor = $this->getConfig('backgroundColor');
268
269
270		//随机取一个字体
271		$font = $this->getTextFont();
272
273		//根据宽高创建一个背景画布
274		$image = imagecreatetruecolor($width, $height);
275
276		if ($backgroundColor == null) {
277		$backgroundColor = imagecolorallocate($image, mt_rand(200, 255), mt_rand(200, 255), mt_rand(200, 255));
278		} else {
279		$color = $backgroundColor;
280		$backgroundColor = imagecolorallocate($image, $color[0], $color[1], $color[2]);
281		}
282		//填充背景色
283		imagefill($image, 0, 0, $backgroundColor);
284
285		//绘制背景干扰线
286		$this->drawLines($image, $this->getConfig('maxBehindLines'));
287
288		//写入验证码文字
289		$color = $this->renderText($image, $code, $font);
290
291		//绘制前景干扰线
292		$this->drawLines($image, $this->getConfig('maxFrontLines'), $color);
293
294
295		if ($this->getConfig('distortion')) {
296		//创建失真
297		$image = $this->distort($image, $width, $height, $backgroundColor);
298		}
299
300		//如果不指定字体颜色和背景颜色,则使用图像过滤器修饰
301		if (function_exists('imagefilter') && is_null($backgroundColor) && is_null($this->getConfig('textColor'))) {
302		//颜色翻转 - 1/2几率
303		if (mt_rand(0, 1) == 0) {
304		imagefilter($image, IMG_FILTER_NEGATE);
305		}
306		//用边缘检测来突出图像的边缘 - 1/11几率
307		if (mt_rand(0, 10) == 0) {
308		imagefilter($image, IMG_FILTER_EDGEDETECT);
309		}
310		//改变图像的对比度
311		imagefilter($image, IMG_FILTER_CONTRAST, mt_rand(-50, 10));
312
313		if (mt_rand(0, 5) == 0) {
314		//用高斯算法和指定颜色模糊图像
315		imagefilter($image, IMG_FILTER_COLORIZE, mt_rand(-80, 50), mt_rand(-80, 50), mt_rand(-80, 50));
316		}
317		}
318		return $image;
319		}
320
321		/**
322		* 获取一个字体
323		* @return string
324		*/
325		protected function getTextFont()
326		{
327		//指定字体
328		if ($this->config['textFont'] && file_exists($this->config['textFont'])) {
329		return $this->config['textFont'];
330		}
331		//随机字体
332		return __DIR__ . '/../fonts/' . mt_rand(0, 5) . '.ttf';
333		}
334
335		/**
336		* 写入验证码到图片中
337		* @param $image
338		* @param $phrase
339		* @param $font
340		* @return int
341		*/
342		protected function renderText($image, $phrase, $font)
343		{
344		$length = strlen($phrase);
345		if ($length === 0) {
346		return imagecolorallocate($image, 0, 0, 0);
347		}
348
349		// 计算文字尺寸
350		$size = $this->config['width'] / $length - mt_rand(0, 3) - 1;
351		$box = imagettfbbox($size, 0, $font, $phrase);
352		$textWidth = $box[2] - $box[0];
353		$textHeight = $box[1] - $box[7];
354		$x = ($this->config['width'] - $textWidth) / 2;
355		$y = ($this->config['height'] - $textHeight) / 2 + $size;
356
357		if (!count($this->config['textColor'])) {
358		$textColor = array(mt_rand(0, 150), mt_rand(0, 150), mt_rand(0, 150));
359		} else {
360		$textColor = $this->config['textColor'];
361		}
362		$color = imagecolorallocate($image, $textColor[0], $textColor[1], $textColor[2]);
363
364		// 循环写入字符,随机角度
365		for ($i = 0; $i < $length; $i++) {
366		$box = imagettfbbox($size, 0, $font, $phrase[$i]);
367		$w = $box[2] - $box[0];
368		$angle = mt_rand(-$this->config['maxAngle'], $this->config['maxAngle']);
369		$offset = mt_rand(-$this->config['maxOffset'], $this->config['maxOffset']);
370		imagettftext($image, $size, $angle, $x, $y + $offset, $color, $font, $phrase[$i]);
371		$x += $w;
372		}
373
374		return $color;
375		}
376
377		/**
378		* 画线
379		* @param $image
380		* @param $width
381		* @param $height
382		* @param null $color
383		*/
384		protected function renderLine($image, $width, $height, $color = null)
385		{
386		if ($color === null) {
387		$color = imagecolorallocate($image, mt_rand(100, 255), mt_rand(100, 255), mt_rand(100, 255));
388		}
389
390		if (mt_rand(0, 1)) { // 横向
391		$Xa = mt_rand(0, $width / 2);
392		$Ya = mt_rand(0, $height);
393		$Xb = mt_rand($width / 2, $width);
394		$Yb = mt_rand(0, $height);
395		} else { // 纵向
396		$Xa = mt_rand(0, $width);
397		$Ya = mt_rand(0, $height / 2);
398		$Xb = mt_rand(0, $width);
399		$Yb = mt_rand($height / 2, $height);
400		}
401		imagesetthickness($image, mt_rand(1, 3));
402		imageline($image, $Xa, $Ya, $Xb, $Yb, $color);
403		}
404
405		/**
406		* 画线
407		* @param $image
408		* @param $max
409		* @param $color
410		*/
411		protected function drawLines($image, $max, $color = null)
412		{
413		$square = $this->config['width'] * $this->config['height'];
414		$effects = mt_rand($square / 3000, $square / 2000);
415
416		// 计算线条数
417		if ($max != null && $max > 0) {
418		$effects = min($max, $effects);
419		}
420
421		if ($max !== 0) {
422		for ($e = 0; $e < $effects; $e++) {
423
424		if ($color) {
425		$this->renderLine($image, $this->config['width'], $this->config['height'], $color);
426		} else {
427		$this->renderLine($image, $this->config['width'], $this->config['height']);
428		}
429
430		}
431		}
432		}
433
434		/**
435		* 创建失真
436		* @param $image
437		* @param $width
438		* @param $height
439		* @param $bg
440		* @return resource
441		*/
442		protected function distort($image, $width, $height, $bg)
443		{
444		$contents = imagecreatetruecolor($width, $height);
445		$X = mt_rand(0, $width);
446		$Y = mt_rand(0, $height);
447		$phase = mt_rand(0, 10);
448		$scale = 1.1 + mt_rand(0, 10000) / 30000;
449		for ($x = 0; $x < $width; $x++) {
450		for ($y = 0; $y < $height; $y++) {
451		$Vx = $x - $X;
452		$Vy = $y - $Y;
453		$Vn = sqrt($Vx * $Vx + $Vy * $Vy);
454
455		if ($Vn != 0) {
456		$Vn2 = $Vn + 4 * sin($Vn / 30);
457		$nX = $X + ($Vx * $Vn2 / $Vn);
458		$nY = $Y + ($Vy * $Vn2 / $Vn);
459		} else {
460		$nX = $X;
461		$nY = $Y;
462		}
463		$nY = $nY + $scale * sin($phase + $nX * 0.2);
464
465		$p = $this->getColor($image, round($nX), round($nY), $bg);
466
467		if ($p == 0) {
468		$p = $bg;
469		}
470
471		imagesetpixel($contents, $x, $y, $p);
472		}
473		}
474
475		return $contents;
476		}
477
478		/**
479		* 获取颜色
480		* @param $image
481		* @param $x
482		* @param $y
483		* @param $background
484		* @return int
485		*/
486		protected function getColor($image, $x, $y, $background)
487		{
488		$L = imagesx($image);
489		$H = imagesy($image);
490		if ($x < 0 \|\| $x >= $L \|\| $y < 0 \|\| $y >= $H) {
491		return $background;
492		}
493
494		return imagecolorat($image, $x, $y);
495		}
496
497		/**
498		* @param $name
499		* @param $arguments
500		* @return $this
501		*/
502		public function __call($name, $arguments)
503		{
504		if (array_key_exists($name, $this->config)) {
505		$this->config[$name] = $arguments[0];
506		}
507
508		return $this;
509		}
510
511		}

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