<?php
	
	namespace frontend\controllers;
	
	use Yii;
	use yii\web\IdentityInterface;
	use yii\helpers\Url;

// use yii\imagine\Image;
	
	class ImageController extends \yii\web\Controller
	{
		public $enableCsrfValidation = FALSE;//取消对POST数据的csrf令牌验证
		
		public function actionIndex()
		{
			global $_GPC;
			global $_HI;
			global $_FM;
			$_HI['action'] = 'index';
			
			//本方法采用GD库支持
			
			//创建图片
			$height = isset($_HI['post']['h']) ? abs($_HI['post']['h']) : (isset($_HI['get']['h']) ? abs($_HI['get']['h']) : 0);
			$height = !$height ? 300 : $height;
			$width = isset($_HI['post']['w']) ? abs($_HI['post']['w']) : (isset($_HI['get']['w']) ? abs($_HI['get']['w']) : 0);
			$width = !$width ? 300 : $width;
			
			$im = imagecreatetruecolor($width, $height) or die("Cannot Initialize new GD image stream");     //参数为宽度和高度
			// $im=ImageCreateFromJpg("https://public.hiluker.com/vcms/nopic.jpg");   //使用背景图片创建
			
			$bc = isset($_HI['post']['bc']) ? ltrim($_HI['post']['bc']) : (isset($_HI['get']['bc']) ? ltrim($_HI['get']['bc']) : '');
			$bc = !$bc ? 'AFAFAF' : $bc;
			$fc = isset($_HI['post']['fc']) ? ltrim($_HI['post']['fc']) : (isset($_HI['get']['fc']) ? ltrim($_HI['get']['fc']) : '');
			$fc = !$fc ? '333333' : $fc;
			//添加颜色
			$bc = $this->Hex2RGB('#' . $bc);
			$fc = $this->Hex2RGB('#' . $fc);
			
			
			$text_color = imagecolorallocate($im, $fc['r'], $fc['g'], $fc['b']);
			$background_color = imagecolorallocate($im, $bc['r'], $bc['g'], $bc['b']);
			$default_color = imagecolorallocate($im, 5, 5, 5);
			
			//绘制矩形图片
			imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $background_color);  //填充
			// imagefilledrectangle($im , 0, 0, $width-1 , $height-1 , $default_color);  //填充
			// imagerectangle($im , 0, 0, $width-1 , $height-1, $text_color);    //边框
			
			//添加文字
			$text = isset($_HI['post']['text']) ? trim($_HI['post']['text']) : (isset($_HI['get']['text']) ? trim($_HI['get']['text']) : '');
			$text = !($text) ? '' : html_entity_decode($text);
			// imagettftext ( resource $image , float $size , float $angle , int $x , int $y , int $color , string $fontfile , string $text );
			// 图片源；字体尺寸，文字方向，0从左至右，90从一至下；x、y,首字符起点位置，左下角坐标；color颜色索引。使用负的颜色索引值具有关闭防锯齿的效果；fontfile字体文件
			// imagettftext($im,10,0,$width/2,$height/2,$text_color,"/fonts/STHeiti Medium.ttc","☆");   //中心位置标记
			
			$strlen = mb_strlen($text);   //字符数(中文算1个字符)
			//BUG 180430 只输入一个字时，部分情况报错（中，0，1,`）;无字符输入时报错
			if ($strlen == 0) {
				imagettftext($im, 10, 0, $width / 2 - 1, $height / 2 - 1, $default_color, "/fonts/STHeiti Medium.ttc", "☆");   //中心位置标记
			} else {
				//文字方向
				$fd = isset($_HI['post']['fd']) ? intval($_HI['post']['fd']) : (isset($_HI['get']['fd']) ? intval($_HI['get']['fd']) : -1);
				if ($fd == -1) {
					if ($width < $height) {
						$fd = 270;
					} else {
						$fd = 0;
					}
				}
				$dstyle = 1;  //文本框长度以矩形长为限
				// $dstyle=2;  //文本框长度以矩形宽为限
				if ($dstyle == 1) {
					$long = max($width, $height);    //长
					$short = min($width, $height);    //短
					$fd = ($width < $height) ? 270 : $fd;
				} else {
					$long = $width;
					$short = $height;    //短
				}
				
				//设置文字大小及位置、方向等
				$size_l = round($long / $strlen, 2) - 0.01;
				$size_l = intval($long / $strlen);
				$size_s = round($short / 3, 2) - 0.01;
				$size_s = intval($short / 3);
				$size = min($size_l, $size_s);   //每个字的框宽限制
				
				$f_w = imagefontwidth(6);
				$f_h = imagefontheight(6);
				
				$fontsize = intval(($size - $f_w) / 1.2);    //字体大小
				
				$text_w = $f_w;
				if ($strlen > 1) {
					for ($i = 0; $i < $strlen; $i++) {
						$t = mb_substr($text, $i, 1, 'utf-8');
						$len = strlen($t);
						if ($len == 3) {
							$text_w += $fontsize + $f_w;
						} else if ($len == 2) {
							$text_w += $fontsize * 2 / 3;
						} else if ($len == 1) {
							$text_w += $fontsize * 2 / 3;
						}
					}
					$text_w = $text_w - $f_w;
				} else {
					$text_w = $fontsize;
				}
				
				$p_l = $long / 2 - $text_w / 2;
				$p_l = intval($p_l);
				$p_s = $short / 2 + $fontsize / 2;     //字符串底部-y轴高度
				$p_s = intval($p_s);
				
				if ($fd == 90) {
					//90度时，右下角位置
					$x = $p_s - $f_h;
					$y = $p_l + $text_w;
				} else if ($fd == 270) {
					//270度时，左上角位置
					$x = $short / 2 - $fontsize / 2;
					$y = $p_l + $f_w;
				} else {
					//0度时，左下角位置
					$x = ($strlen == 1) ? $p_l - $f_w : $p_l - $fontsize / 2 + 2 * $f_w;
					$y = $p_s - $f_h;
				}
				
				// var_dump('文本:'.$text);var_dump('字数:'.$strlen);var_dump('字框宽度:'.$size);var_dump('字体大小:'.$fontsize);var_dump('字体宽度：'.$f_w);var_dump('字体高度：'.$f_h);var_dump('文本框总宽度:'.$text_w);var_dump('字符X轴位置:'.$x);var_dump('字符Y轴位置:'.$y);var_dump('文字方向:'.$fd);die();
				imagettftext($im, $fontsize, $fd, $x + 1, $y + 1, $default_color, "/fonts/Arial Unicode.ttf", $text);
				imagettftext($im, $fontsize, $fd, $x, $y, $text_color, "/fonts/Arial Unicode.ttf", $text);
			}
			
			//生成图片
			ob_clean();
			// header("Content-type:image/jpeg;");
			// imagejpeg($im,null,100);
			header("Content-type:image/png;");
			imagepng($im);
			//在根目录下生成图片文件
			// imagejpeg($im,"temp2.jpg",100);
			// imagepng($im,"temp2.png");
			//释放内存
			imagedestroy($im);
		}
		
		/**
		 * RGB转 十六进制
		 * @param $rgb RGB颜色的字符串 如：rgb(255,255,255);
		 * @return string 十六进制颜色值 如：#FFFFFF
		 */
		function RGB2Hex($rgb)
		{
			$regexp = "/^rgb\(([0-9]{0,3})\,\s*([0-9]{0,3})\,\s*([0-9]{0,3})\)/";
			$re = preg_match($regexp, $rgb, $match);
			$re = array_shift($match);
			$hexColor = "#";
			$hex = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');
			for ($i = 0; $i < 3; $i++) {
				$r = NULL;
				$c = $match[$i];
				$hexAr = array();
				while ($c > 16) {
					$r = $c % 16;
					$c = ($c / 16) >> 0;
					array_push($hexAr, $hex[$r]);
				}
				array_push($hexAr, $hex[$c]);
				$ret = array_reverse($hexAr);
				$item = implode('', $ret);
				$item = str_pad($item, 2, '0', STR_PAD_LEFT);
				$hexColor .= $item;
			}
			return $hexColor;
		}
		
		/**
		 * 十六进制 转 RGB
		 */
		function Hex2RGB($hexColor)
		{
			$color = str_replace('#', '', $hexColor);
			if (strlen($color) > 3) {
				$rgb = array(
					'r' => hexdec(substr($color, 0, 2)),
					'g' => hexdec(substr($color, 2, 2)),
					'b' => hexdec(substr($color, 4, 2))
				);
			} else {
				$color = $hexColor;
				$r = substr($color, 0, 1) . substr($color, 0, 1);
				$g = substr($color, 1, 1) . substr($color, 1, 1);
				$b = substr($color, 2, 1) . substr($color, 2, 1);
				$rgb = array(
					'r' => hexdec($r),
					'g' => hexdec($g),
					'b' => hexdec($b)
				);
			}
			return $rgb;
		}
		
		
		/**
		 * 生成图片
		 * @param array  参数,包括图片和文字
		 * @param string $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片
		 * @return [type] [description]
		 */
		function createPoster($config = array(), $filename = "")
		{
			//如果要看报什么错，可以先注释调这个header
			if (empty($filename)) header("content-type: image/png");
			$imageDefault = array(
				'left' => 0,
				'top' => 0,
				'right' => 0,
				'bottom' => 0,
				'width' => 100,
				'height' => 100,
				'opacity' => 100
			);
			$textDefault = array(
				'text' => '',
				'left' => 0,
				'top' => 0,
				'fontSize' => 32,       //字号
				'fontColor' => '255,255,255', //字体颜色
				'angle' => 0,
			);
			$background = $config['background'];//海报最底层得背景
			//背景方法
			$backgroundInfo = getimagesize($background);
			$backgroundFun = 'imagecreatefrom' . image_type_to_extension($backgroundInfo[2], FALSE);
			$background = $backgroundFun($background);
			$backgroundWidth = imagesx($background);  //背景宽度
			$backgroundHeight = imagesy($background);  //背景高度
			$imageRes = imageCreatetruecolor($backgroundWidth, $backgroundHeight);
			$color = imagecolorallocate($imageRes, 0, 0, 0);
			imagefill($imageRes, 0, 0, $color);
			// imageColorTransparent($imageRes, $color);  //颜色透明
			imagecopyresampled($imageRes, $background, 0, 0, 0, 0, imagesx($background), imagesy($background), imagesx($background), imagesy($background));
			//处理了图片
			if (!empty($config['image'])) {
				foreach ($config['image'] as $key => $val) {
					$val = array_merge($imageDefault, $val);
					$info = getimagesize($val['url']);
					$function = 'imagecreatefrom' . image_type_to_extension($info[2], FALSE);
					if ($val['stream']) {   //如果传的是字符串图像流
						$info = getimagesizefromstring($val['url']);
						$function = 'imagecreatefromstring';
					}
					$res = $function($val['url']);
					$resWidth = $info[0];
					$resHeight = $info[1];
					//建立画板 ，缩放图片至指定尺寸
					$canvas = imagecreatetruecolor($val['width'], $val['height']);
					imagefill($canvas, 0, 0, $color);
					//关键函数，参数（目标资源，源，目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h）
					imagecopyresampled($canvas, $res, 0, 0, 0, 0, $val['width'], $val['height'], $resWidth, $resHeight);
					$val['left'] = $val['left'] < 0 ? $backgroundWidth - abs($val['left']) - $val['width'] : $val['left'];
					$val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) - $val['height'] : $val['top'];
					//放置图像
					imagecopymerge($imageRes, $canvas, $val['left'], $val['top'], $val['right'], $val['bottom'], $val['width'], $val['height'], $val['opacity']);//左，上，右，下，宽度，高度，透明度
				}
			}
			//处理文字
			if (!empty($config['text'])) {
				foreach ($config['text'] as $key => $val) {
					$val = array_merge($textDefault, $val);
					list($R, $G, $B) = explode(',', $val['fontColor']);
					$fontColor = imagecolorallocate($imageRes, $R, $G, $B);
					$val['left'] = $val['left'] < 0 ? $backgroundWidth - abs($val['left']) : $val['left'];
					$val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) : $val['top'];
					imagettftext($imageRes, $val['fontSize'], $val['angle'], $val['left'], $val['top'], $fontColor, $val['fontPath'], $val['text']);
				}
			}
			//生成图片
			if (!empty($filename)) {
				$res = imagejpeg($imageRes, $filename, 90); //保存到本地
				imagedestroy($imageRes);
				if (!$res) return FALSE;
				return $filename;
			} else {
				imagejpeg($imageRes);     //在浏览器上显示
				imagedestroy($imageRes);
			}
		}
	}