<?php
namespace app\api\wxapi;

/* $codeImg = new codeImg();
$source       = "./uploads/share.png"; //背景图
$codeurl = "./uploads/pic.png"; //合成图
$n_pic='./uploads/1.png';
$generateImg  = $codeImg->generateImg($n_pic,$source, $codeurl, 80, 95, 590, 850); */

class CodeImg {

		public function generateImgPng($filename='',$source, $codeurl, $pic_position_x=0, $pic_position_y=0, $pic_w=0, $pic_h=0)
		{
			$main   = imagecreatefrompng($source); //imagecreatefromjpeg
			$source_w=imagesx($main);
			$source_h=imagesy($main);
				
			$target = imagecreatetruecolor($source_w, $source_h);
			$white  = imagecolorallocate($target, 255, 255, 255);
			imagefill($target, 0, 0, $white);
			imagecopyresampled($target, $main, 0, 0, 0, 0, $source_w, $source_h, $source_w, $source_h);
		
			$codepic = imagecreatefrompng($codeurl);
			$codepic_w=imagesx($codepic);
			$codepic_h=imagesy($codepic);
				
			$pic_w=$pic_w?$pic_w:$codepic_w;
			$pic_h=$pic_h?$pic_h:$codepic_h;
				
			$position_x=$source_w/2-$codepic_w/2;
			$position_y=$source_h-$codepic_h-$source_h*0.2;
				
			$pic_position_x=$pic_position_x?$pic_position_x:$position_x;
			$pic_position_y=$pic_position_y?$pic_position_y:$position_y;
				
			imagecopyresampled($target, $codepic, $pic_position_x, $pic_position_y, 0, 0, $pic_w, $pic_h,$codepic_w,$codepic_h);
			imagedestroy($codepic);
			//$this->createImg();
				
			@mkdir('./' . dirname($filename));
			imagepng($target, $filename); //imagejpeg
			imagedestroy($main);
			imagedestroy($target);
				
			return $filename;
		}
		
		public function PngToJpeg($source, $codeurl){
			$tmp = imagecreatefrompng($source);
			$w = imagesx($tmp);
			$y = imagesy($tmp);
			$simg = imagecreatetruecolor($w, $y);
			$bg =imagecolorallocate($simg, 255, 255, 255);
			imagefill($simg, 0, 0, $bg);
			imagecopyresized($simg, $tmp, 0, 0, 0, 0,$w, $y, $w, $y);

			imagejpeg($tmp, $codeurl);
			imagedestroy($tmp);
		}
		
		public function generateImgJpg($filename='',$source, $codeurl, $pic_position_x=0, $pic_position_y=0, $pic_w=0, $pic_h=0)
		{
			$main   = imagecreatefromjpeg($source); //imagecreatefromjpeg
			$source_w=imagesx($main);
			$source_h=imagesy($main);
				
			$target = imagecreatetruecolor($source_w, $source_h);
			$white  = imagecolorallocate($target, 255, 255, 255);
			imagefill($target, 0, 0, $white);
			imagecopyresampled($target, $main, 0, 0, 0, 0, $source_w, $source_h, $source_w, $source_h);

			$codepic = imagecreatefromjpeg($codeurl);
			$codepic_w=imagesx($codepic);
			$codepic_h=imagesy($codepic);
				
			$pic_w=$pic_w?$pic_w:$codepic_w;
			$pic_h=$pic_h?$pic_h:$codepic_h;
				
			$position_x=$source_w/2-$codepic_w/2;
			$position_y=$source_h-$codepic_h-$source_h*0.2;
				
			$pic_position_x=$pic_position_x?$pic_position_x:$position_x;
			$pic_position_y=$pic_position_y?$pic_position_y:$position_y;
				
			imagecopyresampled($target, $codepic, $pic_position_x, $pic_position_y, 0, 0, $pic_w, $pic_h,$codepic_w,$codepic_h);
			imagedestroy($codepic);
			//$this->createImg();
				
			@mkdir('./' . dirname($filename));
			imagejpeg($target, $filename); //imagejpeg
			imagedestroy($main);
			imagedestroy($target);
				
			return $filename;
		}
		
}

?>