php图片文字合成-海报生成
图片合成方法
/** * 生成宣传海报 * @param array 参数,包括图片和文字 * @param string $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片 * @return [type] [description] */ function imgTextMerge($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, 255, 255, 255); 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']; $text = $val['text']; $fontSize = $val['fontSize']; $angle = $val['angle']; $fontPath = $val['fontPath']; $width = $val['width']; $outStyle = $val['outStyle']; $suffix = isset($val['suffix'])?$val['suffix']:''; $text = $this->textWidth($fontSize,$angle,$fontPath,$text,$width,$outStyle,$suffix); imagettftext($imageRes,$val['fontSize'],$val['angle'],$val['left'],$val['top'],$fontColor,$val['fontPath'],$text); } } //生成图片 if(!empty($filename)){ $res = imagejpeg($imageRes,$filename,100); //保存到本地 imagedestroy($imageRes); if(!$res) return false; return $filename; }else{ imagejpeg($imageRes); //在浏览器上显示 imagedestroy($imageRes); } } /** * 文字超出宽度 * @param $fontsize //字体大小 * @param $angle //角度 * @param $fontface //字体名称 * @param $string //字符串 * @param $width //预设宽度 * @param $outStyle //超出宽度操作类型(wrap:换行 hidden:隐藏 replace:替换) * @param $suffix //outStyle值为replace时,替换的内容 * @return string */ function textWidth($fontsize, $angle, $fontface, $string, $width, $outStyle = 'replace', $suffix = '...') { $content = ""; // 将字符串拆分成一个个单字 保存到数组 letter 中 for ($i=0;$i<mb_strlen($string);$i++) { $letter[] = mb_substr($string, $i, 1); } foreach ($letter as $l) { $teststr = $content.$l; $testbox = imagettfbbox($fontsize, $angle, $fontface, $teststr); // 判断拼接后的字符串是否超过预设的宽度 $is_width = false;//是否超出宽度 if (($testbox[2] > $width) && ($content !== "") && $width != 0) { $is_width = true; } if ($outStyle == 'wrap'){//超出换行 if ($is_width) $content .= "\n"; }elseif ($outStyle == 'hidden'){//超出隐藏 if ($is_width) break; }elseif ($outStyle == 'replace'){//超出替换内容 if ($is_width){$content .= $suffix; break;} } $content .= $l; } return $content; }
调用图片合成
public function test(){ $config = array( 'text'=>array( array( 'text'=>'标题', 'left'=>50, 'top'=>700, 'fontPath'=>'/font/siyuan.ttf', //字体文件 'fontSize'=>32, //字号 'fontColor'=>'0,0,0', //字体颜色 'angle'=>0, 'width'=>700,//文字超出宽度换行或隐藏,0不限制 'outStyle'=>'wrap',//超出宽度操作类型(wrap:换行 hidden:隐藏 replace:替换) ), array( 'text'=>'用户名', 'left'=>50, 'top'=>910, 'fontPath'=>'/font/siyuan.ttf', //字体文件 'fontSize'=>28, //字号 'fontColor'=>'76,75,75', //字体颜色 'angle'=>0, 'width'=>450,//文字超出宽度换行或隐藏,0不限制 'outStyle'=>'replace',//超出宽度操作类型(wrap:换行 hidden:隐藏 replace:替换) 'suffix'=>'...',//outStyle值为replace时,替换的内容 ), ), 'image'=>array( array( 'url'=>'/public/logo.png', //图片资源路径 'left'=>50, 'top'=>110, 'right'=>0, 'bottom'=>0, 'width'=>700, 'height'=>490, 'stream'=>0, //图片资源是否是字符串图像流 'opacity'=>100 //不透明度 ), array( 'url'=>'/public/qrcode.png', 'left'=>530, 'top'=>870, 'right'=>0, 'bottom'=>0, 'width'=>220, 'height'=>220, 'stream'=>0, //图片资源是否是字符串图像流 'opacity'=>100 //不透明度 ), ), 'background'=>'/public/bg.png', ); $filename = '/uploads/'.time().'.jpg'; $this->imgTextMerge($config,$filename); }