PHP合成图片，文字居中，图片处理成圆角

public function share(){
        $userName = "小仙女哈";//昵称
        $userAvatar = './avatar.png';//默认头像
    
        //文字内容
        $content[] = "我正在学习PHP图片合成，";//34px
        $content[] = "快来为我加油助威吧！";//26px
        
        ob_clean();
        $types = array(1 => "gif", 2 => "jpeg", 3 => "png");//图片类型
        $bj_path = app()->baseDir . '/Public/test.jpg';//目标大图，背景图
        list($width0, $height0, $type0) = getimagesize($bj_path);//获取图片参数
        $createBgImg = "imagecreatefrom" . $types[$type0];
        $dstImage = $createBgImg($bj_path);
        $dstImage = $this->radiusImg($dstImage, $width0,$height0, 17);//把背景图的四直角处理成圆角
    
        //头像合并
        $avatarPath = '';
        if (!empty($userAvatar) && @fopen($userAvatar, 'r') != false) {
            $avatarPath = $this->roundImg($userAvatar, app()->baseDir . '/Data/Uploads/temp' . date('Y-m-d') . '/');//将头像处理成圆图
    
            list($width2, $height2, $type2) = getimagesize($avatarPath);//获取图片参数
            $createBgImg2 = "imagecreatefrom" . $types[$type2];
            $viceImage = $createBgImg2($avatarPath);//1:读取文件对象
            
            $src_w = imagesx($viceImage);//读取副图文件的宽
            $src_y = imagesy($viceImage);//读取副图文件的高
            
            $dst_x = $dst_y = $width2;//创建新的图片对象--由原图缩放尺寸
            $viceDstImg = imagecreatetruecolor($dst_x, $dst_y);//2:根据尺寸创建画布
            imagealphablending($viceDstImg, false);//混色模式-关闭
            imagesavealpha($viceDstImg, true);//图像时保存完整的alpha 透明度通道信息
            imagecopyresized($viceDstImg, $viceImage, 0, 0, 0, 0, $dst_x, $dst_y, $src_w, $src_y);//原图的copy-实现缩放
            imagecopy($dstImage, $viceDstImg, ($width0-$width2)/2, 192, 0, 0, $dst_x, $dst_y);//头像合并到主图 水平居中
        }
    
        //step1:昵称合并
        $vice_w = $vice_h = 500;//副图的画布大小
        $im = imagecreate($vice_w, $vice_h);//副图创建画布
        $white = imagecolorallocate($im,  255, 255, 255);
        imagecolortransparent($im, $white);  //设置具体某种颜色为透明色
        $black = imagecolorallocate($im, 51, 51, 51);
        
        $nameSize = 20;
        $fontBox = imagettfbbox($nameSize, 0, app()->baseDir . '/msyh.ttf', $userName);//文字水平居中实质
        $name_x = ceil(($width0 - $fontBox[2]) / 2);//水平居中坐标
        $name_y = 192+80+50;//垂直坐标根据图片位置计算 192是图片顶端到头像的距离，80是头像的高度，50是头像和昵称的空白距离
        imagettftext($im, $nameSize, 0, 10, 100, $black, app()->baseDir . '/msyh.ttf', $userName); //字体设置部分linux和windows的路径可能不同
        imagettftext($im, $nameSize, 0, 11, 100, $black, app()->baseDir . '/msyh.ttf', $userName); //字体加粗 向右偏移一个像素
        imagecopymerge($dstImage, $im, $name_x, $name_y, 10, 10, $vice_w, $vice_h, 100);//副图合并到主图
    
        //step2:文字内容合并 同step1            
        foreach ($content as $key => $item) {
            if($key == 0){
                $im1 = imagecreate($vice_w, $vice_h);//副图创建画布
                $white1 = imagecolorallocate($im1, 255, 255, 255);
                imagecolortransparent($im1, $white1);  //设置具体某种颜色为透明色
                $black1 = imagecolorallocate($im1, 51, 51, 51);
                $dstY = 530;
                imagettftext($im1, 20, 0, 10, 100, $black1, app()->baseDir . '/msyh.ttf', $item);
                imagettftext($im1, 20, 0, 11, 100, $black1, app()->baseDir . '/msyh.ttf', $item);
                $fontBox = imagettfbbox(20, 0, app()->baseDir . '/msyh.ttf', $item);//文字水平居中实质
                $dstX = ceil(($width0 - $fontBox[2]) / 2);
                imagecopymerge($dstImage, $im1, $dstX, $dstY, 0, 0, $vice_w, $vice_h, 100);
            }else{
                $im1 = imagecreate($vice_w, $vice_h);//副图创建画布
                $white1 = imagecolorallocate($im1, 255, 255, 255);
                imagecolortransparent($im1, $white1);  //设置具体某种颜色为透明色
                $black1 = imagecolorallocate($im1, 102,102,102);
                $dstY = 565;
                imagettftext($im1, 18, 0, 10, 100, $black1, app()->baseDir . '/msyh.ttf', $item);
                imagettftext($im1, 18, 0, 11, 100, $black1, app()->baseDir . '/msyh.ttf', $item);
                $fontBox = imagettfbbox(18, 0, app()->baseDir . '/msyh.ttf', $item);//文字水平居中实质
                $dstX = ceil(($width0 - $fontBox[2]) / 2);
                imagecopymerge($dstImage, $im1, $dstX, $dstY, 0, 0, $vice_w, $vice_h, 100);
            }
        }
            
        //直接输出到浏览器
        app('response')->header('Content-Type', 'image/png');
        imagepng($dstImage);
    
        // 保存合成图片
        /*
        $dir = app()->baseDir . '/Data/Uploads/temp' . date('Y-m-d');
        if (!file_exists($dir)) {
            mkdir($dir, 0777, true);
        }
    
        $endImgUrl = "{$dir}/".uniqid().".png";//图片保存路径
        $save = "image" . $types[$type0];
        $save($dstImage, $endImgUrl);//保存文件
        */
    
        //删除图片
        !empty($avatarPath) && unlink($avatarPath);
        imagedestroy($dstImage);
        @imagedestroy($viceImage);
        @imagedestroy($viceDstImg);
        imagedestroy($im);
        imagedestroy($im1);
    }
    
    /**
     * 方图转圆形
     * @param string $original_path 图片地址
     * @param string $destFolder 保存的图片路径
     * @return string
     */
    private function roundImg($original_path = '', $destFolder = './')
    {
        //获取参数
        $types = array(1 => "gif", 2 => "jpeg", 3 => "png");//图片类型
        list($width1, $height1, $type1) = getimagesize($original_path);
    
        $createBgImg1 = "imagecreatefrom" . $types[$type1];
        $viceImage = $createBgImg1($original_path);//1:读取文件对象
        
        $w = imagesx($viceImage);//读取副图文件的宽高
        $h = imagesy($viceImage);

        if (!file_exists($destFolder)) {
            mkdir($destFolder, 0777, true);
        }
    
        $dest_path = $destFolder . uniqid() . '.png';
        $src = imagecreatefromstring(file_get_contents($original_path));
        $newpic = imagecreatetruecolor($w, $h);
        imagealphablending($newpic, false);
        $transparent = imagecolorallocatealpha($newpic, 255, 255, 255, 127);
        $r = $w / 2;
        for ($x = 0; $x < $w; $x++) {
            for ($y = 0; $y < $h; $y++) {
                $c = imagecolorat($src, $x, $y);
                $_x = $x - $w / 2;
                $_y = $y - $h / 2;
                if ((($_x * $_x) + ($_y * $_y)) < ($r * $r)) {
                    imagesetpixel($newpic, $x, $y, $c);
                } else {
                    imagesetpixel($newpic, $x, $y, $transparent);
                }
            }
        }

        imagesavealpha($newpic, true);
        imagepng($newpic, $dest_path);
        imagedestroy($newpic);
        imagedestroy($src);
        imagedestroy($viceImage);
        return $dest_path;
    }
    
    /**
     * 将图片四直角处理成圆角
     *
     * @param $src_img 目标图片
     * @param $width 宽
     * @param $height 高
     * @param int $radius 圆角半径
     * @return resource
     */
    private function radiusImg($src_img, $width,$height, $radius = 17) {
        $w  = &$width;
        $h  = &$height;
        $img = imagecreatetruecolor($w, $h);//创建底图
        //这一句一定要有
        imagesavealpha($img, true);//设置是否保存透明图像资源
        
        //拾取一个完全透明的颜色,最后一个参数127为全透明
        $bg = imagecolorallocatealpha($img, 255, 255, 255, 127);
        imagefill($img, 0, 0, $bg);
        
        $r = $radius; //圆角半径
        for ($x = 0; $x < $w; $x++) {
            for ($y = 0; $y < $h; $y++) {
                $rgbColor = imagecolorat($src_img, $x, $y);
                if (($x >= $radius && $x <= ($w - $radius)) || ($y >= $radius && $y <= ($h - $radius))) {
                    //不在四角的范围内,直接画
                    imagesetpixel($img, $x, $y, $rgbColor);
                } else {
                    //在四角的范围内选择画
                    //上左
                    $y_x = $r; //圆心X坐标
                    $y_y = $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                    //上右
                    $y_x = $w - $r; //圆心X坐标
                    $y_y = $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                    //下左
                    $y_x = $r; //圆心X坐标
                    $y_y = $h - $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                    //下右
                    $y_x = $w - $r; //圆心X坐标
                    $y_y = $h - $r; //圆心Y坐标
                    if (((($x - $y_x) * ($x - $y_x) + ($y - $y_y) * ($y - $y_y)) <= ($r * $r))) {
                        imagesetpixel($img, $x, $y, $rgbColor);
                    }
                }
            }
        }
        
        return $img;
    }

 

 

合成前背景图

合成后图片