tp图像处理

[TOC]

表单：

<form action="{:url('pic')}" method="post" class="form" enctype="multipart/form-data">
    选择文件：<input type="file" class="file" name="img" ><br/>
    <select name="type">
        <option value="1" selected>图片裁剪</option>
        <option value="2">生成缩略图</option>
        <option value="3">垂直翻转</option>
        <option value="4">水平翻转</option>
        <option value="5">图片旋转</option>
        <option value="6">添加图片水印</option>
        <option value="7">添加文字水印</option>
    </select>
    <br/>
    <button type="submit" class="btn btn-primary">Submit</button>
</form>

pic方法：

$file = $request->file('img');

if(true !== $this->validate(['file' => $file],['file' => 'require|image'])){
    $this->error('请选择图片文件');
}else{
    //读取图片     获取Image对象
    $img = Image::open($file);
    switch ($request->param('type')){
        case 1:
            $img->crop(300,300,200,100);//裁剪 whxy
            break;
        case 2:
            $img->thumb(300,300,Image::THUMB_CENTER);//缩略图 w h type
            break;
        case 3:
            $img->flip();//垂直翻转
            break;
        case 4:
            $img->flip(Image::FLIP_Y);//水平翻转
            break;
        case 5:
            $img->rotate(30);// 旋转 degreess
            break;
        case 6:
            $img->water(ROOT_PATH . 'logo.png',Image::WATER_NORTHEAST,50);//图片水印 图片路径 option：位置 alpha
            break;
        case 7:
            $img->text('maid',VENDOR_PATH . 'topthink\think-captcha\assets\ttfs\1.ttf',20,'#ffffff');//文字水印 text path size color
            break;
    }
    $saveName = $request->time() . '.png';
    $img->save(ROOT_PATH . 'public/upload/' . $saveName);
    $this->success('图片处理完毕...','./upload/' . $saveName,1);

}