THINKPHP 生成推广海报图片
今天在开发中需要用到开发宣传海报 今天我发一下大概的方法
方法函数
/**
* 生成宣传海报
* @param array 参数,包括图片和文字
* @param string $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片
* @return [type] [description]
*/
function createPoster1($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");
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, $color);
imagecopyresampled($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);
//如果是透明的gif或png做透明处理
$ext = pathinfo($val['url']);
if (array_key_exists('extension',$ext)) {
if ($ext['extension'] == 'gif' || $ext['extension'] == 'png') {
imageColorTransparent($canvas, $color); //颜色透明
}
}
//关键函数，参数（目标资源，源，目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h）
imagecopyresampled($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'];
//如果left小于-1我这做成了计算让其水平居中
if ($val['left'] < 0) {
$val['left'] = ceil($backgroundWidth - $val['width']) / 2;
}
$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'];
//如果left小于-1我这做成了计算让其水平居中
if ($val['left'] < 0) {
$fontBox = imagettfbbox($val['fontSize'], 0, $val['fontPath'], $val['text']); //文字水平居中实质
$val['left'] = ceil(($backgroundWidth - $fontBox[2]) / 2); //计算文字的水平位置
}
$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 $filename;
} else {
header("Content-type:image/png");
imagejpeg($imageRes); //在浏览器上显示
imagedestroy($imageRes);
}
}
THINKPHP中使用
//生成海报
public function get_poster(){
$uid = $this->userInfo['uid'];
$qrInfo = QrcodeService::getTemporaryQrcode('spread',$uid);
//获取用户信息
$userinfo = WechatUser::where('uid',$uid)->find()->toArray();
//dump($userinfo);die;
//获取海报信息
$poster = Db::name('system_popover')->where('id',1)->find();
$config = array(
'image'=>array(
array(
'url'=>$qrInfo['url'], //二维码地址
'is_yuan'=>false, //true图片圆形处理
'stream'=>0,
'left'=>-1, //小于0为小平居中
'top'=>735,
'right'=>0,
'width'=>250, //图像宽
'height'=>250, //图像高
'opacity'=>100 //透明度
),
array(
'url'=>download_remote_pic($userinfo['headimgurl']), //头像地址
'is_yuan'=>true, //true图片圆形处理
'stream'=>0,
'left'=>-1, //小于0为小平居中
'top'=>532,
'right'=>0,
'width'=>132, //图像宽
'height'=>132, //图像高
'opacity'=>100 //透明度
),
),
'text'=>array(
array(
'text'=>$userinfo['nickname'], //文字内容
'left'=>-1, //小于0为小平居中
'top'=>600,
'fontSize'=>28, //字号
'fontColor'=>'90,90,90', //字体颜色
'angle'=>0,
'fontPath'=>ROOT_PATH.'public/static/font/simsunb.ttf', //字体文件
)
),
'background'=>'http://'.$_SERVER['HTTP_HOST'].$poster['background'], //背景图
);
$filename = 'public/'.time().'.jpg';
//echo createPoster($config);
//$filename为空是真接浏览器显示图片
echo createPoster($config,$filename);
}
