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);
}