今天在開發中需要用到開發宣傳海報 今天我發一下大概的方法
方法函數
/**
* 生成宣傳海報
* @param array 參數,包括圖片和文字
* @param string $filename 生成海報文件名,不傳此參數則不生成文件,直接輸出圖片
* @return [type] [description]
*/
function createPoster1($config = array() , $filename = "") {
//如果要看報什么錯，可以先注釋調這個header
//if(empty($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, //字號
'fontColor' => '255,255,255', //字體顏色
'angle' => 0,
);
$background = $config['background']; //海報最底層得背景
//背景方法
$backgroundInfo = getimagesize($background);
$backgroundFun = 'imagecreatefrom' . image_type_to_extension($backgroundInfo[2], false);
$background = $backgroundFun($background);
$backgroundWidth = imagesx($background); //背景寬度
$backgroundHeight = imagesy($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($background));
//處理了圖片
if (!empty($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']) { //如果傳的是字符串圖像流
$info = getimagesizefromstring($val['url']);
$function = 'imagecreatefromstring';
}
$res = $function($val['url']);
$resWidth = $info[0];
$resHeight = $info[1];
//建立畫板 ，縮放圖片至指定尺寸
$canvas = imagecreatetruecolor($val['width'], $val['height']);
imagefill($canvas, 0, 0, $color);
//如果是透明的gif或png做透明處理
$ext = pathinfo($val['url']);
if (array_key_exists('extension',$ext)) {
if ($ext['extension'] == 'gif' || $ext['extension'] == 'png') {
imageColorTransparent($canvas, $color); //顏色透明
}
}
//關鍵函數，參數（目標資源，源，目標資源的開始坐標x,y, 源資源的開始坐標x,y,目標資源的寬高w,h,源資源的寬高w,h）
imagecopyresampled($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小於-1我這做成了計算讓其水平居中
if ($val['left'] < 0) {
$val['left'] = ceil($backgroundWidth - $val['width']) / 2;
}
$val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) - $val['height'] : $val['top'];
//放置圖像
imagecopymerge($imageRes, $canvas, $val['left'], $val['top'], $val['right'], $val['bottom'], $val['width'], $val['height'], $val['opacity']); //左，上，右，下，寬度，高度，透明度
}
}
//處理文字
if (!empty($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小於-1我這做成了計算讓其水平居中
if ($val['left'] < 0) {
$fontBox = imagettfbbox($val['fontSize'], 0, $val['fontPath'], $val['text']); //文字水平居中實質
$val['left'] = ceil(($backgroundWidth - $fontBox[2]) / 2); //計算文字的水平位置
}
$val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) : $val['top'];
imagettftext($imageRes, $val['fontSize'], $val['angle'], $val['left'], $val['top'], $fontColor, $val['fontPath'], $val['text']);
}
}
//生成圖片
if (!empty($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); //在瀏覽器上顯示
imagedestroy($imageRes);
}
}
THINKPHP中使用
//生成海報
public function get_poster(){
$uid = $this->userInfo['uid'];
$qrInfo = QrcodeService::getTemporaryQrcode('spread',$uid);
//獲取用戶信息
$userinfo = WechatUser::where('uid',$uid)->find()->toArray();
//dump($userinfo);die;
//獲取海報信息
$poster = Db::name('system_popover')->where('id',1)->find();
$config = array(
'image'=>array(
array(
'url'=>$qrInfo['url'], //二維碼地址
'is_yuan'=>false, //true圖片圓形處理
'stream'=>0,
'left'=>-1, //小於0為小平居中
'top'=>735,
'right'=>0,
'width'=>250, //圖像寬
'height'=>250, //圖像高
'opacity'=>100 //透明度
),
array(
'url'=>download_remote_pic($userinfo['headimgurl']), //頭像地址
'is_yuan'=>true, //true圖片圓形處理
'stream'=>0,
'left'=>-1, //小於0為小平居中
'top'=>532,
'right'=>0,
'width'=>132, //圖像寬
'height'=>132, //圖像高
'opacity'=>100 //透明度
),
),
'text'=>array(
array(
'text'=>$userinfo['nickname'], //文字內容
'left'=>-1, //小於0為小平居中
'top'=>600,
'fontSize'=>28, //字號
'fontColor'=>'90,90,90', //字體顏色
'angle'=>0,
'fontPath'=>ROOT_PATH.'public/static/font/simsunb.ttf', //字體文件
)
),
'background'=>'http://'.$_SERVER['HTTP_HOST'].$poster['background'], //背景圖
);
$filename = 'public/'.time().'.jpg';
//echo createPoster($config);
//$filename為空是真接瀏覽器顯示圖片
echo createPoster($config,$filename);
}