出院后我负责开发的应用马上就要上线了
开发几天遇到这样几个问题，都解决了，以后在遇到类似的问题就不会这么麻烦了
以下是我实际应用中写的几个函数，可以重复利用 ：）
问题一：
图片通过GD库生成会出现文字漂白问题，或者不显示，调试浪费了我半天的时间
合成图片颜色是真问题，困扰我很久最后解决了
原来imagecreate不支持更多的色彩
imagecreatetruecolor解决了这个问题
本函数需要 GD 2.0.1 或更高版本（推荐 2.0.28 及更高版本）。
代码如下
-
/**
-
* @desc 创建结果图片
-
* @param
-
* @return file
-
*/
-
public function create_userimg() {
-
-
$user_name = addslashes($this->input->get('name'));
-
$user_name = urldecode($user_name);
-
$user_score = (int)$this->input->get('score');
-
-
if (preg_match("/^[x7f-xff]+$/", $user_name)) {
-
$user_name_len = mb_strlen($user_name);
-
$user_name_len = ceil($user_name_len/3);
-
$nickleft = 30+60*$user_name_len;
-
}else{
-
$user_name_len = strlen($user_name);
-
-
$nickleft = 120+13*$user_name_len;
-
}
-
-
$font = '.'.PATH_FONT.'/yahei.ttf';
-
$font_kaiti = '.'.PATH_FONT.'/SIMLI.TTF';
-
$size = 25;
-
-
//$bgimg = 'resource/default/images/lohas/result_bg.png';
-
$bgimg = 'resource/default/images/shishang/result_show.png';
-
$nick = 'resource/default/images/shishang/shishang_nick.png';
-
-
$im = @imagecreatetruecolor(506,432) or die("Cannot Initialize new GD image stream");
-
$white = imagecolorallocate( $im, 255, 255, 255 );
-
imagefill( $im, 0, 0, $white );
-
imagecopy($im, $this->Image, 0, 0, 0, 0, 506, 432);
-
-
$bgimg = imagecreatefrompng($bgimg);
-
imagecopy($im,$bgimg,0,0,0,0,506,432);
-
-
$nick = imagecreatefrompng($nick);
-
imagecopy($im,$nick,$nickleft,136,0,0,77,14);
-
-
-
$green=imagecolorallocate($im,68,160,28);
-
$hei=imagecolorallocate($im,0,0,0);
-
$bai=imagecolorallocate($im,255,255,255);
-
-
if (preg_match("/^[x7f-xff]+$/", $user_name)) {
-
imagettftext($im,'25',0,62,150,$hei,$font_kaiti,$user_name);
-
}else{
-
imagettftext($im,'21',0,62,150,$hei,$font,$user_name);
-
}
-
-
imagettftext($im,'12',0,70,209,$green,$font,$text_1);
-
-
imagettftext($im,'11',0,170,238,$green,$font,$text_2);
-
-
imagettftext($im,'12',0,360,210,$green,$font,$score);
-
-
imagettftext($im,'11',0,95,237,$green,$font,$user_vs);
-
-
imagettftext($im,'10',0,330,340,$hei,$font,$date_text);
-
-
-
-
header("Content-type: image/png");
-
imagepng($im);
-
imagedestroy($im);
-
}
问题二：
PHP中文换行问题，因为文字要写在图片里，类似css的自动换行，
php对英文有wordwrap()函数支持换行，但不支持中文,下面函数解决了PHP中文换行问题
代码如下
-
/**
-
* @desc GD库生成图片中文自动换行
-
* 这几个变量分别是 字体大小, 角度, 字体名称, 字符串, 预设宽度
-
* */
-
public function autowrap($fontsize, $angle, $fontface, $string, $width) {
-
$content = "";
-
-
// 将字符串拆分成一个个单字 保存到数组 letter 中
-
for ($i=0;$i<mb_strlen($string);$i++) {
-
$letter[] = mb_substr($string, $i, 1);
-
}
-
-
foreach ($letter as $l) {
-
$teststr = $content."".$l;
-
$testbox = imagettfbbox($fontsize, $angle, $fontface, $teststr);
-
// 判断拼接后的字符串是否超过预设的宽度
-
if (($testbox[2] > $width) && ($content !== "")) {
-
$content .= "n";
-
}
-
$content .= $l;
-
}
-
-
$content = mb_convert_encoding($content, "html-entities","utf-8" );
-
-
return $content;
-
}
|
