本文实例讲述了PHP实现将几张照片拼接到一起的合成图片功能。分享给大家供大家参考，具体如下：
rush:PHP;">
array(位置=>array(x,y,width,height))
$g_models = array(
1=>array( // 单页总张数
0=>array( // 位置
'x' => 0 + $g_border,'y' => 0 + $g_border,'w' => $g_width - 2*$g_border,'h' => $g_height - 2*$g_border,),3=>array(
0=>array(
'x' => 0 + $g_border,'h' => ($g_height - 3*$g_border)/2,1=>array(
'x' => 0 + $g_border,'y' => 0 + $g_border + ($g_height - 3*$g_border)/2 + $g_border,'w' => ($g_width - 3*$g_border)/2,2=>array(
'x' => 0 + $g_border + ($g_width - 3*$g_border)/2 + $g_border,4=>array(
0=>array(
'x' => 0 + $g_border,'w' => ($g_width-3*$g_border)/2,'h' => ($g_height-3*$g_border)/2,1=>array(
'x' => 0 + $g_border + ($g_width-3*$g_border)/2 + $g_border,2=>array(
'x' => 0 + $g_border,'y' => 0 + $g_border + ($g_height-3*$g_border)/2 + $g_border,3=>array(
'x' => 0 + $g_border + ($g_width-3*$g_border)/2 + $g_border,);
// 排版
$g_tasks = array(
0 => array(0),// 封面封底
1 => array(1),2 => array(2),3 => array(3),4 => array(4,5,6),5 => array(7),6 => array(8),7 => array(9,10,11),8 => array(12),9 => array(13),10 => array(14,15,16),11 => array(17),12 => array(18),13 => array(19,20,21),14 => array(22),15 => array(23),16 => array(24,25,26),17 => array(27,28,29),18 => array(30),19 => array(31),20 => array(32,33,34),21 => array(35),22 => array(36),23 => array(37),24 => array(38,39,40,41),25 => array(42,43,44),26 => array(45),27 => array(46),28 => array(47,48,49),29 => array(50),30 => array(51),);
// 获取文件夹下的所有图片名
$jpgs = array();
$files = scandir($src_path); // 目录下所有文件名
foreach($files as $file){
$path_parts = pathinfo($src_path.'/'.$file);
if($path_parts['extension'] == 'jpg'){
$jpgs[] = $src_path.'/'.$file;
}
}
// 判断图片总数
if(count($jpgs) != 52){
echo '图片总数有误：'.count($jpgs).'/52'.nl2br("\n");
die();
}
// 自然排序
usort($jpgs,"strnatcmp");
foreach($g_tasks as $page=>$photos){
$files = array();
foreach($photos as $r){
$files[] = $jpgs[$r];
}
$image_all = imagemake($files);
$filename = $page.'.jpg';
imagejpeg($image_all,$dst_path.'/'.$filename);
unset($files);
echo $filename.nl2br("\n");
}
echo 'ok'.nl2br("\n");
die();
/**
* 合成图片
* @param array $images 本页图片集合
* @return resource 合成后的图片
*/
function imagemake($files=array()){
global $g_width,$g_height,$g_models;
// 合成后的图片
$image_all = imageCreatetruecolor($g_width,$g_height);
// 为真彩色画布创建白色背景
$color = imagecolorallocate($image_all,255,255);
imagefill($image_all,$color);
// imageColorTransparent($image_all,$color); // 背景透明
//function imagecopyresampled ($dst_image,$src_image,$dst_x,$dst_y,$src_x,$src_y,$dst_w,$dst_h,$src_w,$src_h)
// 排版合成
$type = count($files);
switch($type){
case 2:
break;
case 1:
case 3:
case 4:
// 用于合成的图片集
$images = array();
// 修正图片
for($i=0;$i<$type;$i++){
$images[] = imagecropper($files[$i],$g_models[$type][$i]['w'],$g_models[$type][$i]['h']);
}
// 排版合成
for($i=0;$i<$type;$i++){
imagecopyresampled($image_all,$images[$i],$g_models[$type][$i]['x'],$g_models[$type][$i]['y'],$g_models[$type][$i]['h'],imagesx($images[$i]),imagesy($images[$i]));
}
break;
default:
break;
}
return $image_all;
}
/**
* 修剪图片：居中裁剪等比缩放
* @param $source_path 原图路径
* @param $target_width 目标宽度
* @param $target_height 目标高度
* @return bool|resource
*/
function imagecropper($source_path,$target_width,$target_height){
$source_info = getimagesize($source_path);
$source_width = $source_info[0];
$source_height = $source_info[1];
$source_mime = $source_info['mime'];
$source_ratio = $source_height / $source_width;
$target_ratio = $target_height / $target_width;
switch ($source_mime)
{
case 'image/gif':
$source_image = imagecreatefromgif($source_path);
break;
case 'image/jpeg':
$source_image = imagecreatefromjpeg($source_path);
break;
case 'image/png':
$source_image = imagecreatefrompng($source_path);
break;
default:
return false;
break;
}
// 横竖构图不同，旋转
if(($target_width-$target_height)*($source_width-$source_height)<0){
// 旋转
$source_image = imagerotate($source_image,90,0);
$source_width = $source_info[1]; // [0]
$source_height = $source_info[0]; // [1]
$source_ratio = $source_height / $source_width;
}
// 源图过高
if ($source_ratio > $target_ratio)
{
$cropped_width = $source_width;
$cropped_height = $source_width * $target_ratio;
$source_x = 0;
$source_y = ($source_height - $cropped_height) / 2;
}
// 源图过宽
elseif ($source_ratio < $target_ratio)
{
$cropped_width = $source_height / $target_ratio;
$cropped_height = $source_height;
$source_x = ($source_width - $cropped_width) / 2;
$source_y = 0;
}
// 源图适中
else
{
$cropped_width = $source_width;
$cropped_height = $source_height;
$source_x = 0;
$source_y = 0;
}
$target_image = imagecreatetruecolor($target_width,$target_height);
$cropped_image = imagecreatetruecolor($cropped_width,$cropped_height);
// 裁剪
imagecopy($cropped_image,$source_image,$source_x,$source_y,$cropped_width,$cropped_height);
// 缩放
imagecopyresampled($target_image,$cropped_image,$target_height,$cropped_height);
return $target_image;
}
更多关于PHP相关内容感兴趣的读者可查看本站专题：《》、《》、《》、《》及《PHP数学运算技巧总结》
希望本文所述对大家PHP程序设计有所帮助。
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。
