/**
* 切成正方形
*
*/
public static function squre($src_file, $dest_file, $dest_type, $limit_min = 400, $limit_max = 800)
{
$tmp = tempnam(Tools_help::sys_get_temp_dir(), 'img_');
if (Tools_help::saveFile($src_file, $tmp)) {
list($src_width, $src_height, $type) = @getimagesize($tmp);
if ($src_width && $src_height && $type) {
$image = array('width' => $src_width, 'height' => $src_height, 'type' => $type);
switch ($type) {
case IMAGETYPE_PNG:
$image['image'] = @imagecreatefrompng($tmp);
break;
case IMAGETYPE_JPEG:
$image['image'] = @imagecreatefromjpeg($tmp);
break;
case IMAGETYPE_BMP:
$image['image'] = @imagecreatefromwbmp($tmp);
break;
case IMAGETYPE_GIF:
$image['image'] = @imagecreatefromgif($tmp);
break;
default:
$image['image'] = false;
break;
}
if ($image['image']) {
if ($image['width'] > $image['height']) {
//宽图
if ($image['width'] > $limit_max) {
//缩
$image['dest_width'] = $limit_max;
$image['dest_height'] = $limit_max;
$image['res_width'] = $limit_max;
$image['res_height'] = round($image['height'] * $image['dest_width'] / $image['width']);
$image['start_x'] = 0;
$image['start_y'] = round(($image['dest_height'] - $image['res_height']) / 2);
} elseif ($image['width'] < $limit_min) {
//放
$image['dest_width'] = $limit_min;
$image['dest_height'] = $limit_min;
$image['res_width'] = $limit_min;
$image['res_height'] = round($image['height'] * $image['dest_width'] / $image['width']);
$image['start_x'] = 0;
$image['start_y'] = round(($image['dest_height'] - $image['res_height']) / 2);
} else {
$image['dest_width'] = $image['width'];
$image['dest_height'] = $image['width'];
$image['res_width'] = $image['width'];
$image['res_height'] = $image['height'];
$image['start_x'] = 0;
$image['start_y'] = round(($image['dest_height'] - $image['res_height']) / 2);
}
} elseif ($image['width'] < $image['height']) {
//长图
if ($image['height'] > $limit_max) {
//缩
$image['dest_width'] = $limit_max;
$image['dest_height'] = $limit_max;
$image['res_width'] = round($image['width'] * $image['dest_width'] / $image['height']);
$image['res_height'] = $limit_max;
$image['start_x'] = round(($image['dest_width'] - $image['res_width']) / 2);
$image['start_y'] = 0;
} elseif ($image['height'] < $limit_min) {
//放
$image['dest_width'] = $limit_min;
$image['dest_height'] = $limit_min;
$image['res_width'] = round($image['width'] * $image['dest_width'] / $image['height']);
$image['res_height'] = $limit_min;
$image['start_x'] = round(($image['dest_width'] - $image['res_width']) / 2);
$image['start_y'] = 0;
} else {
$image['dest_width'] = $image['height'];
$image['dest_height'] = $image['height'];
$image['res_width'] = $image['width'];
$image['res_height'] = $image['height'];
$image['start_x'] = round(($image['dest_width'] - $image['res_width']) / 2);
$image['start_y'] = 0;
}
} else {
if ($image['width'] > $limit_max) {
$image['dest_width'] = $limit_max;
$image['dest_height'] = $limit_max;
$image['res_width'] = $limit_max;
$image['res_height'] = $limit_max;
$image['start_x'] = 0;
$image['start_y'] = 0;
} elseif ($image['width'] < $limit_min) {
$image['dest_width'] = $limit_min;
$image['dest_height'] = $limit_min;
$image['res_width'] = $limit_min;
$image['res_height'] = $limit_min;
$image['start_x'] = 0;
$image['start_y'] = 0;
} else {
if ($dest_file && $dest_type) {
return self::write($dest_type, $image['image'], $dest_file);
} else {
return $image['image'];
}
}
}
$canvas = self::createWhiteImage($image['dest_width'], $image['dest_height']);
if (@imagecopyresampled($canvas, $image['image'], $image['start_x'], $image['start_y'], 0, 0, $image['res_width'], $image['res_height'], $image['width'], $image['height'])) {
imagedestroy($image['image']);
if ($dest_file && $dest_type) {
if (self::write($dest_type, $canvas, $dest_file)) {
imagedestroy($canvas);
return true;
} else {
return $canvas;
}
}
}
}
}
}
return false;
}
