<?php
namespace extend;
use Intervention\Image\ImageManagerStatic as Image;
class Poster
{
private $poster;
private $width;
private $height;
public function __construct($width, $height)
{
$this->width = $width;
$this->height = $height;
$this->poster = imagecreatetruecolor($width, $height);
}
/**
* 设置背景色
* @param unknown $red
* @param unknown $green
* @param unknown $blue
*/
public function setBackground($red, $green, $blue)
{
$color = $this->createColor($red, $green, $blue);
imagefilledrectangle($this->poster, 0, 0, $this->width, $this->height, $color);
}
/**
* 创建颜色
* @param unknown $red
* @param unknown $green
* @param unknown $blue
* @return number
*/
private function createColor($red, $green, $blue)
{
$color = imagecolorallocate($this->poster, $red, $green, $blue);
return $color;
}
/**
* 创建透明色
* @param unknown $red
* @param unknown $green
* @param unknown $blue
* @param unknown $alpha 0不透明 127完全透明
*/
public function createAlphaColor($red, $green, $blue, $alpha)
{
$color = imagecolorallocatealpha($this->poster, $red, $green, $blue, $alpha);
return $color;
}
/**
* 将图片写入海报
* @param unknown $image_path
* @param unknown $x
* @param unknown $y
* @param unknown $width
* @param unknown $height
*/
public function imageCopy($image_path, $x, $y, $width, $height, $shape, int $radius = 0, $is_view)
{
if ($shape == 'square') {
$image = $this->getImageResources($image_path);
if ($radius > 0) $image = $this->radius($image_path, $radius);
} else {
$image = $this->circular($image_path);
}
if ($is_view > 0) {
imagecopyresampled($this->poster, $image[ 'image' ], $x, $y, 0, 0, $width, $height, $image[ 'width' ], $image[ 'height' ]);
}
}
/**
* 将图片转为圆形后写入海报
* @param unknown $image_path
* @param unknown $x
* @param unknown $y
* @param unknown $width
* @param unknown $height
*/
public function imageCircularCopy($image_path, $x, $y, $width, $height)
{
$image = $this->circular($image_path);
imagecopyresampled($this->poster, $image[ 'image' ], $x, $y, 0, 0, $width, $height, $image[ 'width' ], $image[ 'height' ]);
}
/**
* 将文字写入海报
* @param string $text
* @param int $size 文字大小
* @param array $color 文字颜色 [$red, $green, $blue]
* @param int $x x轴起始点
* @param int $y y轴起始点
* @param number $max_width 最大宽度
* @param number $max_line 最大行数
* @param string $blod 是否加粗
*/
public function imageText(string $text, int $size, array $color, int $x, int $y, $max_width = 0, $max_line = 1, $blod = false, $is_view = 1, $fontfile = PUBLIC_PATH . 'static/font/Microsoft.ttf')
{
$text = $this->handleStr($text, $size, $max_width, $max_line, $fontfile);
$color = $this->createColor(...$color);
if ($is_view > 0) {
imagettftext($this->poster, $size, 0, $x, $y, $color, $fontfile, $text);
// if ($blod) imagettftext($this->poster, $size, 0, ( $x + 1 ), ( $y + 1 ), $color, $fontfile, $text);
}
}
/**
* 字符串处理
* @param unknown $str
* @param unknown $size
* @param unknown $max_width
* @param unknown $max_line
*/
private function handleStr($str, $size, $max_width, $max_line, $fontfile)
{
if (empty($str)) return $str;
mb_internal_encoding("UTF-8");
$letter = [];
$content = '';
$line = 1;
for ($i = 0; $i < mb_strlen($str); $i++) {
$letter[] = mb_substr($str, $i, 1);
}
foreach ($letter as $l) {
$temp_str = $content . " " . $l;
$fontBox = imagettfbbox($size, 0, $fontfile, $temp_str);
if (( $fontBox[ 2 ] > $max_width ) && ( $content !== "" )) {
$content .= "\n";
$line += 1;
}
if ($line <= $max_line) {
$content .= $l;
} else {
$content = mb_substr($content, 0, ( mb_strlen($content) - 2 )) . '...';
break;
}
}
return $content;
}
/**
* 将图片转正圆
* @param unknown $filename
*/
private function circular($filename)
{
$image_info = $this->getImageResources($filename);
$width = min($image_info[ 'width' ], $image_info[ 'height' ]);
$height = $width;
// 如果图片不是正方形
if ($image_info[ 'width' ] != $image_info[ 'height' ]) {
$temp_file_path = 'upload/temp_' . uniqid() . '.' . $image_info[ 'ext' ];
$image_manager = Image::make($filename)->fit($width, $height, function($constraint) {
}, 'center');
$image_manager->save($temp_file_path);
$image_info = $this->getImageResources($temp_file_path);
unlink($temp_file_path);
}
$image = imagecreatetruecolor($width, $height);
imagesavealpha($image, true);
$bg = imagecolorallocatealpha($image, 255, 255, 255, 127);
imagefill($image, 0, 0, $bg);
$r = $width / 2; //圆半径
$y_x = $r; //圆心X坐标
$y_y = $r; //圆心Y坐标
for ($x = 0; $x < $width; $x++) {
for ($y = 0; $y < $height; $y++) {
$rgbColor = imagecolorat($image_info[ 'image' ], $x, $y);
if (( ( ( $x - $r ) * ( $x - $r ) + ( $y - $r ) * ( $y - $r ) ) < ( $r * $r ) )) {
imagesetpixel($image, $x, $y, $rgbColor);
}
}
}
$image_info[ 'image' ] = $image;
return $image_info;
}
/**
* 图片设置圆角
* @param string $filename
* @param int $radius
*/
private function radius(string $filename, int $radius)
{
$image_info = $this->getImageResources($filename);
// 创建画布
$image = imagecreatetruecolor($image_info[ 'width' ], $image_info[ 'height' ]);
imagesavealpha($image, true);
$bg = imagecolorallocatealpha($image, 255, 255, 255, 127); // 创建一个完全透明色
imagefill($image, 0, 0, $bg);
for ($x = 0; $x < $image_info[ 'width' ]; $x++) {
for ($y = 0; $y < $image_info[ 'height' ]; $y++) {
$rgb_color = imagecolorat($image_info[ 'image' ], $x, $y);//获取像素索引
if (( $x >= $radius && $x <= ( $image_info[ 'width' ] - $radius ) ) || ( $y >= $radius && $y <= ( $image_info[ 'height' ] - $radius ) )) {
//不在四角的范围内,直接画
imagesetpixel($image, $x, $y, $rgb_color);
} else {
//在四角的范围内选择画
//上左
$y_x = $radius; //圆心X坐标
$y_y = $radius; //圆心Y坐标
if (( ( ( $x - $y_x ) * ( $x - $y_x ) + ( $y - $y_y ) * ( $y - $y_y ) ) <= ( $radius * $radius ) )) {
imagesetpixel($image, $x, $y, $rgb_color);
}
//上右
$y_x = $image_info[ 'width' ] - $radius; //圆心X坐标
$y_y = $radius; //圆心Y坐标
if (( ( ( $x - $y_x ) * ( $x - $y_x ) + ( $y - $y_y ) * ( $y - $y_y ) ) <= ( $radius * $radius ) )) {
imagesetpixel($image, $x, $y, $rgb_color);
}
//下左
$y_x = $radius; //圆心X坐标
$y_y = $image_info[ 'height' ] - $radius; //圆心Y坐标
if (( ( ( $x - $y_x ) * ( $x - $y_x ) + ( $y - $y_y ) * ( $y - $y_y ) ) <= ( $radius * $radius ) )) {
imagesetpixel($image, $x, $y, $rgb_color);
}
//下右
$y_x = $image_info[ 'width' ] - $radius; //圆心X坐标
$y_y = $image_info[ 'height' ] - $radius; //圆心Y坐标
if (( ( ( $x - $y_x ) * ( $x - $y_x ) + ( $y - $y_y ) * ( $y - $y_y ) ) <= ( $radius * $radius ) )) {
imagesetpixel($image, $x, $y, $rgb_color);
}
}
}
}
$image_info[ 'image' ] = $image;
return $image_info;
}
/**
* 划线
* @param $x1
* @param $y1
* @param $x2
* @param $y2
*/
private function imageline($x1, $y1, $x2, $y2, $rgb)
{
$color = $this->createColor(...$rgb);
imageline($this->poster, $x1, $y1, $x2, $y2, $color);
}
/**
* 创建海报内容
* @param unknown $data
* @return \extend\Poster|multitype:
*/
public function create($data)
{
try {
foreach ($data as $item) {
$action = $item[ 'action' ];
$this->$action(...$item[ 'data' ]);
}
return $this;
} catch (\Exception $e) {
return error(-1, $e->getMessage() . $e->getFile() . $e->getLine());
}
}
/**
* 获取图片资源
* @param $filename
* @return array
*/
private function getImageResources($filename)
{
try {
[ 0 => $width, 1 => $height, 'mime' => $mime ] = getimagesize($filename);
} catch (\Exception $e) {
$filename = 'public/static/img/default_img/square.png'; // 默认图片
[ 0 => $width, 1 => $height, 'mime' => $mime ] = getimagesize($filename);
}
$ext = explode('/', $mime)[ 1 ];
switch ( $ext ) {
case "png":
$image = @imagecreatefrompng($filename);
break;
case "jpeg":
$image = @imagecreatefromjpeg($filename);
break;
case "jpg":
$image = @imagecreatefromjpeg($filename);
break;
case "gif":
$image = @imagecreatefromgif($filename);
break;
case "webp":
$image = @imagecreatefromwebp($filename);
break;
}
return [
'width' => $width,
'height' => $height,
'mime' => $mime,
'ext' => $ext,
'image' => $image
];
}
/**
* 校验目录是否可写
* @param $path
* @return array
*/
private function checkPath($path)
{
if (is_dir($path) || mkdir($path, intval('0755', 8), true)) {
return success();
}
return error(-1, "directory {$path} creation failed");
}
/**
* 输出jpeg格式的海报
* @param string $path 图片生成路径
* @param string $name 图片名称
*/
public function jpeg($path, $name)
{
$check_res = $this->checkPath($path);
if ($check_res[ 'code' ] < 0) return $check_res;
try {
$filename = $path . '/' . $name . '.jpg';
header("Content-type: image/jpeg"); // 定义输出类型
imagejpeg($this->poster, $filename, 100); // 输出图片
imagedestroy($this->poster); // 销毁图片资源
header("Content-type: text/plain");
return success(0, '', [ 'path' => $filename ]);
} catch (\Exception $e) {
return error(-1, $e->getMessage());
}
}
}