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extend/image/Image.php Executable file
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace image;
use image\image\gif\Gif;
use image\image\Exception as ImageException;
class Image
{
/* 缩略图相关常量定义 */
const THUMB_SCALING = 1; //常量，标识缩略图等比例缩放类型
const THUMB_FILLED = 2; //常量，标识缩略图缩放后填充类型
const THUMB_CENTER = 3; //常量，标识缩略图居中裁剪类型
const THUMB_NORTHWEST = 4; //常量，标识缩略图左上角裁剪类型
const THUMB_SOUTHEAST = 5; //常量，标识缩略图右下角裁剪类型
const THUMB_FIXED = 6; //常量，标识缩略图固定尺寸缩放类型
/* 水印相关常量定义 */
const WATER_NORTHWEST = 1; //常量，标识左上角水印
const WATER_NORTH = 2; //常量，标识上居中水印
const WATER_NORTHEAST = 3; //常量，标识右上角水印
const WATER_WEST = 4; //常量，标识左居中水印
const WATER_CENTER = 5; //常量，标识居中水印
const WATER_EAST = 6; //常量，标识右居中水印
const WATER_SOUTHWEST = 7; //常量，标识左下角水印
const WATER_SOUTH = 8; //常量，标识下居中水印
const WATER_SOUTHEAST = 9; //常量，标识右下角水印
/* 翻转相关常量定义 */
const FLIP_X = 1; //X轴翻转
const FLIP_Y = 2; //Y轴翻转
/**
* 图像资源对象
*
* @var resource
*/
protected $im;
/** @var Gif */
protected $gif;
/**
* 图像信息，包括 width, height, type, mime, size
*
* @var array
*/
protected $info;
protected function __construct(\SplFileInfo $file)
{
//获取图像信息
$info = @getimagesize($file->getPathname());
//检测图像合法性
if (false === $info || (IMAGETYPE_GIF === $info[2] && empty($info['bits']))) {
throw new ImageException('Illegal image file');
}
//设置图像信息
$this->info = [
'width' => $info[0],
'height' => $info[1],
'type' => image_type_to_extension($info[2], false),
'mime' => $info['mime'],
];
//打开图像
if ('gif' == $this->info['type']) {
$this->gif = new Gif($file->getPathname());
$this->im = @imagecreatefromstring($this->gif->image());
} else {
$fun = "imagecreatefrom{$this->info['type']}";
$this->im = @$fun($file->getPathname());
}
if (empty($this->im)) {
throw new ImageException('Failed to create image resources!');
}
}
/**
* 打开一个图片文件
* @param \SplFileInfo|string $file
* @return Image
*/
public static function open($file)
{
if (is_string($file)) {
$file = new \SplFileInfo($file);
}
if (!$file->isFile()) {
throw new ImageException('image file not exist');
}
return new self($file);
}
/**
* 保存图像
* @param string $pathname 图像保存路径名称
* @param null|string $type 图像类型
* @param int $quality 图像质量
* @param bool $interlace 是否对JPEG类型图像设置隔行扫描
* @return $this
*/
public function save($pathname, $type = null, $quality = 80, $interlace = true)
{
//自动获取图像类型
if (is_null($type)) {
$type = $this->info['type'];
} else {
$type = strtolower($type);
}
//保存图像
if ('jpeg' == $type || 'jpg' == $type) {
//JPEG图像设置隔行扫描
imageinterlace($this->im, $interlace);
imagejpeg($this->im, $pathname, $quality);
} elseif ('gif' == $type && !empty($this->gif)) {
$this->gif->save($pathname);
} elseif ('png' == $type) {
//设定保存完整的 alpha 通道信息
imagesavealpha($this->im, true);
//ImagePNG生成图像的质量范围从0到9的
imagepng($this->im, $pathname, min((int)($quality / 10), 9));
} else {
$fun = 'image' . $type;
$fun($this->im, $pathname);
}
return $this;
}
/**
* 返回图像宽度
* @return int 图像宽度
*/
public function width()
{
return $this->info['width'];
}
/**
* 返回图像高度
* @return int 图像高度
*/
public function height()
{
return $this->info['height'];
}
/**
* 返回图像类型
* @return string 图像类型
*/
public function type()
{
return $this->info['type'];
}
/**
* 返回图像MIME类型
* @return string 图像MIME类型
*/
public function mime()
{
return $this->info['mime'];
}
/**
* 返回图像尺寸数组 0 - 图像宽度，1 - 图像高度
* @return array 图像尺寸
*/
public function size()
{
return [$this->info['width'], $this->info['height']];
}
/**
* 旋转图像
* @param int $degrees 顺时针旋转的度数
* @return $this
*/
public function rotate($degrees = 90)
{
do {
$img = imagerotate($this->im, -$degrees, imagecolorallocatealpha($this->im, 0, 0, 0, 127));
imagedestroy($this->im);
$this->im = $img;
} while (!empty($this->gif) && $this->gifNext());
$this->info['width'] = imagesx($this->im);
$this->info['height'] = imagesy($this->im);
return $this;
}
/**
* 翻转图像
* @param integer $direction 翻转轴,X或者Y
* @return $this
*/
public function flip($direction = self::FLIP_X)
{
//原图宽度和高度
$w = $this->info['width'];
$h = $this->info['height'];
do {
$img = imagecreatetruecolor($w, $h);
switch ($direction) {
case self::FLIP_X:
for ($y = 0; $y < $h; $y++) {
imagecopy($img, $this->im, 0, $h - $y - 1, 0, $y, $w, 1);
}
break;
case self::FLIP_Y:
for ($x = 0; $x < $w; $x++) {
imagecopy($img, $this->im, $w - $x - 1, 0, $x, 0, 1, $h);
}
break;
default:
throw new ImageException('不支持的翻转类型');
}
imagedestroy($this->im);
$this->im = $img;
} while (!empty($this->gif) && $this->gifNext());
return $this;
}
/**
* 裁剪图像
*
* @param integer $w 裁剪区域宽度
* @param integer $h 裁剪区域高度
* @param integer $x 裁剪区域x坐标
* @param integer $y 裁剪区域y坐标
* @param integer $width 图像保存宽度
* @param integer $height 图像保存高度
*
* @return $this
*/
public function crop($w, $h, $x = 0, $y = 0, $width = null, $height = null)
{
//设置保存尺寸
empty($width) && $width = $w;
empty($height) && $height = $h;
do {
//创建新图像
$img = imagecreatetruecolor($width, $height);
// 调整默认颜色
$color = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $color);
//裁剪
imagecopyresampled($img, $this->im, 0, 0, $x, $y, $width, $height, $w, $h);
imagedestroy($this->im); //销毁原图
//设置新图像
$this->im = $img;
} while (!empty($this->gif) && $this->gifNext());
$this->info['width'] = (int)$width;
$this->info['height'] = (int)$height;
return $this;
}
/**
* 生成缩略图
*
* @param integer $width 缩略图最大宽度
* @param integer $height 缩略图最大高度
* @param int $type 缩略图裁剪类型
*
* @return $this
*/
public function thumb($width, $height, $type = self::THUMB_SCALING)
{
//原图宽度和高度
$w = $this->info['width'];
$h = $this->info['height'];
/* 计算缩略图生成的必要参数 */
switch ($type) {
/* 等比例缩放 */
case self::THUMB_SCALING:
//原图尺寸小于缩略图尺寸则不进行缩略
if ($w < $width && $h < $height) {
return false;
}
//计算缩放比例
$scale = min($width / $w, $height / $h);
//设置缩略图的坐标及宽度和高度
$x = $y = 0;
$width = $w * $scale;
$height = $h * $scale;
break;
/* 居中裁剪 */
case self::THUMB_CENTER:
//计算缩放比例
$scale = max($width / $w, $height / $h);
//设置缩略图的坐标及宽度和高度
$w = $width / $scale;
$h = $height / $scale;
$x = ($this->info['width'] - $w) / 2;
$y = ($this->info['height'] - $h) / 2;
break;
/* 左上角裁剪 */
case self::THUMB_NORTHWEST:
//计算缩放比例
$scale = max($width / $w, $height / $h);
//设置缩略图的坐标及宽度和高度
$x = $y = 0;
$w = $width / $scale;
$h = $height / $scale;
break;
/* 右下角裁剪 */
case self::THUMB_SOUTHEAST:
//计算缩放比例
$scale = max($width / $w, $height / $h);
//设置缩略图的坐标及宽度和高度
$w = $width / $scale;
$h = $height / $scale;
$x = $this->info['width'] - $w;
$y = $this->info['height'] - $h;
break;
/* 填充 */
case self::THUMB_FILLED:
//计算缩放比例
if ($w < $width && $h < $height) {
$scale = 1;
} else {
$scale = min($width / $w, $height / $h);
}
//设置缩略图的坐标及宽度和高度
$neww = $w * $scale;
$newh = $h * $scale;
$x = $this->info['width'] - $w;
$y = $this->info['height'] - $h;
$posx = ($width - $w * $scale) / 2;
$posy = ($height - $h * $scale) / 2;
do {
//创建新图像
$img = imagecreatetruecolor($width, $height);
// 调整默认颜色
$color = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $color);
//裁剪
imagecopyresampled($img, $this->im, $posx, $posy, $x, $y, $neww, $newh, $w, $h);
imagedestroy($this->im); //销毁原图
$this->im = $img;
} while (!empty($this->gif) && $this->gifNext());
$this->info['width'] = (int)$width;
$this->info['height'] = (int)$height;
return $this;
/* 固定 */
case self::THUMB_FIXED:
$x = $y = 0;
break;
default:
throw new ImageException('不支持的缩略图裁剪类型');
}
/* 裁剪图像 */
$this->crop($w, $h, $x, $y, $width, $height);
return $this;
}
/**
* 添加水印
*
* @param string $source 水印图片路径
* @param int $locate 水印位置
* @param int $alpha 透明度
* @return $this
*/
public function water($source, $locate = self::WATER_SOUTHEAST, $alpha = 100)
{
if (!is_file($source)) {
throw new ImageException('水印图像不存在');
}
//获取水印图像信息
$info = getimagesize($source);
if (false === $info || (IMAGETYPE_GIF === $info[2] && empty($info['bits']))) {
throw new ImageException('非法水印文件');
}
//创建水印图像资源
$fun = 'imagecreatefrom' . image_type_to_extension($info[2], false);
$water = $fun($source);
//设定水印图像的混色模式
imagealphablending($water, true);
/* 设定水印位置 */
switch ($locate) {
/* 右下角水印 */
case self::WATER_SOUTHEAST:
$x = $this->info['width'] - $info[0];
$y = $this->info['height'] - $info[1];
break;
/* 左下角水印 */
case self::WATER_SOUTHWEST:
$x = 0;
$y = $this->info['height'] - $info[1];
break;
/* 左上角水印 */
case self::WATER_NORTHWEST:
$x = $y = 0;
break;
/* 右上角水印 */
case self::WATER_NORTHEAST:
$x = $this->info['width'] - $info[0];
$y = 0;
break;
/* 居中水印 */
case self::WATER_CENTER:
$x = ($this->info['width'] - $info[0]) / 2;
$y = ($this->info['height'] - $info[1]) / 2;
break;
/* 下居中水印 */
case self::WATER_SOUTH:
$x = ($this->info['width'] - $info[0]) / 2;
$y = $this->info['height'] - $info[1];
break;
/* 右居中水印 */
case self::WATER_EAST:
$x = $this->info['width'] - $info[0];
$y = ($this->info['height'] - $info[1]) / 2;
break;
/* 上居中水印 */
case self::WATER_NORTH:
$x = ($this->info['width'] - $info[0]) / 2;
$y = 0;
break;
/* 左居中水印 */
case self::WATER_WEST:
$x = 0;
$y = ($this->info['height'] - $info[1]) / 2;
break;
default:
/* 自定义水印坐标 */
if (is_array($locate)) {
list($x, $y) = $locate;
} else {
throw new ImageException('不支持的水印位置类型');
}
}
do {
//添加水印
$src = imagecreatetruecolor($info[0], $info[1]);
// 调整默认颜色
$color = imagecolorallocate($src, 255, 255, 255);
imagefill($src, 0, 0, $color);
imagecopy($src, $this->im, 0, 0, $x, $y, $info[0], $info[1]);
imagecopy($src, $water, 0, 0, 0, 0, $info[0], $info[1]);
imagecopymerge($this->im, $src, $x, $y, 0, 0, $info[0], $info[1], $alpha);
//销毁零时图片资源
imagedestroy($src);
} while (!empty($this->gif) && $this->gifNext());
//销毁水印资源
imagedestroy($water);
return $this;
}
/**
* 图像添加文字
*
* @param string $text 添加的文字
* @param string $font 字体路径
* @param integer $size 字号
* @param string $color 文字颜色
* @param int $locate 文字写入位置
* @param integer $offset 文字相对当前位置的偏移量
* @param integer $angle 文字倾斜角度
*
* @return $this
* @throws ImageException
*/
public function text($text, $font, $size, $color = '#00000000',
$locate = self::WATER_SOUTHEAST, $offset = 0, $angle = 0)
{
if (!is_file($font)) {
throw new ImageException("不存在的字体文件：{$font}");
}
//获取文字信息
$info = imagettfbbox($size, $angle, $font, $text);
$minx = min($info[0], $info[2], $info[4], $info[6]);
$maxx = max($info[0], $info[2], $info[4], $info[6]);
$miny = min($info[1], $info[3], $info[5], $info[7]);
$maxy = max($info[1], $info[3], $info[5], $info[7]);
/* 计算文字初始坐标和尺寸 */
$x = $minx;
$y = abs($miny);
$w = $maxx - $minx;
$h = $maxy - $miny;
/* 设定文字位置 */
switch ($locate) {
/* 右下角文字 */
case self::WATER_SOUTHEAST:
$x += $this->info['width'] - $w;
$y += $this->info['height'] - $h;
break;
/* 左下角文字 */
case self::WATER_SOUTHWEST:
$y += $this->info['height'] - $h;
break;
/* 左上角文字 */
case self::WATER_NORTHWEST:
// 起始坐标即为左上角坐标，无需调整
break;
/* 右上角文字 */
case self::WATER_NORTHEAST:
$x += $this->info['width'] - $w;
break;
/* 居中文字 */
case self::WATER_CENTER:
$x += ($this->info['width'] - $w) / 2;
$y += ($this->info['height'] - $h) / 2;
break;
/* 下居中文字 */
case self::WATER_SOUTH:
$x += ($this->info['width'] - $w) / 2;
$y += $this->info['height'] - $h;
break;
/* 右居中文字 */
case self::WATER_EAST:
$x += $this->info['width'] - $w;
$y += ($this->info['height'] - $h) / 2;
break;
/* 上居中文字 */
case self::WATER_NORTH:
$x += ($this->info['width'] - $w) / 2;
break;
/* 左居中文字 */
case self::WATER_WEST:
$y += ($this->info['height'] - $h) / 2;
break;
default:
/* 自定义文字坐标 */
if (is_array($locate)) {
list($posx, $posy) = $locate;
$x += $posx;
$y += $posy;
} else {
throw new ImageException('不支持的文字位置类型');
}
}
/* 设置偏移量 */
if (is_array($offset)) {
$offset = array_map('intval', $offset);
list($ox, $oy) = $offset;
} else {
$offset = intval($offset);
$ox = $oy = $offset;
}
/* 设置颜色 */
if (is_string($color) && 0 === strpos($color, '#')) {
$color = str_split(substr($color, 1), 2);
$color = array_map('hexdec', $color);
if (empty($color[3]) || $color[3] > 127) {
$color[3] = 0;
}
} elseif (!is_array($color)) {
throw new ImageException('错误的颜色值');
}
do {
/* 写入文字 */
$col = imagecolorallocatealpha($this->im, $color[0], $color[1], $color[2], $color[3]);
imagettftext($this->im, $size, $angle, $x + $ox, $y + $oy, $col, $font, $text);
} while (!empty($this->gif) && $this->gifNext());
return $this;
}
/**
* 切换到GIF的下一帧并保存当前帧
*/
protected function gifNext()
{
ob_start();
ob_implicit_flush(0);
imagegif($this->im);
$img = ob_get_clean();
$this->gif->image($img);
$next = $this->gif->nextImage();
if ($next) {
imagedestroy($this->im);
$this->im = imagecreatefromstring($next);
return $next;
} else {
imagedestroy($this->im);
$this->im = imagecreatefromstring($this->gif->image());
return false;
}
}
/**
* 析构方法，用于销毁图像资源
*/
public function __destruct()
{
empty($this->im) || imagedestroy($this->im);
}
}

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extend/image/image/Exception.php Executable file
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace image\image;
class Exception extends \RuntimeException
{
}

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extend/image/image/gif/Decoder.php Executable file
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace image\image\gif;
class Decoder
{
public $GIF_buffer = [];
public $GIF_arrays = [];
public $GIF_delays = [];
public $GIF_stream = "";
public $GIF_string = "";
public $GIF_bfseek = 0;
public $GIF_screen = [];
public $GIF_global = [];
public $GIF_sorted;
public $GIF_colorS;
public $GIF_colorC;
public $GIF_colorF;
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFDecoder ( $GIF_pointer )
::
*/
public function __construct($GIF_pointer)
{
$this->GIF_stream = $GIF_pointer;
$this->getByte(6); // GIF89a
$this->getByte(7); // Logical Screen Descriptor
$this->GIF_screen = $this->GIF_buffer;
$this->GIF_colorF = $this->GIF_buffer[4] & 0x80 ? 1 : 0;
$this->GIF_sorted = $this->GIF_buffer[4] & 0x08 ? 1 : 0;
$this->GIF_colorC = $this->GIF_buffer[4] & 0x07;
$this->GIF_colorS = 2 << $this->GIF_colorC;
if (1 == $this->GIF_colorF) {
$this->getByte(3 * $this->GIF_colorS);
$this->GIF_global = $this->GIF_buffer;
}
for ($cycle = 1; $cycle;) {
if ($this->getByte(1)) {
switch ($this->GIF_buffer[0]) {
case 0x21:
$this->readExtensions();
break;
case 0x2C:
$this->readDescriptor();
break;
case 0x3B:
$cycle = 0;
break;
}
} else {
$cycle = 0;
}
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFReadExtension ( )
::
*/
public function readExtensions()
{
$this->getByte(1);
for (; ;) {
$this->getByte(1);
if (($u = $this->GIF_buffer[0]) == 0x00) {
break;
}
$this->getByte($u);
/*
* 07.05.2007.
* Implemented a new line for a new function
* to determine the originaly delays between
* frames.
*
*/
if (4 == $u) {
$this->GIF_delays[] = ($this->GIF_buffer[1] | $this->GIF_buffer[2] << 8);
}
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFReadExtension ( )
::
*/
public function readDescriptor()
{
$this->getByte(9);
$GIF_screen = $this->GIF_buffer;
$GIF_colorF = $this->GIF_buffer[8] & 0x80 ? 1 : 0;
if ($GIF_colorF) {
$GIF_code = $this->GIF_buffer[8] & 0x07;
$GIF_sort = $this->GIF_buffer[8] & 0x20 ? 1 : 0;
} else {
$GIF_code = $this->GIF_colorC;
$GIF_sort = $this->GIF_sorted;
}
$GIF_size = 2 << $GIF_code;
$this->GIF_screen[4] &= 0x70;
$this->GIF_screen[4] |= 0x80;
$this->GIF_screen[4] |= $GIF_code;
if ($GIF_sort) {
$this->GIF_screen[4] |= 0x08;
}
$this->GIF_string = "GIF87a";
$this->putByte($this->GIF_screen);
if (1 == $GIF_colorF) {
$this->getByte(3 * $GIF_size);
$this->putByte($this->GIF_buffer);
} else {
$this->putByte($this->GIF_global);
}
$this->GIF_string .= chr(0x2C);
$GIF_screen[8] &= 0x40;
$this->putByte($GIF_screen);
$this->getByte(1);
$this->putByte($this->GIF_buffer);
for (; ;) {
$this->getByte(1);
$this->putByte($this->GIF_buffer);
if (($u = $this->GIF_buffer[0]) == 0x00) {
break;
}
$this->getByte($u);
$this->putByte($this->GIF_buffer);
}
$this->GIF_string .= chr(0x3B);
/*
Add frames into $GIF_stream array...
*/
$this->GIF_arrays[] = $this->GIF_string;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFGetByte ( $len )
::
*/
public function getByte($len)
{
$this->GIF_buffer = [];
for ($i = 0; $i < $len; $i++) {
if ($this->GIF_bfseek > strlen($this->GIF_stream)) {
return 0;
}
$this->GIF_buffer[] = ord($this->GIF_stream{$this->GIF_bfseek++});
}
return 1;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFPutByte ( $bytes )
::
*/
public function putByte($bytes)
{
for ($i = 0; $i < count($bytes); $i++) {
$this->GIF_string .= chr($bytes[$i]);
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: PUBLIC FUNCTIONS
::
::
:: GIFGetFrames ( )
::
*/
public function getFrames()
{
return ($this->GIF_arrays);
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFGetDelays ( )
::
*/
public function getDelays()
{
return ($this->GIF_delays);
}
}

222
extend/image/image/gif/Encoder.php Executable file
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace image\image\gif;
class Encoder
{
public $GIF = "GIF89a"; /* GIF header 6 bytes */
public $VER = "GIFEncoder V2.05"; /* Encoder version */
public $BUF = [];
public $LOP = 0;
public $DIS = 2;
public $COL = -1;
public $IMG = -1;
public $ERR = [
'ERR00' => "Does not supported function for only one image!",
'ERR01' => "Source is not a GIF image!",
'ERR02' => "Unintelligible flag ",
'ERR03' => "Does not make animation from animated GIF source",
];
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder...
::
*/
public function __construct(
$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
)
{
if (!is_array($GIF_src)) {
printf("%s: %s", $this->VER, $this->ERR['ERR00']);
exit(0);
}
$this->LOP = ($GIF_lop > -1) ? $GIF_lop : 0;
$this->DIS = ($GIF_dis > -1) ? (($GIF_dis < 3) ? $GIF_dis : 3) : 2;
$this->COL = ($GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1) ?
($GIF_red | ($GIF_grn << 8) | ($GIF_blu << 16)) : -1;
for ($i = 0; $i < count($GIF_src); $i++) {
if (strtolower($GIF_mod) == "url") {
$this->BUF[] = fread(fopen($GIF_src[$i], "rb"), filesize($GIF_src[$i]));
} else if (strtolower($GIF_mod) == "bin") {
$this->BUF[] = $GIF_src[$i];
} else {
printf("%s: %s ( %s )!", $this->VER, $this->ERR['ERR02'], $GIF_mod);
exit(0);
}
if (substr($this->BUF[$i], 0, 6) != "GIF87a" && substr($this->BUF[$i], 0, 6) != "GIF89a") {
printf("%s: %d %s", $this->VER, $i, $this->ERR['ERR01']);
exit(0);
}
for ($j = (13 + 3 * (2 << (ord($this->BUF[$i]{10}) & 0x07))), $k = true; $k; $j++) {
switch ($this->BUF[$i]{$j}) {
case "!":
if ((substr($this->BUF[$i], ($j + 3), 8)) == "NETSCAPE") {
printf("%s: %s ( %s source )!", $this->VER, $this->ERR['ERR03'], ($i + 1));
exit(0);
}
break;
case ";":
$k = false;
break;
}
}
}
$this->addHeader();
for ($i = 0; $i < count($this->BUF); $i++) {
$this->addFrames($i, $GIF_dly[$i]);
}
$this->addFooter();
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddHeader...
::
*/
public function addHeader()
{
if (ord($this->BUF[0]{10}) & 0x80) {
$cmap = 3 * (2 << (ord($this->BUF[0]{10}) & 0x07));
$this->GIF .= substr($this->BUF[0], 6, 7);
$this->GIF .= substr($this->BUF[0], 13, $cmap);
$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . $this->word($this->LOP) . "\0";
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFrames...
::
*/
public function addFrames($i, $d)
{
$Locals_img = '';
$Locals_str = 13 + 3 * (2 << (ord($this->BUF[$i]{10}) & 0x07));
$Locals_end = strlen($this->BUF[$i]) - $Locals_str - 1;
$Locals_tmp = substr($this->BUF[$i], $Locals_str, $Locals_end);
$Global_len = 2 << (ord($this->BUF[0]{10}) & 0x07);
$Locals_len = 2 << (ord($this->BUF[$i]{10}) & 0x07);
$Global_rgb = substr($this->BUF[0], 13,
3 * (2 << (ord($this->BUF[0]{10}) & 0x07)));
$Locals_rgb = substr($this->BUF[$i], 13,
3 * (2 << (ord($this->BUF[$i]{10}) & 0x07)));
$Locals_ext = "!\xF9\x04" . chr(($this->DIS << 2) + 0) .
chr(($d >> 0) & 0xFF) . chr(($d >> 8) & 0xFF) . "\x0\x0";
if ($this->COL > -1 && ord($this->BUF[$i]{10}) & 0x80) {
for ($j = 0; $j < (2 << (ord($this->BUF[$i]{10}) & 0x07)); $j++) {
if (
ord($Locals_rgb{3 * $j + 0}) == (($this->COL >> 16) & 0xFF) &&
ord($Locals_rgb{3 * $j + 1}) == (($this->COL >> 8) & 0xFF) &&
ord($Locals_rgb{3 * $j + 2}) == (($this->COL >> 0) & 0xFF)
) {
$Locals_ext = "!\xF9\x04" . chr(($this->DIS << 2) + 1) .
chr(($d >> 0) & 0xFF) . chr(($d >> 8) & 0xFF) . chr($j) . "\x0";
break;
}
}
}
switch ($Locals_tmp{0}) {
case "!":
/**
* @var string $Locals_img ;
*/
$Locals_img = substr($Locals_tmp, 8, 10);
$Locals_tmp = substr($Locals_tmp, 18, strlen($Locals_tmp) - 18);
break;
case ",":
$Locals_img = substr($Locals_tmp, 0, 10);
$Locals_tmp = substr($Locals_tmp, 10, strlen($Locals_tmp) - 10);
break;
}
if (ord($this->BUF[$i]{10}) & 0x80 && $this->IMG > -1) {
if ($Global_len == $Locals_len) {
if ($this->blockCompare($Global_rgb, $Locals_rgb, $Global_len)) {
$this->GIF .= ($Locals_ext . $Locals_img . $Locals_tmp);
} else {
$byte = ord($Locals_img{9});
$byte |= 0x80;
$byte &= 0xF8;
$byte |= (ord($this->BUF[0]{10}) & 0x07);
$Locals_img{9} = chr($byte);
$this->GIF .= ($Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp);
}
} else {
$byte = ord($Locals_img{9});
$byte |= 0x80;
$byte &= 0xF8;
$byte |= (ord($this->BUF[$i]{10}) & 0x07);
$Locals_img{9} = chr($byte);
$this->GIF .= ($Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp);
}
} else {
$this->GIF .= ($Locals_ext . $Locals_img . $Locals_tmp);
}
$this->IMG = 1;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFooter...
::
*/
public function addFooter()
{
$this->GIF .= ";";
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFBlockCompare...
::
*/
public function blockCompare($GlobalBlock, $LocalBlock, $Len)
{
for ($i = 0; $i < $Len; $i++) {
if (
$GlobalBlock{3 * $i + 0} != $LocalBlock{3 * $i + 0} ||
$GlobalBlock{3 * $i + 1} != $LocalBlock{3 * $i + 1} ||
$GlobalBlock{3 * $i + 2} != $LocalBlock{3 * $i + 2}
) {
return (0);
}
}
return (1);
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFWord...
::
*/
public function word($int)
{
return (chr($int & 0xFF) . chr(($int >> 8) & 0xFF));
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GetAnimation...
::
*/
public function getAnimation()
{
return ($this->GIF);
}
}

86
extend/image/image/gif/Gif.php Executable file
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@ -0,0 +1,86 @@
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace image\image\gif;
class Gif
{
/**
* GIF帧列表
*
* @var array
*/
private $frames = [];
/**
* 每帧等待时间列表
*
* @var array
*/
private $delays = [];
/**
* 构造方法，用于解码GIF图片
*
* @param string $src GIF图片数据
* @param string $mod 图片数据类型
* @throws \Exception
*/
public function __construct($src = null, $mod = 'url')
{
if (!is_null($src)) {
if ('url' == $mod && is_file($src)) {
$src = file_get_contents($src);
}
/* 解码GIF图片 */
try {
$de = new Decoder($src);
$this->frames = $de->getFrames();
$this->delays = $de->getDelays();
} catch (\Exception $e) {
throw new \Exception("解码GIF图片出错");
}
}
}
/**
* 设置或获取当前帧的数据
*
* @param string $stream 二进制数据流
* @return mixed 获取到的数据
*/
public function image($stream = null)
{
if (is_null($stream)) {
$current = current($this->frames);
return false === $current ? reset($this->frames) : $current;
}
$this->frames[key($this->frames)] = $stream;
}
/**
* 将当前帧移动到下一帧
*
* @return string 当前帧数据
*/
public function nextImage()
{
return next($this->frames);
}
/**
* 编码并保存当前GIF图片
*
* @param string $pathname 图片名称
*/
public function save($pathname)
{
$gif = new Encoder($this->frames, $this->delays, 0, 2, 0, 0, 0, 'bin');
file_put_contents($pathname, $gif->getAnimation());
}
}