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thinkphp3.2.5 GIF. class. php for php7.4
2022-06-25 12:26:00 【sr_ www】
PHP7.4 The use of curly braces to access arrays and string offsets is no longer supported
PHP7.4 Arrays are no longer supported {} How to write it , Unified as array []
route ：/ThinkPHP/Library/Think/Image/Driver/GIF.class.php
<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2010 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: Wheat Dang seedling <[email protected]> <http://www.zjzit.cn>
// +----------------------------------------------------------------------
// | GIF.class.php 2013-03-09
// +----------------------------------------------------------------------
namespace Think\Image\Driver;
class GIF {
/** * GIF Frame list * @var array */
private $frames = array();
/** * Waiting time list per frame * @var array */
private $delays = array();
/** * Construction method , Used to decode GIF picture * @param string $src GIF Picture data * @param string $mod Picture data type */
public function __construct($src = null, $mod = 'url') {
if (!is_null($src)) {
if ('url' == $mod && is_file($src)) {
$src = file_get_contents($src);
}
/* decode GIF picture */
try {
$de = new GIFDecoder($src);
$this->frames = $de->GIFGetFrames();
$this->delays = $de->GIFGetDelays();
} catch (\Exception $e) {
E(" decode GIF Picture error ");
}
}
}
/** * Set or get the data of the current frame * @param string $stream Binary data flow * @return boolean Acquired data */
public function image($stream = null) {
if (is_null($stream)) {
$current = current($this->frames);
return false === $current ? reset($this->frames) : $current;
} else {
$this->frames[key($this->frames)] = $stream;
}
}
/** * Moves the current frame to the next frame * @return string Current frame data */
public function nextImage() {
return next($this->frames);
}
/** * Encode and save current GIF picture * @param string $gifname Image name */
public function save($gifname) {
$gif = new GIFEncoder($this->frames, $this->delays, 0, 2, 0, 0, 0, 'bin');
file_put_contents($gifname, $gif->GetAnimation());
}
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu :: :: This class is a rewritten 'GifMerge.class.php' version. :: :: Modification: :: - Simplified and easy code, :: - Ultra fast encoding, :: - Built-in errors, :: - Stable working :: :: :: Updated at 2007. 02. 13. '00.05.AM' :: :: :: :: Try on-line GIFBuilder Form demo based on GIFEncoder. :: :: http://gifs.hu/phpclasses/demos/GifBuilder/ :: ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: */
class GIFEncoder {
private $GIF = "GIF89a"; /* GIF header 6 bytes */
private $VER = "GIFEncoder V2.05"; /* Encoder version */
private $BUF = array();
private $LOP = 0;
private $DIS = 2;
private $COL = -1;
private $IMG = -1;
private $ERR = array(
'ERR00' => "Does not supported function for only one image!",
'ERR01' => "Source is not a GIF image!",
'ERR02' => "Unintelligible flag ",
'ERR03' => "Does not make animation from animated GIF source",
);
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFEncoder... :: */
public function __construct($GIF_src, $GIF_dly, $GIF_lop, $GIF_dis, $GIF_red, $GIF_grn, $GIF_blu, $GIF_mod) {
if (!is_array($GIF_src) && !is_array($GIF_dly)) {
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;
}
}
}
$this->GIFAddHeader();
for ($i = 0; $i < count($this->BUF); $i++) {
$this->GIFAddFrames($i, $GIF_dly[$i]);
}
$this->GIFAddFooter();
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFAddHeader... :: */
private function GIFAddHeader() {
$cmap = 0;
if (ord($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" . $this->GIFWord($this->LOP) . "\0";
}
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFAddFrames... :: */
private function GIFAddFrames($i, $d) {
$Locals_str = 13 + 3 * (2 << (ord($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 "!":
$Locals_img = substr($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->GIFBlockCompare($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... :: */
private function GIFAddFooter() {
$this->GIF .= ";";
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFBlockCompare... :: */
private function GIFBlockCompare($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 * $i + 2]
) {
return (0);
}
}
return (1);
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFWord... :: */
private function GIFWord($int) {
return (chr($int & 0xFF) . chr(($int >> 8) & 0xFF));
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GetAnimation... :: */
public function GetAnimation() {
return ($this->GIF);
}
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFDecoder Version 2.0 by László Zsidi, http://gifs.hu :: :: Created at 2007. 02. 01. '07.47.AM' :: :: :: :: :: Try on-line GIFBuilder Form demo based on GIFDecoder. :: :: http://gifs.hu/phpclasses/demos/GifBuilder/ :: ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: */
class GIFDecoder {
private $GIF_buffer = array();
private $GIF_arrays = array();
private $GIF_delays = array();
private $GIF_stream = "";
private $GIF_string = "";
private $GIF_bfseek = 0;
private $GIF_screen = array();
private $GIF_global = array();
private $GIF_sorted;
private $GIF_colorS;
private $GIF_colorC;
private $GIF_colorF;
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFDecoder ( $GIF_pointer ) :: */
public function __construct($GIF_pointer) {
$this->GIF_stream = $GIF_pointer;
$this->GIFGetByte(6); // GIF89a
$this->GIFGetByte(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->GIFGetByte(3 * $this->GIF_colorS);
$this->GIF_global = $this->GIF_buffer;
}
/* * * 05.06.2007. * Made a little modification * * - for ( $cycle = 1; $cycle; ) { + if ( GIFDecoder::GIFGetByte ( 1 ) ) { - switch ( $this->GIF_buffer [ 0 ] ) { - case 0x21: - GIFDecoder::GIFReadExtensions ( ); - break; - case 0x2C: - GIFDecoder::GIFReadDescriptor ( ); - break; - case 0x3B: - $cycle = 0; - break; - } - } + else { + $cycle = 0; + } - } */
for ($cycle = 1; $cycle;) {
if ($this->GIFGetByte(1)) {
switch ($this->GIF_buffer[0]) {
case 0x21:
$this->GIFReadExtensions();
break;
case 0x2C:
$this->GIFReadDescriptor();
break;
case 0x3B:
$cycle = 0;
break;
}
} else {
$cycle = 0;
}
}
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFReadExtension ( ) :: */
private function GIFReadExtensions() {
$this->GIFGetByte(1);
for (;;) {
$this->GIFGetByte(1);
if (($u = $this->GIF_buffer[0]) == 0x00) {
break;
}
$this->GIFGetByte($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 ( ) :: */
private function GIFReadDescriptor() {
$GIF_screen = array();
$this->GIFGetByte(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";
$this->GIFPutByte($this->GIF_screen);
if (1 == $GIF_colorF) {
$this->GIFGetByte(3 * $GIF_size);
$this->GIFPutByte($this->GIF_buffer);
} else {
$this->GIFPutByte($this->GIF_global);
}
$this->GIF_string .= chr(0x2C);
$GIF_screen[8] &= 0x40;
$this->GIFPutByte($GIF_screen);
$this->GIFGetByte(1);
$this->GIFPutByte($this->GIF_buffer);
for (;;) {
$this->GIFGetByte(1);
$this->GIFPutByte($this->GIF_buffer);
if (($u = $this->GIF_buffer[0]) == 0x00) {
break;
}
$this->GIFGetByte($u);
$this->GIFPutByte($this->GIF_buffer);
}
$this->GIF_string .= chr(0x3B);
/* Add frames into $GIF_stream array... */
$this->GIF_arrays[] = $this->GIF_string;
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFGetByte ( $len ) :: */
/* * * 05.06.2007. * Made a little modification * * - function GIFGetByte ( $len ) { - $this->GIF_buffer = Array ( ); - - for ( $i = 0; $i < $len; $i++ ) { + if ( $this->GIF_bfseek > strlen ( $this->GIF_stream ) ) { + return 0; + } - $this->GIF_buffer [ ] = ord ( $this->GIF_stream { $this->GIF_bfseek++ } ); - } + return 1; - } */
private function GIFGetByte($len) {
$this->GIF_buffer = array();
for ($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 ( $bytes ) :: */
private function GIFPutByte($bytes) {
for ($i = 0; $i < count($bytes); $i++) {
$this->GIF_string .= chr($bytes[$i]);
}
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: PUBLIC FUNCTIONS :: :: :: GIFGetFrames ( ) :: */
public function GIFGetFrames() {
return ($this->GIF_arrays);
}
/* ::::::::::::::::::::::::::::::::::::::::::::::::::: :: :: GIFGetDelays ( ) :: */
public function GIFGetDelays() {
return ($this->GIF_delays);
}
}
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