Animation gifancoder.Class.php和无循环GIF动画
我正在使用GIFEncoderclass将一系列GIF图像转换为动画GIF 我想做的是设置循环，使其不会重复 当我将循环设置为1时，在Chrome和IE中它不会播放一次。。。但循环一次（因此播放两次）。在FireFox中，虽然它可以按预期工作，但不会循环播放 这是GIF编码器中的错误吗 我做错什么了吗 我该如何解决这个问题 我的代码Animation gifancoder.Class.php和无循环GIF动画,animation,loops,encoding,gif,Animation,Loops,Encoding,Gif,我正在使用GIFEncoderclass将一系列GIF图像转换为动画GIF 我想做的是设置循环，使其不会重复 当我将循环设置为1时，在Chrome和IE中它不会播放一次。。。但循环一次（因此播放两次）。在FireFox中，虽然它可以按预期工作，但不会循环播放 这是GIF编码器中的错误吗 我做错什么了吗 我该如何解决这个问题 我的代码 $gif = new GIFEncoder ( $frames, // frames array
$gif = new GIFEncoder (
$frames, // frames array
$time, // elapsed time array
1, // loops (0 = infinite)
0, // disposal
3, 2, 1,
0,// rgb of transparency
"url" // source type
);
Class GIFEncoder {
var $GIF = "GIF89a"; /* GIF header 6 bytes */
var $VER = "GIFEncoder V3.00"; /* Encoder version */
var $BUF = Array ( );
var $OFS = Array ( );
var $SIG = 0;
var $LOP = 0;
var $DIS = 2;
var $COL = -1;
var $IMG = -1;
var $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...
::
*/
function GIFEncoder (
$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
$GIF_red, $GIF_grn, $GIF_blu, $GIF_ofs,
$GIF_mod
) {
if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_dly ) ) {
printf ( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] );
exit ( 0 );
}
if ( is_array ( $GIF_ofs ) && count ( $GIF_ofs ) > 1 ) {
$this->SIG = 1;
$this->OFS = $GIF_ofs;
}
$this->LOP = $GIF_lop === false ? false : (( $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;
}
}
}
GIFEncoder::GIFAddHeader ( );
for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );
}
GIFEncoder::GIFAddFooter ( );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddHeader...
::
*/
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, $cmap );
if($this->LOP !== false)
{
$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . GIFEncoder::GIFWord ( $this->LOP ) . "\0";
}
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFrames...
::
*/
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 ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
else {
/*
*
* XY Padding...
*
*/
if ( $this->SIG == 1 ) {
$Locals_img { 1 } = chr ( $this->OFS [ $i ] [ 0 ] & 0xFF );
$Locals_img { 2 } = chr ( ( $$this->OFS [ $i ] [ 0 ] & 0xFF00 ) >> 8 );
$Locals_img { 3 } = chr ( $this->OFS [ $i ] [ 1 ] & 0xFF );
$Locals_img { 4 } = chr ( ( $this->OFS [ $i ] [ 1 ] & 0xFF00 ) >> 8 );
}
$byte = ord ( $Locals_img { 9 } );
$byte |= 0x80;
$byte &= 0xF8;
$byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
$Locals_img { 9 } = chr ( $byte );
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
}
}
else {
/*
*
* XY Padding...
*
*/
if ( $this->SIG == 1 ) {
$Locals_img { 1 } = chr ( $this->OFS [ $i ] [ 0 ] & 0xFF );
$Locals_img { 2 } = chr ( ( $$this->OFS [ $i ] [ 0 ] & 0xFF00 ) >> 8 );
$Locals_img { 3 } = chr ( $this->OFS [ $i ] [ 1 ] & 0xFF );
$Locals_img { 4 } = chr ( ( $this->OFS [ $i ] [ 1 ] & 0xFF00 ) >> 8 );
}
$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...
::
*/
function GIFAddFooter ( ) {
$this->GIF .= ";";
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFBlockCompare...
::
*/
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...
::
*/
function GIFWord ( $int ) {
return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GetAnimation...
::
*/
function GetAnimation ( ) {
return ( $this->GIF );
}
}
Class编码器{
var$GIF=“GIF89a”/*GIF头6字节*/
var$VER=“GIFEncoder V3.00”/*编码器版本*/
var$BUF=Array（）；
var$OFS=Array（）；
var$SIG=0；
风险价值$LOP=0；
var$DIS=2；
var$COL=-1；
var$IMG=-1；
var$ERR=Array(
“ERR00'=>”不支持只对一个图像使用此函数！”，
'ERR01'=>“源不是GIF图像！”，
'ERR02'=>“无法理解的标志”，
'ERR03'=>“不从动画GIF源制作动画”，
);
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
：：吉福。。。
::
*/
功能编码器(
$GIF\u src、$GIF\u dly、$GIF\u lop、$GIF\u dis、，
$GIF_red、$GIF_grn、$GIF_blu、$GIF_ofs、，
$GIF_mod
) {
如果（！is_数组（$GIF_src）&&！is_数组（$GIF_dly））{
printf（“%s:%s”，$this->VER，$this->ERR['ERR00']）；
出口（0）；
}
if（is_数组（$GIF_of s）和计数（$GIF_of s）>1）{
$this->SIG=1；
$this->OFS=$GIF\u OFS；
}
$this->LOP=$GIF\u LOP===false？false:（$GIF\u LOP>-1）？$GIF\u LOP:0）；
$this->DIS=（$GIF\u DIS>-1）？（$GIF\u DIS<3）？$GIF\u DIS:3）：2；
$this->COL=（$GIF\u red>-1&&$GIF\u grn>-1&&$GIF\u blu>-1）？
（$GIF_red |）（$GIF_grn BUF[]=$GIF_src[$i]；
}
否则{
printf（“%s:%s（%s）！”，$this->VER，$this->ERR['ERR02']，$GIF\u mod）；
出口（0）；
}
if（substr（$this->BUF[$i]，0,6）！=“GIF87a”&substr（$this->BUF[$i]，0,6）！=“GIF89a”）{
printf（“%s:%d%s”，$this->VER$i，$this->ERR['ERR01']）；
出口（0）；
}
对于（$j=（13+3*（2buf[$i]{10}）和0x07）），$k=TRUE；$k；$j++）{
开关（$this->BUF[$i]{$j}）{
案例“！”：
如果（（substr（$this->BUF[$i]，（$j+3），8））==“NETSCAPE”）{
printf（“%s:%s（%s source）！”，$this->VER，$this->ERR['ERR03']，（$i+1））；
出口（0）；
}
打破
案例“；”：
$k=假；
打破
}
}
}
gifaddencoder:：GIFAddHeader（）；
对于（$i=0；$iBUF）；$i++）{
GIFAddFrames（$i，$GIF_-dly[$i]）；
}
GIFAddFooter（）；
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
：：GIFAddHeader。。。
::
*/
函数GIFAddHeader（）{
$cmap=0；
if（ord（$this->BUF[0]{10}）&0x80）{
$cmap=3*（2buf[0]{10}和0x07））；
$this->GIF.=substr（$this->BUF[0]，6,7）；
$this->GIF.=substr（$this->BUF[0]，13，$cmap）；
如果（$this->LOP！==false）
{
$this->GIF.=“！\377\13NETSCAPE2.0\3\1”。GIF编码器：：GIFWord（$this->LOP）。“\0”；
}
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
：：GIFAddFrames。。。
::
*/
函数GIFAddFrames（$i，$d）{
$Locals_str=13+3*（2buf[$i]{10}）和0x07）；
$Locals\u end=strlen（$this->BUF[$i]）-$Locals\u str-1；
$Locals\u tmp=substr（$this->BUF[$i]，$Locals\u str，$Locals\u end）；
$Global_len=2buf[0]{10}和0x07）；
$Locals_len=2buf[$i]{10}）和0x07）；
$Global_rgb=substr（$this->BUF[0]，13，
3*（2 BUF[0]{10}和0x07））；
$Locals\u rgb=substr（$this->BUF[$i]，13，
3*（2个BUF[$i]{10}和0x07））；
$Locals\u ext=“！\xF9\x04”.chr（（$this->DIS>0）和0xFF）.chr（（$d>>8）和0xFF）。“\x0\x0”；
if（$this->COL>-1&&ord（$this->BUF[$i]{10}）&0x80）{
对于（$j=0；$j<（2buf[$i]{10}）和0x07））；$j++）{
如果(
ord（$this->COL>>16）和0xFF）&&
ord（$this->COL>>8）和0xFF）&&
ord（$this->COL>>0）和0xFF）
$gif = new GIFEncoder (
// 1. frames
array('1.gif', '2.gif', '3.gif'),
// 2. speed - array for frames or number
//array(500,500,500),
20,
// 3. loops - number or false
0,
// 4. disposal ??? - what is it?
2,
// 5-7. transparent RGB
0,0,0,
// 8. padding array with point(x,y) or 0
array(
array(0,50),
array(0,0)
),
// 9. source 'url' or 'bin'
"url"
);