-
- /**
- * Code to generate gif animation
- * edit bbs.it-home.org
- */
- class GifMerge {
- var $ver = '1.1';
- var $dly = 50;
- var $mod = 'C_FILE';
- var $first = true;
- var $use_loop = false;
- var $transparent = false;
- var $use_global_in = false;
- var $x = 0;
- var $y = 0;
- var $ch = 0;
- var $fin = 0;
- var $fout = '';
- var $loop = 0;
- var $delay = 0;
- var $width = 0;
- var $height = 0;
- var $trans1 = 255;
- var $trans2 = 255;
- var $trans3 = 255;
- var $disposal = 2;
- var $out_color_table_size = 0;
- var $local_color_table_flag = 0;
- var $global_color_table_size = 0;
- var $out_color_table_sizecode = 0;
- var $global_color_table_sizecode= 0;
- var $gif = array(0x47, 0x49, 0x46);
- var $buffer = array();
- var $local_in = array();
- var $global_in = array();
- var $global_out = array();
- var $logical_screen_descriptor = array();
- function GifMerge($images, $t1, $t2, $t3, $loop, $dl, $xpos, $ypos, $model) {
- if($model) {
- $this->mod = $model;
- }
- if($loop > -1) {
- $this->loop = floor($loop - 1);
- $this->use_loop = true;
- }
- if($t1 > -1 && $t2 > -1 && $t3 > -1) {
- $this->trans1 = $t1;
- $this->trans2 = $t2;
- $this->trans3 = $t3;
- $this->transparent = true;
- }
- for($i = 0; $i < count($images); $i++) {
- $dl[$i] ? $this->delay = $dl[$i] : $this->delay = $this->dly;
- $xpos[$i] ? $this->x = $xpos[$i] : $this->x = 0;
- $ypos[$i] ? $this->y = $ypos[$i] : $this->y = 0;
- $this->start_gifmerge_process($images[$i]);
- }
- $this->fout .= "/x3b";
- }
- function start_gifmerge_process($fp) {
- if($this->mod == 'C_FILE') {
- if(!$this->fin = fopen($fp, 'rb')) {
- return;
- }
- } elseif($this->mod == 'C_MEMORY') {
- $this->ch = 0;
- $this->fin = $fp;
- }
- $this->getbytes(6);
- if(!$this->arrcmp($this->buffer, $this->gif, 3)) {
- return;
- }
- $this->getbytes(7);
- if($this->first) $this->logical_screen_descriptor = $this->buffer;
- $this->global_color_table_sizecode = $this->buffer[4] & 0x07;
- $this->global_color_table_size = 2 << $this->global_color_table_sizecode;
- if($this->buffer[4] & 0x80) {
- $this->getbytes((3 * $this->global_color_table_size));
- for($i = 0; $i < ((3 * $this->global_color_table_size)); $i++) {
- $this->global_in[$i] = $this->buffer[$i];
- }
- if($this->out_color_table_size == 0) {
- $this->out_color_table_size = $this->global_color_table_size;
- $out_color_table_sizecode = $this->global_color_table_sizecode;
- $this->global_out = $this->global_in;
- }
- if($this->global_color_table_size != $this->out_color_table_size || $this->arrcmp($this->global_out, $this->global_in, (3 * $this->global_color_table_size))) {
- $this->use_global_in = true;
- }
- }
- for($loop = true; $loop;) {
- $this->getbytes(1);
- switch($this->buffer[0]) {
- case 0x21:
- $this->read_extension();
- break;
- case 0x2c:
- $this->read_image_descriptor();
- break;
- case 0x3b:
- $loop = false;
- break;
- default:
- $loop = false;
- }
- }
- if($this->mod == 'C_FILE') {
- fclose($this->fin);
- }
- }
- function read_image_descriptor() {
- $this->getbytes(9);
- $head = $this->buffer;
- $this->local_color_table_flag = ($this->buffer[8] & 0x80) ? true : false;
- if($this->local_color_table_flag) {
- $sizecode = $this->buffer[8] & 0x07;
- $size = 2 << $sizecode;
- $this->getbytes(3 * $size);
- for($i = 0; $i < (3 * $size); $i++) {
- $this->local_in[$i] = $this->buffer[$i];
- }
- if($this->out_color_table_size == 0) {
- $this->out_color_table_size = $size;
- $out_color_table_sizecode = $sizecode;
- for($i = 0; $i < (3 * $size); $i++)
- {
- $this->global_out[$i] = $this->local_in[$i];
- }
- }
- }
- if($this->first) {
- $this->first = false;
- $this->fout .= "/x47/x49/x46/x38/x39/x61";
- if($this->width && $this->height) {
- $this->logical_screen_descriptor[0] = $this->width & 0xFF;
- $this->logical_screen_descriptor[1] = ($this->width & 0xFF00) >> 8;
- $this->logical_screen_descriptor[2] = $this->height & 0xFF;
- $this->logical_screen_descriptor[3] = ($this->height & 0xFF00) >> 8;
- }
- $this->logical_screen_descriptor[4] |= 0x80;
- $this->logical_screen_descriptor[5] &= 0xF0;
- $this->logical_screen_descriptor[6] |= $this->out_color_table_sizecode;
- $this->putbytes($this->logical_screen_descriptor, 7);
- $this->putbytes($this->global_out, ($this->out_color_table_size * 3));
- if($this->use_loop) {
- $ns[0] = 0x21;
- $ns[1] = 0xFF;
- $ns[2] = 0x0B;
- $ns[3] = 0x4e;
- $ns[4] = 0x45;
- $ns[5] = 0x54;
- $ns[6] = 0x53;
- $ns[7] = 0x43;
- $ns[8] = 0x41;
- $ns[9] = 0x50;
- $ns[10] = 0x45;
- $ns[11] = 0x32;
- $ns[12] = 0x2e;
- $ns[13] = 0x30;
- $ns[14] = 0x03;
- $ns[15] = 0x01;
- $ns[16] = $this->loop & 255;
- $ns[17] = $this->loop >> 8;
- $ns[18] = 0x00;
- $this->putbytes($ns, 19);
- }
- }
- if($this->use_global_in) {
- $outtable = $this->global_in;
- $outsize = $this->global_color_table_size;
- $outsizecode = $this->global_color_table_sizecode;
- } else {
- $outtable = $this->global_out;
- $outsize = $this->out_color_table_size;
- }
- if($this->local_color_table_flag) {
- if($size == $this->out_color_table_size && !$this->arrcmp($this->local_in, $this->global_out, $size)) {
- $outtable = $global_out;
- $outsize = $this->out_color_table_size;
- } else {
- $outtable = $this->local_in;
- $outsize = $size;
- $outsizecode = $sizecode;
- }
- }
- $use_trans = false;
- if($this->transparent) {
- for($i = 0; $i < $outsize; $i++) {
- if($outtable[3 * $i] == $this->trans1 && $outtable [3 * $i + 1] == $this->trans2 && $outtable [3 * $i + 2] == $this->trans3) {
- break;
- }
- }
- if($i < $outsize) {
- $transindex = $i;
- $use_trans = true;
- }
- }
- if($this->delay || $use_trans) {
- $this->buffer[0] = 0x21;
- $this->buffer[1] = 0xf9;
- $this->buffer[2] = 0x04;
- $this->buffer[3] = ($this->disposal << 2) + ($use_trans ? 1 : 0);
- $this->buffer[4] = $this->delay & 0xff;
- $this->buffer[5] = ($this->delay & 0xff00) >> 8;
- $this->buffer[6] = $use_trans ? $transindex : 0;
- $this->buffer[7] = 0x00;
- $this->putbytes($this->buffer,8);
- }
- $this->buffer[0] = 0x2c;
- $this->putbytes($this->buffer,1);
- $head[0] = $this->x & 0xff;
- $head[1] = ($this->x & 0xff00) >> 8;
- $head[2] = $this->y & 0xff;
- $head[3] = ($this->y & 0xff00) >> 8;
- $head[8] &= 0x40;
- if($outtable != $this->global_out) {
- $head[8] |= 0x80;
- $head[8] |= $outsizecode;
- }
- $this->putbytes($head,9);
- if($outtable != $this->global_out) {
- $this->putbytes($outtable, (3 * $outsize));
- }
- $this->getbytes(1);
- $this->putbytes($this->buffer,1);
- for(;;) {
- $this->getbytes(1);
- $this->putbytes($this->buffer,1);
- if(($u = $this->buffer[0]) == 0) {
- break;
- }
- $this->getbytes($u);
- $this->putbytes($this->buffer, $u);
- }
- }
- function read_extension() {
- $this->getbytes(1);
- switch($this->buffer[0]) {
- case 0xf9:
- $this->getbytes(6);
- break;
- case 0xfe:
- for(;;) {
- $this->getbytes(1);
- if(($u = $this->buffer[0]) == 0) {
- break;
- }
- $this->getbytes($u);
- }
- break;
- case 0x01:
- $this->getbytes(13);
- for(;;) {
- $this->getbytes(0);
- if(($u = $this->buffer[0]) == 0) {
- break;
- }
- $this->getbytes($u);
- }
- break;
- case 0xff:
- $this->getbytes(9);
- $this->getbytes(3);
- for(;;) {
- $this->getbytes(1);
- if(!$this->buffer[0]) {
- break;
- }
- $this->getbytes($this->buffer[0]);
- }
- break;
- default:
- for(;;) {
- $this->getbytes(1);
- if(!$this->buffer[0]) {
- break;
- }
- $this->getbytes($this->buffer[0]);
- }
- }
- }
- function arrcmp($b, $s, $l) {
- for($i = 0; $i < $l; $i++) {
- if($s{$i} != $b{$i}) {
- return false;
- }
- }
- return true;
- }
- function getbytes($l) {
- for($i = 0; $i < $l; $i++) {
- if($this->mod == 'C_FILE') {
- $bin = unpack('C*', fread($this->fin, 1));
- $this->buffer[$i] = $bin[1];
- } elseif($this->mod == 'C_MEMORY') {
- $bin = unpack('C*', substr($this->fin, $this->ch, 1));
- $this->buffer[$i] = $bin[1];
- $this->ch++;
- }
- }
- return $this->buffer;
- }
- function putbytes($s, $l) {
- for($i = 0; $i < $l; $i++) {
- $this->fout .= pack('C*', $s[$i]);
- }
- }
- function getAnimation() {
- return $this->fout;
- }
- }
- ?>
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