/*** 生成gif动画的代码* 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 $dl[$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 global_color_table_sizecode;if($this->buffer[4] & 0x80) {$this->getbytes((3 * $this->global_color_table_size));for($i = 0; $i 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 $this->getbytes(3 * $size);for($i = 0; $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; $i {$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; $i if($outtable[3 * $i] == $this->trans1 && $outtable [3 * $i + 1] == $this->trans2 && $outtable [3 * $i + 2] == $this->trans3) {break;}}if($i $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 $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; $i if($s{$i} != $b{$i}) {return false;}}return true;}function getbytes($l) {for($i = 0; $i if($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 $this->fout .= pack('c*', $s[$i]);}}function getanimation() {return $this->fout;}}?>
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