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如何在php中生成gif动画?

2016-03-06 16:13:11 来源:www.45fan.com 【

如何在php中生成gif动画?

首先需要确认GD库是否正常,如果是合成图片,请确保把分解的图片放在frames的文件夹里面。
GIFEncoder.class.php 类

<? 
Class GIFEncoder { 
  var $GIF = "GIF89a";    /* GIF header 6 bytes  */ 
  var $VER = "GIFEncoder V2.06";  /* Encoder version    */ 
 
  var $BUF = Array ( ); 
  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' =>"Could 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_mod 
            ) { 
    if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_tim ) ) { 
      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; 
        } 
      } 
    } 
    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  ); 
      $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 >> 0 ) & 0xFF && 
            ord ( $Locals_rgb { 3 * $j + 1 } ) == ( $this->COL >> 8 ) & 0xFF && 
            ord ( $Locals_rgb { 3 * $j + 2 } ) == ( $this->COL >> 16 ) & 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 { 
          $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... 
  :: 
  */ 
  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 ); 
  } 
} 
 
?> 

为大家分享两个实例供大家参考:

实例 1 合成gif动画:

<?php 
include "GIFEncoder.class.php"; 
/* 
 Build a frames array from sources... 
*/ 
if ( $dh = opendir ( "frames/" ) ) { 
 while ( false !== ( $dat = readdir ( $dh ) ) ) { 
  if ( $dat != "." && $dat != ".." ) { 
   $frames [ ] = "frames/$dat"; 
   $framed [ ] = 5; 
  } 
 } 
 closedir ( $dh ); 
} 
/* 
  GIFEncoder constructor: 
  ======================= 
 
  image_stream = new GIFEncoder ( 
       URL or Binary data 'Sources' 
       int     'Delay times' 
       int     'Animation loops' 
       int     'Disposal' 
       int     'Transparent red, green, blue colors' 
       int     'Source type' 
      ); 
*/ 
$gif = new GIFEncoder ( 
   $frames, 
   $framed, 
   0, 
   2, 
   0, 0, 0, 
   "url" 
  ); 
/* 
  Possibles outputs: 
  ================== 
 
  Output as GIF for browsers : 
   - Header ( 'Content-type:image/gif' ); 
  Output as GIF for browsers with filename: 
   - Header ( 'Content-disposition:Attachment;filename=myanimation.gif'); 
  Output as file to store into a specified file: 
   - FWrite ( FOpen ( "myanimation.gif", "wb" ), $gif->GetAnimation ( ) ); 
*/ 
Header ( 'Content-type:image/gif' ); 
echo $gif->GetAnimation ( ); 
?> 

实例 2 创建gif动画:

<?php 
include "GIFEncoder.class.php"; 
 
ob_start(); 
$board_width = 60; 
$board_height = 60; 
$pad_width = 5; 
$pad_height = 15; 
$ball_size = 5; 
$game_width = $board_width - $pad_width*2 - $ball_size; 
$game_height = $board_height-$ball_size; 
 
$x = 0; 
$y = rand(0,$game_height); 
$xv = rand(1,10); 
$yv = rand(1,10); 
$pt[] = array($x,$y); 
do{ 
  $x += $xv; 
  $y += $yv; 
  if($x > $game_width){ 
    $xv = -1*$xv; 
    $x = $game_width - ($x-$game_width); 
  }elseif($x < 0){ 
    $xv = -1*$xv; 
    $x = abs($x); 
  } 
  if($y>$game_height){ 
    $yv = -1*$yv; 
    $y = $game_height - ($y - $game_height); 
  }elseif($y<0){ 
    $yv = -1*$yv; 
    $y = abs($y); 
  } 
  $pt[] = array($x,$y); 
}while($x!=$pt[0][0]||$y!=$pt[0][1]); 
 
$i = 0; 
while(isset($pt[$i])){ 
  $image = imagecreate($board_width,$board_height); 
  imagecolorallocate($image, 0,0,0); 
  $color = imagecolorallocate($image, 255,255,255); 
  $color2 = imagecolorallocate($image, 255,0,0); 
   
  if($pt[$i][1] + $pad_height < $board_width){ 
    imagefilledrectangle($image,0,$pt[$i][1],$pad_width, $pt[$i][1]+$pad_height,$color); 
  }else{ 
    imagefilledrectangle($image,0,$board_width-$pad_height,$pad_width, $board_width,$color); 
  } 
  imagefilledrectangle($image,$board_width-$pad_width,0,$board_width, $board_height,$color2); 
  imagefilledrectangle($image,$pad_width+$pt[$i][0], $ball_size+$pt[$i][1]-$ball_size, $pad_width+$pt[$i][0]+$ball_size, $ball_size+$pt[$i][1],$color); 
  //imagesetpixel($image,$pt[$i][0],$pt[$i][1],$color); 
  imagegif($image); 
  imagedestroy($image); 
  $imagedata[] = ob_get_contents(); 
  ob_clean(); 
  ++$i; 
} 
 
$gif = new GIFEncoder( 
       $imagedata, 
       100, 
       0, 
       2, 
       0, 0, 1, 
       "bin" 
  ); 
   
Header ('Content-type:image/gif'); 
echo $gif->GetAnimation(); 
?> 

以上就是教大家如何利用php合成或是创建gif动画,希望大家仔细研究分享的两个实例,有所收获。


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Tags: PHP GIF 生成
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