mods/photo_album/classes/phpThumb_1.7.2/phpthumb.ico.php

   1 <?php
   2 //////////////////////////////////////////////////////////////
   3 ///  phpThumb() by James Heinrich <info@silisoftware.com>   //
   4 //        available at http://phpthumb.sourceforge.net     ///
   5 //////////////////////////////////////////////////////////////
   6 ///                                                         //
   7 // phpthumb.ico.php - .ICO output format functions          //
   8 //                                                         ///
   9 //////////////////////////////////////////////////////////////
  10
  11
  12 class phpthumb_ico {
  13
  14         function phpthumb_ico() {
  15                 return true;
  16         }
  17
  18
  19         function GD2ICOstring(&$gd_image_array) {
  20                 foreach ($gd_image_array as $key => $gd_image) {
  21
  22                         $ImageWidths[$key]  = ImageSX($gd_image);
  23                         $ImageHeights[$key] = ImageSY($gd_image);
  24                 $bpp[$key]          = ImageIsTrueColor($gd_image) ? 32 : 24;
  25                 $totalcolors[$key]  = ImageColorsTotal($gd_image);
  26
  27                         $icXOR[$key] = '';
  28                         for ($y = $ImageHeights[$key] - 1; $y >= 0; $y--) {
  29                                 for ($x = 0; $x < $ImageWidths[$key]; $x++) {
  30                                         $argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
  31                                         $a = round(255 * ((127 - $argb['alpha']) / 127));
  32                                         $r = $argb['red'];
  33                                         $g = $argb['green'];
  34                                         $b = $argb['blue'];
  35
  36                                         if ($bpp[$key] == 32) {
  37                                                 $icXOR[$key] .= chr($b).chr($g).chr($r).chr($a);
  38                                         } elseif ($bpp[$key] == 24) {
  39                                                 $icXOR[$key] .= chr($b).chr($g).chr($r);
  40                                         }
  41
  42                                         if ($a < 128) {
  43                                                 @$icANDmask[$key][$y] .= '1';
  44                                         } else {
  45                                                 @$icANDmask[$key][$y] .= '0';
  46                                         }
  47                                 }
  48                                 // mask bits are 32-bit aligned per scanline
  49                                 while (strlen($icANDmask[$key][$y]) % 32) {
  50                                         $icANDmask[$key][$y] .= '0';
  51                                 }
  52                         }
  53                         $icAND[$key] = '';
  54                         foreach ($icANDmask[$key] as $y => $scanlinemaskbits) {
  55                                 for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8) {
  56                                         $icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT)));
  57                                 }
  58                         }
  59
  60                 }
  61
  62             foreach ($gd_image_array as $key => $gd_image) {
  63                         $biSizeImage = $ImageWidths[$key] * $ImageHeights[$key] * ($bpp[$key] / 8);
  64
  65                 // BITMAPINFOHEADER - 40 bytes
  66                         $BitmapInfoHeader[$key]  = '';
  67                         $BitmapInfoHeader[$key] .= "\x28\x00\x00\x00";                              // DWORD  biSize;
  68                         $BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($ImageWidths[$key], 4);      // LONG   biWidth;
  69                         // The biHeight member specifies the combined
  70                         // height of the XOR and AND masks.
  71                         $BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($ImageHeights[$key] * 2, 4); // LONG   biHeight;
  72                 $BitmapInfoHeader[$key] .= "\x01\x00";                                      // WORD   biPlanes;
  73                         $BitmapInfoHeader[$key] .= chr($bpp[$key])."\x00";                          // wBitCount;
  74                         $BitmapInfoHeader[$key] .= "\x00\x00\x00\x00";                              // DWORD  biCompression;
  75                         $BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($biSizeImage, 4);            // DWORD  biSizeImage;
  76                 $BitmapInfoHeader[$key] .= "\x00\x00\x00\x00";                              // LONG   biXPelsPerMeter;
  77                 $BitmapInfoHeader[$key] .= "\x00\x00\x00\x00";                              // LONG   biYPelsPerMeter;
  78                 $BitmapInfoHeader[$key] .= "\x00\x00\x00\x00";                              // DWORD  biClrUsed;
  79                 $BitmapInfoHeader[$key] .= "\x00\x00\x00\x00";                              // DWORD  biClrImportant;
  80                 }
  81
  82
  83                 $icondata  = "\x00\x00";                                      // idReserved;   // Reserved (must be 0)
  84                 $icondata .= "\x01\x00";                                      // idType;       // Resource Type (1 for icons)
  85                 $icondata .= phpthumb_functions::LittleEndian2String(count($gd_image_array), 2);  // idCount;      // How many images?
  86
  87                 $dwImageOffset = 6 + (count($gd_image_array) * 16);
  88                 foreach ($gd_image_array as $key => $gd_image) {
  89                 // ICONDIRENTRY   idEntries[1]; // An entry for each image (idCount of 'em)
  90
  91                 $icondata .= chr($ImageWidths[$key]);                     // bWidth;          // Width, in pixels, of the image
  92                 $icondata .= chr($ImageHeights[$key]);                    // bHeight;         // Height, in pixels, of the image
  93                 $icondata .= chr($totalcolors[$key]);                     // bColorCount;     // Number of colors in image (0 if >=8bpp)
  94                 $icondata .= "\x00";                                      // bReserved;       // Reserved ( must be 0)
  95
  96                 $icondata .= "\x01\x00";                                  // wPlanes;         // Color Planes
  97                         $icondata .= chr($bpp[$key])."\x00";                      // wBitCount;       // Bits per pixel
  98
  99                         $dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]);
 100                         $icondata .= phpthumb_functions::LittleEndian2String($dwBytesInRes, 4);       // dwBytesInRes;    // How many bytes in this resource?
 101
 102                     $icondata .= phpthumb_functions::LittleEndian2String($dwImageOffset, 4);      // dwImageOffset;   // Where in the file is this image?
 103                         $dwImageOffset += strlen($BitmapInfoHeader[$key]);
 104                         $dwImageOffset += strlen($icXOR[$key]);
 105                         $dwImageOffset += strlen($icAND[$key]);
 106             }
 107
 108             foreach ($gd_image_array as $key => $gd_image) {
 109                         $icondata .= $BitmapInfoHeader[$key];
 110                         $icondata .= $icXOR[$key];
 111                         $icondata .= $icAND[$key];
 112             }
 113
 114             return $icondata;
 115         }
 116
 117 }
 118
 119 ?>