XOOPS 2.5.6  Final
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phpthumb.ico.php
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1 <?php
4 // available at http://phpthumb.sourceforge.net ///
7 // phpthumb.ico.php - .ICO output format functions //
8 // ///
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 ?>