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