119 lines
5.2 KiB
PHP
119 lines
5.2 KiB
PHP
<?php
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//////////////////////////////////////////////////////////////
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/// phpThumb() by James Heinrich <info@silisoftware.com> //
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// available at http://phpthumb.sourceforge.net ///
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//////////////////////////////////////////////////////////////
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/// //
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// phpthumb.ico.php - .ICO output format functions //
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// ///
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//////////////////////////////////////////////////////////////
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class phpthumb_ico {
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function phpthumb_ico() {
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return true;
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}
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function GD2ICOstring(&$gd_image_array) {
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foreach ($gd_image_array as $key => $gd_image) {
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$ImageWidths[$key] = ImageSX($gd_image);
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$ImageHeights[$key] = ImageSY($gd_image);
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$bpp[$key] = ImageIsTrueColor($gd_image) ? 32 : 24;
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$totalcolors[$key] = ImageColorsTotal($gd_image);
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$icXOR[$key] = '';
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for ($y = $ImageHeights[$key] - 1; $y >= 0; $y--) {
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for ($x = 0; $x < $ImageWidths[$key]; $x++) {
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$argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
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$a = round(255 * ((127 - $argb['alpha']) / 127));
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$r = $argb['red'];
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$g = $argb['green'];
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$b = $argb['blue'];
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if ($bpp[$key] == 32) {
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$icXOR[$key] .= chr($b).chr($g).chr($r).chr($a);
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} elseif ($bpp[$key] == 24) {
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$icXOR[$key] .= chr($b).chr($g).chr($r);
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}
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if ($a < 128) {
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@$icANDmask[$key][$y] .= '1';
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} else {
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@$icANDmask[$key][$y] .= '0';
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}
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}
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// mask bits are 32-bit aligned per scanline
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while (strlen($icANDmask[$key][$y]) % 32) {
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$icANDmask[$key][$y] .= '0';
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}
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}
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$icAND[$key] = '';
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foreach ($icANDmask[$key] as $y => $scanlinemaskbits) {
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for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8) {
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$icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT)));
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}
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}
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}
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foreach ($gd_image_array as $key => $gd_image) {
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$biSizeImage = $ImageWidths[$key] * $ImageHeights[$key] * ($bpp[$key] / 8);
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// BITMAPINFOHEADER - 40 bytes
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$BitmapInfoHeader[$key] = '';
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$BitmapInfoHeader[$key] .= "\x28\x00\x00\x00"; // DWORD biSize;
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$BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($ImageWidths[$key], 4); // LONG biWidth;
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// The biHeight member specifies the combined
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// height of the XOR and AND masks.
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$BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($ImageHeights[$key] * 2, 4); // LONG biHeight;
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$BitmapInfoHeader[$key] .= "\x01\x00"; // WORD biPlanes;
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$BitmapInfoHeader[$key] .= chr($bpp[$key])."\x00"; // wBitCount;
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$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biCompression;
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$BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($biSizeImage, 4); // DWORD biSizeImage;
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$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // LONG biXPelsPerMeter;
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$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // LONG biYPelsPerMeter;
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$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biClrUsed;
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$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biClrImportant;
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}
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$icondata = "\x00\x00"; // idReserved; // Reserved (must be 0)
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$icondata .= "\x01\x00"; // idType; // Resource Type (1 for icons)
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$icondata .= phpthumb_functions::LittleEndian2String(count($gd_image_array), 2); // idCount; // How many images?
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$dwImageOffset = 6 + (count($gd_image_array) * 16);
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foreach ($gd_image_array as $key => $gd_image) {
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// ICONDIRENTRY idEntries[1]; // An entry for each image (idCount of 'em)
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$icondata .= chr($ImageWidths[$key]); // bWidth; // Width, in pixels, of the image
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$icondata .= chr($ImageHeights[$key]); // bHeight; // Height, in pixels, of the image
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$icondata .= chr($totalcolors[$key]); // bColorCount; // Number of colors in image (0 if >=8bpp)
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$icondata .= "\x00"; // bReserved; // Reserved ( must be 0)
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$icondata .= "\x01\x00"; // wPlanes; // Color Planes
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$icondata .= chr($bpp[$key])."\x00"; // wBitCount; // Bits per pixel
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$dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]);
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$icondata .= phpthumb_functions::LittleEndian2String($dwBytesInRes, 4); // dwBytesInRes; // How many bytes in this resource?
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$icondata .= phpthumb_functions::LittleEndian2String($dwImageOffset, 4); // dwImageOffset; // Where in the file is this image?
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$dwImageOffset += strlen($BitmapInfoHeader[$key]);
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$dwImageOffset += strlen($icXOR[$key]);
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$dwImageOffset += strlen($icAND[$key]);
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}
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foreach ($gd_image_array as $key => $gd_image) {
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$icondata .= $BitmapInfoHeader[$key];
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$icondata .= $icXOR[$key];
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$icondata .= $icAND[$key];
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}
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return $icondata;
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}
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}
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?>
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