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favicon.php
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favicon.php
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<?php
$output = "";
if ($_FILES['upimage'] != '') {
if (isset($_FILES['upimage']['tmp_name']) && $_FILES['upimage']['tmp_name'] && is_uploaded_file($_FILES['upimage']['tmp_name'])) {
$fileext = array("image/jpg", "image/jpeg", "image/png", "image/pjpeg", "image/gif", "image/x-png");
if (!in_array($_FILES['upimage']['type'], $fileext)) {
$typeinfo = "图片格式错误！目前仅支持jpg，gif，png格式的图片。";
} else {
if ($_FILES['upimage']['size'] > 1024000) {
$typeinfo = "图片尺寸超出限制！请确保图片大小在1MB以内。";
} else {
if ($im = @imagecreatefrompng($_FILES['upimage']['tmp_name']) or $im = @imagecreatefromgif($_FILES['upimage']['tmp_name']) or $im = @imagecreatefromjpeg($_FILES['upimage']['tmp_name'])) {
$imginfo = @getimagesize($_FILES['upimage']['tmp_name']);
if (!is_array($imginfo)) {
$typeinfo = "格式转换失败！请检测源文件无误后重试。";
}
switch ($_POST['size']) {
case 1:
$resize_im = @imagecreatetruecolor(16, 16);
$size = 16;
break;
case 2:
$resize_im = @imagecreatetruecolor(32, 32);
$size = 32;
break;
case 3:
$resize_im = @imagecreatetruecolor(48, 48);
$size = 48;
break;
case 4:
$resize_im = @imagecreatetruecolor(64, 64);
$size = 64;
break;
case 5:
$resize_im = @imagecreatetruecolor(128, 128);
$size = 128;
break;
case 6:
$resize_im = @imagecreatetruecolor(256, 256);
$size = 256;
break;
default:
$resize_im = @imagecreatetruecolor(64, 64);
$size = 64;
break;
}
// 保留透明背景
imagealphablending($resize_im, false);
imagesavealpha($resize_im, true);
$trans_color = imagecolorallocatealpha($resize_im, 0, 0, 0, 127);
imagefill($resize_im, 0, 0, $trans_color);
imagecopyresampled($resize_im, $im, 0, 0, 0, 0, $size, $size, $imginfo[0], $imginfo[1]);
// phpthumb_ico是生成ICO图标的类
class phpthumb_ico
{
function phpthumb_ico()
{
return true;
}
function GD2ICOstring(&$gd_image_array)
{
$icANDmask = array();
foreach ($gd_image_array as $key => $gd_image) {
$ImageWidths[$key] = ImageSX($gd_image);
$ImageHeights[$key] = ImageSY($gd_image);
$bpp[$key] = ImageIsTrueColor($gd_image) ? 32 : 24;
$totalcolors[$key] = ImageColorsTotal($gd_image);
$icXOR[$key] = '';
for ($y = $ImageHeights[$key] - 1; $y >= 0; $y--) {
for ($x = 0; $x < $ImageWidths[$key]; $x++) {
$argb = $this->GetPixelColor($gd_image, $x, $y);
$a = round(255 * ((127 - $argb['alpha']) / 127));
$r = $argb['red'];
$g = $argb['green'];
$b = $argb['blue'];
if ($bpp[$key] == 32) {
$icXOR[$key] .= chr($b) . chr($g) . chr($r) . chr($a);
} else if ($bpp[$key] == 24) {
$icXOR[$key] .= chr($b) . chr($g) . chr($r);
}
if ($a < 128) {
@$icANDmask[$key][$y] .= '1';
} else {
@$icANDmask[$key][$y] .= '0';
}
}
// mask bits are 32-bit aligned per scanline
while (strlen($icANDmask[$key][$y]) % 32) {
$icANDmask[$key][$y] .= '0';
}
}
$icAND[$key] = '';
foreach ($icANDmask[$key] as $y => $scanlinemaskbits) {
for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8) {
$icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT)));
}
}
}
foreach ($gd_image_array as $key => $gd_image) {
$biSizeImage = $ImageWidths[$key] * $ImageHeights[$key] * ($bpp[$key] / 8);
// Bitmap Info Header - 40 bytes
$BitmapInfoHeader[$key] = '';
$BitmapInfoHeader[$key] .= "\x28\x00\x00\x00"; // DWORD biSize;
$BitmapInfoHeader[$key] .= $this->LittleEndian2String($ImageWidths[$key], 4); // LONG biWidth;
// The biHeight member specifies the combined
// height of the XOR and AND masks.
$BitmapInfoHeader[$key] .= $this->LittleEndian2String($ImageHeights[$key] * 2, 4); // LONG biHeight;
$BitmapInfoHeader[$key] .= "\x01\x00"; // WORD biPlanes;
$BitmapInfoHeader[$key] .= chr($bpp[$key]) . "\x00"; // wBitCount;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biCompression;
$BitmapInfoHeader[$key] .= $this->LittleEndian2String($biSizeImage, 4); // DWORD biSizeImage;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // LONG biXPelsPerMeter;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // LONG biYPelsPerMeter;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biClrUsed;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biClrImportant;
}
$icondata = "\x00\x00"; // idReserved; // Reserved (must be 0)
$icondata .= "\x01\x00"; // idType; // Resource Type (1 for icons)
$icondata .= $this->LittleEndian2String(count($gd_image_array), 2); // idCount; // How many images?
$dwImageOffset = 6 + (count($gd_image_array) * 16);
foreach ($gd_image_array as $key => $gd_image) {
// ICONDIRENTRY idEntries[1]; // An entry for each image (idCount of 'em)
$icondata .= chr($ImageWidths[$key]); // bWidth; // Width, in pixels, of the image
$icondata .= chr($ImageHeights[$key]); // bHeight; // Height, in pixels, of the image
$icondata .= chr($totalcolors[$key]); // bColorCount; // Number of colors in image (0 if >=8bpp)
$icondata .= "\x00"; // bReserved; // Reserved ( must be 0)
$icondata .= "\x01\x00"; // wPlanes; // Color Planes
$icondata .= chr($bpp[$key]) . "\x00"; // wBitCount; // Bits per pixel
$dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]);
$icondata .= $this->LittleEndian2String($dwBytesInRes, 4); // dwBytesInRes; // How many bytes in this resource?
$icondata .= $this->LittleEndian2String($dwImageOffset, 4); // dwImageOffset; // Where in the file is this image?
$dwImageOffset += strlen($BitmapInfoHeader[$key]);
$dwImageOffset += strlen($icXOR[$key]);
$dwImageOffset += strlen($icAND[$key]);
}
foreach ($gd_image_array as $key => $gd_image) {
$icondata .= $BitmapInfoHeader[$key];
$icondata .= $icXOR[$key];
$icondata .= $icAND[$key];
}
return $icondata;
}
function LittleEndian2String($number, $minbytes = 1)
{
$intstring = '';
while ($number > 0) {
$intstring = $intstring . chr($number & 255);
$number >>= 8;
}
return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
}
function GetPixelColor(&$img, $x, $y)
{
if (!is_resource($img)) {
return false;
}
return @ImageColorsForIndex($img, @ImageColorAt($img, $x, $y));
}
}
$icon = new phpthumb_ico();
$gd_image_array = array($resize_im);
$icon_data = $icon->GD2ICOstring($gd_image_array);
header("Accept-Ranges: bytes");
header("Accept-Length: " . strlen($icon_data));
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=" . 'favicon.ico');
echo $icon_data;
exit;
} else {
$typeinfo = "生成ICO图标失败！请重试。";
}
}
}
} else {
$typeinfo = "图片未上传！请选择要转换为ICO图标的文件！";
}
}
?>