<?
function ConvertBMP2GD($src, $dest = false) {
if(!($src_f = fopen($src, "rb"))) {
return false;
}
if(!($dest_f = fopen($dest, "wb"))) {
return false;
}
$header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f,
14));
$info = unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vimportant",
fread($src_f, 40));

extract($info);
extract($header);

if($type != 0x4D42) { // signature "BM"
return false;
}

$palette_size = $offset - 54;
$ncolor = $palette_size / 4;
$gd_header = "";
// true-color vs. palette
$gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF";
$gd_header .= pack("n2", $width, $height);
$gd_header .= ($palette_size == 0) ? "\x01" : "\x00";
if($palette_size) {
$gd_header .= pack("n", $ncolor);
}
// no transparency
$gd_header .= "\xFF\xFF\xFF\xFF";

fwrite($dest_f, $gd_header);

if($palette_size) {
$palette = fread($src_f, $palette_size);
$gd_palette = "";
$j = 0;
while($j < $palette_size) {
$b = $palette{$j++};
$g = $palette{$j++};
$r = $palette{$j++};
$a = $palette{$j++};
$gd_palette .= "$r$g$b$a";
}
$gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor);
fwrite($dest_f, $gd_palette);
}

$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size &
0x03) : 0;

for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
// BMP stores scan lines starting from bottom
fseek($src_f, $offset + (($scan_line_size + $scan_line_align) *
$l));
$scan_line = fread($src_f, $scan_line_size);
if($bits == 24) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$b = $scan_line{$j++};
$g = $scan_line{$j++};
$r = $scan_line{$j++};
$gd_scan_line .= "\x00$r$g$b";
}
}
else if($bits == 8) {
$gd_scan_line = $scan_line;
}
else if($bits == 4) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr($byte >> 4);
$p2 = chr($byte & 0x0F);
$gd_scan_line .= "$p1$p2";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}
else if($bits == 1) {
$gd_scan_line = "";
$j = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = chr((int) (($byte & 0x80) != 0));
$p2 = chr((int) (($byte & 0x40) != 0));
$p3 = chr((int) (($byte & 0x20) != 0));
$p4 = chr((int) (($byte & 0x10) != 0));
$p5 = chr((int) (($byte & 0x08) != 0));
$p6 = chr((int) (($byte & 0x04) != 0));
$p7 = chr((int) (($byte & 0x02) != 0));
$p8 = chr((int) (($byte & 0x01) != 0));
$gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8";
} $gd_scan_line = substr($gd_scan_line, 0, $width);
}

fwrite($dest_f, $gd_scan_line);
}
fclose($src_f);
fclose($dest_f);
return true;
}

function imagecreatefrombmp($filename) {
$tmp_name = tempnam("/tmp", "GD");
if(ConvertBMP2GD($filename, $tmp_name)) {
$img = imagecreatefromgd($tmp_name);
unlink($tmp_name);
return $img;
} return false;
}

///////////////////////////////////////////////////////////////////

$obrazek = $_GET["url"];
$max_szerokosc = $_GET["s"];
$max_wysokosc = $_GET["w"];

if (!$max_szerokosc) $max_szerokosc = 1000;
if (!$max_wysokosc) $max_wysokosc = 1000;

$obrazek .= ".";

if (file_exists($obrazek."gif")) {
	$obrazek = $obrazek."gif";
	$format = "gif";
} elseif (file_exists($obrazek."png")) {
	$obrazek = $obrazek."png";
	$format = "png";
} elseif (file_exists($obrazek."jpg")) {
	$obrazek = $obrazek."jpg";
	$format = "jpg";
} elseif (file_exists($obrazek."bmp")) {
	$img = imagecreatefrombmp($obrazek."bmp");
	imagejpeg($img, $obrazek."jpg");
	$obrazek = $obrazek."jpg";
	$format = "jpg";
}

$rozmiar = GetImageSize($obrazek);
$szerokosc = $rozmiar[0];
$wysokosc = $rozmiar[1];

$wspolczynnik_x = $max_szerokosc / $szerokosc;
$wspolczynnik_y = $max_wysokosc / $wysokosc;

if ($wysokosc > ($szerokosc * $max_wysokosc/$max_szerokosc)) {
	$nowa_szerokosc = $szerokosc;
	$nowa_wysokosc = floor($szerokosc * $max_wysokosc/$max_szerokosc);
} else {
	$nowa_wysokosc = $wysokosc;
	$nowa_szerokosc = floor($wysokosc * $max_szerokosc/$max_wysokosc);
}

if ($format == "jpg")  {
	$zrd = ImageCreateFromJpeg($obrazek);
} elseif ($format == "gif")  {
	$zrd = ImageCreateFromGif($obrazek);
} elseif ($format == "png")  {
	$zrd = ImageCreateFromPng($obrazek);
}

$prz = ImageCreateTrueColor($max_szerokosc, $max_wysokosc);
ImageCopyResized($prz, $zrd, 0, 0, 0, 0, $max_szerokosc, $max_wysokosc, $nowa_szerokosc, $nowa_wysokosc);
header("Content-type: Image/$format");
ImageJpeg($prz, null, 100);
ImageDestroy($zrd);
ImageDestroy($prz);
?>