<?php
/*
	[Destoon B2B System] Copyright (c) 2008-2015 www.destoon.com
	This is NOT a freeware, use is subject to license.txt
*/
defined('IN_DESTOON') or exit('Access Denied');
function bmp2gd($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) return false;
	$palette_size = $offset-54;
	$ncolor = $palette_size/4;
	$gd_header = "";
	$gd_header .= ($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);
	$gd_header .= "\xFF\xFF\xFF\xFF";
	fwrite($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++, $l--) {
		fseek($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) {
	$tmp_name = tempnam("tmp", "BMP");
	if(bmp2gd($filename, $tmp_name)) {
		$img = imagecreatefromgd($tmp_name);
		unlink($tmp_name);
		return $img;
	}
	return false;
}
?>