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- <?php
- function ImageCreateFromBMP($filename)
- {
- if (! $f1 = fopen($filename,"rb")) return FALSE;
- $FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1,14));
- if ($FILE['file_type'] != 19778) return FALSE;
- $BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel'.
- '/Vcompression/Vsize_bitmap/Vhoriz_resolution'.
- '/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1,40));
- $BMP['colors'] = pow(2,$BMP['bits_per_pixel']);
- if ($BMP['size_bitmap'] == 0) $BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
- $BMP['bytes_per_pixel'] = $BMP['bits_per_pixel']/8;
- $BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
- $BMP['decal'] = ($BMP['width']*$BMP['bytes_per_pixel']/4);
- $BMP['decal'] -= floor($BMP['width']*$BMP['bytes_per_pixel']/4);
- $BMP['decal'] = 4-(4*$BMP['decal']);
- if ($BMP['decal'] == 4) $BMP['decal'] = 0;
- $PALETTE = array();
- if ($BMP['colors'] < 16777216)
- {
- $PALETTE = unpack('V'.$BMP['colors'], fread($f1,$BMP['colors']*4));
- }
- $IMG = fread($f1,$BMP['size_bitmap']);
- $VIDE = chr(0);
- $res = imagecreatetruecolor($BMP['width'],$BMP['height']);
- $P = 0;
- $Y = $BMP['height']-1;
- while ($Y >= 0)
- {
- $X=0;
- while ($X < $BMP['width'])
- {
- if ($BMP['bits_per_pixel'] == 24)
- $COLOR = unpack("V",substr($IMG,$P,3).$VIDE);
- elseif ($BMP['bits_per_pixel'] == 16)
- {
- $COLOR = unpack("n",substr($IMG,$P,2));
- $COLOR[1] = $PALETTE[$COLOR[1]+1];
- }
- elseif ($BMP['bits_per_pixel'] == 8)
- {
- $COLOR = unpack("n",$VIDE.substr($IMG,$P,1));
- $COLOR[1] = $PALETTE[$COLOR[1]+1];
- }
- elseif ($BMP['bits_per_pixel'] == 4)
- {
- $COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
- if (($P*2)%2 == 0) $COLOR[1] = ($COLOR[1] >> 4) ; else $COLOR[1] = ($COLOR[1] & 0x0F);
- $COLOR[1] = $PALETTE[$COLOR[1]+1];
- }
- elseif ($BMP['bits_per_pixel'] == 1)
- {
- $COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
- if (($P*8)%8 == 0) $COLOR[1] = $COLOR[1] >>7;
- elseif (($P*8)%8 == 1) $COLOR[1] = ($COLOR[1] & 0x40)>>6;
- elseif (($P*8)%8 == 2) $COLOR[1] = ($COLOR[1] & 0x20)>>5;
- elseif (($P*8)%8 == 3) $COLOR[1] = ($COLOR[1] & 0x10)>>4;
- elseif (($P*8)%8 == 4) $COLOR[1] = ($COLOR[1] & 0x8)>>3;
- elseif (($P*8)%8 == 5) $COLOR[1] = ($COLOR[1] & 0x4)>>2;
- elseif (($P*8)%8 == 6) $COLOR[1] = ($COLOR[1] & 0x2)>>1;
- elseif (($P*8)%8 == 7) $COLOR[1] = ($COLOR[1] & 0x1);
- $COLOR[1] = $PALETTE[$COLOR[1]+1];
- }
- else
- return FALSE;
- imagesetpixel($res,$X,$Y,$COLOR[1]);
- $X++;
- $P += $BMP['bytes_per_pixel'];
- }
- $Y--;
- $P+=$BMP['decal'];
- }
- fclose($f1);
- return $res;
- }
- ?>
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