note 90116 added to function.imagecreate
| From: | AzKalor at osu1 dot php dot net | Date: | Tue, 07 Apr 2009 11:28:00 +0000 |
| Subject: | note 90116 added to function.imagecreate | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-152885@lists.php.net to get a copy of this message | ||
added fixes from gpanz.blogspot.com to original function ImageCreateFromBMP from DHKold
<?php
/*********************************************/
/* Fonction: ImageCreateFromBMP */
/* Author: DHKold */
/* Contact: admin@dhkold.com */
/* Date: The 7th of April 2009 */
/* Version: 2.0C */
/*********************************************/
function ImageCreateFromBMP($filename) {
//Ouverture du fichier en mode binaire
if (!$f1 = fopen($filename, "rb"))
return FALSE;
//1 : Chargement des ent�tes FICHIER
$FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1, 14));
if ($FILE['file_type'] != 19778)
return FALSE;
//2 : Chargement des ent�tes BMP
$BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel' .
'/Vcompression/Vsize_bitmap/Vhoriz_resolution' .
'/Vvert_resolution/Vcolors_used/Vcolors_important', fread($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;
//3 : Chargement des couleurs de la palette
$PALETTE = array ();
if ($BMP['colors'] < 16777216 && $BMP['colors'] != 65536)
$PALETTE = unpack('V' . $BMP['colors'], fread($f1, $BMP['colors'] *
4));
//4 : Cr�ation de l'image
$IMG = fread($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) {
$COLOR = unpack("v",substr($IMG,$P,2));
$blue = (($COLOR[1] & 0x001f) << 3) + 7;
$green = (($COLOR[1] & 0x03e0) >> 2) + 7;
$red = (($COLOR[1] & 0xfc00) >> 7) + 7;
$COLOR[1] = $red * 65536 + $green * 256 + $blue;
}
elseif ($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 += $BMP['decal'];
}
//Fermeture du fichier
fclose($f1);
return $res;
}
?>
----
Server IP: 212.124.37.9
Probable Submitter: 92.198.39.50
----
Manual Page -- http://www.php.net/manual/en/function.imagecreate.php
Edit -- https://master.php.net/note/edit/90116
Del: integrated -- https://master.php.net/note/delete/90116/integrated
Del: useless -- https://master.php.net/note/delete/90116/useless
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Del: non-english -- https://master.php.net/note/delete/90116/non-english
Del: in docs -- https://master.php.net/note/delete/90116/in+docs
Del: other reasons-- https://master.php.net/note/delete/90116
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