forked from leftypol/leftypol
image handling class
This commit is contained in:
Savetheinternet
parent
2d00b32bed
commit
97979b7999
3 changed files with 373 additions and 280 deletions
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@ -1495,91 +1495,7 @@
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return "{$numerator}{$sep}{$denominator}";
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}
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/*********************************************/
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/* Fonction: imagecreatefrombmp */
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/* Author: DHKold */
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/* Contact: admin@dhkold.com */
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/* Date: The 15th of June 2005 */
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/* Version: 2.0B */
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/*********************************************/
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function imagecreatefrombmp($filename) {
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if (! $f1 = fopen($filename,"rb")) return FALSE;
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$FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1,14));
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if ($FILE['file_type'] != 19778) return FALSE;
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$BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel'.
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'/Vcompression/Vsize_bitmap/Vhoriz_resolution'.
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'/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1,40));
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$BMP['colors'] = pow(2,$BMP['bits_per_pixel']);
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if ($BMP['size_bitmap'] == 0) $BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
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$BMP['bytes_per_pixel'] = $BMP['bits_per_pixel']/8;
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$BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
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$BMP['decal'] = ($BMP['width']*$BMP['bytes_per_pixel']/4);
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$BMP['decal'] -= floor($BMP['width']*$BMP['bytes_per_pixel']/4);
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$BMP['decal'] = 4-(4*$BMP['decal']);
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if ($BMP['decal'] == 4) $BMP['decal'] = 0;
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$PALETTE = array();
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if ($BMP['colors'] < 16777216)
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{
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$PALETTE = unpack('V'.$BMP['colors'], fread($f1,$BMP['colors']*4));
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}
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$IMG = fread($f1,$BMP['size_bitmap']);
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$VIDE = chr(0);
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$res = imagecreatetruecolor($BMP['width'],$BMP['height']);
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$P = 0;
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$Y = $BMP['height']-1;
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while ($Y >= 0)
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{
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$X=0;
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while ($X < $BMP['width'])
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{
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if ($BMP['bits_per_pixel'] == 24)
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$COLOR = unpack("V",substr($IMG,$P,3).$VIDE);
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elseif ($BMP['bits_per_pixel'] == 16)
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{
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$COLOR = unpack("n",substr($IMG,$P,2));
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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elseif ($BMP['bits_per_pixel'] == 8)
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{
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$COLOR = unpack("n",$VIDE.substr($IMG,$P,1));
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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elseif ($BMP['bits_per_pixel'] == 4)
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{
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$COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
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if (($P*2)%2 == 0) $COLOR[1] = ($COLOR[1] >> 4) ; else $COLOR[1] = ($COLOR[1] & 0x0F);
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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elseif ($BMP['bits_per_pixel'] == 1)
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{
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$COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
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if (($P*8)%8 == 0) $COLOR[1] = $COLOR[1] >>7;
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elseif (($P*8)%8 == 1) $COLOR[1] = ($COLOR[1] & 0x40)>>6;
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elseif (($P*8)%8 == 2) $COLOR[1] = ($COLOR[1] & 0x20)>>5;
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elseif (($P*8)%8 == 3) $COLOR[1] = ($COLOR[1] & 0x10)>>4;
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elseif (($P*8)%8 == 4) $COLOR[1] = ($COLOR[1] & 0x8)>>3;
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elseif (($P*8)%8 == 5) $COLOR[1] = ($COLOR[1] & 0x4)>>2;
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elseif (($P*8)%8 == 6) $COLOR[1] = ($COLOR[1] & 0x2)>>1;
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elseif (($P*8)%8 == 7) $COLOR[1] = ($COLOR[1] & 0x1);
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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else
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return FALSE;
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imagesetpixel($res,$X,$Y,$COLOR[1]);
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$X++;
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$P += $BMP['bytes_per_pixel'];
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}
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$Y--;
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$P+=$BMP['decal'];
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}
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fclose($f1);
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return $res;
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}
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function getPostByHash($hash) {
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global $board;
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@ -1602,176 +1518,4 @@
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file_unlink($post['thumb']);
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}
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}
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function createimage($type, $source_pic) {
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global $config;
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$image = false;
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switch($type) {
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case 'jpg':
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case 'jpeg':
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if(!$image = @imagecreatefromjpeg($source_pic)) {
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file_unlink($source_pic);
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error($config['error']['invalidimg']);
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}
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break;
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case 'png':
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if(!$image = @imagecreatefrompng($source_pic)) {
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file_unlink($source_pic);
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error($config['error']['invalidimg']);
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}
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break;
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case 'gif':
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if(!$image = @imagecreatefromgif($source_pic)) {
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file_unlink($source_pic);
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error($config['error']['invalidimg']);
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}
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break;
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case 'bmp':
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if(!$image = @imagecreatefrombmp($source_pic)) {
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unlink($source_pic);
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file_unlink($config['error']['invalidimg']);
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}
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break;
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default:
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error($config['error']['unknownext']);
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}
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return $image;
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}
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function resize($src, $width, $height, $destination_pic, $max_width, $max_height, $ext) {
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global $config;
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$return = Array();
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$x_ratio = $max_width / $width;
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$y_ratio = $max_height / $height;
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if(($width <= $max_width) && ($height <= $max_height)) {
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$tn_width = $width;
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$tn_height = $height;
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} elseif (($x_ratio * $height) < $max_height) {
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$tn_height = ceil($x_ratio * $height);
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$tn_width = $max_width;
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} else {
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$tn_width = ceil($y_ratio * $width);
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$tn_height = $max_height;
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}
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$return['width'] = $tn_width;
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$return['height'] = $tn_height;
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$tmp = imagecreatetruecolor($tn_width, $tn_height);
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if($ext == 'png' || $ext == 'gif') {
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imagecolortransparent($tmp, imagecolorallocatealpha($tmp, 0, 0, 0, 0));
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imagesavealpha($tmp, true);
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}
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if($ext == 'png')
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imagealphablending($tmp, false);
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imagecopyresampled($tmp, $src, 0, 0, 0, 0, $tn_width, $tn_height, $width, $height);
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switch($ext) {
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case 'jpg':
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case 'jpeg':
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imagejpeg($tmp, $destination_pic);
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break;
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case 'png':
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imagepng($tmp, $destination_pic, $config['thumb_quality']);
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break;
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case 'gif':
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imagegif($tmp, $destination_pic);
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break;
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case 'bmp':
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imagebmp($tmp, $destination_pic);
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break;
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default:
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error($config['error']['unknownext']);
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}
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imagedestroy($src);
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imagedestroy($tmp);
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return $return;
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}
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function imagebmp(&$img, $filename='') {
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$widthOrig = imagesx($img);
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$widthFloor = ((floor($widthOrig/16))*16);
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$widthCeil = ((ceil($widthOrig/16))*16);
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$height = imagesy($img);
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$size = ($widthCeil*$height*3)+54;
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// Bitmap File Header
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$result = 'BM'; // header (2b)
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$result .= int_to_dword($size); // size of file (4b)
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$result .= int_to_dword(0); // reserved (4b)
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$result .= int_to_dword(54); // byte location in the file which is first byte of IMAGE (4b)
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// Bitmap Info Header
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$result .= int_to_dword(40); // Size of BITMAPINFOHEADER (4b)
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$result .= int_to_dword($widthCeil); // width of bitmap (4b)
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$result .= int_to_dword($height); // height of bitmap (4b)
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$result .= int_to_word(1); // biPlanes = 1 (2b)
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$result .= int_to_word(24); // biBitCount = {1 (mono) or 4 (16 clr ) or 8 (256 clr) or 24 (16 Mil)} (2b
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$result .= int_to_dword(0); // RLE COMPRESSION (4b)
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$result .= int_to_dword(0); // width x height (4b)
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$result .= int_to_dword(0); // biXPelsPerMeter (4b)
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$result .= int_to_dword(0); // biYPelsPerMeter (4b)
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$result .= int_to_dword(0); // Number of palettes used (4b)
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$result .= int_to_dword(0); // Number of important colour (4b)
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// is faster than chr()
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$arrChr = array();
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for($i=0; $i<256; $i++){
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$arrChr[$i] = chr($i);
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}
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// creates image data
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$bgfillcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
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// bottom to top - left to right - attention blue green red !!!
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$y=$height-1;
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for ($y2=0; $y2<$height; $y2++) {
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for ($x=0; $x<$widthFloor; ) {
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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}
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for ($x=$widthFloor; $x<$widthCeil; $x++) {
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$rgb = ($x<$widthOrig) ? imagecolorsforindex($img, imagecolorat($img, $x, $y)) : $bgfillcolor;
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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}
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$y--;
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}
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// see imagegif
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if($filename == '') {
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echo $result;
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} else {
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$file = fopen($filename, 'wb');
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fwrite($file, $result);
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fclose($file);
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}
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}
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// imagebmp helpers
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function int_to_dword($n) {
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return chr($n & 255).chr(($n >> 8) & 255).chr(($n >> 16) & 255).chr(($n >> 24) & 255);
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}
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function int_to_word($n) {
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return chr($n & 255).chr(($n >> 8) & 255);
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}
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?>
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