日期:2014-05-17 浏览次数:20756 次
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 ){
$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 ;