ecshop后台添加商品相册的时候bmp格式的无法生成缩略图
ecshop后台批量生成图片商品相册的时候bmp格式的无法生成缩略图求怎么解决？ 我想达到的效果就是能够生成bmp格式的图片！ ecshop bmp
[解决办法]
ecshop本身不支持bmp图像生成缩微图。你要先转换为gif/jpg/png其中一种
[解决办法]
你可下载一个 ImageCreateFromBMP.php
然后改一下你的程序
[解决办法]
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 ;
$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'];
}
// Fermeture du fichier
fclose ( $f1 );
return $res ;
}