thinkphp中上传bmp格式图片，缺少了imagecreatefrombmp()方法和imagebmp()方法，
此方法在simplewind\Core\Library\Think\Image\Driver\Gd.class.php中open（）和save时调用到，至于其他地方用到的都是相同的方法。
//打开图像open中 ???????if(‘gif‘ == $this->info[‘type‘]){ ???????????$class ?= ???‘Think\\Image\\Driver\\GIF‘; ???????????$this->gif = new $class($imgname); ???????????$this->img = imagecreatefromstring($this->gif->image()); ???????} else { ???????????$fun = "imagecreatefrom{$this->info[‘type‘]}"; ???????????$this->img = $fun($imgname); ???????}
//保存图像save中
if(‘jpeg‘ == $type || ‘jpg‘ == $type){
//JPEG图像设置隔行扫描
imageinterlace($this->img, $interlace);
imagejpeg($this->img, $imgname,$quality);
}elseif(‘gif‘ == $type && !empty($this->gif)){
$this->gif->save($imgname);
}else{
$fun = ‘image‘.$type;
$fun($this->img, $imgname);
}方法如下：下面两个函数放在admin/common的公用方法下面，使用的时候会自动调用。
/** * BMP 创建函数 * @author simon * @param string $filename path of bmp file * @example who use,who knows * @return resource of GD */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 ( $BMP[‘bits_per_pixel‘] == 32 ){ ???????????????$COLOR = unpack( "V", substr( $IMG, $P, 3 ) ); ???????????????$B = ord(substr($IMG, $P,1)); ???????????????$G = ord(substr($IMG, $P+1,1)); ???????????????$R = ord(substr($IMG, $P+2,1)); ???????????????$color = imagecolorexact( $res, $R, $G, $B ); ???????????????if ( $color == -1 ) ???????????????????$color = imagecolorallocate( $res, $R, $G, $B ); ???????????????$COLOR[0] = $R*256*256+$G*256+$B; ???????????????$COLOR[1] = $color; ???????????}elseif ( $BMP[‘bits_per_pixel‘] == 24 ) ???????????????$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;}/** * 创建bmp格式图片 * * @author: legend(legendsky@hotmail.com) * @link: http://www.ugia.cn/?p=96 * @description: create Bitmap-File with GD library * @version: 0.1 * * @param resource $im ?????????图像资源 * @param string ??$filename ???如果要另存为文件，请指定文件名，为空则直接在浏览器输出 * @param integer ?$bit ????????图像质量(1、4、8、16、24、32位) * @param integer ?$compression 压缩方式，0为不压缩，1使用RLE8压缩算法进行压缩 * * @return integer */ function imagebmp(&$im, $filename = ‘‘, $bit = 8, $compression = 0) { ????if (!in_array($bit, array(1, 4, 8, 16, 24, 32))) ????{ ????????$bit = 8; ????} ????else if ($bit == 32) // todo:32 bit ????{ ????????$bit = 24; ????} ????$bits = pow(2, $bit); ????// 调整调色板 ????imagetruecolortopalette($im, true, $bits); ????$width ?= imagesx($im); ????$height = imagesy($im); ????$colors_num = imagecolorstotal($im); ????if ($bit <= 8) ????{ ????????// 颜色索引 ????????$rgb_quad = ‘‘; ????????for ($i = 0; $i < $colors_num; $i ++) ????????{ ????????????$colors = imagecolorsforindex($im, $i); ????????????$rgb_quad .= chr($colors[‘blue‘]) . chr($colors[‘green‘]) . chr($colors[‘red‘]) . "\0"; ????????} ????????// 位图数据 ????????$bmp_data = ‘‘; ????????// 非压缩 ????????if ($compression == 0 || $bit < 8) ????????{ ????????????if (!in_array($bit, array(1, 4, 8))) ????????????{ ????????????????$bit = 8; ????????????} ????????????$compression = 0; ????????????// 每行字节数必须为4的倍数，补齐。 ????????????$extra = ‘‘; ????????????$padding = 4 - ceil($width / (8 / $bit)) % 4; ????????????if ($padding % 4 != 0) ????????????{ ????????????????$extra = str_repeat("\0", $padding); ????????????} ????????????for ($j = $height - 1; $j >= 0; $j --) ????????????{ ????????????????$i = 0; ????????????????while ($i < $width) ????????????????{ ????????????????????$bin = 0; ????????????????????$limit = $width - $i < 8 / $bit ? (8 / $bit - $width + $i) * $bit : 0; ????????????????????for ($k = 8 - $bit; $k >= $limit; $k -= $bit) ????????????????????{ ????????????????????????$index = imagecolorat($im, $i, $j); ????????????????????????$bin |= $index << $k; ????????????????????????$i ++; ????????????????????} ????????????????????$bmp_data .= chr($bin); ????????????????} ????????????????$bmp_data .= $extra; ????????????} ????????} ????????// RLE8 压缩 ????????else if ($compression == 1 && $bit == 8) ????????{ ????????????for ($j = $height - 1; $j >= 0; $j --) ????????????{ ????????????????$last_index = "\0"; ????????????????$same_num ??= 0; ????????????????for ($i = 0; $i <= $width; $i ++) ????????????????{ ????????????????????$index = imagecolorat($im, $i, $j); ????????????????????if ($index !== $last_index || $same_num > 255) ????????????????????{ ????????????????????????if ($same_num != 0) ????????????????????????{ ????????????????????????????$bmp_data .= chr($same_num) . chr($last_index); ????????????????????????} ????????????????????????$last_index = $index; ????????????????????????$same_num = 1; ????????????????????} ????????????????????else ????????????????????{ ????????????????????????$same_num ++; ????????????????????} ????????????????} ????????????????$bmp_data .= "\0\0"; ????????????} ????????????$bmp_data .= "\0\1"; ????????} ????????$size_quad = strlen($rgb_quad); ????????$size_data = strlen($bmp_data); ????} ????else ????{ ????????// 每行字节数必须为4的倍数，补齐。 ????????$extra = ‘‘; ????????$padding = 4 - ($width * ($bit / 8)) % 4; ????????if ($padding % 4 != 0) ????????{ ????????????$extra = str_repeat("\0", $padding); ????????} ????????// 位图数据 ????????$bmp_data = ‘‘; ????????for ($j = $height - 1; $j >= 0; $j --) ????????{ ????????????for ($i = 0; $i < $width; $i ++) ????????????{ ????????????????$index ?= imagecolorat($im, $i, $j); ????????????????$colors = imagecolorsforindex($im, $index); ????????????????if ($bit == 16) ????????????????{ ????????????????????$bin = 0 << $bit; ????????????????????$bin |= ($colors[‘red‘] >> 3) << 10; ????????????????????$bin |= ($colors[‘green‘] >> 3) << 5; ????????????????????$bin |= $colors[‘blue‘] >> 3; ????????????????????$bmp_data .= pack("v", $bin); ????????????????} ????????????????else ????????????????{ ????????????????????$bmp_data .= pack("c*", $colors[‘blue‘], $colors[‘green‘], $colors[‘red‘]); ????????????????} ????????????????// todo: 32bit; ????????????} ????????????$bmp_data .= $extra; ????????} ????????$size_quad = 0; ????????$size_data = strlen($bmp_data); ????????$colors_num = 0; ????} ????// 位图文件头 ????$file_header = "BM" . pack("V3", 54 + $size_quad + $size_data, 0, 54 + $size_quad); ????// 位图信息头 ????$info_header = pack("V3v2V*", 0x28, $width, $height, 1, $bit, $compression, $size_data, 0, 0, $colors_num, 0); ????// 写入文件 ????if ($filename != ‘‘) ????{ ????????$fp = fopen($filename, "wb"); ????????fwrite($fp, $file_header); ????????fwrite($fp, $info_header); ????????fwrite($fp, $rgb_quad); ????????fwrite($fp, $bmp_data); ????????fclose($fp); ????????return 1; ????} ????// 浏览器输出 ????header("Content-Type: image/bmp"); ????echo $file_header . $info_header; ????echo $rgb_quad; ????echo $bmp_data; ????return 1; } 关于thinkphp上传bmp格式图片
原文地址：http://www.cnblogs.com/mu-zi/p/7488027.html