* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
+//From http://www.programmierer-forum.de/imagebmp-gute-funktion-gefunden-t143716.htm
+if ( ! function_exists( 'imagebmp') ) {
+ function imagebmp($im, $filename='', $bit=24, $compression=0) {
+ // version 1.00
+ if (!in_array($bit, array(1, 4, 8, 16, 24, 32))) {
+ $bit = 24;
+ }
+ else if ($bit == 32) {
+ $bit = 24;
+ }
+ $bits = pow(2, $bit);
+ imagetruecolortopalette($im, true, $bits);
+ $width = imagesx($im);
+ $height = imagesy($im);
+ $colors_num = imagecolorstotal($im);
+ $rgb_quad = '';
+ if ($bit <= 8) {
+ for ($i = 0; $i < $colors_num; $i++) {
+ $colors = imagecolorsforindex($im, $i);
+ $rgb_quad .= chr($colors['blue']) . chr($colors['green']) . chr($colors['red']) . "\0";
+ }
+ $bmp_data = '';
+ if ($compression == 0 || $bit < 8) {
+ $compression = 0;
+ $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 .= $extra;
+ }
+ }
+ // RLE8
+ else if ($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 {
+ $extra = '';
+ $padding = 4 - ($width * ($bit / 8)) % 4;
+ if ($padding % 4 != 0) {
+ $extra = str_repeat("\0", $padding);
+ }
+ $bmp_data = '';
+ for ($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']);
+ }
+ }
+ $bmp_data .= $extra;
+ }
+ $size_quad = 0;
+ $size_data = strlen($bmp_data);
+ $colors_num = 0;
+ }
+ $file_header = 'BM' . pack('V3', 54 + $size_quad + $size_data, 0, 54 + $size_quad);
+ $info_header = pack('V3v2V*', 0x28, $width, $height, 1, $bit, $compression, $size_data, 0, 0, $colors_num, 0);
+ if ($filename != '') {
+ $fp = fopen($filename, 'wb');
+ fwrite($fp, $file_header . $info_header . $rgb_quad . $bmp_data);
+ fclose($fp);
+ return true;
+ }
+ echo $file_header . $info_header. $rgb_quad . $bmp_data;
+ return true;
+ }
+}
+
//From user comments at http://dk2.php.net/manual/en/function.exif-imagetype.php
if ( ! function_exists( 'exif_imagetype' ) ) {
class OC_Image {
protected $resource = false; // tmp resource.
protected $imagetype = IMAGETYPE_PNG; // Default to png if file type isn't evident.
+ protected $bit_depth = 24;
protected $filepath = null;
/**
$retval = imagexbm($this->resource, $filepath);
break;
case IMAGETYPE_WBMP:
- case IMAGETYPE_BMP:
$retval = imagewbmp($this->resource, $filepath);
break;
+ case IMAGETYPE_BMP:
+ $retval = imagebmp($this->resource, $filepath, $this->bit_depth);
+ break;
default:
$retval = imagepng($this->resource, $filepath);
}
}
break;
case IMAGETYPE_WBMP:
- case IMAGETYPE_BMP:
if (imagetypes() & IMG_WBMP) {
$this->resource = imagecreatefromwbmp($imagepath);
} else {
- OC_Log::write('core', 'OC_Image->loadFromFile, (W)BMP images not supported: '.$imagepath, OC_Log::DEBUG);
+ OC_Log::write('core', 'OC_Image->loadFromFile, WBMP images not supported: '.$imagepath, OC_Log::DEBUG);
}
break;
+ case IMAGETYPE_BMP:
+ $this->resource = $this->imagecreatefrombmp($imagepath);
+ break;
/*
case IMAGETYPE_TIFF_II: // (intel byte order)
break;
}
}
+ //From http://www.programmierer-forum.de/function-imagecreatefrombmp-laeuft-mit-allen-bitraten-t143137.htm
+ private function imagecreatefrombmp($filename) {
+ // version 1.00
+ if (!($fh = fopen($filename, 'rb'))) {
+ trigger_error('imagecreatefrombmp: Can not open ' . $filename, E_USER_WARNING);
+ return false;
+ }
+ // read file header
+ $meta = unpack('vtype/Vfilesize/Vreserved/Voffset', fread($fh, 14));
+ // check for bitmap
+ if ($meta['type'] != 19778) {
+ trigger_error('imagecreatefrombmp: ' . $filename . ' is not a bitmap!', E_USER_WARNING);
+ return false;
+ }
+ // read image header
+ $meta += unpack('Vheadersize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vcolors/Vimportant', fread($fh, 40));
+ // read additional 16bit header
+ if ($meta['bits'] == 16) {
+ $meta += unpack('VrMask/VgMask/VbMask', fread($fh, 12));
+ }
+ // set bytes and padding
+ $meta['bytes'] = $meta['bits'] / 8;
+ $this->bit_depth = $meta['bits'];
+ $meta['decal'] = 4 - (4 * (($meta['width'] * $meta['bytes'] / 4)- floor($meta['width'] * $meta['bytes'] / 4)));
+ if ($meta['decal'] == 4) {
+ $meta['decal'] = 0;
+ }
+ // obtain imagesize
+ if ($meta['imagesize'] < 1) {
+ $meta['imagesize'] = $meta['filesize'] - $meta['offset'];
+ // in rare cases filesize is equal to offset so we need to read physical size
+ if ($meta['imagesize'] < 1) {
+ $meta['imagesize'] = @filesize($filename) - $meta['offset'];
+ if ($meta['imagesize'] < 1) {
+ trigger_error('imagecreatefrombmp: Can not obtain filesize of ' . $filename . '!', E_USER_WARNING);
+ return false;
+ }
+ }
+ }
+ // calculate colors
+ $meta['colors'] = !$meta['colors'] ? pow(2, $meta['bits']) : $meta['colors'];
+ // read color palette
+ $palette = array();
+ if ($meta['bits'] < 16) {
+ $palette = unpack('l' . $meta['colors'], fread($fh, $meta['colors'] * 4));
+ // in rare cases the color value is signed
+ if ($palette[1] < 0) {
+ foreach ($palette as $i => $color) {
+ $palette[$i] = $color + 16777216;
+ }
+ }
+ }
+ // create gd image
+ $im = imagecreatetruecolor($meta['width'], $meta['height']);
+ $data = fread($fh, $meta['imagesize']);
+ $p = 0;
+ $vide = chr(0);
+ $y = $meta['height'] - 1;
+ $error = 'imagecreatefrombmp: ' . $filename . ' has not enough data!';
+ // loop through the image data beginning with the lower left corner
+ while ($y >= 0) {
+ $x = 0;
+ while ($x < $meta['width']) {
+ switch ($meta['bits']) {
+ case 32:
+ case 24:
+ if (!($part = substr($data, $p, 3))) {
+ trigger_error($error, E_USER_WARNING);
+ return $im;
+ }
+ $color = unpack('V', $part . $vide);
+ break;
+ case 16:
+ if (!($part = substr($data, $p, 2))) {
+ trigger_error($error, E_USER_WARNING);
+ return $im;
+ }
+ $color = unpack('v', $part);
+ $color[1] = (($color[1] & 0xf800) >> 8) * 65536 + (($color[1] & 0x07e0) >> 3) * 256 + (($color[1] & 0x001f) << 3);
+ break;
+ case 8:
+ $color = unpack('n', $vide . substr($data, $p, 1));
+ $color[1] = $palette[ $color[1] + 1 ];
+ break;
+ case 4:
+ $color = unpack('n', $vide . substr($data, floor($p), 1));
+ $color[1] = ($p * 2) % 2 == 0 ? $color[1] >> 4 : $color[1] & 0x0F;
+ $color[1] = $palette[ $color[1] + 1 ];
+ break;
+ case 1:
+ $color = unpack('n', $vide . substr($data, floor($p), 1));
+ switch (($p * 8) % 8) {
+ case 0:
+ $color[1] = $color[1] >> 7;
+ break;
+ case 1:
+ $color[1] = ($color[1] & 0x40) >> 6;
+ break;
+ case 2:
+ $color[1] = ($color[1] & 0x20) >> 5;
+ break;
+ case 3:
+ $color[1] = ($color[1] & 0x10) >> 4;
+ break;
+ case 4:
+ $color[1] = ($color[1] & 0x8) >> 3;
+ break;
+ case 5:
+ $color[1] = ($color[1] & 0x4) >> 2;
+ break;
+ case 6:
+ $color[1] = ($color[1] & 0x2) >> 1;
+ break;
+ case 7:
+ $color[1] = ($color[1] & 0x1);
+ break;
+ }
+ $color[1] = $palette[ $color[1] + 1 ];
+ break;
+ default:
+ trigger_error('imagecreatefrombmp: ' . $filename . ' has ' . $meta['bits'] . ' bits and this is not supported!', E_USER_WARNING);
+ return false;
+ }
+ imagesetpixel($im, $x, $y, $color[1]);
+ $x++;
+ $p += $meta['bytes'];
+ }
+ $y--;
+ $p += $meta['decal'];
+ }
+ fclose($fh);
+ return $im;
+ }
+
/**
* @brief Resizes the image preserving ratio.
* @param $maxsize The maximum size of either the width or height.
projects / nextcloud-server.git / commitdiff