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Check for existence of ChunkUtils extension

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Dylan K. Taylor 2017-08-31 21:04:36 +01:00
parent ddfe828445
commit 8caabd3267
1 changed files with 72 additions and 70 deletions
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142
src/pocketmine/level/format/io/ChunkUtils.php
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@ -23,84 +23,86 @@ declare(strict_types=1);
namespace pocketmine\level\format\io; namespace pocketmine\level\format\io;
class ChunkUtils{ if(!extension_loaded('pocketmine_chunkutils')){
class ChunkUtils{
/** /**
* Re-orders a byte array (YZX -> XZY and vice versa) * Re-orders a byte array (YZX -> XZY and vice versa)
* *
* @param string $array length 4096 * @param string $array length 4096
* *
* @return string length 4096 * @return string length 4096
*/ */
final public static function reorderByteArray(string $array) : string{ final public static function reorderByteArray(string $array) : string{
$result = str_repeat("\x00", 4096); $result = str_repeat("\x00", 4096);
if($array !== $result){ if($array !== $result){
$i = 0; $i = 0;
for($x = 0; $x < 16; ++$x){ for($x = 0; $x < 16; ++$x){
$zM = $x + 256; $zM = $x + 256;
for($z = $x; $z < $zM; $z += 16){ for($z = $x; $z < $zM; $z += 16){
$yM = $z + 4096; $yM = $z + 4096;
for($y = $z; $y < $yM; $y += 256){ for($y = $z; $y < $yM; $y += 256){
$result{$i} = $array{$y}; $result{$i} = $array{$y};
++$i; ++$i;
}
}
}
}
return $result;
}
/**
* Re-orders a nibble array (YZX -> XZY and vice versa)
*
* @param string $array length 2048
* @param string $commonValue length 1 common value to fill the default array with and to expect, may improve sort time
*
* @return string length 2048
*/
final public static function reorderNibbleArray(string $array, string $commonValue = "\x00") : string{
$result = str_repeat($commonValue, 2048);
if($array !== $result){
$i = 0;
for($x = 0; $x < 8; ++$x){
for($z = 0; $z < 16; ++$z){
$zx = (($z << 3) | $x);
for($y = 0; $y < 8; ++$y){
$j = (($y << 8) | $zx);
$j80 = ($j | 0x80);
if($array{$j} === $commonValue and $array{$j80} === $commonValue){
//values are already filled
}else{
$i1 = ord($array{$j});
$i2 = ord($array{$j80});
$result{$i} = chr(($i2 << 4) | ($i1 & 0x0f));
$result{$i | 0x80} = chr(($i1 >> 4) | ($i2 & 0xf0));
} }
$i++;
} }
} }
$i += 128;
} }
return $result;
} }
return $result; /**
} * Re-orders a nibble array (YZX -> XZY and vice versa)
*
* @param string $array length 2048
* @param string $commonValue length 1 common value to fill the default array with and to expect, may improve sort time
*
* @return string length 2048
*/
final public static function reorderNibbleArray(string $array, string $commonValue = "\x00") : string{
$result = str_repeat($commonValue, 2048);
/** if($array !== $result){
* Converts pre-MCPE-1.0 biome color array to biome ID array. $i = 0;
* for($x = 0; $x < 8; ++$x){
* @param int[] $array of biome color values for($z = 0; $z < 16; ++$z){
* $zx = (($z << 3) | $x);
* @return string for($y = 0; $y < 8; ++$y){
*/ $j = (($y << 8) | $zx);
public static function convertBiomeColors(array $array) : string{ $j80 = ($j | 0x80);
$result = str_repeat("\x00", 256); if($array{$j} === $commonValue and $array{$j80} === $commonValue){
foreach($array as $i => $color){ //values are already filled
$result{$i} = chr(($color >> 24) & 0xff); }else{
$i1 = ord($array{$j});
$i2 = ord($array{$j80});
$result{$i} = chr(($i2 << 4) | ($i1 & 0x0f));
$result{$i | 0x80} = chr(($i1 >> 4) | ($i2 & 0xf0));
}
$i++;
}
}
$i += 128;
}
}
return $result;
} }
return $result;
}
/**
* Converts pre-MCPE-1.0 biome color array to biome ID array.
*
* @param int[] $array of biome color values
*
* @return string
*/
public static function convertBiomeColors(array $array) : string{
$result = str_repeat("\x00", 256);
foreach($array as $i => $color){
$result{$i} = chr(($color >> 24) & 0xff);
}
return $result;
}
}
} }