BitStorageAlignFix.java
net.minecraft.util.datafix.fixes.BitStorageAlignFix
信息
- 全限定名：net.minecraft.util.datafix.fixes.BitStorageAlignFix
- 类型：public class
- 包：net.minecraft.util.datafix.fixes
- 源码路径：src/main/java/net/minecraft/util/datafix/fixes/BitStorageAlignFix.java
- 起始行号：L18
- 继承：DataFix
- 职责：
TODO
字段/常量
-
BIT_TO_LONG_SHIFT- 类型:
int - 修饰符:
private static final - 源码定位:
L19 - 说明:
TODO
- 类型:
-
SECTION_WIDTH- 类型:
int - 修饰符:
private static final - 源码定位:
L20 - 说明:
TODO
- 类型:
-
SECTION_HEIGHT- 类型:
int - 修饰符:
private static final - 源码定位:
L21 - 说明:
TODO
- 类型:
-
SECTION_SIZE- 类型:
int - 修饰符:
private static final - 源码定位:
L22 - 说明:
TODO
- 类型:
-
HEIGHTMAP_BITS- 类型:
int - 修饰符:
private static final - 源码定位:
L23 - 说明:
TODO
- 类型:
-
HEIGHTMAP_SIZE- 类型:
int - 修饰符:
private static final - 源码定位:
L24 - 说明:
TODO
- 类型:
内部类/嵌套类型
- 无
构造器
public BitStorageAlignFix(Schema schema) @ L26
- 构造器名：BitStorageAlignFix
- 源码定位：L26
- 修饰符：public
参数:
- schema: Schema
说明:
TODO
方法
下面的方法块按源码顺序生成。
protected TypeRewriteRule makeRule() @ L30
- 方法名：makeRule
- 源码定位：L30
- 返回类型：TypeRewriteRule
- 修饰符：protected
参数:
- 无
说明:
TODO
private Typed<?> updateHeightmaps(Typed<?> level) @ L48
- 方法名：updateHeightmaps
- 源码定位：L48
- 返回类型：Typed<?>
- 修饰符：private
参数:
- level: Typed<?>
说明:
TODO
private static Typed<?> updateSections(OpticFinder<?> sectionsFinder, OpticFinder<?> sectionFinder, OpticFinder<List<Pair<String,Dynamic<?>>>> paletteFinder, Typed<?> level) @ L57
- 方法名：updateSections
- 源码定位：L57
- 返回类型：Typed<?>
- 修饰符：private static
参数:
- sectionsFinder: OpticFinder<?>
- sectionFinder: OpticFinder<?>
- paletteFinder: OpticFinder<List<Pair<String,Dynamic<?>>>>
- level: Typed<?>
说明:
TODO
private static Dynamic<?> updateBitStorage(Dynamic<?> tag, Dynamic<?> storage, int size, int bits) @ L74
- 方法名：updateBitStorage
- 源码定位：L74
- 返回类型：Dynamic<?>
- 修饰符：private static
参数:
- tag: Dynamic<?>
- storage: Dynamic<?>
- size: int
- bits: int
说明:
TODO
public static long[] addPadding(int size, int bits, long[] data) @ L80
- 方法名：addPadding
- 源码定位：L80
- 返回类型：long[]
- 修饰符：public static
参数:
- size: int
- bits: int
- data: long[]
说明:
TODO
代码
public class BitStorageAlignFix extends DataFix {
private static final int BIT_TO_LONG_SHIFT = 6;
private static final int SECTION_WIDTH = 16;
private static final int SECTION_HEIGHT = 16;
private static final int SECTION_SIZE = 4096;
private static final int HEIGHTMAP_BITS = 9;
private static final int HEIGHTMAP_SIZE = 256;
public BitStorageAlignFix(Schema schema) {
super(schema, false);
}
@Override
protected TypeRewriteRule makeRule() {
Type<?> chunkType = this.getInputSchema().getType(References.CHUNK);
Type<?> levelType = chunkType.findFieldType("Level");
OpticFinder<?> levelFinder = DSL.fieldFinder("Level", levelType);
OpticFinder<?> sectionsFinder = levelFinder.type().findField("Sections");
Type<?> sectionType = ((ListType)sectionsFinder.type()).getElement();
OpticFinder<?> sectionFinder = DSL.typeFinder(sectionType);
Type<Pair<String, Dynamic<?>>> blockStateType = DSL.named(References.BLOCK_STATE.typeName(), DSL.remainderType());
OpticFinder<List<Pair<String, Dynamic<?>>>> paletteFinder = DSL.fieldFinder("Palette", DSL.list(blockStateType));
return this.fixTypeEverywhereTyped(
"BitStorageAlignFix",
chunkType,
this.getOutputSchema().getType(References.CHUNK),
chunk -> chunk.updateTyped(levelFinder, level -> this.updateHeightmaps(updateSections(sectionsFinder, sectionFinder, paletteFinder, level)))
);
}
private Typed<?> updateHeightmaps(Typed<?> level) {
return level.update(
DSL.remainderFinder(),
tag -> tag.update(
"Heightmaps", heightmaps -> heightmaps.updateMapValues(e -> e.mapSecond(heightmap -> updateBitStorage(tag, (Dynamic<?>)heightmap, 256, 9)))
)
);
}
private static Typed<?> updateSections(
OpticFinder<?> sectionsFinder, OpticFinder<?> sectionFinder, OpticFinder<List<Pair<String, Dynamic<?>>>> paletteFinder, Typed<?> level
) {
return level.updateTyped(
sectionsFinder,
sections -> sections.updateTyped(
sectionFinder,
section -> {
int bits = section.getOptional(paletteFinder).map(palette -> Math.max(4, DataFixUtils.ceillog2(palette.size()))).orElse(0);
return bits != 0 && !Mth.isPowerOfTwo(bits)
? section.update(DSL.remainderFinder(), tag -> tag.update("BlockStates", states -> updateBitStorage(tag, states, 4096, bits)))
: section;
}
)
);
}
private static Dynamic<?> updateBitStorage(Dynamic<?> tag, Dynamic<?> storage, int size, int bits) {
long[] input = storage.asLongStream().toArray();
long[] output = addPadding(size, bits, input);
return tag.createLongList(LongStream.of(output));
}
public static long[] addPadding(int size, int bits, long[] data) {
int dataLength = data.length;
if (dataLength == 0) {
return data;
} else {
long mask = (1L << bits) - 1L;
int valuesPerLong = 64 / bits;
int requiredLength = (size + valuesPerLong - 1) / valuesPerLong;
long[] result = new long[requiredLength];
int outputDataIndex = 0;
int outputStart = 0;
long outputData = 0L;
int currentIndex = 0;
long current = data[0];
long next = dataLength > 1 ? data[1] : 0L;
for (int index = 0; index < size; index++) {
int position = index * bits;
int startData = position >> 6;
int endData = (index + 1) * bits - 1 >> 6;
int startBit = position ^ startData << 6;
if (startData != currentIndex) {
current = next;
next = startData + 1 < dataLength ? data[startData + 1] : 0L;
currentIndex = startData;
}
long valueToInsert;
if (startData == endData) {
valueToInsert = current >>> startBit & mask;
} else {
int shiftBits = 64 - startBit;
valueToInsert = (current >>> startBit | next << shiftBits) & mask;
}
int outputEnd = outputStart + bits;
if (outputEnd >= 64) {
result[outputDataIndex++] = outputData;
outputData = valueToInsert;
outputStart = bits;
} else {
outputData |= valueToInsert << outputStart;
outputStart = outputEnd;
}
}
if (outputData != 0L) {
result[outputDataIndex] = outputData;
}
return result;
}
}
}引用的其他类
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参数
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-
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方法调用 - 关联成员:
Mth.isPowerOfTwo()
- 引用位置:
-
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参数/返回值
- 引用位置: