Add support for ChunkSnapshot API (CB860), maintain legacy support too
This commit is contained in:
Mike Primm
parent
dc74901638
commit
b1d1075dfe
15 changed files with 478 additions and 72 deletions
308
src/main/java/org/dynmap/utils/LegacyMapChunkCache.java
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308
src/main/java/org/dynmap/utils/LegacyMapChunkCache.java
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package org.dynmap.utils;
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import java.lang.reflect.Method;
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import java.lang.reflect.Field;
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import java.util.LinkedList;
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import org.bukkit.World;
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import org.bukkit.Chunk;
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import org.bukkit.entity.Entity;
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import org.dynmap.DynmapChunk;
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import org.dynmap.Log;
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/**
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* Container for managing chunks - dependent upon using chunk snapshots, since rendering is off server thread
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*/
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public class LegacyMapChunkCache implements MapChunkCache {
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private World w;
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private static Method getchunkdata = null;
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private static Method gethandle = null;
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private static Method poppreservedchunk = null;
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private static Field heightmap = null;
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private static boolean initialized = false;
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private int x_min, x_max, z_min, z_max;
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private int x_dim;
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private LegacyChunkSnapshot[] snaparray; /* Index = (x-x_min) + ((z-z_min)*x_dim) */
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/**
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* Iterator for traversing map chunk cache (base is for non-snapshot)
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*/
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public class OurMapIterator implements MapIterator {
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private int x, y, z;
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private LegacyChunkSnapshot snap;
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OurMapIterator(int x0, int y0, int z0) {
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initialize(x0, y0, z0);
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}
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public final void initialize(int x0, int y0, int z0) {
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this.x = x0;
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this.y = y0;
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this.z = z0;
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try {
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snap = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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} catch (ArrayIndexOutOfBoundsException aioobx) {
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snap = EMPTY;
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}
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}
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public final int getBlockTypeID() {
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return snap.getBlockTypeId(x & 0xF, y, z & 0xF);
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}
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public final int getBlockData() {
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return snap.getBlockData(x & 0xF, y, z & 0xF);
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}
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public final int getHighestBlockYAt() {
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return snap.getHighestBlockYAt(x & 0xF, z & 0xF);
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}
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public final int getBlockSkyLight() {
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return snap.getBlockSkyLight(x & 0xF, y, z & 0xF);
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}
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public final int getBlockEmittedLight() {
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return snap.getBlockEmittedLight(x & 0xF, y, z & 0xF);
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}
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public final void incrementX() {
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x++;
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if((x & 0xF) == 0) { /* Next chunk? */
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try {
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snap = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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} catch (ArrayIndexOutOfBoundsException aioobx) {
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snap = EMPTY;
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}
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}
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}
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public final void decrementX() {
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x--;
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if((x & 0xF) == 15) { /* Next chunk? */
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try {
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snap = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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} catch (ArrayIndexOutOfBoundsException aioobx) {
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snap = EMPTY;
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}
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}
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}
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public final void incrementY() {
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y++;
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}
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public final void decrementY() {
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y--;
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}
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public final void incrementZ() {
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z++;
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if((z & 0xF) == 0) { /* Next chunk? */
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try {
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snap = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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} catch (ArrayIndexOutOfBoundsException aioobx) {
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snap = EMPTY;
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}
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}
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}
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public final void decrementZ() {
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z--;
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if((z & 0xF) == 15) { /* Next chunk? */
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try {
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snap = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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} catch (ArrayIndexOutOfBoundsException aioobx) {
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snap = EMPTY;
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}
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}
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}
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public final void setY(int y) {
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this.y = y;
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}
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public final int getY() {
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return y;
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}
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}
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/**
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* Chunk cache for representing unloaded chunk
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*/
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private static class EmptyChunk implements LegacyChunkSnapshot {
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public final int getBlockTypeId(int x, int y, int z) {
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return 0;
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}
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public final int getBlockData(int x, int y, int z) {
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return 0;
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}
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public final int getBlockSkyLight(int x, int y, int z) {
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return 15;
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}
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public final int getBlockEmittedLight(int x, int y, int z) {
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return 0;
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}
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public final int getHighestBlockYAt(int x, int z) {
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return 1;
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}
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}
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private static final EmptyChunk EMPTY = new EmptyChunk();
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/**
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* Construct empty cache
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*/
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public LegacyMapChunkCache() {
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}
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/**
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* Create chunk cache container
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* @param w - world
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* @param x_min - minimum chunk x coordinate
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* @param z_min - minimum chunk z coordinate
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* @param x_max - maximum chunk x coordinate
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* @param z_max - maximum chunk z coordinate
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*/
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@SuppressWarnings({ "unchecked" })
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public void loadChunks(World w, DynmapChunk[] chunks) {
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/* Compute range */
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if(chunks.length == 0) {
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this.x_min = 0;
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this.x_max = 0;
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this.z_min = 0;
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this.z_max = 0;
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x_dim = 1;
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}
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else {
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x_min = x_max = chunks[0].x;
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z_min = z_max = chunks[0].z;
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for(int i = 1; i < chunks.length; i++) {
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if(chunks[i].x > x_max)
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x_max = chunks[i].x;
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if(chunks[i].x < x_min)
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x_min = chunks[i].x;
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if(chunks[i].z > z_max)
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z_max = chunks[i].z;
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if(chunks[i].z < z_min)
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z_min = chunks[i].z;
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}
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x_dim = x_max - x_min + 1;
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}
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this.w = w;
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if(!initialized) {
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try {
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Class c = Class.forName("net.minecraft.server.Chunk");
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getchunkdata = c.getDeclaredMethod("a", new Class[] { byte[].class, int.class,
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int.class, int.class, int.class, int.class, int.class, int.class });
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heightmap = c.getDeclaredField("h");
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c = Class.forName("org.bukkit.craftbukkit.CraftChunk");
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gethandle = c.getDeclaredMethod("getHandle", new Class[0]);
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} catch (ClassNotFoundException cnfx) {
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} catch (NoSuchMethodException nsmx) {
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} catch (NoSuchFieldException nsfx) {
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}
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/* Get CraftWorld.popPreservedChunk(x,z) - reduces memory bloat from map traversals (optional) */
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try {
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Class c = Class.forName("org.bukkit.craftbukkit.CraftWorld");
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poppreservedchunk = c.getDeclaredMethod("popPreservedChunk", new Class[] { int.class, int.class });
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} catch (ClassNotFoundException cnfx) {
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} catch (NoSuchMethodException nsmx) {
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}
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initialized = true;
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if(gethandle != null)
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Log.info("Chunk snapshot support enabled");
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else {
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Log.severe("ERROR: Chunk snapshot support not found - rendering not functiona!l");
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return;
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}
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}
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snaparray = new LegacyChunkSnapshot[x_dim * (z_max-z_min+1)];
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if(gethandle != null) {
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// Load the required chunks.
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for (DynmapChunk chunk : chunks) {
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boolean wasLoaded = w.isChunkLoaded(chunk.x, chunk.z);
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boolean didload = w.loadChunk(chunk.x, chunk.z, false);
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/* If it did load, make cache of it */
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if(didload) {
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Chunk c = w.getChunkAt(chunk.x, chunk.z);
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try {
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Object cc = gethandle.invoke(c);
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byte[] buf = new byte[32768 + 16384 + 16384 + 16384]; /* Get big enough buffer for whole chunk */
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getchunkdata.invoke(cc, buf, 0, 0, 0, 16, 128, 16, 0);
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byte[] h = (byte[])heightmap.get(cc);
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byte[] hmap = new byte[256];
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System.arraycopy(h, 0, hmap, 0, 256);
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CraftChunkSnapshot ss = new CraftChunkSnapshot(chunk.x, chunk.z, buf, hmap);
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snaparray[(chunk.x-x_min) + (chunk.z - z_min)*x_dim] = ss;
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} catch (Exception x) {
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}
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}
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if ((!wasLoaded) && didload) {
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/* It looks like bukkit "leaks" entities - they don't get removed from the world-level table
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* when chunks are unloaded but not saved - removing them seems to do the trick */
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Chunk cc = w.getChunkAt(chunk.x, chunk.z);
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if(cc != null) {
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for(Entity e: cc.getEntities())
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e.remove();
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}
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/* Since we only remember ones we loaded, and we're synchronous, no player has
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* moved, so it must be safe (also prevent chunk leak, which appears to happen
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* because isChunkInUse defined "in use" as being within 256 blocks of a player,
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* while the actual in-use chunk area for a player where the chunks are managed
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* by the MC base server is 21x21 (or about a 160 block radius) */
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w.unloadChunk(chunk.x, chunk.z, false, false);
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/* And pop preserved chunk - this is a bad leak in Bukkit for map traversals like us */
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try {
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if(poppreservedchunk != null)
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poppreservedchunk.invoke(w, chunk.x, chunk.z);
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} catch (Exception x) {
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Log.severe("Cannot pop preserved chunk - " + x.toString());
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}
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}
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}
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}
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/* Fill missing chunks with empty dummy chunk */
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for(int i = 0; i < snaparray.length; i++) {
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if(snaparray[i] == null)
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snaparray[i] = EMPTY;
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}
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}
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/**
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* Unload chunks
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*/
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public void unloadChunks() {
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if(snaparray != null) {
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for(int i = 0; i < snaparray.length; i++) {
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snaparray[i] = null;
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}
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snaparray = null;
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}
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}
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/**
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* Get block ID at coordinates
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*/
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public int getBlockTypeID(int x, int y, int z) {
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LegacyChunkSnapshot ss = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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return ss.getBlockTypeId(x & 0xF, y, z & 0xF);
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}
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/**
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* Get block data at coordiates
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*/
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public byte getBlockData(int x, int y, int z) {
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LegacyChunkSnapshot ss = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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return (byte)ss.getBlockData(x & 0xF, y, z & 0xF);
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}
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/* Get highest block Y
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*
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*/
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public int getHighestBlockYAt(int x, int z) {
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LegacyChunkSnapshot ss = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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return ss.getHighestBlockYAt(x & 0xF, z & 0xF);
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}
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/* Get sky light level
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*/
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public int getBlockSkyLight(int x, int y, int z) {
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LegacyChunkSnapshot ss = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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return ss.getBlockSkyLight(x & 0xF, y, z & 0xF);
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}
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/* Get emitted light level
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*/
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public int getBlockEmittedLight(int x, int y, int z) {
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LegacyChunkSnapshot ss = snaparray[((x>>4) - x_min) + ((z>>4) - z_min) * x_dim];
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return ss.getBlockEmittedLight(x & 0xF, y, z & 0xF);
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}
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/**
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* Get cache iterator
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*/
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public MapIterator getIterator(int x, int y, int z) {
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return new OurMapIterator(x, y, z);
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}
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}
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