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da9d110d5b
This patch does not appear to be doing anything useful, and may hide errors. Currently, the save logic does not run through this path either so it did not do anything. Additionally, properly implement support for handling RegionFileSizeException in Moonrise.
75 lines
3.7 KiB
Diff
75 lines
3.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Barnaby <22575741+barnabwhy@users.noreply.github.com>
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Date: Sat, 29 Jun 2024 12:06:51 +0100
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Subject: [PATCH] Reduce work done in CraftMapCanvas.drawImage by limiting size
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of image and using System.arraycopy instead of for loops and use bitwise
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operations to do bounds checks.
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diff --git a/src/main/java/org/bukkit/craftbukkit/map/CraftMapCanvas.java b/src/main/java/org/bukkit/craftbukkit/map/CraftMapCanvas.java
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index ff59f759669620795ef355c988b664bdcda39f52..a5e98571d6d83390761c11e28a0bc3c4415799cd 100644
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--- a/src/main/java/org/bukkit/craftbukkit/map/CraftMapCanvas.java
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+++ b/src/main/java/org/bukkit/craftbukkit/map/CraftMapCanvas.java
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@@ -91,12 +91,41 @@ public class CraftMapCanvas implements MapCanvas {
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@Override
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public void drawImage(int x, int y, Image image) {
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- byte[] bytes = MapPalette.imageToBytes(image);
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- for (int x2 = 0; x2 < image.getWidth(null); ++x2) {
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- for (int y2 = 0; y2 < image.getHeight(null); ++y2) {
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- this.setPixel(x + x2, y + y2, bytes[y2 * image.getWidth(null) + x2]);
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+ // Paper start - Reduce work done by limiting size of image and using System.arraycopy
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+ int width = 128 - x;
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+ int height = 128 - y;
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+ if (image.getHeight(null) < height)
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+ height = image.getHeight(null);
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+
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+ // Create a subimage if the image is larger than the max allowed size
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+ java.awt.image.BufferedImage temp;
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+ if (image.getWidth(null) >= width && image instanceof java.awt.image.BufferedImage bImage) {
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+ // If the image is larger than the max allowed size, get a subimage, otherwise use the image as is
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+ if (image.getWidth(null) > width || image.getHeight(null) > height) {
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+ temp = bImage.getSubimage(0, 0, width, height);
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+ } else {
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+ temp = bImage;
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}
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+ } else {
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+ temp = new java.awt.image.BufferedImage(width, height, java.awt.image.BufferedImage.TYPE_INT_ARGB);
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+ java.awt.Graphics2D graphics = temp.createGraphics();
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+ graphics.drawImage(image, 0, 0, null);
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+ graphics.dispose();
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}
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+
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+ byte[] bytes = MapPalette.imageToBytes(temp);
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+
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+ // Since we now control the size of the image, we can safely use System.arraycopy
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+ // If x is 0, we can just copy the entire image as width is 128 and height is <=(128-y)
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+ if (x == 0) {
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+ System.arraycopy(bytes, 0, this.buffer, y * 128, width * height);
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+ return;
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+ }
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+
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+ for (int y2 = 0; y2 < height; ++y2) {
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+ System.arraycopy(bytes, 0, this.buffer, (y + y2) * 128 + x, width);
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+ }
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+ // Paper end
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}
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@Override
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diff --git a/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java b/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java
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index 0cbbd915631904fe8c6effefb92895422b33eff6..cf0920e5f84b35647882fb963e9972af4e8427e0 100644
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--- a/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java
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@@ -23,8 +23,10 @@ public class CraftMapRenderer extends MapRenderer {
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@Override
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public void render(MapView map, MapCanvas canvas, Player player) {
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// Map
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- for (int x = 0; x < 128; ++x) {
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- for (int y = 0; y < 128; ++y) {
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+ // Paper start - Swap inner and outer loops here to (theoretically) improve cache locality
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+ for (int y = 0; y < 128; ++y) {
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+ for (int x = 0; x < 128; ++x) {
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+ // Paper end
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canvas.setPixel(x, y, this.worldMap.colors[y * 128 + x]);
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}
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}
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