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38 lines
1.7 KiB
Diff
38 lines
1.7 KiB
Diff
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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 12:04:48 +0100
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Subject: [PATCH] Optimise color distance check in MapPalette by removing
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floating point math
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diff --git a/src/main/java/org/bukkit/map/MapPalette.java b/src/main/java/org/bukkit/map/MapPalette.java
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index c80faa079eca1564847070f0338fc98024639829..55a46db9d73885ea967ac929013906b687e476bb 100644
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--- a/src/main/java/org/bukkit/map/MapPalette.java
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+++ b/src/main/java/org/bukkit/map/MapPalette.java
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@@ -29,14 +29,19 @@ public final class MapPalette {
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}
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private static double getDistance(@NotNull Color c1, @NotNull Color c2) {
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- double rmean = (c1.getRed() + c2.getRed()) / 2.0;
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- double r = c1.getRed() - c2.getRed();
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- double g = c1.getGreen() - c2.getGreen();
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+ // Paper start - Optimize color distance calculation by removing floating point math
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+ int rsum = c1.getRed() + c2.getRed(); // Use sum instead of mean for no division
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+ int r = c1.getRed() - c2.getRed();
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+ int g = c1.getGreen() - c2.getGreen();
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int b = c1.getBlue() - c2.getBlue();
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- double weightR = 2 + rmean / 256.0;
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- double weightG = 4.0;
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- double weightB = 2 + (255 - rmean) / 256.0;
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+ // All weights are 512x their original to avoid floating point division
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+ int weightR = 1024 + rsum;
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+ int weightG = 2048;
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+ int weightB = 1024 + (255*2 - rsum);
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+
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+ // Division by 256 here is unnecessary as this won't change the result of the sort
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return weightR * r * r + weightG * g * g + weightB * b * b;
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+ // Paper end
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}
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@NotNull
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