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Fix MapCanvas#drawImage (#11865)

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Warrior 2025-01-07 13:54:34 +01:00 committed by GitHub
parent 486e521105
commit 337557044e
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1 changed files with 33 additions and 15 deletions
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48
paper-server/src/main/java/org/bukkit/craftbukkit/map/CraftMapCanvas.java
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@ -3,6 +3,7 @@ package org.bukkit.craftbukkit.map;
import com.google.common.base.Preconditions;
import java.awt.Color;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.util.Arrays;
import org.bukkit.map.MapCanvas;
import org.bukkit.map.MapCursorCollection;
@ -92,22 +93,33 @@ public class CraftMapCanvas implements MapCanvas {
@Override
public void drawImage(int x, int y, Image image) {
// Paper start - Reduce work done by limiting size of image and using System.arraycopy
int width = 128 - x;
int height = 128 - y;
if (image.getHeight(null) < height)
height = image.getHeight(null);
final int imageWidth = image.getWidth(null);
final int imageHeight = image.getHeight(null);
// The source x value *may* be negative, meaning we'd need to "offset" the source image before drawing it.
final int sourceX = Math.max(-x, 0);
final int sourceY = Math.max(-y, 0);
final int destX = Math.max(x, 0);
final int destY = Math.max(y, 0);
// The effective width/height to draw on the canvas.
final int effectiveWidth = Math.min(imageWidth - sourceX, 128 - destX);
final int effectiveHeight = Math.min(imageHeight - sourceY, 128 - destY);
if (effectiveWidth <= 0 || effectiveHeight <= 0)
return;
// Create a subimage if the image is larger than the max allowed size
java.awt.image.BufferedImage temp;
if (image.getWidth(null) >= width && image instanceof java.awt.image.BufferedImage bImage) {
BufferedImage temp;
if (imageWidth >= effectiveWidth && image instanceof BufferedImage bImage) {
// If the image is larger than the max allowed size, get a subimage, otherwise use the image as is
if (image.getWidth(null) > width || image.getHeight(null) > height) {
temp = bImage.getSubimage(0, 0, width, height);
if (imageWidth > effectiveWidth || imageHeight > effectiveHeight) {
temp = bImage.getSubimage(sourceX, sourceY, effectiveWidth, effectiveHeight);
} else {
temp = bImage;
}
} else {
temp = new java.awt.image.BufferedImage(width, height, java.awt.image.BufferedImage.TYPE_INT_ARGB);
temp = new BufferedImage(effectiveWidth, effectiveHeight, BufferedImage.TYPE_INT_ARGB);
java.awt.Graphics2D graphics = temp.createGraphics();
graphics.drawImage(image, 0, 0, null);
graphics.dispose();
@ -117,14 +129,20 @@ public class CraftMapCanvas implements MapCanvas {
// Since we now control the size of the image, we can safely use System.arraycopy
// If x is 0, we can just copy the entire image as width is 128 and height is <=(128-y)
if (x == 0) {
System.arraycopy(bytes, 0, this.buffer, y * 128, width * height);
return;
if (x == 0 && effectiveWidth == 128) { // This only works great if the width is 128, otherwise an empty area appears
System.arraycopy(bytes, 0, this.buffer, destY * effectiveWidth, effectiveWidth * effectiveHeight);
} else {
for (int yToCopy = 0; yToCopy < effectiveHeight; ++yToCopy) {
final int src = yToCopy * effectiveWidth;
final int dest = (destY + yToCopy) * 128 + destX;
System.arraycopy(bytes, src, this.buffer, dest, effectiveWidth);
}
}
for (int y2 = 0; y2 < height; ++y2) {
System.arraycopy(bytes, 0, this.buffer, (y + y2) * 128 + x, width);
}
// Mark all colors within the image as dirty
this.mapView.worldMap.setColorsDirty(destX, destY);
this.mapView.worldMap.setColorsDirty(destX + effectiveWidth - 1, destY + effectiveHeight - 1);
// Paper end
}