From efc2b515f46c3cd053a6de3935d3235a76b08a71 Mon Sep 17 00:00:00 2001
From: David Manthey <david.manthey@kitware.com>
Date: Fri, 3 Jan 2025 11:40:43 -0500
Subject: [PATCH] fix: Fix pixelmap parameters for images smaller than tiles

Fix an issue when generating pixelmap parameters for images smaller than
tiles.  Specifically, if an image was small (say 100 x 100) and claimed
to be tiled where the tiles where more than twice the size of the image
(say 1024 x 1024), the minimum tile level was not set appropriately for
the tile layer, and, if corrected, the url could ask for a negative z
level.  If negative z levels are ever desired, this would need to
change.
---
 src/osmLayer.js      | 2 +-
 src/pixelmapLayer.js | 2 +-
 src/tileLayer.js     | 2 +-
 src/util/common.js   | 1 +
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/osmLayer.js b/src/osmLayer.js
index b5e3abaabe..69621124a9 100644
--- a/src/osmLayer.js
+++ b/src/osmLayer.js
@@ -79,7 +79,7 @@ var osmLayer = function (arg) {
       overlap: m_this._options.tileOverlap,
       scale: m_this._options.tileScale,
       url: m_this._options.url.call(
-        m_this, urlParams.x, urlParams.y, urlParams.level || 0,
+        m_this, urlParams.x, urlParams.y, Math.max(urlParams.level || 0, 0),
         m_this._options.subdomains),
       crossDomain: m_this._options.crossDomain
     });
diff --git a/src/pixelmapLayer.js b/src/pixelmapLayer.js
index 1eb11ae0c7..5c093c2d31 100644
--- a/src/pixelmapLayer.js
+++ b/src/pixelmapLayer.js
@@ -81,7 +81,7 @@ var pixelmapLayer = function (arg) {
       overlap: m_this._options.tileOverlap,
       scale: m_this._options.tileScale,
       url: m_this._options.url.call(
-        m_this, urlParams.x, urlParams.y, urlParams.level || 0,
+        m_this, urlParams.x, urlParams.y, Math.max(urlParams.level || 0, 0),
         m_this._options.subdomains),
       crossDomain: m_this._options.crossDomain
     });
diff --git a/src/tileLayer.js b/src/tileLayer.js
index 9372d9ac4f..d92df745bf 100644
--- a/src/tileLayer.js
+++ b/src/tileLayer.js
@@ -601,7 +601,7 @@ var tileLayer = function (arg) {
       size: {x: m_this._options.tileWidth, y: m_this._options.tileHeight},
       queue: m_this._queue,
       url: m_this._options.url.call(
-        m_this, urlParams.x, urlParams.y, urlParams.level || 0,
+        m_this, urlParams.x, urlParams.y, Math.max(urlParams.level || 0, 0),
         m_this._options.subdomains)
     });
   };
diff --git a/src/util/common.js b/src/util/common.js
index ad09023d8a..630ae0be52 100644
--- a/src/util/common.js
+++ b/src/util/common.js
@@ -569,6 +569,7 @@ var util = {
     };
     var layerParams = {
       maxLevel: maxLevel,
+      minLevel: Math.min(0, maxLevel),
       wrapX: false,
       wrapY: false,
       tileOffset: function () {