From e63f69152a12a79064ecdd07e09a5ef143913763 Mon Sep 17 00:00:00 2001
From: Diject <alexkozlovv@gmail.com>
Date: Fri, 2 Jan 2026 20:43:40 +0300
Subject: [PATCH] Add background color export to map info files

---
 apps/openmw/mapextractor.cpp       |  3 +++
 apps/openmw/mwrender/globalmap.cpp | 23 ++++++++++++++++-------
 apps/openmw/mwrender/globalmap.hpp |  4 ++++
 apps/openmw/mwworld/worldimp.cpp   |  2 ++
 4 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/apps/openmw/mapextractor.cpp b/apps/openmw/mapextractor.cpp
index ef44a15d45..0e6163e41c 100644
--- a/apps/openmw/mapextractor.cpp
+++ b/apps/openmw/mapextractor.cpp
@@ -182,6 +182,8 @@ namespace OMW
             return;
         }
 
+        osg::Vec3f bgColor = mGlobalMap->getBackgroundColor();
+
         file << "width: " << width << "\n";
         file << "height: " << height << "\n";
         file << "pixelsPerCell: 32\n";
@@ -192,6 +194,7 @@ namespace OMW
         file << "  min: " << minY << "\n";
         file << "  max: " << maxY << "\n";
         file << "file: \"map.png\"\n";
+        file << "bColor: [" << bgColor.x() << ", " << bgColor.y() << ", " << bgColor.z() << "]\n";
 
         file.close();
 
diff --git a/apps/openmw/mwrender/globalmap.cpp b/apps/openmw/mwrender/globalmap.cpp
index 20128ff837..efccc6080a 100644
--- a/apps/openmw/mwrender/globalmap.cpp
+++ b/apps/openmw/mwrender/globalmap.cpp
@@ -199,12 +199,11 @@ namespace MWRender
                                 int texelX = (x - mMinX) * mCellSize + cellX;
                                 int texelY = (y - mMinY) * mCellSize + cellY;
 
-                                int lutIndex = 0;
-                                osg::Vec4 color = mColorLut->getColor(lutIndex, 0);
+                                osg::Vec4 color = mColorLut->getColor(0, 0);
                                 image->setColor(color, texelX, texelY);
 
                                 // Set alpha based on lutIndex threshold
-                                osg::Vec4 alpha(0.0f, 0.0f, 0.0f, lutIndex < 128 ? 0.0f : 1.0f);
+                                osg::Vec4 alpha(0.0f, 0.0f, 0.0f, 0.0f);
                                 alphaImage->setColor(alpha, texelX, texelY);
                             }
                         }
@@ -319,17 +318,17 @@ namespace MWRender
         // Load color LUT texture
         constexpr VFS::Path::NormalizedView colorLutPath("textures/omw_map_color_palette.dds");
         auto resourceSystem = MWBase::Environment::get().getResourceSystem();
-        osg::ref_ptr<osg::Image> colorLut = resourceSystem->getImageManager()->getImage(colorLutPath);
+        mColorLut = resourceSystem->getImageManager()->getImage(colorLutPath);
 
         // Validate LUT dimensions
-        if (!colorLut || colorLut->s() != 256 || colorLut->t() != 1)
+        if (!mColorLut || mColorLut->s() != 256 || mColorLut->t() != 1)
         {
             throw std::runtime_error("Global map color LUT must be 256x1 pixels, got "
-                + std::to_string(colorLut ? colorLut->s() : 0) + "x" + std::to_string(colorLut ? colorLut->t() : 0));
+                + std::to_string(mColorLut ? mColorLut->s() : 0) + "x" + std::to_string(mColorLut ? mColorLut->t() : 0));
         }
 
         mWorkItem = new CreateMapWorkItem(
-            mWidth, mHeight, mMinX, mMinY, mMaxX, mMaxY, cellSize, esmStore.get<ESM::Land>(), colorLut);
+            mWidth, mHeight, mMinX, mMinY, mMaxX, mMaxY, cellSize, esmStore.get<ESM::Land>(), mColorLut);
         mWorkQueue->addWorkItem(mWorkItem);
     }
 
@@ -674,4 +673,14 @@ namespace MWRender
         mWritePng = new WritePng(new osg::Image(*mOverlayImage, osg::CopyOp::DEEP_COPY_ALL));
         mWorkQueue->addWorkItem(mWritePng, /*front=*/true);
     }
+
+    osg::Vec3f GlobalMap::getBackgroundColor() const
+    {
+        if (mColorLut)
+        {
+            osg::Vec4 color = mColorLut->getColor(0, 0);
+            return osg::Vec3f(color.r(), color.g(), color.b());
+        }
+        return osg::Vec3f(0.0f, 0.0f, 0.0f);
+    }
 }
diff --git a/apps/openmw/mwrender/globalmap.hpp b/apps/openmw/mwrender/globalmap.hpp
index 07d7731e31..c643ca4eb0 100644
--- a/apps/openmw/mwrender/globalmap.hpp
+++ b/apps/openmw/mwrender/globalmap.hpp
@@ -74,6 +74,8 @@ namespace MWRender
 
         void asyncWritePng();
 
+        osg::Vec3f getBackgroundColor() const;
+
     private:
         struct WritePng;
 
@@ -121,6 +123,8 @@ namespace MWRender
         // CPU copy of overlay
         osg::ref_ptr<osg::Image> mOverlayImage;
 
+        osg::ref_ptr<osg::Image> mColorLut;
+
         osg::ref_ptr<SceneUtil::WorkQueue> mWorkQueue;
         osg::ref_ptr<CreateMapWorkItem> mWorkItem;
         osg::ref_ptr<WritePng> mWritePng;
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index ee8f39f5dc..6d1dc6b338 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -4159,6 +4159,8 @@ namespace MWWorld
         infoFile << "  min: " << minY << "\n";
         infoFile << "  max: " << maxY << "\n";
         infoFile << "file: \"tilemap.png\"\n";
+        infoFile << "bColor: [" << backgroundColor.x() << ", " << backgroundColor.y() << ", " << backgroundColor.z()
+                 << "]\n";
 
         infoFile.close();