Added lua bindings to toggle hot reload (disabled by default) or to trigger a reload

apps/openmw/mwlua/debugbindings.cpp

@@ -6,6 +6,10 @@
 #include "../mwbase/world.hpp"
 #include "../mwrender/renderingmanager.hpp"
 
+#include <components/resource/resourcesystem.hpp>
+#include <components/resource/scenemanager.hpp>
+#include <components/shader/shadermanager.hpp>
+
 #include <components/lua/luastate.hpp>
 
 namespace MWLua
@@ -46,6 +50,16 @@ namespace MWLua
             });
         };
 
+        api["triggerShaderReload"] = [context]()
+        {
+            MWBase::Environment::get().getWorld()->getRenderingManager()->getResourceSystem()->getSceneManager()->getShaderManager().triggerShaderReload();
+        };
+
+        api["togggleShaderHotReload"] = [context](bool value)
+        {
+            MWBase::Environment::get().getWorld()->getRenderingManager()->getResourceSystem()->getSceneManager()->getShaderManager().setHotReloadEnabled(value);
+        };
+
         return LuaUtil::makeReadOnly(api);
     }
 }

components/shader/shadermanager.cpp

@@ -367,8 +367,10 @@ namespace Shader
         std::filesystem::file_time_type mLastAutoRecompileTime;
         using KeysHolder = std::set<ShaderManager::MapKey>;
         std::unordered_map<std::string, KeysHolder> mShaderFiles;
+        bool mHotReloadEnabled;
         HotReloadManager()
         {
+            mHotReloadEnabled = false;
             mLastAutoRecompileTime = std::chrono::file_clock::now();
         }
 
@@ -392,6 +394,12 @@ namespace Shader
         }
 
         void update(ShaderManager& Manager)
+        {
+            if (mHotReloadEnabled)
+                reloadTouchedShaders(Manager);
+        }
+
+        void reloadTouchedShaders(ShaderManager& Manager)
         {
             for (auto& shader : mShaderFiles)
             {
@@ -635,4 +643,14 @@ namespace Shader
         mHotReloadManager->update(*this);
     }
 
+    void ShaderManager::setHotReloadEnabled(bool value)
+    {
+        mHotReloadManager->mHotReloadEnabled = value;
+    }
+
+    void ShaderManager::triggerShaderReload()
+    {
+        mHotReloadManager->reloadTouchedShaders(*this);
+    }
+
 }

components/shader/shadermanager.hpp

@@ -69,6 +69,8 @@ namespace Shader
         int reserveGlobalTextureUnits(Slot slot);
 
         void update();
+        void setHotReloadEnabled(bool value);
+        void triggerShaderReload();
     private:
         void getLinkedShaders(osg::ref_ptr<osg::Shader> shader, const std::vector<std::string>& linkedShaderNames, const DefineMap& defines);
         void addLinkedShaders(osg::ref_ptr<osg::Shader> shader, osg::ref_ptr<osg::Program> program);