ShaderVisitor: support automatic recognition of normal maps based on file pattern

Introduce new settings 'auto use object normal maps', 'auto use terrain normal maps', 'normal map pattern'

apps/openmw/mwrender/renderingmanager.cpp

@@ -172,6 +172,8 @@ namespace MWRender
         resourceSystem->getSceneManager()->setForceShaders(Settings::Manager::getBool("force shaders", "Shaders"));
         resourceSystem->getSceneManager()->setClampLighting(Settings::Manager::getBool("clamp lighting", "Shaders"));
         resourceSystem->getSceneManager()->setForcePerPixelLighting(Settings::Manager::getBool("force per pixel lighting", "Shaders"));
+        resourceSystem->getSceneManager()->setAutoUseNormalMaps(Settings::Manager::getBool("auto use object normal maps", "Shaders"));
+        resourceSystem->getSceneManager()->setNormalMapPattern(Settings::Manager::getString("normal map pattern", "Shaders"));
 
         osg::ref_ptr<SceneUtil::LightManager> sceneRoot = new SceneUtil::LightManager;
         sceneRoot->setLightingMask(Mask_Lighting);
@@ -193,7 +195,8 @@ namespace MWRender
         mWater.reset(new Water(mRootNode, sceneRoot, mResourceSystem, mViewer->getIncrementalCompileOperation(), fallback, resourcePath));
 
         mTerrain.reset(new Terrain::TerrainGrid(sceneRoot, mResourceSystem, mViewer->getIncrementalCompileOperation(),
-                                                new TerrainStorage(mResourceSystem->getVFS(), false), Mask_Terrain, &mResourceSystem->getSceneManager()->getShaderManager(), mUnrefQueue.get()));
+                                                new TerrainStorage(mResourceSystem->getVFS(), Settings::Manager::getString("normal map pattern", "Shaders"), Settings::Manager::getBool("auto use terrain normal maps", "Shaders")),
+                                                    Mask_Terrain, &mResourceSystem->getSceneManager()->getShaderManager(), mUnrefQueue.get()));
 
         mCamera.reset(new Camera(mViewer->getCamera()));
 

apps/openmw/mwrender/terrainstorage.cpp

@@ -9,21 +9,9 @@
 namespace MWRender
 {
 
-    TerrainStorage::TerrainStorage(const VFS::Manager* vfs, bool preload)
-        : ESMTerrain::Storage(vfs)
+    TerrainStorage::TerrainStorage(const VFS::Manager* vfs, const std::string& normalMapPattern, bool autoUseNormalMaps)
+        : ESMTerrain::Storage(vfs, normalMapPattern, autoUseNormalMaps)
     {
-        if (preload)
-        {
-            const MWWorld::ESMStore &esmStore =
-                MWBase::Environment::get().getWorld()->getStore();
-
-            MWWorld::Store<ESM::Land>::iterator it = esmStore.get<ESM::Land>().begin();
-            for (; it != esmStore.get<ESM::Land>().end(); ++it)
-            {
-                const ESM::Land* land = &*it;
-                land->loadData(ESM::Land::DATA_VCLR|ESM::Land::DATA_VHGT|ESM::Land::DATA_VNML|ESM::Land::DATA_VTEX);
-            }
-        }
     }
 
     void TerrainStorage::getBounds(float& minX, float& maxX, float& minY, float& maxY)

apps/openmw/mwrender/terrainstorage.hpp

@@ -14,9 +14,7 @@ namespace MWRender
         virtual const ESM::LandTexture* getLandTexture(int index, short plugin);
     public:
 
-        ///@param preload Preload all Land records at startup? If using the multithreaded terrain component, this
-        /// should be set to "true" in order to avoid race conditions.
-        TerrainStorage(const VFS::Manager* vfs, bool preload);
+        TerrainStorage(const VFS::Manager* vfs, const std::string& normalMapPattern = "", bool autoUseNormalMaps = false);
 
         /// Get bounds of the whole terrain in cell units
         virtual void getBounds(float& minX, float& maxX, float& minY, float& maxY);

components/esmterrain/storage.cpp

@@ -18,8 +18,10 @@ namespace ESMTerrain
 
     const float defaultHeight = -2048;
 
-    Storage::Storage(const VFS::Manager *vfs)
+    Storage::Storage(const VFS::Manager *vfs, const std::string& normalMapPattern, bool autoUseNormalMaps)
         : mVFS(vfs)
+        , mNormalMapPattern(normalMapPattern)
+        , mAutoUseNormalMaps(autoUseNormalMaps)
     {
     }
 
@@ -511,6 +513,8 @@ namespace ESMTerrain
         info.mParallax = false;
         info.mSpecular = false;
         info.mDiffuseMap = texture;
+
+        /*
         std::string texture_ = texture;
         boost::replace_last(texture_, ".", "_nh.");
 
@@ -519,21 +523,26 @@ namespace ESMTerrain
             info.mNormalMap = texture_;
             info.mParallax = true;
         }
-        else
+        */
+        if (mAutoUseNormalMaps)
         {
-            texture_ = texture;
-            boost::replace_last(texture_, ".", "_n.");
+            std::string texture_ = texture;
+            boost::replace_last(texture_, ".", mNormalMapPattern + ".");
             if (mVFS->exists(texture_))
                 info.mNormalMap = texture_;
         }
 
-        texture_ = texture;
+        /*
+        {
+            std::string texture_ = texture;
             boost::replace_last(texture_, ".", "_diffusespec.");
             if (mVFS->exists(texture_))
             {
                 info.mDiffuseMap = texture_;
                 info.mSpecular = true;
             }
+        }
+        */
 
         mLayerInfoMap[texture] = info;
 

components/esmterrain/storage.hpp

@@ -27,7 +27,7 @@ namespace ESMTerrain
         virtual const ESM::LandTexture* getLandTexture(int index, short plugin) = 0;
 
     public:
-        Storage(const VFS::Manager* vfs);
+        Storage(const VFS::Manager* vfs, const std::string& normalMapPattern = "", bool autoUseNormalMaps = false);
 
         /// Data is loaded first, if necessary. Will return a 0-pointer if there is no data for
         /// any of the data types specified via \a flags. Will also return a 0-pointer if there
@@ -109,6 +109,9 @@ namespace ESMTerrain
         std::map<std::string, Terrain::LayerInfo> mLayerInfoMap;
         OpenThreads::Mutex mLayerInfoMutex;
 
+        std::string mNormalMapPattern;
+        bool mAutoUseNormalMaps;
+
         Terrain::LayerInfo getLayerInfo(const std::string& texture);
     };
 

components/resource/imagemanager.cpp

@@ -121,6 +121,7 @@ namespace Resource
             }
 
             osg::Image* image = result.getImage();
+            image->setFileName(normalized);
             if (!checkSupported(image, filename))
             {
                 mCache->addEntryToObjectCache(normalized, mWarningImage);

components/resource/scenemanager.cpp

@@ -212,6 +212,7 @@ namespace Resource
         , mForceShaders(false)
         , mClampLighting(false)
         , mForcePerPixelLighting(false)
+        , mAutoUseNormalMaps(false)
         , mInstanceCache(new MultiObjectCache)
         , mImageManager(imageManager)
         , mNifFileManager(nifFileManager)
@@ -235,7 +236,7 @@ namespace Resource
 
     void SceneManager::recreateShaders(osg::ref_ptr<osg::Node> node)
     {
-        Shader::ShaderVisitor shaderVisitor(*mShaderManager.get(), "objects_vertex.glsl", "objects_fragment.glsl");
+        Shader::ShaderVisitor shaderVisitor(*mShaderManager.get(), *mImageManager, "objects_vertex.glsl", "objects_fragment.glsl");
         shaderVisitor.setForceShaders(mForceShaders);
         shaderVisitor.setClampLighting(mClampLighting);
         shaderVisitor.setForcePerPixelLighting(mForcePerPixelLighting);
@@ -263,6 +264,16 @@ namespace Resource
         return mForcePerPixelLighting;
     }
 
+    void SceneManager::setAutoUseNormalMaps(bool use)
+    {
+        mAutoUseNormalMaps = use;
+    }
+
+    void SceneManager::setNormalMapPattern(const std::string &pattern)
+    {
+        mNormalMapPattern = pattern;
+    }
+
     SceneManager::~SceneManager()
     {
         // this has to be defined in the .cpp file as we can't delete incomplete types
@@ -386,10 +397,12 @@ namespace Resource
             SetFilterSettingsControllerVisitor setFilterSettingsControllerVisitor(mMinFilter, mMagFilter, mMaxAnisotropy);
             loaded->accept(setFilterSettingsControllerVisitor);
 
-            Shader::ShaderVisitor shaderVisitor(*mShaderManager.get(), "objects_vertex.glsl", "objects_fragment.glsl");
+            Shader::ShaderVisitor shaderVisitor(*mShaderManager.get(), *mImageManager, "objects_vertex.glsl", "objects_fragment.glsl");
             shaderVisitor.setForceShaders(mForceShaders);
             shaderVisitor.setClampLighting(mClampLighting);
             shaderVisitor.setForcePerPixelLighting(mForcePerPixelLighting);
+            shaderVisitor.setAutoUseNormalMaps(mAutoUseNormalMaps);
+            shaderVisitor.setNormalMapPattern(mNormalMapPattern);
             loaded->accept(shaderVisitor);
 
             // share state

components/resource/scenemanager.hpp

@@ -57,6 +57,12 @@ namespace Resource
         void setForcePerPixelLighting(bool force);
         bool getForcePerPixelLighting() const;
 
+        /// @see ShaderVisitor::setAutoUseNormalMaps
+        void setAutoUseNormalMaps(bool use);
+
+        /// @see ShaderVisitor::setNormalMapPattern
+        void setNormalMapPattern(const std::string& pattern);
+
         void setShaderPath(const std::string& path);
 
         /// Get a read-only copy of this scene "template"
@@ -126,6 +132,8 @@ namespace Resource
         bool mForceShaders;
         bool mClampLighting;
         bool mForcePerPixelLighting;
+        bool mAutoUseNormalMaps;
+        std::string mNormalMapPattern;
 
         osg::ref_ptr<MultiObjectCache> mInstanceCache;
 

components/shader/shadervisitor.cpp

@@ -5,10 +5,15 @@
 #include <osg/Texture>
 #include <osg/Material>
 #include <osg/Geometry>
+#include <osg/Image>
 
 #include <osgUtil/TangentSpaceGenerator>
 
 #include <boost/lexical_cast.hpp>
+#include <boost/algorithm/string.hpp>
+
+#include <components/resource/imagemanager.hpp>
+#include <components/vfs/manager.hpp>
 
 #include "shadermanager.hpp"
 
@@ -24,13 +29,20 @@ namespace Shader
     {
     }
 
-    ShaderVisitor::ShaderVisitor(ShaderManager& shaderManager, const std::string &defaultVsTemplate, const std::string &defaultFsTemplate)
+    ShaderVisitor::ShaderRequirements::~ShaderRequirements()
+    {
+
+    }
+
+    ShaderVisitor::ShaderVisitor(ShaderManager& shaderManager, Resource::ImageManager& imageManager, const std::string &defaultVsTemplate, const std::string &defaultFsTemplate)
         : osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
         , mForceShaders(false)
         , mClampLighting(false)
         , mForcePerPixelLighting(false)
         , mAllowedToModifyStateSets(true)
+        , mAutoUseNormalMaps(false)
         , mShaderManager(shaderManager)
+        , mImageManager(imageManager)
         , mDefaultVsTemplate(defaultVsTemplate)
         , mDefaultFsTemplate(defaultFsTemplate)
     {
@@ -81,6 +93,10 @@ namespace Shader
         if (mAllowedToModifyStateSets)
             writableStateSet = node.getStateSet();
         const osg::StateSet::TextureAttributeList& texAttributes = stateset->getTextureAttributeList();
+        if (texAttributes.size())
+        {
+            const osg::Texture* diffuseMap = NULL;
+            const osg::Texture* normalMap = NULL;
             for(unsigned int unit=0;unit<texAttributes.size();++unit)
             {
                 const osg::StateAttribute *attr = stateset->getTextureAttribute(unit, osg::StateAttribute::TEXTURE);
@@ -100,7 +116,10 @@ namespace Shader
                                     writableStateSet = getWritableStateSet(node);
                                 // normal maps are by default off since the FFP can't render them, now that we'll use shaders switch to On
                                 writableStateSet->setTextureMode(unit, GL_TEXTURE_2D, osg::StateAttribute::ON);
+                                normalMap = texture;
                             }
+                            if (texture->getName() == "diffuseMap")
+                                diffuseMap = texture;
                         }
                         else
                             std::cerr << "ShaderVisitor encountered unknown texture " << texture << std::endl;
@@ -115,6 +134,31 @@ namespace Shader
                 }
             }
 
+            if (mAutoUseNormalMaps && diffuseMap != NULL && normalMap == NULL)
+            {
+                std::string normalMap = diffuseMap->getImage(0)->getFileName();
+                boost::replace_last(normalMap, ".", mNormalMapPattern + ".");
+                if (mImageManager.getVFS()->exists(normalMap))
+                {
+                    osg::ref_ptr<osg::Texture2D> normalMapTex (new osg::Texture2D(mImageManager.getImage(normalMap)));
+                    normalMapTex->setWrap(osg::Texture::WRAP_S, diffuseMap->getWrap(osg::Texture::WRAP_S));
+                    normalMapTex->setWrap(osg::Texture::WRAP_T, diffuseMap->getWrap(osg::Texture::WRAP_T));
+                    normalMapTex->setFilter(osg::Texture::MIN_FILTER, diffuseMap->getFilter(osg::Texture::MIN_FILTER));
+                    normalMapTex->setFilter(osg::Texture::MAG_FILTER, diffuseMap->getFilter(osg::Texture::MAG_FILTER));
+                    normalMapTex->setMaxAnisotropy(diffuseMap->getMaxAnisotropy());
+                    normalMapTex->setName("normalMap");
+
+                    int unit = texAttributes.size();
+                    if (!writableStateSet)
+                        writableStateSet = getWritableStateSet(node);
+                    writableStateSet->setTextureAttributeAndModes(unit, normalMapTex, osg::StateAttribute::ON);
+                    mRequirements.back().mTextures[unit] = "normalMap";
+                    mRequirements.back().mTexStageRequiringTangents = unit;
+                    mRequirements.back().mHasNormalMap = true;
+                }
+            }
+        }
+
         const osg::StateSet::AttributeList& attributes = stateset->getAttributeList();
         for (osg::StateSet::AttributeList::const_iterator it = attributes.begin(); it != attributes.end(); ++it)
         {
@@ -209,8 +253,12 @@ namespace Shader
         if (!mRequirements.empty())
         {
             const ShaderRequirements& reqs = mRequirements.back();
-            if (reqs.mTexStageRequiringTangents != -1)
+            if (reqs.mTexStageRequiringTangents != -1 && mAllowedToModifyStateSets)
             {
+                if (geometry.getTexCoordArray(reqs.mTexStageRequiringTangents) == NULL) // assign tex coord array for normal map if necessary
+                                                                                        // the normal-map may be assigned on-the-fly in applyStateSet() when mAutoUseNormalMaps is true
+                    geometry.setTexCoordArray(reqs.mTexStageRequiringTangents, geometry.getTexCoordArray(0));
+
                 osg::ref_ptr<osgUtil::TangentSpaceGenerator> generator (new osgUtil::TangentSpaceGenerator);
                 generator->generate(&geometry, reqs.mTexStageRequiringTangents);
 
@@ -254,4 +302,14 @@ namespace Shader
         mAllowedToModifyStateSets = allowed;
     }
 
+    void ShaderVisitor::setAutoUseNormalMaps(bool use)
+    {
+        mAutoUseNormalMaps = use;
+    }
+
+    void ShaderVisitor::setNormalMapPattern(const std::string &pattern)
+    {
+        mNormalMapPattern = pattern;
+    }
+
 }

components/shader/shadervisitor.hpp

@@ -3,6 +3,11 @@
 
 #include <osg/NodeVisitor>
 
+namespace Resource
+{
+    class ImageManager;
+}
+
 namespace Shader
 {
 
@@ -12,7 +17,7 @@ namespace Shader
     class ShaderVisitor : public osg::NodeVisitor
     {
     public:
-        ShaderVisitor(ShaderManager& shaderManager, const std::string& defaultVsTemplate, const std::string& defaultFsTemplate);
+        ShaderVisitor(ShaderManager& shaderManager, Resource::ImageManager& imageManager, const std::string& defaultVsTemplate, const std::string& defaultFsTemplate);
 
         /// By default, only bump mapped objects will have a shader added to them.
         /// Setting force = true will cause all objects to render using shaders, regardless of having a bump map.
@@ -30,6 +35,11 @@ namespace Shader
         /// @par This option is useful when the ShaderVisitor is run on a "live" subgraph that may have already been submitted for rendering.
         void setAllowedToModifyStateSets(bool allowed);
 
+        /// Automatically use normal maps if a file with suitable name exists (see normal map pattern).
+        void setAutoUseNormalMaps(bool use);
+
+        void setNormalMapPattern(const std::string& pattern);
+
         virtual void apply(osg::Node& node);
 
         virtual void apply(osg::Drawable& drawable);
@@ -46,15 +56,22 @@ namespace Shader
         bool mForcePerPixelLighting;
         bool mAllowedToModifyStateSets;
 
+        bool mAutoUseNormalMaps;
+        std::string mNormalMapPattern;
+
         ShaderManager& mShaderManager;
+        Resource::ImageManager& mImageManager;
 
         struct ShaderRequirements
         {
             ShaderRequirements();
+            ~ShaderRequirements();
 
             // <texture stage, texture name>
             std::map<int, std::string> mTextures;
 
+            osg::ref_ptr<osg::Texture> mDiffuseMap;
+
             bool mHasNormalMap;
 
             bool mColorMaterial;

files/settings-default.cfg

@@ -178,6 +178,18 @@ force per pixel lighting = false
 # Setting this option to 'false' results in more realistic lighting.
 clamp lighting = true
 
+# If this option is enabled, normal maps are automatically recognized and used if they are named appropriately
+# (see 'normal map pattern', e.g. for a base texture foo.dds, the normal map texture would have to be named foo_n.dds).
+# If this option is disabled, normal maps are only used if they are explicitely listed within the mesh file (NIF file).
+# Affects objects.
+auto use object normal maps = false
+
+# See 'auto use object normal maps'. Affects terrain.
+auto use terrain normal maps = false
+
+# The filename pattern to probe for when detecting normal maps (see 'auto use object normal maps', 'auto use terrain normal maps')
+normal map pattern = _n
+
 [Input]
 
 # Capture control of the cursor prevent movement outside the window.