add choice widget type to postprocessing uniforms

apps/openmw/mwgui/postprocessorhud.cpp

@@ -168,10 +168,11 @@ namespace MWGui
         if (static_cast<size_t>(index) != selected)
         {
             auto technique = *mActiveList->getItemDataAt<std::shared_ptr<fx::Technique>>(selected);
-            if (technique->getDynamic())
+            if (technique->getDynamic() || technique->getInternal())
                 return;
 
-            if (processor->enableTechnique(std::move(technique), index) != MWRender::PostProcessor::Status_Error)
+            if (processor->enableTechnique(std::move(technique), index - mOffset)
+                != MWRender::PostProcessor::Status_Error)
                 processor->saveChain();
         }
     }
@@ -444,10 +445,16 @@ namespace MWGui
             }
         }
 
+        mOffset = 0;
         for (auto technique : processor->getTechniques())
         {
             if (!technique->getHidden())
+            {
                 mActiveList->addItem(technique->getName(), technique);
+
+                if (technique->getInternal())
+                    mOffset++;
+            }
         }
 
         auto tryFocus = [this](ListWrapper* widget, const std::string& hint) {
@@ -484,6 +491,7 @@ namespace MWGui
         factory.registerFactory<fx::Widgets::EditNumberFloat>("Widget");
         factory.registerFactory<fx::Widgets::EditNumberInt>("Widget");
         factory.registerFactory<fx::Widgets::EditBool>("Widget");
+        factory.registerFactory<fx::Widgets::EditChoice>("Widget");
         factory.registerFactory<ListWrapper>("Widget");
     }
 }

apps/openmw/mwgui/postprocessorhud.hpp

@@ -96,6 +96,8 @@ namespace MWGui
         Gui::AutoSizedEditBox* mShaderInfo;
 
         std::string mOverrideHint;
+
+        int mOffset = 0;
     };
 }
 

apps/openmw/mwrender/pingpongcanvas.cpp

@@ -1,5 +1,7 @@
 #include "pingpongcanvas.hpp"
 
+#include <cassert>
+
 #include <components/shader/shadermanager.hpp>
 #include <components/stereo/multiview.hpp>
 #include <components/stereo/stereomanager.hpp>

components/fx/technique.cpp

@@ -498,6 +498,37 @@ namespace fx
         mDefinedUniforms.emplace_back(std::move(uniform));
     }
 
+    template <class SrcT, class T>
+    SrcT Technique::getUniformValue()
+    {
+        constexpr bool isVec
+            = std::is_same_v<osg::Vec2f, SrcT> || std::is_same_v<osg::Vec3f, SrcT> || std::is_same_v<osg::Vec4f, SrcT>;
+        constexpr bool isFloat = std::is_same_v<float, SrcT>;
+        constexpr bool isInt = std::is_same_v<int, SrcT>;
+        constexpr bool isBool = std::is_same_v<bool, SrcT>;
+
+        static_assert(isVec || isFloat || isInt || isBool, "Unsupported type");
+
+        if constexpr (isVec)
+        {
+            return parseVec<SrcT, T>();
+        }
+        else if constexpr (isFloat)
+        {
+            return parseFloat();
+        }
+        else if constexpr (isInt)
+        {
+            return parseInteger();
+        }
+        else if constexpr (isBool)
+        {
+            return parseBool();
+        }
+
+        error(Misc::StringUtils::format("failed setting uniform type"));
+    }
+
     template <class SrcT, class T>
     void Technique::parseUniform()
     {
@@ -515,28 +546,13 @@ namespace fx
 
             expect<Lexer::Equal>("error parsing config for uniform block");
 
-            constexpr bool isVec = std::is_same_v<osg::Vec2f,
-                                       SrcT> || std::is_same_v<osg::Vec3f, SrcT> || std::is_same_v<osg::Vec4f, SrcT>;
-            constexpr bool isFloat = std::is_same_v<float, SrcT>;
-            constexpr bool isInt = std::is_same_v<int, SrcT>;
-            constexpr bool isBool = std::is_same_v<bool, SrcT>;
-
-            static_assert(isVec || isFloat || isInt || isBool, "Unsupported type");
-
             if (key == "default")
             {
-                if constexpr (isVec)
+                data.mDefault = getUniformValue<SrcT, T>();
-                    data.mDefault = parseVec<SrcT, T>();
-                else if constexpr (isFloat)
-                    data.mDefault = parseFloat();
-                else if constexpr (isInt)
-                    data.mDefault = parseInteger();
-                else if constexpr (isBool)
-                    data.mDefault = parseBool();
             }
             else if (key == "size")
             {
-                if constexpr (isBool)
+                if constexpr (std::is_same_v<bool, SrcT>)
                     error("bool arrays currently unsupported");
 
                 int size = parseInteger();
@@ -545,25 +561,11 @@ namespace fx
             }
             else if (key == "min")
             {
-                if constexpr (isVec)
+                data.mMin = getUniformValue<SrcT, T>();
-                    data.mMin = parseVec<SrcT, T>();
-                else if constexpr (isFloat)
-                    data.mMin = parseFloat();
-                else if constexpr (isInt)
-                    data.mMin = parseInteger();
-                else if constexpr (isBool)
-                    data.mMin = parseBool();
             }
             else if (key == "max")
             {
-                if constexpr (isVec)
+                data.mMax = getUniformValue<SrcT, T>();
-                    data.mMax = parseVec<SrcT, T>();
-                else if constexpr (isFloat)
-                    data.mMax = parseFloat();
-                else if constexpr (isInt)
-                    data.mMax = parseInteger();
-                else if constexpr (isBool)
-                    data.mMax = parseBool();
             }
             else if (key == "step")
                 uniform->mStep = parseFloat();
@@ -571,18 +573,19 @@ namespace fx
                 uniform->mStatic = parseBool();
             else if (key == "description")
             {
-                expect<Lexer::String>();
+                uniform->mDescription = parseString();
-                uniform->mDescription = std::get<Lexer::String>(mToken).value;
             }
             else if (key == "header")
             {
-                expect<Lexer::String>();
+                uniform->mHeader = parseString();
-                uniform->mHeader = std::get<Lexer::String>(mToken).value;
             }
             else if (key == "display_name")
             {
-                expect<Lexer::String>();
+                uniform->mDisplayName = parseString();
-                uniform->mDisplayName = std::get<Lexer::String>(mToken).value;
+            }
+            else if (key == "widget_type")
+            {
+                parseWidgetType<SrcT, T>(data);
             }
             else
                 error(Misc::StringUtils::format("unexpected key '%s'", std::string{ key }));
@@ -1001,6 +1004,60 @@ namespace fx
         error(Misc::StringUtils::format("unrecognized blend function '%s'", std::string{ asLiteral() }));
     }
 
+    template <class SrcT, class T>
+    void Technique::parseWidgetType(Types::Uniform<SrcT>& uniform)
+    {
+        expect<Lexer::Literal>();
+
+        if (asLiteral() == "choice")
+        {
+            /* Example usage
+
+               widget_type = choice(
+                "Option A": <T>,
+                "Option B": <T>,
+                "Option C": <T>
+               );
+
+            */
+            expect<Lexer::Open_Parenthesis>();
+
+            std::vector<fx::Types::Choice<SrcT>> choices;
+
+            while (!isNext<Lexer::Eof>())
+            {
+                fx::Types::Choice<SrcT> choice;
+                choice.mLabel = parseString();
+                expect<Lexer::Equal>();
+                choice.mValue = getUniformValue<SrcT, T>();
+                choices.push_back(choice);
+
+                if (isNext<Lexer::Comma>())
+                {
+                    mToken = mLexer->next();
+
+                    // Handle leading comma
+                    if (isNext<Lexer::Close_Parenthesis>())
+                    {
+                        break;
+                    }
+
+                    continue;
+                }
+
+                break;
+            }
+
+            uniform.mChoices = std::move(choices);
+
+            expect<Lexer::Close_Parenthesis>();
+        }
+        else
+        {
+            error(Misc::StringUtils::format("unrecognized widget type '%s'", std::string{ asLiteral() }));
+        }
+    }
+
     bool Technique::parseBool()
     {
         mToken = mLexer->next();

components/fx/technique.hpp

@@ -228,6 +228,12 @@ namespace fx
 
         int parseSourceFormat();
 
+        template <class SrcT, class T>
+        void parseWidgetType(Types::Uniform<SrcT>& uniform);
+
+        template <class SrcT, class T>
+        SrcT getUniformValue();
+
         osg::BlendEquation::Equation parseBlendEquation();
 
         osg::BlendFunc::BlendFuncMode parseBlendFuncMode();

components/fx/types.hpp

@@ -4,15 +4,9 @@
 #include <optional>
 #include <variant>
 
-#include <osg/BlendEquation>
-#include <osg/BlendFunc>
-#include <osg/Camera>
-#include <osg/FrameBufferObject>
 #include <osg/Texture2D>
 #include <osg/Uniform>
 
-#include <MyGUI_Widget.h>
-
 #include <components/debug/debuglog.hpp>
 #include <components/misc/strings/format.hpp>
 #include <components/sceneutil/depth.hpp>
@@ -56,6 +50,13 @@ namespace fx
             osg::Vec4f mClearColor = osg::Vec4f(0.0, 0.0, 0.0, 1.0);
         };
 
+        template <class T>
+        struct Choice
+        {
+            std::string mLabel;
+            T mValue;
+        };
+
         template <class T>
         struct Uniform
         {
@@ -66,6 +67,8 @@ namespace fx
             T mMin = std::numeric_limits<T>::lowest();
             T mMax = std::numeric_limits<T>::max();
 
+            std::vector<Choice<T>> mChoices;
+
             using value_type = T;
 
             bool isArray() const { return mArray.has_value(); }

components/fx/widgets.cpp

@@ -28,35 +28,20 @@ namespace fx
     {
         void EditBool::setValue(bool value)
         {
-            auto uniform = mUniform.lock();
-
-            if (!uniform)
-                return;
-
             mCheckbutton->setCaptionWithReplacing(value ? "#{Interface:On}" : "#{Interface:Off}");
             mFill->setVisible(value);
 
-            uniform->setValue<bool>(value);
+            mUniform->setValue<bool>(value);
         }
 
         void EditBool::setValueFromUniform()
         {
-            auto uniform = mUniform.lock();
+            setValue(mUniform->template getValue<bool>());
-
-            if (!uniform)
-                return;
-
-            setValue(uniform->template getValue<bool>());
         }
 
         void EditBool::toDefault()
         {
-            auto uniform = mUniform.lock();
+            setValue(mUniform->getDefault<bool>());
-
-            if (!uniform)
-                return;
-
-            setValue(uniform->getDefault<bool>());
         }
 
         void EditBool::initialiseOverride()
@@ -71,12 +56,75 @@ namespace fx
 
         void EditBool::notifyMouseButtonClick(MyGUI::Widget* sender)
         {
-            auto uniform = mUniform.lock();
+            setValue(!mUniform->getValue<bool>());
+        }
+
+        template <class T>
+        void EditChoice::setValue(const T& value)
+        {
+            // Update the combo view
+            for (size_t i = 0; i < this->mChoices->getItemCount(); i++)
+            {
+                if (*this->mChoices->getItemDataAt<T>(i) == value)
+                {
+                    this->mChoices->setIndexSelected(i);
+                    break;
+                }
+            }
+
+            mUniform->template setValue<T>(value);
+        }
+
+        void EditChoice::notifyComboBoxChanged(MyGUI::ComboBox* sender, size_t pos)
+        {
+            std::visit(
+                [this, sender, pos](auto&& data) {
+                    using T = typename std::decay_t<decltype(data)>::value_type;
+                    setValue<T>(*sender->getItemDataAt<T>(pos));
+                },
+                mUniform->mData);
+        }
+
+        void EditChoice::setValueFromUniform()
+        {
+            std::visit(
+                [this](auto&& data) {
+                    using T = typename std::decay_t<decltype(data)>::value_type;
+                    size_t index = 0;
+                    for (const auto& choice : data.mChoices)
+                    {
+                        this->mChoices->addItem(choice.mLabel, choice.mValue);
+
+                        if (choice.mValue == mUniform->template getValue<T>())
+                        {
+                            this->mChoices->setIndexSelected(index);
+                        }
+
+                        index++;
+                    }
+
+                    setValue(mUniform->template getValue<T>());
+                },
+                mUniform->mData);
+        }
+
+        void EditChoice::toDefault()
+        {
+            std::visit(
+                [this](auto&& data) {
+                    using T = typename std::decay_t<decltype(data)>::value_type;
+                    setValue(mUniform->template getDefault<T>());
+                },
+                mUniform->mData);
+        }
+
+        void EditChoice::initialiseOverride()
+        {
+            Base::initialiseOverride();
 
-            if (!uniform)
+            assignWidget(mChoices, "Choices");
-                return;
 
-            setValue(!uniform->getValue<bool>());
+            mChoices->eventComboChangePosition += MyGUI::newDelegate(this, &EditChoice::notifyComboBoxChanged);
         }
 
         void UniformBase::init(const std::shared_ptr<fx::Types::UniformBase>& uniform)
@@ -101,38 +149,48 @@ namespace fx
                 [this, &uniform](auto&& arg) {
                     using T = typename std::decay_t<decltype(arg)>::value_type;
 
-                    if constexpr (std::is_same_v<osg::Vec4f, T>)
+                    if (arg.mChoices.size() > 0)
-                    {
-                        createVectorWidget<T, EditNumberFloat4>(uniform, mClient, this);
-                    }
-                    else if constexpr (std::is_same_v<osg::Vec3f, T>)
                     {
-                        createVectorWidget<T, EditNumberFloat3>(uniform, mClient, this);
+                        auto* widget = mClient->createWidget<EditChoice>("MW_ValueEditChoice",
-                    }
-                    else if constexpr (std::is_same_v<osg::Vec2f, T>)
-                    {
-                        createVectorWidget<T, EditNumberFloat2>(uniform, mClient, this);
-                    }
-                    else if constexpr (std::is_same_v<T, float>)
-                    {
-                        auto* widget = mClient->createWidget<EditNumberFloat>("MW_ValueEditNumber",
-                            { 0, 0, mClient->getWidth(), mClient->getHeight() }, MyGUI::Align::Stretch);
-                        widget->setData(uniform);
-                        mBases.emplace_back(widget);
-                    }
-                    else if constexpr (std::is_same_v<T, int>)
-                    {
-                        auto* widget = mClient->createWidget<EditNumberInt>("MW_ValueEditNumber",
                             { 0, 0, mClient->getWidth(), mClient->getHeight() }, MyGUI::Align::Stretch);
                         widget->setData(uniform);
                         mBases.emplace_back(widget);
                     }
-                    else if constexpr (std::is_same_v<T, bool>)
+                    else
                     {
-                        auto* widget = mClient->createWidget<EditBool>("MW_ValueEditBool",
+                        if constexpr (std::is_same_v<osg::Vec4f, T>)
-                            { 0, 0, mClient->getWidth(), mClient->getHeight() }, MyGUI::Align::Stretch);
+                        {
-                        widget->setData(uniform);
+                            createVectorWidget<T, EditNumberFloat4>(uniform, mClient, this);
-                        mBases.emplace_back(widget);
+                        }
+                        else if constexpr (std::is_same_v<osg::Vec3f, T>)
+                        {
+                            createVectorWidget<T, EditNumberFloat3>(uniform, mClient, this);
+                        }
+                        else if constexpr (std::is_same_v<osg::Vec2f, T>)
+                        {
+                            createVectorWidget<T, EditNumberFloat2>(uniform, mClient, this);
+                        }
+                        else if constexpr (std::is_same_v<T, float>)
+                        {
+                            auto* widget = mClient->createWidget<EditNumberFloat>("MW_ValueEditNumber",
+                                { 0, 0, mClient->getWidth(), mClient->getHeight() }, MyGUI::Align::Stretch);
+                            widget->setData(uniform);
+                            mBases.emplace_back(widget);
+                        }
+                        else if constexpr (std::is_same_v<T, int>)
+                        {
+                            auto* widget = mClient->createWidget<EditNumberInt>("MW_ValueEditNumber",
+                                { 0, 0, mClient->getWidth(), mClient->getHeight() }, MyGUI::Align::Stretch);
+                            widget->setData(uniform);
+                            mBases.emplace_back(widget);
+                        }
+                        else if constexpr (std::is_same_v<T, bool>)
+                        {
+                            auto* widget = mClient->createWidget<EditBool>("MW_ValueEditBool",
+                                { 0, 0, mClient->getWidth(), mClient->getHeight() }, MyGUI::Align::Stretch);
+                            widget->setData(uniform);
+                            mBases.emplace_back(widget);
+                        }
                     }
 
                     mReset->eventMouseButtonClick += MyGUI::newDelegate(this, &UniformBase::notifyResetClicked);

components/fx/widgets.hpp

@@ -57,7 +57,7 @@ namespace fx
             virtual void toDefault() = 0;
 
         protected:
-            std::weak_ptr<fx::Types::UniformBase> mUniform;
+            std::shared_ptr<fx::Types::UniformBase> mUniform;
             Index mIndex;
         };
 
@@ -95,22 +95,19 @@ namespace fx
                 float range = 0.f;
                 float min = 0.f;
 
-                if (auto uniform = mUniform.lock())
+                if constexpr (std::is_fundamental_v<UType>)
                 {
-                    if constexpr (std::is_fundamental_v<UType>)
+                    mUniform->template setValue<UType>(mValue);
-                    {
+                    range = mUniform->template getMax<UType>() - mUniform->template getMin<UType>();
-                        uniform->template setValue<UType>(mValue);
+                    min = mUniform->template getMin<UType>();
-                        range = uniform->template getMax<UType>() - uniform->template getMin<UType>();
+                }
-                        min = uniform->template getMin<UType>();
+                else
-                    }
+                {
-                    else
+                    UType uvalue = mUniform->template getValue<UType>();
-                    {
+                    uvalue[mIndex] = mValue;
-                        UType uvalue = uniform->template getValue<UType>();
+                    mUniform->template setValue<UType>(uvalue);
-                        uvalue[mIndex] = mValue;
+                    range = mUniform->template getMax<UType>()[mIndex] - mUniform->template getMin<UType>()[mIndex];
-                        uniform->template setValue<UType>(uvalue);
+                    min = mUniform->template getMin<UType>()[mIndex];
-                        range = uniform->template getMax<UType>()[mIndex] - uniform->template getMin<UType>()[mIndex];
-                        min = uniform->template getMin<UType>()[mIndex];
-                    }
                 }
 
                 float fill = (range == 0.f) ? 1.f : (mValue - min) / range;
@@ -119,28 +116,22 @@ namespace fx
 
             void setValueFromUniform() override
             {
-                if (auto uniform = mUniform.lock())
+                T value;
-                {
-                    T value;
 
-                    if constexpr (std::is_fundamental_v<UType>)
+                if constexpr (std::is_fundamental_v<UType>)
-                        value = uniform->template getValue<UType>();
+                    value = mUniform->template getValue<UType>();
-                    else
+                else
-                        value = uniform->template getValue<UType>()[mIndex];
+                    value = mUniform->template getValue<UType>()[mIndex];
 
-                    setValue(value);
+                setValue(value);
-                }
             }
 
             void toDefault() override
             {
-                if (auto uniform = mUniform.lock())
+                if constexpr (std::is_fundamental_v<UType>)
-                {
+                    setValue(mUniform->template getDefault<UType>());
-                    if constexpr (std::is_fundamental_v<UType>)
+                else
-                        setValue(uniform->template getDefault<UType>());
+                    setValue(mUniform->template getDefault<UType>()[mIndex]);
-                    else
-                        setValue(uniform->template getDefault<UType>()[mIndex]);
-                }
             }
 
         private:
@@ -164,15 +155,10 @@ namespace fx
 
             void notifyMouseWheel(MyGUI::Widget* sender, int rel)
             {
-                auto uniform = mUniform.lock();
-
-                if (!uniform)
-                    return;
-
                 if (rel > 0)
-                    increment(uniform->mStep);
+                    increment(mUniform->mStep);
                 else
-                    increment(-uniform->mStep);
+                    increment(-mUniform->mStep);
             }
 
             void notifyMouseButtonDragged(MyGUI::Widget* sender, int left, int top, MyGUI::MouseButton id)
@@ -180,24 +166,19 @@ namespace fx
                 if (id != MyGUI::MouseButton::Left)
                     return;
 
-                auto uniform = mUniform.lock();
-
-                if (!uniform)
-                    return;
-
                 int delta = left - mLastPointerX;
 
                 // allow finer tuning when shift is pressed
                 constexpr double scaling = 20.0;
                 T step
-                    = MyGUI::InputManager::getInstance().isShiftPressed() ? uniform->mStep / scaling : uniform->mStep;
+                    = MyGUI::InputManager::getInstance().isShiftPressed() ? mUniform->mStep / scaling : mUniform->mStep;
 
                 if (step == 0)
                 {
                     if constexpr (std::is_integral_v<T>)
                         step = 1;
                     else
-                        step = uniform->mStep;
+                        step = mUniform->mStep;
                 }
 
                 if (delta > 0)
@@ -218,30 +199,20 @@ namespace fx
 
             void increment(T step)
             {
-                auto uniform = mUniform.lock();
-
-                if (!uniform)
-                    return;
-
                 if constexpr (std::is_fundamental_v<UType>)
-                    setValue(std::clamp<T>(uniform->template getValue<UType>() + step,
+                    setValue(std::clamp<T>(mUniform->template getValue<UType>() + step,
-                        uniform->template getMin<UType>(), uniform->template getMax<T>()));
+                        mUniform->template getMin<UType>(), mUniform->template getMax<T>()));
                 else
-                    setValue(std::clamp<T>(uniform->template getValue<UType>()[mIndex] + step,
+                    setValue(std::clamp<T>(mUniform->template getValue<UType>()[mIndex] + step,
-                        uniform->template getMin<UType>()[mIndex], uniform->template getMax<UType>()[mIndex]));
+                        mUniform->template getMin<UType>()[mIndex], mUniform->template getMax<UType>()[mIndex]));
             }
 
             void notifyButtonClicked(MyGUI::Widget* sender)
             {
-                auto uniform = mUniform.lock();
-
-                if (!uniform)
-                    return;
-
                 if (sender == mButtonDecrease)
-                    increment(-uniform->mStep);
+                    increment(-mUniform->mStep);
                 else if (sender == mButtonIncrease)
-                    increment(uniform->mStep);
+                    increment(mUniform->mStep);
             }
 
             MyGUI::Button* mButtonDecrease{ nullptr };
@@ -275,6 +246,23 @@ namespace fx
             MYGUI_RTTI_DERIVED(EditNumberInt)
         };
 
+        class EditChoice : public EditBase, public MyGUI::Widget
+        {
+            MYGUI_RTTI_DERIVED(EditChoice)
+
+        public:
+            template <class T>
+            void setValue(const T& value);
+            void setValueFromUniform() override;
+            void toDefault() override;
+
+        private:
+            void initialiseOverride() override;
+            void notifyComboBoxChanged(MyGUI::ComboBox* sender, size_t pos);
+
+            MyGUI::ComboBox* mChoices{ nullptr };
+        };
+
         class UniformBase final : public MyGUI::Widget
         {
             MYGUI_RTTI_DERIVED(UniformBase)

docs/source/reference/postprocessing/omwfx.rst

@@ -451,21 +451,21 @@ To use the sampler, define the appropriately named `sampler2D` in any of your pa
 It is possible to define settings for your shaders that can be adjusted by either users or a Lua script.
 
 
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
-| Block           | default  | min      | max      | static  | step     | description  |  display_name     | header  |
+| Block           | default  | min      | max      | static  | step     | description  |  display_name     | header  |  widget_type |
-+=================+==========+==========+==========+=========+==========+==============+===================+=========+
++=================+==========+==========+==========+=========+==========+==============+===================+=========+==============+
-|``uniform_bool`` | boolean  | x        | x        | boolean | x        | string       |  string           | string  |
+|``uniform_bool`` | boolean  | x        | x        | boolean | x        | string       |  string           | string  |  choice(...) |
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
-|``uniform_float``| float    | float    | float    | boolean | float    | string       |  string           | string  |
+|``uniform_float``| float    | float    | float    | boolean | float    | string       |  string           | string  |  choice(...) |
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
-|``uniform_int``  | integer  | integer  | integer  | boolean | integer  | string       |  string           | string  |
+|``uniform_int``  | integer  | integer  | integer  | boolean | integer  | string       |  string           | string  |  choice(...) |
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
-|``uniform_vec2`` | vec2     | vec2     | vec2     | boolean | vec2     | string       |  string           | string  |
+|``uniform_vec2`` | vec2     | vec2     | vec2     | boolean | vec2     | string       |  string           | string  |  choice(...) |
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
-|``uniform_vec3`` | vec3     | vec3     | vec3     | boolean | vec3     | string       |  string           | string  |
+|``uniform_vec3`` | vec3     | vec3     | vec3     | boolean | vec3     | string       |  string           | string  |  choice(...) |
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
-|``uniform_vec4`` | vec4     | vec4     | vec4     | boolean | vec4     | string       |  string           | string  |
+|``uniform_vec4`` | vec4     | vec4     | vec4     | boolean | vec4     | string       |  string           | string  |  choice(...) |
-+-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+
++-----------------+----------+----------+----------+---------+----------+--------------+-------------------+---------+--------------+
 
 The ``description`` field is used to display a toolip when viewed in the in-game HUD. The ``header`` field
 field can be used to organize uniforms into groups in the HUD. The ``display_name`` field can be used to create a
@@ -509,6 +509,21 @@ These uniform blocks must be defined with the new ``size`` parameter.
         size = 10;
     }
 
+You may also define a dropdown list for users to select specific values from instead of the default sliders using the ``widget_type`` field.
+Each item in the dropdown has an associated display name, which can be a localized string.
+
+.. code-block:: none
+
+    uniform_int uStrength {
+        default = 2;
+        display_name = "Strength";
+        widget_type = choice(
+            "Low" = 1,
+            "Medium" = 2,
+            "High" = 3
+        );
+    }
+
 ``render_target``
 *****************
 

files/data/mygui/openmw_postprocessor_hud.skin.xml

@@ -1,6 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <MyGUI type="Resource" version="1.1">
 
+	<Resource type="ResourceLayout" name="MW_ValueEditChoice" version="3.2.0">
+		<Widget type="Widget" skin="" position="0 0 100 50" align="Stretch" name="Root">
+            <Widget type="ComboBox" skin="MW_ComboBox" position_real="0 0 1 1"  align="Stretch" name="Choices">
+                <Property key="Caption" value=""/>
+                <UserString key="HStretch" value="true"/>
+                <UserString key="VStretch" value="true"/>
+            </Widget>
+		</Widget>
+	</Resource>
+
 	<Resource type="ResourceLayout" name="MW_ValueEditNumber" version="3.2.0">
 		<Widget type="Widget" skin="" position="0 0 100 50" align="Stretch" name="Root">
             <Widget type="Widget" skin="BlackBG" position="0 0 100 50" name="Fill" align="Stretch">