commit 4e86a202383683aae19db8ce8ec6f3fb6206f6de
Author: Joshua Ashton <joshua@froggi.es>
Date:   Sun Jun 12 16:33:55 2022 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..67f0073
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+build
+.cache
+
diff --git a/include/Orange/Core/AlignedStorage.h b/include/Orange/Core/AlignedStorage.h
new file mode 100644
index 0000000..567afd0
--- /dev/null
+++ b/include/Orange/Core/AlignedStorage.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <Orange/Core/Types.h>
+
+namespace orange
+{
+    template <size_t Length, size_t Alignment>
+    struct AlignedStorage
+    {
+        alignas(Alignment) unsigned char data[Length];
+    };
+}
diff --git a/include/Orange/Core/FileSystem.h b/include/Orange/Core/FileSystem.h
new file mode 100644
index 0000000..e26986a
--- /dev/null
+++ b/include/Orange/Core/FileSystem.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <Orange/Core/Result.h>
+
+namespace orange::fs
+{
+    class File
+    {
+        
+    };
+    //Result<File>
+}
diff --git a/include/Orange/Core/Hash.h b/include/Orange/Core/Hash.h
new file mode 100644
index 0000000..1ff1a3d
--- /dev/null
+++ b/include/Orange/Core/Hash.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <Orange/Core/Types.h>
+
+namespace orange
+{
+    constexpr uint32_t HashString(const char* s, size_t count)
+    {
+        return ((count ? HashString(s, count - 1) : 2166136261u) ^ s[count]) * 16777619u;
+    }
+
+    constexpr uint32_t operator"" _hash(const char* s, size_t count)
+    {
+        return HashString(s, count);
+    }
+}
diff --git a/include/Orange/Core/Log.h b/include/Orange/Core/Log.h
new file mode 100644
index 0000000..0090052
--- /dev/null
+++ b/include/Orange/Core/Log.h
@@ -0,0 +1,6 @@
+#pragma once
+
+namespace orange
+{
+    #define Assert(...)
+}
\ No newline at end of file
diff --git a/include/Orange/Core/Result.h b/include/Orange/Core/Result.h
new file mode 100644
index 0000000..399db29
--- /dev/null
+++ b/include/Orange/Core/Result.h
@@ -0,0 +1,82 @@
+#pragma once
+
+#include <Orange/Core/Log.h>
+#include <Orange/Core/AlignedStorage.h>
+#include <Orange/Core/Traits.h>
+
+namespace orange
+{
+    enum class BasicErrorCode : int32_t
+    {
+        Invalid  = -1,
+        Failed   = -2,
+
+        Success =  0,
+    };
+
+    template <typename T, typename ErrorCode = BasicErrorCode>
+    class Result
+    {
+    public:
+        ~Result() { Destroy(); }
+
+        T* Get()
+        {
+            Assert(IsSuccess());
+            if (!IsSuccess())
+                return nullptr;
+
+            return &RefUnsafe();
+        }
+
+        const T* Get() const
+        {
+            Assert(IsSuccess());
+            if (!IsSuccess())
+                return nullptr;
+
+            return &RefUnsafe();
+        }
+
+        bool IsSuccess() const { return static_cast<int32_t>(m_error) >= 0; }
+
+        operator bool() const { return IsSuccess(); }
+
+              T* operator ->()       { return Get(); }
+        const T* operator ->() const { return Get(); }
+
+              T& operator *()        { return *Get(); }
+        const T& operator *()  const { return *Get(); }
+    protected:
+        Result() = default;
+
+        template <typename... Args>
+        T& Create(Args&&... args)
+        {
+            Assert(!m_created);
+            m_created = true;
+            new(&m_data) T(Forward<Args>(args)...);
+            return RefUnsafe();
+        }
+
+        void Destroy()
+        {
+            if (m_created)
+            {
+                RefUnsafe().~T();
+                m_created = false;
+            }
+        }
+
+        Result& Error(ErrorCode code) { m_error = code;               return *this; }
+        Result& Success()             { m_error = ErrorCode::Success; return *this; }
+
+              T& RefUnsafe()       { return *reinterpret_cast<      T*>(&m_data); }
+        const T& RefUnsafe() const { return *reinterpret_cast<const T*>(&m_data); }
+
+        friend T;
+        AlignedStorage<sizeof(T), alignof(T)> m_data;
+        ErrorCode                             m_error = ErrorCode::Invalid;
+        bool                                  m_created = false;
+    };
+}
\ No newline at end of file
diff --git a/include/Orange/Core/SmallVector.h b/include/Orange/Core/SmallVector.h
new file mode 100644
index 0000000..ad511e3
--- /dev/null
+++ b/include/Orange/Core/SmallVector.h
@@ -0,0 +1,148 @@
+#pragma once
+
+#include <Orange/Core/AlignedStorage.h>
+
+namespace orange
+{
+    template <typename T, size_t N>
+    class SmallVector
+    {
+    public:
+
+        SmallVector() {}
+        SmallVector(size_t size) { Resize(size); }
+
+        SmallVector             (const SmallVector&) = delete;
+        SmallVector& operator = (const SmallVector&) = delete;
+
+        ~SmallVector()
+        {
+            for (size_t i = 0; i < m_size; i++)
+                Ptr(i)->~T();
+
+            if (m_capacity > N)
+                delete[] u.m_ptr;
+        }
+
+        size_t Size() const
+        {
+            return m_size;
+        }
+
+        void Reserve(size_t n)
+        {
+            n = PickCapacity(n);
+
+            if (n <= m_capacity)
+                return;
+
+            Storage* data = new Storage[n];
+
+            for (size_t i = 0; i < m_size; i++)
+            {
+                new (&data[i]) T(Move(*Ptr(i)));
+                Ptr(i)->~T();
+            }
+
+            if (m_capacity > N)
+                delete[] u.m_ptr;
+
+            m_capacity = n;
+            u.m_ptr = data;
+        }
+
+        const T* Data() const { return Ptr(0); }
+              T* Data()       { return Ptr(0); }
+
+        void Resize(size_t n)
+        {
+            Reserve(n);
+
+            for (size_t i = n; i < m_size; i++)
+                Ptr(i)->~T();
+
+            for (size_t i = m_size; i < n; i++)
+                new (Ptr(i)) T();
+        }
+
+        void PushBack(const T& object)
+        {
+            Reserve(m_size + 1);
+            new (Ptr(m_size++)) T(object);
+        }
+
+        void PushBack(T&& object)
+        {
+            Reserve(m_size + 1);
+            new (Ptr(m_size++)) T(Move(object));
+        }
+
+        template<typename... Args>
+        void EmplaceBack(Args... args)
+        {
+            Reserve(m_size + 1);
+            new (Ptr(m_size++)) T(Forward<Args>(args)...);
+        }
+
+        void Erase(size_t idx)
+        {
+            Ptr(idx)->~T();
+
+            for (size_t i = idx; i < m_size - 1; i++)
+            {
+                new (Ptr(i)) T(Move(*Ptr(i + 1)));
+                Ptr(i + 1)->~T();
+            }
+        }
+
+        void PopBack()
+        {
+            Ptr(--m_size)->~T();
+        }
+
+              T& operator [] (size_t idx)       { return *Ptr(idx); }
+        const T& operator [] (size_t idx) const { return *Ptr(idx); }
+
+              T& front()       { return *Ptr(0); }
+        const T& front() const { return *Ptr(0); }
+
+              T& back()       { return *Ptr(m_size - 1); }
+        const T& back() const { return *Ptr(m_size - 1); }
+
+    private:
+        using Storage = AlignedStorage<sizeof(T), alignof(T)>;
+
+        size_t m_capacity = N;
+        size_t m_size     = 0;
+
+        union
+        {
+            Storage* m_ptr;
+            Storage  m_data[sizeof(T) * N];
+        } u;
+
+        size_t PickCapacity(size_t n) {
+            size_t capacity = m_capacity;
+
+            while (capacity < n)
+                capacity *= 2;
+
+            return capacity;
+        }
+
+        T* Ptr(size_t idx) {
+            return m_capacity == N
+            ? reinterpret_cast<T*>(&u.m_data[idx])
+            : reinterpret_cast<T*>(&u.m_ptr[idx]);
+        }
+
+        const T* Ptr(size_t idx) const
+        {
+            return m_capacity == N
+            ? reinterpret_cast<const T*>(&u.m_data[idx])
+            : reinterpret_cast<const T*>(&u.m_ptr[idx]);
+        }
+
+    };
+
+}
diff --git a/include/Orange/Core/Span.h b/include/Orange/Core/Span.h
new file mode 100644
index 0000000..a8334bf
--- /dev/null
+++ b/include/Orange/Core/Span.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <Orange/Core/Types.h>
+
+namespace orange
+{
+    template <typename T>
+    struct Span
+    {
+        Span(T* data, size_t size) : data(data), size(size) {}
+
+        template <size_t Count>
+        Span(T (&array)[Count]) : data(array), size(Count) {}
+
+        explicit Span(T* data) : data(data), size(1) {}
+        explicit Span(T& data) : data(&data), size(1) {}
+        
+              T& operator [] (size_t idx)       { return data[idx]; }
+        const T& operator [] (size_t idx) const { return data[idx]; }
+
+        bool IsEmpty() const { return size == 0; }
+
+              T& front()       { return *data[idx]; }
+        const T& front() const { return *data[idx]; }
+
+              T& back()       { return *data[size - 1]; }
+        const T& back() const { return *data[size - 1]; }
+
+        T* data;
+        size_t size;
+    };
+}
diff --git a/include/Orange/Core/Traits.h b/include/Orange/Core/Traits.h
new file mode 100644
index 0000000..473cfb5
--- /dev/null
+++ b/include/Orange/Core/Traits.h
@@ -0,0 +1,33 @@
+#pragma once
+
+namespace orange
+{
+    struct FalseType { static constexpr bool Value = false; };
+    struct TrueType  { static constexpr bool Value = true;  };
+
+    template <typename T> struct IsLValueReference     : FalseType {};
+    template <typename T> struct IsLValueReference<T&> : TrueType {};
+
+    template <typename T> struct RemoveReference_      { using Type = T; };
+    template <typename T> struct RemoveReference_<T&>  { using Type = T; };
+    template <typename T> struct RemoveReference_<T&&> { using Type = T; };
+
+    template <typename T>
+    using RemoveReference = typename RemoveReference_<T>::Type;
+
+    template <typename T>
+    constexpr T&& Forward(RemoveReference<T>& t) { return static_cast<T&&>(t); }
+
+    template <typename T>
+    constexpr T&& Forward(RemoveReference<T>&& t)
+    {
+        static_assert(!IsLValueReference<T>::Value, "Can not forward an rvalue as an lvalue.");
+        return static_cast<T&&>(t);
+    }
+
+    template <typename T>
+    constexpr RemoveReference<T>&& Move(T&& arg)
+    {
+        return static_cast<RemoveReference<T>&&>(arg);
+    }
+}
\ No newline at end of file
diff --git a/include/Orange/Core/Types.h b/include/Orange/Core/Types.h
new file mode 100644
index 0000000..e0c95a5
--- /dev/null
+++ b/include/Orange/Core/Types.h
@@ -0,0 +1,4 @@
+#pragma once
+
+#include <cstdint>
+#include <cstddef>
diff --git a/include/Orange/Formats/BSP/Quake2.h b/include/Orange/Formats/BSP/Quake2.h
new file mode 100644
index 0000000..0456088
--- /dev/null
+++ b/include/Orange/Formats/BSP/Quake2.h
@@ -0,0 +1,109 @@
+#pragma once
+
+#include <Orange/Core/Types.h>
+
+namespace orange
+{
+    class Quake2BSP
+    {
+    public:
+        Quake2BSP(const void* data, size_t size);
+    private:
+        static constexpr uint32_t LumpCount = 19;
+        static constexpr uint32_t MaxLightmapStyles = 4;
+
+        struct LumpType
+        {
+            enum
+            {
+                Entities,
+                Planes,
+                Vertices,
+                Visibility,
+                Nodes,
+                TextureInfo,
+                Faces,
+                Lightmaps,
+                Leaves,
+                LeafFaceTable,
+                LeafBrushTable,
+                Edges,
+                FaceEdgeTable,
+                Models,
+                Brushes,
+                BrushSides,
+                Pop,
+                Areas,
+                AreaPortals,
+            };
+        };
+
+        struct LumpPointer
+        {
+            uint32_t offset;
+            uint32_t length;
+        };
+
+        struct BSPHeader
+        {
+            uint32_t magic;
+            uint32_t version;
+
+            LumpPointer lumps[LumpCount];
+        };
+
+        struct BSPFace
+        {
+            uint16_t plane;
+            uint16_t planeSide;
+
+            uint32_t firstEdge;
+            uint16_t numEdges;
+
+            uint16_t textureInfoIdx;
+
+            uint8_t  lightmapStyles[MaxLightmapStyles];
+            uint32_t lightmapOffset;
+        };
+
+        struct BSPPlane
+        {
+            float    normal[3];
+            float    distance;
+            uint32_t type;
+        };
+
+        struct BSPNode
+        {
+            uint32_t plane;
+
+            int32_t frontChild;
+            int32_t backChild;
+
+            int16_t bboxMins[3];
+            int16_t bboxMaxs[3];
+
+            uint16_t firstLeafFace;
+            uint16_t numLeafFaces;
+
+            uint16_t firstLeafBrush;
+            uint16_t numLeafBrushes;
+        };
+
+        struct BSPTexInfo
+        {
+            float uAxis[3];
+            float uOffset;
+
+            float vAxis[3];
+            float vOffset;
+
+            uint32_t flags;
+            uint32_t value;
+
+            char textureName[32];
+
+            uint32_t nextTexInfo;
+        };
+    };
+}
diff --git a/include/Orange/Render/ForwardRenderer.h b/include/Orange/Render/ForwardRenderer.h
new file mode 100644
index 0000000..2627af6
--- /dev/null
+++ b/include/Orange/Render/ForwardRenderer.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include <Orange/Core/Result.h>
+#include <Orange/Render/Renderer.h>
+
+namespace orange
+{
+    class ForwardRenderer : public Renderer
+    {
+    public:
+        ~ForwardRenderer() = default;
+
+        static Result<ForwardRenderer> create(SDL_Window* window, const char* name)
+        {
+            Result<ForwardRenderer> result;
+
+            ForwardRenderer& renderer = result.Create();
+
+            if ((renderer.m_instance = createInstance(window, name)) == VK_NULL_HANDLE)
+                return result.Error(BasicErrorCode::Failed);
+
+            return result.Success();
+        }
+    protected:
+        friend Result<ForwardRenderer>;
+        ForwardRenderer() = default;
+    };
+}
\ No newline at end of file
diff --git a/include/Orange/Render/Renderer.h b/include/Orange/Render/Renderer.h
new file mode 100644
index 0000000..8ab9166
--- /dev/null
+++ b/include/Orange/Render/Renderer.h
@@ -0,0 +1,71 @@
+#pragma once
+
+#include <Orange/Core/Types.h>
+#include <Orange/Core/SmallVector.h>
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_vulkan.h>
+#include <vulkan/vulkan_core.h>
+
+namespace orange
+{
+
+    class Renderer
+    {
+    public:
+        ~Renderer() = default;
+
+    protected:
+        Renderer() = default;
+
+        static VkInstance createInstance(SDL_Window* window, const char* name)
+        {
+            uint32_t instanceExtensionCount = {};
+            if (SDL_Vulkan_GetInstanceExtensions(window, &instanceExtensionCount, nullptr) != SDL_TRUE)
+            {
+                //std::cerr << "Failed to get SDL instance extension count.\n";
+                return VK_NULL_HANDLE;
+            }
+
+            SmallVector<const char *, 8> instanceExtensions{ instanceExtensionCount };
+            if (SDL_Vulkan_GetInstanceExtensions(window, &instanceExtensionCount, instanceExtensions.Data()) != SDL_TRUE)
+            {
+                //std::cerr << "Failed to get SDL instance extensions.\n";
+                return VK_NULL_HANDLE;
+            }
+
+            VkApplicationInfo appInfo =
+            {
+                .sType              = VK_STRUCTURE_TYPE_APPLICATION_INFO,
+                .pApplicationName   = name,
+                .applicationVersion = VK_MAKE_VERSION(1, 0, 0),
+                .pEngineName        = "Orange",
+                .engineVersion      = VK_MAKE_VERSION(1, 0, 0),
+                .apiVersion         = VK_API_VERSION_1_3,
+            };
+
+            VkInstanceCreateInfo instanceInfo =
+            {
+                .sType                   = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
+                .pApplicationInfo        = &appInfo,
+                .enabledExtensionCount   = instanceExtensionCount,
+                .ppEnabledExtensionNames = instanceExtensions.Data(),
+            };
+
+            VkResult result = VK_SUCCESS;
+            VkInstance instance;
+            if ((result = vkCreateInstance(&instanceInfo, nullptr, &instance)) != VK_SUCCESS)
+            {
+                //std::cerr << "Failed to create Vulkan instance.\n";
+                return VK_NULL_HANDLE;
+            }
+
+            return instance;  
+        }
+
+        VkInstance       m_instance       = VK_NULL_HANDLE;
+        VkPhysicalDevice m_physicalDevice = VK_NULL_HANDLE;
+        VkDevice         m_device         = VK_NULL_HANDLE;
+    };
+
+}
\ No newline at end of file
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..520f4eb
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,16 @@
+project('orange', ['cpp'], version : '0.0.1', meson_version : '>= 0.49', default_options : [
+  'warning_level=2',
+  'c_std=c11',
+  'cpp_std=c++20'
+])
+
+orange_compiler = meson.get_compiler('cpp')
+add_project_arguments(orange_compiler.get_supported_arguments([
+  '-Wno-missing-field-initializers',
+]), language : 'cpp')
+
+orange_include = include_directories(['include'])
+sdl2_dep = dependency('SDL2')
+vulkan_dep = dependency('vulkan') # get rid of me!
+
+subdir('src')
diff --git a/src/Apps/Tools/BSPViewer.cpp b/src/Apps/Tools/BSPViewer.cpp
new file mode 100644
index 0000000..0b3f3fd
--- /dev/null
+++ b/src/Apps/Tools/BSPViewer.cpp
@@ -0,0 +1,7 @@
+#include <Orange/Core/Result.h>
+#include <Orange/Render/ForwardRenderer.h>
+
+int main(int argc, char** argv)
+{
+
+}
diff --git a/src/Apps/Tools/meson.build b/src/Apps/Tools/meson.build
new file mode 100644
index 0000000..662667b
--- /dev/null
+++ b/src/Apps/Tools/meson.build
@@ -0,0 +1,3 @@
+executable('BSPViewer', 'BSPViewer.cpp',
+  dependencies        : [sdl2_dep, vulkan_dep],
+  include_directories : [orange_include])
diff --git a/src/Apps/meson.build b/src/Apps/meson.build
new file mode 100644
index 0000000..6750ddd
--- /dev/null
+++ b/src/Apps/meson.build
@@ -0,0 +1 @@
+subdir('Tools')
diff --git a/src/meson.build b/src/meson.build
new file mode 100644
index 0000000..9cf7eec
--- /dev/null
+++ b/src/meson.build
@@ -0,0 +1 @@
+subdir('Apps')
\ No newline at end of file