Get VBO data back from the GPU.

Make it such that a sprites "origin" doesn't effect the position. It is only the point at which transformations are done about.

CMakeLists.txt

@@ -27,12 +27,12 @@ CPMAddPackage(
 
 CPMAddPackage(
         NAME ReWindow
-        URL https://git.redacted.cc/Redacted/ReWindow/archive/Prerelease-13.zip
+        URL https://git.redacted.cc/Redacted/ReWindow/archive/Prerelease-15.zip
 )
 
 CPMAddPackage(
         NAME GLAD
-        URL https://git.redacted.cc/Redacted/glad/archive/v2.1ext_mt.zip
+        URL https://git.redacted.cc/Redacted/glad/archive/v2.1ext_fbo.zip
 )
 
 CPMAddPackage(
@@ -80,16 +80,16 @@ endif()
 
 set_target_properties(JGL PROPERTIES LINKER_LANGUAGE CXX)
 
-#Don't expose this one because it's only to be used in the demo program.
-include_directories(${ReTexture_SOURCE_DIR}/include)
+#Don't expose these ones.
+include_directories(${ReWindow_SOURCE_DIR}/include)
 
 target_include_directories(JGL PUBLIC
         ${PROJECT_SOURCE_DIR}/include
         ${OPENGL_INCLUDE_DIRS}
+        ${ReTexture_SOURCE_DIR}/include
         ${mcolor_SOURCE_DIR}/include
         ${J3ML_SOURCE_DIR}/include
         ${Event_SOURCE_DIR}/include
-        ${ReWindow_SOURCE_DIR}/include
         ${glad_SOURCE_DIR}/include
         ${jlog_SOURCE_DIR}/include
 )
@@ -100,13 +100,13 @@ add_executable(JGL_Demo main.cpp)
 if (UNIX AND NOT APPLE)
     target_include_directories(JGL PRIVATE ${FREETYPE_INCLUDE_DIRS})
     target_link_libraries(JGL PRIVATE ${FREETYPE_LIBRARIES})
-    target_link_libraries(JGL PUBLIC ${OPENGL_LIBRARIES} mcolor J3ML ReWindowLibrary glad jlog Event ReTexture)
+    target_link_libraries(JGL PUBLIC ${OPENGL_LIBRARIES} mcolor J3ML glad jlog Event ReTexture)
 endif()
 
 if (WIN32)
     target_include_directories(JGL PRIVATE ${freetype_SOURCE_DIR}/include)
     target_link_libraries(JGL PRIVATE freetype)
-    target_link_libraries(JGL PUBLIC ${OPENGL_LIBRARIES} mcolor J3ML ReWindowLibrary glad jlog Event ReTexture)
+    target_link_libraries(JGL PUBLIC ${OPENGL_LIBRARIES} mcolor J3ML glad jlog Event ReTexture)
 endif()
 
-target_link_libraries(JGL_Demo PUBLIC JGL)
+target_link_libraries(JGL_Demo PUBLIC JGL ReWindowLibrary)

include/JGL/JGL.h

@@ -13,61 +13,36 @@
 #pragma once
 
 #include <string>
-#include <iostream>
-#include <Color3.hpp>
 #include <Color4.hpp>
-#include <Colors.hpp>
 #include <JGL/types/Texture.h>
-#include <JGL/types/enums.h>
+#include <JGL/types/Enums.h>
 #include <JGL/types/FontCache.h>
 #include <JGL/types/Font.h>
+#include <JGL/types/RenderTarget.h>
 #include <J3ML/LinearAlgebra.hpp>
 #include <J3ML/LinearAlgebra/Vector2.hpp>
 #include <J3ML/LinearAlgebra/Vector3.hpp>
 #include <J3ML/Geometry/Sphere.hpp>
 #include <J3ML/Geometry/Capsule.hpp>
-#include <J3ML/Geometry/TriangleMesh.hpp>
-#include <JGL/Logger.h>
+#include <J3ML/Geometry/Triangle2D.hpp>
 
-
-/// OpenGL Wrapper for rendering 2D graphics primitives in both a 2D and 3D context
+/// OpenGL Wrapper for rendering 2D & 3D graphics in both a 2D and 3D context.
 namespace JGL {
     using namespace J3ML::LinearAlgebra;
     using namespace J3ML::Geometry;
 
-    /// TODO: Implement HSV and other color representation conversions
-    struct HSV {
-        float hue;
-        float saturation;
-        float value;
-    };
-
-    /// TODO: Migrate to using J3ML's definition once finished (hint hint)
-    struct Triangle2D
-    {
-        Vector2 A;
-        Vector2 B;
-        Vector2 C;
-    };
-
     void Update(const Vector2& window_size);
-    void PurgeFontCache();
-
-    // TODO: Implement
-    void SetActiveFont(const Font& font);
-
-    // TODO: Overrides specifically for Color3 are not **strictly** necessary, Color3 and Color4 should implicitly convert back and forth.
-
+    inline void PurgeFontCache() { fontCache.purgeCache(); }
+    std::vector<GLfloat> OpenGLPerspectiveProjectionRH(float fovY, float aspect, float z_near, float z_far);
 
     /// Drawing functions for primitive 2D Shapes.
-    /// Each function is overloaded with Color3 and Color4 for optional transparency.
     namespace J2D {
-        /// Open a 2-D rendering context with the underlying graphics system (In this case & by default OpenGL).
+        /// Open a 2-D rendering context with the underlying graphics system (In this case&  by default OpenGL).
         /// @note This call may not strictly be necessary on some setups, but is provided to keep the API constant.
         /// It is recommended to always open a JGL 2D context to render your content, then close when completed.
         /// This keeps our code from, say, clobbering the OpenGL rendering context driving 3D content in between our calls.
-        void Begin();
-        /// Closes a 2-D rendering context with the underlying graphics system (In this case & by default OpenGL).
+        void Begin(RenderTarget* render_target = nullptr, bool clear_buffers = false);
+        /// Closes a 2-D rendering context with the underlying graphics system (In this case&  by default OpenGL).
         /// @see Begin().
         void End();
 
@@ -86,12 +61,23 @@ namespace JGL {
         void DrawLine(const Color4& color, float x1, float y1, float x2, float y2, float thickness = 1);
 
         ///Draws a line with a gradient that transitions across it.
-        void DrawGradientLine(const Color4& color1, const Color4& color2, const Vector2& A, const Vector2& B, float thickness = 1);
-        void DrawGradientLine(const Color4& color1, const Color4& color2, float x, float y, float w, float h, float thickness = 1);
+        void DrawGradientLine(const Color4& color_a, const Color4& color_b, const Vector2& A, const Vector2& B, float thickness = 1);
+        void DrawGradientLine(const Color4& color_a, const Color4& color_b, float x, float y, float w, float h, float thickness = 1);
 
         /// Draws an outline of a rectangle on the screen.
         void OutlineRect(const Color4& color, const Vector2& pos, const Vector2& size, float thickness = 1);
 
+        /// Draws a filled rectangle on the screen.
+        void FillRect(const Color4& color, const Vector2& pos, const Vector2& size);
+
+        /// Draws a filled rectangle where the color transitions across it.
+        void FillGradientRect(const Color4& color1, const Color4& color2, const Direction& gradient, const Vector2& pos, const Vector2& size);
+
+        /// Draws a filled rectangle with rounded corners on the screen.
+        void FillRoundedRect(const Color4& color, const Vector2& pos, const Vector2& size, float radius = 5, unsigned int subdivisions = 8);
+
+        void DrawRenderTargetAsSprite(const RenderTarget& render_target, const Vector2& position, float rad_rotation = 0, const Vector2& origin = Vector2(0 , 0),
+                const Vector2& scale = Vector2(1, 1), const Color4& color = Colors::White, Direction inversion = Direction::None);
         /// Draws a sprite to the screen by passing a G̶L̶u̶i̶n̶t̶ JGL Texture that represents a handle to a loaded texture.
         /// @param texture
         /// @param position
@@ -102,14 +88,14 @@ namespace JGL {
         /// @param inversion inverts the texture only.
         /// @see class Texture
         void DrawSprite(const Texture& texture, const Vector2& position, float rad_rotation = 0, const Vector2& origin = Vector2(0,0),
-                        const Vector2& scale = Vector2(1,1), const Color4& color = Colors::White, Inversion inversion = Inversion::None);
+                        const Vector2& scale = Vector2(1,1), const Color4& color = Colors::White, Direction inversion = Direction::None);
         void DrawSprite(const Texture& texture,
                         float positionX, float positionY,
                         float rad_rotation = 0,
                         float originX = 0, float originY = 0,
                         float scaleX = 1, float scaleY = 1,
                         const Color4& color = Colors::White,
-                        Inversion inversion = Inversion::None);
+                        Direction inversion = Direction::None);
 
         /// Draws a piece of a sprite to the screen, similar to DrawSprite.
         /// @param texture
@@ -121,36 +107,20 @@ namespace JGL {
         /// @param color
         /// @param inversion
         void DrawPartialSprite(const Texture& texture, const Vector2& position, const Vector2& sub_texture_position, const Vector2& sub_texture_size, float rad_rotation = 0,
-                               const Vector2& origin = Vector2(0,0), const Vector2& scale = Vector2(1, 1), const Color4& color = Colors::White, Inversion inversion = Inversion::None);
+                               const Vector2& origin = Vector2(0,0), const Vector2& scale = Vector2(1, 1), const Color4& color = Colors::White, Direction inversion = Direction::None);
         void DrawPartialSprite(const Texture& texture, float positionX, float positionY, float sub_texture_positionX, float sub_texture_positionY, unsigned int sub_texture_sizeX, unsigned int sub_texture_sizeY,
-                               float rad_rotation = 0, float originX = 0, float originY = 0, float scaleX = 1, float scaleY = 1, const Color4& color = Colors::White, Inversion inversion = Inversion::None);
+                               float rad_rotation = 0, float originX = 0, float originY = 0, float scaleX = 1, float scaleY = 1, const Color4& color = Colors::White, Direction inversion = Direction::None);
 
-
-        /// Draws a non axis-aligned fill rect to the screen.
+        /// To save v-ram, Use if a sprite would be identical if mirrored horizontally, vertically, or both. For example, a circle.
+        /// Assumes the input texture is the top left quadrant. You can use "SoftwareTexture" to invert it correctly so that's the case.
+        /// @param texture
+        /// @param position
+        /// @param mirror_axis The axes to mirror across, Vertical and Horizontal or both only.
+        /// @param rad_rotation The rotation of the final result.
+        /// @param origin The point at which transformations are done about.
+        /// @param scale
         /// @param color
-        /// @param v1 top-left vertex.
-        /// @param v2 bottom-left vertex.
-        /// @param v3 bottom-right vertex.
-        /// @param v4 top-right vertex.
-        void FillQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4);
-
-        /// Draws a non axis-aligned outline rect to the screen.
-        /// @param color
-        /// @param v1 top-left vertex.
-        /// @param v2 bottom-left vertex.
-        /// @param v3 bottom-right vertex.
-        /// @param v4 top-right vertex.
-        /// @param thickness the thickness of the GL_LINES to be connected together.
-        void OutlineQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4, float thickness = 1);
-
-        /// Draws a filled rectangle on the screen.
-        void FillRect(const Color4& color, const Vector2& pos, const Vector2& size);
-
-        /// Draws a filled rectangle where the color transitions across it.
-        void FillGradientRect(const Color4& color1, const Color4& color2, const Gradient& gradient, const Vector2& pos, const Vector2& size);
-
-        /// Draws a filled rectangle with rounded corners on the screen.
-        void FillRoundedRect(const Color4& color, const Vector2 &pos, const Vector2 &size, float radius = 5, unsigned int subdivisions = 8);
+        void DrawMirrorSprite(const Texture& texture, const Vector2& position, Direction mirror_axis = Direction::Horizontal | Direction::Vertical, float rad_rotation = 0, const Vector2& origin = Vector2(0,0), const Vector2& scale = Vector2(1,1), const Color4& color = Colors::White);
 
         /// Draws an outline of a circle on the screen.
         void OutlineCircle(const Color4& color, const Vector2& center, float radius, unsigned int subdivisions = 16, float thickness = 1);
@@ -172,16 +142,15 @@ namespace JGL {
         /// Draws a triangle where each corner is defined by a given color, Smoothly transitioning between them.
         void FillGradientTriangle(const Color4& a_color, const Color4& b_color, const Color4& c_color, const Triangle2D& tri);
 
-
-        /// Draws a text string on the screen with a given point-size and font.
-        void DrawString(const Color4& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font);
-
         void DrawCubicBezierCurve(const Color4& color, const Vector2& controlA, const Vector2& pointA, const Vector2& pointB, const Vector2& controlB,
                                   int subdivisions = 10, float thickness = 1);
 
         /// Draws a series of points where the last point always connects to the first point.
         void OutlinePolygon(const Color4& color, const std::vector<Vector2>& points, float thickness = 1);
 
+        /// Draws a text string on the screen with a given point-size and font.
+        void DrawString(const Color4& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font);
+
         /// TODO Implement the following. These ones are going to be extremely annoying.
         void FillPolygon(const Color4& color, const std::vector<Vector2>& points);
         void FillTexturedPolygon();

include/JGL/logger/logger.h

@@ -8,4 +8,5 @@ namespace JGL::Logger {
     extern GenericLogger Fatal;
     extern GenericLogger Debug;
     extern GenericLogger Error;
+
 }

include/JGL/types/Enums.h

@@ -0,0 +1,36 @@
+#pragma once
+
+namespace JGL {
+    enum class Direction : u8 {
+        None = 0,
+        Vertical = 1,
+        Horizontal = 2,
+        Diagonal_NWSE = 3, // North West -> South East.
+        Diagonal_SWNE = 4 // South West -> North East.
+    };
+
+    inline Direction operator|(Direction a, Direction b) {
+        return static_cast<Direction>(static_cast<int>(a) | static_cast<int>(b));
+    }
+
+    inline bool operator&(Direction a, Direction b) {
+        return (u8)a & (u8)b;
+    }
+
+    static std::string to_string(JGL::Direction direction) {
+        switch (direction) {
+            case JGL::Direction::None:
+                return "None";
+            case JGL::Direction::Vertical:
+                return "Vertical";
+            case JGL::Direction::Horizontal:
+                return "Horizontal";
+            case JGL::Direction::Diagonal_NWSE:
+                return "Diagonal_NWSE";
+            case JGL::Direction::Diagonal_SWNE:
+                return "Diagonal_SWNE";
+            default:
+                return "Unknown";
+        }
+    }
+}

include/JGL/types/FontCache.h

@@ -1,9 +1,9 @@
 #pragma once
 
-#include <array>
-#include <map>
-#include <vector>
 #include <glad/glad.h>
+#include <vector>
+#include <array>
+#include <unordered_map>
 
 
 /// TODO: FontCache mechanism works amazing, but makes no fucking sense
@@ -27,13 +27,13 @@ public:
     //CachedGlyph(GLuint texture_id, char c);
     CachedGlyph(char c, std::array<GLfloat, 12> texcoords, float x2o, float y2o, float w, float h, float advX, float advY);
     char getCharacter();
-    [[nodiscard]] const std::array<GLfloat, 12> getTexCoords() const;
+    [[nodiscard]] std::array<GLfloat, 12> getTexCoords() const;
 };
 
 /// Represents a Font object as it exists in the font-cache.
 class JGL::CachedFont {
 private:
-    std::map<char, CachedGlyph*> glyphs;
+    std::unordered_map<char, CachedGlyph*> glyphs;
     GLuint texture = 0;
     GLsizei texture_width = 0, texture_height = 0;
     unsigned int font_size = 0;
@@ -43,7 +43,7 @@ public:
     unsigned int getFontSize();
     unsigned int getFontIndex();
     CachedGlyph* getGlyph(char c);
-    std::map<char, CachedGlyph*> getGlyphs();
+    std::unordered_map<char, CachedGlyph*> getGlyphs();
     const GLuint* getTexture();
     [[nodiscard]] GLsizei getTextureWidth() const;
     [[nodiscard]] GLsizei getTextureHeight() const;

include/JGL/types/RenderTarget.h

@@ -0,0 +1,37 @@
+#pragma once
+#include <glad/glad.h>
+#include <JGL/types/Texture.h>
+#include <Color4.hpp>
+#include <Colors.hpp>
+
+namespace JGL {
+    class RenderTarget;
+}
+
+class JGL::RenderTarget {
+private:
+    Color4 clear_color{0,0,0,0};
+    /// "Size" in this sense is the "Renderable Area" because OpenGL textures behave strangely if they're not square.
+    Vector2 size{0, 0};
+    bool using_depth = false;
+    GLuint framebuffer_object = 0;
+    GLuint depth_buffer = 0;
+    Texture* texture = nullptr;
+public:
+    static GLuint GetActiveGLFramebufferHandle();
+    static void SetActiveGLRenderTarget(const RenderTarget& render_target);
+public:
+    [[nodiscard]] Vector2 GetDimensions() const;
+    [[nodiscard]] Texture* GetJGLTexture() const;
+    [[nodiscard]] GLuint GetGLTextureHandle() const;
+    [[nodiscard]] GLuint GetGLFramebufferObjectHandle() const;
+    [[nodiscard]] GLuint GetGLDepthBufferHandle() const;
+    [[nodiscard]] Color4 GetClearColor() const;
+public:
+    /// Create a render target for a texture that already exists. For decals.
+    explicit RenderTarget(const Texture& texture, const Color4& clear_color = Colors::Black, bool use_depth = false);
+    /// Create a Render Target with a brand new texture. Want to render JGL elements onto a texture and display it as a sprite?
+    explicit RenderTarget(const Vector2& size,  const Color4& clear_color = Colors::Black, bool use_depth = false);
+
+    void Erase();
+};

include/JGL/types/Texture.h

@@ -32,18 +32,23 @@ namespace JGL {
         ReTexture::TextureFormat texture_format;
         TextureFilteringMode texture_filtering_mode;
         TextureWrappingMode texture_wrapping_mode;
-        virtual void load(SoftwareTexture* software_texture, const Vector2& size, const TextureFormat& format, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode);
+        void load(SoftwareTexture* software_texture, const Vector2& size, const TextureFormat& format, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode);
     public:
+        ///Load a texture from a file,
         explicit Texture(const std::string& file, TextureFilteringMode filtering_mode = TextureFilteringMode::BILINEAR, TextureWrappingMode wrapping_mode = TextureWrappingMode::CLAMP_TO_EDGE);
         Texture(const std::string& file, const TextureFlag& flags, TextureFilteringMode filtering_mode = TextureFilteringMode::BILINEAR, TextureWrappingMode wrapping_mode = TextureWrappingMode::CLAMP_TO_EDGE);
+        /* Initialize a texture filled with trash data
+        this is primarily for the RenderTarget */
+        explicit Texture(const Vector2& size);
         Texture() = default;
     public:
-        GLuint GetGLTextureHandle() const;
-        Vector2 GetDimensions() const;
-        TextureFilteringMode GetFilteringMode() const;
-        TextureFlag GetFlags() const;
-        TextureFormat GetFormat() const;
-        std::vector<Color4> GetPixelData() const;
+        [[nodiscard]] GLuint GetGLTextureHandle() const;
+        [[nodiscard]] Vector2 GetDimensions() const;
+        [[nodiscard]] TextureFilteringMode GetFilteringMode() const;
+        [[nodiscard]] TextureWrappingMode GetWrappingMode() const;
+        [[nodiscard]] TextureFlag GetFlags() const;
+        [[nodiscard]] TextureFormat GetFormat() const;
+        [[nodiscard]] std::vector<Color4> GetPixelData() const;
 
         void SetTextureHandle(GLuint handle);
         void Erase();

include/JGL/types/VRamList.h

@@ -0,0 +1,68 @@
+#pragma once
+#include <glad/glad.h>
+#include <J3ML/LinearAlgebra/Vector2.hpp>
+#include <J3ML/LinearAlgebra/Vector3.hpp>
+#include <J3ML/LinearAlgebra/Vector4.hpp>
+#include <JGL/logger/logger.h>
+#include <type_traits>
+#include <vector>
+#include <cstring>
+#include <string>
+
+namespace JGL {
+    class VRamList;
+}
+
+/// A wrapper for VBO, Storing texture coordinates or vertices or indices in vram.
+class JGL::VRamList {
+private:
+    GLuint list_handle = 0;
+    long size = 0;
+    bool element_array_buffer = false;
+
+    void load(const GLfloat* data, const long& size);
+    void load(const GLuint* data, const long& size);
+public:
+    VRamList() = default;
+    VRamList(const GLfloat* data, const long& size);
+    VRamList(Vector2* data, const long& size);
+    VRamList(Vector3* data, const long& size);
+    VRamList(Vector4* data, const long& size);
+    VRamList(const GLuint* data, const long& size);
+public:
+    [[nodiscard]] GLuint GetHandle() const;
+    /// Returns the number of GLfloat or GLuint in the list.
+    [[nodiscard]] long GetSize() const;
+    /// Returns the size of the data in bytes.
+    [[nodiscard]] long GetDataSize() const;
+    [[nodiscard]] bool IsIntegerArray() const;
+    [[nodiscard]] bool IsFloatArray() const;
+    void Erase();
+
+    /// Get list data back from the GPU. This is *very* slow.
+    /// It's not recommended you use this in your normal rendering routines.
+    template <typename T>
+    [[nodiscard]] std::vector<T> GetListData() const {
+        GLenum buffer_type;
+        GLint current_buffer = 0;
+
+        if constexpr (std::is_same<T, GLfloat>::value)
+            buffer_type = GL_ARRAY_BUFFER,
+            glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_buffer);
+        else if constexpr (std::is_same<T, GLuint>::value)
+            buffer_type = GL_ELEMENT_ARRAY_BUFFER,
+            glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_buffer);
+        else {
+            Logger::Fatal("Typename T must be either GLfloat or GLuint.");
+            exit(-1);
+        }
+
+        glBindBuffer(buffer_type, list_handle);
+        std::vector<T> data(size);
+        memcpy(data.data(), (T*) glMapBuffer(buffer_type, GL_READ_ONLY), size * sizeof(T));
+        glUnmapBuffer(buffer_type);
+        glBindBuffer(buffer_type, current_buffer);
+
+        return data;
+    }
+};

include/JGL/types/enums.h

@@ -1,33 +0,0 @@
-#pragma once
-
-namespace JGL {
-    enum class Inversion : u8 {
-        None = 0,
-        Vertical = 1,
-        Horizontal = 2,
-    };
-
-    inline Inversion operator|(Inversion a, Inversion b) {
-        return static_cast<Inversion>(static_cast<int>(a) | static_cast<int>(b));
-    }
-    inline bool operator&(Inversion a, Inversion b) {
-        return (u8)a & (u8)b;
-    }
-}
-
-namespace JGL {
-    enum class Gradient : u8 {
-        Vertical = 0,
-        Horizontal = 1,
-        DiagonalTopLeft = 2,
-        DiagonalBottomLeft = 4
-    };
-
-    inline Gradient operator|(Gradient a, Gradient b) {
-        return static_cast<Gradient>(static_cast<int>(a) | static_cast<int>(b));
-    }
-
-    inline bool operator&(Gradient a, Gradient b) {
-        return (u8)a & (u8)b;
-    }
-}

main.cpp

@@ -4,9 +4,6 @@
 #include <Colors.hpp>
 #include <chrono>
 #include <J3ML/LinearAlgebra/Vector2.hpp>
-#include <JGL/types/Font.h>
-#include <JGL/Logger.h>
-#include <ReTexture/Texture.h>
 
 using J3ML::LinearAlgebra::Vector2;
 using namespace JGL;
@@ -26,53 +23,31 @@ public:
 
     void Grab() {
         if (hovered)
-        {
             dragging = true;
-        }
     }
     void Release() {
         dragging = false;
     }
 
-    void Update(const Vector2& mouse)
-    {
+    void Update(const Vector2& mouse) {
         if (dragging)
-        {
             position = position.Lerp(mouse, 0.25f);
-        }
-
-        if (mouse.Distance(position) < range)
-        {
-            hovered = true;
-        } else
-        {
-            hovered = false;
-        }
 
+        hovered = mouse.Distance(position) < range;
     }
 
-    void Draw()
-    {
+    void Draw() {
         if (dragging)
-        {
             J2D::DrawPoint(Colors::White, position, 4.f);
-        } else if (hovered)
-        {
+        else if (hovered)
             J2D::DrawPoint(Colors::Reds::Crimson, position, 6.f);
-        } else
-        {
+        else
             J2D::DrawPoint(Colors::Reds::Salmon, position, 3.f);
-        }
 
         J2D::DrawString(Colors::White, std::format("{:.1f},{:.1f}", position.x, position.y), position.x, position.y, 1.f, 10, FreeSans);
     }
-protected:
-private:
 };
 
-
-Texture* image;
-
 class Camera {
 public:
     Vector3 position = {0,0,0};
@@ -111,13 +86,14 @@ struct point {
     GLfloat t;
 };
 
-
-
 Gizmo a({250, 150});
 Gizmo b({200, 250});
 Gizmo c({350, 300});
 Gizmo d({450, 250});
 
+Texture* image;
+RenderTarget* j2d_render_target;
+
 class JGLDemoWindow : public ReWindow::RWindow
 {
 public:
@@ -136,20 +112,18 @@ public:
         glDepthFunc(GL_LESS);
         glDepthMask(GL_TRUE);
         image = new Texture("assets/sprites/Re3D.png", TextureFilteringMode::BILINEAR);
+        j2d_render_target = new RenderTarget({500, 500}, {255,0,0,0});
     }
 
     Vector3 textAngle = {0,0,0};
     float fov = 90;
     float sprite_radians = 0;
     bool fov_increasing = true;
-    unsigned long long frames = 0;
-    bool framerate_measurement = false;
-    std::chrono::system_clock::time_point start;
-    float elapsed = 0.0f;
+    std::chrono::high_resolution_clock::time_point start;
+    float fps = 0.0f;
 
     void display() {
-        if (framerate_measurement)
-            start = std::chrono::high_resolution_clock::now();
+        start = std::chrono::high_resolution_clock::now();
 
         JGL::Update(getSize());
         if (fov_increasing)
@@ -170,7 +144,8 @@ public:
         glLoadIdentity();
 
         camera->render();
-        ///All 3D elements of the scene and JGL elements *must* be rendered before the 2d stuff.
+        // All 3D elements of the scene and JGL elements *must* be rendered before the 2D stuff
+        /* if rendering to screen space directly. */
 
         J3D::Begin();
             J3D::DrawLine(Colors::Red, {-0.33,-0.125,1}, {-1,-0.125,1});
@@ -178,20 +153,20 @@ public:
             J3D::DrawString(Colors::Red, "JGL Sample Text", {-0.33, -0.1, 1.0f}, 1.f, 32, FreeSans, textAngle, true);
         J3D::End();
 
+
         J2D::Begin();
-            J2D::FillQuad(Color4(Colors::Red), {500, 52}, {500, 152}, {600, 152}, {600, 52});
             J2D::FillRect(Colors::Blue, {0,52}, {100,100});
-            J2D::DrawSprite(*image, {252, 252}, sprite_radians, {0.5, 0.5});
-            J2D::DrawPartialSprite(*image, {200, 252}, image->GetDimensions() * 0.25, image->GetDimensions() * 0.75, sprite_radians, {0.5, 0.5});
+            J2D::DrawSprite(*image, {300, 300}, 0, {0,0}, {1, 1}, Colors::White, Direction::Vertical | Direction::Horizontal);
+            J2D::DrawMirrorSprite(*image, {400, 300}, Direction::Horizontal | Direction::Vertical, sprite_radians, {0.5,0.5}, {1, 1}, Colors::White);
+            J2D::DrawPartialSprite(*image, {225, 300}, image->GetDimensions() * 0.25, image->GetDimensions() * 0.75, sprite_radians, {0.5, 0.5});
             J2D::FillRect(Colors::Pinks::HotPink, {68, 120}, {32, 32});
-            J2D::FillGradientRect(Colors::Red, Colors::Blue, Gradient::DiagonalBottomLeft, {100,52}, {100,100});
+            J2D::FillGradientRect(Colors::Red, Colors::Blue, Direction::Diagonal_SWNE, {100,52}, {100,100});
             J2D::FillRoundedRect(Colors::Red, {200, 52}, {100, 100}, 8, 8);
             J2D::FillRoundedRect(Colors::Purples::BlueViolet, {300, 52}, {100, 100}, 8, 4);
 
             J2D::FillCircle(Colors::White, {52, 204}, 50, 24);
             J2D::OutlineCircle(Colors::White, {153, 204}, 50, 24);
 
-            //J2D::FillTriangle(Colors::Red, {{0, 275}, {0, 375}, {100, 375}});
             J2D::FillGradientTriangle(Color4(Colors::Red), Color4(Colors::Green), Color4(Colors::Blue), {{0, 275}, {0, 375}, {100, 375}});
             J2D::OutlineTriangle(Colors::Blue, {{100, 275}, {0, 275}, {100, 375}});
             J2D::DrawGradientLine(Colors::Red, Colors::Blue, {105, 375}, {200, 275}, 2);
@@ -201,6 +176,7 @@ public:
             J2D::DrawString(Colors::Green, "Jupteroid Font", 0.f, 0, 1.f, 16, Jupiteroid);
             J2D::DrawString(Colors::White, "Position: " + std::to_string(camera->position.x) + " " + std::to_string(camera->position.y) + " " + std::to_string(camera->position.z), 0, 16, 1,16, Jupiteroid);
             J2D::DrawString(Colors::White, "ViewAngle: " + std::to_string(camera->angle.x) + " " + std::to_string(camera->angle.y) + " " + std::to_string(camera->angle.z), 0, 33, 1,16, Jupiteroid);
+            J2D::DrawString(Colors::White, "Framerate: " + std::to_string((int) fps), 0, 48, 1, 16, Jupiteroid);
             J2D::OutlinePolygon(Colors::White, {{200, 400}, {220, 420}, {220, 430}, {230, 410}, {200, 400}});
             //J2D::FillPolygon(Colors::White, {{200, 400}, {220, 420}, {220, 430}, {230, 410}, {200, 400}});
             J2D::DrawCubicBezierCurve(Colors::Blues::CornflowerBlue,
@@ -216,21 +192,16 @@ public:
             d.Draw();
         J2D::End();
 
-        if (framerate_measurement) {
-            frames++;
-            std::chrono::system_clock::time_point stop = std::chrono::high_resolution_clock::now();
-            std::chrono::duration<float> frame_time = stop - start;
-            elapsed += frame_time.count();
-            if (elapsed >= 1)
-                std::cout << "Framerate: " << frames << std::endl,
-                frames = 0,
-                elapsed = 0,
-                framerate_measurement = false,
-                setVsyncEnabled(true);
-        } else if (isKeyDown(Keys::One))
-            framerate_measurement = true,
-            frames = 0,
-            setVsyncEnabled(false);
+        //Draw the Render Target that we just drew all that stuff onto.
+        /*
+        J2D::Begin();
+            J2D::DrawRenderTargetAsSprite(*j2d_render_target, {0, 0}, 0, {0.5, 0.5}, {1,1}, Colors::White);
+        J2D::End();
+         */
+
+        std::chrono::high_resolution_clock::time_point stop = std::chrono::high_resolution_clock::now();
+        std::chrono::duration<float> frame_time = stop - start;
+        fps = 1.0f / frame_time.count();
     }
 
     void OnRefresh(float elapsed) override {

src/JGL.cpp

@@ -4,12 +4,16 @@
 
 #include <JGL/JGL.h>
 #include <glad/glad.h>
-#include <Color3.hpp>
-#include <jlog/Logger.hpp>
 #include <J3ML/Algorithm/Bezier.hpp>
+#include <JGL/logger/logger.h>
 
+JGL::RenderTarget* render_target = nullptr;
 GLfloat oldColor[4] = {0, 0, 0, 1};
 GLfloat baseColor[4] = {1, 1, 1, 1};
+
+GLuint current_fbo = 0;
+GLint viewport[4] = {0, 0, 0, 0};
+
 bool inJ2D = false;
 bool inJ3D = false;
 bool wasTexture2DEnabled = false;
@@ -30,12 +34,26 @@ namespace JGL {
         glViewport(0, 0, (int) wS.x, (int) wS.y);
     }
 
-    void J2D::Begin() {
+#pragma region J2D
+    void J2D::Begin(RenderTarget* rt, bool clear_buffers) {
+        GLfloat old_clear_color[4];
+        if (rt != nullptr) {
+            render_target = rt;
+            glGetFloatv(GL_COLOR_CLEAR_VALUE, old_clear_color);
+            glGetIntegerv(GL_VIEWPORT, viewport);
+            current_fbo = JGL::RenderTarget::GetActiveGLFramebufferHandle();
+            JGL::RenderTarget::SetActiveGLRenderTarget(*rt);
+        }
         glMatrixMode(GL_PROJECTION);
         glPushMatrix();
         glLoadIdentity();
-        glViewport(0, 0, (int) wS.x, (int) wS.y);
-        glOrtho(0, wS.x, wS.y, 0, -1, 1);
+
+        if (rt == nullptr)
+            glViewport(0, 0, (int) wS.x, (int) wS.y),
+            glOrtho(0, wS.x, wS.y, 0, -1, 1);
+        else
+            glOrtho(0, rt->GetDimensions().x, rt->GetDimensions().y, 0, -1, 1);
+
         glMatrixMode(GL_MODELVIEW);
         glPushMatrix();
         glLoadIdentity();
@@ -44,7 +62,7 @@ namespace JGL {
         glGetFloatv(GL_CURRENT_COLOR, oldColor);
         glColor4fv(baseColor);
 
-        glGetIntegerv(GL_ACTIVE_TEXTURE,& activeTextureUnit);
+        glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTextureUnit);
         activeTextureUnit = activeTextureUnit - GL_TEXTURE0;
 
         if (activeTextureUnit != 0)
@@ -96,7 +114,13 @@ namespace JGL {
 
         if (!inJ3D)
             inJ2D = true;
-        else { jlog::Error("Attempt to Begin J2D inside of J3D context."); }
+        else { Logger::Error("Attempt to Begin J2D inside of J3D context."); }
+
+        if (rt != nullptr && clear_buffers) {
+            glClearColor(rt->GetClearColor().R(), rt->GetClearColor().G(), rt->GetClearColor().B(), rt->GetClearColor().A());
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+            glClearColor(old_clear_color[0], old_clear_color[1], old_clear_color[2], old_clear_color[3]);
+        }
     }
 
     void J2D::End() {
@@ -132,228 +156,34 @@ namespace JGL {
         //Put the draw color back how it was before.
         glColor4fv(oldColor);
 
+        if (render_target != nullptr) {
+            render_target = nullptr;
+            glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
+            glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
+        }
         inJ2D = false;
     }
 
-    void J2D::DrawSprite(const Texture& texture, const Vector2& pos, float rad_rotation, const Vector2& origin, const Vector2& scale, const Color4& color, Inversion inversion) {
+    void J2D::DrawPoint(const Color4& color, const Vector2& coordinates, float radius) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
+        Vector2 vertices[] = {coordinates};
 
-        const Vector2 size = texture.GetDimensions();
-
-        std::array<Vector2, 4> textureCoordinates = {Vector2(0, 0), Vector2(0, 1), Vector2(1, 1), Vector2(1, 0)};
-
-        // TODO: Kind of a mess, refactor to be more sensible later.
-        // Factors in scaling and origin correctly.
-        // i.e. to render at 2x size, from the center, at coords XY, use {2, 2} scale, and {0.5, 0.5} offset.
-        const Vector2 offset = origin * size;
-        Vector2 pos2 = pos - offset * scale;
-        Vector2 scaled_size = scale * size;
-        Vector2 size2 = scaled_size;
-        float cos_theta = std::cos(rad_rotation);
-        float sin_theta = std::sin(rad_rotation);
-
-        std::array<Vector2, 4> vertices =
-        {
-            pos2,                                 // Top-left vertex
-            {pos2.x, pos2.y + size2.y},            // Bottom-left
-            {pos2.x + size2.x, pos2.y + size2.y},   // Bottom-right
-            {pos2.x + size2.x, pos2.y}             // Top-right
-        };
-
-        //Rotate the vertices about the origin by float rad_rotation.
-        if (rad_rotation != 0)
-            for (auto& v : vertices)
-                v = { (v.x - pos2.x - offset.x * scale.x) * cos_theta - (v.y - pos2.y - offset.y * scale.y) * sin_theta + pos2.x + offset.x * scale.x, (v.x - pos2.x - offset.x * scale.x) * sin_theta + (v.y - pos2.y - offset.y * scale.y) * cos_theta + pos2.y + offset.y * scale.y};
-
-
-        if (inversion&  Inversion::Vertical)
-            textureCoordinates = {Vector2(0, 1), Vector2(0, 0), Vector2(1, 0), Vector2(1, 1)};
-        if (inversion&  Inversion::Horizontal)
-            textureCoordinates = {Vector2(1, 0), Vector2(1, 1), Vector2(0, 1), Vector2(0, 0)};
-        if ((inversion& Inversion::Horizontal) && (inversion& Inversion::Vertical))
-            textureCoordinates = {Vector2(1, 1), Vector2(1, 0), Vector2(0, 0), Vector2(0, 1)};
-
-        glColor4ubv(color.ptr());
-        glBindTexture(GL_TEXTURE_2D, texture.GetGLTextureHandle());
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
-        glTexCoordPointer(2, GL_FLOAT, sizeof(Vector2), textureCoordinates.data());
-        glDrawArrays(GL_QUADS, 0, 4);
-        glBindTexture(GL_TEXTURE_2D, 0);
-        glColor4fv(baseColor);
-    }
-
-
-    void J2D::DrawSprite(const Texture& texture, float positionX, float positionY, float rad_rotation, float originX, float originY, float scaleX, float scaleY, const Color4& color, Inversion inversion)
-    {
-        DrawSprite(texture,
-                   {positionX, positionY},
-                   rad_rotation,
-                   {originX, originY},
-                   {scaleX, scaleY},
-                   color, inversion);
-    }
-
-    void J2D::DrawPartialSprite(const Texture& texture, const Vector2& position, const Vector2& sub_texture_position, const Vector2& sub_texture_size, float rad_rotation, const Vector2& origin, const Vector2& scale, const Color4& color, Inversion inversion) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        const Vector2 textureSize = texture.GetDimensions();
-
-        // Calculate texture coordinates (relative to the whole texture)
-        std::array<GLfloat, 8> textureCoordinates = {
-                sub_texture_position.x / textureSize.x,
-                sub_texture_position.y / textureSize.y,
-                sub_texture_position.x / textureSize.x,
-                (sub_texture_position.y + sub_texture_size.y) / textureSize.y,
-                (sub_texture_position.x + sub_texture_size.x) / textureSize.x,
-                (sub_texture_position.y + sub_texture_size.y) / textureSize.y,
-                (sub_texture_position.x + sub_texture_size.x) / textureSize.x,
-                sub_texture_position.y / textureSize.y
-        };
-
-        if (inversion & Inversion::Vertical)
-            std::swap(textureCoordinates[1], textureCoordinates[3]),
-            std::swap(textureCoordinates[5], textureCoordinates[7]);
-
-        if (inversion & Inversion::Horizontal)
-            std::swap(textureCoordinates[0], textureCoordinates[6]),
-            std::swap(textureCoordinates[2], textureCoordinates[4]);
-
-        const Vector2 offset = origin * sub_texture_size;
-        Vector2 pos2 = position - offset * scale;
-        Vector2 scaled_size = scale * sub_texture_size;
-        Vector2 size2 = scaled_size;
-        float cos_theta = std::cos(rad_rotation);
-        float sin_theta = std::sin(rad_rotation);
-
-        std::array<Vector2, 4> vertices =
-        {
-            pos2,                                // Top-left
-            {pos2.x, pos2.y + size2.y},          // Bottom-left
-            {pos2.x + size2.x, pos2.y + size2.y},// Bottom-right
-            {pos2.x + size2.x, pos2.y}           // Top-right
-        };
-
-        //Rotate the vertices about the origin by float rad_rotation.
-        if (rad_rotation != 0)
-            for (auto& v : vertices)
-                v = { (v.x - pos2.x - offset.x * scale.x) * cos_theta - (v.y - pos2.y - offset.y * scale.y) * sin_theta + pos2.x + offset.x * scale.x, (v.x - pos2.x - offset.x * scale.x) * sin_theta + (v.y - pos2.y - offset.y * scale.y) * cos_theta + pos2.y + offset.y * scale.y};
-
-        glColor4ubv(color.ptr());
-        glBindTexture(GL_TEXTURE_2D, texture.GetGLTextureHandle());
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
-        glTexCoordPointer(2, GL_FLOAT, 0, textureCoordinates.data());
-        glDrawArrays(GL_QUADS, 0, 4);
-        glBindTexture(GL_TEXTURE_2D, 0);
-        glColor4fv(baseColor);
-    }
-
-    void J2D::DrawPartialSprite(const JGL::Texture& texture, float positionX, float positionY, float sub_texture_positionX, float sub_texture_positionY, unsigned int sub_texture_sizeX,
-                                unsigned int sub_texture_sizeY, float originX,float originY, float rad_rotation, float scaleX, float scaleY, const Color4& color,JGL::Inversion inversion) {
-
-        J2D::DrawPartialSprite(texture, {positionX, positionY}, {sub_texture_positionX, sub_texture_positionY},
-                               {(float) sub_texture_sizeX, (float) sub_texture_sizeY}, rad_rotation, {originX, originY}, {scaleX, scaleY}, color, inversion);
-    }
-
-    void J2D::FillQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        Vector2 vertices[4] = {v1, v2, v3, v4};
-
+        glPointSize(radius);
         glColor4ubv(color.ptr());
         glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
-        glDrawArrays(GL_QUADS, 0, 4);
+        glDrawArrays(GL_POINTS, 0, 1);
         glColor4fv(baseColor);
     }
 
-    void J2D::OutlineQuad(const Color4& color, const Vector2& v1, const Vector2& v2, const Vector2& v3, const Vector2& v4, float thickness) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        Vector2 vertices[] = {v1, v2, v3, v4};
-        glLineWidth(thickness);
-        glColor4ubv(color.ptr());
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
-        glDrawArrays(GL_LINE_LOOP, 0, 4);
-        glColor4fv(baseColor);
-    }
-
-    void J2D::FillRect(const Color4& color, const Vector2& pos, const Vector2& size) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
-        glColor4ubv(color.ptr());
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
-        glDrawArrays(GL_QUADS, 0, 4);
-        glColor4fv(baseColor);
-    }
-
-    void J2D::FillGradientRect(const Color4& color1, const Color4& color2, const Gradient& gradient, const Vector2& pos, const Vector2& size) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
-        std::vector<GLfloat> colors{};
-
-        if (gradient == Gradient::Horizontal)
-            colors = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(), color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(),
-                      color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(), color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized()};
-
-        else if (gradient == Gradient::Vertical)
-            colors = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(), color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(),
-                      color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(), color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized()};
-
-        else if (gradient == Gradient::DiagonalBottomLeft)
-            colors = {(color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f, (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f, (color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f,
-                      color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(), (color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f,
-                      (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f, (color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f, color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized()};
-
-        else if (gradient == Gradient::DiagonalTopLeft)
-            colors = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(),(color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f,
-                      (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f, (color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f, color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(),
-                      (color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f, (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f,(color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f};
-
-        glEnableClientState(GL_COLOR_ARRAY);
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
-        glColorPointer(4, GL_FLOAT, 0, colors.data());
-        glDrawArrays(GL_QUADS, 0, 4);
-        glDisableClientState(GL_COLOR_ARRAY);
-        glColor4fv(baseColor);
-    }
-
-    void J2D::FillRoundedRect(const Color4& color, const Vector2& pos, const Vector2& size, float radius, unsigned int subdivisions) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        J2D::FillRect(color, {pos.x + radius, pos.y}, {size.x - 2 * radius, size.y});
-        J2D::FillRect(color, {pos.x, pos.y + radius}, {size.x, size.y - 2 * radius});
-
-        J2D::FillCircle(color, {pos.x + radius, pos.y + radius}, radius, subdivisions);
-        J2D::FillCircle(color, {pos.x + size.x - radius, pos.y + radius}, radius, subdivisions);
-        J2D::FillCircle(color, {pos.x + radius, pos.y + size.y - radius}, radius, subdivisions);
-        J2D::FillCircle(color, {pos.x + size.x - radius, pos.y + size.y - radius}, radius, subdivisions);
-    }
-
-    void J2D::OutlineRect(const Color4& color, const Vector2& pos, const Vector2& size, float thickness) {
-        if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
-
-        Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
-
-        glLineWidth(thickness);
-        glColor4ubv(color.ptr());
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
-        glDrawArrays(GL_LINE_LOOP, 0, 4);
-        glColor4fv(baseColor);
+    void J2D::DrawPoint(const Color4& color, float x, float y, float radius) {
+        DrawPoint(color, {x, y}, radius);
     }
 
     void J2D::DrawLine(const Color4& color, const Vector2& A, const Vector2& B, float thickness) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
         Vector2 vertices[] = {A, B};
 
         glLineWidth(thickness);
@@ -369,7 +199,7 @@ namespace JGL {
 
     void J2D::DrawGradientLine(const Color4& color1, const Color4& color2, const Vector2& A, const Vector2& B, float thickness) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
         Vector2 vertices[] = {A, B};
         GLfloat colors[8] = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(),
@@ -388,40 +218,299 @@ namespace JGL {
         J2D::DrawGradientLine(color1, color2, {x, y}, {w, h}, thickness);
     }
 
-    void J2D::OutlinePolygon(const Color4 &color, const std::vector<Vector2>& points, float thickness) {
+    void J2D::OutlineRect(const Color4& color, const Vector2& pos, const Vector2& size, float thickness) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
-        if (points.front() != points.back())
-            throw std::runtime_error("J2D::OutlinePolygon: The first point and the last point must connect.");
+        Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
 
         glLineWidth(thickness);
         glColor4ubv(color.ptr());
-        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), points.data());
-        glDrawArrays(GL_LINE_LOOP, 0, (int) points.size());
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
+        glDrawArrays(GL_LINE_LOOP, 0, 4);
         glColor4fv(baseColor);
     }
 
-    void J2D::DrawPoint(const Color4& color, const Vector2& coordinates, float radius) {
+    void J2D::FillRect(const Color4& color, const Vector2& pos, const Vector2& size) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
-        Vector2 vertices[] = {coordinates};
-
-        glPointSize(radius);
+        Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
         glColor4ubv(color.ptr());
         glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
-        glDrawArrays(GL_POINTS, 0, 1);
+        glDrawArrays(GL_QUADS, 0, 4);
         glColor4fv(baseColor);
     }
 
-    void J2D::DrawPoint(const Color4& color, float x, float y, float radius) {
-        DrawPoint(color, {x, y}, radius);
+    void J2D::FillGradientRect(const Color4& color1, const Color4& color2, const Direction& gradient, const Vector2& pos, const Vector2& size) {
+        if (!inJ2D)
+            Logger::Error("Drawing J2D element before J2D begin.");
+
+        Vector2 vertices[] = {{pos.x, pos.y}, {pos.x, pos.y + size.y}, {pos.x + size.x, pos.y + size.y}, {pos.x + size.x, pos.y}};
+        std::vector<GLfloat> colors{};
+
+        if (gradient == Direction::Horizontal)
+            colors = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(), color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(),
+                      color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(), color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized()};
+
+        else if (gradient == Direction::Vertical)
+            colors = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(), color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(),
+                      color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(), color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized()};
+
+        else if (gradient == Direction::Diagonal_SWNE)
+            colors = {(color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f, (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f, (color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f,
+                      color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(), (color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f,
+                      (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f, (color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f, color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized()};
+
+        else if (gradient == Direction::Diagonal_NWSE)
+            colors = {color1.RedChannelNormalized(), color1.GreenChannelNormalized(), color1.BlueChannelNormalized(), color1.AlphaChannelNormalized(),(color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f,
+                      (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f, (color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f, color2.RedChannelNormalized(), color2.GreenChannelNormalized(), color2.BlueChannelNormalized(), color2.AlphaChannelNormalized(),
+                      (color1.RedChannelNormalized() + color2.RedChannelNormalized()) / 2.f, (color1.GreenChannelNormalized() + color2.GreenChannelNormalized()) / 2.f, (color1.BlueChannelNormalized() + color2.BlueChannelNormalized()) / 2.f,(color1.AlphaChannelNormalized() + color2.AlphaChannelNormalized()) / 2.f};
+
+        glEnableClientState(GL_COLOR_ARRAY);
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices);
+        glColorPointer(4, GL_FLOAT, 0, colors.data());
+        glDrawArrays(GL_QUADS, 0, 4);
+        glDisableClientState(GL_COLOR_ARRAY);
+        glColor4fv(baseColor);
+    }
+
+    void J2D::FillRoundedRect(const Color4& color, const Vector2& pos, const Vector2& size, float radius, unsigned int subdivisions) {
+        if (!inJ2D)
+            Logger::Error("Drawing J2D element before J2D begin.");
+
+        J2D::FillRect(color, {pos.x + radius, pos.y}, {size.x - 2 * radius, size.y});
+        J2D::FillRect(color, {pos.x, pos.y + radius}, {size.x, size.y - 2 * radius});
+
+        J2D::FillCircle(color, {pos.x + radius, pos.y + radius}, radius, subdivisions);
+        J2D::FillCircle(color, {pos.x + size.x - radius, pos.y + radius}, radius, subdivisions);
+        J2D::FillCircle(color, {pos.x + radius, pos.y + size.y - radius}, radius, subdivisions);
+        J2D::FillCircle(color, {pos.x + size.x - radius, pos.y + size.y - radius}, radius, subdivisions);
+    }
+
+    void
+    J2D::DrawRenderTargetAsSprite(const JGL::RenderTarget& rt, const Vector2& position, float rad_rotation, const Vector2& origin,
+                                  const Vector2& scale, const Color4& color, Direction inversion) {
+
+        //Correct for the render-target being upside-down.
+        Direction d{};
+        if (inversion == Direction::None)
+            d = Direction::Vertical;
+        else if (inversion == Direction::Horizontal)
+            d = Direction::Horizontal | Direction::Vertical;
+        else if (inversion& Direction::Horizontal && inversion& Direction::Vertical)
+            d = Direction::Horizontal;
+
+        //Change the blending mode such that the alpha doesn't get multiplied again.
+        glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+        //J2D::DrawSprite(*rt.GetJGLTexture(), position, rad_rotation, origin, scale, color, d);
+        J2D::DrawPartialSprite(*rt.GetJGLTexture(), position, {0, 0}, rt.GetDimensions(), rad_rotation, origin, scale, color, d);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    }
+    void J2D::DrawSprite(const Texture& texture, const Vector2& pos, float rad_rotation, const Vector2& origin,
+                         const Vector2& scale, const Color4& color, Direction inversion) {
+        if (!inJ2D)
+            Logger::Error("Drawing J2D element before J2D begin.");
+
+
+        const Vector2 size = texture.GetDimensions();
+
+        std::array<Vector2, 4> textureCoordinates = {Vector2(0, 0), Vector2(0, 1), Vector2(1, 1), Vector2(1, 0)};
+
+        // TODO: Kind of a mess, refactor to be more sensible later.
+        // Factors in scaling and origin correctly.
+        // i.e. to render at 2x size, from the center, at coords XY, use {2, 2} scale, and {0.5, 0.5} offset.
+        const Vector2 offset = origin * size;
+        Vector2 pos2 = pos;
+        Vector2 scaled_size = scale * size;
+        Vector2 size2 = scaled_size;
+        float cos_theta = std::cos(rad_rotation);
+        float sin_theta = std::sin(rad_rotation);
+
+        std::array<Vector2, 4> vertices =
+                {
+                        pos2,                                 // Top-left vertex
+                        {pos2.x, pos2.y + size2.y},            // Bottom-left
+                        {pos2.x + size2.x, pos2.y + size2.y},   // Bottom-right
+                        {pos2.x + size2.x, pos2.y}             // Top-right
+                };
+
+        //Rotate the vertices about the origin by float rad_rotation.
+        if (rad_rotation != 0)
+            for (auto& v: vertices)
+                v = {(v.x - pos2.x - offset.x * scale.x) * cos_theta - (v.y - pos2.y - offset.y * scale.y) * sin_theta +
+                     pos2.x + offset.x * scale.x,
+                     (v.x - pos2.x - offset.x * scale.x) * sin_theta + (v.y - pos2.y - offset.y * scale.y) * cos_theta +
+                     pos2.y + offset.y * scale.y
+                    };
+
+
+        if (inversion& Direction::Vertical)
+            textureCoordinates = {Vector2(0, 1), Vector2(0, 0), Vector2(1, 0), Vector2(1, 1)};
+        if (inversion& Direction::Horizontal)
+            textureCoordinates = {Vector2(1, 0), Vector2(1, 1), Vector2(0, 1), Vector2(0, 0)};
+        if ((inversion& Direction::Horizontal) && (inversion& Direction::Vertical))
+            textureCoordinates = {Vector2(1, 1), Vector2(1, 0), Vector2(0, 0), Vector2(0, 1)};
+
+        glColor4ubv(color.ptr());
+        glBindTexture(GL_TEXTURE_2D, texture.GetGLTextureHandle());
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
+        glTexCoordPointer(2, GL_FLOAT, sizeof(Vector2), textureCoordinates.data());
+        glDrawArrays(GL_QUADS, 0, 4);
+        glBindTexture(GL_TEXTURE_2D, 0);
+        glColor4fv(baseColor);
+    }
+
+
+    void J2D::DrawSprite(const Texture& texture, float positionX, float positionY, float rad_rotation, float originX,
+                         float originY, float scaleX, float scaleY, const Color4& color, Direction inversion) {
+        DrawSprite(texture,
+                   {positionX, positionY},
+                   rad_rotation,
+                   {originX, originY},
+                   {scaleX, scaleY},
+                   color, inversion);
+    }
+
+    void J2D::DrawPartialSprite(const Texture& texture, const Vector2 &position, const Vector2& sub_texture_position,
+                                const Vector2& sub_texture_size, float rad_rotation, const Vector2& origin,
+                                const Vector2& scale, const Color4& color, Direction inversion) {
+        if (!inJ2D)
+            Logger::Error("Drawing J2D element before J2D begin.");
+
+        const Vector2 textureSize = texture.GetDimensions();
+
+        // Calculate texture coordinates (relative to the whole texture)
+        std::array<GLfloat, 8> textureCoordinates = {
+                sub_texture_position.x / textureSize.x,
+                sub_texture_position.y / textureSize.y,
+                sub_texture_position.x / textureSize.x,
+                (sub_texture_position.y + sub_texture_size.y) / textureSize.y,
+                (sub_texture_position.x + sub_texture_size.x) / textureSize.x,
+                (sub_texture_position.y + sub_texture_size.y) / textureSize.y,
+                (sub_texture_position.x + sub_texture_size.x) / textureSize.x,
+                sub_texture_position.y / textureSize.y
+        };
+
+        if (inversion& Direction::Vertical)
+            std::swap(textureCoordinates[1], textureCoordinates[3]),
+            std::swap(textureCoordinates[5], textureCoordinates[7]);
+
+        if (inversion& Direction::Horizontal)
+            std::swap(textureCoordinates[0], textureCoordinates[6]),
+            std::swap(textureCoordinates[2], textureCoordinates[4]);
+
+        const Vector2 offset = origin * sub_texture_size;
+        Vector2 pos2 = position;
+        Vector2 scaled_size = scale * sub_texture_size;
+        Vector2 size2 = scaled_size;
+        float cos_theta = std::cos(rad_rotation);
+        float sin_theta = std::sin(rad_rotation);
+
+        std::array<Vector2, 4> vertices =
+                {
+                        pos2,                                // Top-left
+                        {pos2.x, pos2.y + size2.y},          // Bottom-left
+                        {pos2.x + size2.x, pos2.y + size2.y},// Bottom-right
+                        {pos2.x + size2.x, pos2.y}           // Top-right
+                };
+
+        //Rotate the vertices about the origin by float rad_rotation.
+        if (rad_rotation != 0)
+            for (auto& v: vertices)
+                v = {(v.x - pos2.x - offset.x * scale.x) * cos_theta - (v.y - pos2.y - offset.y * scale.y) * sin_theta +
+                     pos2.x + offset.x * scale.x,
+                     (v.x - pos2.x - offset.x * scale.x) * sin_theta + (v.y - pos2.y - offset.y * scale.y) * cos_theta +
+                     pos2.y + offset.y * scale.y};
+
+        glColor4ubv(color.ptr());
+        glBindTexture(GL_TEXTURE_2D, texture.GetGLTextureHandle());
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
+        glTexCoordPointer(2, GL_FLOAT, 0, textureCoordinates.data());
+        glDrawArrays(GL_QUADS, 0, 4);
+        glBindTexture(GL_TEXTURE_2D, 0);
+        glColor4fv(baseColor);
+    }
+
+    void
+    J2D::DrawPartialSprite(const JGL::Texture& texture, float positionX, float positionY, float sub_texture_positionX,
+                           float sub_texture_positionY, unsigned int sub_texture_sizeX,
+                           unsigned int sub_texture_sizeY, float originX, float originY, float rad_rotation,
+                           float scaleX, float scaleY, const Color4& color, JGL::Direction inversion) {
+
+        J2D::DrawPartialSprite(texture, {positionX, positionY}, {sub_texture_positionX, sub_texture_positionY},
+                               {(float) sub_texture_sizeX, (float) sub_texture_sizeY}, rad_rotation, {originX, originY},
+                               {scaleX, scaleY}, color, inversion);
+    }
+
+    void J2D::DrawMirrorSprite(const Texture& texture, const Vector2& position, Direction mirror_axis, float rad_rotation, const Vector2& origin, const Vector2& scale, const Color4& color) {
+        if (!inJ2D)
+            Logger::Error("Drawing J2D element before J2D begin.");
+
+        if (mirror_axis == Direction::None)
+            Logger::Warning("Drawing non-mirrored sprite with J2D::DrawMirrorSprite?");
+
+        glBindTexture(GL_TEXTURE_2D, texture.GetGLTextureHandle());
+        Vector2 size = texture.GetDimensions();
+        std::array<Vector2, 4> textureCoordinates  = {Vector2(0, 0), Vector2(0, 1), Vector2(1, 1), Vector2(1, 0)};
+
+        if (mirror_axis& Direction::Horizontal)
+            size.x *= 2,
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT),
+            textureCoordinates = {Vector2(0, 0), Vector2(0, 1), Vector2(2, 1), Vector2(2, 0)};
+
+        if (mirror_axis& Direction::Vertical)
+            size.y *= 2,
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT),
+            textureCoordinates = {Vector2(0, 0), Vector2(0, 2), Vector2(1, 2), Vector2(1, 0)};
+
+        if ((mirror_axis& Direction::Horizontal) && (mirror_axis& Direction::Vertical))
+            textureCoordinates = {Vector2(0, 0), Vector2(0, 2), Vector2(2, 2), Vector2(2, 0)};
+
+        const Vector2 offset = origin * size;
+        Vector2 pos2 = position;
+        Vector2 size2 = scale * size;
+        float cos_theta = std::cos(rad_rotation);
+        float sin_theta = std::sin(rad_rotation);
+
+        std::array<Vector2, 4> vertices =
+                {
+                    pos2,
+                    {pos2.x, pos2.y + size2.y},
+                    {pos2.x + size2.x, pos2.y + size2.y},
+                    {pos2.x + size2.x, pos2.y}
+                };
+
+        if (rad_rotation != 0)
+            for (auto& v : vertices)
+                v = {
+                        (v.x - pos2.x - offset.x * scale.x) * cos_theta - (v.y - pos2.y - offset.y * scale.y) * sin_theta + pos2.x + offset.x * scale.x,
+                        (v.x - pos2.x - offset.x * scale.x) * sin_theta + (v.y - pos2.y - offset.y * scale.y) * cos_theta + pos2.y + offset.y * scale.y
+                };
+
+        glColor4ubv(color.ptr());
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
+        glTexCoordPointer(2, GL_FLOAT, sizeof(Vector2), textureCoordinates.data());
+        glDrawArrays(GL_QUADS, 0, 4);
+
+        //Reset the wrapping mode.
+        if (texture.GetWrappingMode() == TextureWrappingMode::CLAMP_TO_EDGE)
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE),
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        else if (texture.GetWrappingMode() == TextureWrappingMode::REPEAT)
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT),
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+        else if (texture.GetWrappingMode() == TextureWrappingMode::CLAMP_TO_BORDER)
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER),
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+
+        glBindTexture(GL_TEXTURE_2D, 0);
+        glColor4fv(baseColor);
     }
 
     void J2D::OutlineCircle(const Color4& color, const Vector2& center, float radius, unsigned int subdivisions, float thickness) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
         float step = (2.f * Math::Pi) / (float) subdivisions;
         std::vector<Vector2> vertices{};
@@ -442,17 +531,15 @@ namespace JGL {
 
     void J2D::FillCircle(const Color4& color, const Vector2& center, float radius, unsigned int subdivisions) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
         GLfloat angle, x, y;
         float step =  (2.f * Math::Pi) / (float) subdivisions;
         std::vector<Vector2> vertices{};
-
         for (angle = 0.0f; angle < (2.f * Math::Pi); angle += step)
                 x = radius * std::sin(angle) + center.x,
                 y = radius * std::cos(angle) + center.y,
                 vertices.emplace_back(x, y);
-
         glColor4ubv(color.ptr());
         glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
         glDrawArrays(GL_TRIANGLE_FAN, 0, (int) vertices.size());
@@ -461,7 +548,7 @@ namespace JGL {
 
     void J2D::OutlineTriangle(const Color4& color, const Triangle2D& tri, float thickness) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
         Vector2 vertices[] = {{tri.A.x, tri.A.y}, {tri.B.x, tri.B.y}, {tri.C.x, tri.C.y}};
 
@@ -474,7 +561,7 @@ namespace JGL {
 
     void J2D::FillTriangle(const Color4& color, const Triangle2D& tri) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
         Vector2 vertices[] = {{tri.A.x, tri.A.y}, {tri.B.x, tri.B.y}, {tri.C.x, tri.C.y}};
 
@@ -486,7 +573,7 @@ namespace JGL {
 
     void J2D::FillGradientTriangle(const Color4& a_color, const Color4& b_color, const Color4& c_color, const Triangle2D& tri) {
         if (!inJ2D)
-            jlog::Error("Drawing J2D element before J2D begin.");
+            Logger::Error("Drawing J2D element before J2D begin.");
 
         Vector2 vertices[] = {{tri.A.x, tri.A.y}, {tri.B.x, tri.B.y}, {tri.C.x, tri.C.y}};
         GLfloat colors[] = {a_color.RedChannelNormalized(), a_color.GreenChannelNormalized(), a_color.BlueChannelNormalized(), a_color.AlphaChannelNormalized(),
@@ -519,15 +606,31 @@ namespace JGL {
         DrawLine(color, last, first, thickness);
     }
 
-    //The 3D projection.
-    std::vector<GLfloat> perspective(float fov, float aspect, float nearPlane, float farPlane) {
-        std::vector<float> result(16);
-        float f = 1.0f / std::tan(fov * 0.5f * Math::Pi / 180.0f);
+    void J2D::OutlinePolygon(const Color4 &color, const std::vector<Vector2>& points, float thickness) {
+        if (!inJ2D)
+            Logger::Error("Drawing J2D element before J2D begin.");
+
+        if (points.front() != points.back())
+            throw std::runtime_error("J2D::OutlinePolygon: The first point and the last point must connect.");
+
+        glLineWidth(thickness);
+        glColor4ubv(color.ptr());
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), points.data());
+        glDrawArrays(GL_LINE_LOOP, 0, (int) points.size());
+        glColor4fv(baseColor);
+    }
+
+#pragma endregion
+
+#pragma region J3D
+    std::vector<GLfloat> OpenGLPerspectiveProjectionRH(float fovY, float aspect, float z_near, float z_far) {
+        std::vector<GLfloat> result(16);
+        GLfloat f = 1.0f / std::tan(fovY * 0.5f * Math::Pi / 180.0f);
         result[0] = f / aspect;
         result[5] = f;
-        result[10] = (farPlane + nearPlane) / (nearPlane - farPlane);
+        result[10] = (z_far + z_near) / (z_near - z_far);
         result[11] = -1.0f;
-        result[14] = (2.0f * farPlane * nearPlane) / (nearPlane - farPlane);
+        result[14] = (2.0f * z_far * z_near) / (z_near - z_far);
         return result;
     }
 
@@ -557,7 +660,7 @@ namespace JGL {
         auto aspect = (float) wS.x / (float) wS.y;
         glMatrixMode(GL_PROJECTION);
         glLoadIdentity();
-        glMultMatrixf(perspective(j3d_fov, aspect, 0.001, j3d_far_plane).data());
+        glMultMatrixf(OpenGLPerspectiveProjectionRH(j3d_fov, aspect, 0.001, j3d_far_plane).data());
         glMatrixMode(GL_MODELVIEW);
 
         //Get what the draw color was before we did anything.
@@ -574,6 +677,13 @@ namespace JGL {
             wasVertexArraysEnabled = false,
             glEnableClientState(GL_VERTEX_ARRAY);
 
+        if (!glIsEnabled(GL_TEXTURE_COORD_ARRAY))
+            wasTextureCoordArrayEnabled = false,
+            glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        else
+            wasTextureCoordArrayEnabled = true;
+
+
         wasTexture2DEnabled = true;
         if (!glIsEnabled(GL_TEXTURE_2D))
             wasTexture2DEnabled = false,
@@ -584,18 +694,17 @@ namespace JGL {
             wasCullFaceEnabled = true,
             glDisable(GL_CULL_FACE);
 
-        wasBlendEnabled = true;
         if (!glIsEnabled(GL_BLEND))
             wasBlendEnabled = false,
             glEnable(GL_BLEND),
             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-
+        else
+            wasBlendEnabled = true;
 
         if (!inJ2D)
             inJ3D = true;
         else
-            jlog::Error("Can't begin J3D context inside J2D context.");
+            Logger::Error("Can't begin J3D context inside J2D context.");
     }
 
     void J3D::End() {
@@ -614,6 +723,9 @@ namespace JGL {
         if (wasCullFaceEnabled)
             glEnable(GL_CULL_FACE);
 
+        if (!wasTextureCoordArrayEnabled)
+            glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+
         //Put the draw color back how it was before.
         glColor4fv(oldColor);
         inJ3D = false;
@@ -621,7 +733,7 @@ namespace JGL {
 
     void J3D::DrawLine(const Color4& color, const Vector3& A, const Vector3& B, float thickness) {
         if (!inJ3D)
-            jlog::Error("Attempt to Render J3D element before J3D begin.");
+            Logger::Error("Attempt to Render J3D element before J3D begin.");
 
         Vector3 vertices[] = {A, B};
 
@@ -631,4 +743,5 @@ namespace JGL {
         glDrawArrays(GL_LINES, 0, 2);
         glColor4fv(baseColor);
     }
+#pragma endregion
 }

src/TextRendering.cpp

@@ -15,101 +15,96 @@
 
 #include <JGL/types/Font.h>
 #include <JGL/types/FontCache.h>
-#include <JGL/Logger.h>
+#include "JGL/logger/logger.h"
 
 namespace JGL {
+    CachedFont* CacheFont(const Font& font, u32 size) {
+        CachedFont* cachedFont;
+        FT_Set_Pixel_Sizes(font.face, 0, size);
+        jlog::Debug("Caching font data...");
+        GLuint texture_id;
+        glGenTextures(1, &texture_id);
+        glBindTexture(GL_TEXTURE_2D, texture_id);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
 
-    void PurgeFontCache() {
-        fontCache.purgeCache();
+        GLsizei width = 0;
+        GLsizei max_height = 0;
+        FT_ULong charcode;
+        FT_UInt gindex;
+
+        //We have to loop over the available glyphs twice as we need the
+        //final width and height of the texture_handle before we can construct it
+        //and subsequently upload the glyph data.
+        charcode = FT_Get_First_Char(font.face, &gindex);
+        //Strings are char-based so we only handle charcodes within the extended ASCII range.
+        while (gindex != 0 && charcode < 255) {
+            if (FT_Load_Char(font.face, charcode, FT_LOAD_RENDER))
+                std::cout << "Error::FREETYPE: Failed to load charcode: " << charcode << std::endl;
+
+            FT_GlyphSlot g = font.face->glyph;
+            width += g->bitmap.width;
+            max_height = std::max(max_height, (GLsizei) g->bitmap.rows);
+            charcode = FT_Get_Next_Char(font.face, charcode, &gindex);
+        }
+
+        fontCache.newFont(texture_id, width, max_height, size, font.index);
+        cachedFont = fontCache.getFont(size, font.index);
+
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, max_height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, nullptr);
+
+        GLsizei xoffset = 0;
+
+        charcode = FT_Get_First_Char(font.face, &gindex);
+        while (gindex != 0 && charcode < 255) {
+            if (FT_Load_Char(font.face, charcode, FT_LOAD_RENDER))
+                std::cout << "Error::FREETYPE: Failed to load charcode: " << charcode << std::endl;
+
+            FT_GlyphSlot g = font.face->glyph;
+            glTexSubImage2D(GL_TEXTURE_2D, 0, xoffset, 0, g->bitmap.width, g->bitmap.rows, GL_ALPHA, GL_UNSIGNED_BYTE, g->bitmap.buffer);
+
+            GLfloat u0 = (GLfloat)xoffset / cachedFont->getTextureWidth();
+            GLfloat u1 = u0 + (GLfloat)g->bitmap.width / cachedFont->getTextureWidth();
+
+            GLfloat v0 = 0.0f;
+            GLfloat v1 = (GLfloat)g->bitmap.rows / cachedFont->getTextureHeight();
+
+            std::array<GLfloat, 12> texcoords
+            {
+                u0, v0,
+                u0, v1,
+                u1, v1,
+                u0, v0,
+                u1, v1,
+                u1, v0
+            };
+
+            cachedFont->appendGlyph(new CachedGlyph((char)charcode, texcoords, g->bitmap_left, g->bitmap_top, g->bitmap.width, g->bitmap.rows, (g->advance.x >> 6), (g->advance.y >> 6)));
+
+            xoffset += g->bitmap.width;
+            charcode = FT_Get_Next_Char(font.face, charcode, &gindex);
+        }
+        return cachedFont;
     }
 
     void J2D::DrawString(const Color4& color, const std::string& text, float x, float y, float scale, u32 size, const Font& font) {
-        glUseProgram(0); // Fixed-function pipeline.
-
         // Offset by height to render at "correct" location.
         y += size;
 
         CachedFont* cachedFont = fontCache.getFont(size, font.index);
 
         if (font.face == nullptr)
-            return;
-
-        FT_Set_Pixel_Sizes(font.face, 0, size);
+            jlog::Fatal("Drawing a string with an uninitialized font?");
 
         //If the font doesn't exist in the cache yet.
-        if (!cachedFont) {
-            jlog::Debug("Caching font data...");
-            GLuint texture_id;
-            glGenTextures(1, &texture_id);
-            glBindTexture(GL_TEXTURE_2D, texture_id);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
-
-            GLsizei width = 0;
-            GLsizei max_height = 0;
-
-            FT_ULong charcode;
-            FT_UInt gindex;
-
-            //We have to loop over the available glyphs twice as we need the
-            //final width and height of the texture_handle before we can construct it
-            //and subsequently upload the glyph data.
-
-            charcode = FT_Get_First_Char(font.face, &gindex);
-            //Strings are char-based so we only handle charcodes within the extended ASCII range.
-            while (gindex != 0 && charcode < 255) {
-                if (FT_Load_Char(font.face, charcode, FT_LOAD_RENDER))
-                    std::cout << "Error::FREETYPE: Failed to load charcode: " << charcode << std::endl;
-
-                FT_GlyphSlot g = font.face->glyph;
-                width += g->bitmap.width;
-                max_height = std::max(max_height, (GLsizei) g->bitmap.rows);
-                charcode = FT_Get_Next_Char(font.face, charcode, &gindex);
-            }
-
-            fontCache.newFont(texture_id, width, max_height, size, font.index);
-            cachedFont = fontCache.getFont(size, font.index);
-
-            glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, max_height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, nullptr);
-
-            GLsizei xoffset = 0;
-
-            charcode = FT_Get_First_Char(font.face, &gindex);
-            while (gindex != 0 && charcode < 255) {
-                if (FT_Load_Char(font.face, charcode, FT_LOAD_RENDER))
-                    std::cout << "Error::FREETYPE: Failed to load charcode: " << charcode << std::endl;
-
-                FT_GlyphSlot g = font.face->glyph;
-                glTexSubImage2D(GL_TEXTURE_2D, 0, xoffset, 0, g->bitmap.width, g->bitmap.rows, GL_ALPHA, GL_UNSIGNED_BYTE, g->bitmap.buffer);
-
-                GLfloat u0 = (GLfloat)xoffset / cachedFont->getTextureWidth();
-                GLfloat u1 = u0 + (GLfloat)g->bitmap.width / cachedFont->getTextureWidth();
-
-                GLfloat v0 = 0.0f;
-                GLfloat v1 = (GLfloat)g->bitmap.rows / cachedFont->getTextureHeight();
-
-                std::array<GLfloat, 12> texcoords = {
-                    u0, v0,
-                    u0, v1,
-                    u1, v1,
-                    u0, v0,
-                    u1, v1,
-                    u1, v0
-                };
-
-                cachedFont->appendGlyph(new CachedGlyph((char)charcode, texcoords, g->bitmap_left, g->bitmap_top, g->bitmap.width, g->bitmap.rows, (g->advance.x >> 6), (g->advance.y >> 6)));
-
-                xoffset += g->bitmap.width;
-                charcode = FT_Get_Next_Char(font.face, charcode, &gindex);
-            }
-        }
+        if (!cachedFont)
+            cachedFont = CacheFont(font, size);
 
         glColor4ubv(color.ptr());
-
         //Texture parameters are restored when the texture_handle is bound
         glBindTexture(GL_TEXTURE_2D, *cachedFont->getTexture());
 
@@ -129,7 +124,8 @@ namespace JGL {
             x += glyph->advanceX * scale;
             y += glyph->advanceY * scale;
 
-            std::array<GLfloat, 12> glyph_vertices = {
+            std::array<GLfloat, 12> glyph_vertices
+            {
                 x2,     y2,
                 x2,     y2 + h,
                 x2 + w, y2 + h,
@@ -137,34 +133,38 @@ namespace JGL {
                 x2 + w, y2 + h,
                 x2 + w, y2
             };
+
             auto glyph_texcoords = glyph->getTexCoords();
             vertices[i] = glyph_vertices;
             texcoords[i] = glyph_texcoords;
         }
-
-        glVertexPointer(2, GL_FLOAT, sizeof(GLfloat) * 2, vertices.data());
-        glTexCoordPointer(2, GL_FLOAT, sizeof(GLfloat) * 2, texcoords.data());
+        glVertexPointer(2, GL_FLOAT, sizeof(Vector2), vertices.data());
+        glTexCoordPointer(2, GL_FLOAT, sizeof(Vector2), texcoords.data());
         glDrawArrays(GL_TRIANGLES, 0, (int) vertices.size() * 6);
         glBindTexture(GL_TEXTURE_2D, 0);
         glColor4f(1, 1, 1, 1);
     }
 
     void J3D::DrawString(const Color4& color, const std::string& text, const Vector3& pos, float scale, u32 size, const Font& font, const EulerAngle& angle, bool draw_back_face) {
-        //TODO figure out what the scale should actually be mathematically.
+        // TODO: Determine the proper scale factor mathematically
         scale = scale * 0.002f;
         scale = -scale;
-
         float x = pos.x;
         float y = pos.y;
         float z = pos.z;
-        std::vector<GLuint> textures(text.length());
-        glUseProgram(0); // Fixed-function pipeline.
-        glColor4ubv(color.ptr());
 
+        CachedFont* cachedFont = fontCache.getFont(size, font.index);
         if (font.face == nullptr)
-            throw std::runtime_error("FreeType font face is null.");
+            jlog::Fatal("Drawing a string with an uninitialized font?");
 
-        FT_Set_Pixel_Sizes(font.face, 0, size);
+        if (!cachedFont)
+            cachedFont = CacheFont(font, size);
+
+        glColor4ubv(color.ptr());
+        glBindTexture(GL_TEXTURE_2D, *cachedFont->getTexture());
+
+        std::vector<std::array<GLfloat, 18>> vertices(text.size());
+        std::vector<std::array<GLfloat, 12>> texcoords(text.size());
 
         glPushMatrix();
         glTranslatef(x, y, z);
@@ -173,66 +173,43 @@ namespace JGL {
         glRotatef(angle.roll, 0.0f, 0.0f, 1.0f);
 
         x = y = z = 0;
+        for (int i = 0; i < text.length(); i++) {
+            CachedGlyph* glyph = cachedFont->getGlyph(text[i]);
 
-        for (int i = 0; i < text.length(); i++)
-        {
-            if (FT_Load_Char(font.face, text.c_str()[i], FT_LOAD_RENDER))
-                continue;
+            float x2 = x + glyph->x2offset * scale;
+            float y2 = y - glyph->y2offset * scale;
+            float w = glyph->w * scale;
+            float h = glyph->h * scale;
 
-            FT_GlyphSlot g = font.face->glyph;
-            glGenTextures(1, &textures.at(i));
-            glBindTexture(GL_TEXTURE_2D, textures[i]);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
-            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
-            glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, g->bitmap.width, g->bitmap.rows, 0, GL_ALPHA, GL_UNSIGNED_BYTE, g->bitmap.buffer);
+            std::array<GLfloat, 18> glyph_vertices
+            {
+                x2,     y2,     z,
+                x2,     y2 + h, z,
+                x2 + w, y2 + h, z,
+                x2,     y2,     z,
+                x2 + w, y2 + h, z,
+                x2 + w, y2,     z
+            };
 
-            float x2 = x + g->bitmap_left * scale;
-            float y2 = y - g->bitmap_top * scale; // Adjust y-coordinate
-            float z2 = z;
-            float w = g->bitmap.width * scale;
-            float h = g->bitmap.rows * scale;
-
-            if (!draw_back_face)
-                glEnable(GL_CULL_FACE),
-                glCullFace(GL_BACK);
-
-            glBegin(GL_TRIANGLES);
-
-            glTexCoord2f(0, 0);
-            glVertex3f(x2, y2, z2);
-
-            glTexCoord2f(0, 1);
-            glVertex3f(x2, y2 + h, z2);
-
-            glTexCoord2f(1, 1);
-            glVertex3f(x2 + w, y2 + h, z2);
-
-            glTexCoord2f(0, 0);
-            glVertex3f(x2, y2, z2);
-
-            glTexCoord2f(1, 1);
-            glVertex3f(x2 + w, y2 + h, z2);
-
-            glTexCoord2f(1, 0);
-            glVertex3f(x2 + w, y2, z2);
-
-            glEnd();
-
-            if (!draw_back_face)
-                glDisable(GL_CULL_FACE);
-
-            x += (g->advance.x >> 6) * scale;
-            y += (g->advance.y >> 6) * scale;
+            vertices[i] = glyph_vertices;
+            texcoords[i] = glyph->getTexCoords();
+            x += glyph->advanceX * scale;
+            y += glyph->advanceY * scale;
         }
 
-        for (unsigned int& texture : textures)
-            glDeleteTextures(1, &texture);
+        glVertexPointer(3, GL_FLOAT, sizeof(Vector3), vertices.data());
+        glTexCoordPointer(2, GL_FLOAT, sizeof(Vector2), texcoords.data());
 
-        glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture_handle
+        if (!draw_back_face)
+            glEnable(GL_CULL_FACE);
+            glCullFace(GL_BACK);
+
+        glDrawArrays(GL_TRIANGLES, 0, (int) vertices.size() * 6);
+
+        if (!draw_back_face)
+            glDisable(GL_CULL_FACE);
+
+        glBindTexture(GL_TEXTURE_2D, 0);
         glColor4f(1, 1, 1, 1);
         glPopMatrix();
     }

src/logger/logger.cpp

@@ -0,0 +1,9 @@
+#include <JGL/logger/logger.h>
+
+namespace JGL::Logger {
+    using namespace jlog;
+
+    GenericLogger Fatal {"JGL::fatal", GlobalLogFile, Colors::Reds::Crimson, Colors::Gray, Colors::Gray, Colors::Reds::Crimson, Colors::White};
+    GenericLogger Debug {"JGL::debug", GlobalLogFile, Colors::Purples::Purple, Colors::Gray, Colors::Gray, Colors::Purples::Purple, Colors::White};
+    GenericLogger Error {"JGL::error", GlobalLogFile, Colors::Red, Colors::Gray, Colors::Gray, Colors::Red, Colors::White};
+}

src/types/Font.cpp

@@ -3,6 +3,7 @@
 #include <string>
 #include <iostream>
 #include <glad/glad.h>
+#include <jlog/Logger.hpp>
 
 #if __linux__
     #include <freetype2/ft2build.h>
@@ -122,6 +123,7 @@ namespace JGL
             return extents;
         }
 
+        jlog::Warning("Measuring a font size that is not cached, This is *super* slow.");
         FT_Set_Pixel_Sizes(this->face, ptSize, ptSize);
 
         for (const char& c : text) {

src/types/FontCache.cpp

@@ -6,7 +6,7 @@ char CachedGlyph::getCharacter() {
     return character;
 }
 
-const std::array<GLfloat, 12> CachedGlyph::getTexCoords() const {
+std::array<GLfloat, 12> CachedGlyph::getTexCoords() const {
     return texcoords;
 }
 
@@ -21,9 +21,6 @@ CachedGlyph::CachedGlyph(char c, std::array<GLfloat, 12> texcoords, float x2offs
     this->texcoords = texcoords;
 }
 
-//TODO
-//Because most things shown would be english characters. We can cut down on the iteration time significantly
-//by putting each english character at the beginning of the list in order of how often they usually occur in text.
 void JGL::CachedFont::appendGlyph(JGL::CachedGlyph* glyph) {
     glyphs.emplace(glyph->getCharacter(), glyph);
 }
@@ -36,7 +33,6 @@ unsigned int JGL::CachedFont::getFontIndex() {
     return font_index;
 }
 
-//TODO make this code go faster.
 CachedGlyph* JGL::CachedFont::getGlyph(char c) {
     auto it = glyphs.find(c);
     if (it != glyphs.end())
@@ -52,7 +48,7 @@ CachedFont::CachedFont(GLuint texture_id, GLsizei texture_width, GLsizei texture
     this->font_index = font_index;
 }
 
-std::map<char, CachedGlyph*> CachedFont::getGlyphs() {
+std::unordered_map<char, CachedGlyph*> CachedFont::getGlyphs() {
     return glyphs;
 }
 

src/types/RenderTarget.cpp

@@ -0,0 +1,93 @@
+#include <JGL/types/RenderTarget.h>
+#include <jlog/Logger.hpp>
+#include <stdexcept>
+
+JGL::Texture* JGL::RenderTarget::GetJGLTexture() const {
+    return texture;
+}
+
+GLuint JGL::RenderTarget::GetGLTextureHandle() const {
+    return texture->GetGLTextureHandle();
+}
+
+GLuint JGL::RenderTarget::GetGLFramebufferObjectHandle() const {
+    return framebuffer_object;
+}
+
+GLuint JGL::RenderTarget::GetGLDepthBufferHandle() const {
+    return depth_buffer;
+}
+
+GLuint JGL::RenderTarget::GetActiveGLFramebufferHandle() {
+    GLuint fbo;
+    glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &fbo);
+    return fbo;
+}
+
+void JGL::RenderTarget::SetActiveGLRenderTarget(const RenderTarget& render_target) {
+    RenderTarget rt = render_target;
+    glBindFramebuffer(GL_FRAMEBUFFER, rt.GetGLFramebufferObjectHandle());
+    glViewport(0,0, rt.GetDimensions().x, rt.GetDimensions().y);
+}
+
+Vector2 JGL::RenderTarget::GetDimensions() const {
+    return size;
+}
+
+void JGL::RenderTarget::Erase() {
+    if (GetActiveGLFramebufferHandle() == framebuffer_object)
+        jlog::Warning("Deleting the framebuffer that's currently in use?");
+
+    texture->Erase();
+
+    if (using_depth)
+        glDeleteRenderbuffers(1, &depth_buffer);
+
+    glDeleteFramebuffers(1, &framebuffer_object);
+}
+
+Color4 JGL::RenderTarget::GetClearColor() const {
+    return clear_color;
+}
+
+JGL::RenderTarget::RenderTarget(const Vector2& size, const Color4& clear_color, bool use_depth) {
+    GLuint current_fbo = GetActiveGLFramebufferHandle();
+    GLint viewport[4] = {0, 0, 0, 0};
+    glGetIntegerv(GL_VIEWPORT, viewport);
+
+    unsigned int biggest;
+    if (size.x >= size.y)
+        biggest = size.x;
+    else biggest = size.y;
+
+    texture = new Texture(Vector2(biggest, biggest));
+    glGenFramebuffers(1, &framebuffer_object);
+    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_object);
+    glViewport(0,0, size.x, size.y);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->GetGLTextureHandle(), 0);
+
+    if (use_depth) {
+        GLuint depthBuffer;
+        glGenRenderbuffers(1, &depthBuffer);
+        glBindRenderbuffer(GL_RENDERBUFFER, depthBuffer);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, biggest, biggest);
+        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthBuffer);
+        glClear(GL_DEPTH_BUFFER_BIT);
+        using_depth = true;
+    }
+
+    GLfloat old_clear_color[4];
+    glGetFloatv(GL_COLOR_CLEAR_VALUE, old_clear_color);
+    glClearColor(clear_color.RedChannelNormalized(), clear_color.GreenChannelNormalized(), clear_color.BlueChannelNormalized(), clear_color.AlphaChannelNormalized());
+    glClear(GL_COLOR_BUFFER_BIT);
+    glClearColor(old_clear_color[0], old_clear_color[1], old_clear_color[2], old_clear_color[3]);
+
+    GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    if (status != GL_FRAMEBUFFER_COMPLETE)
+        throw std::runtime_error("Error " + std::to_string(status) + "while generating framebuffer");
+
+    glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
+    glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
+    this->clear_color = clear_color;
+    this->size = size;
+}

src/types/Texture.cpp

@@ -5,29 +5,59 @@ using namespace ReTexture;
 
 namespace JGL
 {
-    Texture::Texture(const std::string &file, const ReTexture::TextureFlag &flags, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode)
+    Texture::Texture(const std::string& file, const ReTexture::TextureFlag& flags, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode)
     {
         auto *t = new ReTexture::SoftwareTexture(file, flags);
 
+        GLuint previous_texture;
+        glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
 
-        load(t, {(float) t->getWidth(), (float) t->getHeight()}, t->getTextureFormat(), filtering_mode,
-             wrapping_mode);
+        load(t, {(float) t->getWidth(), (float) t->getHeight()}, t->getTextureFormat(), filtering_mode, wrapping_mode);
         texture_flags = flags;
 
         delete t;
+
+        glBindTexture(GL_TEXTURE_2D, previous_texture);
     }
 
-    Texture::Texture(const std::string &file, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode) {
-        auto *t = new SoftwareTexture(file);
+    Texture::Texture(const std::string& file, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode) {
+        GLuint previous_texture;
+        glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
 
-        load(t, {(float) t->getWidth(), (float) t->getHeight()}, t->getTextureFormat(), filtering_mode,
-             wrapping_mode);
+        auto* t = new SoftwareTexture(file);
+
+        load(t, {(float) t->getWidth(), (float) t->getHeight()}, t->getTextureFormat(), filtering_mode, wrapping_mode);
         texture_flags = TextureFlag::NONE;
 
         delete t;
+        glBindTexture(GL_TEXTURE_2D, previous_texture);
     }
 
-    void Texture::load(SoftwareTexture *software_texture, const Vector2 &size, const TextureFormat &format,
+    Texture::Texture(const Vector2& size) {
+        GLuint previous_texture;
+        glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
+
+        glGenTextures(1, &texture_handle);
+        glBindTexture(GL_TEXTURE_2D, texture_handle);
+        //NEAREST
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        //Clamp
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (int) size.x, (int) size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+
+        texture_format = TextureFormat::RGBA;
+        texture_size = size;
+        texture_filtering_mode = TextureFilteringMode::NEAREST;
+        texture_wrapping_mode = TextureWrappingMode::CLAMP_TO_EDGE;
+        texture_flags = TextureFlag::NONE;
+
+        glBindTexture(GL_TEXTURE_2D, previous_texture);
+    }
+
+    void Texture::load(SoftwareTexture* software_texture, const Vector2& size, const TextureFormat& format,
                            TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode) {
             glGenTextures(1, &texture_handle);
             glBindTexture(GL_TEXTURE_2D, texture_handle);
@@ -92,22 +122,20 @@ namespace JGL
 
                 if (filtering_mode == TextureFilteringMode::MIPMAP_NEAREST)
                     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST),
-                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 
                 else if (filtering_mode == TextureFilteringMode::MIPMAP_BILINEAR)
                     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST),
-                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
                 else if (filtering_mode == TextureFilteringMode::MIPMAP_TRILINEAR)
                     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR),
-                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
                 delete m1;
                 delete m2;
                 delete m3;
             }
-            glBindTexture(GL_TEXTURE_2D, 0);
-
             texture_size = size;
             texture_format = format;
             texture_filtering_mode = filtering_mode;
@@ -160,4 +188,8 @@ namespace JGL
     void Texture::SetTextureHandle(GLuint handle) {
         texture_handle = handle;
     }
+
+    TextureWrappingMode Texture::GetWrappingMode() const {
+        return texture_wrapping_mode;
+    }
 }

src/types/VRamList.cpp

@@ -0,0 +1,85 @@
+#include <JGL/types/VRamList.h>
+#include <jlog/Logger.hpp>
+#include <cstring>
+
+void JGL::VRamList::load(const GLfloat* data, const long& s) {
+    GLint current_array_buffer = 0;
+    glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_array_buffer);
+    glGenBuffers(1, &list_handle);
+    glBindBuffer(GL_ARRAY_BUFFER, list_handle);
+    glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
+    glBindBuffer(GL_ARRAY_BUFFER, current_array_buffer);
+    size = s;
+}
+
+void JGL::VRamList::load(const GLuint* data, const long& s) {
+    GLint current_element_array_buffer = 0;
+    glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_element_array_buffer);
+    glGenBuffers(1, &list_handle);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, list_handle);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, current_element_array_buffer);
+    element_array_buffer = true;
+    size = s;
+}
+
+JGL::VRamList::VRamList(const GLfloat* data, const long& size) {
+    long data_size = (long) sizeof(GLfloat) * size;
+    load(data, data_size);
+}
+
+JGL::VRamList::VRamList(const GLuint* data, const long& size) {
+    load(data, (long) sizeof(GLuint) * size);
+}
+
+JGL::VRamList::VRamList(Vector2* data, const long& size) {
+    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector2) * size);
+}
+
+JGL::VRamList::VRamList(Vector3* data, const long& size) {
+    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector3) * size);
+}
+
+JGL::VRamList::VRamList(Vector4* data, const long& size) {
+    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector4) * size);
+}
+
+void JGL::VRamList::Erase() {
+    if (list_handle == 0)
+        jlog::Warning("Erasing an uninitialized array buffer?");
+
+    GLint current_element_array_buffer = 0;
+    glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_element_array_buffer);
+    GLint current_array_buffer = 0;
+    glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_array_buffer);
+
+    if (element_array_buffer && current_element_array_buffer == list_handle)
+        jlog::Warning("Erasing an element array buffer while it's in use?");
+
+    else if (!element_array_buffer && current_array_buffer == list_handle)
+        jlog::Warning("Erasing an array buffer while it's in use?");
+
+    glDeleteBuffers(1, &list_handle);
+}
+
+GLuint JGL::VRamList::GetHandle() const {
+    return list_handle;
+}
+
+bool JGL::VRamList::IsIntegerArray() const {
+    return element_array_buffer;
+}
+
+bool JGL::VRamList::IsFloatArray() const {
+    return !element_array_buffer;
+}
+
+long JGL::VRamList::GetSize() const {
+    return size;
+}
+
+long JGL::VRamList::GetDataSize() const {
+    if (element_array_buffer)
+        return (long) sizeof(GLuint) * size;
+    return (long) sizeof(GLfloat) * size;
+}