Fixed a case where resizing the render target was no good

Dramatically improve the speed of J2D::DrawCubicBezierCurve

.gitea/workflows/buildtest.yml

@@ -17,6 +17,6 @@ jobs:
       - run: echo "The ${{ gitea.repository }} repository has been cloned to the runner."
       - run: echo "The workflow is now ready to run your tests on the runner."
       - run: echo "Install toolchain and run ReCI build test"
-      - run: apt-get update && apt-get install -y lua5.3 git libxrandr-dev && git clone $RECI_GIT $RECI
+      - run: apt-get update && apt-get install -y lua5.3 git libxrandr-dev libvulkan-dev && git clone $RECI_GIT $RECI
       - run: lua $RECI/reci.lua -f $RECI/scripts/buildtools.reci -f reci/scripts/builddeps.reci -f $RECI/scripts/buildtest.reci
       - run: echo "This job's status is ${{ job.status }}."

CMakeLists.txt

@@ -17,22 +17,22 @@ include(cmake/CPM.cmake)
 
 CPMAddPackage(
         NAME mcolor
-        URL https://git.redacted.cc/maxine/mcolor/archive/Prerelease-4.zip
+        URL https://git.redacted.cc/maxine/mcolor/archive/Prerelease-5.zip
 )
 
 CPMAddPackage(
         NAME J3ML
-        URL https://git.redacted.cc/josh/j3ml/archive/Release-3.4.zip
+        URL https://git.redacted.cc/josh/j3ml/archive/3.4.5.zip
 )
 
 CPMAddPackage(
         NAME ReWindow
-        URL https://git.redacted.cc/Redacted/ReWindow/archive/Prerelease-21.zip
+        URL https://git.redacted.cc/Redacted/ReWindow/archive/Prerelease-32.zip
 )
 
 CPMAddPackage(
         NAME GLAD
-        URL https://git.redacted.cc/Redacted/glad/archive/v2.1ext_fboV2.zip
+        URL https://git.redacted.cc/Redacted/glad/archive/v2.1ext_fbo_depthtexture_shadow.zip
 )
 
 CPMAddPackage(
@@ -40,17 +40,7 @@ CPMAddPackage(
         URL https://git.redacted.cc/josh/jlog/Prerelease-16.zip
 )
 
-CPMAddPackage(
-        NAME ReImage
-        URL https://git.redacted.cc/Redacted/ReImage/archive/Release-2.0.zip
-)
-
 if (WIN32)
-    #CPMAddPackage(
-            #NAME harfbuzz
-            #URL https://github.com/harfbuzz/harfbuzz/archive/refs/tags/9.0.0.zip
-    #)
-
     CPMAddPackage(
             NAME freetype
             URL https://github.com/freetype/freetype/archive/refs/tags/VER-2-13-2.zip
@@ -61,10 +51,8 @@ endif()
 
 file(COPY "assets" DESTINATION "${PROJECT_BINARY_DIR}")
 file(GLOB_RECURSE ASSETS  "assets/*")
-file(GLOB_RECURSE HEADERS "include/*.h" "include/*.hpp")
-file(GLOB_RECURSE SOURCES "src/*.c"     "src/*.cpp"    )
-
-find_package(OpenGL REQUIRED)
+file(GLOB_RECURSE HEADERS "include/*.h" "include/*.hpp"            )
+file(GLOB_RECURSE SOURCES "src/*.c" "src/*.cpp" "src/*.h")
 
 if (UNIX AND NOT APPLE)
     find_package(Freetype REQUIRED)
@@ -85,8 +73,6 @@ include_directories(
 
 target_include_directories(JGL PUBLIC
         ${PROJECT_SOURCE_DIR}/include
-        ${OPENGL_INCLUDE_DIRS}
-        ${ReImage_SOURCE_DIR}/include
         ${mcolor_SOURCE_DIR}/include
         ${J3ML_SOURCE_DIR}/include
         ${jlog_SOURCE_DIR}/include
@@ -99,13 +85,13 @@ 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 jlog ReImage glad)
+    target_link_libraries(JGL PUBLIC mcolor J3ML jlog glad)
 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 glad jlog ReImage glad)
+    target_link_libraries(JGL PUBLIC ${OPENGL_LIBRARIES} mcolor J3ML glad jlog glad)
 endif()
 
-target_link_libraries(JGL_Demo PUBLIC JGL ReWindowLibrary Event glad)
+target_link_libraries(JGL_Demo PUBLIC JGL ReWindow Event glad)

README.md

@@ -19,12 +19,17 @@ Yet Another C++ Rendering Toolkit
 
 ### J2D
 * DrawPoint
-* DrawLine / DrawGradientLine
+* DrawLine / DrawGradientLine / DrawDottedLine / DrawDashedLine / DrawLines
 * DrawSprite / DrawPartialSprite
-* OutlineRect / FillRect / FillGradientRect / FillRoundedRect
+* DrawRenderTarget / DrawPartialRenderTarget
+* OutlineRect / OutlineRoundedRect / OutlineChamferRect 
+* FillRect / FillGradientRect / FillRoundedRect / FillChamferRect
 * OutlineCircle / FillCircle
-* OutlineTriangle / FillTriangle
+* OutlineTriangle / FillTriangle / FillGradientTriangle
 * DrawString
+* DrawCubicBezierCurve
+* DrawArc
+* OutlineEllipse / FillEllipse
 
 ### J3D
 * DrawLine
@@ -53,7 +58,7 @@ JGL::J2D::End();
 ```
 ## Requirements
 
-An OpenGL 2.1 or newer accelerator that supports the `GL_ARB_framebuffer_object` extension or
+An OpenGL 2.1 or newer accelerator with at-least two texture mappers that supports the `GL_ARB_framebuffer_object` extension or
 an implementation that can provide those features through alternative means (common on ArmSoC and Risc-V).
 
 ## Compatability

assets/models/cone.obj

@@ -0,0 +1,164 @@
+# Blender v3.6.4 OBJ File: ''
+# www.blender.org
+o Cone
+v 0.000000 -1.000000 -1.000000
+v 0.195090 -1.000000 -0.980785
+v 0.382683 -1.000000 -0.923880
+v 0.555570 -1.000000 -0.831470
+v 0.707107 -1.000000 -0.707107
+v 0.831470 -1.000000 -0.555570
+v 0.923880 -1.000000 -0.382683
+v 0.980785 -1.000000 -0.195090
+v 1.000000 -1.000000 0.000000
+v 0.980785 -1.000000 0.195090
+v 0.923880 -1.000000 0.382683
+v 0.831470 -1.000000 0.555570
+v 0.707107 -1.000000 0.707107
+v 0.555570 -1.000000 0.831470
+v 0.382683 -1.000000 0.923880
+v 0.195090 -1.000000 0.980785
+v 0.000000 -1.000000 1.000000
+v -0.195090 -1.000000 0.980785
+v -0.382683 -1.000000 0.923880
+v -0.555570 -1.000000 0.831470
+v -0.707107 -1.000000 0.707107
+v -0.831470 -1.000000 0.555570
+v -0.923880 -1.000000 0.382683
+v -0.980785 -1.000000 0.195090
+v -1.000000 -1.000000 0.000000
+v -0.980785 -1.000000 -0.195090
+v -0.923880 -1.000000 -0.382683
+v -0.831470 -1.000000 -0.555570
+v -0.707107 -1.000000 -0.707107
+v -0.555570 -1.000000 -0.831470
+v -0.382683 -1.000000 -0.923880
+v -0.195090 -1.000000 -0.980785
+v 0.000000 1.000000 0.000000
+vt 0.250000 0.490000
+vt 0.250000 0.250000
+vt 0.296822 0.485388
+vt 0.341844 0.471731
+vt 0.383337 0.449553
+vt 0.419706 0.419706
+vt 0.449553 0.383337
+vt 0.471731 0.341844
+vt 0.485388 0.296822
+vt 0.490000 0.250000
+vt 0.485388 0.203178
+vt 0.471731 0.158156
+vt 0.449553 0.116663
+vt 0.419706 0.080294
+vt 0.383337 0.050447
+vt 0.341844 0.028269
+vt 0.296822 0.014612
+vt 0.250000 0.010000
+vt 0.203178 0.014612
+vt 0.158156 0.028269
+vt 0.116663 0.050447
+vt 0.080294 0.080294
+vt 0.050447 0.116663
+vt 0.028269 0.158156
+vt 0.014612 0.203178
+vt 0.010000 0.250000
+vt 0.014612 0.296822
+vt 0.028269 0.341844
+vt 0.050447 0.383337
+vt 0.080294 0.419706
+vt 0.116663 0.449553
+vt 0.158156 0.471731
+vt 0.796822 0.014612
+vt 0.514612 0.203178
+vt 0.703178 0.485388
+vt 0.203178 0.485388
+vt 0.750000 0.490000
+vt 0.796822 0.485388
+vt 0.841844 0.471731
+vt 0.883337 0.449553
+vt 0.919706 0.419706
+vt 0.949553 0.383337
+vt 0.971731 0.341844
+vt 0.985388 0.296822
+vt 0.990000 0.250000
+vt 0.985388 0.203178
+vt 0.971731 0.158156
+vt 0.949553 0.116663
+vt 0.919706 0.080294
+vt 0.883337 0.050447
+vt 0.841844 0.028269
+vt 0.750000 0.010000
+vt 0.703178 0.014612
+vt 0.658156 0.028269
+vt 0.616663 0.050447
+vt 0.580294 0.080294
+vt 0.550447 0.116663
+vt 0.528269 0.158156
+vt 0.510000 0.250000
+vt 0.514612 0.296822
+vt 0.528269 0.341844
+vt 0.550447 0.383337
+vt 0.580294 0.419706
+vt 0.616663 0.449553
+vt 0.658156 0.471731
+s off
+f 1/1 33/2 2/3
+f 2/3 33/2 3/4
+f 3/4 33/2 4/5
+f 4/5 33/2 5/6
+f 5/6 33/2 6/7
+f 6/7 33/2 7/8
+f 7/8 33/2 8/9
+f 8/9 33/2 9/10
+f 9/10 33/2 10/11
+f 10/11 33/2 11/12
+f 11/12 33/2 12/13
+f 12/13 33/2 13/14
+f 13/14 33/2 14/15
+f 14/15 33/2 15/16
+f 15/16 33/2 16/17
+f 16/17 33/2 17/18
+f 17/18 33/2 18/19
+f 18/19 33/2 19/20
+f 19/20 33/2 20/21
+f 20/21 33/2 21/22
+f 21/22 33/2 22/23
+f 22/23 33/2 23/24
+f 23/24 33/2 24/25
+f 24/25 33/2 25/26
+f 25/26 33/2 26/27
+f 26/27 33/2 27/28
+f 27/28 33/2 28/29
+f 28/29 33/2 29/30
+f 29/30 33/2 30/31
+f 30/31 33/2 31/32
+f 16/33 24/34 32/35
+f 31/32 33/2 32/36
+f 32/36 33/2 1/1
+f 32/35 1/37 2/38
+f 2/38 3/39 4/40
+f 4/40 5/41 6/42
+f 6/42 7/43 8/44
+f 8/44 9/45 10/46
+f 10/46 11/47 12/48
+f 12/48 13/49 14/50
+f 14/50 15/51 16/33
+f 16/33 17/52 18/53
+f 18/53 19/54 20/55
+f 20/55 21/56 22/57
+f 22/57 23/58 24/34
+f 24/34 25/59 26/60
+f 26/60 27/61 28/62
+f 28/62 29/63 30/64
+f 30/64 31/65 32/35
+f 32/35 2/38 8/44
+f 2/38 4/40 8/44
+f 4/40 6/42 8/44
+f 8/44 10/46 16/33
+f 10/46 12/48 16/33
+f 12/48 14/50 16/33
+f 16/33 18/53 24/34
+f 18/53 20/55 24/34
+f 20/55 22/57 24/34
+f 24/34 26/60 32/35
+f 26/60 28/62 32/35
+f 28/62 30/64 32/35
+f 32/35 8/44 16/33

assets/models/cube.amo

@@ -0,0 +1,46 @@
+ao Cube 1
+v 8
+1.000000 1.000000 1.000000
+1.000000 1.000000 -1.000000
+1.000000 -1.000000 1.000000
+1.000000 -1.000000 -1.000000
+-1.000000 1.000000 1.000000
+-1.000000 1.000000 -1.000000
+-1.000000 -1.000000 1.000000
+-1.000000 -1.000000 -1.000000
+vt 14
+0.625000 0.500000
+0.875000 0.500000
+0.875000 0.750000
+0.625000 0.750000
+0.375000 0.750000
+0.625000 1.000000
+0.375000 1.000000
+0.375000 0.000000
+0.625000 0.000000
+0.625000 0.250000
+0.375000 0.250000
+0.125000 0.500000
+0.375000 0.500000
+0.125000 0.750000
+vn 6
+0.000000 0.000000 1.000000
+0.000000 -1.000000 0.000000
+-1.000000 0.000000 0.000000
+0.000000 0.000000 -1.000000
+1.000000 0.000000 0.000000
+0.000000 1.000000 0.000000
+f 12
+2 0 0 0 1 0 4 2 0 
+7 3 1 3 4 1 2 3 1 
+5 5 2 7 6 2 6 7 2 
+7 8 3 5 9 3 1 10 3 
+3 11 4 1 12 4 0 4 4 
+1 13 5 5 12 5 4 0 5 
+2 0 0 4 1 0 6 2 0 
+7 3 1 2 4 1 6 3 1 
+5 5 2 6 6 2 4 7 2 
+7 8 3 1 9 3 3 10 3 
+3 11 4 0 12 4 2 4 4 
+1 13 5 4 12 5 0 0 5 
+end

assets/models/cube.obj

@@ -0,0 +1,38 @@
+# Blender v3.6.4 OBJ File: ''
+# www.blender.org
+o Cube
+v 1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 1.000000
+v -1.000000 1.000000 -1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 1.000000
+vt 0.875000 0.500000
+vt 0.625000 0.750000
+vt 0.625000 0.500000
+vt 0.375000 1.000000
+vt 0.375000 0.750000
+vt 0.625000 0.000000
+vt 0.375000 0.250000
+vt 0.375000 0.000000
+vt 0.375000 0.500000
+vt 0.125000 0.750000
+vt 0.125000 0.500000
+vt 0.625000 0.250000
+vt 0.875000 0.750000
+vt 0.625000 1.000000
+s off
+f 5/1 3/2 1/3
+f 3/2 8/4 4/5
+f 7/6 6/7 8/8
+f 2/9 8/10 6/11
+f 1/3 4/5 2/9
+f 5/12 2/9 6/7
+f 5/1 7/13 3/2
+f 3/2 7/14 8/4
+f 7/6 5/12 6/7
+f 2/9 4/5 8/10
+f 1/3 3/2 4/5
+f 5/12 1/3 2/9

include/JGL/types/Font.h

@@ -13,8 +13,6 @@ extern "C" typedef struct FT_LibraryRec_* FT_Library;
 
 namespace JGL
 {
-
-    //bool Init();
     bool InitTextEngine();
 
     /// A Font class implementation.
@@ -23,7 +21,8 @@ namespace JGL
     public:
         /// Default constructor does not initialize any members
         Font() = default;
-        Font(const std::filesystem::path& path);
+        explicit Font(const std::filesystem::path& path);
+        Font(const unsigned char* data, const size_t& size);
         /// Destructor handles freeing of the underlying asset handle.
         ~Font();
         static Font LoadTTF(const std::filesystem::path& filepath);
@@ -35,6 +34,6 @@ namespace JGL
         Vector2 MeasureString(const std::string& text, unsigned int ptSize);
     public:
         int index = 0;
-        FT_Face face;
+        FT_Face face = nullptr;
     };
 }

include/JGL/types/Light.h

@@ -1,30 +1,70 @@
 #pragma once
 #include <J3ML/LinearAlgebra/Vector4.hpp>
 #include <J3ML/LinearAlgebra/Vector3.hpp>
+#include <J3ML/LinearAlgebra/DirectionVector.hpp>
+#include <J3ML/Geometry/Frustum.hpp>
 #include <Color4.hpp>
 
 namespace JGL {
-    class Light;
-    class OmnidirectionalLight2D;
-    class PointLight2D;
+    class LightBase;
+    class PointLight;
+    class SpotLight;
 }
 
-class JGL::Light {
-private:
-    /// W in position seems to determine whether or not the light is omni-directional. 1 = omni 0 = point.
-    /// Position is un-normalized screen space. For ex 500, 500, 1 for a light coming from where you're sitting.
+// TODO this can be consolidated.
+class JGL::LightBase {
+protected:
+    /* The 4th number represents whether the light is a positional light.
+     * In OpenGL, You can have positional lights, Like Point Lights or Spot Lights,
+     * Or global lights, Like the sun. */
     Vector4 position = {0, 0, 0, 1};
     Color4 ambient = {0, 0, 0, 0};
     Color4 diffuse = {0, 0, 0, 0};
     Color4 specular = {0, 0, 0, 0};
+
+    float constant_attenuation = 1;
+    float linear_attenuation = 0;
+    float quadratic_attenuation = 0;
 public:
-    Light(const Vector3& position, const Color4& ambient, const Color4& diffuse, const Color4& specular);
-    Vector3 GetNormalizedSceenSpaceCoordinates() const;
+    [[nodiscard]] Vector4 GetPosition() const;
+    [[nodiscard]] Color4 GetAmbient() const;
+    [[nodiscard]] Color4 GetDiffuse() const;
+    [[nodiscard]] Color4 GetSpecular() const;
+
+    [[nodiscard]] float GetConstantAttenuation() const;
+    [[nodiscard]] float GetLinearAttenuation() const;
+    [[nodiscard]] float GetQuadraticAttenuation() const;
+public:
+    /// Runs a calculation to determine the lights influence on a given point in 3D space.
+    /// @note 0 would be no impact, 1 would be the light is at the same position.
+    [[nodiscard]] virtual float GetAttenuationAtPosition(const Vector3& pos) const { return 0; }
+public:
+    virtual ~LightBase() = default;
 };
 
-class JGL::OmnidirectionalLight2D {
-private:
+/// Omni-directional lights.
+class JGL::PointLight : public LightBase {
 public:
-    OmnidirectionalLight2D(const Vector3& position, const Color4& ambient, const Color4& diffuse, const Color4& specular);
-
+    [[nodiscard]] float GetAttenuationAtPosition(const Vector3& pos) const final;
+public:
+    PointLight(const Vector3& position, const Color4& ambient, const Color4& diffuse, const Color4& specular, float constant_attenuation = 1, float linear_attenuation = 0, float quadratic_attenuation = 0);
 };
+
+/// Lights which only effect things in a given cone.
+// TODO get attenuation at position for this.
+class JGL::SpotLight : public LightBase {
+protected:
+    Matrix3x3 orientation;
+    float exponent;
+    float cut;
+public:
+    /// Create a spotlight in 3D space.
+    /// @param position The position of the light in 3D space.
+    /// @param ro_mat Orientation of the light in 3D space.
+    /// @param cone_size_degrees The size of the cone.
+    /// @param exponent How focused the beam should be, Higher is more focused, Lower is less.
+    /// @param ambient How much this light should effect the ambient light of the scene.
+    /// @param diffuse
+    /// @param specular How much this light should effect specular highlights of objects being influenced by it.
+    SpotLight(const Vector3& position, const Matrix3x3& ro_mat, float cone_size_degrees, float exponent, const Color4& ambient, const Color4& diffuse, const Color4& specular, float constant_attenuation = 1, float linear_attenuation = 0, float quadratic_attenuation = 0);
+};

include/JGL/types/Material.h

@@ -1,4 +1,19 @@
 /// A simple wrapper for OpenGL materials. Lets you set things such as the "shininess" of your elements.
-class Material {
 
+#include <Color4.hpp>
+#include <glad/glad.h>
+namespace JGL {
+    class Material;
+}
+class JGL::Material {
+public:
+    Color4 ambient_ref;
+    Color4 diffuse_ref;
+    Color4 specular_ref;
+    Color4 emission;
+    float shininess;
+public:
+    Material(const Color4& ambient_reflection, const Color4& diffuse_reflection, const Color4& specular_reflection, const Color4& light_emission, float& shine);
+    /// @param material Material to use.
+    static void SetActiveMaterial(const Material& material);
 };

include/JGL/types/RenderTarget.h

@@ -1,20 +1,21 @@
 #pragma once
+#include <vector>
 #include <glad/glad.h>
 #include <Color4.hpp>
 #include <Colors.hpp>
 #include <JGL/types/Enums.h>
-#include <J3ML/LinearAlgebra/Vector2.hpp>
+#include <J3ML/LinearAlgebra/Vector2i.hpp>
 
 namespace JGL {
     class RenderTarget;
-    class Texture; // Forward declare.
+    class Texture;
 }
 
+using J3ML::LinearAlgebra::Vector2i;
 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};
+    Vector2i size{0, 0};
     bool using_depth = false;
     bool texture_created_by_us = false;
     GLuint framebuffer_object = 0;
@@ -26,47 +27,98 @@ private:
     GLuint msaa_render_buffer = 0;
     void Erase();
 public:
+    /// @returns The Render Target currently in use by OpenGL.
+    /// @note Zero is the screen.
     static GLuint GetActiveGLFramebufferHandle();
+
+    /// Changes the Render Target that OpenGL will draw on.
+    /// @param render_target The new Render Target for OpenGL to draw on.
     static void SetActiveGLRenderTarget(const RenderTarget& render_target);
 
-    /** Change the size of the renderable area of the Render Target. **/
-    /// @param new_size new size in px.
-    void Resize(const Vector2& new_size);
-    void SetMSAAEnabled(MSAA_SAMPLE_RATE sample_rate);
-    /// If you're using raw OpenGL commands to draw to this outside of J2D or J3D don't forget to do this.
-    /// Blits the MSAA FBO onto the regular FBO if MSAA is enabled and or If you're rendering to a texture which uses mipmaps,
-    /// It regenerates them so what you drew doesn't disappear at a distance. Otherwise it does nothing.
-    void Blit() const;
+    /// Changes the size of the renderable area of this Render Target.
+    /// @param new_size new width & height in pixels.
+    /// @note The data stored in this Render Target will be lost.
+    void Resize(const Vector2i& new_size);
 
-    /// Blit a render target onto another. Will break if they're not the same size.
-    static void Blit(const RenderTarget& source, RenderTarget* destination);
+    /// Sets the MSAA mode for this Render Target.
+    /// @returns false if the mode isn't available, true for success.
+    [[nodiscard]] bool SetMSAAEnabled(MSAA_SAMPLE_RATE sample_rate);
 
-    /// Blit a single pixel onto a Render Target.
+    /// If you're using MSAA and not using J2D || J3D Begin & End you must do this.
+    void MSAABlit() const;
+
+    /// Copy one Render Target onto another. Will break if they're not the same size.
+    // TODO support different sizes. If the destination is too small fix it for them but log a warning.
+    static void Blit(const RenderTarget& source, RenderTarget* destination, const Vector2i& position = {0, 0});
+
+    /// Plots a single pixel onto a Render Target.
     /// @param color The color to render.
     /// @param position The position in the destination to draw the pixel.
     /// @param destination The destination RenderTarget.
-    static void Blit(const Color4& color, const Vector2& position, RenderTarget* destination);
-    [[nodiscard]] bool TextureCreatedByRenderTarget() const;
+    static void Blit(const Color4& color, const Vector2i& position, RenderTarget* destination);
+
+    /// Blit an input texture onto this render target at the given position.
+    /// @param source Source texture.
+    /// @param destination Render Target to draw on.
+    /// @param position Where in the destination to draw.
+    static void Blit(const Texture* source, RenderTarget* destination, const Vector2i& position = {0, 0});
+
+    /// @returns Whether or not this Render Target created it's Texture.
+    [[nodiscard]] bool OwnsTexture() const;
 public:
-    [[nodiscard]] Vector2 GetDimensions() const;
+    /// @returns the size of the renderable area.
+    [[nodiscard]] Vector2i GetDimensions() const;
+
+    /// @returns The currently selected MSAA Sample Rate.
     [[nodiscard]] MSAA_SAMPLE_RATE GetMSAASampleRate() const;
-    /// Returns whether or not MSAA is enabled, If it is and you're not using J2D || J3D Begin / End,
-    /// You need to run "Blit()" after rendering to your FBO before you show it.
-    /// @note Also, If the texture wasn't made by the RenderTarget you don't want this. It would destroy the texture.
+
+    /// @returns Whether or not this Render Target is using MSAA.
     [[nodiscard]] bool MSAAEnabled() const;
-    [[nodiscard]] const Texture* GetJGLTexture() const;
-    [[nodiscard]] GLuint GetGLTextureHandle() const;
+
+    /// @returns The JGL texture this Render Target draws on.
+    [[nodiscard]] const Texture* GetTexture() const;
+
+    /// @returns The OpenGL handle for the texture this Render Target draws on.
+    [[nodiscard]] GLuint GetTextureHandle() const;
+
+    /// @returns The OpenGL handle for this Render Target.
     [[nodiscard]] GLuint GetGLFramebufferObjectHandle() const;
+
+    /// @returns The handle to the OpenGL buffer containing depth information
+    /// @note Only valid if this Render Target is being used for 3D.
     [[nodiscard]] GLuint GetGLDepthBufferHandle() const;
+
+    /// @returns The color that should be used to clear this Render Target.
     [[nodiscard]] Color4 GetClearColor() const;
-    /// Get the data back from the FBO. This is *not* async friendly.
-    [[nodiscard]] std::vector<GLfloat> GetData() const;
+
+    /// @returns The color information for this Render Target.
+    /// @note The CPU thread this is called from & the GPU cannot do anything while this takes place. It's very slow.
+    [[nodiscard]] std::vector<GLfloat> GetPixels() const;
+
+    [[nodiscard]] static Vector2i MaximumSize();
 public:
-    /// Copy constructor. Will always set "texture_created_by_us" to true and use our own texture to avoid memleaks.
+    /// Create a Render Target from a Render Target that already exists.
+    /** @note Render Targets that are copies of another will copy the Texture.
+     * This is so that deleting the copy doesn't delete the Texture of the original.
+    */
     RenderTarget(const RenderTarget& rhs);
-    /// Create a render target for a texture that already exists. For adding to an existing texture.
-    explicit RenderTarget(const Texture* texture, const Color4& clear_color = Colors::Black);
-    /// 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, MSAA_SAMPLE_RATE sample_rate = MSAA_SAMPLE_RATE::MSAA_NONE);
+
+    /// Create a Render Target for a texture that already exists.
+    /// @param texture The Texture that using this Render Target would draw on.
+    /// @param clear_color The color to be used if you want to clear the Render Target.
+    /// @note For Render Targets created this way, The destructor will not delete the texture.
+    explicit RenderTarget(const Texture* texture, const Color4& clear_color = Colors::Transparent);
+
+    /// Create a Render Target with a new texture.
+    /// @param size The width & height the Render Target should have.
+    /// @param clear_color The color to be used if you want to clear the Render Target.
+    /// @param use_depth Whether or not this Render Target will have depth information.
+    /// @param sample_rate The MSAA sample rate this Render Target will use.
+    explicit RenderTarget(const Vector2i& size, const Color4& clear_color = Colors::Transparent, bool use_depth = false, MSAA_SAMPLE_RATE sample_rate = MSAA_SAMPLE_RATE::MSAA_NONE);
+
+    /// Deletes this Render Target.
+    /** @note If this Render Target was made with a Texture that already existed
+     * the Texture will not be deleted. */
     ~RenderTarget();
+
 };

include/JGL/types/ShadowMap.h

@@ -0,0 +1,18 @@
+#pragma once
+#include <JGL/types/RenderTarget.h>
+#include <JGL/types/Light.h>
+
+namespace JGL {
+    class ShadowMap;
+}
+
+/// You render your scene with all the static objects from the perspective of each static light to a ShadowMap.
+/// Then, for shadow casters which move. Or lights that move. You only redraw that object from the perspective of each light.
+/// Some of the approaches I saw for this were disgusting - Redacted.
+
+class JGL::ShadowMap {
+private:
+    RenderTarget shadow_map;
+private:
+    void Create(const LightBase* Light);
+};

include/JGL/types/Texture.h

@@ -1,57 +1,78 @@
 #pragma once
-#include <ReImage/Image.h>
-#include <J3ML/LinearAlgebra.hpp>
+#include<vector>
+#include <filesystem>
+#include <J3ML/LinearAlgebra/Vector2i.hpp>
 #include <Color3.hpp>
 #include <Color4.hpp>
-#include <glad/glad.h>
 
 namespace JGL {
-    using namespace ReImage;
-    enum class TextureFilteringMode : u8 {
-        NEAREST = 0, //Fastest for 2D, Sometimes causes graphical issues.
-        BILINEAR = 1, //Fast and pretty, The best for 2D.
+    using J3ML::LinearAlgebra::Vector2i;
 
-        MIPMAP_NEAREST = 2, //Nearest with mipmaps. The fastest for 3D, Sometimes causes graphical issues. Uses more vram.
-        MIPMAP_BILINEAR = 3, //Bilinear with mipmaps, Fast and pretty. Uses more vram.
-        MIPMAP_TRILINEAR = 4 //The prettiest. Still decent speed. Uses more vram.
+    enum class FilteringMode : u8 {
+        NEAREST = 0, // Fastest for 2D, Sometimes causes graphical issues.
+        BILINEAR = 1, // Fast and pretty, The best for 2D.
+
+        MIPMAP_NEAREST = 2, // Nearest with mipmaps. The fastest for 3D, Sometimes causes graphical issues. Uses more vram.
+        MIPMAP_BILINEAR = 3, // Bilinear with mipmaps, Fast and pretty. Uses more vram.
+        MIPMAP_TRILINEAR = 4 // The prettiest. Still decent speed. Uses more vram.
     };
 
-    enum class TextureWrappingMode : u8 {
+    enum class WrappingMode : u8 {
         REPEAT = 0,
         MIRRORED_REPEAT = 1,
         CLAMP_TO_EDGE = 2,
-        CLAMP_TO_BORDER = 3 //Effectively the same as clamp_to_edge
+        CLAMP_TO_BORDER = 3 // Effectively the same as clamp_to_edge
     };
+    enum class ColorFormat : bool { RGB = false, RGBA = true };
+    class Texture;
+}
 
-    /// Represents texture data loaded on the GPU. Contains a handle that can be passed to OpenGL draw calls.
-    class Texture {
-    private:
-        void Erase();
-    protected:
-        GLuint texture_handle = 0;
-        Vector2 texture_size = {0, 0};
-        ReImage::TextureFlag texture_flags;
-        ReImage::TextureFormat texture_format;
-        TextureFilteringMode texture_filtering_mode;
-        TextureWrappingMode texture_wrapping_mode;
-        void load(Image* 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, const TextureFlag& flags = TextureFlag::INVERT_Y);
-        Texture(Image* software_texture, const Vector2& size, const TextureFormat& format, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode);
-        /* Initialize a texture filled with trash data
-        this is primarily for the RenderTarget */
-        explicit Texture(const Vector2& size);
-        Texture(const Texture& rhs);
-        ~Texture();
-    public:
-        [[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;
-    };
+/// Represents texture data loaded on the GPU. Contains a handle that can be passed to OpenGL draw calls.
+class JGL::Texture {
+protected:
+    unsigned int texture_handle = 0;
+    bool invert_y = false;
+    Vector2i size = {0, 0};
+    ColorFormat format =  ColorFormat::RGBA;
+    FilteringMode filtering_mode;
+    WrappingMode wrapping_mode;
+    void load(const unsigned char* pixels);
+    std::vector<unsigned char> png(const std::filesystem::path& file);
+    std::vector<unsigned char> bmp(const std::filesystem::path& file);
+    [[nodiscard]] bool SizeExceedsMaximum(const Vector2i& size);
+public:
+    /// @returns A handle used to identify this texture.
+    [[nodiscard]] unsigned int GetHandle() const;
+    /// @returns The size of this texture.
+    [[nodiscard]] Vector2i GetDimensions() const;
+    /// @returns The filtering mode this texture is using.
+    [[nodiscard]] FilteringMode GetFilteringMode() const;
+    /// @returns The way this texture behaves when used on geometry of different sizes.
+    [[nodiscard]] WrappingMode GetWrappingMode() const;
+    /// @returns The orientation of this texture in v-ram.
+    /// @note true is right-side-up because OpenGL defaults to upside-down.
+    [[nodiscard]] bool Inverted() const;
+    [[nodiscard]] ColorFormat GetFormat() const;
+    /// @returns The raw pixels this texture is made up of.
+    /// @note This will read-back from the GPU. Slow.
+    [[nodiscard]] std::vector<Color4> GetPixelData() const;
+    /// @returns The biggest size for a texture on this system.
+    /// @note on modern systems this is *usually* ridiculous.
+    [[nodiscard]] static Vector2i MaximumSize();
+public:
+    /// Load a texture from a file,
+    explicit Texture(const std::filesystem::path& file, FilteringMode filtering_mode = FilteringMode::BILINEAR, WrappingMode wrapping_mode = WrappingMode::CLAMP_TO_EDGE, bool invert_y = true);
+    /// Load a texture from raw pixels.
+    Texture(const Color4* pixels, const Vector2i& size, const ColorFormat& format, FilteringMode filtering_mode, WrappingMode wrapping_mode);
+    /// Load a texture from raw pixels.
+    Texture(const Color3* pixels, const Vector2i& size, const ColorFormat& format, FilteringMode filtering_mode, WrappingMode wrapping_mode);
+    /// Construct a Texture Atlas from many different textures.
+    /// @note THIS IS UNFINISHED.
+    Texture(const Texture* textures, const size_t& texture_count);
+    /// Initialize a texture filled with trash data.
+    /// @see RenderTarget
+    explicit Texture(const Vector2i& size);
 
-}
+    Texture(const Texture& rhs);
+    ~Texture();
+};

include/JGL/types/VRamList.h

@@ -20,21 +20,21 @@ private:
     bool spin_lock = false;
     void load(const GLfloat* data, const long& size);
     void load(const GLuint* data, const long& size);
-    void SetData(void* data, const long& length);
-    void UpdateData(void* data, const long& offset, const long& length);
+    void SetData(void* data, const long& count);
+    void UpdateData(void* data, const long& offset, const long& count);
     void Erase();
 public:
-    VRamList(const GLuint* data, const long& length);
-    VRamList(const GLfloat* data, const long& length);
-    VRamList(const Vector2* data, const long& length);
-    VRamList(const Vector3* data, const long& length);
-    VRamList(const Vector4* data, const long& length);
+    VRamList(const GLuint* data, const long& count);
+    VRamList(const GLfloat* data, const long& count);
+    VRamList(const Vector2* data, const long& count);
+    VRamList(const Vector3* data, const long& count);
+    VRamList(const Vector4* data, const long& count);
 
     ~VRamList();
     /** Copying around the VBO data to a new VBO like this is slow.
      * Pass to function by const reference or pointer always. */
     VRamList(const VRamList& rhs);
-    VRamList() = default;
+    VRamList() : list_handle(0), num_elements(0), element_array_buffer(false), spin_lock(false) {}
 public:
     [[nodiscard]] GLuint GetHandle() const;
     /// Returns the number of elements in the list.
@@ -46,25 +46,23 @@ public:
     [[nodiscard]] std::vector<GLfloat> GetDataF() const;
     [[nodiscard]] std::vector<GLuint> GetDataUI() const;
     [[nodiscard]] bool IsFloatArray() const;
-    /** Replace the data of an existing VBO in it's entirety. Must be same type.
-      * "length" refers to the number of elements in data. Not the number of bytes. */
-    void SetData(const GLfloat* data, const long& length);
-    void SetData(const Vector2* data, const long& length);
-    void SetData(const Vector3* data, const long& length);
-    void SetData(const Vector4* data, const long& length);
+    /** Replace the data of an existing VBO in it's entirety. Must be same type. */
+    void SetData(const GLfloat* data, const long& count);
+    void SetData(const Vector2* data, const long& count);
+    void SetData(const Vector3* data, const long& count);
+    void SetData(const Vector4* data, const long& count);
 
-    void SetData(const GLuint* data, const long& length);
-    void SetData(const Vector2i* data, const long& length);
+    void SetData(const GLuint* data, const long& count);
+    void SetData(const Vector2i* data, const long& count);
 
     /** Update only a portion of the data in a VBO. Must be same type.
-     * "length" refers to the number of elements in data. Not the number of bytes.
      * "offset" refers the number of Typename T into the buffer the data you want to change is.
      * For ex, offset 0 and length of 1 overwrites the first value. Offset 1 the second etc */
-     void UpdateData(const GLfloat* data, const long& offset, const long& length);
-     void UpdateData(const Vector2* data, const long& offset, const long& length);
-     void UpdateData(const Vector3* data, const long& offset, const long& length);
-     void UpdateData(const Vector4* data, const long& offset, const long& length);
+     void UpdateData(const GLfloat* data, const long& offset, const long& count);
+     void UpdateData(const Vector2* data, const long& offset, const long& count);
+     void UpdateData(const Vector3* data, const long& offset, const long& count);
+     void UpdateData(const Vector4* data, const long& offset, const long& count);
 
-     void UpdateData(const GLuint* data, const long& offset, const long& length);
-     void UpdateData(const Vector2i* data, const long& offset, const long& length);
+     void UpdateData(const GLuint* data, const long& offset, const long& count);
+     void UpdateData(const Vector2i* data, const long& offset, const long& count);
 };

include/JGL/types/VertexArray.h

@@ -29,10 +29,10 @@ protected:
 protected:
     std::vector<Animation> animations{};
 protected:
-    VRamList vertices;
-    VRamList indices;
-    VRamList normals;
-    VRamList texture_coordinates;
+    VRamList* vertices;
+    VRamList* indices;
+    VRamList* normals;
+    VRamList* texture_coordinates;
 protected:
     /** For models which are not animated, This is intended for a low quality version in
      * system memory for calculations to be done on the CPU. For models that are, the default pose of the model is here.
@@ -43,10 +43,10 @@ protected:
     std::vector<Normal> local_normals{};
 public:
     /** Don't use these for anything other than drawing because the GPU is gonna spin during read-back */
-    [[nodiscard]] VRamList GetVertices() const;
-    [[nodiscard]] VRamList GetIndices() const;
-    [[nodiscard]] VRamList GetNormals() const;
-    [[nodiscard]] VRamList GetTextureCoordinates() const;
+    [[nodiscard]] const VRamList* GetVertices() const;
+    [[nodiscard]] const VRamList* GetIndices() const;
+    [[nodiscard]] const VRamList* GetNormals() const;
+    [[nodiscard]] const VRamList* GetTextureCoordinates() const;
 
     /** These are for cpu side calculations */
     [[nodiscard]] std::vector<Vertex> GetLocalVertices() const;
@@ -83,6 +83,7 @@ public:
     [[nodiscard]] AABB GetMEAABB(const Matrix3x3& rotation_matrix, const Vector3& scale = Vector3::One, const Vector3& translate_part = Vector3::Zero) const;
     [[nodiscard]] AABB GetMEAABB(const Matrix4x4& instance_matrix, bool translate = false) const;
 public:
+    VertexArray() = default;
     /// Vertices are required, Everything else is optional.
     VertexArray(const Vertex* vertex_positions, const long& vp_length, const unsigned int* vertex_indices = nullptr, const long& vi_length = 0,
                 const Normal* vertex_normals = nullptr, const long& vn_length = 0, const TextureCoordinate* texture_coordinates = nullptr, const long& vt_length = 0);
@@ -90,9 +91,13 @@ public:
     /// Vertices are required, Everything else is optional.
     explicit VertexArray(const std::vector<Vertex>& vertex_positions, const std::vector<unsigned int>& vertex_indices = {},
                          const std::vector<Normal>& vertex_normals = {}, const std::vector<TextureCoordinate>& texture_coordinates = {});
+
+    static VertexArray LoadWavefrontOBJ(const std::string& file_text);
+    static VertexArray LoadAMO(const std::string& file_text);
 };
 
+
 using namespace JGL;
+
 static VertexArray Animate(int animation_id, float animation_time);
 static VertexArray Animate(const AnimationState& anim_state);
-

main.cpp

@@ -1,17 +1,21 @@
 #include <JGL/JGL.h>
-#include <rewindow/types/window.h>
+#include <ReWindow/types/Window.h>
 #include <Colors.hpp>
 #include <chrono>
 #include <J3ML/LinearAlgebra/Vector2.hpp>
 #include <JGL/logger/logger.h>
+#include <J3ML/Geometry/AABB.hpp>
+#include <ReWindow/Logger.h>
+#include <JGL/types/VertexArray.h>
 
 using J3ML::LinearAlgebra::Vector2;
+using namespace JGL::Fonts;
 using namespace JGL;
+using JGL::Font;
 
-JGL::Font FreeSans;
-JGL::Font Jupiteroid;
 float fps = 0.0f;
 
+/// A draggable 2D point that highlights when moused over and when clicked.
 class Gizmo
 {
 public:
@@ -21,6 +25,15 @@ public:
     bool hovered = false;
     Vector2 position;
     float range = 6.f;
+    float base_radius = 3.f;
+    float hover_radius = 6.f;
+    float drag_radius = 4.f;
+    Color4 base_color = Colors::Reds::Salmon;
+    Color4 hover_color = Colors::Reds::Firebrick;
+    Color4 drag_color = Colors::White;
+    float lerp_rate = 0.25f;
+    float text_scale = 1.f;
+    int text_size = 12;
 
     void Grab() {
         if (hovered)
@@ -32,27 +45,25 @@ public:
 
     void Update(const Vector2& mouse) {
         if (dragging)
-            position = position.Lerp(mouse, 0.25f);
+            position = position.Lerp(mouse, lerp_rate);
 
         hovered = mouse.Distance(position) < range;
     }
 
     void Draw() {
-
-
         if (dragging)
-            J2D::DrawPoint(Colors::White, position, 4.f);
+            J2D::DrawPoint(drag_color, position, drag_radius);
         else if (hovered)
-            J2D::DrawPoint(Colors::Reds::Crimson, position, 6.f);
+            J2D::DrawPoint(hover_color, position, hover_radius);
         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);
+            J2D::DrawPoint(base_color, position, base_radius);
 
+        J2D::DrawString(Colors::White, std::format("{:.1f},{:.1f}", position.x, position.y), position.x, position.y, text_scale, text_size);
 
     }
 };
 
+/// A 3D Camera Controller.
 class Camera {
 public:
     Vector3 position = {0,0,0};
@@ -96,48 +107,46 @@ Gizmo b({200, 250});
 Gizmo c({350, 300});
 Gizmo d({450, 250});
 
+JGL::Font FreeSans;
 Texture* image;
-Texture* image2;
+Texture* image_mask;
 RenderTarget* j2d_render_target;
-RenderTarget* image2_render_target;
 
-class JGLDemoWindow : public ReWindow::RWindow
+class JGLDemoWindow : public ReWindow::OpenGLWindow
 {
 public:
     void initGL() {
         camera = new Camera;
 
-        if (!JGL::Init(getSize(), 75, 100))
+        if (!JGL::Init({ GetSize().x, GetSize().y}, 75, 100))
             Logger::Fatal("Initialization failed.");
 
+        // Load a custom font.
         FreeSans = JGL::Font("assets/fonts/FreeSans.ttf");
-        Jupiteroid = JGL::Font("assets/fonts/Jupiteroid.ttf");
 
         glClearColor(0.f, 0.f, 0.f, 0.f);
         glEnable(GL_DEPTH_TEST);
         glDepthFunc(GL_LESS);
         glDepthMask(GL_TRUE);
-        image = new Texture("assets/sprites/Re3D.png", TextureFilteringMode::BILINEAR);
-        j2d_render_target = new RenderTarget({540, 540}, {0,0,0,0}, false, MSAA_SAMPLE_RATE::MSAA_NONE);
-        image2 = image;
-        image2_render_target = new RenderTarget(image2);
+        image = new Texture("assets/sprites/Re3D.png", FilteringMode::BILINEAR);
+        image_mask = new Texture("assets/sprites/alpha_mask_2.png");
+        j2d_render_target = new RenderTarget({540, 500}, {0,0,0,0}, false, MSAA_SAMPLE_RATE::MSAA_NONE);
 
-        J2D::Begin(image2_render_target);
-            J2D::DrawString(Colors::Red, "TEST", 0, 16, 1, 16, FreeSans);
-            J2D::FillRect(Colors::Blue, {0,0}, {4,4});
-        J2D::End();
+        //Texture::MultiplyByAlphaMask(*image, *image_mask);
     }
 
-    Vector3 textAngle = {0,0,0};
+    EulerAngleXYZ textAngle = {0,0,0};
     float fov = 90;
+    u8 pulse = 0;
     float sprite_radians = 0;
     bool fov_increasing = true;
     int blit_pos = 0;
 
     void display() {
+        pulse++;
+        float dt = GetDeltaTime();
 
-        float dt = 1.f / fps;
-        JGL::Update(getSize());
+        JGL::Update({ GetSize().x, GetSize().y });
 
         if (fov_increasing)
             fov += 0.025;
@@ -151,7 +160,7 @@ public:
         //J3D::ChangeFOV(fov);
 
         sprite_radians += 0.005;
-        textAngle.y += (5.f * delta_time);
+        textAngle.yaw += 1;
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
         glMatrixMode(GL_MODELVIEW);
         glLoadIdentity();
@@ -159,28 +168,29 @@ public:
         camera->render();
         // All 3D elements of the scene and JGL elements *must* be rendered before the 2D stuff
         /* if rendering to screen space directly. */
+        auto test_light = PointLight({2,1,2}, {pulse,pulse,pulse, 255}, {pulse, pulse, pulse, 255}, {0,0,0}, 1, 0.1, 0.01);
+        // If a 3D object has transparency. The things you'd like to see through it must be drawn before.
+
         J3D::Begin();
             J3D::DrawLine(Colors::Red, {-0.33,-0.125,1}, {-1,-0.125,1});
             J3D::DrawLine(Colors::Red, {-0.33,-0.125,1}, {-0.33,0.25,1});
-            J3D::DrawString(Colors::Red, "JGL Sample Text", {-0.33, -0.1, 1.0f}, 1.f, 32, FreeSans, textAngle * 100, true);
+            J3D::DrawString(Colors::Red, "JGL Sample Text", {-0.33, -0.1, 1.0f}, 1.f, 32, FreeSans, textAngle, true);
             //J3D::WireframeSphere(Colors::Green, {0,0,0.5f}, 0.25f, 1, 128, 128);
-            Sphere sphere[5] = {{{0,0, 0.5f}, 0.2125}, {{0,0, 0.5f}, 0.025},{{0,0, 0.5f}, 0.05},{{0,0, 0.5f}, 0.075},{{0,0, 0.5f}, 0.1}};
-            J3D::BatchWireframeRevoSphere(Colors::Green, sphere, 1, 1, 16, 16, true);
-            //J3D::FillAABB(Colors::Whites::AliceBlue, {0,0,0.5f}, {0.1f, 0.05f, 0.1f});
-            //J3D::WireframeAABB(Colors::Gray, {0,0,0.5f}, {0.11f, 0.06f, 0.11f});
+            Sphere sphere = {{0,0, 0.5f}, 0.2125};
+            J3D::BatchWireframeRevoSphere(Colors::Green, &sphere, 1, 1, 8, 8, true);
+            J3D::RequiredLight(&test_light);
+            J3D::FillAABB(Colors::Whites::AliceBlue, {0,0,0.5f}, {0.05f, 0.05f, 0.05f});
+            J3D::WireframeAABB(Colors::Gray, {0,0,0.5f}, {0.11f, 0.06f, 0.11f});
 
-            J3D::WireframeOBB(Colors::Red, {0, 0, 1.5f}, {0.40f, 0.10f, 0.10f}, {0,textAngle.y, 0});
-
-            //J3D::DrawCubicBezierCurve(Colors::Blue, {0,0,0.3}, {0,0,0.5}, {0.2,0,0.3}, {0.2, 0.3, 0.1}, 30);
-
-            //J3D::WireframeIcosahedron(Colors::Green, {0,0,0.5f}, 0.125f, 1.f);
+            AABB boxes[1] = {{Vector3(-0.2125, -0.2125,0.28750), Vector3(0.2125,0.2125,0.7125)}};
+            J3D::BatchWireframeAABB(Colors::Yellow, boxes, 1, 1);
         J3D::End();
 
         J2D::Begin(j2d_render_target, true);
             J2D::FillRect(Colors::Blue, {0,52}, {100,100});
-            J2D::DrawSprite(image2, {300, 400}, sprite_radians * 0.10f, {0.5,0.5}, {1, 1}, Colors::White);
+            J2D::DrawSprite(image, {300, 400}, sprite_radians * 0.10f, {0.5,0.5}, {1, 1}, Colors::White);
             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}, {1,1}, Colors::White);
+            J2D::DrawPartialSprite(image, Vector2(225, 300), Vector2(image->GetDimensions()) * 0.25, Vector2(image->GetDimensions()) * 0.75, sprite_radians, {0.5, 0.5}, {1,1}, Colors::White);
             J2D::FillRect(Colors::Pinks::HotPink, {68, 120}, {32, 32});
             J2D::FillGradientRect(Colors::Red, Colors::Blue, Direction::Diagonal_SWNE, {100,52}, {100,100});
             J2D::FillRoundedRect(Colors::Red, {200, 52}, {100, 100}, 8, 8);
@@ -196,14 +206,12 @@ public:
             J2D::DrawGradientLine(Colors::Red, Colors::Blue, {105, 375}, {200, 275}, 2);
             auto result = Jupiteroid.MeasureString("Jupiteroid Font", 16);
 
-            //J2D::FillRect(Colors::Gray, {0, 0}, result);
             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);
             std::array<Vector2, 5> polygon = {Vector2(200, 400), {220, 420}, {220, 430}, {230, 410}, {200, 400}};
             J2D::OutlinePolygon(Colors::White, polygon.data(), polygon.size());
-            //J2D::FillPolygon(Colors::White, {{200, 400}, {220, 420}, {220, 430}, {230, 410}, {200, 400}});
             J2D::DrawCubicBezierCurve(Colors::Blues::CornflowerBlue,
                                       a.position,
                                       b.position,
@@ -216,45 +224,56 @@ public:
             c.Draw();
             d.Draw();
         J2D::End();
-        RenderTarget::Blit(Colors::Red, {0, 0}, j2d_render_target);
-
-        //Draw the Render Target that we just drew all that stuff onto.
 
         J2D::Begin();
-            J2D::DrawSprite(j2d_render_target, {0, 0}, 0, {0.5, 0.5}, {1,1}, Colors::White);
-            J2D::DrawSprite(image2_render_target, {300, 500}, 0, {0.5, 0.5}, {1,1}, Colors::White);
+            J2D::DrawRenderTarget(j2d_render_target, {0, 0});
+            J2D::DrawSprite(image, image_mask, {0, 0}, 0.25, {0.5, 0.5}, {1,1});
         J2D::End();
 
     }
 
     void OnRefresh(float elapsed) override {
-        if (isKeyDown(Keys::RightArrow))
+
+        fps = GetRefreshRate();
+
+        if (IsKeyDown(Keys::RightArrow))
             camera->angle.y += 45.f * elapsed;
-        if (isKeyDown(Keys::LeftArrow))
+        if (IsKeyDown(Keys::LeftArrow))
             camera->angle.y -= 45.f * elapsed;
-        if (isKeyDown(Keys::UpArrow))
+        if (IsKeyDown(Keys::UpArrow))
             camera->angle.x -= 45.f * elapsed;
-        if (isKeyDown(Keys::DownArrow))
+        if (IsKeyDown(Keys::DownArrow))
             camera->angle.x += 45.f * elapsed;
-        if (isKeyDown(Keys::Space))
+        if (IsKeyDown(Keys::Space))
             camera->position.y += 1.f * elapsed;
-        if (isKeyDown(Keys::LeftShift))
+        if (IsKeyDown(Keys::LeftShift))
             camera->position.y -= 1.f * elapsed;
 
+         //This is wrong of course. Just for testing purposes.
+        if (IsKeyDown(Keys::W))
+            camera->position.z += 1.f * elapsed;
+        if (IsKeyDown(Keys::S))
+            camera->position.z -= 1.f * elapsed;
+        if (IsKeyDown(Keys::A))
+            camera->position.x += 1.f * elapsed;
+        if (IsKeyDown(Keys::D))
+            camera->position.x -= 1.f * elapsed;
+
+
         auto mouse = GetMouseCoordinates();
-        a.Update(mouse);
-        b.Update(mouse);
-        c.Update(mouse);
-        d.Update(mouse);
+        a.Update({(float) mouse.x, (float) mouse.y});
+        b.Update({(float) mouse.x, (float) mouse.y});
+        c.Update({(float) mouse.x, (float) mouse.y});
+        d.Update({(float) mouse.x, (float) mouse.y});
         display();
         int glError = glGetError();
         if (glError != GL_NO_ERROR)
             std::cout << glError << std::endl;
-        glSwapBuffers();
+        SwapBuffers();
     }
 
 
-    void OnMouseButtonDown(const ReWindow::WindowEvents::MouseButtonDownEvent & ev) override
+    void OnMouseButtonDown(const ReWindow::MouseButtonDownEvent & ev) override
     {
         RWindow::OnMouseButtonDown(ev);
         a.Grab();
@@ -263,7 +282,7 @@ public:
         d.Grab();
     }
 
-    void OnMouseButtonUp(const ReWindow::WindowEvents::MouseButtonUpEvent & ev) override
+    void OnMouseButtonUp(const ReWindow::MouseButtonUpEvent & ev) override
     {
         RWindow::OnMouseButtonUp(ev);
         a.Release();
@@ -273,25 +292,37 @@ public:
     }
 
     bool OnResizeRequest(const ReWindow::WindowResizeRequestEvent& e) override {return true;}
-    JGLDemoWindow() : ReWindow::RWindow() {}
-    JGLDemoWindow(const std::string& title, int width, int height) : ReWindow::RWindow(title, width, height){}
+    JGLDemoWindow(const std::string& title, int width, int height) : ReWindow::OpenGLWindow(title, width, height, 2, 1) {}
 };
 
 int main(int argc, char** argv) {
-    auto* window = new JGLDemoWindow("JGL Demo Window", 1280, 720);
-    window->setRenderer(RenderingAPI::OPENGL);
-    window->Open();
-    window->initGL();
-    window->setResizable(true);
-    window->setVsyncEnabled(false);
 
-    while (window->isAlive()) {
-        std::chrono::high_resolution_clock::time_point start = std::chrono::high_resolution_clock::now();
-        window->pollEvents();
-        window->refresh();
-        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();
-    }
+    auto* window = new JGLDemoWindow("JGL Demo Window", 1280, 720);
+    if (!window->Open())
+        exit(-1);
+    window->initGL();
+    window->SetResizable(true);
+    window->SetVsyncEnabled(false);
+
+    std::ifstream file("assets/models/cube.amo");
+    if (!file.is_open())
+        return -1;
+
+    /*
+    std::stringstream buffer;
+    buffer << file.rdbuf();
+    std::string file_text = buffer.str();
+    file.close();
+    std::cout << file_text << std::endl;
+
+    auto result = VertexArray::LoadAMO(file_text);
+     */
+    
+    //ReWindow::Logger::Error.EnableConsole(false);
+    //ReWindow::Logger::Warning.EnableConsole(false);
+    //ReWindow::Logger::Debug.EnableConsole(false);
+
+    while (window->IsAlive())
+        window->ManagedRefresh();
     return 0;
 }

src/ShapeCache.cpp

@@ -0,0 +1,57 @@
+#include <JGL/JGL.h>
+
+void JGL::ShapeCache::Init() {
+    std::array<Vector3, 8> vertices = {
+            Vector3(1.0f,  1.0f, -1.0f),
+            Vector3(1.0f, -1.0f, -1.0f),
+            Vector3(1.0f,  1.0f,  1.0f),
+            Vector3(1.0f, -1.0f,  1.0f),
+            Vector3(-1.0f,  1.0f, -1.0f),
+            Vector3(-1.0f, -1.0f, -1.0f),
+            Vector3(-1.0f,  1.0f,  1.0f),
+            Vector3(-1.0f, -1.0f,  1.0f)
+    };
+    std::array<unsigned int, 36> indices = {
+            4, 2, 0,
+            2, 7, 3,
+            6, 5, 7,
+            1, 7, 5,
+            0, 3, 1,
+            4, 1, 5,
+            4, 6, 2,
+            2, 6, 7,
+            6, 4, 5,
+            1, 3, 7,
+            0, 2, 3,
+            4, 0, 1
+    };
+
+    std::array<Vector3, 8> vertex_normals = {
+            Vector3( 0.816f,  0.408f, -0.408f),
+            Vector3( 0.333f, -0.667f, -0.667f),
+            Vector3( 0.333f,  0.667f,  0.667f),
+            Vector3( 0.816f, -0.408f,  0.408f),
+            Vector3(-0.333f,  0.667f, -0.667f),
+            Vector3(-0.816f, -0.408f, -0.408f),
+            Vector3(-0.816f,  0.408f,  0.408f),
+            Vector3(-0.333f, -0.667f,  0.667f)
+    };
+
+    if (!cube_vertex_data)
+        cube_vertex_data = new VRamList(vertices.data(), vertices.size());
+
+    if (!cube_index_data)
+        cube_index_data = new VRamList(indices.data(), indices.size());
+
+    if (!cube_normal_data)
+        cube_normal_data = new VRamList(vertex_normals.data(), vertex_normals.size());
+
+    if (!square_origin_topleft_vertex_data) {
+        std::array<Vector2, 4> square_vertices = { Vector2(0, 0), {1, 0}, {1, -1}, {0, -1} };
+        square_origin_topleft_vertex_data = new VRamList(square_vertices.data(), square_vertices.size());
+    }
+    if (!j2d_default_normal_data) {
+        std::array<GLfloat, 3> normal {0, 0, 1};
+        j2d_default_normal_data = new VRamList(normal.data(), normal.size());
+    }
+}

src/renderer/OpenGL/J3D.cpp

@@ -0,0 +1,583 @@
+#include <JGL/JGL.h>
+#include <JGL/logger/logger.h>
+#include <J3ML/Geometry/AABB.hpp>
+#include <J3ML/Geometry/OBB.hpp>
+#include <J3ML/Algorithm/Bezier.hpp>
+#include <JGL/types/Light.h>
+#include "internals/internals.h"
+
+
+std::array<GLfloat, 16> JGL::OpenGLPerspectiveProjectionRH(float fovY, float aspect, float z_near, float z_far) {
+    std::array<GLfloat, 16> result{};
+    GLfloat f = 1.0f / std::tan(fovY * 0.5f * Math::Pi / 180.0f);
+    result[0] = f / aspect;
+    result[5] = f;
+    result[10] = (z_far + z_near) / (z_near - z_far);
+    result[11] = -1.0f;
+    result[14] = (2.0f * z_far * z_near) / (z_near - z_far);
+    return result;
+}
+
+void JGL::J3D::ChangeFOV(float fov) {
+    JGL::J3D::fov = fov;
+}
+
+void JGL::J3D::ChangeFarPlane(float far_plane) {
+    JGL::J3D::far_plane = far_plane;
+}
+
+void JGL::J3D::RequiredLight(const JGL::LightBase* light) {
+    bool success = false;
+    for (auto& i : current_state.required_lights)
+        if (i == nullptr) {
+            i = light;
+            success = true;
+            break;
+        }
+
+    if (!success)
+        Logger::Error("You cannot specify more than 8 required lights.");
+}
+
+void JGL::J3D::OptionalLights(const JGL::LightBase** lights, const size_t& light_count) {
+    for (size_t i = 0; i < light_count; i++)
+        current_state.optional_lights.push_back(lights[i]);
+}
+
+void JGL::J3D::Begin(bool two_pass) {
+    auto aspect = (float) window_size.x / (float) window_size.y;
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glMultMatrixf(OpenGLPerspectiveProjectionRH(fov, aspect, 0.001, far_plane).data());
+    glMatrixMode(GL_MODELVIEW);
+
+    //Get what the draw color was before we did anything.
+    glGetFloatv(GL_CURRENT_COLOR, current_state.draw_color);
+    glColor4fv(current_state.draw_color);
+
+    if (!glIsEnabled(GL_DEPTH_TEST))
+        current_state.depth_test = false,
+        glEnable(GL_DEPTH_TEST);
+    else
+        current_state.depth_test = true;
+
+    current_state.vertex_array = false;
+    if (!glIsEnabled(GL_VERTEX_ARRAY))
+        current_state.vertex_array = false,
+        glEnableClientState(GL_VERTEX_ARRAY);
+
+    if (glIsEnabled(GL_NORMAL_ARRAY))
+        current_state.normal_array = true,
+        glDisableClientState(GL_NORMAL_ARRAY);
+
+    if (glIsEnabled(GL_TEXTURE_COORD_ARRAY))
+        current_state.texture_coordinate_array = true,
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+
+    if (glIsEnabled(GL_TEXTURE_2D))
+        current_state.texture_2D = true,
+        glDisable(GL_TEXTURE_2D);
+
+    current_state.cull_face = false;
+    if (glIsEnabled(GL_CULL_FACE))
+        current_state.cull_face = true,
+        glDisable(GL_CULL_FACE);
+
+    if (!glIsEnabled(GL_BLEND))
+        current_state.blend = false,
+        glEnable(GL_BLEND),
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    else
+        current_state.blend = true;
+
+    // Reset the lights.
+    current_state.required_lights = empty_light_array;
+    current_state.optional_lights = {};
+
+    glDisable(GL_LIGHTING);
+}
+
+void JGL::J3D::End() {
+    if (!current_state.depth_test)
+        glDisable(GL_DEPTH_TEST);
+
+    if (!current_state.vertex_array)
+        glDisableClientState(GL_VERTEX_ARRAY);
+
+    if (current_state.texture_2D)
+        glEnable(GL_TEXTURE_2D);
+
+    if (!current_state.blend)
+        glDisable(GL_BLEND);
+
+    if (current_state.cull_face)
+        glEnable(GL_CULL_FACE);
+
+    if (current_state.normal_array)
+        glEnableClientState(GL_NORMAL_ARRAY);
+
+    if (current_state.texture_coordinate_array)
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+    if (glIsEnabled(GL_LIGHTING)) {
+        glDisable(GL_LIGHTING);
+        glDisable(GL_LIGHT0);
+        glDisable(GL_LIGHT1);
+        glDisable(GL_LIGHT2);
+        glDisable(GL_LIGHT3);
+        glDisable(GL_LIGHT4);
+        glDisable(GL_LIGHT5);
+        glDisable(GL_LIGHT6);
+        glDisable(GL_LIGHT7);
+    }
+
+    current_state.required_lights = empty_light_array;
+    current_state.optional_lights = {};
+
+    //Put the draw color back how it was before.
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::DrawLine(const Color4& color, const Vector3& A, const Vector3& B, float thickness) {
+    Vector3 vertices[] = {A, B};
+
+    glLineWidth(thickness);
+    glColor4ubv(color.ptr());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), vertices);
+    glDrawArrays(GL_LINES, 0, 2);
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::WireframeSphere(const Color4& color, const Vector3& position, float radius, float thickness, unsigned int sectors, unsigned int stacks) {
+    Sphere sphere = {position, radius};
+    BatchWireframeSphere(color,& sphere, 1, thickness, sectors, stacks);
+}
+
+void JGL::J3D::WireframeSphere(const Color4& color, const Sphere& sphere, float thickness, unsigned int sectors, unsigned int stacks) {
+    BatchWireframeSphere(color,& sphere, 1, thickness, sectors, stacks);
+}
+
+void JGL::J3D::BatchWireframeSphere(const Color4& color, const Sphere* spheres, const size_t& sphere_count, float thickness, unsigned int sectors, unsigned int stacks) {
+    // Create one sphere with a radius of 1 about 0, 0.
+    float r = 1;
+    std::vector<Vector3> vertices((sectors + 1) * (stacks + 1));
+
+    int index = 0;
+    for (int i = 0; i <= sectors; i++) {
+        float lat = J3ML::Math::Pi * (-0.5 + (float) i / sectors);
+        float z = J3ML::Math::Sin(lat);
+        float zr = J3ML::Math::Cos(lat);
+
+        for (int j = 0; j <= stacks; j++) {
+            float lng = 2 * J3ML::Math::Pi * (float) (j - 1) / stacks;
+            float x = J3ML::Math::Cos(lng);
+            float y = J3ML::Math::Sin(lng);
+
+            float pos_x = r * x * zr;
+            float pos_y = r * y * zr;
+            float pos_z = r * z;
+
+            vertices[index++] = Vector3(pos_x, pos_y, pos_z);
+        }
+    }
+
+    glLineWidth(thickness);
+    glColor4ubv(color.ptr());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), vertices.data());
+
+    // Render each sphere in the batch at their given position and radius.
+    for(size_t i = 0; i < sphere_count; i++) {
+        glPushMatrix();
+        glTranslatef(spheres[i].Position.x, spheres[i].Position.y, spheres[i].Position.z);
+        glScalef(spheres[i].Radius, spheres[i].Radius, spheres[i].Radius);
+        glDrawArrays(GL_LINE_LOOP, 0, vertices.size());
+        glPopMatrix();
+    }
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::WireframeRevoSphere(const Color4& color, const Vector3& position, float radius, float thickness, unsigned int sectors, unsigned int revolutions, bool draw_stacks) {
+    Sphere sphere = {position, radius};
+    BatchWireframeRevoSphere(color,& sphere, 1, thickness, sectors, revolutions, draw_stacks);
+}
+
+void JGL::J3D::WireframeRevoSphere(const Color4& color, const Sphere& sphere, float thickness, unsigned int sectors, unsigned int revolutions, bool draw_stacks) {
+    BatchWireframeRevoSphere(color,& sphere, 1, thickness, sectors, revolutions, draw_stacks);
+}
+
+void JGL::J3D::BatchWireframeRevoSphere(const Color4& color, const Sphere* spheres, const size_t& sphere_count, float thickness, unsigned int sectors, unsigned int revolutions, bool draw_stacks) {
+    float r = 1;
+    std::vector<Vector3> vertices;
+    vertices.reserve((sectors + 1) * (revolutions + 1));
+
+    std::vector<Vector3> cross_section(sectors + 1);
+    for (int i = 0; i <= sectors; i++) {
+        float lat = J3ML::Math::Pi * (-0.5 + (float)i / sectors);
+        float z = J3ML::Math::Sin(lat);
+        float zr = J3ML::Math::Cos(lat);
+        cross_section[i] = Vector3(0, zr * r, z * r);
+    }
+
+    // Revolve
+    for (int j = 0; j <= revolutions; j++) {
+        float lng = 2 * J3ML::Math::Pi * (float)j / revolutions;
+        float cosLng = J3ML::Math::Cos(lng);
+        float sinLng = J3ML::Math::Sin(lng);
+
+        for (const auto& point : cross_section) {
+            float pos_x = point.y * cosLng;
+            float pos_y = point.y * sinLng;
+            float pos_z = point.z;
+
+            vertices.emplace_back(pos_x, pos_y, pos_z);
+        }
+    }
+
+    glLineWidth(thickness);
+    glColor4ubv(color.ptr());
+
+    VRamList vertex_data(vertices.data(), vertices.size());
+    glBindBuffer(GL_ARRAY_BUFFER, vertex_data.GetHandle());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), nullptr);
+
+    // Render each sphere in the batch at their given position and radius.
+    for(size_t i = 0; i < sphere_count; i++) {
+        glPushMatrix();
+        glTranslatef(spheres[i].Position.x, spheres[i].Position.y, spheres[i].Position.z);
+        glScalef(spheres[i].Radius, spheres[i].Radius, spheres[i].Radius);
+        glDrawArrays(GL_LINE_LOOP, 0, vertex_data.GetLength());
+        if (draw_stacks)
+            glRotatef(90, 0, 1, 0),
+                    glDrawArrays(GL_LINE_LOOP, 0, vertex_data.GetLength());
+        glPopMatrix();
+    }
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::WireframeIcosphere(const Color4& color, const Vector3& position, float radius, float thickness, unsigned int subdivisions) {
+
+    // NOTE2SELF: Code i'm borrowing this from uses float-packed-arrays rather than discrete Vectors
+    // working on translating that correctly...
+
+    // TODO: Revise this once J3ML::Geometry::Icosahedron is implemented.
+    const float h_angle = J3ML::Math::Pi / 180.f * 72.f;    // 72 degree = 360 / 5;
+    const float v_angle = J3ML::Math::Atan(1.0f / 2.f);     // elevation = 26.565;
+
+    std::vector<Vector3> vertices;                   // array of 12 vertices (x,y,z)
+    unsigned int index = 0;                                      // indices
+    float z, xy;                                        // coords
+    float hAngle1 = -Math::Pi / 2.f - h_angle / 2.f;    // start from -126 at 1st row
+    float hAngle2 = -Math::Pi / 2.f;                    // start from -90 deg at 2nd row
+
+    // the first top vertex at (0,0,r)
+    vertices[0] = position + Vector3{0,0,radius};
+
+
+
+    // compute 10 vertices at 1st and 2nd rows
+    for (int i = 1; i <= 5; ++i)
+    {
+
+        z  = radius * Math::Sin(v_angle);   // elevation
+        xy = radius * Math::Cos(v_angle);   // length on XY plane
+
+        vertices[index++] = position + Vector3{xy * Math::Cos(hAngle1), xy * Math::Sin(hAngle1), z} ;
+        vertices[index++] = position + Vector3{xy * Math::Cos(hAngle2), xy * Math::Sin(hAngle2), -z};
+
+        // next horizontal angles
+        hAngle1 += h_angle;
+        hAngle2 += h_angle;
+    }
+
+    // the last bottom vertex at (0, 0, -r)
+    vertices[11] = position + Vector3{0,0, -radius};
+
+    //glLineWidth(thickness);
+    //glColor4ubv(color.ptr());
+    //glBindBuffer(GL_ARRAY_BUFFER, vertices.size());
+    //glVertexPointer(3, GL_FLOAT, sizeof(Vector3), vertices.data());
+    //glDrawArrays(GL_TRIANGLE_STRIP, 0, vertices.size());
+    //glColor4fv(baseColor);
+
+    std::vector<Vector3> tmpVertices;
+    std::vector<Vector3> tmpIndices;
+    std::vector<Vector2> newVs((subdivisions+1) * (subdivisions+2) / 2 * 3);
+    const Vector3 v1, v2, v3;
+    Vector3 newV1, newV2, newV3;
+
+    int i, j, k;
+    index = 0;              // unsigned int
+    float a;                // lerp alpha
+    unsigned int i1, i2;    // indices
+
+    // copy prev arrays
+    tmpVertices = vertices;
+    //tmpIndices = indices;
+
+    // iterate each triangle of icosahedron
+    for (i = 0; i < tmpIndices.size(); i++)
+    {
+        //v1 = tmpVertices[tmpIndices[i]];
+        //v2 = tmpVertices[tmpIndices[i+1]];
+        //v3 = tmpVertices[tmpIndices[i+2]];
+
+    }
+}
+
+void JGL::J3D::WireframeIcosahedron(const Color4& color, const Vector3& position, float radius, float thickness) {
+    // TODO: Revise this once J3ML::Geometry::Icosahedron is implemented.
+    const float h_angle = J3ML::Math::Pi / 180.f * 72.f;    // 72 degree = 360 / 5;
+    const float v_angle = J3ML::Math::Atan(1.0f / 2.f);     // elevation = 26.565;
+
+    std::array<Vector3, 12> vertices;                   // array of 12 vertices (x,y,z)
+    int index = 0;                                      // indices
+    float z, xy;                                        // coords
+    float hAngle1 = -Math::Pi / 2.f - h_angle / 2.f;    // start from -126 at 1st row
+    float hAngle2 = -Math::Pi / 2.f;                    // start from -90 deg at 2nd row
+
+    // the first top vertex at (0,0,r)
+    vertices[0] = position + Vector3{0,0,radius};
+
+
+
+    // compute 10 vertices at 1st and 2nd rows
+    for (int i = 1; i <= 5; ++i)
+    {
+
+        z  = radius * Math::Sin(v_angle);   // elevation
+        xy = radius * Math::Cos(v_angle);   // length on XY plane
+
+        vertices[index++] = position + Vector3{xy * Math::Cos(hAngle1), xy * Math::Sin(hAngle1), z} ;
+        vertices[index++] = position + Vector3{xy * Math::Cos(hAngle2), xy * Math::Sin(hAngle2), -z};
+
+        // next horizontal angles
+        hAngle1 += h_angle;
+        hAngle2 += h_angle;
+    }
+
+    // the last bottom vertex at (0, 0, -r)
+    vertices[11] = position + Vector3{0,0, -radius};
+
+    glLineWidth(thickness);
+    glColor4ubv(color.ptr());
+    //glBindBuffer(GL_ARRAY_BUFFER, vertices.size());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), vertices.data());
+    glDrawArrays(GL_TRIANGLE_STRIP, 0, vertices.size());
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::BatchWireframeAABB(const Color4& color, const AABB* boxes, const size_t& box_count, float thickness) {
+    glColor4ubv(color.ptr());
+    glLineWidth(thickness);
+
+    glBindBuffer(GL_ARRAY_BUFFER, ShapeCache::cube_vertex_data->GetHandle());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), nullptr);
+
+    for (size_t i = 0; i < box_count; i++) {
+        Vector3 delta = (boxes[i].maxPoint - boxes[i].minPoint) / 2;
+        Vector3 center = boxes[i].Centroid();
+        glPushMatrix();
+        glTranslatef(center.x, center.y, center.z);
+        glScalef(delta.x, delta.y, delta.z);
+        glDrawArrays(GL_LINES, 0, ShapeCache::cube_vertex_data->GetLength());
+        glPopMatrix();
+    }
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::WireframeAABB(const Color4& color, const Vector3& pos, const Vector3& radii, float thickness) {
+    AABB aabb = {Vector3(pos.x - radii.x, pos.y - radii.y, pos.z - radii.z), Vector3(pos.x + radii.x, pos.y + radii.y, pos.z + radii.z)};
+    BatchWireframeAABB(color, &aabb, 1, thickness);
+}
+
+void JGL::J3D::BatchFillAABB(const Color4& color, const AABB* boxes, const size_t& box_count) {
+    glColor4ubv(color.ptr());
+
+    glBindBuffer(GL_ARRAY_BUFFER, ShapeCache::cube_vertex_data->GetHandle());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), nullptr);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ShapeCache::cube_index_data->GetHandle());
+
+    glEnable(GL_CULL_FACE);
+    glCullFace(GL_BACK);
+
+    bool using_lights = false;
+    if (UsingLighting()) {
+        using_lights = true;
+        glEnableClientState(GL_NORMAL_ARRAY);
+        glBindBuffer(GL_ARRAY_BUFFER, ShapeCache::cube_normal_data->GetHandle());
+        glNormalPointer(GL_FLOAT, sizeof(float), nullptr);
+    }
+
+    for (size_t i = 0; i < box_count; i++) {
+        Vector3 delta = (boxes[i].maxPoint - boxes[i].minPoint) / 2;
+        Vector3 center = boxes[i].Centroid();
+        glPushMatrix();
+        glTranslatef(center.x, center.y, center.z);
+        glScalef(delta.x, delta.y, delta.z);
+        if (using_lights)
+            SelectLights(center);
+        glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_INT, nullptr);
+        if (using_lights)
+            ResetLights();
+
+        glPopMatrix();
+    }
+    glColor4fv(current_state.draw_color);
+    if (using_lights)
+        glDisableClientState(GL_NORMAL_ARRAY);
+    glDisable(GL_CULL_FACE);
+}
+void JGL::J3D::FillAABB(const Color4& color, const Vector3& pos, const Vector3& radii) {
+    AABB box = {pos - radii, pos + radii};
+    BatchFillAABB(color, &box, 1);
+}
+
+void JGL::J3D::FillAABB(const Color4& color, const AABB& aabb) {
+    BatchFillAABB(color, &aabb, 1);
+}
+
+void JGL::J3D::FillSphere(const Color4& color, const Sphere& sphere, unsigned int sectors, unsigned int stacks) {
+    BatchFillSphere(color, &sphere, 1, sectors, stacks);
+}
+
+void JGL::J3D::BatchFillSphere(const Color4& color, const Sphere* spheres, const size_t& sphere_count, unsigned int sectors, unsigned int stacks) {
+    float r = 1;
+    std::vector<Vector3> vertices((sectors + 1) * (stacks + 1));
+    std::vector<unsigned int> indices; indices.reserve(sectors * stacks * 6);
+
+    float two_pi = 2 * J3ML::Math::Pi;
+    int index = 0;
+    for (int i = 0; i <= sectors; i++) {
+        float lat = J3ML::Math::Pi * (-0.5 + (float) i / sectors);
+        float z = J3ML::Math::Sin(lat);
+        float zr = J3ML::Math::Cos(lat);
+
+        for (int j = 0; j <= stacks; j++) {
+            float lng =  two_pi * (float) (j - 1) / stacks;
+            float x = J3ML::Math::Cos(lng);
+            float y = J3ML::Math::Sin(lng);
+
+            float pos_x = r * x * zr;
+            float pos_y = r * y * zr;
+            float pos_z = r * z;
+            vertices[index++] = Vector3(pos_x, pos_y, pos_z);
+        }
+    }
+
+    for (int i = 0; i < sectors; i++) {
+        for (int j = 0; j < stacks; j++) {
+            int first_index = i * (stacks + 1) + j;
+            int second_index = first_index + stacks + 1;
+
+            indices.push_back(first_index);
+            indices.push_back(second_index);
+            indices.push_back(first_index + 1);
+
+            indices.push_back(second_index);
+            indices.push_back(second_index + 1);
+            indices.push_back(first_index + 1);
+        }
+    }
+
+    VRamList vertex_data(vertices.data(), vertices.size());
+    VRamList index_data(indices.data(), indices.size());
+
+    glColor4ubv(color.ptr());
+    glBindBuffer(GL_ARRAY_BUFFER, vertex_data.GetHandle());
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_data.GetHandle());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), nullptr);
+
+    for (size_t i = 0; i < sphere_count; i++) {
+        const Vector3 position = spheres[i].Position;
+        glPushMatrix();
+        glTranslatef(position.x, position.y, position.z);
+        glScalef(spheres[i].Radius, spheres[i].Radius, spheres[i].Radius);
+        glDrawElements(GL_TRIANGLES, index_data.GetLength(), GL_UNSIGNED_INT, nullptr);
+        glPopMatrix();
+    }
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::FillSphere(const Color4& color, const Vector3& position, float radius, unsigned int sectors, unsigned int stacks) {
+    Sphere sphere = {position, radius};
+    BatchFillSphere(color, &sphere, 1, sectors, stacks);
+}
+
+void JGL::J3D::WireframeAABB(const Color4& color, const AABB& aabb, float thickness) {
+    BatchWireframeAABB(color, &aabb, 1, thickness);
+}
+
+// TODO Make it work the same as AABB batching. I couldn't get rotation to do anything more than twitch in place :(.
+void JGL::J3D::BatchWireframeOBB(const Color4& color, const OBB* boxes, const size_t& box_count, float thickness) {
+    std::array<Vector3, 8> corner_points;
+    std::array<GLuint, 24> indices =
+            {
+                    0, 1, 1, 2, 2, 3, 3, 0,
+                    4, 5, 5, 6, 6, 7, 7, 4,
+                    0, 4, 1, 5, 2, 6, 3, 7
+            };
+
+    glLineWidth(thickness);
+    glColor4ubv(color.ptr());
+    glVertexPointer(3, GL_FLOAT, sizeof(Vector3), corner_points.data());
+
+    for (size_t i = 0; i < box_count; i++) {
+        boxes[i].GetCornerPoints(corner_points.data());
+        glPushMatrix();
+        glTranslatef(boxes[i].pos.x, boxes[i].pos.y, boxes[i].pos.z);
+        glDrawElements(GL_LINES, indices.size(), GL_UNSIGNED_INT, indices.data());
+        glPopMatrix();
+    }
+    glColor4fv(current_state.draw_color);
+}
+
+void JGL::J3D::WireframeOBB(const Color4& color, const OBB& obb, float thickness) {
+    BatchWireframeOBB(color, &obb, 1, thickness);
+}
+
+/*
+void JGL::J3D::WireframeOBB(const Color4& color, const Vector3& position, const Vector3& radii, const Matrix3x3& orientation, float thickness) {
+    WireframeOBB(color, OBB(position, radii, orientation. * Vector3::UnitX, rotation * Vector3::UnitY, rotation * Vector3::UnitZ), thickness);
+}
+ */
+
+void JGL::J3D::DrawCubicBezierCurve(const Color4& color, const Vector3& controlA, const Vector3& pointA,
+                               const Vector3& pointB, const Vector3& controlB, int subdivisions, float thickness) {
+    Vector3 last = controlA;
+    const Vector3& first = controlB;
+    for (int i = 0; i < subdivisions; ++i)
+    {
+        float alpha = (float) i / (float) subdivisions;
+        Vector3 step = J3ML::Algorithm::Bezier(alpha, controlA, pointA, pointB, controlB);
+        DrawLine(color, last, step, thickness);
+        last = step;
+    }
+
+    // Have to manually draw the last segment of the curve.
+    DrawLine(color, last, first, thickness);
+}
+
+void JGL::J3D::DrawVertexArray(const Color4& color, const VertexArray& vertex_array, const Vector3& position) {
+    glColor4ubv(color.ptr());
+
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glBindBuffer(GL_ARRAY_BUFFER, vertex_array.GetVertices()->GetHandle());
+    glVertexPointer(3, GL_FLOAT, 0, nullptr);
+
+    glPushMatrix();
+    glTranslatef(position.x, position.y, position.z);
+        //glScalef(1,1,1);
+        glDrawArrays(GL_TRIANGLES, 0, vertex_array.GetVertices()->GetLength());
+    glPopMatrix();
+
+        //glDrawElements(GL_LINES, vertex_array.GetIndices()->GetLength(), GL_UNSIGNED_INT, nullptr);
+        //std::cout << vertex_array.GetVertices()->GetLength() << std::endl;
+    glColor4fv(current_state.draw_color);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+}

src/renderer/OpenGL/TextRendering.cpp

@@ -1,4 +1,5 @@
 #include <JGL/JGL.h>
+#include "internals/internals.h"
 
 
 #if __linux__
@@ -157,12 +158,12 @@ namespace JGL {
         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);
+        glColor4fv(default_state.draw_color);
         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
         glDisable(GL_TEXTURE_2D);
     }
 
-    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) {
+    void J3D::DrawString(const Color4& color, const std::string& text, const Vector3& pos, float scale, u32 size, const Font& font, const EulerAngleXYZ& angle, bool draw_back_face) {
         // TODO: Determine the proper scale factor mathematically
         // This number was arrived at holistically.
         scale = scale * 0.002f;
@@ -243,7 +244,7 @@ namespace JGL {
             glDisable(GL_CULL_FACE);
 
         glBindTexture(GL_TEXTURE_2D, 0);
-        glColor4f(1, 1, 1, 1);
+        glColor4fv(current_state.draw_color);
         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
         glDisable(GL_TEXTURE_2D);
         glPopMatrix();

src/renderer/OpenGL/internals/internals.cpp

@@ -0,0 +1,210 @@
+#include "internals.h"
+#include <J3ML/LinearAlgebra/Vector4.hpp>
+#include <JGL/types/Light.h>
+
+// TODO handle the case that a required light is in the list of optional lights.
+void JGL::J3D::SelectLights(const Vector3& position) {
+    std::array<const LightBase*, 8> result = current_state.required_lights;
+
+    unsigned int required_light_count = 0;
+    for (const auto& i : result)
+        if (i) required_light_count++;
+
+    // If there is optional lights.
+    if (!current_state.optional_lights.empty()) {
+        // The number of lights we need to solve for
+        unsigned int remaining_lights = 8 - required_light_count;
+
+        std::vector<std::pair<float, const LightBase*>> light_influence;
+        for (const auto* light: current_state.optional_lights)
+            light_influence.emplace_back(light->GetAttenuationAtPosition(position), light);
+
+        // Sort by biggest influence.
+        std::sort(light_influence.begin(), light_influence.end(),
+                  [](const auto &a, const auto &b) { return a.first > b.first; });
+
+        // Add in optional lights.
+        for (unsigned int i = 0; i < remaining_lights && i < light_influence.size(); i++)
+            result[required_light_count++] = light_influence[i].second;
+    }
+
+    glEnable(GL_LIGHTING);
+    for (unsigned int i = 0; i < result.size(); i++) {
+        // Terminate early if we have less than 8 lights.
+        if (!result[i])
+            break;
+
+        Vector4 ambient = { result[i]->GetAmbient().RN(), result[i]->GetAmbient().GN(), result[i]->GetAmbient().BN(), result[i]->GetAmbient().AN() };
+        Vector4 diffuse = { result[i]->GetDiffuse().RN(), result[i]->GetDiffuse().GN(), result[i]->GetDiffuse().BN(), result[i]->GetDiffuse().AN() };
+        Vector4 specular = { result[i]->GetSpecular().RN(), result[i]->GetSpecular().GN(), result[i]->GetSpecular().BN(), result[i]->GetSpecular().AN() };
+        GLenum current_light = GL_LIGHT0 + i;
+
+        glEnable(GL_LIGHT0 + i);
+        glLightfv(current_light, GL_POSITION, result[i]->GetPosition().ptr());
+
+        // How the light will affect different materials.
+        glLightfv(current_light, GL_AMBIENT, ambient.ptr());
+        glLightfv(current_light, GL_DIFFUSE, diffuse.ptr());
+        glLightfv(current_light, GL_SPECULAR, specular.ptr());
+
+        // How far the light goes.
+        glLightf(current_light, GL_CONSTANT_ATTENUATION, result[i]->GetConstantAttenuation());
+        glLightf(current_light, GL_LINEAR_ATTENUATION, result[i]->GetLinearAttenuation());
+        glLightf(current_light, GL_QUADRATIC_ATTENUATION, result[i]->GetQuadraticAttenuation());
+    }
+}
+
+void JGL::J3D::ResetLights() {
+    Vector4 position = {0, 0, 1, 0};
+    Vector4 ambient = {0, 0, 0, 1};
+    Vector4 diffuse_light0 = {1,1,1,1};
+    Vector4 diffuse = {0,0,0,1};
+    Vector4 specular_light0 = {1,1,1,1};
+    Vector4 specular = {0,0,0,1};
+    Vector3 spot_direction = {0.0, 0.0, -1.0};
+
+    for (unsigned int i = 0; i < 8; i++) {
+        GLenum current_light = GL_LIGHT0 + i;
+
+        glLightfv(current_light, GL_POSITION, position.ptr());
+        glLightfv(current_light, GL_AMBIENT, ambient.ptr());
+        glLightf(current_light, GL_CONSTANT_ATTENUATION, 1);
+        glLightf(current_light, GL_LINEAR_ATTENUATION, 0);
+        glLightf(current_light, GL_QUADRATIC_ATTENUATION, 0);
+        glLightf(current_light, GL_SPOT_CUTOFF, 180.0);
+        glLightfv(current_light, GL_SPOT_DIRECTION, spot_direction.ptr());
+        glLightf(current_light, GL_SPOT_EXPONENT, 0.0);
+        glLightfv(current_light, GL_DIFFUSE, (i == 0 ? diffuse_light0.ptr() : diffuse.ptr()));
+        glLightfv(current_light, GL_SPECULAR, (i == 0 ? specular_light0.ptr() : specular.ptr()));
+        glDisable(current_light);
+    }
+    glDisable(GL_LIGHTING);
+}
+
+bool JGL::J3D::UsingLighting() {
+    if (!current_state.optional_lights.empty())
+        return true;
+
+    for (unsigned int i = 0; i < current_state.required_lights.size(); i++)
+        if (current_state.required_lights[i])
+            return true;
+    return false;
+}
+
+std::vector<Vector3> JGL::TriangleMeshVertexNormals(const Vector3* vertices, const size_t& vertex_count, const unsigned int* indices, const size_t& index_count) {
+    std::vector<Vector3> normals(vertex_count, Vector3(0, 0, 0));
+
+    for (size_t i = 0; i < index_count; i += 3) {
+        GLuint i1 = indices[i];
+        GLuint i2 = indices[i + 1];
+        GLuint i3 = indices[i + 2];
+
+        Vector3 v1 = vertices[i1];
+        Vector3 v2 = vertices[i2];
+        Vector3 v3 = vertices[i3];
+
+        Vector3 edge1 = v2 - v1;
+        Vector3 edge2 = v3 - v1;
+
+        Vector3 faceNormal = Vector3::Cross(edge1, edge2);
+
+        normals[i1] += faceNormal;
+        normals[i2] += faceNormal;
+        normals[i3] += faceNormal;
+    }
+    for (auto& normal : normals)
+        normal = normal.Normalized();
+
+    return normals;
+}
+
+void JGL::StateStack::Push(const JGL::State& state) {
+    states.push_back(state);
+}
+
+void JGL::StateStack::Pop() {
+    states.pop_back();
+}
+
+JGL::State* JGL::StateStack::PreviousState() {
+    if (states.empty())
+        return nullptr;
+
+    return &states.back();
+}
+
+JGL::State JGL::State::SaveState() {
+    State result;
+
+    result.depth_test = glIsEnabled(GL_DEPTH_TEST);
+    result.vertex_array = glIsEnabled(GL_VERTEX_ARRAY);
+    result.normal_array = glIsEnabled(GL_NORMAL_ARRAY);
+    result.cull_face = glIsEnabled(GL_CULL_FACE);
+    result.blend = glIsEnabled(GL_BLEND);
+    result.texture_2D = glIsEnabled(GL_TEXTURE_2D);
+    result.texture_coordinate_array = glIsEnabled(GL_TEXTURE_COORD_ARRAY);
+    result.color_array = glIsEnabled(GL_COLOR_ARRAY);
+
+    glGetIntegerv(GL_ACTIVE_TEXTURE, &result.selected_texture_unit);
+    result.selected_texture_unit -= GL_TEXTURE0;
+
+    glGetFloatv(GL_COLOR_CLEAR_VALUE, result.clear_color);
+    glGetFloatv(GL_CURRENT_COLOR, result.draw_color);
+    glGetIntegerv(GL_VIEWPORT, result.viewport);
+    glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*)&result.current_fbo);
+    glGetIntegerv(GL_BLEND_SRC, &result.blend_func[0]);
+    glGetIntegerv(GL_BLEND_DST, &result.blend_func[1]);
+
+    return result;
+}
+
+void JGL::State::RestoreState(const State& state) {
+    if (state.depth_test)
+        glEnable(GL_DEPTH_TEST);
+    else
+        glDisable(GL_DEPTH_TEST);
+
+    if (state.vertex_array)
+        glEnableClientState(GL_VERTEX_ARRAY);
+    else
+        glDisableClientState(GL_VERTEX_ARRAY);
+
+    if (state.normal_array)
+        glEnableClientState(GL_NORMAL_ARRAY);
+    else
+        glDisableClientState(GL_NORMAL_ARRAY);
+
+    if (state.cull_face)
+        glEnable(GL_CULL_FACE);
+    else
+        glDisable(GL_CULL_FACE);
+
+    if (state.blend)
+        glEnable(GL_BLEND);
+    else
+        glDisable(GL_BLEND);
+
+    glActiveTexture(GL_TEXTURE0 + state.selected_texture_unit);
+    glClientActiveTexture(GL_TEXTURE0 + state.selected_texture_unit);
+
+    if (state.texture_2D)
+        glEnable(GL_TEXTURE_2D);
+    else
+        glDisable(GL_TEXTURE_2D);
+
+    if (state.texture_coordinate_array)
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    else
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+
+    if (state.color_array)
+        glEnable(GL_COLOR_ARRAY);
+    else
+        glDisable(GL_COLOR_ARRAY);
+
+    glBindFramebuffer(GL_FRAMEBUFFER, state.current_fbo);
+    glViewport(state.viewport[0], state.viewport[1], state.viewport[2], state.viewport[3]);
+    glClearColor(state.clear_color[0], state.clear_color[1], state.clear_color[2], state.clear_color[3]);
+    glColor4f(state.draw_color[0], state.draw_color[1], state.draw_color[2], state.draw_color[3]);
+    glBlendFunc(state.blend_func[0], state.blend_func[1]);
+}

src/renderer/OpenGL/internals/internals.h

@@ -0,0 +1,86 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <array>
+#include <vector>
+#include <J3ML/LinearAlgebra/Vector2.hpp>
+#include <JGL/types/RenderTarget.h>
+#include <JGL/types/Light.h>
+#include <JGL/logger/logger.h>
+
+namespace JGL {
+    class State;
+    class StateStack;
+}
+
+class JGL::State {
+public:
+    GLfloat clear_color[4] = {0, 0, 0, 1};
+    GLfloat draw_color[4] = {1, 1, 1, 1};
+    GLint viewport[4] = {0, 0, 0, 0};
+    GLint blend_func[2];
+    GLuint current_fbo = 0;
+
+    bool texture_2D = false;
+    bool texture_coordinate_array = false;
+    bool normal_array = false;
+    bool depth_test = false;
+    bool vertex_array = false;
+    bool cull_face = false;
+    bool blend = false;
+    bool color_array = false;
+    GLint selected_texture_unit = 0;
+    // List of lights required for each object in the scene. up-to 8. For example, the sun. Or a flash-light.
+    std::array<const LightBase*, 8> required_lights{};
+    // List of all lights in the scene.
+    std::vector<const LightBase*> optional_lights{};
+public:
+    static State SaveState();
+    static void RestoreState(const State& state);
+};
+
+class JGL::StateStack {
+private:
+    std::vector<State> states{};
+public:
+    size_t Size() { return states.size(); }
+    void Push(const State& state);
+    void Pop();
+    State* PreviousState();
+public:
+    StateStack() = default;
+    ~StateStack() = default;
+};
+
+namespace JGL {
+    inline constexpr std::array<const LightBase*, 8> empty_light_array = { nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr };
+    std::vector<Vector3> TriangleMeshVertexNormals(const Vector3* vertices, const size_t& vertex_count, const unsigned int* indices, const size_t& index_count);
+    inline StateStack state_stack;
+    inline Vector2i window_size;
+    //inline State current_state;
+}
+
+namespace JGL::J2D {
+    inline State default_state
+    {
+            {0, 0, 0, 1},
+            {1, 1, 1, 1},
+            {0, 0, 0, 0},
+            {GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
+            0, false, false,
+            false, false, true, true,
+            true, false, 0,
+            {}, {}
+    };
+}
+
+namespace JGL::J3D {
+    inline State current_state;
+    inline float far_plane = 0;
+    inline float fov = 0;
+    // Enables lighting and selects the correct lights to use.
+    void SelectLights(const Vector3& position);
+    // Resets the GL lights to default and disables them. Then, disables lighting.
+    void ResetLights();
+    [[nodiscard]] bool UsingLighting();
+}

src/types/Font.cpp

@@ -4,6 +4,7 @@
 #include <iostream>
 #include <glad/glad.h>
 #include <JGL/logger/logger.h>
+#include <JGL/JGL.h>
 
 #if __linux__
     #include <freetype2/ft2build.h>
@@ -58,25 +59,38 @@ namespace JGL {
         return Detail::InitTextEngine();
     }
 
+    Font::Font(const unsigned char* data, const size_t& size) {
+        if (Detail::ft == nullptr)
+            throw std::runtime_error("Error::FREETYPE: FT_Library was not initialized before attempting to load a font!");
+
+        if (FT_New_Memory_Face(Detail::ft, data, size, 0, &face))
+            throw std::runtime_error("Error::FREETYPE: Failed to load font!");
+
+        unsigned int new_index = 0;
+        for (const auto& f : Detail::fonts)
+            if (f.index >= new_index)
+                new_index = f.index + 1;
+        index = new_index;
+
+        Detail::fonts.push_back(*this);
+        std::cout << "Loaded font from memory at " << static_cast<const void*>(data) << " with index " << new_index << std::endl;
+    }
+
     Font::Font(const std::filesystem::path& path) {
         if (Detail::ft == nullptr)
             throw std::runtime_error("Error::FREETYPE: FT_Library was not initialized before attempting to load a font!");
 
-        Font font;
-        if (FT_New_Face(Detail::ft, path.string().c_str(), 0, &face)) {
-            std::cout << "Error::FREETYPE: Failed to load font!" << std::endl;
+        if (FT_New_Face(Detail::ft, path.string().c_str(), 0, &face))
             throw std::runtime_error("Error::FREETYPE: Failed to load font!");
-            //return -1;
-        }
-        unsigned int newIndex = 0;
-        for (const auto& f : Detail::fonts)
-            if (f.index >= newIndex)
-                newIndex = f.index + 1;
 
-        index = newIndex;
-        Detail::fonts.push_back(font);
-        std::cout << "Loaded font from " << path << " with index " << newIndex << std::endl;
-        //return newIndex;
+        unsigned int new_index = 0;
+        for (const auto& f : Detail::fonts)
+            if (f.index >= new_index)
+                new_index = f.index + 1;
+
+        index = new_index;
+        Detail::fonts.push_back(*this);
+        std::cout << "Loaded font from " << path << " with index " << new_index << std::endl;
     }
 
     Font::~Font() {
@@ -119,14 +133,18 @@ 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);
+        jlog::Warning("Measuring a font size that is not cached, Defaulting to Jupiteroid.");
+        FT_Set_Pixel_Sizes(Fonts::Jupiteroid.face, ptSize, ptSize);
 
         for (const char& c : text) {
+            // TODO: Fix segfault
+            //FT_GlyphSlot slot = Fonts::Jupiteroid.face->glyph;
+            //auto glyph_index = FT_Get_Char_Index(Fonts::Jupiteroid.face, c);
             FT_GlyphSlot slot = face->glyph;
             auto glyph_index = FT_Get_Char_Index(this->face, c);
 
-            auto error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
+            //auto error = FT_Load_Glyph(Fonts::Jupiteroid.face, glyph_index, FT_LOAD_DEFAULT);
+            auto error = FT_Load_Glyph(this->face, glyph_index, FT_LOAD_DEFAULT);
 
             if (error)
                 continue;
@@ -146,9 +164,6 @@ namespace JGL {
             if (extents.y < ptSize)
                 extents.y = ptSize;
         }
-
         return extents;
     }
-
-
 }

src/types/Light.cpp

@@ -1,19 +1,64 @@
 #include <JGL/types/Light.h>
-#include <glad/glad.h>
 
-JGL::Light::Light(const Vector3& position, const Color4& ambient, const Color4& diffuse, const Color4& specular) {
+JGL::PointLight::PointLight(const Vector3& position, const Color4& ambient, const Color4& diffuse, const Color4& specular, float constant_attenuation, float linear_attenuation, float quadratic_attenuation) {
     this->position = Vector4(position, 1.0f);
     this->ambient = ambient;
     this->diffuse = diffuse;
     this->specular = specular;
+    this->constant_attenuation = constant_attenuation;
+    this->linear_attenuation = linear_attenuation;
+    this->quadratic_attenuation = quadratic_attenuation;
 }
 
-Vector3 JGL::Light::GetNormalizedSceenSpaceCoordinates() const {
-    GLint viewport[4];
-    glGetIntegerv(GL_VIEWPORT, viewport);
+float JGL::PointLight::GetAttenuationAtPosition(const Vector3& pos) const {
+    Vector3 light_pos = {position.x, position.y, position.z};
+    Vector3 vector_to_position = pos - light_pos;
+    float distance = vector_to_position.Length();
 
-    float normalized_x = 2.0f * (position.x - viewport[0]) / viewport[2] - 1.0f;
-    float normalized_y = 2.0f * (position.y - viewport[1]) / viewport[3] - 1.0f;
-
-    return {normalized_x, normalized_y, position.z};
+    return 1.0f / (GetConstantAttenuation() + GetLinearAttenuation() * distance + GetQuadraticAttenuation() * distance * distance);
 }
+
+JGL::SpotLight::SpotLight(const Vector3& position, const Matrix3x3& ro_mat, float cone_size_degrees, float exponent, const Color4& ambient, const Color4& diffuse, const Color4& specular,
+                          float constant_attenuation, float linear_attenuation, float quadratic_attenuation) {
+    this->position = Vector4(position, 1);
+    //TODO RotationMatrix to "Normalized direction vector."
+    orientation = ro_mat;
+    this->cut = cone_size_degrees;
+    this->exponent = exponent;
+    this->ambient = ambient;
+    this->diffuse = diffuse;
+    this->specular = specular;
+    this->constant_attenuation = constant_attenuation;
+    this->linear_attenuation = linear_attenuation;
+    this->quadratic_attenuation = quadratic_attenuation;
+}
+
+Vector4 JGL::LightBase::GetPosition() const {
+    return position;
+}
+
+Color4 JGL::LightBase::GetAmbient() const {
+    return ambient;
+}
+
+Color4 JGL::LightBase::GetDiffuse() const {
+    return diffuse;
+}
+
+Color4 JGL::LightBase::GetSpecular() const {
+    return specular;
+}
+
+float JGL::LightBase::GetConstantAttenuation() const {
+    return constant_attenuation;
+}
+
+float JGL::LightBase::GetLinearAttenuation() const {
+    return linear_attenuation;
+}
+
+float JGL::LightBase::GetQuadraticAttenuation() const {
+    return quadratic_attenuation;
+}
+
+

src/types/Material.cpp

@@ -0,0 +1,31 @@
+#include <JGL/types/Material.h>
+#include <J3ML/LinearAlgebra/Vector4.hpp>
+
+JGL::Material::Material(const Color4& ambient_reflection, const Color4& diffuse_reflection, const Color4& specular_reflection, const Color4& light_emission, float& shine) {
+    ambient_ref = ambient_reflection;
+    diffuse_ref = diffuse_reflection;
+    specular_ref = specular_reflection;
+    emission = light_emission;
+    shininess = shine;
+}
+
+void JGL::Material::SetActiveMaterial(const Material& material) {
+    Vector4 ambient = { material.ambient_ref.RN(), material.ambient_ref.BN(), material.ambient_ref.GN(), material.ambient_ref.AN() };
+    Vector4 diffuse = { material.diffuse_ref.RN(), material.diffuse_ref.BN(), material.diffuse_ref.GN(), material.diffuse_ref.AN() };
+    Vector4 specular = { material.specular_ref.RN(), material.specular_ref.BN(), material.specular_ref.GN(), material.specular_ref.AN() };
+    Vector4 emission = { material.emission.RN(), material.emission.BN(), material.emission.GN(), material.emission.AN() };
+
+    // Determine which faces we're going to apply this material to.
+    GLenum face = GL_FRONT;
+    if (glIsEnabled(GL_CULL_FACE)) {
+        GLint current; glGetIntegerv(GL_CULL_FACE_MODE, &current);
+        if (current == GL_FRONT)
+            face = GL_BACK;
+    }
+
+    glMaterialfv(face, GL_AMBIENT, ambient.ptr());
+    glMaterialfv(face, GL_DIFFUSE, diffuse.ptr());
+    glMaterialfv(face, GL_SPECULAR, specular.ptr());
+    glMaterialfv(face, GL_EMISSION, emission.ptr());
+    glMaterialf(face, GL_SHININESS, material.shininess);
+}

src/types/RenderTarget.cpp

@@ -3,12 +3,12 @@
 #include <JGL/logger/logger.h>
 #include <stdexcept>
 
-const JGL::Texture* JGL::RenderTarget::GetJGLTexture() const {
+const JGL::Texture* JGL::RenderTarget::GetTexture() const {
     return texture;
 }
 
-GLuint JGL::RenderTarget::GetGLTextureHandle() const {
-    return texture->GetGLTextureHandle();
+GLuint JGL::RenderTarget::GetTextureHandle() const {
+    return texture->GetHandle();
 }
 
 GLuint JGL::RenderTarget::GetGLFramebufferObjectHandle() const {
@@ -30,7 +30,7 @@ void JGL::RenderTarget::SetActiveGLRenderTarget(const RenderTarget& render_targe
     glViewport(0,0, render_target.GetDimensions().x, render_target.GetDimensions().y);
 }
 
-Vector2 JGL::RenderTarget::GetDimensions() const {
+Vector2i JGL::RenderTarget::GetDimensions() const {
     return size;
 }
 
@@ -56,6 +56,7 @@ JGL::RenderTarget::RenderTarget(const JGL::Texture* texture, const Color4& clear
     if (texture->GetDimensions().x < 1 || texture->GetDimensions().y < 1)
         Logger::Fatal("Creating a render target where the color attachment is empty?");
 
+    this->size = { static_cast<int>(texture->GetDimensions().x), static_cast<int>(texture->GetDimensions().y) };
     GLuint current_fbo = GetActiveGLFramebufferHandle();
     GLint viewport[4] = {0, 0, 0, 0};
     glGetIntegerv(GL_VIEWPORT, viewport);
@@ -63,7 +64,7 @@ JGL::RenderTarget::RenderTarget(const JGL::Texture* texture, const Color4& clear
     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);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->GetHandle(), 0);
 
     if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
         throw std::runtime_error("A new framebuffer could not be allocated.");
@@ -71,12 +72,11 @@ JGL::RenderTarget::RenderTarget(const JGL::Texture* texture, const Color4& clear
     glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
     glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
     this->clear_color = clear_color;
-    this->size = texture->GetDimensions();
     this->texture = texture;
     texture_created_by_us = false;
 }
 
-JGL::RenderTarget::RenderTarget(const Vector2& size, const Color4& clear_color, bool use_depth, MSAA_SAMPLE_RATE sample_rate) {
+JGL::RenderTarget::RenderTarget(const Vector2i& size, const Color4& clear_color, bool use_depth, MSAA_SAMPLE_RATE sample_rate) {
     if (size.x < 1 || size.y < 1)
         Logger::Fatal("Creating a render target where the color attachment is empty?");
 
@@ -84,22 +84,18 @@ JGL::RenderTarget::RenderTarget(const Vector2& size, const Color4& clear_color,
     GLint viewport[4] = {0, 0, 0, 0};
     glGetIntegerv(GL_VIEWPORT, viewport);
     //Textures behave strangely if they're not square aaaaaaaaaaaaa.
-    unsigned int biggest;
-    if (size.x >= size.y)
-        biggest = size.x;
-    else biggest = size.y;
 
-    texture = new Texture(Vector2(biggest, biggest));
+    texture = new Texture(size);
     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);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->GetHandle(), 0);
 
     if (use_depth) {
         GLuint depthBuffer;
         glGenRenderbuffers(1, &depthBuffer);
         glBindRenderbuffer(GL_RENDERBUFFER, depthBuffer);
-        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, biggest, biggest);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, size.x, size.y);
         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthBuffer);
         glClear(GL_DEPTH_BUFFER_BIT);
         using_depth = true;
@@ -124,7 +120,7 @@ JGL::RenderTarget::RenderTarget(const Vector2& size, const Color4& clear_color,
         SetMSAAEnabled(sample_rate);
 }
 
-std::vector<GLfloat> JGL::RenderTarget::GetData() const {
+std::vector<GLfloat> JGL::RenderTarget::GetPixels() const {
     std::vector<GLfloat> data(GetDimensions().x * GetDimensions().y * 4);
     GLuint current_fbo = GetActiveGLFramebufferHandle();
 
@@ -132,12 +128,11 @@ std::vector<GLfloat> JGL::RenderTarget::GetData() const {
     glReadPixels(0, 0, GetDimensions().x, GetDimensions().y, GL_RGBA, GL_FLOAT, data.data());
     glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
     return data;
-
 }
 
-void JGL::RenderTarget::Resize(const Vector2& new_size) {
+void JGL::RenderTarget::Resize(const Vector2i& new_size) {
     if (!texture_created_by_us)
-        Logger::Fatal("Resizing a texture that already existed?");
+        Logger::Error("Resizing a Render Target that does not own it's texture?");
 
     GLuint current_fbo = GetActiveGLFramebufferHandle();
     GLfloat old_clear_color[4];
@@ -145,45 +140,19 @@ void JGL::RenderTarget::Resize(const Vector2& new_size) {
     glGetIntegerv(GL_VIEWPORT, old_viewport);
     glGetFloatv(GL_COLOR_CLEAR_VALUE, old_clear_color);
 
-    /* If what was previously not part of the renderable area is big enough to
-     * just set the new size without reading data back */
-    if (new_size.x <= texture->GetDimensions().x && new_size.y <= texture->GetDimensions().y) {
-        size = new_size;
-
-        // Clear.
-        glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_object);
-        auto cc = GetClearColor();
-        glClearColor(cc.RedChannelNormalized(), cc.GreenChannelNormalized(), cc.BlueChannelNormalized(), cc.AlphaChannelNormalized());
-        glViewport(0,0, size.x, size.y);
-        glClear(GL_COLOR_BUFFER_BIT);
-        if (using_depth)
-            glClear(GL_DEPTH_BUFFER_BIT);
-
-        glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
-        glClearColor(old_clear_color[0], old_clear_color[1], old_clear_color[2], old_clear_color[3]);
-        glViewport(old_viewport[0], old_viewport[1], old_viewport[2], old_viewport[3]);
-        return;
-    }
-
     //If we have to remake the texture.
     glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_object);
-
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
+
     // Erase it.
     delete texture;
 
-    unsigned int biggest;
-    if (new_size.x >= new_size.y)
-        biggest = new_size.x;
-    else
-        biggest = new_size.y;
-
     auto cc = GetClearColor();
     glClearColor(cc.RedChannelNormalized(), cc.GreenChannelNormalized(), cc.BlueChannelNormalized(), cc.AlphaChannelNormalized());
     glViewport(0,0, size.x, size.y);
 
-    texture = new Texture(Vector2((float) biggest, (float) biggest));
-    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->GetGLTextureHandle(), 0);
+    texture = new Texture(new_size);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->GetHandle(), 0);
 
     glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
     glClearColor(old_clear_color[0], old_clear_color[1], old_clear_color[2], old_clear_color[3]);
@@ -204,7 +173,7 @@ JGL::RenderTarget::~RenderTarget() {
         delete texture;
 }
 
-bool JGL::RenderTarget::TextureCreatedByRenderTarget() const {
+bool JGL::RenderTarget::OwnsTexture() const {
     return texture_created_by_us;
 }
 
@@ -216,19 +185,20 @@ bool JGL::RenderTarget::MSAAEnabled() const {
     return msaa_sample_rate != MSAA_SAMPLE_RATE::MSAA_NONE;
 }
 
-void JGL::RenderTarget::SetMSAAEnabled(JGL::MSAA_SAMPLE_RATE sample_rate) {
+bool JGL::RenderTarget::SetMSAAEnabled(JGL::MSAA_SAMPLE_RATE sample_rate) {
     // If we'd be setting the same sample_rate we already have.
     if (sample_rate == msaa_sample_rate)
-        return;
+        return false;
 
     // If we'd be rendering onto a texture and not a plain render target we don't want this.
-    if (!TextureCreatedByRenderTarget())
-        return;
+    if (!OwnsTexture())
+        return false;
 
     // Remove it if they request no msaa or if what they requested is different than what they already have.
     if (sample_rate == MSAA_SAMPLE_RATE::MSAA_NONE || msaa_sample_rate != MSAA_SAMPLE_RATE::MSAA_NONE) {
         if(using_depth)
             glDeleteRenderbuffers(1, &msaa_depth_buffer);
+
         glDeleteRenderbuffers(1, &msaa_render_buffer);
         glDeleteFramebuffers(1, &msaa_framebuffer_object);
 
@@ -239,7 +209,7 @@ void JGL::RenderTarget::SetMSAAEnabled(JGL::MSAA_SAMPLE_RATE sample_rate) {
 
         // Only return here if they specifically requested no MSAA. else continue to change mode.
         if (sample_rate == MSAA_SAMPLE_RATE::MSAA_NONE)
-            return;
+            return true;
     }
 
     GLuint current_fbo = GetActiveGLFramebufferHandle();
@@ -271,11 +241,11 @@ void JGL::RenderTarget::SetMSAAEnabled(JGL::MSAA_SAMPLE_RATE sample_rate) {
 
     if (failure)
         SetMSAAEnabled(MSAA_SAMPLE_RATE::MSAA_NONE);
+    return failure;
 }
 
-void JGL::RenderTarget::Blit() const {
-    if (MSAAEnabled() && TextureCreatedByRenderTarget()) {
-
+void JGL::RenderTarget::MSAABlit() const {
+    if (MSAAEnabled() && OwnsTexture()) {
         // Save the GL state.
         GLuint current_fbo = GetActiveGLFramebufferHandle();
         GLint current_draw_fbo = 0;
@@ -295,23 +265,22 @@ void JGL::RenderTarget::Blit() const {
     }
 
     // Fixes using render targets on a texture that has mipmaps.
-    if (GetJGLTexture()->GetFilteringMode() == TextureFilteringMode::MIPMAP_NEAREST
-        || GetJGLTexture()->GetFilteringMode() == TextureFilteringMode::MIPMAP_BILINEAR ||
-        GetJGLTexture()->GetFilteringMode() == TextureFilteringMode::MIPMAP_TRILINEAR) {
+    if (GetTexture()->GetFilteringMode() == FilteringMode::MIPMAP_NEAREST
+        || GetTexture()->GetFilteringMode() == FilteringMode::MIPMAP_BILINEAR ||
+        GetTexture()->GetFilteringMode() == FilteringMode::MIPMAP_TRILINEAR) {
         GLint current_texture = 0;
         glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
 
-        glBindTexture(GL_TEXTURE_2D, GetJGLTexture()->GetGLTextureHandle());
+        glBindTexture(GL_TEXTURE_2D, GetTexture()->GetHandle());
         glGenerateMipmap(GL_TEXTURE_2D);
 
         glBindTexture(GL_TEXTURE_2D, current_texture);
     }
 }
 
-void JGL::RenderTarget::Blit(const JGL::RenderTarget& source, JGL::RenderTarget* destination) {
-    //TODO allow blitting onto an FBO that is bigger but not smaller.
-    if (source.size != destination->size)
-        Logger::Warning("Blitting a render target but they're not the same size?");
+void JGL::RenderTarget::Blit(const JGL::RenderTarget& source, JGL::RenderTarget* destination, const Vector2i& position) {
+    if (source.GetDimensions().x > destination->GetDimensions().x || source.GetDimensions().y > destination->GetDimensions().y)
+        Logger::Warning("Blitting a Render Target onto another Render Target but the destination Render Target is too small?");
 
     // Save the GL state.
     GLuint current_fbo = GetActiveGLFramebufferHandle();
@@ -323,7 +292,7 @@ void JGL::RenderTarget::Blit(const JGL::RenderTarget& source, JGL::RenderTarget*
     // Draw the contents of one into the other.
     glBindFramebuffer(GL_READ_FRAMEBUFFER, source.framebuffer_object);
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, destination->framebuffer_object);
-    glBlitFramebuffer(0, 0, source.size.x, source.size.y, 0, 0, source.size.x, source.size.y, GL_COLOR_BUFFER_BIT, GL_NEAREST);
+    glBlitFramebuffer(0, 0, source.size.x, source.size.y, position.x, position.y, position.x + source.size.x, position.y + source.size.y, GL_COLOR_BUFFER_BIT, GL_NEAREST);
 
     // Put the GL state back.
     glBindFramebuffer(GL_READ_FRAMEBUFFER, current_read_fbo);
@@ -331,12 +300,20 @@ void JGL::RenderTarget::Blit(const JGL::RenderTarget& source, JGL::RenderTarget*
     glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
 }
 
-void JGL::RenderTarget::Blit(const Color4& color, const Vector2& position, JGL::RenderTarget* destination) {
+void JGL::RenderTarget::Blit(const Texture* source, RenderTarget* destination, const Vector2i& position) {
+    auto temp = new RenderTarget(source);
+    Blit(*temp, destination);
+    delete temp;
+}
+
+// To avoid repeatedly allocating and deallocating.
+JGL::RenderTarget* pixel = nullptr;
+void JGL::RenderTarget::Blit(const Color4& color, const Vector2i& position, JGL::RenderTarget* destination) {
     if (position.x > destination->size.x || position.y > destination->size.y)
         Logger::Warning("Blitting outside of the renderable area of the destination.");
 
-    Texture texture(Vector2(1,1));
-    RenderTarget source(&texture,color);
+    if (pixel == nullptr)
+        pixel = new RenderTarget({1,1});
 
     GLint current_draw_fbo = 0;
     GLint current_read_fbo = 0;
@@ -348,13 +325,14 @@ void JGL::RenderTarget::Blit(const Color4& color, const Vector2& position, JGL::
     glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &current_read_fbo);
     glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &current_draw_fbo);
 
-    SetActiveGLRenderTarget(source);
+    SetActiveGLRenderTarget(*pixel);
     glClearColor(color.RedChannelNormalized(), color.GreenChannelNormalized(), color.BlueChannelNormalized(), color.AlphaChannelNormalized());
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glClear(GL_COLOR_BUFFER_BIT);
 
     // Invert so it's relative to the top left corner.
     int target_y = destination->size.y - position.y - 1;
-    glBindFramebuffer(GL_READ_FRAMEBUFFER, source.framebuffer_object);
+
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, pixel->framebuffer_object);
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, destination->framebuffer_object);
     glBlitFramebuffer(0, 0, 1, 1, position.x, target_y, position.x + 1, target_y + 1, GL_COLOR_BUFFER_BIT, GL_NEAREST);
 
@@ -383,3 +361,7 @@ JGL::RenderTarget::RenderTarget(const JGL::RenderTarget& rhs) {
 
     operator delete(this_render_target);
 }
+
+Vector2i JGL::RenderTarget::MaximumSize() {
+    return Texture::MaximumSize();
+}

src/types/Texture.cpp

@@ -1,192 +1,292 @@
 #include <JGL/types/Texture.h>
-#include <iostream>
 #include <JGL/types/RenderTarget.h>
+#include <JGL/logger/logger.h>
+#include <glad/glad.h>
+#include <fstream>
 
-using namespace ReImage;
+#define STB_IMAGE_IMPLEMENTATION
+#include "internals/stb_image.h"
 
-namespace JGL
-{
-    Texture::Texture(const std::string& file, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode, const TextureFlag& flags)
-    {
-        auto* t = new ReImage::Image(file, flags);
-        GLuint previous_texture;
-        glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
+using namespace JGL;
 
-        load(t, {(float) t->getWidth(), (float) t->getHeight()}, t->getTextureFormat(), filtering_mode, wrapping_mode);
-        texture_flags = flags;
+Texture::Texture(const std::filesystem::path& file, FilteringMode filtering_mode, WrappingMode wrapping_mode, bool invert_y) :
+invert_y(invert_y), filtering_mode(filtering_mode), wrapping_mode(wrapping_mode) {
+    std::vector<unsigned char> pixels{};
 
-        delete t;
+    std::ifstream ifStream(file, std::ios::in | std::ios::binary);
+    if (!ifStream.is_open())
+        Logger::Fatal("Trying to load a texture from: " + file.string() + "but we couldn't read the file.");
+
+    unsigned char bmpFileHeader[14];
+
+    ifStream.read(reinterpret_cast<char*>(bmpFileHeader), 14);
+    if (bmpFileHeader[0] == 'B' && bmpFileHeader[1] == 'M')
+        pixels = bmp(file);
+
+    //TODO determine if it's a PNG using the file header instead.
+    else if (file.string().ends_with(".png"))
+        pixels = png(file);
+    ifStream.close();
+
+
+    if (invert_y) {
+        unsigned int row_size = size.x * 4;;
+        if (format == ColorFormat::RGB)
+            row_size = size.x * 3;
+
+        std::vector<unsigned char> temp(row_size);
+        for (unsigned int y = 0; y < size.y / 2; ++y) {
+            unsigned char *topRow = &pixels[y * row_size];
+            unsigned char *bottomRow = &pixels[(size.y - y - 1) * row_size];
+            std::copy(bottomRow, bottomRow + row_size, temp.begin());
+            std::copy(topRow, topRow + row_size, bottomRow);
+            std::copy(temp.begin(), temp.end(), topRow);
+        }
     }
 
-    Texture::Texture(const Vector2& size) {
-        GLuint previous_texture;
-        glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
+    load(pixels.data());
+}
 
-        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);
+std::vector<unsigned char> Texture::png(const std::filesystem::path& file) {
+    std::vector<unsigned char> result{};
+    int channels;
+
+    unsigned char* image_data = stbi_load(file.c_str(), &size.x, &size.y, &channels, 0);
+    if (!image_data)
+        Logger::Fatal("Trying to load a texture from: " + file.string() + "but we couldn't read the file.");
+
+    if (channels == 4)
+        format = ColorFormat::RGBA;
+    else if (channels == 3)
+        format = ColorFormat::RGB;
+
+    if (image_data)
+        result.assign(image_data, image_data + size.x * size.y * channels);
+
+    stbi_image_free(image_data);
+    return result;
+}
+
+std::vector<unsigned char> Texture::bmp(const std::filesystem::path& file) {
+    std::vector<unsigned char> result{};
+    std::ifstream bmp_file(file, std::ios::in | std::ios::binary);
+
+    unsigned char bmpFileHeader[14];
+    unsigned char bmpInfoHeader[40];
+
+    bmp_file.read(reinterpret_cast<char *>(bmpFileHeader), 14);
+    bmp_file.read(reinterpret_cast<char *>(bmpInfoHeader), 40);
+
+    size.x = bmpInfoHeader[4] + (bmpInfoHeader[5] << 8) + (bmpInfoHeader[6] << 16) + (bmpInfoHeader[7] << 24);
+    size.y = bmpInfoHeader[8] + (bmpInfoHeader[9] << 8) + (bmpInfoHeader[10] << 16) + (bmpInfoHeader[11] << 24);
+
+    int row_padded = (size.x * 3 + 3) & (~3);
+    result.resize(size.x * size.y * 3);
+
+    std::vector<unsigned char> rowData(row_padded);
+    for (int y = size.y - 1; y >= 0; --y) {
+        bmp_file.read(reinterpret_cast<char *>(rowData.data()), row_padded);
+        for (int x = 0; x < size.x; ++x) {
+            result[(y * size.x + x) * 3 + 2] = rowData[x * 3 + 0];
+            result[(y * size.x + x) * 3 + 1] = rowData[x * 3 + 1];
+            result[(y * size.x + x) * 3 + 0] = rowData[x * 3 + 2];
+        }
+    }
+
+    bmp_file.close();
+    format = ColorFormat::RGB;
+    return result;
+}
+
+Texture::Texture(const Vector2i& size) : invert_y(true), format(ColorFormat::RGBA), size(size), filtering_mode(FilteringMode::NEAREST), wrapping_mode(WrappingMode::CLAMP_TO_EDGE) {
+    if (SizeExceedsMaximum(size))
+        Logger::Error("Creating a texture where the size is bigger than the maximum for this system.");
+    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, size.x, size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+    glBindTexture(GL_TEXTURE_2D, previous_texture);
+}
+
+void Texture::load(const unsigned char* pixels) {
+    if (SizeExceedsMaximum(size))
+        Logger::Error("Creating a texture where the size is bigger than the maximum for this system.");
+
+    GLuint previous_texture;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
+
+    glGenTextures(1, &texture_handle);
+    glBindTexture(GL_TEXTURE_2D, texture_handle);
+
+    if (format == ColorFormat::RGBA)
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.x, size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+
+    else if (format == ColorFormat::RGB)
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, size.x, size.y, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
+
+    if (wrapping_mode == WrappingMode::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);
 
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (int) size.x, (int) size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+    else if (wrapping_mode == WrappingMode::REPEAT)
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT),
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 
-        texture_format = TextureFormat::RGBA;
-        texture_size = size;
-        texture_filtering_mode = TextureFilteringMode::NEAREST;
-        texture_wrapping_mode = TextureWrappingMode::CLAMP_TO_EDGE;
-        // Because in vram it'll be right side up.
-        texture_flags = TextureFlag::INVERT_Y;
+    else if (wrapping_mode == WrappingMode::MIRRORED_REPEAT)
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT),
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
 
-        glBindTexture(GL_TEXTURE_2D, previous_texture);
+    else if (wrapping_mode == WrappingMode::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);
 
+    if (filtering_mode == FilteringMode::NEAREST)
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST),
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+    else if (filtering_mode == FilteringMode::BILINEAR)
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR),
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    else if (filtering_mode == FilteringMode::MIPMAP_NEAREST ||
+            filtering_mode == FilteringMode::MIPMAP_BILINEAR ||
+            filtering_mode == FilteringMode::MIPMAP_TRILINEAR) {
+
+        glGenerateMipmap(GL_TEXTURE_2D);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+
+        if (filtering_mode == FilteringMode::MIPMAP_NEAREST)
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST),
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+        else if (filtering_mode == FilteringMode::MIPMAP_BILINEAR)
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST),
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        else if (filtering_mode == FilteringMode::MIPMAP_TRILINEAR)
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR),
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     }
+    glBindTexture(GL_TEXTURE_2D, previous_texture);
+}
 
-    void Texture::load(Image* software_texture, const Vector2& size, const TextureFormat& format,
-                           TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode) {
+std::vector<Color4> JGL::Texture::GetPixelData() const {
+    GLint current_texture;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
 
-        GLuint previous_texture;
-        glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*) &previous_texture);
-
-            glGenTextures(1, &texture_handle);
-            glBindTexture(GL_TEXTURE_2D, texture_handle);
-
-            if (format == TextureFormat::RGBA)
-                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (int) size.x, (int) size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE,
-                             software_texture->pixel_data.data());
-
-            else if (format == TextureFormat::RGB)
-                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, (int) size.x, (int) size.y, 0, GL_RGB, GL_UNSIGNED_BYTE,
-                             software_texture->pixel_data.data());
-
-            if (wrapping_mode == 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 (wrapping_mode == TextureWrappingMode::REPEAT)
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT),
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-
-            else if (wrapping_mode == TextureWrappingMode::MIRRORED_REPEAT)
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT),
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
-
-            else if (wrapping_mode == 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);
-            if (filtering_mode == TextureFilteringMode::NEAREST)
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST),
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-
-            else if (filtering_mode == TextureFilteringMode::BILINEAR)
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR),
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
-            else if (filtering_mode == TextureFilteringMode::MIPMAP_NEAREST ||
-                     filtering_mode == TextureFilteringMode::MIPMAP_BILINEAR ||
-                     filtering_mode == TextureFilteringMode::MIPMAP_TRILINEAR) {
-
-                glGenerateMipmap(GL_TEXTURE_2D);
-                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
-
-                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);
-
-                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);
-
-                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);
-            }
-            texture_size = size;
-            texture_format = format;
-            texture_filtering_mode = filtering_mode;
-            glBindTexture(GL_TEXTURE_2D, previous_texture);
-    }
-
-    std::vector<Color4> JGL::Texture::GetPixelData() const {
-        GLint current_texture;
-        glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
-
-        std::vector<Color4> result((size_t) (texture_size.x * texture_size.y));
-        glBindTexture(GL_TEXTURE_2D, texture_handle);
-
-        if (texture_format == TextureFormat::RGBA) {
-            glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, result.data());
-            glBindTexture(GL_TEXTURE_2D, current_texture);
-            return result;
-        }
-
-        //if RGB
-        std::vector<Color3> color3((size_t) (texture_size.x * texture_size.y));
-        glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, color3.data());
-        for (const auto &c: color3)
-            result.emplace_back(c);
+    std::vector<Color4> result((size_t) (size.x * size.y));
+    glBindTexture(GL_TEXTURE_2D, texture_handle);
 
+    if (format == ColorFormat::RGBA) {
+        glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, result.data());
         glBindTexture(GL_TEXTURE_2D, current_texture);
         return result;
     }
 
-    void Texture::Erase() {
-        if (texture_handle != 0)
-            glDeleteTextures(1, &texture_handle);
-        texture_handle = 0;
+    //if RGB
+    std::vector<Color3> color3((size_t) (size.x * size.y));
+    glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, color3.data());
+    for (const auto &c: color3)
+        result.emplace_back(c);
+
+    glBindTexture(GL_TEXTURE_2D, current_texture);
+    return result;
+}
+
+GLuint Texture::GetHandle() const {
+    return texture_handle;
+}
+
+Vector2i Texture::GetDimensions() const {
+    return size;
+}
+
+bool Texture::Inverted() const {
+    return invert_y;
+}
+
+ColorFormat Texture::GetFormat() const {
+    return format;
+}
+
+FilteringMode Texture::GetFilteringMode() const {
+    return filtering_mode;
+}
+
+WrappingMode Texture::GetWrappingMode() const {
+    return wrapping_mode;
+}
+
+Texture::Texture(const Color4* pixels, const Vector2i& size, const ColorFormat& format, FilteringMode filtering_mode, WrappingMode wrapping_mode) :
+ size(size), format(format), filtering_mode(filtering_mode), wrapping_mode(wrapping_mode) {
+    load((unsigned char*) pixels);
+}
+
+Texture::Texture(const Color3* pixels, const Vector2i& size, const ColorFormat& format, FilteringMode filtering_mode, WrappingMode wrapping_mode) :
+size(size), format(format), filtering_mode(filtering_mode), wrapping_mode(wrapping_mode) {
+    load((unsigned char*) pixels);
+}
+
+Texture::~Texture() {
+    if (texture_handle != 0)
+        glDeleteTextures(1, &texture_handle);
+    texture_handle = 0;
+}
+
+Texture::Texture(const Texture& rhs) {
+    auto* this_texture = new Texture(rhs.GetDimensions());
+    auto this_render_target = RenderTarget(this_texture);
+    auto rhs_render_target = RenderTarget(&rhs);
+
+    RenderTarget::Blit(rhs_render_target, &this_render_target);
+
+    this->texture_handle = this_texture->texture_handle;
+    this->size = this_texture->size;
+    this->invert_y = this_texture->invert_y;
+    this->format = this_texture->format;
+    this->filtering_mode = this_texture->filtering_mode;
+    this->wrapping_mode = this_texture->wrapping_mode;
+    operator delete(this_texture);
+}
+
+Texture::Texture(const Texture* textures, const size_t& texture_count) {
+    int length = 0;
+    int biggest_y = 0;
+
+    for (int i = 0; i < texture_count; i++) {
+        if (biggest_y < textures[i].size.y)
+            biggest_y = textures[i].size.y;
+        length += textures[i].size.x;
     }
 
-    GLuint Texture::GetGLTextureHandle() const {
-        return texture_handle;
+    auto* result = new Texture(Vector2i(length, biggest_y));
+    auto render_target = RenderTarget(result);
+
+    int next_x = 0;
+    for (int i = 0; i < texture_count; i++) {
+        RenderTarget::Blit(&textures[i], &render_target, Vector2i(next_x, 0));
+        next_x += textures[i].GetDimensions().x;
     }
+}
 
-    Vector2 Texture::GetDimensions() const {
-        return texture_size;
-    }
+bool Texture::SizeExceedsMaximum(const Vector2i& s) {
 
-    TextureFlag Texture::GetFlags() const {
-        return texture_flags;
-    }
+    auto max_size = Texture::MaximumSize();
+    return s.x > max_size.x || s.y > max_size.y;
+}
 
-    TextureFormat Texture::GetFormat() const {
-        return texture_format;
-    }
+Vector2i Texture::MaximumSize() {
+    GLint max_size;
+    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
 
-    TextureFilteringMode Texture::GetFilteringMode() const {
-        return texture_filtering_mode;
-    }
-
-    TextureWrappingMode Texture::GetWrappingMode() const {
-        return texture_wrapping_mode;
-    }
-
-    Texture::Texture(Image* software_texture, const Vector2& size, const TextureFormat& format,
-                     TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode) {
-        load(software_texture, size, format, filtering_mode, wrapping_mode);
-    }
-
-    Texture::~Texture() {
-        Erase();
-    }
-
-    Texture::Texture(const Texture& rhs) {
-        auto* this_texture = new Texture(rhs.GetDimensions());
-        auto this_render_target = RenderTarget(this);
-        auto rhs_render_target = RenderTarget(&rhs);
-
-        RenderTarget::Blit(rhs_render_target, &this_render_target);
-
-        this->texture_handle = this_texture->texture_handle;
-        this->texture_size = this_texture->texture_size;
-        this->texture_flags = this_texture->texture_flags;
-        this->texture_format = this_texture->texture_format;
-        this->texture_filtering_mode = this_texture->texture_filtering_mode;
-        this->texture_wrapping_mode = this_texture->texture_wrapping_mode;
-
-        // Free the memory of "this_texture" without calling the destructor.
-        // In 99% of cases you wouldn't want this. But in this scenario we do.
-        operator delete(this_texture);
-    }
-}
+    return { max_size, max_size };
+}

src/types/VRamList.cpp

@@ -170,6 +170,10 @@ std::vector<GLfloat> JGL::VRamList::GetDataF() const {
     if (element_array_buffer)
         JGL::Logger::Warning("Getting data as GLfloat but the buffer data is GLuint?");
 
+    bool vertex_array_enabled = glIsEnabled(GL_VERTEX_ARRAY);
+    if (!vertex_array_enabled)
+        glEnableClientState(GL_VERTEX_ARRAY);
+
     GLint current_buffer = 0;
     glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_buffer);
     glBindBuffer(GL_ARRAY_BUFFER, list_handle);
@@ -184,6 +188,8 @@ std::vector<GLfloat> JGL::VRamList::GetDataF() const {
     glUnmapBuffer(GL_ARRAY_BUFFER);
     glBindBuffer(GL_ARRAY_BUFFER, current_buffer);
 
+    if (!vertex_array_enabled)
+        glDisableClientState(GL_VERTEX_ARRAY);
     return data;
 }
 
@@ -289,7 +295,6 @@ JGL::VRamList::VRamList(const JGL::VRamList& rhs) {
     if (rhs.element_array_buffer) {
         auto data_array = rhs.GetDataUI();
         this->load(data_array.data(), data_array.size());
-        return;
     }
 
     auto data_array = rhs.GetDataF();

src/types/VertexArray.cpp

@@ -1,20 +1,21 @@
 #include <JGL/types/VertexArray.h>
+#include <JGL/logger/logger.h>
 
 using namespace JGL;
 
-VRamList VertexArray::GetVertices() const {
+const VRamList* VertexArray::GetVertices() const {
     return vertices;
 }
 
-VRamList VertexArray::GetIndices() const {
+const VRamList* VertexArray::GetIndices() const {
     return indices;
 }
 
-JGL::VRamList VertexArray::GetNormals() const {
+const VRamList* VertexArray::GetNormals() const {
     return normals;
 }
 
-VRamList VertexArray::GetTextureCoordinates() const {
+const VRamList* VertexArray::GetTextureCoordinates() const {
     return texture_coordinates;
 }
 
@@ -144,46 +145,33 @@ VertexArray::VertexArray(const Vector3* vertex_positions, const long& vp_length,
                          const Normal* vertex_normals, const long& vn_length, const TextureCoordinate* texture_coordinates, const long& vt_length) {
 
     // TODO decimator. This is a total waste of memory as it sits.
-    vertices = VRamList(vertex_positions, vp_length);
+    this->vertices = new VRamList(vertex_positions, vp_length);
+
+    local_vertices.resize(vp_length);
+    memcpy(local_vertices.data(), vertex_positions, sizeof(Vector3) * vp_length);
+
     if (vertex_indices && vi_length) {
-        indices = VRamList(vertex_indices, vi_length);
+        indices = new VRamList(vertex_indices, vi_length);
         local_indices.resize(vi_length);
         memcpy(local_indices.data(), vertex_indices, sizeof(unsigned int) * vi_length);
     }
 
     if (vertex_normals && vn_length) {
-        normals = VRamList(vertex_normals, vn_length);
+        normals = new VRamList(vertex_normals, vn_length);
         local_normals.resize(vn_length);
         memcpy(local_normals.data(), vertex_indices, sizeof(Normal) * vn_length);
     }
 
     if (texture_coordinates && vt_length) {
-        this->texture_coordinates = VRamList(texture_coordinates, vt_length);
-        local_normals.resize(vt_length);
+        this->texture_coordinates = new VRamList(texture_coordinates, vt_length);
+        local_texture_coordinates.resize(vt_length);
         memcpy(local_texture_coordinates.data(), texture_coordinates, sizeof(TextureCoordinate) * vt_length);
     }
 
 }
 
-VertexArray::VertexArray(const std::vector<Vertex>& vertex_positions, const std::vector<unsigned int>& vertex_indices,
-                         const std::vector<Normal>& vertex_normals, const std::vector<TextureCoordinate>& texture_coordinates) {
-    vertices = VRamList(vertex_positions.data(), vertex_positions.size());
-    local_vertices = vertex_positions;
-
-    if (!vertex_indices.empty()) {
-        indices = VRamList(vertex_indices.data(), vertex_indices.size());
-        local_indices = vertex_indices;
-    }
-
-    if (!vertex_normals.empty()) {
-        normals = VRamList(vertex_normals.data(), vertex_normals.size());
-        local_normals = vertex_normals;
-    }
-
-    if (!texture_coordinates.empty()){
-        this->texture_coordinates = VRamList(texture_coordinates.data(), texture_coordinates.size());
-        local_texture_coordinates = texture_coordinates;
-    }
+VertexArray::VertexArray(const std::vector<Vertex>& vertex_positions, const std::vector<unsigned int>& vertex_indices, const std::vector<Normal>& vertex_normals, const std::vector<TextureCoordinate>& texture_coordinates) {
+    *this = VertexArray(vertex_positions.data(), vertex_positions.size(), vertex_indices.data(), vertex_indices.size(), vertex_normals.data(), vertex_normals.size(), texture_coordinates.data(), texture_coordinates.size());
 }
 
 bool VertexArray::Static() {

src/types/model/WavefrontOBJ.cpp

@@ -0,0 +1,334 @@
+#include <JGL/types/VertexArray.h>
+#include <JGL/logger/logger.h>
+
+std::pair<float, unsigned long> ParseNumber(const std::string& file_text, const unsigned long& offset) {
+    std::string number;
+    unsigned long new_offset = offset;
+    bool decimal_used = false;
+
+    if (offset >= file_text.size())
+        return {0.0f, offset};
+
+    for (; new_offset < file_text.size(); new_offset++) {
+        if (file_text[new_offset] == '-') {
+            if (number.empty()) {
+                number.push_back(file_text[new_offset]);
+                continue;
+            }
+            Logger::Error("Error while parsing number, Index: " + std::to_string(new_offset) + " Extra negative sign.");
+            return {0.0f, offset};
+        }
+
+        else if (file_text[new_offset] == '.') {
+            if (!decimal_used) {
+                number.push_back(file_text[new_offset]);
+                decimal_used = true;
+                continue;
+            }
+            Logger::Error("Error parsing number at: " + std::to_string(new_offset) + " Extra decimal point.");
+            return {0.0f, offset};
+        }
+
+        else if (isdigit(file_text[new_offset]))
+            number.push_back(file_text[new_offset]);
+        else
+            break;
+    }
+    return {std::stof(number), new_offset};
+}
+
+std::pair<Vector2, unsigned long> ParseVector2(const std::string& file_text, const unsigned long& offset) {
+    auto x_result = ParseNumber(file_text, offset);
+    auto y_result = ParseNumber(file_text, x_result.second + 1);
+
+    // If the new offset is the same as the offset we passed in then we know it didn't work.
+    if (x_result.second == offset || y_result.second == x_result.second)
+        return {Vector2(0, 0), offset};
+
+    return {Vector2(x_result.first, y_result.first), y_result.second + 1};
+}
+
+std::pair<Vector3, unsigned long> ParseVector3(const std::string& file_text, const unsigned long& offset) {
+    auto x_result = ParseNumber(file_text, offset);
+    auto y_result = ParseNumber(file_text, x_result.second + 1);
+    auto z_result = ParseNumber(file_text, y_result.second + 1);
+
+    // If the new offset is the same as the offset we passed in then we know it didn't work.
+    if (x_result.second == offset || y_result.second == x_result.second || z_result.second == y_result.second)
+        return {Vector3(0,0,0), offset};
+
+    return {Vector3(x_result.first, y_result.first, z_result.first), z_result.second + 1};
+}
+
+std::pair<Vector4, unsigned long> ParseVector4(const std::string& file_text, const unsigned long& offset) {
+    auto x_result = ParseNumber(file_text, offset);
+    auto y_result = ParseNumber(file_text, x_result.second + 1);
+    auto z_result = ParseNumber(file_text, y_result.second + 1);
+    auto w_result = ParseNumber(file_text, z_result.second + 1);
+
+    if (x_result.second == offset || y_result.second == x_result.second || z_result.second == y_result.second || w_result.second == z_result.second)
+        return {Vector4(0, 0, 0, 0), offset};
+
+    return {Vector4(x_result.first, y_result.first, z_result.first, w_result.first), w_result.second + 1};
+}
+
+std::pair<std::array<Vector3, 3>, unsigned long> ParseWavefrontFaceData(const std::string& file_text, const unsigned long& offset) {
+    unsigned long new_offset = offset;
+    std::array<Vector3, 3> face_data;
+
+    for (unsigned int i = 0; i < 3; i++) {
+        Vector3 vertex = {-1, -1, -1};
+
+        // Vertex
+        if (std::isdigit(file_text[new_offset])) {
+            auto v_result = ParseNumber(file_text, new_offset);
+            vertex.x = v_result.first;
+            new_offset = v_result.second;
+        }
+
+        // UV
+        if (new_offset < file_text.size() && file_text[new_offset] == '/') {
+            new_offset++;
+
+            if (new_offset < file_text.size() && (std::isdigit(file_text[new_offset]))) {
+                auto vt_result = ParseNumber(file_text, new_offset);
+                vertex.y = vt_result.first;
+                new_offset = vt_result.second;
+            }
+        }
+
+        // Normal
+        if (new_offset < file_text.size() && file_text[new_offset] == '/') {
+            new_offset++;
+
+            if (new_offset < file_text.size() && (std::isdigit(file_text[new_offset]))) {
+                auto vn_result = ParseNumber(file_text, new_offset);
+                vertex.z = vn_result.first;
+                new_offset = vn_result.second;
+            }
+        }
+
+        face_data[i] = vertex;
+        new_offset++;
+    }
+    return {face_data, new_offset};
+}
+
+VertexArray VertexArray::LoadWavefrontOBJ(const std::string &file_text) {
+    std::vector<std::array<Vector3, 3>> faceline_data;
+
+    std::vector<TextureCoordinate> temp_uvs;
+    std::vector<Normal> temp_normals;
+    std::vector<Vertex> temp_vertices;
+
+    unsigned long offset = 0;
+    while (offset < file_text.size()) {
+        char c = file_text[offset];
+
+        // TODO the entire line a comment is on should be skipped.
+        // Skip forward to the character after the next newline.
+        if (c == '#' || c == '\n' || c == '\r') {
+            offset++;
+            continue;
+        }
+
+        // Vertices
+        if (c == 'v' && offset + 1 < file_text.size() && file_text[offset + 1] == ' ') {
+            offset += 2;
+
+            auto vertex_result = ParseVector3(file_text, offset);
+            if (vertex_result.second != offset) {
+                temp_vertices.push_back(vertex_result.first);
+                offset = vertex_result.second;
+            }
+        }
+
+            // Normals.
+        else if (c == 'v' && offset + 2 < file_text.size() && file_text[offset + 1] == 'n' &&
+                 file_text[offset + 2] == ' ') {
+            offset += 3;
+
+            auto normal_result = ParseVector3(file_text, offset);
+            if (normal_result.second != offset) {
+                temp_normals.push_back(normal_result.first);
+                offset = normal_result.second;
+            }
+        }
+
+            // Texture Coordinates
+        else if (c == 'v' && offset + 2 < file_text.size() && file_text[offset + 1] == 't' &&
+                 file_text[offset + 2] == ' ') {
+            offset += 3;
+
+            auto uv_result = ParseVector2(file_text, offset);
+            if (uv_result.second != offset) {
+                temp_uvs.push_back(uv_result.first);
+                offset = uv_result.second;
+            }
+        }
+
+            // Face lines.
+        else if (c == 'f' && offset + 1 < file_text.size() && file_text[offset + 1] == ' ') {
+            offset += 2;
+
+            auto faceline_result = ParseWavefrontFaceData(file_text, offset);
+            if (faceline_result.second != offset) {
+                faceline_data.push_back(faceline_result.first);
+                offset = faceline_result.second;
+            }
+        } else
+            offset++;
+    }
+
+// Pick everything out of the face lines and set up how OpenGL expects.
+    std::vector<Vertex> final_vertices;
+    std::vector<TextureCoordinate> final_uvs;
+    std::vector<Normal> final_normals;
+    std::vector<unsigned int> final_indices;
+    for (const auto &face: faceline_data) {
+        for (const auto &vp: face) {
+            Vertex vertex;
+            TextureCoordinate uv;
+            Normal normal;
+
+            if (vp.x != -1)
+                vertex = temp_vertices[vp.x - 1];
+            if (vp.y != -1)
+                uv = temp_uvs[vp.y - 1];
+            if (vp.z != -1)
+                normal = temp_normals[vp.z - 1];
+
+            final_vertices.push_back(vertex);
+            final_uvs.push_back(uv);
+            final_normals.push_back(normal);
+            final_indices.push_back((unsigned int) final_vertices.size() - 1);
+        }
+    }
+
+    return VertexArray(
+            final_vertices.data(), final_vertices.size(),
+            final_indices.data(), final_indices.size(),
+            final_normals.data(), final_normals.size(),
+            final_uvs.data(), final_uvs.size());
+}
+
+/*
+VertexArray JGL::LoadAMO(const std::string& file_text) {
+    std::vector<Vector3> temp_vertices;
+    std::vector<Vector3> temp_normals;
+    std::vector<Vector2> temp_uvs;
+    std::vector<std::array<Vector3, 3>> faceline_data;
+    std::string name;
+
+    unsigned long offset = 0;
+    while (offset < file_text.size()) {
+        char c = file_text[offset];
+
+        // If we've dropped on a newline character somehow then just skip passed it.
+        if (c == '\n' || c == '\r') {
+            offset++; continue;
+        }
+
+        // File name.
+        else if (offset + 2 < file_text.size() && c == 'a' && file_text[offset + 1] == 'o' && file_text[offset + 2] == ' ') {
+            offset += 3;
+            while (offset < file_text.size()) {
+                if (file_text[offset] != '\n' && file_text[offset] != '\r')
+                    name.push_back(file_text[offset]), offset++;
+                else
+                    break;
+            }
+        }
+
+        // Vertices
+        else if (offset + 1 < file_text.size() && c == 'v' && file_text[offset + 1] == ' ') {
+            offset += 2; auto parsed_number = ParseNumber(file_text, offset);
+
+            if (parsed_number.second == offset)
+                Logger::Fatal("We couldn't interpret the Vertex count at: " + std::to_string(offset));
+
+            unsigned long vertex_count = parsed_number.first;
+            offset = parsed_number.second;
+
+            for (unsigned long i = 0; i < vertex_count; i++) {
+                // Skip by newlines.
+                while (file_text[offset] == '\n' || file_text[offset] == '\r')
+                    offset++;
+
+                auto parsed_vector3 = ParseVector3(file_text, offset);
+                if (parsed_vector3.second == offset)
+                    Logger::Fatal("We couldn't interpret the Vertex at: " + std::to_string(offset));
+
+                temp_vertices.push_back(parsed_vector3.first);
+                offset = parsed_vector3.second;
+            }
+        }
+
+        // UVs
+        else if (offset + 2 < file_text.size() && c == 'v' && file_text[offset + 1] == 't' && file_text[offset + 2] == ' ') {
+            offset += 3; auto parsed_number = ParseNumber(file_text, offset);
+
+            if (parsed_number.second == offset)
+                Logger::Fatal("We couldn't interpret the UV count at: " + std::to_string(offset));
+
+            unsigned long uv_count = parsed_number.first;
+            offset = parsed_number.second;
+
+            for (unsigned long i = 0; i < uv_count; i++) {
+                // Skip by newlines.
+                while (file_text[offset] == '\n' || file_text[offset] == '\r')
+                    offset++;
+
+                auto parsed_vector2 = ParseVector2(file_text, offset);
+                if (parsed_vector2.second == offset)
+                    Logger::Fatal("We couldn't interpret the UV at: " + std::to_string(offset));
+
+                temp_uvs.push_back(parsed_vector2.first);
+                offset = parsed_vector2.second;
+            }
+        }
+
+        // Normals
+        else if (offset + 2 < file_text.size() && c == 'v' && file_text[offset + 1] == 'n' && file_text[offset + 2] == ' ') {
+            offset += 3; auto parsed_number = ParseNumber(file_text, offset);
+
+            if (parsed_number.second == offset)
+                Logger::Fatal("We couldn't interpret the Normal count at: " + std::to_string(offset));
+
+            unsigned long uv_count = parsed_number.first;
+            offset = parsed_number.second;
+
+            for (unsigned long i = 0; i < uv_count; i++) {
+                // Skip by newlines.
+                while (file_text[offset] == '\n' || file_text[offset] == '\r')
+                    offset++;
+
+                auto parsed_vector3 = ParseVector3(file_text, offset);
+                if (parsed_vector3.second == offset)
+                    Logger::Fatal("We couldn't interpret the Normal at: " + std::to_string(offset));
+
+                temp_normals.push_back(parsed_vector3.first);
+                offset = parsed_vector3.second;
+            }
+        }
+
+        // Face Lines
+        else if (offset + 1 < file_text.size() && c == 'f'  && file_text[offset + 1] == ' ') {
+            offset += 2; auto parsed_number = ParseNumber(file_text, offset);
+
+            if (parsed_number.second == offset)
+                Logger::Fatal("We couldn't interpret the Face Line count at: " + std::to_string(offset));
+
+            unsigned long faceline_count = parsed_number.first;
+            for (unsigned long i = 0; i < faceline_count; i++) {
+                // Skip by newlines.
+                while (file_text[offset] == '\n' || file_text[offset] == '\r')
+                    offset++;
+
+                
+            }
+        }
+
+    }
+}
+ */