Stripped back old shader code for now.

archive/Shader.cpp

@@ -0,0 +1,8 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "Shader.hpp"
+
+using namespace Dawn;

archive/Shader.hpp

@@ -0,0 +1,259 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/ShaderStage.hpp"
+#include "display/shader/IShader.hpp"
+#include "assert/assert.hpp"
+#include "assert/assertgl.hpp"
+#include "display/Color.hpp"
+#include "display/Texture.hpp"
+
+#include "ShaderParameter.hpp"
+#include "ShaderStructure.hpp"
+
+namespace Dawn {
+  typedef GLuint shadertexturebinding_t;
+
+  enum class ShaderOpenGLVariant {
+    GLSL_330_CORE
+  };
+
+  template<typename T>
+  class Shader : public IShader<T> {
+    private:
+      std::vector<std::shared_ptr<ShaderStage>> stages;
+      std::vector<struct ShaderParameter> parameters;
+      std::vector<struct IShaderStructure> structures;
+      enum ShaderOpenGLVariant variant;
+
+      GLuint shaderProgram = -1;
+
+    protected:
+      /**
+       * Overridable function to get the stages for the shader.
+       * 
+       * @param variant The variant of the shader to use.
+       * @param rel The relative data to use.
+       * @param stages The stages to add to.
+       * @param parameters The parameters to add to.
+       * @param structures The structures to add to.
+       */
+      virtual void getStages(
+        const enum ShaderOpenGLVariant variant,
+        const T *rel,
+        std::vector<std::shared_ptr<ShaderStage>> &stages,
+        std::vector<struct ShaderParameter> &parameters,
+        std::vector<struct IShaderStructure> &structures
+      ) = 0;
+
+    public:
+      /**
+       * Initializes the shader, this needs to be called before the shader can
+       * be used.
+       */
+      void init() override {
+        // Determine which kind of OpenGL shader to use.
+        variant = ShaderOpenGLVariant::GLSL_330_CORE;
+
+        // Now get the stages
+        T dummy;
+        this->getStages(
+          variant,
+          &dummy,
+          stages,
+          parameters,
+          structures
+        );
+
+        // Create the shader program
+        shaderProgram = glCreateProgram();
+        assertNoGLError();
+
+        // Attach all the stages
+        for(auto stage : stages) {
+          glAttachShader(shaderProgram, stage->id);
+          assertNoGLError();
+        }
+
+        // Link and verify the program
+        glLinkProgram(shaderProgram);
+        assertNoGLError();
+
+        GLint status;
+        glGetProgramiv(shaderProgram, GL_LINK_STATUS, &status);
+        assertNoGLError();
+        assertTrue(status == GL_TRUE, "Failed to link shader program.");
+
+        std::vector<std::string> uniformNames;
+        GLint numUniforms = 0;
+
+        // Get the number of active uniforms
+        glGetProgramiv(shaderProgram, GL_ACTIVE_UNIFORMS, &numUniforms);
+        assertNoGLError();
+
+        // Iterate through each uniform
+        // for (GLint i = 0; i < numUniforms; ++i) {
+        //   char name[256];
+        //   GLsizei length;
+        //   GLint size;
+        //   GLenum type;
+
+        //   // Get the uniform name
+        //   glGetActiveUniform(shaderProgram, i, sizeof(name), &length, &size, &type, name);
+        //   assertNoGLError();
+        //   std::cout << "Uniform: " << i << ":" << name << std::endl;
+        //   // uniformNames.push_back(std::string(name));
+        // }
+
+        // Map parameters correctly.
+        std::for_each(
+          parameters.begin(),
+          parameters.end(),
+          [&](struct ShaderParameter &param) {
+            // Correct offset
+            param.offset = param.offset - (size_t)(&dummy);
+            param.location = glGetUniformLocation(
+              shaderProgram,
+              param.name.c_str()
+            );
+            assertNoGLError();
+            assertTrue(
+              param.location != -1,
+              "Failed to get location for parameter %s.",
+              param.name.c_str()
+            );
+          }
+        );
+
+        // Map structures
+        std::for_each(
+          structures.begin(),
+          structures.end(),
+          [&](struct IShaderStructure &structure) {
+            structure.offset = structure.offset - (size_t)(&dummy);
+            structure.location = glGetUniformBlockIndex(
+              shaderProgram,
+              structure.structureName.c_str()
+            );
+            assertNoGLError();
+            assertTrue(
+              structure.location != -1,
+              "Failed to get location for structure %s.",
+              structure.structureName.c_str()
+            );
+
+            // Create the buffer
+            glGenBuffers(1, &structure.buffer);
+          }
+        );
+
+        this->bind();
+      }
+
+      /**
+       * Binds the shader as the current one, does not upload any data, somewhat
+       * relies on something else uploading the data.
+       */
+      void bind() override {
+        glUseProgram(shaderProgram);
+        assertNoGLError();
+      }
+
+      /**
+       * Uploads the data to the GPU.
+       */
+      void upload() override {
+        switch(this->variant) {
+          case ShaderOpenGLVariant::GLSL_330_CORE:
+            for(auto param : parameters) {
+              void *value = (void*)(
+                ((size_t)&this->data) + param.offset
+              );
+
+              switch(param.type) {
+                case ShaderParameterType::MAT4: {
+                  glm::mat4 *matrix = (glm::mat4 *)value;
+                  if(param.count != 1) {
+                    assertUnreachable("I haven't implemented multiple mat4s");
+                  }
+                  glUniformMatrix4fv(
+                    param.location, 1, GL_FALSE, glm::value_ptr(*matrix)
+                  );
+                  break;
+                }
+                
+                case ShaderParameterType::COLOR: {
+                  auto color = (Color *)value;
+                  glUniform4fv(
+                    param.location,
+                    param.count,
+                    (GLfloat*)value
+                  );
+                  break;
+                }
+
+                case ShaderParameterType::BOOLEAN: {
+                  glUniform1iv(param.location, param.count, (GLint*)value);
+                  break;
+                }
+
+                case ShaderParameterType::TEXTURE: {
+                  glUniform1iv(param.location, param.count, (GLint*)value);
+                  break;
+                }
+
+                default: {
+                  assertUnreachable("Unsupported ShaderParameterType");
+                }
+              }
+
+              assertNoGLError();
+            }
+            break;
+
+          default:
+            assertUnreachable("Unsupported ShaderOpenGLVariant");
+        }
+
+        // Upload structures
+        for(auto structure : structures) {
+          switch(structure.structureType) {
+            case ShaderOpenGLStructureType::STD140: {
+              // Upload the data
+              glBindBuffer(GL_UNIFORM_BUFFER, structure.buffer);
+              assertNoGLError();
+              glBindBufferBase(GL_UNIFORM_BUFFER, structure.location, structure.buffer); 
+              assertNoGLError();
+              glBufferData(
+                GL_UNIFORM_BUFFER,
+                structure.size * structure.count,
+                (void*)((size_t)&this->data + (size_t)structure.offset),
+                GL_STATIC_DRAW
+              );
+              assertNoGLError();
+              break;
+            }
+
+            default:
+              assertUnreachable("Unsupported ShaderOpenGLStructureType");
+          }
+        }
+      }
+
+      ~Shader() {
+        // Delete the structures
+        for(auto structure : structures) {
+          assertTrue(structure.buffer != -1, "Invalid buffer.");
+          glDeleteBuffers(1, &structure.buffer);
+          assertNoGLError();
+        }
+
+        // Delete the shader program
+        glDeleteProgram(shaderProgram);
+        assertNoGLError();
+      }
+  };
+}

archive/ShaderParameter.cpp

@@ -0,0 +1,20 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "ShaderParameter.hpp"
+
+using namespace Dawn;
+
+ShaderParameter::ShaderParameter( 
+  const std::string &name,
+  const void *offset,
+  const enum ShaderParameterType type,
+  const size_t count
+) {
+  this->name = name;
+  this->offset = (size_t)offset;
+  this->type = type;
+  this->count = count;
+}

archive/ShaderParameter.hpp

@@ -0,0 +1,33 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/IShader.hpp"
+#include "dawnopengl.hpp"
+
+namespace Dawn {
+  struct ShaderParameter {
+    std::string name;
+    size_t offset;
+    enum ShaderParameterType type;
+    size_t count;
+    GLint location = -1;
+
+    /**
+     * Construct a new shader parameter.
+     * 
+     * @param name Name of the parameter within the shader.
+     * @param offset Offset, relative to the structure of the data.
+     * @param type Type of the parameter.
+     * @param count How many elements in the array (if multiple).
+     */
+    ShaderParameter(
+      const std::string &name,
+      const void *offset,
+      const enum ShaderParameterType type,
+      const size_t count = 1
+    );
+  };
+}

archive/ShaderStage.cpp

@@ -0,0 +1,74 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "assert/assertgl.hpp"
+#include "assert/assert.hpp"
+#include "ShaderStage.hpp"
+
+using namespace Dawn;
+
+ShaderStage::ShaderStage(
+  const enum ShaderStageType type,
+  const std::string source
+) : IShaderStage(type) {
+  // Get OpenGL Shader Type
+  GLenum shaderType;
+  switch(this->type) {
+    case ShaderStageType::VERTEX:
+      shaderType = GL_VERTEX_SHADER;
+      break;
+
+    case ShaderStageType::FRAGMENT:
+      shaderType = GL_FRAGMENT_SHADER;
+      break;
+
+    // case ShaderStageType::COMPUTE:
+    //   shaderType = GL_COMPUTE;
+    //   break;
+
+    default:
+      assertUnreachable("Unknown ShaderStageType");
+  }
+
+  // Initialize the shader
+  this->id = glCreateShader(shaderType);
+  assertNoGLError();
+
+  // Compile the shader
+  auto cSource = source.c_str();
+  glShaderSource(this->id, 1, &cSource, NULL);
+  assertNoGLError();
+  glCompileShader(this->id);
+  assertNoGLError();
+  
+  // glShaderBinary(1, &this->id, GL_SHADER_BINARY_FORMAT_SPIR_V, source.data(), source.size());
+  // assertNoGLError();
+  // glSpecializeShader(this->id, "main", 0, NULL, NULL);
+  // assertNoGLError();
+
+  // Validate
+  GLint status;
+  glGetShaderiv(this->id, GL_COMPILE_STATUS, &status);
+  assertNoGLError();
+
+  if(!status) {
+    // Failed to compile
+    GLint logLength;
+    glGetShaderiv(this->id, GL_INFO_LOG_LENGTH, &logLength);
+    assertNoGLError();
+
+    GLchar *log = new GLchar[logLength];
+    glGetShaderInfoLog(this->id, logLength, NULL, log);
+    assertNoGLError();
+    assertUnreachable("Failed to compile shader stage %i:\n%s", type, log);
+  }
+}
+
+ShaderStage::~ShaderStage() {
+  if(this->id != -1) {
+    glDeleteShader(this->id);
+    assertNoGLError();
+  }
+}

archive/ShaderStage.hpp

@@ -0,0 +1,28 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawnopengl.hpp"
+#include "display/shader/IShaderStage.hpp"
+
+namespace Dawn {
+  class ShaderStage : public IShaderStage {
+    public:
+      GLuint id = -1;
+
+      /**
+       * Constructs a new ShaderStage.
+       * 
+       * @param type The type of shader this is.
+       * @param source The source code to compile.
+       */
+      ShaderStage(const enum ShaderStageType type, const std::string source);
+
+      /**
+       * Disposes of the shader stage.
+       */
+      ~ShaderStage();
+  };
+}

archive/ShaderStructure.hpp

@@ -0,0 +1,96 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma ocne
+#include "display/shader/ShaderParameter.hpp"
+
+namespace Dawn {
+  enum class ShaderOpenGLStructureType {
+    STD140
+  };
+
+  struct IShaderStructure {
+    std::string structureName;
+    size_t offset;
+    enum ShaderOpenGLStructureType structureType;
+    size_t size;
+    size_t count;
+    std::vector<struct ShaderParameter> parameters;
+    GLint location = -1;
+    GLuint buffer = -1;
+  };
+  
+  template<typename T>
+  struct ShaderStructure final : public IShaderStructure {
+    public:
+      /**
+       * Constructs a new shader structure. Shader structures allow for larger
+       * amounts/volumes of data to be passed to the shader in a single call.
+       * Ideally I wouldn't really need this as I wanted the entire shader to
+       * basically be a single large structure, but OpenGL doesn't support that
+       * so I have to do this instead.
+       * 
+       * @param structureName Structure name within the shader.
+       * @param offset Offset, within the data structure, that this structure
+       *               starts at.
+       * @param structureType The type of structure data format to use.
+       * @param getParameters A callback that, when invoked, will populate the
+       *                      parameters vector with the parameters for this
+       *                      structure.
+       * @param count The number of structures to create.
+       */
+      ShaderStructure(
+        const std::string &structureName,
+        const void *offset,
+        const enum ShaderOpenGLStructureType structureType,
+        std::function<
+          void(const T&, std::vector<struct ShaderParameter>&)
+        > getParameters,
+        size_t count = 1
+      ) {
+        this->structureName = structureName;
+        this->offset = (size_t)offset;
+        this->structureType = structureType;
+        this->size = sizeof(T);
+        this->count = count;
+        this->parameters = std::vector<struct ShaderParameter>();
+
+        T dummy;
+        getParameters(dummy, this->parameters);
+
+        // Update offsets.
+        auto itParams = this->parameters.begin();
+        while(itParams != this->parameters.end()) {
+          struct ShaderParameter &param = *itParams;
+          param.offset -= (size_t)(&dummy);
+
+          // Check for non-aligned OpenGL structures.
+          if(param.offset % sizeof(glm::vec4) != 0) {
+            assertUnreachable(
+              "%s%s%s",
+              "Non-aligned OpenGL structure detected on param ",
+              param.name.c_str(),
+              "!\nEnsure you have padded correctly."
+            );
+          }
+
+          if(
+            itParams == (this->parameters.end() - 1) &&
+            count > 1 &&
+            (sizeof(T) % sizeof(glm::vec4)) != 0
+          ) {
+            assertUnreachable(
+              "%s%s%s",
+              "Non-aligned OpenGL structure detected on last element in array structure on param ",
+              param.name.c_str(),
+              "!\nEnsure you have padded correctly."
+            );
+          }
+
+          ++itParams;
+        }
+      }
+  };
+}

archive/SimpleTexturedShader.cpp

@@ -0,0 +1,230 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "display/shader/SimpleTexturedShader.hpp"
+
+#include <fstream>
+#include "slang.h"
+#include "slang-gfx.h"
+using namespace slang;
+
+using namespace Dawn;
+
+void SimpleTexturedShader::getStages(
+  const enum ShaderOpenGLVariant variant,
+  const struct SimpleTexturedShaderData *rel,
+  std::vector<std::shared_ptr<ShaderStage>> &stages,
+  std::vector<struct ShaderParameter> &parameters,
+  std::vector<struct IShaderStructure> &structures
+) {
+  // Stages
+  std::shared_ptr<ShaderStage> vertex;
+  std::shared_ptr<ShaderStage> fragment;
+
+  std::string shader = R"(
+    cbuffer Uniforms {
+      float4x4 u_Projection;
+      float4x4 u_View;
+      float4x4 u_Model;
+      float4 u_Color;
+      bool u_HasTexture;
+      uniform Sampler2D u_Texture;
+    };
+
+    struct AssembledVertex {
+      float3 position : POSITION;
+      float2 texcoord : TEXCOORD;
+    };
+
+    struct Fragment {
+      float4 color;
+    };
+
+    struct VertexStageOutput {
+      float2 uv : UV;
+      float4 sv_position : SV_Position;
+    };
+
+    [shader("vertex")]
+    VertexStageOutput vertexMain(
+      AssembledVertex assembledVertex
+    ) {
+      VertexStageOutput output;
+
+      float3 position = assembledVertex.position;
+
+      output.uv = assembledVertex.texcoord;
+
+      output.sv_position = mul(
+        float4(position, 1.0),
+        mul(u_Model, mul(u_View, u_Projection))
+      );
+
+      return output;
+    }
+
+    [shader("fragment")]
+    Fragment fragmentMain(
+      float2 uv: UV
+    ) : SV_Target {
+      Fragment output;
+      if(u_HasTexture) {
+        output.color = u_Texture.Sample(uv) * u_Color;
+      } else {
+        output.color = u_Color;
+      }
+      return output;
+    }
+  )";
+  Slang::ComPtr<IGlobalSession> globalSession;
+  createGlobalSession(globalSession.writeRef());
+
+  SessionDesc sessionDesc;
+
+  TargetDesc targetDesc;
+  targetDesc.format = SLANG_GLSL;
+  targetDesc.profile = globalSession->findProfile("glsl_330");
+  sessionDesc.targets = &targetDesc;
+  sessionDesc.targetCount = 1;
+
+  Slang::ComPtr<IBlob> diagnostics;
+  const char* searchPaths[] = { "/home/yourwishes/htdocs/Dawn/assets/shaders/" };
+  sessionDesc.searchPaths = searchPaths;
+  sessionDesc.searchPathCount = 1;
+
+  Slang::ComPtr<ISession> session;
+  globalSession->createSession(sessionDesc, session.writeRef());
+  auto module = session->loadModuleFromSourceString(
+    "hello-world.slang",
+    "hello-world.slang",
+    shader.c_str(),
+    diagnostics.writeRef()
+  );
+  if(diagnostics) {
+    assertUnreachable("Failed to load module %s", (const char*) diagnostics->getBufferPointer());
+    return;
+  }
+
+  Slang::ComPtr<IEntryPoint> vertexEntryPoint;
+  Slang::ComPtr<IEntryPoint> fragEntryPoint;
+  module->findEntryPointByName("vertexMain", vertexEntryPoint.writeRef());
+  module->findEntryPointByName("fragmentMain", fragEntryPoint.writeRef());
+
+  IComponentType* components[] = { module, vertexEntryPoint, fragEntryPoint };
+  Slang::ComPtr<IComponentType> program;
+  session->createCompositeComponentType(
+    components,
+    sizeof(components) / sizeof(components[0]),
+    program.writeRef()
+  );
+
+  Slang::ComPtr<IComponentType> linkedProgram;
+  auto result = program->link(linkedProgram.writeRef(), diagnostics.writeRef());
+  std::cout << "Result: " << result << std::endl;
+  if(diagnostics) {
+    assertUnreachable("%s\n", (const char*) diagnostics->getBufferPointer());
+    return;
+  }
+
+  int entryPointIndex = 0;
+  int targetIndex = 0; // only one target
+  Slang::ComPtr<IBlob> vertexBlob;
+  result = linkedProgram->getEntryPointCode(
+    entryPointIndex,
+    targetIndex,
+    vertexBlob.writeRef(),
+    diagnostics.writeRef()
+  );
+  if(diagnostics) {
+    assertUnreachable("%s\n", (const char*) diagnostics->getBufferPointer());
+    return;
+  }
+
+  slang::ProgramLayout* layout = program->getLayout();
+  unsigned parameterCount = layout->getParameterCount();
+  for(unsigned pp = 0; pp < parameterCount; pp++) {
+    slang::VariableLayoutReflection* parameter = layout->getParameterByIndex(pp);
+    std::cout << "Parameter: " << parameter->getName() << std::endl;
+    
+    auto layout = parameter->getTypeLayout();
+    auto fields = layout->getFieldCount();
+    for(unsigned ff = 0; ff < fields; ff++) {
+      slang::VariableLayoutReflection* field = layout->getFieldByIndex(ff);
+      std::string fieldName = field->getName();
+      std::cout << "Field: " << fieldName << std::endl;
+    }
+  }
+
+  std::string vertexString = (const char*)vertexBlob->getBufferPointer();
+
+  entryPointIndex = 1;
+  Slang::ComPtr<IBlob> fragmentBlob;
+  result = linkedProgram->getEntryPointCode(
+    entryPointIndex,
+    targetIndex,
+    fragmentBlob.writeRef(),
+    diagnostics.writeRef()
+  );
+  if(diagnostics) {
+    assertUnreachable("%s\n", (const char*) diagnostics->getBufferPointer());
+    return;
+  }
+
+  std::string fragmentString = (const char*)fragmentBlob->getBufferPointer();
+
+  vertex = std::make_shared<ShaderStage>(
+    ShaderStageType::VERTEX, vertexString
+  );
+  stages.push_back(vertex);
+
+  fragment = std::make_shared<ShaderStage>(
+    ShaderStageType::FRAGMENT, fragmentString
+  );
+  stages.push_back(fragment);
+
+  structures.push_back(ShaderStructure<struct SimpleTexturedShaderDataSub>(
+    "block_SLANG_ParameterGroup_Uniforms_std140_0",
+    &rel->data,
+    ShaderOpenGLStructureType::STD140,
+    [](const SimpleTexturedShaderDataSub &data, std::vector<struct ShaderParameter> &parameters) {
+      parameters.push_back(ShaderParameter(
+        "u_Projection_0",
+        &data.projection,
+        ShaderParameterType::MAT4
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "u_View_0",
+        &data.view,
+        ShaderParameterType::MAT4
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "u_Model_0",
+        &data.model,
+        ShaderParameterType::MAT4
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "u_Color_0",
+        &data.color,
+        ShaderParameterType::COLOR
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "u_HasTexture_0",
+        &data.hasTexture,
+        ShaderParameterType::BOOLEAN
+      ));
+    }
+  ));
+
+  // Parameters
+  parameters.push_back(ShaderParameter(
+    "Uniforms_u_Texture_0",
+    &rel->texture,
+    ShaderParameterType::TEXTURE
+  ));
+}

archive/SimpleTexturedShader.hpp

@@ -0,0 +1,34 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/Shader.hpp"
+
+namespace Dawn {
+  struct SimpleTexturedShaderDataSub {
+    glm::mat4 projection;
+    glm::mat4 view;
+    glm::mat4 model;
+    struct Color color = COLOR_WHITE;
+
+    bool hasTexture = false;
+  };
+
+  struct SimpleTexturedShaderData {
+    struct SimpleTexturedShaderDataSub data;
+    shadertexturebinding_t texture = 0;
+  };
+
+  class SimpleTexturedShader : public Shader<SimpleTexturedShaderData> {
+    protected:
+      void getStages(
+        const enum ShaderOpenGLVariant variant,
+        const struct SimpleTexturedShaderData *rel,
+        std::vector<std::shared_ptr<ShaderStage>> &stages,
+        std::vector<struct ShaderParameter> &parameters,
+        std::vector<struct IShaderStructure> &structures
+      ) override;
+  };
+}

archive/UIShader.cpp

@@ -0,0 +1,194 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "display/shader/UIShader.hpp"
+#include "util/Macro.hpp"
+
+using namespace Dawn;
+
+void UIShader::getStages(
+  const enum ShaderOpenGLVariant variant,
+  const struct UIShaderData *rel,
+  std::vector<std::shared_ptr<ShaderStage>> &stages,
+  std::vector<struct ShaderParameter> &parameters,
+  std::vector<struct IShaderStructure> &structures
+) {
+  // Stages
+  std::shared_ptr<ShaderStage> vertex;
+  std::shared_ptr<ShaderStage> fragment;
+
+  switch(variant) {
+    case ShaderOpenGLVariant::GLSL_330_CORE:
+      vertex = std::make_shared<ShaderStage>(
+        ShaderStageType::VERTEX,
+        "#version 330 core\n"
+        "layout (location = 0) in vec3 aPos;\n"
+        "layout (location = 1) in vec2 aTexCoord;\n"
+        "uniform mat4 u_Projection;\n"
+        "uniform mat4 u_View;\n"
+        "uniform mat4 u_Model;\n"
+        "struct UIShaderQuad {\n"
+          "vec4 quad;\n"
+          "vec4 uv;\n"
+          "vec4 color;\n"
+          "vec4 style;\n"
+        "};\n"
+        "layout (std140) uniform ub_Quad {\n"
+          "UIShaderQuad quads[" MACRO_STRINGIFY(UI_SHADER_QUAD_COUNT) "];\n"
+        "};\n"
+        "out vec2 v_TextCoord;\n"
+        "out vec4 v_Color;\n"
+        "out vec4 v_Style;\n"
+        "void main() {\n"
+          "vec4 pos;\n"
+          "vec2 coord;\n"
+          "int index = int(aPos.z);\n"
+          "int quadIndex = index / 4;\n"
+          "int vertexIndex = index % 4;\n"
+          "UIShaderQuad quad = quads[quadIndex];\n"
+          "if(vertexIndex == 0) {\n"
+            "pos.x = quad.quad.x;\n"
+            "pos.y = quad.quad.y;\n"
+            "coord.x = quad.uv.x;\n"
+            "coord.y = quad.uv.y;\n"
+          "} else if(vertexIndex == 1) {\n"
+            "pos.x = quad.quad.z;\n"
+            "pos.y = quad.quad.y;\n"
+            "coord.x = quad.uv.z;\n"
+            "coord.y = quad.uv.y;\n"
+          "} else if(vertexIndex == 2) {\n"
+            "pos.y = quad.quad.w;\n"
+            "pos.x = quad.quad.x;\n"
+            "coord.x = quad.uv.x;\n"
+            "coord.y = quad.uv.w;\n"
+          "} else if(vertexIndex == 3) {\n"
+            "pos.x = quad.quad.z;\n"
+            "pos.y = quad.quad.w;\n"
+            "coord.x = quad.uv.z;\n"
+            "coord.y = quad.uv.w;\n"
+          "}\n"
+          "pos.z = 0;\n"
+          "pos.w = 1;\n"
+          "gl_Position = u_Projection * u_View * u_Model * pos;\n"
+          "v_TextCoord = coord;\n"
+          "v_Color = quad.color;\n"
+          "v_Style = quad.style;\n"
+        "}"
+      );
+      
+      fragment = std::make_shared<ShaderStage>(
+        ShaderStageType::FRAGMENT,
+        "#version 330 core\n"
+        "in vec2 v_TextCoord;\n"
+        "in vec4 v_Color;\n"
+        "in vec4 v_Style;\n"
+        "uniform sampler2D u_Texture[" MACRO_STRINGIFY(UI_SHADER_TEXTURE_COUNT) "];\n"
+        "out vec4 o_Color;\n" 
+        "void main() {\n"
+          "vec4 texColor = vec4(1, 1, 1, 1);\n"
+          "int vStyle = int(round(v_Style[0]));\n"
+          "int vTextInd = int(round(v_Style[1]));\n"
+          "switch(vTextInd) {\n"
+            "case -1:\n"
+              "texColor = vec4(1, 1, 1, 1);\n"
+              "break;\n"
+            "case 0:\n"
+              "texColor = texture(u_Texture[0], v_TextCoord);\n"
+              "break;\n"
+            "case 1:\n"
+              "texColor = texture(u_Texture[1], v_TextCoord);\n"
+              "break;\n"
+            "case 2:\n"
+              "texColor = texture(u_Texture[2], v_TextCoord);\n"
+              "break;\n"
+            "case 3:\n"
+              "texColor = texture(u_Texture[3], v_TextCoord);\n"
+              "break;\n"
+            "case 4:\n"
+              "texColor = texture(u_Texture[4], v_TextCoord);\n"
+              "break;\n"
+            "case 5:\n"
+              "texColor = texture(u_Texture[5], v_TextCoord);\n"
+              "break;\n"
+          "}\n"
+          "switch(vStyle) {\n"
+            "case 0:\n"
+              "o_Color = texColor * v_Color;\n"
+              "break;\n"
+            "case 1:\n"
+              "o_Color.rgb = v_Color.rgb;\n"
+              "o_Color.a = texColor.r * v_Color.a;\n"
+              "break;\n"
+          "}\n"
+        "}\n"
+      );
+      break;
+
+    default:
+      assertUnreachable("Unsupported ShaderOpenGLVariant");
+  }
+
+  // Add stages
+  stages.push_back(vertex);
+  stages.push_back(fragment);
+
+  // Parameters
+  parameters.push_back(ShaderParameter(
+    "u_Projection",
+    &rel->projection,
+    ShaderParameterType::MAT4
+  ));
+
+  parameters.push_back(ShaderParameter(
+    "u_View",
+    &rel->view,
+    ShaderParameterType::MAT4
+  ));
+
+  parameters.push_back(ShaderParameter(
+    "u_Model",
+    &rel->model,
+    ShaderParameterType::MAT4
+  ));
+
+  parameters.push_back(ShaderParameter(
+    "u_Texture",
+    &rel->textures,
+    ShaderParameterType::TEXTURE,
+    UI_SHADER_TEXTURE_COUNT
+  ));
+  
+  structures.push_back(ShaderStructure<struct UIShaderQuad>(
+    "ub_Quad",
+    &rel->quads,
+    ShaderOpenGLStructureType::STD140,
+    [&](const struct UIShaderQuad &rel, std::vector<struct ShaderParameter> &parameters) {
+      parameters.push_back(ShaderParameter(
+        "quad",
+        &rel.quad,
+        ShaderParameterType::VEC4
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "uv",
+        &rel.uv,
+        ShaderParameterType::VEC4
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "color",
+        &rel.color,
+        ShaderParameterType::COLOR
+      ));
+
+      parameters.push_back(ShaderParameter(
+        "style",
+        &rel.style,
+        ShaderParameterType::VEC4
+      ));
+    },
+    UI_SHADER_QUAD_COUNT
+  ));
+}

archive/UIShader.hpp

@@ -0,0 +1,43 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/Shader.hpp"
+
+namespace Dawn {
+  #define UI_SHADER_QUAD_COUNT 1024
+  #define UI_SHADER_TEXTURE_COUNT 16
+
+  enum class UIShaderQuadStyle {
+    TEXTURED = 0,
+    FONT = 1
+  };
+
+  struct UIShaderQuad {
+    glm::vec4 quad;
+    glm::vec4 uv;
+    struct Color color;
+    glm::vec4 style;
+  };
+  
+  struct UIShaderData {
+    glm::mat4 projection;
+    glm::mat4 view;
+    glm::mat4 model;
+    shadertexturebinding_t textures[UI_SHADER_TEXTURE_COUNT];
+    struct UIShaderQuad quads[UI_SHADER_QUAD_COUNT];
+  };
+
+  class UIShader : public Shader<UIShaderData> {
+    protected:
+      void getStages(
+        const enum ShaderOpenGLVariant variant,
+        const struct UIShaderData *rel,
+        std::vector<std::shared_ptr<ShaderStage>> &stages,
+        std::vector<struct ShaderParameter> &parameters,
+        std::vector<struct IShaderStructure> &structures
+      ) override;
+  };
+}

archive/component/ui/CMakeLists.txt

@@ -0,0 +1,9 @@
+# Copyright (c) 2023 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    UICanvas.cpp
+)

archive/component/ui/UICanvas.cpp

@@ -0,0 +1,144 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UICanvas.hpp"
+#include "display/pass/RenderPass.hpp"
+#include "display/mesh/QuadMesh.hpp"
+#include "ui/UIElement.hpp"
+
+using namespace Dawn;
+
+void UICanvas::onInit() {
+  mesh = std::make_shared<Mesh>();
+  mesh->createBuffers(
+    QUAD_VERTICE_COUNT * UI_SHADER_QUAD_COUNT,
+    QUAD_INDICE_COUNT * UI_SHADER_QUAD_COUNT
+  );
+
+  for(int32_t i = 0; i < UI_SHADER_QUAD_COUNT; i++) {
+    QuadMesh::bufferWithIndex(
+      mesh,
+      glm::vec4(0, 0, 1, 1),
+      glm::vec4(0, 0, 1, 1),
+      i * QUAD_VERTICE_COUNT,
+      i * QUAD_INDICE_COUNT,
+      i * QUAD_VERTICE_COUNT
+    );
+  }
+}
+
+void UICanvas::onDispose() {
+  mesh = nullptr;
+}
+
+std::vector<std::shared_ptr<IRenderPass>> UICanvas::getPasses(
+struct RenderPassContext &ctx
+) {
+  if(this->elements.empty()) return {};
+
+  glm::mat4 projection;
+  glm::mat4 view;
+  
+  // Setup the projection and views
+  data.projection = glm::ortho(
+    0.0f, ctx.renderTarget->getWidth(),
+    ctx.renderTarget->getHeight(), 0.0f,
+    0.0f, 1.0f
+  );
+  data.view = glm::mat4(1.0f);
+  data.model = glm::mat4(1.0f);
+
+  // Reset the passes
+  this->passes.clear();
+  this->textureBindings.clear();
+  this->textures.clear();
+  quadCount = 0;
+  nextBinding = 0;
+
+  // Alignment root
+  const glm::vec2 rootPosition = { 0, 0 };
+  const glm::vec2 rootSize = {
+    ctx.renderTarget->getWidth(),
+    ctx.renderTarget->getHeight()
+  };
+  const float_t rootScale = 1.0f;
+
+  // Get the quads for each component
+  auto itComponents = elements.begin();
+  auto self = std::ref(*this);
+  while(itComponents != elements.end()) {
+    auto component = *itComponents;
+    component->updateAlignment(rootPosition, rootSize, rootScale);
+    component->getQuads(self);
+    ++itComponents;
+  }
+
+  // Flush the remaining quads
+  flushPass();
+  return passes;
+}
+
+void UICanvas::addQuad(
+  const glm::vec4 quad,
+  const glm::vec4 uvs,
+  const struct Color color,
+  const enum UIShaderQuadStyle style,
+  const std::shared_ptr<Texture> text
+) {
+  glm::vec4 styleData;
+  styleData[0] = (float_t)style;
+
+  if(text == nullptr) {
+    styleData[1] = -1;
+  } else {
+    shadertexturebinding_t texture;
+    auto bindingIt = textureBindings.find(text);
+    if(bindingIt == textureBindings.end()) {
+      if(nextBinding >= UI_SHADER_TEXTURE_COUNT) {
+        flushPass();
+      }
+      textureBindings[text] = nextBinding;
+      textures[nextBinding] = text;
+      data.textures[nextBinding] = nextBinding;
+      texture = nextBinding++;
+    } else {
+      texture = bindingIt->second;
+    }
+    styleData[1] = (float_t)texture;
+  }
+
+  data.quads[quadCount] = {
+    quad,
+    uvs,
+    color,
+    styleData
+  };
+  quadCount++;
+  if(quadCount == UI_SHADER_QUAD_COUNT) flushPass();
+}
+
+void UICanvas::flushPass() {
+  if(quadCount == 0) return;
+
+  auto pass = createRenderPass<UIShader, UIShaderData>(
+    std::ref(*this),
+    data,
+    textures,
+    mesh,
+    MeshDrawMode::TRIANGLES,
+    0,
+    quadCount * QUAD_INDICE_COUNT
+  );
+  passes.push_back(pass);
+
+  quadCount = 0;
+  nextBinding = 0;
+  textures.clear();
+  textureBindings.clear();
+}
+
+void UICanvas::addElement(const std::shared_ptr<UIElement> element) {
+  elements.push_back(element);
+}

archive/component/ui/UICanvas.hpp

@@ -0,0 +1,73 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "scene/SceneItem.hpp"
+#include "component/display/IRenderableComponent.hpp"
+#include "display/shader/UIShader.hpp"
+
+namespace Dawn {
+  class UIElement;
+
+  class UICanvas :
+    public SceneComponent,
+    public IRenderableComponent
+  {
+    private:
+      std::shared_ptr<Mesh> mesh;
+      UIShaderData data;
+      std::vector<std::shared_ptr<UIElement>> elements;
+
+      size_t quadCount = 0;
+      shadertexturebinding_t nextBinding = 0;
+      std::unordered_map<
+        shadertexturebinding_t, std::shared_ptr<Texture>
+      > textures;
+      std::map<
+        std::shared_ptr<Texture>, shadertexturebinding_t
+      > textureBindings;
+      
+      std::vector<std::shared_ptr<IRenderPass>> passes;
+      
+    protected:
+      virtual void onInit() override;
+      virtual void onDispose() override;
+
+      /**
+       * Flushes all pending quads to the render pass. This doesn't actually
+       * render anything, it just flushes the data buffer to a new pass.
+       */
+      void flushPass();
+
+    public:
+      std::vector<std::shared_ptr<IRenderPass>> getPasses(
+        struct RenderPassContext &ctx
+      ) override;
+
+      /**
+       * Adds a quad to the canvas and performs a flush if necessary.
+       * 
+       * @param quad The quad to add.
+       * @param uvs The UVs to use for the quad.
+       * @param color The color to use for the quad.
+       * @param style Style that the quad should be rendered in.
+       * @param texture The texture to use for the quad, can be null.
+       */
+      void addQuad(
+        const glm::vec4 quad,
+        const glm::vec4 uvs,
+        const struct Color color,
+        const enum UIShaderQuadStyle style,
+        const std::shared_ptr<Texture> texture = nullptr
+      );
+
+      /**
+       * Adds a component to the canvas.
+       * 
+       * @param component The component to add.
+       */
+      void addElement(const std::shared_ptr<UIElement> component);
+  };
+}

archive/ui/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Copyright (c) 2023 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    UIAlignableElement.cpp
+    UISubAlignableElement.cpp
+    UIElement.cpp
+    UIMenu.cpp
+)
+
+# Subdirs
+add_subdirectory(container)
+add_subdirectory(elements)

archive/ui/UIAlignableElement.cpp

@@ -0,0 +1,247 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UIAlignableElement.hpp"
+
+using namespace Dawn;
+
+UIAlignableElement::UIAlignableElement() {
+  alignUnit[0] = UIAlignmentUnit::SCALE;
+  alignUnit[1] = UIAlignmentUnit::SCALE;
+  alignUnit[2] = UIAlignmentUnit::SCALE;
+  alignUnit[3] = UIAlignmentUnit::SCALE;
+
+  eventAlignmentUpdated = [&](const glm::vec2 p, const glm::vec2 s) {
+  };
+}
+
+void UIAlignableElement::updateSelfAlignment(
+  const glm::vec2 pPos,
+  const glm::vec2 pSize,
+  const float_t canvasScale
+) {
+  auto valueAxis = [&](
+    const enum UIAlignmentUnit unit,
+    const float_t alignment,
+    const float_t parentSize,
+    const float_t ratioSize,
+    const float_t contentSize
+  ) {
+    if(alignment == UI_ALIGN_SIZE_AUTO) return contentSize;
+
+    switch(unit) {
+      case UIAlignmentUnit::PIXEL:
+        return alignment;
+
+      case UIAlignmentUnit::SCALE:
+        return canvasScale * alignment;
+
+      case UIAlignmentUnit::PERCENT:
+        return parentSize * (alignment / 100.0f);
+
+      case UIAlignmentUnit::RATIO:
+        return (alignment / 100.0f) * ratioSize;
+      
+      default:
+        assertUnreachable("Invalid UIAlignmentType");
+        return 0.0f;
+    }
+  };
+
+  auto alignAxis = [&](
+    const enum UIAlignmentType type,
+    const enum UIAlignmentUnit unit0,
+    const enum UIAlignmentUnit unit1,
+    const float_t alignment0,
+    const float_t alignment1,
+    const float_t parentSize,
+    const float_t ratioSize,
+    const float_t contentSize,
+    float_t &outPosition,
+    float_t &outSize
+  ) {
+    switch(type) {
+      case UIAlignmentType::START:
+        outPosition = valueAxis(
+          unit0,
+          alignment0,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        outSize = valueAxis(
+          unit1,
+          alignment1,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        break;
+
+      case UIAlignmentType::MIDDLE:
+        outSize = valueAxis(
+          unit1,
+          alignment1,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        outPosition = (parentSize / 2.0f) - (contentSize / 2.0f) + valueAxis(
+          unit0,
+          alignment0,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        break;
+
+      case UIAlignmentType::END:
+        outSize = valueAxis(
+          unit0,
+          alignment0,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        outPosition = parentSize - outSize - valueAxis(
+          unit1,
+          alignment1,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        break;
+
+      case UIAlignmentType::STRETCH:
+        outPosition = valueAxis(
+          unit0,
+          alignment0,
+          parentSize,
+          ratioSize,
+          contentSize
+        );
+        outSize = parentSize - (outPosition + valueAxis(
+          unit1,
+          alignment1,
+          parentSize,
+          ratioSize,
+          contentSize
+        ));
+        break;
+
+      default:
+        assertUnreachable("Invalid UIAlignmentType");
+    }
+  };
+
+  bool_t heightFirst = (
+    alignUnit[0] == UIAlignmentUnit::RATIO ||
+    alignUnit[2] == UIAlignmentUnit::RATIO
+  );
+
+  if(heightFirst) {
+    // Align height first, this will define size.y which we can use as the ratio
+    // for the width/X axis alignment.
+    alignAxis(
+      alignY,
+      alignUnit[1],
+      alignUnit[3],
+      align[1],
+      align[3],
+      pSize.y,
+      0,
+      this->getContentHeight(),
+      position.y,
+      size.y
+    );
+    alignAxis(
+      alignX,
+      alignUnit[0],
+      alignUnit[2],
+      align[0],
+      align[2],
+      pSize.x,
+      size.y,
+      this->getContentWidth(),
+      position.x,
+      size.x
+    );
+  } else {
+    alignAxis(
+      alignX,
+      alignUnit[0],
+      alignUnit[2],
+      align[0],
+      align[2],
+      pSize.x,
+      0,
+      this->getContentWidth(),
+      position.x,
+      size.x
+    );
+    alignAxis(
+      alignY,
+      alignUnit[1],
+      alignUnit[3],
+      align[1],
+      align[3],
+      pSize.y,
+      size.x,
+      this->getContentHeight(),
+      position.y,
+      size.y
+    );
+  }
+
+  this->position += pPos;
+  this->eventAlignmentUpdated(position, size);
+}
+
+bool_t UIAlignableElement::hasExplicitWidth() {
+  if(size.x == 0.0f) return false;
+  if(
+    (alignX == UIAlignmentType::STRETCH) ||
+    (alignX == UIAlignmentType::END)
+  ) {
+    return align[0] != UI_ALIGN_SIZE_AUTO;
+  }
+  return align[2] != UI_ALIGN_SIZE_AUTO;
+}
+
+bool_t UIAlignableElement::hasExplicitHeight() {
+  if(size.y == 0.0f) return false;
+  if(
+    (alignY == UIAlignmentType::STRETCH) ||
+    (alignY == UIAlignmentType::END)
+  ) {
+    return align[1] != UI_ALIGN_SIZE_AUTO;
+  }
+  return align[3] != UI_ALIGN_SIZE_AUTO;
+}
+
+float_t UIAlignableElement::getWidth() {
+  if(hasExplicitWidth()) return size.x;
+  return getContentWidth();
+}
+
+float_t UIAlignableElement::getHeight() {
+  if(hasExplicitHeight()) return size.y;
+  return getContentHeight();
+}
+
+
+void UIAlignableElement::updateAlignment(
+  const glm::vec2 pPos,
+  const glm::vec2 pSize,
+  const float_t canvasScale
+) {
+  this->updateSelfAlignment(pPos, pSize, canvasScale);
+
+  // Now update children alignment
+  auto children = getChildren();
+  for(auto &c : children) {
+    c->updateAlignment(this->position, this->size, canvasScale);
+  }
+}

archive/ui/UIAlignableElement.hpp

@@ -0,0 +1,83 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/UIElement.hpp"
+
+namespace Dawn {
+  #define UI_ALIGN_SIZE_AUTO -1.0f
+
+  enum class UIAlignmentType {
+    START,
+    MIDDLE,
+    END,
+    STRETCH
+  };
+
+  enum class UIAlignmentUnit {
+    PIXEL,
+    SCALE,
+    PERCENT,
+    RATIO
+  };
+
+  class UIAlignableElement : public UIElement {
+    protected:
+      glm::vec2 position;
+      glm::vec2 size;
+      
+      /**
+       * Updates the alignment of this element ONLY.
+       * 
+       * @param parentPosition The position of the parent.
+       * @param parentSize The size of the parent.
+       * @param canvasScale The scale of the canvas.
+       */
+      virtual void updateSelfAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      );
+
+      /**
+       * Returns true only if the width of this component is explicitly set.
+       * 
+       * @return True if the width of this component is explicitly set.
+       */
+      bool_t hasExplicitWidth();
+
+      /**
+       * Returns true only if the height of this component is explicitly set.
+       * 
+       * @return True if the height of this component is explicitly set.
+       */
+      bool_t hasExplicitHeight();
+
+    public:
+      // Primary alignment controls
+      glm::vec4 align = glm::vec4(0, 0, 0, 0);
+      enum UIAlignmentType alignX = UIAlignmentType::STRETCH;
+      enum UIAlignmentType alignY = UIAlignmentType::STRETCH;
+      enum UIAlignmentUnit alignUnit[4];
+      
+      std::function<
+        void(const glm::vec2, const glm::vec2)
+      > eventAlignmentUpdated;
+
+      /**
+       * Constructor for the UIAlignableElement.
+       */
+      UIAlignableElement();
+
+      float_t getWidth() override;
+      float_t getHeight() override;
+
+      void updateAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      ) override;
+  };
+}

archive/ui/UIElement.cpp

@@ -0,0 +1,53 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UIElement.hpp"
+#include "assert/assert.hpp"
+
+using namespace Dawn;
+
+std::vector<std::shared_ptr<UIElement>> UIElement::getChildren() {
+  return {};
+}
+
+void UIElement::getSelfQuads(UICanvas &ctx) {
+  //Do nothing
+}
+
+float_t UIElement::getContentWidth() {
+  return 0.0f;
+}
+
+float_t UIElement::getContentHeight() {
+  return 0.0f;
+}
+
+float_t UIElement::getWidth() {
+  return this->getContentWidth();
+}
+
+float_t UIElement::getHeight() {
+  return this->getContentHeight();
+}
+
+void UIElement::getQuads(UICanvas &ctx) {
+  this->getSelfQuads(ctx);
+
+  auto children = getChildren();
+  for(auto &c : children) {
+    c->getQuads(ctx);
+  }
+}
+
+void UIElement::updateAlignment(
+  const glm::vec2 parentPosition,
+  const glm::vec2 parentSize,
+  const float_t canvasScale
+) {
+  auto children = getChildren();
+  for(auto &c : children) {
+    c->updateAlignment(parentPosition, parentSize, canvasScale);
+  }
+}

archive/ui/UIElement.hpp

@@ -0,0 +1,80 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/UIShader.hpp"
+#include "component/ui/UICanvas.hpp"
+
+namespace Dawn {
+  class UIElement {
+    protected:
+      /**
+       * Virtual method overridden by the UIElement to get the quads for the
+       * component.
+       * 
+       * @param alignment The alignment of this component.
+       * @param ctx The canvas to add the quads to.
+       */
+      virtual void getSelfQuads(UICanvas &ctx);
+
+    public:
+      /**
+       * Overrided method by the UI Element that requests the minimum 
+       * width of the content.
+       * 
+       * @return The minimum width of the content.
+       */
+      virtual float_t getContentWidth();
+
+      /**
+       * Overrided method by the UI Element that requests the minimum 
+       * height of the content.
+       * 
+       * @return The minimum height of the content.
+       */
+      virtual float_t getContentHeight();
+
+      /**
+       * Returns the width of this component.
+       * 
+       * @return The width of this component.
+       */
+      virtual float_t getWidth();
+
+      /**
+       * Returns the height of this component.
+       * 
+       * @return The height of this component.
+       */
+      virtual float_t getHeight();
+
+      /**
+       * Virtual method overridden by the UIElement to get the children of
+       * this component.
+       */
+      virtual std::vector<std::shared_ptr<UIElement>> getChildren();
+
+      /**
+       * Method called by the UICanvas to get the quads for this component.
+       * 
+       * @param ctx The canvas to add the quads to.
+       */
+      void getQuads(UICanvas &ctx);
+
+      /**
+       * Updates the alignment of this component based on the parent. Typically
+       * left to the UIAlignableElement to implement, default implementation
+       * does nothing but invoke children.
+       * 
+       * @param parentPosition The position of the parent.
+       * @param parentSize The size of the parent.
+       */
+      virtual void updateAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      );
+  };
+}

archive/ui/UIMenu.cpp

@@ -0,0 +1,50 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UIMenu.hpp"
+
+using namespace Dawn;
+
+void UIMenu::setPosition(int32_t x, int32_t y) {
+  assertTrue(x >= 0, "X position must be greater than or equal to 0.");
+  assertTrue(y >= 0, "Y position must be greater than or equal to 0.");
+  assertTrue(x < columns, "X must be less than the number of columns.");
+  assertTrue(y < rows, "Y must be less than the number of rows.");
+
+  if(this->x == x && this->y == y) return;
+
+  this->x = x;
+  this->y = y;
+
+  eventPositionChanged.emit(x, y);
+}
+
+void UIMenu::setSize(int32_t columns, int32_t rows) {
+  assertTrue(columns > 0, "Columns must be greater than 0.");
+  assertTrue(rows > 0, "Rows must be greater than 0.");
+  assertTrue(columns > x, "Columns must be greater than current x position.");
+  assertTrue(rows > y, "Rows must be greater than current y position.");
+
+  if(this->columns == columns && this->rows == rows) return;
+
+  this->columns = columns;
+  this->rows = rows;
+}
+
+int32_t UIMenu::getX() {
+  return x;
+}
+
+int32_t UIMenu::getY() {
+  return y;
+}
+
+int32_t UIMenu::getColumns() {
+  return columns;
+}
+
+int32_t UIMenu::getRows() {
+  return rows;
+}

archive/ui/UIMenu.hpp

@@ -0,0 +1,64 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/UIElement.hpp"
+
+namespace Dawn {
+  class UIMenu final : public UIElement {
+    private:
+      int32_t x = 0;
+      int32_t y = 0;
+      int32_t columns = 1;
+      int32_t rows = 1;
+
+    public:
+      Event<int32_t, int32_t> eventPositionChanged;
+
+      /**
+       * Sets the position of this menu.
+       * 
+       * @param x The x position of this menu.
+       * @param y The y position of this menu.
+       */
+      void setPosition(int32_t x, int32_t y);
+
+      /**
+       * Sets the size of this menu.
+       * 
+       * @param columns The number of columns in this menu.
+       * @param rows The number of rows in this menu.
+       */
+      void setSize(int32_t columns, int32_t rows);
+
+      /**
+       * Gets the x position of this menu.
+       * 
+       * @return The x position of this menu.
+       */
+      int32_t getX();
+
+      /**
+       * Gets the y position of this menu.
+       * 
+       * @return The y position of this menu.
+       */
+      int32_t getY();
+
+      /**
+       * Gets the number of columns in this menu.
+       * 
+       * @return The number of columns in this menu.
+       */
+      int32_t getColumns();
+
+      /**
+       * Gets the number of rows in this menu.
+       * 
+       * @return The number of rows in this menu.
+       */
+      int32_t getRows();
+  };
+}

archive/ui/UISubAlignableElement.cpp

@@ -0,0 +1,68 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UISubAlignableElement.hpp"
+
+using namespace Dawn;
+
+void UISubAlignableElement::updateAlignment(
+  const glm::vec2 parentPosition,
+  const glm::vec2 parentSize,
+  const float_t canvasScale
+) {
+  UIAlignableElement::updateAlignment(parentPosition, parentSize, canvasScale);
+  
+  switch(this->subAlignX) {
+    case UISubAlignment::START:
+      this->subAlignedPosition.x = this->position.x;
+      break;
+    
+    case UISubAlignment::MIDDLE:
+      this->subAlignedPosition.x = (
+        this->position.x +
+        (this->size.x / 2.0f) -
+        (this->getContentWidth() / 2.0f)
+      );
+      break;
+
+    case UISubAlignment::END:
+      this->subAlignedPosition.x = (
+        this->position.x +
+        this->size.x -
+        this->getContentWidth()
+      );
+      break;
+
+    default:
+      assertUnreachable("Unknown UISubAlignment!");
+  }
+
+  switch(this->subAlignY) {
+    case UISubAlignment::START:
+      this->subAlignedPosition.y = this->position.y;
+      break;
+    
+    case UISubAlignment::MIDDLE:
+      this->subAlignedPosition.y = (
+        this->position.y +
+        (this->size.y / 2.0f) -
+        (this->getContentHeight() / 2.0f)
+      );
+      break;
+
+    case UISubAlignment::END:
+      this->subAlignedPosition.y = (
+        this->position.y +
+        this->size.y -
+        this->getContentHeight()
+      );
+      break;
+
+    default:
+      assertUnreachable("Unknown UISubAlignment!");
+  }
+
+  this->eventSubAlignmentUpdated.emit(this->subAlignedPosition);
+}

archive/ui/UISubAlignableElement.hpp

@@ -0,0 +1,32 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/UIAlignableElement.hpp"
+
+namespace Dawn {
+  enum class UISubAlignment {
+    START,
+    MIDDLE,
+    END
+  };
+
+  class UISubAlignableElement : public UIAlignableElement {
+    protected:
+      glm::vec2 subAlignedPosition;
+
+    public:
+      Event<glm::vec2> eventSubAlignmentUpdated;
+
+      enum UISubAlignment subAlignX = UISubAlignment::START;
+      enum UISubAlignment subAlignY = UISubAlignment::START;
+
+      void updateAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      ) override;
+  };
+}

archive/ui/container/CMakeLists.txt

@@ -0,0 +1,12 @@
+# Copyright (c) 2023 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    UIColumnContainer.cpp
+    UIContainer.cpp
+    UIPaddingContainer.cpp
+    UIRowContainer.cpp
+)

archive/ui/container/UIColumnContainer.cpp

@@ -0,0 +1,36 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "assert/assert.hpp"
+#include "UIColumnContainer.hpp"
+
+using namespace Dawn;
+
+void UIColumnContainer::updateAlignment(
+  const glm::vec2 parentPosition,
+  const glm::vec2 parentSize,
+  const float_t canvasScale
+) {
+  this->updateSelfAlignment(parentPosition, parentSize, canvasScale);
+
+  // Now we have our dimensions, divide evenly
+  auto children = this->getChildren();
+
+  float_t x = 0.0f;
+  float_t xPiece = this->size.x / (float_t)children.size();
+  
+  // Update all children
+  for(auto &child : children) {
+    child->updateAlignment(
+      this->position + glm::vec2(x, 0),
+      glm::vec2(
+        xPiece,
+        this->size.y
+      ),
+      canvasScale
+    );
+    x += xPiece;
+  }
+}

archive/ui/container/UIColumnContainer.hpp

@@ -0,0 +1,18 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/container/UIContainer.hpp"
+
+namespace Dawn {
+  class UIColumnContainer final : public UIContainer {
+    public:
+      void updateAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      ) override;
+  };
+}

archive/ui/container/UIContainer.cpp

@@ -0,0 +1,47 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "assert/assert.hpp"
+#include "UIContainer.hpp"
+
+using namespace Dawn;
+
+std::vector<std::shared_ptr<UIElement>> UIContainer::getChildren() {
+  return this->children;
+}
+
+float_t UIContainer::getContentWidth() {
+  float_t width = 0;
+  auto children = this->getChildren();
+  for(auto child : children) {
+    width = Math::max(width, child->getWidth());
+  }
+  return width;
+}
+
+float_t UIContainer::getContentHeight() {
+  float_t height = 0;
+  auto children = this->getChildren();
+  for(auto child : children) {
+    height = Math::max(height, child->getHeight());
+  }
+  return height;
+}
+
+void UIContainer::appendChild(std::shared_ptr<UIElement> child) {
+  assertNotNull(child, "Cannot append a null child!");
+  this->children.push_back(child);
+}
+
+void UIContainer::removeChild(std::shared_ptr<UIElement> child) {
+  assertNotNull(child, "Cannot remove a null child!");
+  auto it = std::find(this->children.begin(), this->children.end(), child);
+  if(it == this->children.end()) return;
+  this->children.erase(it);
+}
+
+void UIContainer::clearChildren() {
+  this->children.clear();
+}

archive/ui/container/UIContainer.hpp

@@ -0,0 +1,39 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/UIAlignableElement.hpp"
+
+namespace Dawn {
+  class UIContainer : public UIAlignableElement {
+    private:
+      std::vector<std::shared_ptr<UIElement>> children;
+
+    public:
+      std::vector<std::shared_ptr<UIElement>> getChildren() override;
+
+      float_t getContentWidth() override;
+      float_t getContentHeight() override;
+      
+      /**
+       * Appends a child to this container.
+       * 
+       * @param child Child to append.
+       */
+      void appendChild(std::shared_ptr<UIElement> child);
+
+      /**
+       * Removes a child from this container.
+       * 
+       * @param child Child to remove.
+       */
+      void removeChild(std::shared_ptr<UIElement> child);
+
+      /**
+       * Removes all children from this container.
+       */
+      void clearChildren();
+  };
+}

archive/ui/container/UIPaddingContainer.cpp

@@ -0,0 +1,38 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UIPaddingContainer.hpp"
+
+using namespace Dawn;
+
+float_t UIPaddingContainer::getContentWidth() {
+  float_t width = 0.0f;
+  for(auto &child : getChildren()) {
+    width = Math::max(width, child->getWidth());
+  }
+  return width + padding.x + padding.z;
+}
+
+float_t UIPaddingContainer::getContentHeight() {
+  float_t height = 0.0f;
+  for(auto &child : getChildren()) {
+    height = Math::max(height, child->getHeight());
+  }
+  return height + padding.y + padding.w;
+}
+
+void UIPaddingContainer::updateAlignment(
+  const glm::vec2 parentPosition,
+  const glm::vec2 parentSize,
+  const float_t canvasScale
+) {
+  glm::vec2 childPosition = parentPosition + glm::vec2(padding.x, padding.y);
+  glm::vec2 childSize = parentSize - glm::vec2(padding.x + padding.z, padding.y + padding.w);
+
+  auto children = getChildren();
+  for(auto &child : children) {
+    child->updateAlignment(childPosition, childSize, canvasScale);
+  }
+}

archive/ui/container/UIPaddingContainer.hpp

@@ -0,0 +1,22 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/container/UIContainer.hpp"
+
+namespace Dawn {
+  class UIPaddingContainer final : public UIContainer {
+    public:
+      glm::vec4 padding = { 0, 0, 0, 0 };
+
+      float_t getContentWidth() override;
+      float_t getContentHeight() override;
+      void updateAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      ) override;
+  };
+}

archive/ui/container/UIRowContainer.cpp

@@ -0,0 +1,51 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UIRowContainer.hpp"
+
+using namespace Dawn;
+
+float_t UIRowContainer::getContentWidth() {
+  float_t width = 0.0f;
+  for(auto &child : this->getChildren()) {
+    width = Math::max(width, child->getWidth());
+  }
+  return width;
+}
+
+float_t UIRowContainer::getContentHeight() {
+  float_t height = 0.0f;
+  for(auto &child : this->getChildren()) {
+    height += child->getHeight();
+  }
+  return height;
+}
+
+void UIRowContainer::updateAlignment(
+  const glm::vec2 parentPosition,
+  const glm::vec2 parentSize,
+  const float_t canvasScale
+) {
+  this->updateSelfAlignment(parentPosition, parentSize, canvasScale);
+
+  // Now we have our dimensions, divide evenly
+  auto children = this->getChildren();
+
+  float_t y = 0.0f;
+  float_t yPiece = this->size.y / (float_t)children.size();
+  
+  // Update all children
+  for(auto &child : children) {
+    child->updateAlignment(
+      this->position + glm::vec2(0, y),
+      glm::vec2(
+        this->size.x,
+        yPiece
+      ),
+      canvasScale
+    );
+    y += yPiece;
+  }
+}

archive/ui/container/UIRowContainer.hpp

@@ -0,0 +1,20 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/container/UIContainer.hpp"
+
+namespace Dawn {
+  class UIRowContainer final : public UIContainer {
+    public:
+      float_t getContentWidth() override;
+      float_t getContentHeight() override;
+      void updateAlignment(
+        const glm::vec2 parentPosition,
+        const glm::vec2 parentSize,
+        const float_t canvasScale
+      ) override;
+  };
+}

archive/ui/elements/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2023 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    UILabel.cpp
+    UIRectangle.cpp
+)

archive/ui/elements/UILabel.cpp

@@ -0,0 +1,175 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UILabel.hpp"
+
+using namespace Dawn;
+
+void UILabel::getSelfQuads(UICanvas &ctx) {
+  std::vector<struct UIShaderQuad> quads;
+  if(this->texture == nullptr || this->text.empty()) return;
+
+  glm::vec4 quad;
+  glm::vec2 pos = glm::vec2(0, this->texture->fontSize);
+  bool_t lastCharWasSpace = false;
+
+  for(size_t i = 0; i < text.size(); i++) {
+    wchar_t c = text[i];
+    auto info = texture->getCharacterData(c);
+
+    // Newline(s)
+    if(c == L'\n') {
+      pos.x = 0;
+      pos.y += this->texture->fontSize;
+      continue;
+    }
+
+    // Spaces
+    if(c == L' ') {
+      pos.x += info.advance.x;
+      lastCharWasSpace = true;
+      continue;
+    }
+
+    // Word Wrap
+    if(wordWrap) {
+      if(lastCharWasSpace) {
+        // Scan ahead to next space
+        float_t wordWidth = pos.x;// Start at current position and scan ahead.
+        for(size_t j = i; j < text.size(); j++) {
+          wchar_t c2 = text[j];
+          if(c2 == L' ' || c2 == L'\n') {
+            break;// If we hit another space, we are OK.
+          }
+
+          // Will this character fit on the row? If not the whole word will wrap.
+          auto info2 = texture->getCharacterData(c);
+          wordWidth += info.advance.x;
+          if(wordWidth > size.x) {
+            pos.x = 0;
+            pos.y += this->texture->fontSize;
+            break;
+          }
+        }
+
+        lastCharWasSpace = false;
+      }
+    // } else if(pos.x + info.size.x > subAlignedPosition.x + size.x) {
+    //   // Not word wrap, but instead just overflow characters.
+    //   pos.x = 0;
+    //   pos.y += this->texture->fontSize;
+    }
+
+    ctx.addQuad(
+      {
+        subAlignedPosition.x + pos.x + info.offset.x,
+        subAlignedPosition.y + pos.y + info.offset.y,
+        subAlignedPosition.x + pos.x + info.size.x + info.offset.x,
+        subAlignedPosition.y + pos.y + info.size.y + info.offset.y
+      },
+      {
+        info.quad.x,
+        info.quad.y,
+        info.quad.z,
+        info.quad.w
+      },
+      this->color,
+      UIShaderQuadStyle::FONT,
+      texture->texture
+    );
+    pos += info.advance;
+  }
+}
+
+float_t UILabel::getContentWidth() {
+  if(this->texture == nullptr || this->text.empty()) return 0.0f;
+
+  float_t lineWidth = 0.0f;
+  float_t width = 0.0f;
+  for(wchar_t c : text) {
+    if(c == L'\n') {
+      width = Math::max<float_t>(width, lineWidth);
+      lineWidth = 0.0f;
+      continue;
+    }
+
+    auto info = texture->getCharacterData(c);
+    lineWidth += info.advance.x;
+    if(
+      this->hasExplicitWidth() &&
+      lineWidth >= size.x
+    ) return size.x;
+  }
+  width = Math::max<float_t>(width, lineWidth);
+  return width;
+}
+
+float_t UILabel::getContentHeight() {
+  if(this->texture == nullptr || this->text.empty()) return 0.0f;
+
+  float_t height = this->texture->fontSize;
+  float_t lineWidth = 0.0f;
+  bool_t lastCharWasSpace = false;
+
+  for(wchar_t c : text) {
+    if(c == L'\n') {
+      height += this->texture->fontSize;
+      continue;
+    }
+
+    auto info = texture->getCharacterData(c);
+
+    if(c == L' ') {
+      lineWidth += info.advance.x;
+      lastCharWasSpace = true;
+      continue;
+    }
+
+    if(wordWrap) {
+      if(lastCharWasSpace) {
+        // Scan ahead to next space
+        float_t wordWidth = lineWidth;// Start at current position and scan ahead.
+        for(size_t j = 0; j < text.size(); j++) {
+          wchar_t c2 = text[j];
+          if(c2 == L' ' || c2 == L'\n') {
+            break;// If we hit another space, we are OK.
+          }
+
+          // Will this character fit on the row? If not the whole word will wrap.
+          auto info2 = texture->getCharacterData(c);
+          wordWidth += info.advance.x;
+          if(wordWidth > size.x) {
+            height += this->texture->fontSize;
+            lineWidth = 0.0f;
+            break;
+          }
+        }
+
+        lastCharWasSpace = false;
+      }
+    // } else if(lineWidth + info.size.x > size.x) {
+    //   height += this->texture->fontSize;
+    //   lineWidth = 0.0f;
+    }
+  }
+
+  return height;
+}
+
+std::shared_ptr<TrueTypeTexture> UILabel::getFont() {
+  return this->texture;
+}
+
+std::wstring UILabel::getText() {
+  return this->text;
+}
+
+void UILabel::setFont(std::shared_ptr<TrueTypeTexture> texture) {
+  this->texture = texture;
+}
+
+void UILabel::setText(const std::wstring &text) {
+  this->text = text;
+}

archive/ui/elements/UILabel.hpp

@@ -0,0 +1,54 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/UISubAlignableElement.hpp"
+#include "display/font/TrueTypeTexture.hpp"
+
+namespace Dawn {
+  class UILabel final : public UISubAlignableElement {
+    private:
+      std::shared_ptr<TrueTypeTexture> texture = nullptr;
+      std::wstring text = L"Hello World";
+
+    protected:
+      void getSelfQuads(UICanvas &ctx) override;
+
+    public:
+      bool_t wordWrap = true;
+      struct Color color = COLOR_WHITE;
+
+      float_t getContentWidth() override;
+      float_t getContentHeight() override;
+
+      /**
+       * Returns the font used for this label.
+       * 
+       * @return The font used for this label.
+       */
+      std::shared_ptr<TrueTypeTexture> getFont();
+
+      /**
+       * Returns the text used for this label.
+       * 
+       * @return The text used for this label.
+       */
+      std::wstring getText();
+
+      /**
+       * Sets the font to use for this label.
+       * 
+       * @param texture TrueType texture to use for this label.
+       */
+      void setFont(std::shared_ptr<TrueTypeTexture> texture);
+
+      /**
+       * Sets the text to use for this label.
+       * 
+       * @param text The text to use for this label.
+       */
+      void setText(const std::wstring &text);
+  };
+}

archive/ui/elements/UIRectangle.cpp

@@ -0,0 +1,19 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "UIRectangle.hpp"
+
+using namespace Dawn;
+
+void UIRectangle::getSelfQuads(UICanvas &ctx) {
+  std::vector<struct UIShaderQuad> quads;
+  ctx.addQuad(
+    glm::vec4(position, position + size),
+    uv,
+    color,
+    UIShaderQuadStyle::TEXTURED,
+    texture
+  );
+}

archive/ui/elements/UIRectangle.hpp

@@ -0,0 +1,19 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "ui/UIAlignableElement.hpp"
+
+namespace Dawn {
+  class UIRectangle final : public UIAlignableElement {
+    protected:
+      void getSelfQuads(UICanvas &ctx) override;
+
+    public:
+      struct Color color = COLOR_WHITE;
+      std::shared_ptr<Texture> texture = nullptr;
+      glm::vec4 uv = glm::vec4(0,0,1,1);
+  };
+}