Initial commit

.clang-format

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+BasedOnStyle: LLVM
+IndentWidth: 4 
+TabWidth: 4 
+UseTab: Never

.gitignore

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+/build

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5.0)
+project(opengl_project VERSION 0.1.0 LANGUAGES C CXX)
+cmake_policy(SET CMP0072 NEW)
+
+find_package(OpenGL REQUIRED)
+
+add_executable(
+    opengl_project
+    src/main.cpp
+    src/glad/glad.c
+    src/glad/glad.h
+    src/stb/stb_image.h 
+    src/stb/stb.cpp
+    src/shaders/fragmentShader.frag.glsl
+    src/shaders/vertexShader.vert.glsl
+    src/classes/Classes.h
+    src/classes/Shader.h
+    src/classes/Shader.cpp
+    src/classes/debug.cpp
+    src/classes/debug.h
+    src/classes/ElementBufferObject.h 
+    src/classes/ElementBufferObject.cpp
+    src/classes/VertexArrayObject.h 
+    src/classes/VertexArrayObject.cpp
+    src/classes/VertexBufferObject.h 
+    src/classes/VertexBufferObject.cpp
+    src/classes/Texture.h 
+    src/classes/Texture.cpp
+)
+
+target_link_libraries(opengl_project glfw OpenGL::GL)

README.md

@@ -0,0 +1,5 @@
+# OpenGL-Template
+This is a template I will use for OpenGL projects.
+
+It contains classes that made my experience easier in OpenGL.
+This template just provides you with a black window. 

src/classes/Classes.h

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+#include "ElementBufferObject.h"
+#include "Shader.h"
+#include "Texture.h"
+#include "VertexArrayObject.h"
+#include "VertexBufferObject.h"
+#include "debug.h"

src/classes/ElementBufferObject.cpp

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+#include "ElementBufferObject.h"
+
+ElementBufferObject::ElementBufferObject(unsigned int *indices,
+                                         GLsizeiptr size) {
+    glGenBuffers(1, &ID);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ID);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, indices, GL_STATIC_DRAW);
+}
+
+void ElementBufferObject::Bind() { glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ID); }
+
+void ElementBufferObject::Unbind() { glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); }
+
+void ElementBufferObject::Delete() { glDeleteBuffers(1, &ID); }

src/classes/ElementBufferObject.h

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+#ifndef ELEMENT_BUFFER_OBJECT_H
+#define ELEMENT_BUFFER_OBJECT_H
+
+#include "../glad/glad.h"
+
+class ElementBufferObject {
+  public:
+    // ID reference of the Elements Buffer Object.
+    unsigned int ID;
+
+    // Constructor that generates EBO and links it to indices.
+    ElementBufferObject(unsigned int *indices, GLsizeiptr size);
+
+    // Binds the EBO.
+    void Bind();
+
+    // Unbinds the EBO.
+    void Unbind();
+
+    // Deletes the EBO.
+    void Delete();
+};
+
+#endif

src/classes/Shader.cpp

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+#include "Shader.h"
+#include "debug.h"
+#include <fstream>
+#include <ostream>
+#include <sstream>
+
+using namespace std;
+
+Shader::Shader(const char *vertexPath, const char *fragmentPath) {
+    // Retreive the vertex/fragment source code from the filepath.
+    string vertexCode;
+    string fragmentCode;
+    ifstream vertexShaderFile;
+    ifstream fragmentShaderFile;
+
+    // Ensure ifstream objects can throw exceptions.
+    vertexShaderFile.exceptions(ifstream::failbit | ifstream::badbit);
+    fragmentShaderFile.exceptions(ifstream::failbit | ifstream::badbit);
+
+    try {
+        // Open files.
+        LogInfo("Opening files.");
+
+        vertexShaderFile.open(vertexPath);
+        LogInfo(vertexShaderFile.is_open() ? "true" : "false");
+        fragmentShaderFile.open(fragmentPath);
+        LogInfo(fragmentShaderFile.is_open() ? "true" : "false");
+
+        stringstream vertexShaderStream;
+        stringstream fragmentShaderStream;
+
+        // Read file's buffer contents into streams.
+        LogInfo("Reading file contents into streams.");
+        vertexShaderStream << vertexShaderFile.rdbuf();
+        fragmentShaderStream << fragmentShaderFile.rdbuf();
+
+        // Close the file handlers.
+        LogInfo("Closing file handles.");
+        vertexShaderFile.close();
+        fragmentShaderFile.close();
+
+        // Convert the stream into string.
+        LogInfo("Converting the stream into string.");
+        vertexCode = vertexShaderStream.str();
+        fragmentCode = fragmentShaderStream.str();
+
+    } catch (std::ifstream::failure e) {
+        cout << "ERROR::SHADER::FILE_NOT_SUCCESFULLY_READ:\n"
+             << "what - " << e.what() << "\n"
+             << "code - " << e.code() << endl;
+    }
+
+    // Compile Shaders.
+    const char *vertexShaderCode = vertexCode.c_str();
+    const char *fragmentShaderCode = fragmentCode.c_str();
+    unsigned int vertex, fragment;
+
+    // Vertex shader.
+    vertex = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vertex, 1, &vertexShaderCode, NULL);
+    glCompileShader(vertex);
+    checkCompileErrors(vertex, "VERTEX");
+
+    // Fragment Shaders.
+    fragment = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fragment, 1, &fragmentShaderCode, NULL);
+    glCompileShader(fragment);
+    checkCompileErrors(fragment, "FRAGMENT");
+
+    // Shader Program.
+    ID = glCreateProgram();
+    glAttachShader(ID, vertex);
+    glAttachShader(ID, fragment);
+    glLinkProgram(ID);
+    checkCompileErrors(ID, "PROGRAM");
+
+    // Shaders no longer needed after linking.
+    glDeleteShader(vertex);
+    glDeleteShader(fragment);
+}
+
+void Shader::Activate() { glUseProgram(ID); }
+
+void Shader::Delete() { glDeleteProgram(ID); }
+
+void Shader::setBool(const string &name, bool value) const {
+    glUniform1i(glGetUniformLocation(ID, name.c_str()), (int)value);
+}
+
+void Shader::setInt(const string &name, int value) const {
+    glUniform1i(glGetUniformLocation(ID, name.c_str()), value);
+}
+
+void Shader::setFloat(const string &name, float value) const {
+    glUniform1i(glGetUniformLocation(ID, name.c_str()), value);
+}
+
+void Shader::checkCompileErrors(unsigned int shader, string type) {
+    int success;
+    char infoLog[1024];
+    if (type != "PROGRAM") {
+        glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+        if (!success) {
+            glGetShaderInfoLog(shader, 1024, NULL, infoLog);
+            cout << "ERROR::SHADER_COMPILATION_ERROR of type: " << type << "\n"
+                 << infoLog
+                 << "\n -- --------------------------------------------------- "
+                    "-- "
+                 << endl;
+        }
+    } else {
+        glGetProgramiv(shader, GL_LINK_STATUS, &success);
+        if (!success) {
+            glGetProgramInfoLog(shader, 1024, NULL, infoLog);
+            cout << "ERROR::PROGRAM_LINKING_ERROR of type: " << type << "\n"
+                 << infoLog
+                 << "\n -- --------------------------------------------------- "
+                    "-- "
+                 << endl;
+        }
+    }
+}

src/classes/Shader.h

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+#ifndef SHADER_H
+#define SHADER_H
+
+#include "../glad/glad.h"
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+class Shader {
+  public:
+    // The Program ID.
+    unsigned int ID;
+
+    // Constructor that reads and builds the shader.
+    Shader(const char *vertexPath, const char *fragmentPath);
+
+    // Use or activate the shader.
+    void Activate();
+
+    // Deactivate or delete the shader.
+    void Delete();
+
+    // Utility uniform functions.
+    void setBool(const std::string &name, bool value) const;
+    void setInt(const std::string &name, int value) const;
+    void setFloat(const std::string &name, float value) const;
+
+  private:
+    // Error checking.
+    void checkCompileErrors(unsigned int shader, std::string type);
+};
+
+#endif

src/classes/Texture.cpp

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+#include "Texture.h"
+#include "Shader.h"
+
+Texture::Texture(const char *image, GLenum textureType, GLenum slot,
+                 GLenum format, GLenum pixelType) {
+    type = textureType;
+
+    int imageWidth;
+    int imageHeight;
+    int numberOfColourChannels;
+
+    // Flips the image so it appears right side up.
+    stbi_set_flip_vertically_on_load(true);
+
+    // Reads the image from a file and stores it in bytes.
+    unsigned char *bytes =
+        stbi_load(image, &imageWidth, &imageHeight, &numberOfColourChannels, 0);
+
+    glGenTextures(1, &ID);
+    glActiveTexture(slot);
+    glBindTexture(textureType, ID);
+
+    // Set the texture wrapping/filtering options.
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                    GL_LINEAR_MIPMAP_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    // Assigns the image to the OpenGL Texture object.
+    glTexImage2D(textureType, 0, GL_RGBA, imageWidth, imageHeight, 0, format,
+                 pixelType, bytes);
+    glGenerateMipmap(textureType);
+
+    // Delete the image data because it is already in the OpenGL Texture object.
+    stbi_image_free(bytes);
+
+    // Unbinds the OpenGL Texture object so that it can't be modified
+    // accidentally.
+    glBindTexture(textureType, 0);
+}
+
+void Texture::textureUnit(Shader &shader, const char *uniform,
+                          unsigned int unit) {
+    unsigned int textureUnit = glGetUniformLocation(shader.ID, uniform);
+    shader.Activate();
+    glUniform1i(textureUnit, unit);
+}
+
+void Texture::Bind() { glBindTexture(type, ID); }
+
+void Texture::Unbind() { glBindTexture(type, 0); }
+
+void Texture::Delete() { glDeleteTextures(1, &ID); }

src/classes/Texture.h

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+#ifndef TEXTURE_CLASS_H
+#define TEXTURE_CLASS_H
+
+#include "Shader.h"
+#include "../glad/glad.h"
+#include "../stb/stb_image.h"
+
+class Texture {
+  public:
+    unsigned int ID;
+    GLenum type;
+
+    // Constructor for the Texture.
+    Texture(const char *image, GLenum textureType, GLenum slot, GLenum format,
+            GLenum pixelType);
+
+    // Assigns a texture unit to a texture.
+    void textureUnit(Shader &shader, const char *uniform, unsigned int unit);
+
+    // Binds a texture.
+    void Bind();
+
+    // Unbinds a texture.
+    void Unbind();
+
+    // Deletes a texture.
+    void Delete();
+};
+
+#endif

src/classes/VertexArrayObject.cpp

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+#include "VertexArrayObject.h"
+#include "VertexBufferObject.h"
+
+VertexArrayObject::VertexArrayObject() { glGenVertexArrays(1, &ID); }
+
+void VertexArrayObject::LinkVBO(VertexBufferObject &VBO, unsigned int layout) {
+    VBO.Bind();
+    glVertexAttribPointer(layout, 3, GL_FLOAT, GL_FALSE, 0, (void *)0);
+    glEnableVertexAttribArray(layout);
+    VBO.Unbind();
+}
+
+void VertexArrayObject::LinkAttrib(VertexBufferObject &VBO, unsigned int layout,
+                                   unsigned int numComponents, GLenum type,
+                                   GLsizeiptr stride, void *offset) {
+    VBO.Bind();
+    glVertexAttribPointer(layout, numComponents, type, GL_FALSE, stride,
+                          offset);
+    glEnableVertexAttribArray(layout);
+    VBO.Unbind();
+}
+
+void VertexArrayObject::Bind() { glBindVertexArray(ID); }
+
+void VertexArrayObject::Unbind() { glBindVertexArray(0); }
+
+void VertexArrayObject::Delete() { glDeleteVertexArrays(1, &ID); }

src/classes/VertexArrayObject.h

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+#ifndef VERTEX_ARRAY_OBJECT_H
+#define VERTEX_ARRAY_OBJECT_H
+
+#include "VertexBufferObject.h"
+#include "../glad/glad.h"
+
+class VertexArrayObject {
+  public:
+    // ID reference for the VAO.
+    unsigned int ID;
+
+    // Constructor that generates VAO ID.
+    VertexArrayObject();
+
+    // Links a VBO to the VAO using a certain layout.
+    void LinkVBO(VertexBufferObject &VBO, unsigned int layout);
+
+    // Links a VBO attribute to the VAO. 
+    void LinkAttrib(VertexBufferObject& VBO, unsigned int layout, unsigned int numComponents, GLenum type, GLsizeiptr stride, void* offset);
+
+    // Bind the VAO.
+    void Bind();
+
+    // Unbinds the VAO.
+    void Unbind();
+
+    // Deletes the VAO.
+    void Delete();
+};
+
+#endif

src/classes/VertexBufferObject.cpp

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+#include "VertexBufferObject.h"
+
+VertexBufferObject::VertexBufferObject(GLfloat *vertices, GLsizeiptr size) {
+    glGenBuffers(1, &ID);
+    glBindBuffer(GL_ARRAY_BUFFER, ID);
+    glBufferData(GL_ARRAY_BUFFER, size, vertices, GL_STATIC_DRAW);
+}
+
+void VertexBufferObject::Bind() { glBindBuffer(GL_ARRAY_BUFFER, ID); }
+
+void VertexBufferObject::Unbind() { glBindBuffer(GL_ARRAY_BUFFER, 0); }
+
+void VertexBufferObject::Delete() { glDeleteBuffers(1, &ID); }

src/classes/VertexBufferObject.h

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+#ifndef VERTEX_BUFFER_OBJECT
+#define VERTEX_BUFFER_OBJECT
+
+#include "../glad/glad.h"
+
+class VertexBufferObject {
+  public:
+    // Reference ID of the Vertex Buffer Object.
+    unsigned int ID;
+
+    // Constructor that generates a Vertex Buffer Object and links it to
+    // vertices.
+    VertexBufferObject(GLfloat *vertices, GLsizeiptr size);
+
+    // Binds the VBO.
+    void Bind();
+
+    // Unbinds the VBO.
+    void Unbind();
+
+    // Deletes the VBO.
+    void Delete();
+};
+
+#endif

src/classes/debug.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+void LogInfo(const char *msg)
+{
+    std::cout<< msg << std::endl;
+}

src/classes/debug.h

@@ -0,0 +1,8 @@
+#ifndef DEBUG_H
+#define DEBUG_H
+
+#include <iostream>
+
+void LogInfo(const char *msg);
+
+#endif

src/glad/khrplatform.h

@@ -0,0 +1,311 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+/*
+ * To support platform where unsigned long cannot be used interchangeably with
+ * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
+ * Ideally, we could just use (u)intptr_t everywhere, but this could result in
+ * ABI breakage if khronos_uintptr_t is changed from unsigned long to
+ * unsigned long long or similar (this results in different C++ name mangling).
+ * To avoid changes for existing platforms, we restrict usage of intptr_t to
+ * platforms where the size of a pointer is larger than the size of long.
+ */
+#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
+#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
+#define KHRONOS_USE_INTPTR_T
+#endif
+#endif
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef KHRONOS_USE_INTPTR_T
+typedef intptr_t               khronos_intptr_t;
+typedef uintptr_t              khronos_uintptr_t;
+#elif defined(_WIN64)
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+#endif
+
+#if defined(_WIN64)
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */

src/main.cpp

@@ -0,0 +1,63 @@
+/*
+* This template contains code for creating an empty 
+* window in OpenGL. 
+*/
+
+#include "glad/glad.h"
+#include "GLFW/glfw3.h"
+#include "classes/Classes.h"
+
+// Prototypes. 
+void framebuffer_size_callback(GLFWwindow *window, int width, int height);
+void processInput(GLFWwindow *window);
+
+// Constants. 
+const unsigned int WINDOW_WIDTH = 800;
+const unsigned int WINDOW_HEIGHT = 600;
+
+int main(void) {
+    // Initialisation and configuration. 
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    // Create window. 
+    GLFWwindow *window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "OpenGL_Project", NULL, NULL);
+    if (window == NULL) {
+        LogInfo("Failed to create GLFW window.");
+        glfwTerminate();
+        return -1;
+    }
+
+    glfwMakeContextCurrent(window);
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
+        LogInfo("Failed to initialise GLAD."); 
+        return -1;
+    }
+
+    while (!glfwWindowShouldClose(window)) {
+        processInput(window);
+
+        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+
+    glfwDestroyWindow(window);
+    glfwTerminate();
+    return 0;
+}
+
+void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
+    glViewport(0, 0, width, height);
+}
+
+void processInput(GLFWwindow *window) {
+    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
+        glfwSetWindowShouldClose(window, true);
+    }
+}

src/stb/stb.cpp

@@ -0,0 +1,2 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"