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#include <KHR/khrplatform.h>
#define GLFW_INCLUDE_NONE
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <GL/gl.h>
#include <stdio.h>
// struct and function declaration
// ----------------------------------------------------------------------------
void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void processInput(GLFWwindow* window);
// ----------------------------------------------------------------------------
// END
int main(void) {
// GLFW settings init and which version of opengl we should use
// and which subset of opengl profiles
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 4);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
// Window settings
// create window
int w_height = 1280;
int w_width = 820;
GLFWwindow* window = glfwCreateWindow(w_height, w_width, "Test", NULL, NULL);
if (window == NULL) {
printf("Failed to create GLFW window\n");
glfwTerminate();
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
return -1;
}
// init window
glfwMakeContextCurrent(window);
// init GLAD
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
printf("Failed to initialize GLAD\n");
return -1;
}
// opengl viewport
framebuffer_size_callback(window, w_width, w_height);
// -------------------------------------------------------------------------
// render loop
// -------------------------------------------------------------------------
while (!glfwWindowShouldClose(window)) {
// input
processInput(window);
// rendering commands here
// -----------------------
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
// check and call events and swap the buffers
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
return 0;
}
// END render loop
// -----------------------------------------------------------------------------
// Functions
// -----------------------------------------------------------------------------
// glfw: whenever the window size changed (by OS or user resize) this callback function executes
// ---------------------------------------------------------------------------------------------
void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
glViewport(0, 0, width, height);
}
// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
// ---------------------------------------------------------------------------------------------------------
void processInput(GLFWwindow* window) {
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) glfwSetWindowShouldClose(window, 1);
if (glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS) glfwSetWindowShouldClose(window, 1);
}
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