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#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
#define GL_SILENCE_DEPRECATION 1
int main() {
// Initialize GLFW
if (!glfwInit()) {
return -1;
}
// Set the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // Required on Mac
// Create a windowed mode window and its OpenGL context
GLFWwindow *window = glfwCreateWindow(800, 600, "Blue screen", NULL, NULL);
if (!window) {
glfwTerminate();
return -1;
}
glfwMakeContextCurrent(window);
float vertices[6] = {-0.5f, -0.5f, 0.0f, 0.5f, 0.5f, -0.5f};
unsigned int VBO;
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
const char *vertex_shader_src =
"#version 330 core\n"
"layout (location = 0) in vec3 aPos;\n"
"void main()\n"
"{\n"
" gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
"}\0";
unsigned int vertex_shader;
vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertex_shader, 1, &vertex_shader_src, NULL);
glCompileShader(vertex_shader);
int success;
char info_log[512];
glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(vertex_shader, 512, NULL, info_log);
printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED %s\n", info_log);
}
const char *fragment_shader_src =
"#version 330 core\n"
"out vec4 FragColor;\n"
"void main()\n"
"{\n"
" FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
"}\0";
unsigned int fragment_shader;
fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragment_shader, 1, &fragment_shader_src, NULL);
glCompileShader(fragment_shader);
glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(fragment_shader, 512, NULL, info_log);
printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED %s\n", info_log);
}
unsigned int shader_program;
shader_program = glCreateProgram();
while (!glfwWindowShouldClose(window)) {
glClearColor(0.1f, 0.1f, 0.25f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
return 0;
}
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