Reorganize files and add Mandelbrot shader

src/main.c

@@ -0,0 +1,81 @@
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+#include <stdlib.h>
+
+#include "log.h"
+#include "renderer.h"
+#include "shaders.h"
+
+#define WINDOW_WIDTH 800
+#define WINDOW_HEIGHT 800
+
+int main(int argc, char *argv[]) {
+  if (argc < 2) {
+    log_error("Usage: %s <fragment shader>", argv[0]);
+    return EXIT_FAILURE;
+  }
+  const char *fragment_shader_file = argv[1];
+
+  GLFWwindow *window = initialize_window(WINDOW_WIDTH, WINDOW_HEIGHT);
+  if (window == NULL) {
+    glfwTerminate();
+    return EXIT_FAILURE;
+  }
+
+  unsigned int VAO = initialize_vertices();
+
+  unsigned int shader_program = glCreateProgram();
+  if (!shader_program) {
+    log_error("Could not create shader program");
+    glfwDestroyWindow(window);
+    glfwTerminate();
+    return EXIT_FAILURE;
+  }
+  compile_shaders(&shader_program, fragment_shader_file);
+
+  /* Drawing loop */
+  size_t frame = 0;
+  while (!glfwWindowShouldClose(window)) {
+    process_input(window, &shader_program, fragment_shader_file);
+
+    /* Background */
+    glClearColor(0, 0, 0, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    glUseProgram(shader_program);
+
+    /* Setup uniforms */
+    float time = glfwGetTime();
+    int frag_time_location = glGetUniformLocation(shader_program, "u_time");
+    glUniform1f(frag_time_location, time);
+
+    int frag_frame_location = glGetUniformLocation(shader_program, "u_frame");
+    glUniform1ui(frag_frame_location, frame);
+
+    int viewport[4] = {0};
+    glGetIntegerv(GL_VIEWPORT, viewport);
+    int frag_resolution_location =
+        glGetUniformLocation(shader_program, "u_resolution");
+    glUniform2f(frag_resolution_location, viewport[2], viewport[3]);
+
+    double mouse_x = 0, mouse_y = 0;
+    glfwGetCursorPos(window, &mouse_x, &mouse_y);
+    int frag_mouse_resolution_location =
+        glGetUniformLocation(shader_program, "u_mouse");
+    glUniform2f(frag_mouse_resolution_location, mouse_x, mouse_y);
+
+    /* Draw the vertices */
+    // glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); /* For wireframe mode */
+    glBindVertexArray(VAO);
+    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+    glBindVertexArray(0);
+
+    glfwSwapBuffers(window);
+    glfwPollEvents();
+    frame++;
+  }
+
+  glfwDestroyWindow(window);
+  glfwTerminate();
+  return EXIT_SUCCESS;
+}