wip extract to files

src/window.c

@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <linmath.h>
+
+#include "config.h"
+#include "glfw.h"
+#include "types.h"
+
+// TODO split into smaller functions
+// TODO custom struct to remove glfw in signature
+void *init_window(Window **window, Parameters params,
+                  void (*error_callback)(int, const char *),
+                  void (*key_callback)(Window *, int, int, int, int)) {
+  // set errors handler
+  glfwSetErrorCallback(error_callback);
+
+  // print current GLFW version
+  fprintf(stdout, "[GLFW] %s\n", glfwGetVersionString());
+
+  // init GLFW
+  if (!glfwInit()) {
+    fprintf(stderr, "[GLFW] Initialization failed\n");
+    exit(EXIT_FAILURE);
+  }
+
+  // add context to window before creation
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+  glfwWindowHint(GLFW_DECORATED, 0);
+
+  // detect monitors
+  int count;
+  GLFWmonitor **monitors = glfwGetMonitors(&count);
+
+  // check selected monitor availability
+  if (params.screen >= count) {
+    fprintf(stderr, "Screen %d is out of range [0-%d]\n", params.screen,
+            count - 1);
+    glfwTerminate();
+    exit(EXIT_FAILURE);
+  }
+
+  // create fullscreen window in selected monitor
+  (*window) = glfwCreateWindow(1, 1, PACKAGE " " VERSION,
+                               monitors[params.screen], NULL);
+
+  // handle window creation fail
+  if (!(*window)) {
+    fprintf(stderr, "[GLFW] Window or context creation failed\n");
+    glfwTerminate();
+    exit(EXIT_FAILURE);
+  }
+
+  // use current window
+  glfwMakeContextCurrent((*window));
+  // link GLAD and GLFW window
+  gladLoadGL(glfwGetProcAddress);
+  // set keyboard handler
+  glfwSetKeyCallback((*window), key_callback);
+  // hide cursor
+  glfwSetInputMode((*window), GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
+  // vsync
+  glfwSwapInterval(1);
+
+  return window;
+}