add overridable update() and draw() callbacks

1 files changed, 66 insertions, 0 deletions

diff --git a/src/honey.c b/src/honey.c
new file mode 100644
index 0000000..c55ddc2
--- /dev/null
+++ b/src/honey.c
@@ -0,0 +1,66 @@
+#include "include/honey.h"
+
+static void default_honey_update_callback(float dt) {}
+static void default_honey_draw_callback() {}
+
+honey_window honey_setup(int screen_width, int screen_height, char* window_title) {
+  honey_update_callback = &default_honey_update_callback;
+  honey_draw_callback = &default_honey_draw_callback;
+  
+  glfwInit();
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+  honey_window window = glfwCreateWindow(screen_width, screen_height, window_title, NULL, NULL);
+  if (window == NULL) {
+    fprintf(stderr, "ERROR: failed to create window!\n");
+    glfwTerminate();
+    return NULL;
+  }
+
+  glfwMakeContextCurrent(window);
+  glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+  if (!gladLoadGLLoader((GLADloadproc) glfwGetProcAddress)) {
+    fprintf(stderr, "ERROR: failed to initialize GLAD!\n");
+    glfwTerminate();
+    return NULL;
+  }
+
+  return window;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void honey_set_update_callback(void (*update_callback)(float)) {
+  honey_update_callback = update_callback;
+}
+
+void honey_set_draw_callback(void (*draw_callback)()) {
+  honey_draw_callback = draw_callback;
+}
+
+void honey_set_fps(unsigned int fps) {
+  honey_draw_dt = 1.0f / fps;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void honey_run(honey_window window) {
+  float prevTime = 0;
+  float currentTime = 0;
+  float dt;
+  float draw_dt = 0;
+
+  while(!glfwWindowShouldClose(window)) {
+    currentTime = (float) glfwGetTime();
+    dt = currentTime - prevTime;
+    prevTime = currentTime;
+
+    honey_update_callback(dt);
+    honey_draw_callback();
+  }
+}
+    
+