1 files changed, 114 insertions, 0 deletions
diff --git a/src/fw/fw.odin b/src/fw/fw.odin
new file mode 100644
index 0000000..86a3e3a
--- /dev/null
+++ b/src/fw/fw.odin
@@ -0,0 +1,114 @@
+package fw
+
+import "core:log"
+
+import "vendor:glfw"
+
+Vec2 :: [2]f32
+Vec2i :: [2]i32
+Vec3 :: [3]f32
+Vec4 :: [4]f32
+Color :: [4]f32
+Mat4 :: matrix[4, 4]f32
+
+Rect :: struct {
+  start: Vec2,
+  size: Vec2,
+}
+
+Config :: struct {
+  win_name: cstring,
+  win_size: Vec2i,
+  screen_size: Vec2i,
+  renderer_backend: Renderer_Backend,
+}
+
+@(private) window: glfw.WindowHandle
+@(private) last_frame: f64
+@(private) dt: f64
+
+rgba8 :: proc(r: u8, g: u8, b: u8, a: u8 = 255) -> Color {
+  return Color{
+    f32(r) / 255,
+    f32(g) / 255,
+    f32(b) / 255,
+    f32(a) / 255,
+  }
+}
+
+init :: proc(config: Config) {
+  if !glfw.Init() {
+    panic("could not init glfw window")
+  }
+
+  glfw.WindowHint(glfw.CONTEXT_VERSION_MAJOR, 3)
+	glfw.WindowHint(glfw.CONTEXT_VERSION_MINOR, 3)
+  glfw.WindowHint(glfw.RESIZABLE, false)
+	glfw.WindowHint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
+
+  window = glfw.CreateWindow(
+    config.win_size.x,
+    config.win_size.y,
+    config.win_name,
+    nil,
+    nil,
+  )
+
+  if window == nil {
+    panic("could not create glfw window")
+  }
+
+  glfw.SwapInterval(1)
+
+  _renderer_init(config)
+}
+
+deinit :: proc() {
+  _renderer_deinit()
+
+  glfw.DestroyWindow(window)
+  glfw.Terminate()
+}
+
+next_frame :: proc() -> bool {
+  // End the previous frame
+  if can_flush() {
+    flush_batch(&renderer.draw_call)
+    new_batch(renderer.white_1x1.handle, .None, false)
+  }
+
+  renderer.vt.end_frame()
+  new_batch(renderer.white_1x1.handle, .None, false)
+
+  renderer.draw_calls_count = renderer._draw_call_counter
+  renderer._draw_call_counter = 0
+
+  glfw.SwapBuffers(window)
+  glfw.PollEvents()
+  _update_input()
+
+  // log.debugf("Draw calls: %v", renderer.draw_calls_count)
+
+  // Begin next frame
+
+  time := get_time()
+  dt = time - last_frame
+  last_frame = time
+
+  renderer.vt.clear({0, 0, 0, 1})
+
+  renderer.vt.start_frame()
+  renderer.vt.clear(renderer.bg_col)
+
+  return !bool(glfw.WindowShouldClose(window))
+}
+
+@(require_results)
+get_time :: #force_inline proc() -> f64 {
+  return glfw.GetTime()
+}
+
+@(require_results)
+get_delta_time :: #force_inline proc() -> f64 {
+  return dt
+}