# Copyright 2018, NimGL contributors.

import nimgl/imgui, nimgl/imgui/[impl_opengl, impl_glfw]

import nimgl/[opengl, glfw]

proc main() =

doAssert glfwInit()

glfwWindowHint(GLFWContextVersionMajor, 3)

glfwWindowHint(GLFWContextVersionMinor, 3)

glfwWindowHint(GLFWOpenglForwardCompat, GLFW_TRUE)

glfwWindowHint(GLFWOpenglProfile, GLFW_OPENGL_CORE_PROFILE)

glfwWindowHint(GLFWResizable, GLFW_FALSE)

var w: GLFWWindow = glfwCreateWindow(1280, 720)

if w == nil:

quit(-1)

w.makeContextCurrent()

doAssert glInit()

let context = igCreateContext()

#let io = igGetIO()

doAssert igGlfwInitForOpenGL(w, true)

doAssert igOpenGL3Init()

igStyleColorsCherry()

var show_demo: bool = true

var somefloat: float32 = 0.0f

var counter: int32 = 0

while not w.windowShouldClose:

glfwPollEvents()

igOpenGL3NewFrame()

igGlfwNewFrame()

igNewFrame()

if show_demo:

igShowDemoWindow(show_demo.addr)

# Simple window

igBegin("Hello, world!")

igText("This is some useful text.")

igCheckbox("Demo Window", show_demo.addr)

igSliderFloat("float", somefloat.addr, 0.0f, 1.0f)

if igButton("Button", ImVec2(x: 0, y: 0)):

counter.inc

igSameLine()

igText("counter = %d", counter)

igText("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / igGetIO().framerate, igGetIO().framerate)

igEnd()

# End simple window

igRender()

glClearColor(0.45f, 0.55f, 0.60f, 1.00f)

glClear(GL_COLOR_BUFFER_BIT)

igOpenGL3RenderDrawData(igGetDrawData())

w.swapBuffers()

igOpenGL3Shutdown()

igGlfwShutdown()

context.igDestroyContext()

w.destroyWindow()

glfwTerminate()

main()