#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import absolute_import
import sys
backend = "pygame"
if "sdl2" in sys.argv:
backend = "sdl2"
elif "pygame" in sys.argv:
backend = "pygame"
elif "glfw" in sys.argv:
backend = "glfw"
elif "cocos2d" in sys.argv:
backend = "cocos2d"
sys.stderr.write("%s backend selected\n" % backend)
if backend == "sdl2":
from sdl2 import *
import ctypes
from imgui.integrations.sdl2 import SDL2Renderer
elif backend == "pygame":
import pygame
from imgui.integrations.pygame import PygameRenderer
elif backend == "glfw":
import glfw
from imgui.integrations.glfw import GlfwRenderer
elif backend == "cocos2d":
import cocos
from cocos.director import director
from imgui.integrations.cocos2d import ImguiLayer
import OpenGL.GL as gl
import imgui
def main_sdl2():
def pysdl2_init():
width, height = 1280, 720
window_name = "minimal ImGui/SDL2 example"
if SDL_Init(SDL_INIT_EVERYTHING) < 0:
print("Error: SDL could not initialize! SDL Error: " + SDL_GetError())
exit(1)
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1)
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24)
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8)
SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1)
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1)
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 16)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE)
SDL_SetHint(SDL_HINT_MAC_CTRL_CLICK_EMULATE_RIGHT_CLICK, b"1")
SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, b"1")
window = SDL_CreateWindow(window_name.encode('utf-8'),
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
width, height,
SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE)
if window is None:
print("Error: Window could not be created! SDL Error: " + SDL_GetError())
exit(1)
gl_context = SDL_GL_CreateContext(window)
if gl_context is None:
print("Error: Cannot create OpenGL Context! SDL Error: " + SDL_GetError())
exit(1)
SDL_GL_MakeCurrent(window, gl_context)
if SDL_GL_SetSwapInterval(1) < 0:
print("Warning: Unable to set VSync! SDL Error: " + SDL_GetError())
exit(1)
return window, gl_context
window, gl_context = pysdl2_init()
renderer = SDL2Renderer(window)
running = True
event = SDL_Event()
while running:
while SDL_PollEvent(ctypes.byref(event)) != 0:
if event.type == SDL_QUIT:
running = False
break
renderer.process_event(event)
renderer.process_inputs()
imgui.new_frame()
on_frame()
gl.glClearColor(1., 1., 1., 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
imgui.render()
SDL_GL_SwapWindow(window)
renderer.shutdown()
SDL_GL_DeleteContext(gl_context)
SDL_DestroyWindow(window)
SDL_Quit()
def main_pygame():
pygame.init()
size = 800, 600
pygame.display.set_mode(size, pygame.DOUBLEBUF | pygame.OPENGL)
io = imgui.get_io()
io.fonts.add_font_default()
io.display_size = size
renderer = PygameRenderer()
while 1:
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
renderer.process_event(event)
imgui.new_frame()
on_frame()
# note: cannot use screen.fill((1, 1, 1)) because pygame's screen
# does not support fill() on OpenGL sufraces
gl.glClearColor(1, 1, 1, 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
imgui.render()
pygame.display.flip()
def main_glfw():
def glfw_init():
width, height = 1280, 720
window_name = "minimal ImGui/GLFW3 example"
if not glfw.init():
print("Could not initialize OpenGL context")
exit(1)
# OS X supports only forward-compatible core profiles from 3.2
glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
glfw.window_hint(glfw.OPENGL_FORWARD_COMPAT, gl.GL_TRUE)
# Create a windowed mode window and its OpenGL context
window = glfw.create_window(
int(width), int(height), window_name, None, None
)
glfw.make_context_current(window)
if not window:
glfw.terminate()
print("Could not initialize Window")
exit(1)
return window
window = glfw_init()
impl = GlfwRenderer(window)
while not glfw.window_should_close(window):
glfw.poll_events()
impl.process_inputs()
imgui.new_frame()
on_frame()
gl.glClearColor(1., 1., 1., 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
imgui.render()
impl.render(imgui.get_draw_data())
glfw.swap_buffers(window)
impl.shutdown()
glfw.terminate()
def main_cocos2d():
class HelloWorld(ImguiLayer):
is_event_handler = True
def __init__(self):
super(HelloWorld, self).__init__()
self._text = "Input text here"
def draw(self, *args, **kwargs):
imgui.new_frame()
on_frame()
gl.glClearColor(1., 1., 1., 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
imgui.render()
director.init(width=800, height=600, resizable=True)
hello_layer = HelloWorld()
main_scene = cocos.scene.Scene(hello_layer)
director.run(main_scene)
# backend-independent frame rendering function:
def on_frame():
if imgui.begin_main_menu_bar():
if imgui.begin_menu("File", True):
clicked_quit, selected_quit = imgui.menu_item(
"Quit", 'Cmd+Q', False, True
)
if clicked_quit:
exit(1)
imgui.end_menu()
imgui.end_main_menu_bar()
imgui.show_test_window()
imgui.begin("Custom window", True)
imgui.text("Bar")
imgui.text_colored("Eggs", 0.2, 1., 0.)
imgui.end()
if __name__ == "__main__":
imgui.create_context()
io = imgui.get_io()
if backend == "sdl2":
main_sdl2()
elif backend == "pygame":
main_pygame()
elif backend == "glfw":
main_glfw()
elif backend == "cocos2d":
main_cocos2d()
