charcoal/OpenGLEngine/Application.cpp

#include "Application.h"

#include "Exception.h"

#include "Util.h"

namespace charcoal
{
	Application::Application(int width, int height)
		: m_screen_size(width, height)
	{
		if (width < 0 || height < 0)
			throw EXCEPTION("Invalid screen dimensions");

		if (!glfwInit())
			throw EXCEPTION("Unable to Initialize GLFW");

		m_p_window = glfwCreateWindow(width, height, "OpenGLEngine", NULL, NULL);
		if (!m_p_window)
		{
			glfwTerminate();
			throw EXCEPTION("Unable to Create GLFW Window");
		}

		glfwMakeContextCurrent(m_p_window);

		glfwSwapInterval(1);

		glewExperimental = GL_TRUE;
		GLenum glew_err = glewInit();
		if (glew_err != GLEW_OK)
		{
			glfwTerminate();
			throw EXCEPTION("Unable to Initialize GLEW: " + std::string((char*)glewGetErrorString(glew_err)));
		}

		// Output Version Information
		OutputDebugString("\nOpenGL Version Information:\nRenderer: ");
		OutputDebugString((char*)glGetString(GL_RENDERER));
		OutputDebugString("\nOpenGL Version: ");
		OutputDebugString((char*)glGetString(GL_VERSION));
		OutputDebugString("\n\n");

		// TODO: Mouse Movement, Mouse Scroll
		m_glfw_input_manager.init(m_p_window);
		glfwSetKeyCallback(m_p_window, &GLFWInputManager::key_callback);

		m_fps.prepare();
	}

	int Application::run()
	{
		try
		{
			init();
			while (!glfwWindowShouldClose(m_p_window))
			{
				// Handle all messages
				m_glfw_input_manager.mark();
				glfwPollEvents();
				float delta_time = m_fps.mark();
				clock_t clock = m_fps.get_clock();
				update(delta_time, clock);
				prerender();
				render();
				CHECK_GL_ERR();
				glfwSwapBuffers(m_p_window);
			}

			return 0;
		}
		catch (Exception& e)
		{
			glfwTerminate();
			throw e;
		}
	}

	void Application::base_close()
	{
		close();
	}
}