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GLFWApp.h
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GLFWApp.h
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/*
* Copyright (c) 2015 Michael Shafae
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* $Id: GLFWApp.h 6554 2017-09-05 06:58:22Z mshafae $
*
* STUDENTS DO NOT NEED TO MAKE ANY CHANGES TO THIS FILE.
*
*/
//#pragma clang diagnostic ignored "-Wunused-private-field"
#include <array>
#include <tuple>
#ifndef _MSGFX_GLFW3_APP_
#define _MSGFX_GLFW3_APP_
#ifdef WIN32
#pragma once
#define _CRT_SECURE_NO_WARNINGS 1
#define WIN32_LEAN_AND_MEAN 1
#define _USE_MATH_DEFINES 1
#include <Windows.h>
#pragma warning(disable : 4305)
#endif
#include <cstdlib>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <cmath>
#include <iostream>
#include <string>
// #include <FreeImage.h>
#include <GL/glew.h>
//#define GLFW_INCLUDE_GLU
//#define GLFW_INCLUDE_GLCOREARB
#include <GLFW/glfw3.h>
class GLFWApp{
public:
typedef enum{
CORE = GLFW_OPENGL_CORE_PROFILE,
COMPATIBILITY = GLFW_OPENGL_COMPAT_PROFILE
}profile_t;
typedef enum{
VSYNC,
ASYNC,
TEARING
}syncmode_t;
typedef enum{
MOUSE_BUTTON_NONE = 0,
MOUSE_BUTTON_LEFT = 1,
MOUSE_BUTTON_RIGHT = 2,
MOUSE_BUTTON_MIDDLE = 4
}mouseButton_t;
typedef enum{
KEY_PRESS = GLFW_PRESS,
KEY_RELEASE = GLFW_RELEASE,
KEY_REPEAT = GLFW_REPEAT
}keyaction_t;
GLFWApp(int argc, char* argv[], const char* windowTitle,
int windowSize_X, int windowSize_Y,
int major = 2, int minor = 1,
std::tuple<int, int> const & position = std::make_tuple(100, 100)) :
_window(nullptr),
_windowTitle(windowTitle),
_major(major),
_minor(minor),
_mouseButtonFlags(0) {
_mousePreviousPosition = std::make_tuple(windowSize_X / 2.0, windowSize_Y / 2.0);
_mouseCurrentPosition = _mousePreviousPosition;
memset(&_keyPressed[0], 0, sizeof(_keyPressed));
glfwInit( );
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
glfwWindowHint(GLFW_VISIBLE, GL_TRUE);
glfwWindowHint(GLFW_SRGB_CAPABLE, GL_FALSE);
glfwWindowHint(GLFW_DECORATED, GL_TRUE);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_API);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, _major);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, _minor);
/* When you want core profile
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
*/
_window = glfwCreateWindow(windowSize_X, windowSize_Y, windowTitle, nullptr, nullptr);
if(_window){
glfwSetWindowPos(_window, std::get<0>(position), std::get<1>(position));
glfwSetWindowUserPointer(_window, this);
glfwSetMouseButtonCallback(_window, GLFWApp::_mouseButtonCallback);
glfwSetCursorPosCallback(_window, GLFWApp::_cursorPositionCallback);
glfwSetKeyCallback(_window, GLFWApp::_keyCallback);
glfwMakeContextCurrent(_window);
glewExperimental = GL_TRUE;
glewInit( );
sync(VSYNC);
// FreeImage_Initialise( );
assert(checkGLError("Constructor"));
}else{
fprintf(stderr, "Failed constructor (%d, %d)\n", _myGLVersion( ), _reportedGLVersion( ));
assert(_window);
}
}
virtual ~GLFWApp( ){
if(_window){
glfwDestroyWindow(_window);
}
// FreeImage_DeInitialise( );
glfwTerminate( );
}
void sync(syncmode_t const & sync){
switch(sync){
case ASYNC:
glfwSwapInterval(0);
break;
case VSYNC:
glfwSwapInterval(1);
break;
case TEARING:
glfwSwapInterval(-1);
break;
default:
fprintf(stderr, "No such syncmode. (%d)\n", sync);
break;
}
}
void swap( ){
glfwSwapBuffers(_window);
}
virtual bool begin( ) = 0;
virtual bool render( ) = 0;
virtual bool end( ) = 0;
void windowShouldClose( ){
glfwSetWindowShouldClose(_window, GL_TRUE);
}
int operator( )( ){
int rv = EXIT_FAILURE;
if(_window != 0){
rv = this->begin() ? EXIT_SUCCESS : EXIT_FAILURE;
while(rv == EXIT_SUCCESS){
rv = this->render() ? EXIT_SUCCESS : EXIT_FAILURE;
rv = rv && this->checkGLError("Render");
glfwPollEvents( );
if(glfwWindowShouldClose(_window)){
break;
}
swap( );
}
rv = rv && this->end();
}
return rv;
}
std::tuple<int, int> windowSize( ) const{
int x, y;
glfwGetFramebufferSize(_window, &x, &y);
return std::make_tuple(x, y);
}
int windowWidth( ) const{
std::tuple<int, int> w = windowSize( );
return std::get<0>(w);
}
int windowHeight( ) const{
std::tuple<int, int> w = windowSize( );
return std::get<1>(w);
}
GLFWwindow* window( ){
return _window;
}
bool isKeyPressed(int key) const{
return _keyPressed[key];
}
void keyUp(int key){
_keyPressed[key] = false;
}
protected:
bool checkGLError(const char *msg){
bool ret = true;
GLenum err = glGetError( );
std::string errorString;
while(err != GL_NO_ERROR){
ret = false;
switch(err){
case GL_INVALID_ENUM:
errorString = "GL_INVALID_ENUM";
break;
case GL_INVALID_VALUE:
errorString = "GL_INVALID_VALUE";
break;
case GL_INVALID_OPERATION:
errorString = "GL_INVALID_OPERATION";
break;
case GL_STACK_OVERFLOW:
errorString = "GL_STACK_OVERFLOW";
break;
case GL_STACK_UNDERFLOW:
errorString = "GL_STACK_UNDERFLOW";
break;
case GL_TABLE_TOO_LARGE:
errorString = "GL_TABLE_TOO_LARGE";
break;
case GL_INVALID_FRAMEBUFFER_OPERATION:
// OpenGL 3.0 and later
errorString = "GL_INVALID_FRAMEBUFFER_OPERATION";
break;
case GL_OUT_OF_MEMORY:
errorString = "GL_OUT_OF_MEMORY";
break;
}
fprintf(stderr, "GL ERROR(%s): %s\n", msg, errorString.c_str( ));
err = glGetError( );
}
return( ret );
}
std::tuple<int, int> mouseCurrentPosition( ){
return _mouseCurrentPosition;
}
int mouseButtonFlags( ){
return _mouseButtonFlags;
}
private:
GLFWwindow* _window;
std::string _windowTitle;
int _major;
int _minor;
std::array<bool, 512> _keyPressed;
int _mouseButtonFlags;
std::tuple<float, float> _mousePreviousPosition;
std::tuple<float, float> _mouseCurrentPosition;
static void _mouseButtonCallback(GLFWwindow* window, int button, int action, int mods){
GLFWApp *app = reinterpret_cast<GLFWApp*>(glfwGetWindowUserPointer(window));
assert(app != nullptr);
switch(action){
case GLFW_PRESS:
{
app->_mousePreviousPosition = app->_mouseCurrentPosition;
switch(button)
{
case GLFW_MOUSE_BUTTON_LEFT:
{
app->_mouseButtonFlags |= GLFWApp::MOUSE_BUTTON_LEFT;
}
break;
case GLFW_MOUSE_BUTTON_MIDDLE:
{
app->_mouseButtonFlags |= GLFWApp::MOUSE_BUTTON_MIDDLE;
}
break;
case GLFW_MOUSE_BUTTON_RIGHT:
{
app->_mouseButtonFlags |= GLFWApp::MOUSE_BUTTON_RIGHT;
}
break;
}
}
break;
case GLFW_RELEASE:
{
switch(button)
{
case GLFW_MOUSE_BUTTON_LEFT:
{
app->_mouseButtonFlags &= ~GLFWApp::MOUSE_BUTTON_LEFT;
}
break;
case GLFW_MOUSE_BUTTON_MIDDLE:
{
app->_mouseButtonFlags &= ~GLFWApp::MOUSE_BUTTON_MIDDLE;
}
break;
case GLFW_MOUSE_BUTTON_RIGHT:
{
app->_mouseButtonFlags &= ~GLFWApp::MOUSE_BUTTON_RIGHT;
}
break;
}
}
break;
}
}
static void _keyCallback(GLFWwindow* window, int key, int scancode, int action, int mods){
if(key < 0){
return;
}
GLFWApp *app = reinterpret_cast<GLFWApp*>(glfwGetWindowUserPointer(window));
assert(app != nullptr);
app->_keyPressed[key] = (action == KEY_PRESS || action == GLFW_REPEAT);
if(app->isKeyPressed(GLFW_KEY_ESCAPE)){
app->end( );
}
}
static void _cursorPositionCallback(GLFWwindow* window, double x, double y){
GLFWApp *app = reinterpret_cast<GLFWApp*>(glfwGetWindowUserPointer(window));
assert(app != nullptr);
app->_mouseCurrentPosition = std::make_tuple(int(floor(x)), int(floor(y)));
}
int _version(int major, int minor) const{
return major * 100 + minor * 10;
}
int _myGLVersion( ) const{
return _major * 100 + _minor * 10;
}
int _reportedGLVersion( ) const{
GLint major = 0;
GLint minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
return _version(major, minor);
}
bool _checkGLVersion( ) const{
return _reportedGLVersion( ) >= _myGLVersion( );
}
static void _glfwSimpleErrorCallback(int error, const char* description){
fprintf(stderr, "GLFW Error: %s\n", description);
}
}; // end GLFWApp
#endif