axmol/cocos/2d/platform/desktop/CCEGLView.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCEGLView.h"

#include <unordered_map>

#include "CCDirector.h"
#include "CCSet.h"
#include "CCTouch.h"
#include "CCEventDispatcher.h"
#include "CCEventKeyboard.h"
#include "CCEventMouse.h"
#include "CCIMEDispatcher.h"

NS_CC_BEGIN

struct keyCodeItem
{
    int glfwKeyCode;
    EventKeyboard::KeyCode keyCode;
};

static std::unordered_map<int, EventKeyboard::KeyCode> g_keyCodeMap;

static keyCodeItem g_keyCodeStructArray[] = {
    /* The unknown key */
    { GLFW_KEY_UNKNOWN         , EventKeyboard::KeyCode::KEY_NONE          },
    
    /* Printable keys */
    { GLFW_KEY_SPACE           , EventKeyboard::KeyCode::KEY_SPACE         },
    { GLFW_KEY_APOSTROPHE      , EventKeyboard::KeyCode::KEY_APOSTROPHE    },
    { GLFW_KEY_COMMA           , EventKeyboard::KeyCode::KEY_COMMA         },
    { GLFW_KEY_MINUS           , EventKeyboard::KeyCode::KEY_MINUS         },
    { GLFW_KEY_PERIOD          , EventKeyboard::KeyCode::KEY_PERIOD        },
    { GLFW_KEY_SLASH           , EventKeyboard::KeyCode::KEY_SLASH         },
    { GLFW_KEY_0               , EventKeyboard::KeyCode::KEY_0             },
    { GLFW_KEY_1               , EventKeyboard::KeyCode::KEY_1             },
    { GLFW_KEY_2               , EventKeyboard::KeyCode::KEY_2             },
    { GLFW_KEY_3               , EventKeyboard::KeyCode::KEY_3             },
    { GLFW_KEY_4               , EventKeyboard::KeyCode::KEY_4             },
    { GLFW_KEY_5               , EventKeyboard::KeyCode::KEY_5             },
    { GLFW_KEY_6               , EventKeyboard::KeyCode::KEY_6             },
    { GLFW_KEY_7               , EventKeyboard::KeyCode::KEY_7             },
    { GLFW_KEY_8               , EventKeyboard::KeyCode::KEY_8             },
    { GLFW_KEY_9               , EventKeyboard::KeyCode::KEY_9             },
    { GLFW_KEY_SEMICOLON       , EventKeyboard::KeyCode::KEY_SEMICOLON     },
    { GLFW_KEY_EQUAL           , EventKeyboard::KeyCode::KEY_EQUAL         },
    { GLFW_KEY_A               , EventKeyboard::KeyCode::KEY_A             },
    { GLFW_KEY_B               , EventKeyboard::KeyCode::KEY_B             },
    { GLFW_KEY_C               , EventKeyboard::KeyCode::KEY_C             },
    { GLFW_KEY_D               , EventKeyboard::KeyCode::KEY_D             },
    { GLFW_KEY_E               , EventKeyboard::KeyCode::KEY_E             },
    { GLFW_KEY_F               , EventKeyboard::KeyCode::KEY_F             },
    { GLFW_KEY_G               , EventKeyboard::KeyCode::KEY_G             },
    { GLFW_KEY_H               , EventKeyboard::KeyCode::KEY_H             },
    { GLFW_KEY_I               , EventKeyboard::KeyCode::KEY_I             },
    { GLFW_KEY_J               , EventKeyboard::KeyCode::KEY_J             },
    { GLFW_KEY_K               , EventKeyboard::KeyCode::KEY_K             },
    { GLFW_KEY_L               , EventKeyboard::KeyCode::KEY_L             },
    { GLFW_KEY_M               , EventKeyboard::KeyCode::KEY_M             },
    { GLFW_KEY_N               , EventKeyboard::KeyCode::KEY_N             },
    { GLFW_KEY_O               , EventKeyboard::KeyCode::KEY_O             },
    { GLFW_KEY_P               , EventKeyboard::KeyCode::KEY_P             },
    { GLFW_KEY_Q               , EventKeyboard::KeyCode::KEY_Q             },
    { GLFW_KEY_R               , EventKeyboard::KeyCode::KEY_R             },
    { GLFW_KEY_S               , EventKeyboard::KeyCode::KEY_S             },
    { GLFW_KEY_T               , EventKeyboard::KeyCode::KEY_T             },
    { GLFW_KEY_U               , EventKeyboard::KeyCode::KEY_U             },
    { GLFW_KEY_V               , EventKeyboard::KeyCode::KEY_V             },
    { GLFW_KEY_W               , EventKeyboard::KeyCode::KEY_W             },
    { GLFW_KEY_X               , EventKeyboard::KeyCode::KEY_X             },
    { GLFW_KEY_Y               , EventKeyboard::KeyCode::KEY_Y             },
    { GLFW_KEY_Z               , EventKeyboard::KeyCode::KEY_Z             },
    { GLFW_KEY_LEFT_BRACKET    , EventKeyboard::KeyCode::KEY_LEFT_BRACKET  },
    { GLFW_KEY_BACKSLASH       , EventKeyboard::KeyCode::KEY_BACK_SLASH    },
    { GLFW_KEY_RIGHT_BRACKET   , EventKeyboard::KeyCode::KEY_RIGHT_BRACKET },
    { GLFW_KEY_GRAVE_ACCENT    , EventKeyboard::KeyCode::KEY_GRAVE         },
    { GLFW_KEY_WORLD_1         , EventKeyboard::KeyCode::KEY_GRAVE         },
    { GLFW_KEY_WORLD_2         , EventKeyboard::KeyCode::KEY_NONE          },
    
    /* Function keys */
    { GLFW_KEY_ESCAPE          , EventKeyboard::KeyCode::KEY_ESCAPE        },
    { GLFW_KEY_ENTER           , EventKeyboard::KeyCode::KEY_KP_ENTER      },
    { GLFW_KEY_TAB             , EventKeyboard::KeyCode::KEY_TAB           },
    { GLFW_KEY_BACKSPACE       , EventKeyboard::KeyCode::KEY_BACKSPACE     },
    { GLFW_KEY_INSERT          , EventKeyboard::KeyCode::KEY_INSERT        },
    { GLFW_KEY_DELETE          , EventKeyboard::KeyCode::KEY_DELETE        },
    { GLFW_KEY_RIGHT           , EventKeyboard::KeyCode::KEY_RIGHT_ARROW   },
    { GLFW_KEY_LEFT            , EventKeyboard::KeyCode::KEY_LEFT_ARROW    },
    { GLFW_KEY_DOWN            , EventKeyboard::KeyCode::KEY_DOWN_ARROW    },
    { GLFW_KEY_UP              , EventKeyboard::KeyCode::KEY_UP_ARROW      },
    { GLFW_KEY_PAGE_UP         , EventKeyboard::KeyCode::KEY_KP_PG_UP      },
    { GLFW_KEY_PAGE_DOWN       , EventKeyboard::KeyCode::KEY_KP_PG_DOWN    },
    { GLFW_KEY_HOME            , EventKeyboard::KeyCode::KEY_KP_HOME       },
    { GLFW_KEY_END             , EventKeyboard::KeyCode::KEY_END           },
    { GLFW_KEY_CAPS_LOCK       , EventKeyboard::KeyCode::KEY_CAPS_LOCK     },
    { GLFW_KEY_SCROLL_LOCK     , EventKeyboard::KeyCode::KEY_SCROLL_LOCK   },
    { GLFW_KEY_NUM_LOCK        , EventKeyboard::KeyCode::KEY_NUM_LOCK      },
    { GLFW_KEY_PRINT_SCREEN    , EventKeyboard::KeyCode::KEY_PRINT         },
    { GLFW_KEY_PAUSE           , EventKeyboard::KeyCode::KEY_PAUSE         },
    { GLFW_KEY_F1              , EventKeyboard::KeyCode::KEY_F1            },
    { GLFW_KEY_F2              , EventKeyboard::KeyCode::KEY_F2            },
    { GLFW_KEY_F3              , EventKeyboard::KeyCode::KEY_F3            },
    { GLFW_KEY_F4              , EventKeyboard::KeyCode::KEY_F4            },
    { GLFW_KEY_F5              , EventKeyboard::KeyCode::KEY_F5            },
    { GLFW_KEY_F6              , EventKeyboard::KeyCode::KEY_F6            },
    { GLFW_KEY_F7              , EventKeyboard::KeyCode::KEY_F7            },
    { GLFW_KEY_F8              , EventKeyboard::KeyCode::KEY_F8            },
    { GLFW_KEY_F9              , EventKeyboard::KeyCode::KEY_F9            },
    { GLFW_KEY_F10             , EventKeyboard::KeyCode::KEY_F10           },
    { GLFW_KEY_F11             , EventKeyboard::KeyCode::KEY_F11           },
    { GLFW_KEY_F12             , EventKeyboard::KeyCode::KEY_F12           },
    { GLFW_KEY_F13             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F14             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F15             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F16             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F17             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F18             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F19             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F20             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F21             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F22             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F23             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F24             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_F25             , EventKeyboard::KeyCode::KEY_NONE          },
    { GLFW_KEY_KP_0            , EventKeyboard::KeyCode::KEY_0             },
    { GLFW_KEY_KP_1            , EventKeyboard::KeyCode::KEY_1             },
    { GLFW_KEY_KP_2            , EventKeyboard::KeyCode::KEY_2             },
    { GLFW_KEY_KP_3            , EventKeyboard::KeyCode::KEY_3             },
    { GLFW_KEY_KP_4            , EventKeyboard::KeyCode::KEY_4             },
    { GLFW_KEY_KP_5            , EventKeyboard::KeyCode::KEY_5             },
    { GLFW_KEY_KP_6            , EventKeyboard::KeyCode::KEY_6             },
    { GLFW_KEY_KP_7            , EventKeyboard::KeyCode::KEY_7             },
    { GLFW_KEY_KP_8            , EventKeyboard::KeyCode::KEY_8             },
    { GLFW_KEY_KP_9            , EventKeyboard::KeyCode::KEY_9             },
    { GLFW_KEY_KP_DECIMAL      , EventKeyboard::KeyCode::KEY_PERIOD        },
    { GLFW_KEY_KP_DIVIDE       , EventKeyboard::KeyCode::KEY_KP_DIVIDE     },
    { GLFW_KEY_KP_MULTIPLY     , EventKeyboard::KeyCode::KEY_KP_MULTIPLY   },
    { GLFW_KEY_KP_SUBTRACT     , EventKeyboard::KeyCode::KEY_KP_MINUS      },
    { GLFW_KEY_KP_ADD          , EventKeyboard::KeyCode::KEY_KP_PLUS       },
    { GLFW_KEY_KP_ENTER        , EventKeyboard::KeyCode::KEY_KP_ENTER      },
    { GLFW_KEY_KP_EQUAL        , EventKeyboard::KeyCode::KEY_EQUAL         },
    { GLFW_KEY_LEFT_SHIFT      , EventKeyboard::KeyCode::KEY_SHIFT         },
    { GLFW_KEY_LEFT_CONTROL    , EventKeyboard::KeyCode::KEY_CTRL          },
    { GLFW_KEY_LEFT_ALT        , EventKeyboard::KeyCode::KEY_ALT           },
    { GLFW_KEY_LEFT_SUPER      , EventKeyboard::KeyCode::KEY_HYPER         },
    { GLFW_KEY_RIGHT_SHIFT     , EventKeyboard::KeyCode::KEY_SHIFT         },
    { GLFW_KEY_RIGHT_CONTROL   , EventKeyboard::KeyCode::KEY_CTRL          },
    { GLFW_KEY_RIGHT_ALT       , EventKeyboard::KeyCode::KEY_ALT           },
    { GLFW_KEY_RIGHT_SUPER     , EventKeyboard::KeyCode::KEY_HYPER         },
    { GLFW_KEY_MENU            , EventKeyboard::KeyCode::KEY_MENU          },
    { GLFW_KEY_LAST            , EventKeyboard::KeyCode::KEY_NONE          }
};


//begin EGLViewEventHandler
class EGLViewEventHandler
{
public:
    static bool s_captured;
    static float s_mouseX;
    static float s_mouseY;
    
    static void onGLFWError(int errorID, const char* errorDesc);
    static void onGLFWMouseCallBack(GLFWwindow* window, int button, int action, int modify);
    static void onGLFWMouseMoveCallBack(GLFWwindow* window, double x, double y);
    static void onGLFWMouseScrollCallback(GLFWwindow* window, double x, double y);
    static void onGLFWKeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
    static void onGLFWCharCallback(GLFWwindow* window, unsigned int character);
    static void onGLFWWindowPosCallback(GLFWwindow* windows, int x, int y);
    static void onGLFWframebuffersize(GLFWwindow* window, int w, int h);
};

bool EGLViewEventHandler::s_captured = false;
float EGLViewEventHandler::s_mouseX = 0;
float EGLViewEventHandler::s_mouseY = 0;

void EGLViewEventHandler::onGLFWError(int errorID, const char* errorDesc)
{
    CCLOGERROR("GLFWError #%d Happen, %s\n", errorID, errorDesc);
}

void EGLViewEventHandler::onGLFWMouseCallBack(GLFWwindow* window, int button, int action, int modify)
{
    EGLView* eglView = Director::getInstance()->getOpenGLView();
    if(nullptr == eglView) return;
    if(GLFW_MOUSE_BUTTON_LEFT == button)
    {
        if(GLFW_PRESS == action)
        {
            s_captured = true;
            if (eglView->getViewPortRect().equals(Rect::ZERO) || eglView->getViewPortRect().containsPoint(Point(s_mouseX,s_mouseY)))
            {
                int id = 0;
                eglView->handleTouchesBegin(1, &id, &s_mouseX, &s_mouseY);
            }
        }
        else if(GLFW_RELEASE == action)
        {
            s_captured = false;
            if (eglView->getViewPortRect().equals(Rect::ZERO) || eglView->getViewPortRect().containsPoint(Point(s_mouseX,s_mouseY)))
            {
                int id = 0;
                eglView->handleTouchesEnd(1, &id, &s_mouseX, &s_mouseY);
            }
        }
    }
    
    if(GLFW_PRESS == action)
    {
        EventMouse event(EventMouse::MouseEventType::MOUSE_DOWN);
        //Because OpenGL and cocos2d-x uses different Y axis, we need to convert the coordinate here
        event.setCursorPosition(s_mouseX, eglView->getViewPortRect().size.height - s_mouseY);
        event.setMouseButton(button);
        Director::getInstance()->getEventDispatcher()->dispatchEvent(&event);
    }
    else if(GLFW_RELEASE == action)
    {
        EventMouse event(EventMouse::MouseEventType::MOUSE_UP);
        //Because OpenGL and cocos2d-x uses different Y axis, we need to convert the coordinate here
        event.setCursorPosition(s_mouseX, eglView->getViewPortRect().size.height - s_mouseY);
        event.setMouseButton(button);
        Director::getInstance()->getEventDispatcher()->dispatchEvent(&event);
    }
}

void EGLViewEventHandler::onGLFWMouseMoveCallBack(GLFWwindow* window, double x, double y)
{
    EGLView* eglView = Director::getInstance()->getOpenGLView();
    if(nullptr == eglView) return;
    
    if (eglView->isRetina()) {
        x *= 2;
        y *= 2;
    }
    
    s_mouseX = (float)x;
    s_mouseY = (float)y;
    
    s_mouseX /= eglView->getFrameZoomFactor();
    s_mouseY /= eglView->getFrameZoomFactor();
    
    if(s_captured)
    {
        if (eglView->getViewPortRect().equals(Rect::ZERO) || eglView->getViewPortRect().containsPoint(Point(s_mouseX,eglView->getFrameSize().height - s_mouseY)))
        {
            int id = 0;
            eglView->handleTouchesMove(1, &id, &s_mouseX, &s_mouseY);
        }
    }
    
    EventMouse event(EventMouse::MouseEventType::MOUSE_MOVE);
    //Because OpenGL and cocos2d-x uses different Y axis, we need to convert the coordinate here
    event.setCursorPosition(s_mouseX, eglView->getViewPortRect().size.height - s_mouseY);
    Director::getInstance()->getEventDispatcher()->dispatchEvent(&event);
}

void EGLViewEventHandler::onGLFWMouseScrollCallback(GLFWwindow* window, double x, double y)
{
    EGLView* eglView = Director::getInstance()->getOpenGLView();
    if(nullptr == eglView) return;
    
    EventMouse event(EventMouse::MouseEventType::MOUSE_SCROLL);
    //Because OpenGL and cocos2d-x uses different Y axis, we need to convert the coordinate here
    event.setScrollData((float)x, -(float)y);
    event.setCursorPosition(s_mouseX, eglView->getViewPortRect().size.height - s_mouseY);
    Director::getInstance()->getEventDispatcher()->dispatchEvent(&event);
}

void EGLViewEventHandler::onGLFWKeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods)
{
    if (GLFW_REPEAT != action)
    {
        EventKeyboard event(g_keyCodeMap[key], GLFW_PRESS == action);
        auto dispatcher = Director::getInstance()->getEventDispatcher();
        dispatcher->dispatchEvent(&event);
    }
}

void EGLViewEventHandler::onGLFWCharCallback(GLFWwindow *window, unsigned int character)
{
    IMEDispatcher::sharedDispatcher()->dispatchInsertText((const char*) &character, 1);
}

void EGLViewEventHandler::onGLFWWindowPosCallback(GLFWwindow *windows, int x, int y)
{
    Director::getInstance()->setViewport();
}

void EGLViewEventHandler::onGLFWframebuffersize(GLFWwindow* window, int w, int h)
{
    auto view = Director::getInstance()->getOpenGLView();

    float frameSizeW = view->getFrameSize().width;
    float frameSizeH = view->getFrameSize().height;
    float factorX = frameSizeW / w * view->getFrameZoomFactor();
    float factorY = frameSizeH / h * view->getFrameZoomFactor();;
    
    if (fabs(factorX - 0.5f) < FLT_EPSILON && fabs(factorY - 0.5f) < FLT_EPSILON )
    {
        view->_isRetina = true;
        view->setFrameZoomFactor(2.0f * view->getFrameZoomFactor());
        glfwSetWindowSize(window, static_cast<int>(frameSizeW * 0.5f * view->getFrameZoomFactor()) , static_cast<int>(frameSizeH * 0.5f * view->getFrameZoomFactor()));
    }
    else if(fabs(factorX - 2.0f) < FLT_EPSILON && fabs(factorY - 2.0f) < FLT_EPSILON)
    {
        view->_isRetina = false;
        view->setFrameZoomFactor(0.5f * view->getFrameZoomFactor());
        glfwSetWindowSize(window, static_cast<int>(frameSizeW * view->getFrameZoomFactor()), static_cast<int>(frameSizeH * view->getFrameZoomFactor()));
    }
}


//end EGLViewEventHandler


//////////////////////////////////////////////////////////////////////////
// implement EGLView
//////////////////////////////////////////////////////////////////////////


EGLView* EGLView::create(const std::string& viewName)
{
    auto ret = new EGLView;
    if(ret && ret->initWithSize(viewName, Size(960, 640), 1)) {
        ret->autorelease();
        return ret;
    }

    return nullptr;
}

EGLView* EGLView::createWithSize(const std::string& viewName, Size size, float frameZoomFactor)
{
    auto ret = new EGLView;
    if(ret && ret->initWithSize(viewName, size, frameZoomFactor)) {
        ret->autorelease();
        return ret;
    }

    return nullptr;
}

EGLView* EGLView::createWithFullScreen(const std::string& viewName)
{
    auto ret = new EGLView();
    if(ret && ret->initWithFullScreen(viewName)) {
        ret->autorelease();
        return ret;
    }

    return nullptr;
}

EGLView::EGLView()
: _captured(false)
, _frameZoomFactor(1.0f)
, _supportTouch(false)
, _isRetina(false)
, _mainWindow(nullptr)
, _primaryMonitor(nullptr)
{
    _viewName = "cocos2dx";
    g_keyCodeMap.clear();
    for (auto& item : g_keyCodeStructArray)
    {
        g_keyCodeMap[item.glfwKeyCode] = item.keyCode;
    }
    glfwSetErrorCallback(EGLViewEventHandler::onGLFWError);
    glfwInit();
}

EGLView::~EGLView()
{
    CCLOGINFO("deallocing EGLView: %p", this);
    glfwTerminate();
}

bool EGLView::initWithSize(const std::string& viewName, Size size, float frameZoomFactor)
{
    setViewName(viewName);
    setFrameSize(size.width, size.height);
    setFrameZoomFactor(frameZoomFactor);
    
    glfwWindowHint(GLFW_RESIZABLE,GL_FALSE);
    
    _mainWindow = glfwCreateWindow(_screenSize.width * _frameZoomFactor,
                                   _screenSize.height * _frameZoomFactor,
                                   _viewName.c_str(),
                                   _primaryMonitor,
                                   NULL);
    glfwMakeContextCurrent(_mainWindow);
    
    int w, h;
    glfwGetWindowSize(_mainWindow, &w, &h);
    int frameBufferW, frameBufferH;
    glfwGetFramebufferSize(_mainWindow, &frameBufferW, &frameBufferH);
    
    if (frameBufferW == 2 * w && frameBufferH == 2 * h)
    {
        _isRetina = true;
        setFrameZoomFactor(frameZoomFactor * 2);
        glfwSetWindowSize(_mainWindow, size.width/2 * _frameZoomFactor, size.height/2 * _frameZoomFactor);
    }
    
    glfwSetMouseButtonCallback(_mainWindow,EGLViewEventHandler::onGLFWMouseCallBack);
    glfwSetCursorPosCallback(_mainWindow,EGLViewEventHandler::onGLFWMouseMoveCallBack);
    glfwSetScrollCallback(_mainWindow, EGLViewEventHandler::onGLFWMouseScrollCallback);
    glfwSetCharCallback(_mainWindow, EGLViewEventHandler::onGLFWCharCallback);
    glfwSetKeyCallback(_mainWindow, EGLViewEventHandler::onGLFWKeyCallback);
    glfwSetWindowPosCallback(_mainWindow, EGLViewEventHandler::onGLFWWindowPosCallback);
    glfwSetFramebufferSizeCallback(_mainWindow, EGLViewEventHandler::onGLFWframebuffersize);
    // check OpenGL version at first
    const GLubyte* glVersion = glGetString(GL_VERSION);
    
    if ( atof((const char*)glVersion) < 1.5 )
    {
        char strComplain[256] = {0};
        sprintf(strComplain,
                "OpenGL 1.5 or higher is required (your version is %s). Please upgrade the driver of your video card.",
                glVersion);
        MessageBox(strComplain, "OpenGL version too old");
        return false;
    }
    
    initGlew();

    // Enable point size by default.
    glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
    
    return true;
}

bool EGLView::initWithFullScreen(const std::string& viewName)
{
    _primaryMonitor = glfwGetPrimaryMonitor();
    if (nullptr == _primaryMonitor)
        return false;
    
    const GLFWvidmode* videoMode = glfwGetVideoMode(_primaryMonitor);
    return initWithSize(viewName, Size(videoMode->width, videoMode->height), 1.0f);
}

bool EGLView::isOpenGLReady()
{
    return nullptr != _mainWindow;
}

void EGLView::end()
{
    if(_mainWindow)
        glfwSetWindowShouldClose(_mainWindow,1);
}

void EGLView::swapBuffers()
{
    if(_mainWindow)
        glfwSwapBuffers(_mainWindow);
}

bool EGLView::windowShouldClose()
{
    if(_mainWindow)
        return glfwWindowShouldClose(_mainWindow);
    else
        return true;
}

void EGLView::pollEvents()
{
    glfwPollEvents();
}

void EGLView::setIMEKeyboardState(bool /*bOpen*/)
{
    
}

void EGLView::setFrameZoomFactor(float zoomFactor)
{
    _frameZoomFactor = zoomFactor;
    Director::getInstance()->setProjection(Director::getInstance()->getProjection());
}

float EGLView::getFrameZoomFactor()
{
    return _frameZoomFactor;
}

void EGLView::setFrameSize(float width, float height)
{
    EGLViewProtocol::setFrameSize(width, height);
}

void EGLView::setViewPortInPoints(float x , float y , float w , float h)
{
    glViewport((GLint)(x * _scaleX * _frameZoomFactor + _viewPortRect.origin.x * _frameZoomFactor),
               (GLint)(y * _scaleY  * _frameZoomFactor + _viewPortRect.origin.y * _frameZoomFactor),
               (GLsizei)(w * _scaleX * _frameZoomFactor),
               (GLsizei)(h * _scaleY * _frameZoomFactor));
}

void EGLView::setScissorInPoints(float x , float y , float w , float h)
{
    glScissor((GLint)(x * _scaleX * _frameZoomFactor + _viewPortRect.origin.x * _frameZoomFactor),
               (GLint)(y * _scaleY  * _frameZoomFactor + _viewPortRect.origin.y * _frameZoomFactor),
               (GLsizei)(w * _scaleX * _frameZoomFactor),
               (GLsizei)(h * _scaleY * _frameZoomFactor));
}

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
static bool glew_dynamic_binding()
{
	const char *gl_extensions = (const char*)glGetString(GL_EXTENSIONS);

	// If the current opengl driver doesn't have framebuffers methods, check if an extension exists
	if (glGenFramebuffers == NULL)
	{
		log("OpenGL: glGenFramebuffers is NULL, try to detect an extension");
		if (strstr(gl_extensions, "ARB_framebuffer_object"))
		{
			log("OpenGL: ARB_framebuffer_object is supported");

			glIsRenderbuffer = (PFNGLISRENDERBUFFERPROC) wglGetProcAddress("glIsRenderbuffer");
			glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC) wglGetProcAddress("glBindRenderbuffer");
			glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC) wglGetProcAddress("glDeleteRenderbuffers");
			glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC) wglGetProcAddress("glGenRenderbuffers");
			glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC) wglGetProcAddress("glRenderbufferStorage");
			glGetRenderbufferParameteriv = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) wglGetProcAddress("glGetRenderbufferParameteriv");
			glIsFramebuffer = (PFNGLISFRAMEBUFFERPROC) wglGetProcAddress("glIsFramebuffer");
			glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC) wglGetProcAddress("glBindFramebuffer");
			glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC) wglGetProcAddress("glDeleteFramebuffers");
			glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC) wglGetProcAddress("glGenFramebuffers");
			glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) wglGetProcAddress("glCheckFramebufferStatus");
			glFramebufferTexture1D = (PFNGLFRAMEBUFFERTEXTURE1DPROC) wglGetProcAddress("glFramebufferTexture1D");
			glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC) wglGetProcAddress("glFramebufferTexture2D");
			glFramebufferTexture3D = (PFNGLFRAMEBUFFERTEXTURE3DPROC) wglGetProcAddress("glFramebufferTexture3D");
			glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) wglGetProcAddress("glFramebufferRenderbuffer");
			glGetFramebufferAttachmentParameteriv = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) wglGetProcAddress("glGetFramebufferAttachmentParameteriv");
			glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC) wglGetProcAddress("glGenerateMipmap");
		}
		else
		if (strstr(gl_extensions, "EXT_framebuffer_object"))
		{
			log("OpenGL: EXT_framebuffer_object is supported");
			glIsRenderbuffer = (PFNGLISRENDERBUFFERPROC) wglGetProcAddress("glIsRenderbufferEXT");
			glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC) wglGetProcAddress("glBindRenderbufferEXT");
			glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC) wglGetProcAddress("glDeleteRenderbuffersEXT");
			glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC) wglGetProcAddress("glGenRenderbuffersEXT");
			glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC) wglGetProcAddress("glRenderbufferStorageEXT");
			glGetRenderbufferParameteriv = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) wglGetProcAddress("glGetRenderbufferParameterivEXT");
			glIsFramebuffer = (PFNGLISFRAMEBUFFERPROC) wglGetProcAddress("glIsFramebufferEXT");
			glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC) wglGetProcAddress("glBindFramebufferEXT");
			glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC) wglGetProcAddress("glDeleteFramebuffersEXT");
			glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC) wglGetProcAddress("glGenFramebuffersEXT");
			glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) wglGetProcAddress("glCheckFramebufferStatusEXT");
			glFramebufferTexture1D = (PFNGLFRAMEBUFFERTEXTURE1DPROC) wglGetProcAddress("glFramebufferTexture1DEXT");
			glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC) wglGetProcAddress("glFramebufferTexture2DEXT");
			glFramebufferTexture3D = (PFNGLFRAMEBUFFERTEXTURE3DPROC) wglGetProcAddress("glFramebufferTexture3DEXT");
			glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) wglGetProcAddress("glFramebufferRenderbufferEXT");
			glGetFramebufferAttachmentParameteriv = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) wglGetProcAddress("glGetFramebufferAttachmentParameterivEXT");
			glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC) wglGetProcAddress("glGenerateMipmapEXT");
		}
		else
		{
			log("OpenGL: No framebuffers extension is supported");
			log("OpenGL: Any call to Fbo will crash!");
			return false;
		}
	}
	return true;
}
#endif

// helper
bool EGLView::initGlew()
{
#if (CC_TARGET_PLATFORM != CC_PLATFORM_MAC)
    GLenum GlewInitResult = glewInit();
    if (GLEW_OK != GlewInitResult)
    {
        MessageBox((char *)glewGetErrorString(GlewInitResult), "OpenGL error");
        return false;
    }

    if (GLEW_ARB_vertex_shader && GLEW_ARB_fragment_shader)
    {
        log("Ready for GLSL");
    }
    else
    {
        log("Not totally ready :(");
    }

    if (glewIsSupported("GL_VERSION_2_0"))
    {
        log("Ready for OpenGL 2.0");
    }
    else
    {
        log("OpenGL 2.0 not supported");
    }

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
    if(glew_dynamic_binding() == false)
    {
        MessageBox("No OpenGL framebuffer support. Please upgrade the driver of your video card.", "OpenGL error");
        return false;
	}
#endif

#endif // (CC_TARGET_PLATFORM != CC_PLATFORM_MAC)

    return true;
}

NS_CC_END // end of namespace cocos2d;