India/cocos2d-x/cocos/platform/CCGLView.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#include "platform/CCGLView.h"

#include "base/CCTouch.h"
#include "base/CCDirector.h"
#include "base/CCEventDispatcher.h"
#include "2d/CCCamera.h"
#include "2d/CCScene.h"
#include "renderer/CCRenderer.h"
#include "vr/CCVRProtocol.h"
#include "vr/CCVRGenericRenderer.h"

NS_CC_BEGIN

namespace {
    
    static Touch* g_touches[EventTouch::MAX_TOUCHES] = { nullptr };
    static unsigned int g_indexBitsUsed = 0;
    // System touch pointer ID (It may not be ascending order number) <-> Ascending order number from 0
    static std::map<intptr_t, int> g_touchIdReorderMap;
    
    static int getUnUsedIndex()
    {
        int i;
        int temp = g_indexBitsUsed;
        
        for (i = 0; i < EventTouch::MAX_TOUCHES; i++) {
            if (! (temp & 0x00000001)) {
                g_indexBitsUsed |= (1 <<  i);
                return i;
            }
            
            temp >>= 1;
        }
        
        // all bits are used
        return -1;
    }
    
    static std::vector<Touch*> getAllTouchesVector()
    {
        std::vector<Touch*> ret;
        int i;
        int temp = g_indexBitsUsed;
        
        for (i = 0; i < EventTouch::MAX_TOUCHES; i++) {
            if ( temp & 0x00000001) {
                ret.push_back(g_touches[i]);
            }
            temp >>= 1;
        }
        return ret;
    }
    
    static void removeUsedIndexBit(int index)
    {
        if (index < 0 || index >= EventTouch::MAX_TOUCHES)
        {
            return;
        }
        
        unsigned int temp = 1 << index;
        temp = ~temp;
        g_indexBitsUsed &= temp;
    }
    
}

//default context attributions are set as follows
GLContextAttrs GLView::_glContextAttrs = {8, 8, 8, 8, 24, 8, 0};

void GLView::setGLContextAttrs(GLContextAttrs& glContextAttrs)
{
    _glContextAttrs = glContextAttrs;
}

GLContextAttrs GLView::getGLContextAttrs()
{
    return _glContextAttrs;
}

GLView::GLView()
: _scaleX(1.0f)
, _scaleY(1.0f)
, _resolutionPolicy(ResolutionPolicy::UNKNOWN)
, _vrImpl(nullptr)
, _designResolutionSize(0,0)
, _screenSize(0,0)
{
}

GLView::~GLView()
{

}

void GLView::pollInputEvents()
{
    pollEvents();
}

void GLView::pollEvents()
{
}

void GLView::updateDesignResolutionSize()
{
    if (_screenSize.width > 0 && _screenSize.height > 0
        && _designResolutionSize.width > 0 && _designResolutionSize.height > 0)
    {
        _scaleX = (float)_screenSize.width / _designResolutionSize.width;
        _scaleY = (float)_screenSize.height / _designResolutionSize.height;
        
        if (_resolutionPolicy == ResolutionPolicy::NO_BORDER)
        {
            _scaleX = _scaleY = MAX(_scaleX, _scaleY);
        }
        
        else if (_resolutionPolicy == ResolutionPolicy::SHOW_ALL)
        {
            _scaleX = _scaleY = MIN(_scaleX, _scaleY);
        }
        
        else if ( _resolutionPolicy == ResolutionPolicy::FIXED_HEIGHT) {
            _scaleX = _scaleY;
            _designResolutionSize.width = ceilf(_screenSize.width/_scaleX);
        }
        
        else if ( _resolutionPolicy == ResolutionPolicy::FIXED_WIDTH) {
            _scaleY = _scaleX;
            _designResolutionSize.height = ceilf(_screenSize.height/_scaleY);
        }
        
        // calculate the rect of viewport
        float viewPortW = _designResolutionSize.width * _scaleX;
        float viewPortH = _designResolutionSize.height * _scaleY;
        
        _viewPortRect.setRect((_screenSize.width - viewPortW) / 2, (_screenSize.height - viewPortH) / 2, viewPortW, viewPortH);


        // reset director's member variables to fit visible rect
        auto director = Director::getInstance();
        director->_winSizeInPoints = getDesignResolutionSize();
        director->_isStatusLabelUpdated = true;
        director->setProjection(director->getProjection());

        // Github issue #16139
        // A default viewport is needed in order to display the FPS,
        // since the FPS are rendered in the Director, and there is no viewport there.
        // Everything, including the FPS should renderer in the Scene.
        glViewport(0, 0, _screenSize.width, _screenSize.height);
    }
}

void GLView::setDesignResolutionSize(float width, float height, ResolutionPolicy resolutionPolicy)
{
    CCASSERT(resolutionPolicy != ResolutionPolicy::UNKNOWN, "should set resolutionPolicy");
    
    if (width == 0.0f || height == 0.0f)
    {
        return;
    }

    _designResolutionSize.setSize(width, height);
    _resolutionPolicy = resolutionPolicy;
    
    updateDesignResolutionSize();
 }

const Size& GLView::getDesignResolutionSize() const 
{
    return _designResolutionSize;
}

Size GLView::getFrameSize() const
{
    return _screenSize;
}

void GLView::setFrameSize(float width, float height)
{
    _screenSize = Size(width, height);

    // Github issue #16003 and #16485
    // only update the designResolution if it wasn't previously set
    if (_designResolutionSize.equals(Size::ZERO))
        _designResolutionSize = _screenSize;
}

Rect GLView::getVisibleRect() const
{
    Rect ret;
    ret.size = getVisibleSize();
    ret.origin = getVisibleOrigin();
    return ret;
}

Rect GLView::getSafeAreaRect() const
{
    return getVisibleRect();
}

Size GLView::getVisibleSize() const
{
    if (_resolutionPolicy == ResolutionPolicy::NO_BORDER)
    {
        return Size(_screenSize.width/_scaleX, _screenSize.height/_scaleY);
    }
    else 
    {
        return _designResolutionSize;
    }
}

Vec2 GLView::getVisibleOrigin() const
{
    if (_resolutionPolicy == ResolutionPolicy::NO_BORDER)
    {
        return Vec2((_designResolutionSize.width - _screenSize.width/_scaleX)/2, 
                           (_designResolutionSize.height - _screenSize.height/_scaleY)/2);
    }
    else 
    {
        return Vec2::ZERO;
    }
}

void GLView::setViewPortInPoints(float x , float y , float w , float h)
{
    experimental::Viewport vp((float)(x * _scaleX + _viewPortRect.origin.x),
        (float)(y * _scaleY + _viewPortRect.origin.y),
        (float)(w * _scaleX),
        (float)(h * _scaleY));
    Camera::setDefaultViewport(vp);
}

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

bool GLView::isScissorEnabled()
{
    return (GL_FALSE == glIsEnabled(GL_SCISSOR_TEST)) ? false : true;
}

Rect GLView::getScissorRect() const
{
    GLfloat params[4];
    glGetFloatv(GL_SCISSOR_BOX, params);
    float x = (params[0] - _viewPortRect.origin.x) / _scaleX;
    float y = (params[1] - _viewPortRect.origin.y) / _scaleY;
    float w = params[2] / _scaleX;
    float h = params[3] / _scaleY;
    return Rect(x, y, w, h);
}

void GLView::setViewName(const std::string& viewname )
{
    _viewName = viewname;
}

const std::string& GLView::getViewName() const
{
    return _viewName;
}

void GLView::handleTouchesBegin(int num, intptr_t ids[], float xs[], float ys[])
{
    intptr_t id = 0;
    float x = 0.0f;
    float y = 0.0f;
    int unusedIndex = 0;
    EventTouch touchEvent;
    
    for (int i = 0; i < num; ++i)
    {
        id = ids[i];
        x = xs[i];
        y = ys[i];

        auto iter = g_touchIdReorderMap.find(id);

        // it is a new touch
        if (iter == g_touchIdReorderMap.end())
        {
            unusedIndex = getUnUsedIndex();

            // The touches is more than MAX_TOUCHES ?
            if (unusedIndex == -1) {
                CCLOG("The touches is more than MAX_TOUCHES, unusedIndex = %d", unusedIndex);
                continue;
            }

            Touch* touch = g_touches[unusedIndex] = new (std::nothrow) Touch();
            touch->setTouchInfo(unusedIndex, (x - _viewPortRect.origin.x) / _scaleX,
                                     (y - _viewPortRect.origin.y) / _scaleY);
            
            CCLOGINFO("x = %f y = %f", touch->getLocationInView().x, touch->getLocationInView().y);
            
            g_touchIdReorderMap.emplace(id, unusedIndex);
            touchEvent._touches.push_back(touch);
        }
    }

    if (touchEvent._touches.size() == 0)
    {
        CCLOG("touchesBegan: size = 0");
        return;
    }
    
    touchEvent._eventCode = EventTouch::EventCode::BEGAN;
    auto dispatcher = Director::getInstance()->getEventDispatcher();
    dispatcher->dispatchEvent(&touchEvent);
}

void GLView::handleTouchesMove(int num, intptr_t ids[], float xs[], float ys[])
{
    handleTouchesMove(num, ids, xs, ys, nullptr, nullptr);
}

void GLView::handleTouchesMove(int num, intptr_t ids[], float xs[], float ys[], float fs[], float ms[])
{
    intptr_t id = 0;
    float x = 0.0f;
    float y = 0.0f;
    float force = 0.0f;
    float maxForce = 0.0f;
    EventTouch touchEvent;
    
    for (int i = 0; i < num; ++i)
    {
        id = ids[i];
        x = xs[i];
        y = ys[i];
        force = fs ? fs[i] : 0.0f;
        maxForce = ms ? ms[i] : 0.0f;

        auto iter = g_touchIdReorderMap.find(id);
        if (iter == g_touchIdReorderMap.end())
        {
            CCLOG("if the index doesn't exist, it is an error");
            continue;
        }

        CCLOGINFO("Moving touches with id: %d, x=%f, y=%f, force=%f, maxFource=%f", (int)id, x, y, force, maxForce);
        Touch* touch = g_touches[iter->second];
        if (touch)
        {
            touch->setTouchInfo(iter->second, (x - _viewPortRect.origin.x) / _scaleX,
                                (y - _viewPortRect.origin.y) / _scaleY, force, maxForce);
            
            touchEvent._touches.push_back(touch);
        }
        else
        {
            // It is error, should return.
            CCLOG("Moving touches with id: %ld error", (long int)id);
            return;
        }
    }

    if (touchEvent._touches.size() == 0)
    {
        CCLOG("touchesMoved: size = 0");
        return;
    }
    
    touchEvent._eventCode = EventTouch::EventCode::MOVED;
    auto dispatcher = Director::getInstance()->getEventDispatcher();
    dispatcher->dispatchEvent(&touchEvent);
}

void GLView::handleTouchesOfEndOrCancel(EventTouch::EventCode eventCode, int num, intptr_t ids[], float xs[], float ys[])
{
    intptr_t id = 0;
    float x = 0.0f;
    float y = 0.0f;
    EventTouch touchEvent;
    
    for (int i = 0; i < num; ++i)
    {
        id = ids[i];
        x = xs[i];
        y = ys[i];

        auto iter = g_touchIdReorderMap.find(id);
        if (iter == g_touchIdReorderMap.end())
        {
            CCLOG("if the index doesn't exist, it is an error");
            continue;
        }
        
        /* Add to the set to send to the director */
        Touch* touch = g_touches[iter->second];
        if (touch)
        {
            CCLOGINFO("Ending touches with id: %d, x=%f, y=%f", (int)id, x, y);
            touch->setTouchInfo(iter->second, (x - _viewPortRect.origin.x) / _scaleX,
                                (y - _viewPortRect.origin.y) / _scaleY);

            touchEvent._touches.push_back(touch);
            
            g_touches[iter->second] = nullptr;
            removeUsedIndexBit(iter->second);

            g_touchIdReorderMap.erase(id);
        } 
        else
        {
            CCLOG("Ending touches with id: %ld error", static_cast<long>(id));
            return;
        } 

    }

    if (touchEvent._touches.size() == 0)
    {
        CCLOG("touchesEnded or touchesCancel: size = 0");
        return;
    }
    
    touchEvent._eventCode = eventCode;
    auto dispatcher = Director::getInstance()->getEventDispatcher();
    dispatcher->dispatchEvent(&touchEvent);
    
    for (auto& touch : touchEvent._touches)
    {
        // release the touch object.
        touch->release();
    }
}

void GLView::handleTouchesEnd(int num, intptr_t ids[], float xs[], float ys[])
{
    handleTouchesOfEndOrCancel(EventTouch::EventCode::ENDED, num, ids, xs, ys);
}

void GLView::handleTouchesCancel(int num, intptr_t ids[], float xs[], float ys[])
{
    handleTouchesOfEndOrCancel(EventTouch::EventCode::CANCELLED, num, ids, xs, ys);
}

const Rect& GLView::getViewPortRect() const
{
    return _viewPortRect;
}

std::vector<Touch*> GLView::getAllTouches() const
{
    return getAllTouchesVector();
}

float GLView::getScaleX() const
{
    return _scaleX;
}

float GLView::getScaleY() const
{
    return _scaleY;
}

void GLView::renderScene(Scene* scene, Renderer* renderer)
{
    CCASSERT(scene, "Invalid Scene");
    CCASSERT(renderer, "Invalid Renderer");

    if (_vrImpl)
    {
        _vrImpl->render(scene, renderer);
    }
    else
    {
        scene->render(renderer, Mat4::IDENTITY, nullptr);
    }
}

VRIRenderer* GLView::getVR() const
{
    return _vrImpl;
}

void GLView::setVR(VRIRenderer* vrRenderer)
{
    if (_vrImpl != vrRenderer)
    {
        if (_vrImpl) {
            _vrImpl->cleanup();
            delete _vrImpl;
        }

        if (vrRenderer)
            vrRenderer->setup(this);

        _vrImpl = vrRenderer;
    }
}

NS_CC_END