axmol/cocos2dx/platform/nacl/CCEGLView.cpp

/****************************************************************************
Copyright (c) 2013 The Chromium Authors

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
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all copies or substantial portions of the Software.

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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 "CCGL.h"
#include "ccMacros.h"
#include "CCDirector.h"
#include "CCInstance.h"
#include "touch_dispatcher/CCTouch.h"
#include "touch_dispatcher/CCTouchDispatcher.h"
#include "text_input_node/CCIMEDispatcher.h"

#include "ppapi/c/ppb_opengles2.h"
#include "ppapi/cpp/graphics_3d.h"
#include "ppapi/cpp/graphics_3d_client.h"
#include "ppapi/cpp/size.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/gles2/gl2ext_ppapi.h"

class OpenGLContext : public pp::Graphics3DClient
{
public:
    OpenGLContext(pp::Instance* instance, pp::Size size);
    ~OpenGLContext();

    virtual void Graphics3DContextLost()
    {
        assert(!"Unexpectedly lost graphics context");
    }

    bool MakeContextCurrent();
    void InvalidateContext();
    void ResizeContext(int width, int height);
    void FlushContext();
    pp::Size GetSize() { return _size; }
private:
    pp::Size _size;
    pp::Graphics3D _graphics3d;
    const struct PPB_OpenGLES2* _gles2_interface;
    pp::Instance* _instance;
};

OpenGLContext::OpenGLContext(pp::Instance* instance, pp::Size size) :
   pp::Graphics3DClient(instance), _size(size), _instance(instance)
{
    pp::Module* module = pp::Module::Get();
    assert(module);
    _gles2_interface = static_cast<const struct PPB_OpenGLES2*>(
            module->GetBrowserInterface(PPB_OPENGLES2_INTERFACE));
    assert(_gles2_interface);
}

OpenGLContext::~OpenGLContext()
{
    CCLOG("OpenGLContext::~OpenGLContext");
    glSetCurrentContextPPAPI(0);
}

bool OpenGLContext::MakeContextCurrent()
{
    CCLOG("OpenGLContext::MakeContextCurrent %dx%d",
          _size.width(), _size.height());

    // Lazily create the Pepper context.
    if (_graphics3d.is_null())
    {
        int32_t attribs[] = {
            PP_GRAPHICS3DATTRIB_ALPHA_SIZE, 8,
            PP_GRAPHICS3DATTRIB_DEPTH_SIZE, 24,
            PP_GRAPHICS3DATTRIB_STENCIL_SIZE, 8,
            PP_GRAPHICS3DATTRIB_SAMPLES, 0,
            PP_GRAPHICS3DATTRIB_SAMPLE_BUFFERS, 0,
            PP_GRAPHICS3DATTRIB_WIDTH, _size.width(),
            PP_GRAPHICS3DATTRIB_HEIGHT, _size.height(),
            PP_GRAPHICS3DATTRIB_NONE
        };
        _graphics3d = pp::Graphics3D(_instance, pp::Graphics3D(), attribs);
        if (_graphics3d.is_null())
        {
            glSetCurrentContextPPAPI(0);
            return false;
        }
        bool rtn = _instance->BindGraphics(_graphics3d);
        assert(rtn && "BindGraphics failed");
        if (!rtn)
          return false;
    }

    CCLOG("glSetCurrentContextPPAPI: %p", (void*)_graphics3d.pp_resource());
    glSetCurrentContextPPAPI(_graphics3d.pp_resource());
    return true;
}

void OpenGLContext::InvalidateContext()
{
    CCLOG("InvalidateContext");
    glSetCurrentContextPPAPI(0);
}

void OpenGLContext::ResizeContext(int width, int height)
{
    CCLOG("OpenGLContext::ResizeContext %dx%d", width, height);
    _size.SetSize(width, height);
    if (!_graphics3d.is_null())
    {
        _graphics3d.ResizeBuffers(width, height);
    }
}

void OpenGLContext::FlushContext()
{
    //CCLOG("OpenGLContext::FlushContext");
    _graphics3d.SwapBuffers(pp::BlockUntilComplete());
}


NS_CC_BEGIN

EGLView::EGLView() : bIsInit(false), bIsMouseDown(false), _frameZoomFactor(1.0f), _context(NULL)
{
    CCLOG("CCEGLView::EGLView");
    pthread_mutex_init(&_mutex, NULL);
    initGL();
}

EGLView::~EGLView()
{
}

void EGLView::setFrameSize(float width, float height)
{
    EGLViewProtocol::setFrameSize(width, height);
    if (_context)
      _context->ResizeContext(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));
}


bool EGLView::isOpenGLReady()
{
    return bIsInit;
}

void EGLView::end()
{
    delete this;
    exit(0);
}

void EGLView::swapBuffers()
{
    if (!bIsInit)
        return;

    _context->FlushContext();
}

void EGLView::setIMEKeyboardState(bool bOpen)
{
}

bool EGLView::initGL()
{
    CCLOG("initGL: instance=%p", g_instance);
    assert(g_instance);
    assert(!_context);
    const pp::Size& size = g_instance->Size();
    setFrameSize(size.width(), size.height());
    _context = new OpenGLContext(g_instance, size);
    CCLOG("initGL: _context=%p", _context);
    bool rtn = _context->MakeContextCurrent();
    CCLOG("MakeContextCurrent returned: %d", rtn);
    assert(rtn == true && "MakeContextCurrent failed");
    if (!rtn)
      return false;
    bIsInit = true;
    return true;
}

void EGLView::destroyGL()
{
    delete _context;
    bIsInit = false;
    CCLOG("destroyGL");
}

EGLView* EGLView::getInstance()
{
    static EGLView* s_pEglView = NULL;
    if (s_pEglView == NULL)
    {
        CCLOG("creating EGLView");
        s_pEglView = new EGLView();
    }
    return s_pEglView;
}

// XXX: deprecated
EGLView* EGLView::sharedOpenGLView()
{
    return EGLView::getInstance();
}

void EGLView::HandleMouseEvent(const pp::MouseInputEvent* event)
{
    pp::Point pos = event->GetPosition();
    float x = pos.x();
    float y = pos.y();
    int touchID = 1;

    // Clamp event position to be within cocos2dx window size
    Size frame_size = getFrameSize();
    float max_y = frame_size.height;
    float max_x = frame_size.width;

    if (x < 0)
      x = 0;
    if (y < 0)
      y = 0;
    if (y > max_y)
      y = max_y;
    if (x > max_x)
      x = max_x;

    switch (event->GetType())
    {
        case PP_INPUTEVENT_TYPE_MOUSEDOWN:
            handleTouchesBegin(1, &touchID, &x, &y);
            bIsMouseDown = true;
            break;
        case PP_INPUTEVENT_TYPE_MOUSEUP:
            handleTouchesEnd(1, &touchID, &x, &y);
            bIsMouseDown = false;
            break;
        case PP_INPUTEVENT_TYPE_MOUSEMOVE:
            if (bIsMouseDown)
                handleTouchesMove(1, &touchID, &x, &y);
            break;
        default:
            break;
    }
}

void EGLView::ProcessEventQueue()
{
    const pp::Size& size = g_instance->Size();
    // If the size of the global instance has changed then
    // we need to update our GL frame size accordingly
    if (size != _context->GetSize())
    {
        setFrameSize(size.width(), size.height());
    }

    pthread_mutex_lock(&_mutex);
    while (_event_queue.size())
    {
        pp::InputEvent event = _event_queue.front();
        _event_queue.pop();
        PP_InputEvent_Type type = event.GetType();
        switch (type)
        {
            case PP_INPUTEVENT_TYPE_KEYDOWN:
                CCLOG("got KEYDOWN");
                break;
            case PP_INPUTEVENT_TYPE_KEYUP:
                CCLOG("got KEYUP");
                break;
            case PP_INPUTEVENT_TYPE_CHAR:
                CCLOG("got KEYCHAR");
                break;
            case PP_INPUTEVENT_TYPE_MOUSEENTER:
                CCLOG("got MOUSEENTER");
                break;
            case PP_INPUTEVENT_TYPE_MOUSELEAVE:
                CCLOG("got MOUSELEAVE");
                break;
            case PP_INPUTEVENT_TYPE_MOUSEDOWN:
            case PP_INPUTEVENT_TYPE_MOUSEUP:
            case PP_INPUTEVENT_TYPE_MOUSEMOVE:
                {
                    const pp::MouseInputEvent* mevent =
                        reinterpret_cast<const pp::MouseInputEvent*>(&event);
                    HandleMouseEvent(mevent);
                    break;
                }
            default:
                CCLOG("unhandled event type: %d", type);
                break;
        }
    }
    pthread_mutex_unlock(&_mutex);
}

void EGLView::AddEvent(const pp::InputEvent& event)
{
    pthread_mutex_lock(&_mutex);
    _event_queue.push(event);
    pthread_mutex_unlock(&_mutex);
}

CocosPepperInstance* EGLView::g_instance;

NS_CC_END