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
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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 m_size; }
private:
    pp::Size m_size;
    pp::Graphics3D m_graphics3d;
    const struct PPB_OpenGLES2* m_gles2_interface;
    pp::Instance* m_instance;
};

OpenGLContext::OpenGLContext(pp::Instance* instance, pp::Size size) :
   pp::Graphics3DClient(instance), m_size(size), m_instance(instance)
{
    pp::Module* module = pp::Module::Get();
    assert(module);
    m_gles2_interface = static_cast<const struct PPB_OpenGLES2*>(
            module->GetBrowserInterface(PPB_OPENGLES2_INTERFACE));
    assert(m_gles2_interface);
}

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

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

    // Lazily create the Pepper context.
    if (m_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, m_size.width(),
            PP_GRAPHICS3DATTRIB_HEIGHT, m_size.height(),
            PP_GRAPHICS3DATTRIB_NONE
        };
        m_graphics3d = pp::Graphics3D(m_instance, pp::Graphics3D(), attribs);
        if (m_graphics3d.is_null())
        {
            glSetCurrentContextPPAPI(0);
            return false;
        }
        bool rtn = m_instance->BindGraphics(m_graphics3d);
        assert(rtn && "BindGraphics failed");
        if (!rtn)
          return false;
    }

    CCLOG("glSetCurrentContextPPAPI: %p", (void*)m_graphics3d.pp_resource());
    glSetCurrentContextPPAPI(m_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);
    m_size.SetSize(width, height);
    if (!m_graphics3d.is_null())
    {
        m_graphics3d.ResizeBuffers(width, height);
    }
}

void OpenGLContext::FlushContext()
{
    //CCLOG("OpenGLContext::FlushContext");
    m_graphics3d.SwapBuffers(pp::BlockUntilComplete());
}


NS_CC_BEGIN

CCEGLView::CCEGLView() : bIsInit(false), bIsMouseDown(false), m_fFrameZoomFactor(1.0f), m_context(NULL)
{
    CCLOG("CCEGLView::CCEGLView");
    pthread_mutex_init(&m_mutex, NULL);
    initGL();
}

CCEGLView::~CCEGLView()
{
}

void CCEGLView::setFrameSize(float width, float height)
{
    CCEGLViewProtocol::setFrameSize(width, height);
    if (m_context)
      m_context->ResizeContext(width, height);
}

void CCEGLView::setViewPortInPoints(float x , float y , float w , float h)
{
    glViewport((GLint)(x * m_fScaleX * m_fFrameZoomFactor+ m_obViewPortRect.origin.x * m_fFrameZoomFactor),
            (GLint)(y * m_fScaleY * m_fFrameZoomFactor + m_obViewPortRect.origin.y * m_fFrameZoomFactor),
            (GLsizei)(w * m_fScaleX * m_fFrameZoomFactor),
            (GLsizei)(h * m_fScaleY * m_fFrameZoomFactor));
}

void CCEGLView::setScissorInPoints(float x , float y , float w , float h)
{
    glScissor((GLint)(x * m_fScaleX * m_fFrameZoomFactor + m_obViewPortRect.origin.x * m_fFrameZoomFactor),
            (GLint)(y * m_fScaleY * m_fFrameZoomFactor + m_obViewPortRect.origin.y * m_fFrameZoomFactor),
            (GLsizei)(w * m_fScaleX * m_fFrameZoomFactor),
            (GLsizei)(h * m_fScaleY * m_fFrameZoomFactor));
}


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

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

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

    m_context->FlushContext();
}

void CCEGLView::setIMEKeyboardState(bool bOpen)
{
}

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

void CCEGLView::destroyGL()
{
    delete m_context;
    bIsInit = false;
    CCLOG("destroyGL");
}

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

void CCEGLView::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
    CCSize 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 CCEGLView::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 != m_context->GetSize())
    {
        setFrameSize(size.width(), size.height());
    }

    pthread_mutex_lock(&m_mutex);
    while (m_event_queue.size())
    {
        pp::InputEvent event = m_event_queue.front();
        m_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(&m_mutex);
}

void CCEGLView::AddEvent(const pp::InputEvent& event)
{
    pthread_mutex_lock(&m_mutex);
    m_event_queue.push(event);
    pthread_mutex_unlock(&m_mutex);
}

CocosPepperInstance* CCEGLView::g_instance;

NS_CC_END