/************************************************************************************

Filename    :   Platform_Linux.h
Content     :   Linux (X11) implementation of Platform app infrastructure
Created     :   September 6, 2012
Authors     :   Andrew Reisse

Copyright   :   Copyright 2012 Oculus VR, Inc. All Rights reserved.

Use of this software is subject to the terms of the Oculus LLC license
agreement provided at the time of installation or download, or which
otherwise accompanies this software in either electronic or hard copy form.

************************************************************************************/

#ifndef OVR_Platform_Linux_h
#define OVR_Platform_Linux_h

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/glx.h>

#include "Platform.h"
#include "../Render/Render_GL_Device.h"

namespace OVR { namespace Render {
    class RenderDevice;
}}

namespace OVR { namespace Platform { namespace Linux {

class PlatformCore : public Platform::PlatformCore
{
public:
    Display*     Disp;
    XVisualInfo* Vis;
    Window       Win;

    bool         Quit;
    int          ExitCode;
    int          Width, Height;

    MouseMode    MMode;
    Cursor       InvisibleCursor;

    enum
    {
        WM_PROTOCOLS,
        WM_DELETE_WINDOW,
        NumAtoms
    };
    Atom Atoms[NumAtoms];

    void processEvent(XEvent& event);

    Render::RenderDevice* SetupGraphics_GL(const Render::RendererParams& rp);

    void showCursor(bool show);
    bool determineScreenOffset(int screenId, int* screenOffsetX, int* screenOffsetY);
    void showWindowDecorations(bool show);

public:
    PlatformCore(Application* app);
    ~PlatformCore();

    bool      SetupWindow(int w, int h);
    void      Exit(int exitcode) { Quit = 1; ExitCode = exitcode; }

    RenderDevice* SetupGraphics(const SetupGraphicsDeviceSet& setupGraphicsDesc,
                                const char* gtype, const Render::RendererParams& rp);

    void      SetMouseMode(MouseMode mm);
    void      GetWindowSize(int* w, int* h) const;

    void      SetWindowTitle(const char*title);

    void      ShowWindow(bool show);
    void      DestroyWindow();
    bool      SetFullscreen(const Render::RendererParams& rp, int fullscreen);
    int  Run();
};

}}
namespace Render { namespace GL { namespace Linux {

class RenderDevice : public Render::GL::RenderDevice
{
    Display*   Disp;
    Window     Win;
    GLXContext Context;

public:
    RenderDevice(const Render::RendererParams& p, Display* disp, Window w, GLXContext gl)
    : GL::RenderDevice(p), Disp(disp), Win(w), Context(gl) {}

    virtual void Shutdown();
    virtual void Present();

    // oswnd = Linux::PlatformCore*
    static Render::RenderDevice* CreateDevice(const RendererParams& rp, void* oswnd);
};

}}}}


// OVR_PLATFORM_APP_ARGS specifies the Application class to use for startup,
// providing it with startup arguments.
#define OVR_PLATFORM_APP_ARGS(AppClass, args)                                            \
    OVR::Platform::Application* OVR::Platform::Application::CreateApplication()          \
    { OVR::System::Init(OVR::Log::ConfigureDefaultLog(OVR::LogMask_All));                \
      return new AppClass args; }                                                        \
    void OVR::Platform::Application::DestroyApplication(OVR::Platform::Application* app) \
    { OVR::Platform::PlatformCore* platform = app->pPlatform;                            \
      delete app; delete platform; OVR::System::Destroy(); };

// OVR_PLATFORM_APP_ARGS specifies the Application startup class with no args.
#define OVR_PLATFORM_APP(AppClass) OVR_PLATFORM_APP_ARGS(AppClass, ())


#endif