source: trunk/src/gl/gl_window.cc @ 121

// Copyright (C) 2012-2013 Kornel Kisielewicz
// This file is part of NV Libraries.
// For conditions of distribution and use, see copyright notice in nv.hh

#include "nv/gl/gl_window.hh"

#include "nv/logging.hh"
#include "nv/lib/gl.hh"
#include "nv/lib/sdl12.hh"

using namespace nv;

static bool sdl_key_event_to_io_event( const SDL_KeyboardEvent& ke, io_event& kevent )
{
        kevent.type        = EV_KEY;
        kevent.key.pressed = ( ke.state != SDL_RELEASED );
        kevent.key.ascii   = 0;
        kevent.key.code    = KEY_NONE;

        // if result is a typable char place it into the structure
        if (ke.keysym.unicode >= 32 && ke.keysym.unicode < 128 )
        {
                kevent.key.ascii = static_cast<char8>( ke.keysym.unicode );
        }

        // Get the Key value from the SDL Keyboard event
        int result = ke.keysym.sym;

        // Check the control and shift states
        kevent.key.alt     = (ke.keysym.mod & KMOD_ALT ) != 0;
        kevent.key.control = (ke.keysym.mod & KMOD_CTRL ) != 0;
        kevent.key.shift   = (ke.keysym.mod & KMOD_SHIFT ) != 0;

        // if result is a typable char from the directly transformable ranges
        if ( ( result >= KEY_A && result <= KEY_Z ) || 
                ( result >= KEY_0 && result <= KEY_9 ) ||
                result == ' ' )
        {
                kevent.key.code = static_cast<key_code>(result);
        }

        // if result is a typable char from the a..z range
        if ( result >= KEY_A + 32 && result <= KEY_Z + 32 )
        {
                kevent.key.code = static_cast<key_code>(result - 32);
        }

        if ( result >= SDLK_F1 && result <= SDLK_F12 )
        {
                kevent.key.code = static_cast<key_code>(result - SDLK_F1 + KEY_F1 );
        }

        // other recognized codes
        switch ( result ) 
        {
        case SDLK_BACKSPACE    : kevent.key.code = KEY_BACK; break;
        case SDLK_TAB          : kevent.key.code = KEY_TAB; break;
        case SDLK_RETURN       : kevent.key.code = KEY_ENTER; break;
        case SDLK_PAGEUP       : kevent.key.code = KEY_PGUP; break;
        case SDLK_PAGEDOWN     : kevent.key.code = KEY_PGDOWN; break;
        case SDLK_END          : kevent.key.code = KEY_END; break;
        case SDLK_HOME         : kevent.key.code = KEY_HOME; break;
        case SDLK_LEFT         : kevent.key.code = KEY_LEFT; break;
        case SDLK_UP           : kevent.key.code = KEY_UP; break;
        case SDLK_RIGHT        : kevent.key.code = KEY_RIGHT; break;
        case SDLK_DOWN         : kevent.key.code = KEY_DOWN; break;
        case SDLK_DELETE       : kevent.key.code = KEY_DELETE; break;
        case SDLK_INSERT       : kevent.key.code = KEY_INSERT; break;
        case SDLK_KP5          : kevent.key.code = KEY_CENTER; break;
        case SDLK_ESCAPE       : kevent.key.code = KEY_ESCAPE; break;
        case SDLK_QUOTE        : kevent.key.code = KEY_QUOTE; break;
        case SDLK_COMMA        : kevent.key.code = KEY_COMMA; break;
        case SDLK_MINUS        : kevent.key.code = KEY_MINUS; break;
        case SDLK_PERIOD       : kevent.key.code = KEY_PERIOD; break;
        case SDLK_SLASH        : kevent.key.code = KEY_SLASH; break;
        case SDLK_SEMICOLON    : kevent.key.code = KEY_SCOLON; break;
        case SDLK_LEFTBRACKET  : kevent.key.code = KEY_LBRACKET; break;
        case SDLK_BACKSLASH    : kevent.key.code = KEY_BSLASH; break;
        case SDLK_RIGHTBRACKET : kevent.key.code = KEY_RBRACKET; break;
        case SDLK_BACKQUOTE    : kevent.key.code = KEY_BQUOTE; break;
        default : break;
        }

        // If key was understood by nv, then it's valid, otherwise ignored
        return kevent.key.ascii != 0 || kevent.key.code != 0;
}

static bool sdl_mouse_button_to_io_event( const SDL_MouseButtonEvent& mb, io_event& mevent )
{
        mevent.type            = EV_MOUSE_BUTTON;
        mevent.mbutton.button  = MOUSE_NONE;
        mevent.mbutton.pressed = (mb.state != SDL_RELEASED);
        mevent.mbutton.x       = mb.x;
        mevent.mbutton.y       = mb.y;

        switch ( mb.button )
        {
        case SDL_BUTTON_LEFT      : mevent.mbutton.button = MOUSE_LEFT; break;
        case SDL_BUTTON_MIDDLE    : mevent.mbutton.button = MOUSE_MIDDLE; break;
        case SDL_BUTTON_RIGHT     : mevent.mbutton.button = MOUSE_RIGHT; break;
        case SDL_BUTTON_WHEELUP   : mevent.mbutton.button = MOUSE_WHEEL_UP; break;
        case SDL_BUTTON_WHEELDOWN : mevent.mbutton.button = MOUSE_WHEEL_DOWN; break;
        default : break;
        }

        return mevent.mbutton.button != MOUSE_NONE;
}

static bool sdl_mouse_motion_to_io_event( const SDL_MouseMotionEvent& mm, io_event& mevent )
{
        mevent.type          = EV_MOUSE_MOVE;
        mevent.mmove.pressed = (mm.state != SDL_RELEASED);
        mevent.mmove.x       = mm.x;
        mevent.mmove.y       = mm.y;
        return true;
}

static bool sdl_event_to_io_event( const SDL_Event& e, io_event& ioevent )
{
        switch ( e.type )
        {
        case SDL_KEYDOWN         : return sdl_key_event_to_io_event( e.key, ioevent );
        case SDL_KEYUP           : return sdl_key_event_to_io_event( e.key, ioevent );
        case SDL_MOUSEMOTION     : return sdl_mouse_motion_to_io_event( e.motion, ioevent );
        case SDL_MOUSEBUTTONDOWN : return sdl_mouse_button_to_io_event( e.button, ioevent );
        case SDL_MOUSEBUTTONUP   : return sdl_mouse_button_to_io_event( e.button, ioevent );
        case SDL_ACTIVEEVENT     : 
                ioevent.type = EV_ACTIVE; 
                ioevent.active.gain = (e.active.gain != 0); 
                return e.active.state == SDL_APPINPUTFOCUS;
        case SDL_VIDEORESIZE     : 
                ioevent.type     = EV_RESIZE; 
                ioevent.resize.x = e.resize.w;
                ioevent.resize.y = e.resize.h;
                return true;
        case SDL_SYSWMEVENT      : ioevent.type = EV_SYSTEM; return true;
        case SDL_QUIT            : ioevent.type = EV_QUIT;   return true;
        case SDL_NOEVENT         : return false;
        case SDL_VIDEOEXPOSE     : return false;
        case SDL_JOYAXISMOTION   : return false;
        case SDL_JOYBALLMOTION   : return false;
        case SDL_JOYHATMOTION    : return false;
        case SDL_JOYBUTTONDOWN   : return false;
        case SDL_JOYBUTTONUP     : return false;
        default : return false;
        }
}


gl_window::gl_window( device* dev, uint16 width, uint16 height )
        : m_device( dev ), m_width( width ), m_height( height ), m_title("NV Engine"), m_screen( nullptr )
{
        uint32 flags = SDL_OPENGL;
        
        m_screen = SDL_SetVideoMode( width, height, 32, flags );
        
        if ( m_screen == 0 )
        {
                NV_LOG( LOG_CRITICAL, "Video mode set failed: " << SDL_GetError( ) );
                return; // TODO: Error report
        }

        nv::load_gl_library();
        NV_LOG( LOG_INFO, "OpenGL Vendor       : " << glGetString(GL_VENDOR) );
        NV_LOG( LOG_INFO, "OpenGL Renderer     : " << glGetString(GL_RENDERER) );
        NV_LOG( LOG_INFO, "OpenGL Version      : " << glGetString(GL_VERSION) );
        NV_LOG( LOG_INFO, "OpenGL GLSL Version : " << glGetString(GL_SHADING_LANGUAGE_VERSION) );

        m_context = new gl_context();
        m_context->set_viewport( nv::ivec4( 0, 0, m_width, m_height ) );
}

uint16 gl_window::get_width() const
{
        return m_width;
}

uint16 gl_window::get_height() const
{
        return m_height;
}

string gl_window::get_title() const
{
        return m_title;
}

void gl_window::set_title( const string& title )
{
        SDL_WM_SetCaption( title.c_str(), title.c_str() );
        m_title = title;
}

bool gl_window::is_event_pending()
{
        return SDL_PollEvent( nullptr ) != 0;
}

bool gl_window::poll_event( io_event& event )
{
        SDL_Event sdl_event;
        if ( SDL_PollEvent( &sdl_event ) == 0 ) return false;
        return sdl_event_to_io_event( sdl_event, event );
}

void gl_window::swap_buffers()
{
        SDL_GL_SwapBuffers();
}

gl_window::~gl_window()
{
        delete m_context;
}