// gl_vidsdl.c -- sdl opengl video driver 


// dynamic library access
#include <dlfcn.h>

#include <SDL.h>
#include <SDL/SDL_opengl.h>

#include "quakedef.h"

viddef_t    vid;                // global video state


// The original defaults
//#define    BASEWIDTH    320
//#define    BASEHEIGHT   200
// Much better for high resolution displays
#define    BASEWIDTH    (640)
#define    BASEHEIGHT   (480)

static qboolean mouse_avail;
static float   mouse_x, mouse_y;
static int mouse_oldbuttonstate = 0;

// No support for option menus
void (*vid_menudrawfn)(void) = NULL;
void (*vid_menukeyfn)(int key) = NULL;

static int scr_width, scr_height;

#define WARP_WIDTH              320
#define WARP_HEIGHT             200

static SDL_Surface *screen = NULL;

/*-----------------------------------------------------------------------*/


/*
=================
GL_BeginRendering

=================
*/
void GL_BeginRendering (int *x, int *y, int *width, int *height)
{
	extern cvar_t gl_clear;

	*x = *y = 0;
	*width = scr_width;
	*height = scr_height;

//    if (!wglMakeCurrent( maindc, baseRC ))
//		Sys_Error ("wglMakeCurrent failed");

//	glViewport (*x, *y, *width, *height);
}


void GL_EndRendering (void)
{
        glFlush ();
        SDL_GL_SwapBuffers ();
}

static void Check_Gamma (unsigned char *pal)
{
	float	f, inf;
	unsigned char	palette[768];
	int		i;

	if ((i = COM_CheckParm("-gamma")) == 0) {
		if ((gl_renderer && strstr(gl_renderer, "Voodoo")) ||
			(gl_vendor && strstr(gl_vendor, "3Dfx")))
			vid_gamma = 1;
		else
		        vid_gamma = 0.6; // default to 0.7 on non-3dfx hardware
		                         // PENTA: lowered to make things a little brighter
	} else
		vid_gamma = Q_atof(com_argv[i+1]);

	for (i=0 ; i<768 ; i++)
	{
		f = pow ( (pal[i]+1)/256.0 , vid_gamma );
		inf = f*255 + 0.5;
		if (inf < 0)
			inf = 0;
		if (inf > 255)
			inf = 255;
		palette[i] = inf;
	}

	memcpy (pal, palette, sizeof(palette));
}


void    VID_Init (unsigned char *palette)
{
    int pnum, chunk;
    byte *cache;
    int cachesize;
    Uint8 video_bpp;
    Uint16 video_w, video_h;
    Uint32 flags;
    const SDL_VideoInfo* info = NULL;
    char	gldir[MAX_OSPATH];

    // Load the SDL library
    if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO|SDL_INIT_CDROM) < 0)
        Sys_Error("VID: Couldn't load SDL: %s", SDL_GetError());

    // Get Video info
    info=SDL_GetVideoInfo ();
    if( !info ) {
      Sys_Error ("Video query failed: %s\n", SDL_GetError ());
    }
    video_bpp = 32; // 32 bpp mandatory

    // Define some necessary OpenGL features  
    SDL_GL_SetAttribute (SDL_GL_RED_SIZE, 8);
    SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, 8);
    SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 8);
    SDL_GL_SetAttribute (SDL_GL_ALPHA_SIZE, 8);
    SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 24);
    SDL_GL_SetAttribute (SDL_GL_STENCIL_SIZE, 8);
    SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);

   // Set up display mode (width and height)
    vid.width = BASEWIDTH;
    vid.height = BASEHEIGHT;
    vid.maxwarpwidth = WARP_WIDTH;
    vid.maxwarpheight = WARP_HEIGHT;
    vid.colormap = host_colormap;
    //vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));

    if ((pnum=COM_CheckParm("-winsize")))
    {
        if (pnum >= com_argc-2)
            Sys_Error("VID: -winsize <width> <height>\n");
        vid.width = Q_atoi(com_argv[pnum+1]);
        vid.height = Q_atoi(com_argv[pnum+2]);
        if (!vid.width || !vid.height)
            Sys_Error("VID: Bad window width/height\n");
    }
    if ((pnum=COM_CheckParm("-width")))
    {
        if (pnum >= com_argc-1)
            Sys_Error("VID: -width <width>\n");
        vid.width = Q_atoi(com_argv[pnum+1]);
        if (!vid.width)
            Sys_Error("VID: Bad window width\n");
    }
    if ((pnum=COM_CheckParm("-height")))
    {
        if (pnum >= com_argc-1)
            Sys_Error("VID: -height <height>\n");
        vid.height = Q_atoi(com_argv[pnum+1]);
        if (!vid.height)
            Sys_Error("VID: Bad window height\n");
    }
    // Set video width, height and flags

    flags = SDL_OPENGL;
    if ( !COM_CheckParm ("-window") )
        flags |= SDL_FULLSCREEN;

    // Initialize display 
    if (!(screen = SDL_SetVideoMode(vid.width, vid.height, video_bpp, flags)))
        Sys_Error("VID: Couldn't set video mode: %s\n", SDL_GetError());

    scr_width = vid.width;
    scr_height = vid.height;

    vid.conheight = vid.height;
    vid.conwidth = vid.width;

    /*
    if (vid.conheight > vid.height)
      vid.conheight = vid.height;
    if (vid.conwidth > vid.width)
      vid.conwidth = vid.width;
    */
    
    vid.aspect = ((float)vid.height / (float)vid.width) * (320.0 / 240.0);
    vid.numpages = 2;

    // Initialize OpenGL
    GL_Init ();
    
    sprintf (gldir, "%s/glquake", com_gamedir);
    Sys_mkdir (gldir);
 
    VID_SetPalette(palette);
    SDL_WM_SetCaption("tenebrae-sdl","tenebrae-sdl");

    // Check for 3DFX Extensions and initialize them.
    //VID_Init8bitPalette();
    
    Con_SafePrintf ("Video mode %dx%d initialized.\n", vid.width, vid.height);
    
    vid.recalc_refdef = 1;				// force a surface cache flush    
    
    // initialize the mouse
    SDL_ShowCursor(0);
}

void    VID_Shutdown (void)
{
    R_ShutdownShaders();
    SDL_Quit();
}

/*
================
D_BeginDirectRect
================
*/
void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
  /*
    Uint8 *offset;


    if (!screen) return;
    if ( x < 0 ) x = screen->w+x-1;
    offset = (Uint8 *)screen->pixels + y*screen->pitch + x;
    while ( height-- )
    {
        memcpy(offset, pbitmap, width);
        offset += screen->pitch;
        pbitmap += width;
    }
  */
}


/*
================
D_EndDirectRect
================
*/
void D_EndDirectRect (int x, int y, int width, int height)
{
  /*
    if (!screen) return;
    if (x < 0) x = screen->w+x-1;
    SDL_UpdateRect(screen, x, y, width, height);
  */
}


/*
================
Sys_SendKeyEvents
================
*/

void Sys_SendKeyEvents(void)
{
    SDL_Event event;
    int sym, state;
     int modstate;

    while (SDL_PollEvent(&event))
    {
        switch (event.type) {

            case SDL_KEYDOWN:
            case SDL_KEYUP:
                sym = event.key.keysym.sym;
                state = event.key.state;
                modstate = SDL_GetModState();
                switch(sym)
                {
                   case SDLK_DELETE: sym = K_DEL; break;
                   case SDLK_BACKSPACE: sym = K_BACKSPACE; break;
                   case SDLK_F1: sym = K_F1; break;
                   case SDLK_F2: sym = K_F2; break;
                   case SDLK_F3: sym = K_F3; break;
                   case SDLK_F4: sym = K_F4; break;
                   case SDLK_F5: sym = K_F5; break;
                   case SDLK_F6: sym = K_F6; break;
                   case SDLK_F7: sym = K_F7; break;
                   case SDLK_F8: sym = K_F8; break;
                   case SDLK_F9: sym = K_F9; break;
                   case SDLK_F10: sym = K_F10; break;
                   case SDLK_F11: sym = K_F11; break;
                   case SDLK_F12: sym = K_F12; break;
                   case SDLK_BREAK:
                   case SDLK_PAUSE: sym = K_PAUSE; break;
                   case SDLK_UP: sym = K_UPARROW; break;
                   case SDLK_DOWN: sym = K_DOWNARROW; break;
                   case SDLK_RIGHT: sym = K_RIGHTARROW; break;
                   case SDLK_LEFT: sym = K_LEFTARROW; break;
                   case SDLK_INSERT: sym = K_INS; break;
                   case SDLK_HOME: sym = K_HOME; break;
                   case SDLK_END: sym = K_END; break;
                   case SDLK_PAGEUP: sym = K_PGUP; break;
                   case SDLK_PAGEDOWN: sym = K_PGDN; break;
                   case SDLK_RSHIFT:
                   case SDLK_LSHIFT: sym = K_SHIFT; break;
                   case SDLK_RCTRL:
                   case SDLK_LCTRL: sym = K_CTRL; break;
                   case SDLK_RALT:
                   case SDLK_LALT: sym = K_ALT; break;
                   case SDLK_KP0: 
                       if(modstate & KMOD_NUM) sym = K_INS; 
                       else sym = SDLK_0;
                       break;
                   case SDLK_KP1:
                       if(modstate & KMOD_NUM) sym = K_END;
                       else sym = SDLK_1;
                       break;
                   case SDLK_KP2:
                       if(modstate & KMOD_NUM) sym = K_DOWNARROW;
                       else sym = SDLK_2;
                       break;
                   case SDLK_KP3:
                       if(modstate & KMOD_NUM) sym = K_PGDN;
                       else sym = SDLK_3;
                       break;
                   case SDLK_KP4:
                       if(modstate & KMOD_NUM) sym = K_LEFTARROW;
                       else sym = SDLK_4;
                       break;
                   case SDLK_KP5: sym = SDLK_5; break;
                   case SDLK_KP6:
                       if(modstate & KMOD_NUM) sym = K_RIGHTARROW;
                       else sym = SDLK_6;
                       break;
                   case SDLK_KP7:
                       if(modstate & KMOD_NUM) sym = K_HOME;
                       else sym = SDLK_7;
                       break;
                   case SDLK_KP8:
                       if(modstate & KMOD_NUM) sym = K_UPARROW;
                       else sym = SDLK_8;
                       break;
                   case SDLK_KP9:
                       if(modstate & KMOD_NUM) sym = K_PGUP;
                       else sym = SDLK_9;
                       break;
                   case SDLK_KP_PERIOD:
                       if(modstate & KMOD_NUM) sym = K_DEL;
                       else sym = SDLK_PERIOD;
                       break;
                   case SDLK_KP_DIVIDE: sym = SDLK_SLASH; break;
                   case SDLK_KP_MULTIPLY: sym = SDLK_ASTERISK; break;
                   case SDLK_KP_MINUS: sym = SDLK_MINUS; break;
                   case SDLK_KP_PLUS: sym = SDLK_PLUS; break;
                   case SDLK_KP_ENTER: sym = SDLK_RETURN; break;
                   case SDLK_KP_EQUALS: sym = SDLK_EQUALS; break;
                }
                // If we're not directly handled and still above 255
                // just force it to 0
                if(sym > 255) sym = 0;
                Key_Event(sym, state);
                break;

            case SDL_MOUSEMOTION:
                if ( (event.motion.x != (vid.width/2)) ||
                     (event.motion.y != (vid.height/2)) ) {
                    mouse_x = event.motion.xrel*10;
                    mouse_y = event.motion.yrel*10;
                    if ( (event.motion.x < ((vid.width/2)-(vid.width/4))) ||
                         (event.motion.x > ((vid.width/2)+(vid.width/4))) ||
                         (event.motion.y < ((vid.height/2)-(vid.height/4))) ||
                         (event.motion.y > ((vid.height/2)+(vid.height/4))) ) {
                        SDL_WarpMouse(vid.width/2, vid.height/2);
                    }
                }
                break;

            case SDL_QUIT:
                CL_Disconnect ();
                Host_ShutdownServer(false);        
                Sys_Quit ();
                break;
            default:
                break;
        }
    }
}

void IN_Init (void)
{
    if ( COM_CheckParm ("-nomouse") )
        return;
    mouse_x = mouse_y = 0.0;
    mouse_avail = 1;
}

void IN_Shutdown (void)
{
    mouse_avail = 0;
}

void IN_Commands (void)
{
    int i;
    int mouse_buttonstate;
   
    if (!mouse_avail) return;
   
    i = SDL_GetMouseState(NULL, NULL);
    /* Quake swaps the second and third buttons */
    mouse_buttonstate = (i & ~0x06) | ((i & 0x02)<<1) | ((i & 0x04)>>1);
    for (i=0 ; i<3 ; i++) {
        if ( (mouse_buttonstate & (1<<i)) && !(mouse_oldbuttonstate & (1<<i)) )
            Key_Event (K_MOUSE1 + i, true);

        if ( !(mouse_buttonstate & (1<<i)) && (mouse_oldbuttonstate & (1<<i)) )
            Key_Event (K_MOUSE1 + i, false);
    }
    mouse_oldbuttonstate = mouse_buttonstate;
}

void IN_Move (usercmd_t *cmd)
{
    if (!mouse_avail)
        return;
   
    mouse_x *= sensitivity.value;
    mouse_y *= sensitivity.value;
   
    if ( (in_strafe.state & 1) || (lookstrafe.value && (in_mlook.state & 1) ))
        cmd->sidemove += m_side.value * mouse_x;
    else
        cl.viewangles[YAW] -= m_yaw.value * mouse_x;
    if (in_mlook.state & 1)
        V_StopPitchDrift ();
   
    if ( (in_mlook.state & 1) && !(in_strafe.state & 1)) {
        cl.viewangles[PITCH] += m_pitch.value * mouse_y;
        if (cl.viewangles[PITCH] > 80)
            cl.viewangles[PITCH] = 80;
        if (cl.viewangles[PITCH] < -70)
            cl.viewangles[PITCH] = -70;
    } else {
        if ((in_strafe.state & 1) && noclip_anglehack)
            cmd->upmove -= m_forward.value * mouse_y;
        else
            cmd->forwardmove -= m_forward.value * mouse_y;
    }
    mouse_x = mouse_y = 0.0;
}

/*
================
Sys_ConsoleInput
================
*/
char *Sys_ConsoleInput (void)
{
    return 0;
}