/*
        vid_sdl.c

	Video driver for Sam Lantinga's Simple DirectMedia Layer

	Copyright (C) 1996-1997  Id Software, Inc.

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <SDL/SDL.h>

#include "bothdefs.h"   // needed by: common.h, net.h, client.

#include "quakedef.h"
#include "menu.h"
#include "vid.h"
#include "sys.h"
#include "mathlib.h"    // needed by: protocol.h, render.h, client.h,
			//  modelgen.h, glmodel.h
#include "wad.h"
#include "draw.h"
#include "cvar.h"
#include "net.h"        // needed by: client.h
#include "protocol.h"   // needed by: client.h
#include "cmd.h"
#include "keys.h"
#include "sbar.h"
#include "sound.h"
#include "render.h"     // needed by: client.h, gl_model.h, glquake.h
#include "client.h"     // need cls in this file
#include "console.h"
#include "qendian.h"
#include "qargs.h"
#include "compat.h"
#include "d_local.h"
#include "input.h"


cvar_t	*_windowed_mouse;

int old_windowed_mouse;

// static float oldin_grab = 0;

extern viddef_t    vid;                // global video state
unsigned short  d_8to16table[256];

#ifdef WIN32
// fixme: this is evil...
#include <windows.h>
HWND 		mainwindow;
#endif

int modestate; // fixme: just to avoid cross-comp. errors - remove later
                                                        
// The original defaults
//#define    BASEWIDTH    320
//#define    BASEHEIGHT   200
// Much better for high resolution displays
#define    BASEWIDTH    (320*2)
#define    BASEHEIGHT   (200*2)

int    VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes = 0;
byte    *VGA_pagebase;

static SDL_Surface *screen = NULL;

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

void    VID_SetPalette (unsigned char *palette)
{
    int i;
    SDL_Color colors[256];

    for ( i=0; i<256; ++i )
    {
        colors[i].r = *palette++;
        colors[i].g = *palette++;
        colors[i].b = *palette++;
    }
    SDL_SetColors(screen, colors, 0, 256);
}

void    VID_ShiftPalette (unsigned char *palette)
{
    VID_SetPalette(palette);
}

void    VID_Init (unsigned char *palette)
{
    int pnum, chunk;
    byte *cache;
    int cachesize;
    //Uint8 video_bpp;
    //Uint16 video_w, video_h;
    Uint32 flags;


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

    // Set up display mode (width and height)
    vid.width = BASEWIDTH;
    vid.height = BASEHEIGHT;
    vid.maxwarpwidth = WARP_WIDTH;
    vid.maxwarpheight = WARP_HEIGHT;
    if ((pnum=COM_CheckParm("-winsize")))
    {
        if (pnum >= com_argc-2)
            Sys_Error("VID: -winsize <width> <height>\n");
        vid.width = atoi(com_argv[pnum+1]);
        vid.height = atoi(com_argv[pnum+2]);
        if (!vid.width || !vid.height)
            Sys_Error("VID: Bad window width/height\n");
    }

    // Set video width, height and flags
    flags = (SDL_SWSURFACE|SDL_HWPALETTE);
    if ( COM_CheckParm ("-fullscreen") )
        flags |= SDL_FULLSCREEN;

    // Initialize display
    if (!(screen = SDL_SetVideoMode(vid.width, vid.height, 8, flags)))
        Sys_Error("VID: Couldn't set video mode: %s\n", SDL_GetError());
    VID_SetPalette(palette);
    VID_SetCaption("sdlquakeworld");

    // now know everything we need to know about the buffer
    VGA_width = vid.conwidth = vid.width;
    VGA_height = vid.conheight = vid.height;
    vid.aspect = ((float)vid.height / (float)vid.width) * (320.0 / 240.0);
    vid.numpages = 1;
    vid.colormap = host_colormap;
    vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));
    VGA_pagebase = vid.buffer = screen->pixels;
    VGA_rowbytes = vid.rowbytes = screen->pitch;
    vid.conbuffer = vid.buffer;
    vid.conrowbytes = vid.rowbytes;
    vid.direct = 0;

    // allocate z buffer and surface cache
    chunk = vid.width * vid.height * sizeof (*d_pzbuffer);
    cachesize = D_SurfaceCacheForRes (vid.width, vid.height);
    chunk += cachesize;
    d_pzbuffer = Hunk_HighAllocName(chunk, "video");
    if (d_pzbuffer == NULL)
        Sys_Error ("Not enough memory for video mode\n");

    // initialize the cache memory
        cache = (byte *) d_pzbuffer
                + vid.width * vid.height * sizeof (*d_pzbuffer);
    D_InitCaches (cache, cachesize);

    // initialize the mouse
    SDL_ShowCursor(0);

#ifdef WIN32
        // fixme: EVIL thing - but needed for win32 until we get
        // SDL_sound ready - without this DirectSound fails.
        // could replace this with SDL_SysWMInfo
	mainwindow=GetActiveWindow();
#endif

}

void    VID_Shutdown (void)
{
    SDL_Quit();
}

void    VID_Update (vrect_t *rects)
{
    SDL_Rect *sdlrects;
    int n, i;
    vrect_t *rect;

    // Two-pass system, since Quake doesn't do it the SDL way...

    // First, count the number of rectangles
    n = 0;
    for (rect = rects; rect; rect = rect->pnext)
        ++n;

    // Second, copy them to SDL rectangles and update
	if(!(sdlrects=(SDL_Rect *)calloc(1,n*sizeof(SDL_Rect))))
        	Sys_Error("Out of memory!");
    i = 0;
    for (rect = rects; rect; rect = rect->pnext)
    {
        sdlrects[i].x = rect->x;
        sdlrects[i].y = rect->y;
        sdlrects[i].w = rect->width;
        sdlrects[i].h = rect->height;
        ++i;
    }
    SDL_UpdateRects(screen, n, sdlrects);
}

/*
================
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);
}


/*
================
IN_SendKeyEvents
================
*/

void IN_SendKeyEvents (void)
{
	SDL_Event event;
	int sym, state, but;
	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_CAPSLOCK: sym = K_CAPSLOCK; 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_MOUSEBUTTONDOWN:
	    case SDL_MOUSEBUTTONUP:
		but = event.button.button;
		if (but == 2)
			but = 3;
		else if (but == 3)
			but = 2;

		switch (but)
		{
			case 1:
			case 2:
			case 3:
				 Key_Event(K_MOUSE1 + but - 1, event.type
						 == SDL_MOUSEBUTTONDOWN);
				 break;
			case 4:
				 Key_Event(K_MWHEELUP, 1);
				 Key_Event(K_MWHEELUP, 0);
				 break;
			case 5:
				 Key_Event(K_MWHEELDOWN, 1);
				 Key_Event(K_MWHEELDOWN, 0);
				 break;
		}
		break;

            case SDL_MOUSEMOTION:
                if (_windowed_mouse->value)
		{
		   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);
		   }
                }
		else
		{
			mouse_x = event.motion.xrel*10;
			mouse_y = event.motion.yrel*10;
		}
                break;

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


void
IN_Commands (void)
{
	if (old_windowed_mouse != _windowed_mouse->value)
	{
		old_windowed_mouse = _windowed_mouse->value;
		if (!_windowed_mouse->value)
			SDL_WM_GrabInput (SDL_GRAB_OFF);
		else
			SDL_WM_GrabInput (SDL_GRAB_ON);
	}
}

void IN_Init (void)
{
    _windowed_mouse = Cvar_Get ("_windowed_mouse","0",CVAR_ARCHIVE,"None");

    if ( COM_CheckParm("-nomouse") && !_windowed_mouse->value)
        return;

    mouse_x = mouse_y = 0.0;
    mouse_avail = 1;
}

void IN_Shutdown (void)
{
    mouse_avail = 0;
}

void IN_Frame(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;
}


void VID_InitCvars ()
{
	// It may not look like it, but this is important
}

void    
VID_LockBuffer ( void )
{       
}       

void
VID_UnlockBuffer ( void )
{       
}       

void
VID_SetCaption (char *text)
{
        SDL_WM_SetCaption(text, NULL);
}