/*
	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.h>

#include "client.h"
#include "va.h"
#include "console.h"
#include "cvar.h"
#include "draw.h"
#include "d_iface.h"
#include "d_local.h"
#include "input.h"
#include "joystick.h"
#include "keys.h"
#include "menu.h"
#include "sys.h"
#include "qargs.h"
#include "qendian.h"
#include "qtypes.h"
#include "quakedef.h"

cvar_t	*_windowed_mouse;
cvar_t	*vid_fullscreen;

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_InitBuffers (int width, int height)
{
	int		tbuffersize, tcachesize;
	void	*vid_surfcache;

	// Calculate the sizes we want first
	tbuffersize = vid.width * vid.height * sizeof (*d_pzbuffer);
	tcachesize = D_SurfaceCacheForRes(width, height);

	// Free the old z-buffer
	if (d_pzbuffer) {
		free (d_pzbuffer);
		d_pzbuffer = NULL;
	}
	
	// Free the old surface cache
	vid_surfcache = D_SurfaceCacheAddress ();
	if (vid_surfcache) {
		D_FlushCaches ();
		free (vid_surfcache);
		vid_surfcache = NULL;
	}

	// Allocate the new z-buffer
	d_pzbuffer = calloc (tbuffersize, 1);
	if (!d_pzbuffer) {
		Sys_Error ("Not enough memory for video mode\n");
	}

	// Allocate the new surface cache; free the z-buffer if we fail
	vid_surfcache = calloc (tcachesize, 1);
	if (!vid_surfcache) {
		free (d_pzbuffer);
		d_pzbuffer = NULL;
		Sys_Error ("Not enough memory for video mode\n");
	}

	D_InitCaches (vid_surfcache, tcachesize);
}


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)
{
	//Uint8 video_bpp;
	//Uint16 video_w, video_h;
	Uint32 flags;

	vid_fullscreen = Cvar_Get ("vid_fullscreen", "0", CVAR_ROM, "Toggles fullscreen game mode");

	// 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_GetWindowSize (BASEWIDTH, BASEHEIGHT);
	vid.maxwarpwidth = WARP_WIDTH;
	vid.maxwarpheight = WARP_HEIGHT;

	// Set video width, height and flags
	flags = (SDL_SWSURFACE|SDL_HWPALETTE);
	if ( vid_fullscreen->int_val )
		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("");

	// 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
	VID_InitBuffers (vid.width, vid.height);

	// 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->int_val)
		{
		   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)
{
	JOY_Command ();

	if (old_windowed_mouse != _windowed_mouse->int_val) {
		old_windowed_mouse = _windowed_mouse->int_val;

		if (_windowed_mouse->int_val) {	// grab the pointer
			SDL_ShowCursor (0);
			SDL_WM_GrabInput (SDL_GRAB_ON);
		} else {	// ungrab the pointer
			SDL_WM_GrabInput (SDL_GRAB_OFF);
			SDL_ShowCursor (1);
		}
	}
}

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

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

	mouse_x = mouse_y = 0.0;
	mouse_avail = 1;
}

void
IN_Shutdown (void)
{
	JOY_Shutdown ();

	Con_Printf ("IN_Shutdown\n");
	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)
{
	JOY_Move (cmd);
	
	if (!mouse_avail)
		return;

	mouse_x *= sensitivity->value;
	mouse_y *= sensitivity->value;

	if ( (in_strafe.state & 1) || (lookstrafe->int_val && freelook))
		cmd->sidemove += m_side->value * mouse_x;
	else
		cl.viewangles[YAW] -= m_yaw->value * mouse_x;

	if (freelook)
		V_StopPitchDrift ();

	if (freelook && !(in_strafe.state & 1)) {
		cl.viewangles[PITCH] += m_pitch->value * mouse_y;
		cl.viewangles[PITCH] = bound (-70, cl.viewangles[PITCH], 80);
	} 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 (void)
{
	// It may not look like it, but this is important
}

void	
VID_LockBuffer (void)
{	   
}	   

void
VID_UnlockBuffer (void)
{	   
}	   

void
VID_SetCaption (char *text)
{
	if (text && *text) {
		char *temp = strdup (text);
		SDL_WM_SetCaption (va ("%s %s: %s", PROGRAM, VERSION, temp), NULL);
		free (temp);
	} else {
		SDL_WM_SetCaption (va ("%s %s", PROGRAM, VERSION), NULL);
	}
}