newtree/source/vid_sgl.c

/*
	vid_sgl.c

	Video driver for OpenGL-using versions of SDL

	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 <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <signal.h>
#include <values.h>

#include <SDL/SDL.h>

#include "qtypes.h"
#include "quakedef.h"
#include "qendian.h"
#include "glquake.h"
#include "cvar.h"
#include "qargs.h"
#include "console.h"
#include "keys.h"
#include "menu.h"
#include "sys.h"
#include "draw.h"

#define	WARP_WIDTH	320
#define	WARP_HEIGHT	200

static qboolean		vid_initialized = false;

cvar_t  *vid_mode;
cvar_t  *vid_fullscreen;
extern cvar_t   *gl_triplebuffer;
extern cvar_t   *in_dga_mouseaccel;
cvar_t          *_windowed_mouse;
cvar_t          *m_filter;

unsigned short	d_8to16table[256];
unsigned	d_8to24table[256];
unsigned char   d_15to8table[65536];

int scr_width, scr_height;
int VID_options_items = 1;

int	     texture_mode = GL_LINEAR;

int	     texture_extension_number = 1;

float	   gldepthmin, gldepthmax;

cvar_t  *gl_ztrick;

const char *gl_vendor;
const char *gl_renderer;
const char *gl_version;
const char *gl_extensions;

qboolean is8bit = false;
qboolean gl_mtexable = false;
int gl_mtex_enum = TEXTURE0_SGIS;

int modestate;

static qboolean mouse_avail;
static float    mouse_x, mouse_y;
static float    old_mouse_x, old_mouse_y;
static float    old__windowed_mouse;

void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
}

void D_EndDirectRect (int x, int y, int width, int height)
{
}

void	VID_Shutdown (void)
{
	if (!vid_initialized)
		return;

	Con_Printf("VID_Shutdown\n");

	SDL_Quit();
}
#ifndef WIN32
static void
signal_handler(int sig)
{
	printf("Received signal %d, exiting...\n", sig);
	Sys_Quit();
	exit(sig);
}

static void
InitSig(void)
{
	signal(SIGHUP, signal_handler);
	signal(SIGINT, signal_handler);
	signal(SIGQUIT, signal_handler);
	signal(SIGILL, signal_handler);
	signal(SIGTRAP, signal_handler);
	signal(SIGIOT, signal_handler);
	signal(SIGBUS, signal_handler);
/*      signal(SIGFPE, signal_handler); */
	signal(SIGSEGV, signal_handler);
	signal(SIGTERM, signal_handler);
}
#endif
void	VID_SetPalette (unsigned char *palette)
{
        byte    *pal;
        unsigned r,g,b;
        unsigned v;
        int     r1,g1,b1;
        int             k;
        unsigned short i;
        unsigned        *table;
        FILE *f;
        char s[255];
        float dist, bestdist;
        static qboolean palflag = false;

//
// 8 8 8 encoding
//
//      Con_Printf("Converting 8to24\n");

        pal = palette;
        table = d_8to24table;
        for (i=0 ; i<256 ; i++)
        {
                r = pal[0];
                g = pal[1];
                b = pal[2];
                pal += 3;

//              v = (255<<24) + (r<<16) + (g<<8) + (b<<0);
//              v = (255<<0) + (r<<8) + (g<<16) + (b<<24);
                v = (255<<24) + (r<<0) + (g<<8) + (b<<16);
                *table++ = v;
        }
        d_8to24table[255] &= 0xffffff;  // 255 is transparent

        // JACK: 3D distance calcs - k is last closest, l is the distance.
        // FIXME: Precalculate this and cache to disk.
        if (palflag)
                return;
        palflag = true;

        COM_FOpenFile("glquake/15to8.pal", &f);
        if (f) {
                fread(d_15to8table, 1<<15, 1, f);
                fclose(f);
        } else {
                for (i=0; i < (1<<15); i++) {
                        /* Maps
                        000000000000000
                        000000000011111 = Red  = 0x1F
                        000001111100000 = Blue = 0x03E0
                        111110000000000 = Grn  = 0x7C00
                        */
                        r = ((i & 0x1F) << 3)+4;
                        g = ((i & 0x03E0) >> 2)+4;
                        b = ((i & 0x7C00) >> 7)+4;
                        pal = (unsigned char *)d_8to24table;
                        for (v=0,k=0,bestdist=10000.0; v<256; v++,pal+=4) {
                                r1 = (int)r - (int)pal[0];
                                g1 = (int)g - (int)pal[1];
                                b1 = (int)b - (int)pal[2];
                                dist = sqrt(((r1*r1)+(g1*g1)+(b1*b1)));
                                if (dist < bestdist) {
                                        k=v;
                                        bestdist = dist;
                                }
                        }
                        d_15to8table[i]=k;
                }
                snprintf(s, sizeof(s), "%s/glquake", com_gamedir);
                Sys_mkdir (s);
                snprintf(s, sizeof(s), "%s/glquake/15to8.pal", com_gamedir);
                if ((f = fopen(s, "wb")) != NULL) {
                        fwrite(d_15to8table, 1<<15, 1, f);
                        fclose(f);
                }
        }
}

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

void GL_Init (void)
{
	gl_vendor = glGetString (GL_VENDOR);
	Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
	gl_renderer = glGetString (GL_RENDERER);
	Con_Printf ("GL_RENDERER: %s\n", gl_renderer);

	gl_version = glGetString (GL_VERSION);
	Con_Printf ("GL_VERSION: %s\n", gl_version);
	gl_extensions = glGetString (GL_EXTENSIONS);
	Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);

//	Con_Printf ("%s %s\n", gl_renderer, gl_version);

	glClearColor (0,0,0,0);
	glCullFace(GL_FRONT);
	glEnable(GL_TEXTURE_2D);

	glEnable(GL_ALPHA_TEST);
	glAlphaFunc(GL_GREATER, 0.666);

	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);

/* glShadeMode(GL_SMOOTH) should look better then GL_FLAT but
   I don't know if it looks any better, sure is slower
	glShadeModel (GL_SMOOTH);
*/
	glShadeModel (GL_FLAT);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

//	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}

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

=================
*/
void GL_BeginRendering (int *x, int *y, int *width, int *height)
{
	*x = *y = 0;
	*width = scr_width;
	*height = scr_height;
}

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

qboolean VID_Is8bit(void)
{
	return is8bit;
}

#ifdef GL_EXT_SHARED
void VID_Init8bitPalette()
{
	// Check for 8bit Extensions and initialize them.
	int i;
	char thePalette[256*3];
	char *oldPalette, *newPalette;

	if (strstr(gl_extensions, "GL_EXT_shared_texture_palette") == NULL)
		return;

	Con_SafePrintf("8-bit GL extensions enabled.\n");
	glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
	oldPalette = (char *) d_8to24table; //d_8to24table3dfx;
	newPalette = thePalette;
	for (i=0;i<256;i++) {
		*newPalette++ = *oldPalette++;
		*newPalette++ = *oldPalette++;
		*newPalette++ = *oldPalette++;
		oldPalette++;
	}
	glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
	is8bit = true;
}

#else

void VID_Init8bitPalette(void)
{
}

#endif

void	VID_Init (unsigned char *palette)
{
	Uint32 flags = SDL_OPENGL;
	int i;
	char gldir[MAX_OSPATH];
	int width = 640, height = 480;

	vid_mode = Cvar_Get ("vid_mode","0",0,"None");
	gl_ztrick = Cvar_Get ("gl_ztrick","0",CVAR_ARCHIVE,"None");
	vid_fullscreen = Cvar_Get ("vid_fullscreen","0",0,"None");

	vid.maxwarpwidth = WARP_WIDTH;
	vid.maxwarpheight = WARP_HEIGHT;
	vid.colormap = host_colormap;
	vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));

	// Interpret command-line params

	// Set vid parameters
	if ((i = COM_CheckParm("-width")) != 0)
		width = atoi(com_argv[i+1]);
	if ((i = COM_CheckParm("-height")) != 0)
		height = atoi(com_argv[i+1]);

	if ((i = COM_CheckParm("-conwidth")) != 0)
		vid.conwidth = atoi(com_argv[i+1]);
	else
		vid.conwidth = width;

	vid.conwidth &= 0xfff8; // make it a multiple of eight
	if (vid.conwidth < 320)
		vid.conwidth = 320;

	// pick a conheight that matches with correct aspect
	vid.conheight = vid.conwidth * 3 / 4;

	i = COM_CheckParm ("-conheight");
	if ( i != 0 )   // Set console height, but no smaller than 200 px
		vid.conheight = atoi(com_argv[i+1]);
	if (vid.conheight < 200)
		vid.conheight = 200;

	// Initialize the SDL library 
	if (SDL_Init(SDL_INIT_VIDEO) < 0) 
	   Sys_Error("Couldn't initialize SDL: %s\n", SDL_GetError());

	// Check if we want fullscreen
	if(vid_fullscreen->value)
	{
		flags |= SDL_FULLSCREEN;
		// Don't annoy Mesa/3dfx folks
#ifndef WIN32
		setenv ("MESA_GLX_FX","fullscreen", 1);
	} else {
		setenv ("MESA_GLX_FX","disable",1);
#endif
	}

	// Setup GL Attributes
	SDL_GL_SetAttribute (SDL_GL_RED_SIZE,1);
	SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE,1);
	SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE,1);
	SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER,1);
	SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE,1);

	if (SDL_SetVideoMode(width, height, 8, flags) == NULL)
	{
	   Sys_Error("Couldn't set video mode: %s\n", SDL_GetError());
	   SDL_Quit ();
	}

	scr_width = width;
	scr_height = height;

	if (vid.conheight > height)
		vid.conheight = height;
	if (vid.conwidth > width)
		vid.conwidth = width;
	vid.width = vid.conwidth;
	vid.height = vid.conheight;

	vid.aspect = ((float)vid.height / (float)vid.width) * (320.0 / 240.0);
	vid.numpages = 2;
#ifndef WIN32
	InitSig(); // trap evil signals
#endif

	GL_Init();

	snprintf(gldir, sizeof(gldir), "%s/glquake", com_gamedir);
	Sys_mkdir (gldir);

	GL_CheckGamma (palette);
	VID_SetPalette (palette);

	// Check for 3DFX Extensions and initialize them.
	VID_Init8bitPalette();

	Con_SafePrintf ("Video mode %dx%d initialized.\n",
			width, height);

	vid_initialized = true;

	vid.recalc_refdef = 1;	  // force a surface cache flush
}

void VID_InitCvars()
{
	gl_triplebuffer = Cvar_Get("gl_triplebuffer","1",CVAR_ARCHIVE,"None");
}

/*
================
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*2;
                    mouse_y = event.motion.yrel*2;
                    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*2;
		   mouse_y = event.motion.yrel*2;
		}
                break;

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

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


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

    mouse_x = mouse_y = 0.0;
    mouse_avail = 1;
    SDL_WM_GrabInput (SDL_GRAB_ON);
    SDL_ShowCursor (0);
    // FIXME: disable DGA if in_dgamouse says to
}

void IN_Shutdown (void)
{
    mouse_avail = 0;
}

void
IN_Commands(void)
{
        if (old__windowed_mouse != _windowed_mouse->value) {
                old__windowed_mouse = _windowed_mouse->value;

                if (!_windowed_mouse->value) {
                        /* ungrab the pointer */
                        SDL_WM_GrabInput (SDL_GRAB_OFF);
                } else {
                        /* grab the pointer */
			SDL_WM_GrabInput (SDL_GRAB_ON);
                }
        }
}
void
IN_Move(usercmd_t *cmd)
{
        if (!mouse_avail)
                return;

        if (m_filter->value) {
                mouse_x = (mouse_x + old_mouse_x) * 0.5;
                mouse_y = (mouse_y + old_mouse_y) * 0.5;
        }

        old_mouse_x = mouse_x;
        old_mouse_y = mouse_y;

        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_LockBuffer ( void )
{      
}      

void
VID_UnlockBuffer ( void )
{      
} 

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