gl_vidlinuxglx.c

来自「quake1 dos源代码最新版本」· C语言 代码 · 共 1,025 行 · 第 1/2 页

	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*10000; v<256; v++,pal+=4) {
			r1 = (int)r - (int)pal[0];
			g1 = (int)g - (int)pal[1];
			b1 = (int)b - (int)pal[2];
			dist = (r1*r1)+(g1*g1)+(b1*b1);
			if (dist < bestdist) {
				k=v;
				bestdist = dist;
			}
		}
		d_15to8table[i]=k;
	}
}

void CheckMultiTextureExtensions(void)
{
	void *prjobj;

	if (strstr(gl_extensions, "GL_SGIS_multitexture ") && !COM_CheckParm("-nomtex")) {
		Con_Printf("Found GL_SGIS_multitexture...\n");

		if ((prjobj = dlopen(NULL, RTLD_LAZY)) == NULL) {
			Con_Printf("Unable to open symbol list for main program.\n");
			return;
		}

		qglMTexCoord2fSGIS = (void *) dlsym(prjobj, "glMTexCoord2fSGIS");
		qglSelectTextureSGIS = (void *) dlsym(prjobj, "glSelectTextureSGIS");

		if (qglMTexCoord2fSGIS && qglSelectTextureSGIS) {
			Con_Printf("Multitexture extensions found.\n");
			gl_mtexable = true;
		} else
			Con_Printf("Symbol not found, disabled.\n");

		dlclose(prjobj);
	}
}

/*
===============
GL_Init
===============
*/
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);

	CheckMultiTextureExtensions ();

	glClearColor (1,0,0,0);
	glCullFace(GL_FRONT);
	glEnable(GL_TEXTURE_2D);

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

	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	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)
{
	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();
	glXSwapBuffers(dpy, win);
}

qboolean VID_Is8bit(void)
{
	return is8bit;
}

void VID_Init8bitPalette(void)
{
	// Check for 8bit Extensions and initialize them.
	int i;
	void *prjobj;

	if ((prjobj = dlopen(NULL, RTLD_LAZY)) == NULL) {
		Con_Printf("Unable to open symbol list for main program.\n");
		return;
	}

	if (strstr(gl_extensions, "3DFX_set_global_palette") &&
		(qgl3DfxSetPaletteEXT = dlsym(prjobj, "gl3DfxSetPaletteEXT")) != NULL) {
		GLubyte table[256][4];
		char *oldpal;

		Con_SafePrintf("8-bit GL extensions enabled.\n");
		glEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
		oldpal = (char *) d_8to24table; //d_8to24table3dfx;
		for (i=0;i<256;i++) {
			table[i][2] = *oldpal++;
			table[i][1] = *oldpal++;
			table[i][0] = *oldpal++;
			table[i][3] = 255;
			oldpal++;
		}
		qgl3DfxSetPaletteEXT((GLuint *)table);
		is8bit = true;

	} else if (strstr(gl_extensions, "GL_EXT_shared_texture_palette") &&
		(qglColorTableEXT = dlsym(prjobj, "glColorTableEXT")) != NULL) {
		char thePalette[256*3];
		char *oldPalette, *newPalette;

		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++;
		}
		qglColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (void *) thePalette);
		is8bit = true;
	}

	dlclose(prjobj);
}

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 = 0.7; // default to 0.7 on non-3dfx hardware
	} 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));
}

// 2001-09-18 New cvar system by Maddes (Init)  start
/*
===================
IN_Init_Cvars
===================
*/
void IN_Init_Cvars (void)
{
	m_filter = Cvar_Get ("m_filter", "0", CVAR_ORIGINAL);
}

/*
===================
VID_Init_Cvars
===================
*/
void VID_Init_Cvars (void)
{
	vid_mode = Cvar_Get ("vid_mode", "0", CVAR_ORIGINAL);
	in_mouse = Cvar_Get ("in_mouse", "1", CVAR_ORIGINAL);
	in_dgamouse = Cvar_Get ("in_dgamouse", "1", CVAR_ORIGINAL);
	gl_ztrick = Cvar_Get ("gl_ztrick", "1", CVAR_ORIGINAL);
}
// 2001-09-18 New cvar system by Maddes (Init)  end

void VID_Init(unsigned char *palette)
{
	int i;
	int attrib[] = {
		GLX_RGBA,
		GLX_RED_SIZE, 1,
		GLX_GREEN_SIZE, 1,
		GLX_BLUE_SIZE, 1,
		GLX_DOUBLEBUFFER,
		GLX_DEPTH_SIZE, 1,
		None
	};
	char	gldir[MAX_OSPATH];
	int width = 640, height = 480;
	XSetWindowAttributes attr;
	unsigned long mask;
	Window root;
	XVisualInfo *visinfo;
	qboolean fullscreen = true;
	int MajorVersion, MinorVersion;
	int actualWidth, actualHeight;

// 2001-09-18 New cvar system by Maddes (Init)  start
/*
	vid_mode = Cvar_Get ("vid_mode", "0", CVAR_ORIGINAL);
	in_mouse = Cvar_Get ("in_mouse", "1", CVAR_ORIGINAL);
	in_dgamouse = Cvar_Get ("in_dgamouse", "1", CVAR_ORIGINAL);
	m_filter = Cvar_Get ("m_filter", "0", CVAR_ORIGINAL);
	gl_ztrick = Cvar_Get ("gl_ztrick", "1", CVAR_ORIGINAL);
*/
// 2001-09-18 New cvar system by Maddes (Init)  end

	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("-window")) != 0)
		fullscreen = false;

	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 = Q_atoi(com_argv[i+1]);
	else
		vid.conwidth = 640;

	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;

	if ((i = COM_CheckParm("-conheight")) != 0)
		vid.conheight = Q_atoi(com_argv[i+1]);
	if (vid.conheight < 200)
		vid.conheight = 200;

	if (!(dpy = XOpenDisplay(NULL))) {
		fprintf(stderr, "Error couldn't open the X display\n");
		exit(1);
	}

	scrnum = DefaultScreen(dpy);
	root = RootWindow(dpy, scrnum);

	// Get video mode list
	MajorVersion = MinorVersion = 0;
	if (!XF86VidModeQueryVersion(dpy, &MajorVersion, &MinorVersion)) {
		vidmode_ext = false;
	} else {
		Con_Printf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
		vidmode_ext = true;
	}

	visinfo = glXChooseVisual(dpy, scrnum, attrib);
	if (!visinfo) {
		fprintf(stderr, "qkHack: Error couldn't get an RGB, Double-buffered, Depth visual\n");
		exit(1);
	}

	if (vidmode_ext) {
		int best_fit, best_dist, dist, x, y;

		XF86VidModeGetAllModeLines(dpy, scrnum, &num_vidmodes, &vidmodes);

		// Are we going fullscreen?  If so, let's change video mode
		if (fullscreen) {
			best_dist = 9999999;
			best_fit = -1;

			for (i = 0; i < num_vidmodes; i++) {
				if (width > vidmodes[i]->hdisplay ||
					height > vidmodes[i]->vdisplay)
					continue;

				x = width - vidmodes[i]->hdisplay;
				y = height - vidmodes[i]->vdisplay;
				dist = (x * x) + (y * y);
				if (dist < best_dist) {
					best_dist = dist;
					best_fit = i;
				}
			}

			if (best_fit != -1) {
				actualWidth = vidmodes[best_fit]->hdisplay;
				actualHeight = vidmodes[best_fit]->vdisplay;

				// change to the mode
				XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[best_fit]);
				vidmode_active = true;

				// Move the viewport to top left
				XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
			} else
				fullscreen = 0;
		}
	}

	/* window attributes */
	attr.background_pixel = 0;
	attr.border_pixel = 0;
	attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
	attr.event_mask = X_MASK;
	if (vidmode_active) {
		mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore |
			CWEventMask | CWOverrideRedirect;
		attr.override_redirect = True;
		attr.backing_store = NotUseful;
		attr.save_under = False;
	} else
		mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;

	win = XCreateWindow(dpy, root, 0, 0, width, height,
						0, visinfo->depth, InputOutput,
						visinfo->visual, mask, &attr);
	XMapWindow(dpy, win);

	if (vidmode_active) {
		XMoveWindow(dpy, win, 0, 0);
		XRaiseWindow(dpy, win);
		XWarpPointer(dpy, None, win, 0, 0, 0, 0, 0, 0);
		XFlush(dpy);
		// Move the viewport to top left
		XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
	}

	XFlush(dpy);

	ctx = glXCreateContext(dpy, visinfo, NULL, True);

	glXMakeCurrent(dpy, win, ctx);

	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;

	InitSig(); // trap evil signals

	GL_Init();

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

	VID_SetPalette(palette);

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

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

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

void Sys_SendKeyEvents(void)
{
	HandleEvents();
}

void Force_CenterView_f (void)
{
	cl.viewangles[PITCH] = 0;
}

void IN_Init(void)
{
}

void IN_Shutdown(void)
{
}

/*
===========
IN_Commands
===========
*/
void IN_Commands (void)
{
	if (!dpy || !win)
		return;

	if (vidmode_active || key_dest == key_game)
		IN_ActivateMouse();
	else
		IN_DeactivateMouse ();
}

/*
===========
IN_Move
===========
*/
void IN_MouseMove (usercmd_t *cmd)
{
	if (!mouse_avail)
		return;

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

	mx *= sensitivity->value;
	my *= sensitivity->value;

// add mouse X/Y movement to cmd
	if ( (in_strafe.state & 1) || (lookstrafe->value && ((in_mlook.state & 1) ^ ((int)m_look->value & 1)) ))	// 2001-12-16 M_LOOK cvar by Heffo/Maddes
		cmd->sidemove += m_side->value * mx;
	else
		cl.viewangles[YAW] -= m_yaw->value * mx;

	if ((in_mlook.state & 1) ^ ((int)m_look->value & 1))	// 2001-12-16 M_LOOK cvar by Heffo/Maddes
		V_StopPitchDrift ();

	if ( ((in_mlook.state & 1) ^ ((int)m_look->value & 1)) && !(in_strafe.state & 1))	// 2001-12-16 M_LOOK cvar by Heffo/Maddes
	{
		cl.viewangles[PITCH] += m_pitch->value * my;
		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 * my;
		else
			cmd->forwardmove -= m_forward->value * my;
	}
	mx = my = 0;
}

void IN_Move (usercmd_t *cmd)
{
	IN_MouseMove(cmd);
}