Quake!

This ports id Software's Quake to run on the SDL plugin runtime. The
source code originated from id under the GPLv2 license. I used
https://github.com/ahefner/sdlquake as the base of my port.

Performance is, unsurprisingly, not on par with what you're probably
used to on PC. I average about 10FPS on ipod6g, but it's still
playable.

Sound works well enough, but in-game music is not supported. I've
written ARM assembly routines for the inner sound loop. Make sure you
turn the "brightness" all the way down, or colors will look funky.

To run, extract Quake's data files to /.rockbox/quake. Have fun!

Change-Id: I4285036e967d7f0722802d43cf2096c808ca5799

1 files changed, 224 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/quake/cvar.c b/apps/plugins/sdl/progs/quake/cvar.c
new file mode 100644
index 0000000000..07a761a332
--- /dev/null
+++ b/apps/plugins/sdl/progs/quake/cvar.c
@@ -0,0 +1,224 @@
+/*
+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 the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+// cvar.c -- dynamic variable tracking
+
+#include "quakedef.h"
+
+cvar_t  *cvar_vars;
+char    *cvar_null_string = "";
+
+/*
+============
+Cvar_FindVar
+============
+*/
+cvar_t *Cvar_FindVar (char *var_name)
+{
+        cvar_t  *var;
+        
+        for (var=cvar_vars ; var ; var=var->next)
+                if (!Q_strcmp (var_name, var->name))
+                        return var;
+
+        return NULL;
+}
+
+/*
+============
+Cvar_VariableValue
+============
+*/
+float   Cvar_VariableValue (char *var_name)
+{
+        cvar_t  *var;
+        
+        var = Cvar_FindVar (var_name);
+        if (!var)
+                return 0;
+        return Q_atof (var->string);
+}
+
+
+/*
+============
+Cvar_VariableString
+============
+*/
+char *Cvar_VariableString (char *var_name)
+{
+        cvar_t *var;
+        
+        var = Cvar_FindVar (var_name);
+        if (!var)
+                return cvar_null_string;
+        return var->string;
+}
+
+
+/*
+============
+Cvar_CompleteVariable
+============
+*/
+char *Cvar_CompleteVariable (char *partial)
+{
+        cvar_t          *cvar;
+        int                     len;
+        
+        len = Q_strlen(partial);
+        
+        if (!len)
+                return NULL;
+                
+// check functions
+        for (cvar=cvar_vars ; cvar ; cvar=cvar->next)
+                if (!Q_strncmp (partial,cvar->name, len))
+                        return cvar->name;
+
+        return NULL;
+}
+
+
+/*
+============
+Cvar_Set
+============
+*/
+void Cvar_Set (char *var_name, char *value)
+{
+        cvar_t  *var;
+        qboolean changed;
+        
+        var = Cvar_FindVar (var_name);
+        if (!var)
+        {       // there is an error in C code if this happens
+                Con_Printf ("Cvar_Set: variable %s not found\n", var_name);
+                return;
+        }
+
+        changed = Q_strcmp(var->string, value);
+        
+        Z_Free (var->string);   // free the old value string
+        
+        var->string = Z_Malloc (Q_strlen(value)+1);
+        Q_strcpy (var->string, value);
+        var->value = Q_atof (var->string);
+        if (var->server && changed)
+        {
+                if (sv.active)
+                        SV_BroadcastPrintf ("\"%s\" changed to \"%s\"\n", var->name, var->string);
+        }
+}
+
+/*
+============
+Cvar_SetValue
+============
+*/
+void Cvar_SetValue (char *var_name, float value)
+{
+        char    val[32];
+        
+        sprintf (val, "%f",value);
+        Cvar_Set (var_name, val);
+}
+
+
+/*
+============
+Cvar_RegisterVariable
+
+Adds a freestanding variable to the variable list.
+============
+*/
+void Cvar_RegisterVariable (cvar_t *variable)
+{
+        char    *oldstr;
+        
+// first check to see if it has allready been defined
+        if (Cvar_FindVar (variable->name))
+        {
+                Con_Printf ("Can't register variable %s, allready defined\n", variable->name);
+                return;
+        }
+        
+// check for overlap with a command
+        if (Cmd_Exists (variable->name))
+        {
+                Con_Printf ("Cvar_RegisterVariable: %s is a command\n", variable->name);
+                return;
+        }
+                
+// copy the value off, because future sets will Z_Free it
+        oldstr = variable->string;
+        variable->string = Z_Malloc (Q_strlen(variable->string)+1);     
+        Q_strcpy (variable->string, oldstr);
+        variable->value = Q_atof (variable->string);
+        
+// link the variable in
+        variable->next = cvar_vars;
+        cvar_vars = variable;
+}
+
+/*
+============
+Cvar_Command
+
+Handles variable inspection and changing from the console
+============
+*/
+qboolean        Cvar_Command (void)
+{
+        cvar_t                  *v;
+
+// check variables
+        v = Cvar_FindVar (Cmd_Argv(0));
+        if (!v)
+                return false;
+                
+// perform a variable print or set
+        if (Cmd_Argc() == 1)
+        {
+                Con_Printf ("\"%s\" is \"%s\"\n", v->name, v->string);
+                return true;
+        }
+
+        Cvar_Set (v->name, Cmd_Argv(1));
+        return true;
+}
+
+
+/*
+============
+Cvar_WriteVariables
+
+Writes lines containing "set variable value" for all variables
+with the archive flag set to true.
+============
+*/
+void Cvar_WriteVariables (FILE *f)
+{
+        cvar_t  *var;
+        
+        for (var = cvar_vars ; var ; var = var->next)
+                if (var->archive)
+                        fprintf (f, "%s \"%s\"\n", var->name, var->string);
+}
+