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diff --git a/src/gfx.c b/src/gfx.c
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+/*
+
+ ezx81 - X11 ZX81 emulator
+
+ Copyright (C) 2003 Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+ 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
+
+ -------------------------------------------------------------------------
+
+ Config file
+
+*/
+static const char ident[]="$Id$";
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "gfx.h"
+#include "exit.h"
+#include "config.h"
+
+#include "font.h"
+
+static const char ident_h[]=EZX81_GFX_H;
+static const char ident_fh[]=EZX81_FONT_H;
+
+
+/* ---------------------------------------- MACROS
+*/
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define SCR_W 320
+#define SCR_H 200
+
+#define LOCK do \
+ { \
+ if (SDL_MUSTLOCK(surface)) \
+ if (SDL_LockSurface(surface)<0) \
+ Exit("Failed to lock surface: %s\n", \
+ SDL_GetError()); \
+ } while(0)
+
+#define UNLOCK do \
+ { \
+ if (SDL_MUSTLOCK(surface)) \
+ SDL_UnlockSurface(surface); \
+ } while(0)
+
+
+/* ---------------------------------------- STATICS
+*/
+static SDL_Surface *surface;
+static Uint32 ticks;
+static Uint32 frame;
+static int scale;
+
+
+/* ---------------------------------------- PRIVATE FUNCTIONS
+*/
+
+/* Taken from SDL documentation
+*/
+static void putpixel(int x, int y, Uint32 pixel)
+{
+ int bpp;
+ Uint8 *p;
+
+ bpp=surface->format->BytesPerPixel;
+ p=(Uint8 *)surface->pixels+y*surface->pitch+x*bpp;
+
+ switch(bpp)
+ {
+ case 1:
+ *p=pixel;
+ break;
+
+ case 2:
+ *(Uint16 *)p=pixel;
+ break;
+
+ case 3:
+ if(SDL_BYTEORDER==SDL_BIG_ENDIAN)
+ {
+ p[0]=(pixel>>16)&0xff;
+ p[1]=(pixel>>8)&0xff;
+ p[2]=pixel&0xff;
+ } else
+ {
+ p[0]=pixel&0xff;
+ p[1]=(pixel>>8)&0xff;
+ p[2]=(pixel>>16)&0xff;
+ }
+ break;
+
+ case 4:
+ *(Uint32 *)p=pixel;
+ break;
+ }
+}
+
+
+static void DoHLine(int x1, int x2, int y, Uint32 col)
+{
+ for(;x1<=x2;x1++)
+ putpixel(x1,y,col);
+}
+
+
+static void DoVLine(int x, int y1, int y2, Uint32 col)
+{
+ for(;y1<=y2;y1++)
+ putpixel(x,y1,col);
+}
+
+
+/* ---------------------------------------- EXPORTED INTERFACES
+*/
+void GFXInit(void)
+{
+ scale=IConfig(CONF_SCALE);
+
+ if (scale<0)
+ scale=1;
+
+ frame=1000/IConfig(CONF_FRAMES_PER_SEC);
+
+ if (SDL_Init(SDL_INIT_TIMER|SDL_INIT_VIDEO))
+ Exit("Failed to init SDL: %s\n",SDL_GetError());
+
+ if (!(surface=SDL_SetVideoMode
+ (SCR_W,SCR_H,0,IConfig(CONF_FULLSCREEN) ? SDL_FULLSCREEN : 0)))
+ Exit("Failed to open video: %s\n",SDL_GetError());
+
+ SDL_ShowCursor(SDL_DISABLE);
+ SDL_WM_SetCaption("eZX81","eZX81");
+}
+
+
+SDL_Surface *GFXGetSurface(void)
+{
+ return surface;
+}
+
+
+Uint32 GFXRGB(Uint8 r, Uint8 g, Uint8 b)
+{
+ return SDL_MapRGB(surface->format,r,g,b);
+}
+
+
+void GFXClear(Uint32 col)
+{
+ SDL_FillRect(surface,NULL,col);
+}
+
+
+void GFXStartFrame(void)
+{
+ ticks=SDL_GetTicks();
+}
+
+
+void GFXEndFrame(int delay)
+{
+ SDL_UpdateRect(surface,0,0,0,0);
+
+ if (delay)
+ {
+ Uint32 diff;
+
+ diff=SDL_GetTicks()-ticks;
+
+ if (diff<frame)
+ SDL_Delay(frame-diff);
+ }
+}
+
+
+void GFXPlot(int x, int y, Uint32 col)
+{
+ LOCK;
+
+ putpixel(x,y,col);
+
+ UNLOCK;
+}
+
+
+void GFXRect(int x, int y, int w, int h, Uint32 col, int solid)
+{
+ LOCK;
+
+ if (solid)
+ {
+ SDL_Rect r;
+
+ r.x=x;
+ r.y=y;
+ r.w=w;
+ r.h=h;
+
+ SDL_FillRect(surface,&r,col);
+ }
+ else
+ {
+ DoHLine(x,x+w,y,col);
+ DoHLine(x,x+w,y+h,col);
+ DoVLine(x,y,y+h,col);
+ DoVLine(x+w,y,y+h,col);
+ }
+
+ UNLOCK;
+}
+
+
+void GFXHLine(int x1, int x2, int y, Uint32 col)
+{
+ LOCK;
+ DoHLine(x1,x2,y,col);
+ UNLOCK;
+}
+
+
+void GFXVLine(int x, int y1, int y2, Uint32 col)
+{
+ LOCK;
+ DoVLine(x,y1,y2,col);
+ UNLOCK;
+}
+
+
+void GFXPrint(int x, int y, Uint32 col, const char *format, ...)
+{
+ char buff[257];
+ va_list va;
+ char *p;
+ int sx,sy;
+
+ va_start(va,format);
+ vsprintf(buff,format,va);
+ va_end(va);
+
+ p=buff;
+
+ LOCK;
+
+ while(*p)
+ {
+ for(sy=0;sy<8;sy++)
+ {
+ if (y+sy<SCR_H && x<SCR_W)
+ {
+ for(sx=0;sx<8;sx++)
+ {
+ if (font[(int)*p][sx+sy*8] && x+sx<SCR_W)
+ putpixel(x+sx,y+sy,col);
+ }
+ }
+ }
+
+ p++;
+ x+=8;
+ }
+
+ UNLOCK;
+}
+
+
+/* END OF FILE */