Add Falcon Centscreen extension support

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401062

README.MiNT

@@ -156,7 +156,8 @@ Xbios video:
 		320x480x8 and 320x240x8 (software double-lined mode).
 	Falcon:
 		All modes supported by the current monitor (RVB or VGA).
-		BlowUp extended modes, ScreenBlaster 3 current mode.
+		BlowUp extended modes, ScreenBlaster 3 current mode, Centscreen current
+		mode.
 	Clones and any machine with monochrome monitor:
 		Not supported.
 

src/video/xbios/Makefile.am

@@ -10,5 +10,7 @@ XBIOS_SRCS = 	\
 	SDL_xbios.h	\
 	SDL_xbios_blowup.c	\
 	SDL_xbios_blowup.h	\
+	SDL_xbios_centscreen.c	\
+	SDL_xbios_centscreen.h	\
 	SDL_xbios_sb3.c	\
 	SDL_xbios_sb3.h

src/video/xbios/SDL_xbios.c

@@ -56,6 +56,7 @@ static char rcsid =
 #include "SDL_atarigl_c.h"
 #include "SDL_xbios.h"
 #include "SDL_xbios_blowup.h"
+#include "SDL_xbios_centscreen.h"
 #include "SDL_xbios_sb3.h"
 
 #define XBIOS_VID_DRIVER_NAME "xbios"
@@ -261,7 +262,7 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
 {
 	int i,j8,j16;
 	xbiosmode_t *current_mode;
-	unsigned long cookie_blow, cookie_scpn;
+	unsigned long cookie_blow, cookie_scpn, cookie_cnts;
 
 	/* Initialize all variables that we clean on shutdown */
 	memset (SDL_modelist, 0, sizeof(SDL_modelist));
@@ -415,8 +416,9 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
 				SDL_XBIOS_BlowupInit(this, (blow_cookie_t *)cookie_blow);
 			} else if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
 				SDL_XBIOS_SB3Init(this, (scpn_cookie_t *)cookie_scpn);
+			} else if (Getcookie(C_CNTS, &cookie_cnts) == C_FOUND) {
+				SDL_XBIOS_CentscreenInit(this);
 			}
-
 			break;
 	}
 

src/video/xbios/SDL_xbios_centscreen.c

@@ -0,0 +1,53 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2004 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+/*
+	Centscreen extension definitions
+
+	Patrice Mandin
+*/
+
+#include <stdlib.h>
+
+#include <mint/falcon.h>
+
+#include "SDL_xbios.h"
+#include "SDL_xbios_centscreen.h"
+
+void SDL_XBIOS_CentscreenInit(_THIS)
+{
+	centscreen_mode_t	curmode;
+
+	/* Reset current mode list */
+	if (XBIOS_modelist) {
+		free(XBIOS_modelist);
+		XBIOS_nummodes = 0;
+		XBIOS_modelist = NULL;
+	}
+
+	/* Add current active mode */
+	Vread(&curmode);
+
+	SDL_XBIOS_AddMode(this, -1, curmode.physx, curmode.physy, curmode.plan,
+		SDL_FALSE
+	);
+}

src/video/xbios/SDL_xbios_centscreen.h

@@ -0,0 +1,115 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2004 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+/*
+	Centscreen extension definitions
+
+	Patrice Mandin
+*/
+
+#ifndef _SDL_xbios_centscreen_h
+#define _SDL_xbios_centscreen_h
+
+#include <mint/falcon.h>	/* for trap_14_xxx macros */
+
+#include "SDL_xbios.h"
+
+/*--- Defines ---*/
+
+#ifndef C_CNTS
+#define C_CNTS 0x434e5453L
+#endif
+
+#define CSCREEN_ENERGYSTAR		(1<<9)
+#define CSCREEN_SAVER			(1<<10)
+#define CSCREEN_VIRTUAL			(1<<11)
+#define CSCREEN_EXTCLOCK_CT2	(1<<12)
+#define CSCREEN_EXTCLOCK		(1<<13)
+#define CSCREEN_STANDARD		(1<<14)
+#define CSCREEN_DEFAULT			(1<<15)
+
+/*--- Structures ---*/
+
+typedef struct {
+	unsigned short	handle;	/* videomode handle */
+	unsigned short	mode;	/* Falcon videomode code */
+	unsigned short	physx;	/* visible width */
+	unsigned short	physy;	/* visible height */
+	unsigned short	plan;	/* bitplanes */
+	unsigned short	logx;	/* virtual width */
+	unsigned short	logy;	/* virtual height */
+	unsigned short	eco;	/* screen saver delay */
+	unsigned short	eco2;	/* energy star screen saver delay */
+	unsigned short	wsize;	/* screen width (mm) */
+	unsigned short	hsize;	/* screen height (mm) */
+	unsigned short	dummy[21];
+	unsigned char	name[32];	/* videomode name */
+} __attribute__((packed)) centscreen_mode_t;
+
+/*--- Functions prototypes ---*/
+
+#define Vread(current_mode)	\
+	(void)trap_14_wl((short)0x41,(long)(current_mode))
+#define Vwrite(init_vdi, inparam, outparam)	\
+	(long)trap_14_wwll((short)0x42,(short)(init_vdi),(long)(inparam),(long)(outparam))
+#define Vattrib(inparam, outparam)	\
+	(void)trap_14_wll((short)0x43,(long)(inparam),(long)(outparam))
+#define Vcreate(inparam, outparam)	\
+	(void)trap_14_wll((short)0x44,(long)(inparam),(long)(outparam))
+#define Vdelete(handle)	\
+	(long)trap_14_ww((short)0x45,(short)(handle))
+#define Vfirst(mask,mode)	\
+	(long)trap_14_wll((short)0x46,(long)(mask),(long)(mode))
+#define Vnext(mask,mode)	\
+	(long)trap_14_wll((short)0x47,(long)(mask),(long)(mode))
+#define Vvalid(handle)	\
+	(long)trap_14_ww((short)0x48,(short)(handle))
+#define Vload()	\
+	(long)trap_14_w((short)0x49)
+#define Vsave()	\
+	(long)trap_14_w((short)0x4a)
+#define Vopen()	\
+	(long)trap_14_w((short)0x4b)
+#define Vclose()	\
+	(long)trap_14_w((short)0x4c)
+#define Vscroll(scrollmode)	\
+	(long)trap_14_ww((short)0x4d,(short)(scrollmode))
+#define Voffset()	\
+	(long)trap_14_w((short)0x4e)
+#define Vseek()	\
+	(long)trap_14_w((short)0x4f)
+#define Vlock(cmd)	\
+	(long)trap_14_ww((short)0x50,(short)(cmd))
+#define SetMon(montype)	\
+	(long)trap_14_ww((short)0x51,(short)(montype))
+#define MultiMon(cmd)	\
+	(long)trap_14_ww((short)0x52,(short)(cmd))
+#define VSizeComp()	\
+	(long)trap_14_w((short)0x53)
+#define Vsize(mode)	\
+	(long)trap_14_wl((short)0x54,(long)(mode))
+
+/*--- Functions prototypes ---*/
+
+void SDL_XBIOS_CentscreenInit(_THIS);
+
+#endif /* _SDL_xbios_centscreen_h */