From d3c03e27f9a9089ca28ad6103c5eb6d56ffe4422 Mon Sep 17 00:00:00 2001
From: Patrice Mandin <patmandin@gmail.com>
Date: Sat, 19 Sep 2009 13:21:05 +0000
Subject: [PATCH] Start Milan video support

--HG--
branch : SDL-1.2
---
 src/video/xbios/SDL_xbios.c       |  11 ++-
 src/video/xbios/SDL_xbios.h       |   3 +-
 src/video/xbios/SDL_xbios_milan.c |  87 +++++++++++++++++++++
 src/video/xbios/SDL_xbios_milan.h | 125 ++++++++++++++++++++++++++++++
 4 files changed, 224 insertions(+), 2 deletions(-)
 create mode 100644 src/video/xbios/SDL_xbios_milan.c
 create mode 100644 src/video/xbios/SDL_xbios_milan.h

diff --git a/src/video/xbios/SDL_xbios.c b/src/video/xbios/SDL_xbios.c
index 4f1581e0f..f441f702c 100644
--- a/src/video/xbios/SDL_xbios.c
+++ b/src/video/xbios/SDL_xbios.c
@@ -50,6 +50,7 @@
 #include "SDL_xbios_centscreen.h"
 #include "SDL_xbios_sb3.h"
 #include "SDL_xbios_tveille.h"
+#include "SDL_xbios_milan.h"
 
 #define XBIOS_VID_DRIVER_NAME "xbios"
 
@@ -183,6 +184,8 @@ static int XBIOS_Available(void)
 				}
 			}
 			break;
+		case VDO_MILAN:
+			break;
 		default:
 			return 0;
 	}
@@ -488,6 +491,9 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
 				}
 			}
 			break;
+		case VDO_MILAN:
+			SDL_XBIOS_ListMilanModes(this, 0);
+			break;
 	}
 
 	for ( i=0; i<NUM_MODELISTS; ++i ) {
@@ -552,6 +558,9 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
 				}
 			}
 			break;
+		case VDO_MILAN:
+			SDL_XBIOS_ListMilanModes(this, 1);
+			break;
 	}
 
 	XBIOS_screens[0]=NULL;
@@ -694,7 +703,7 @@ static SDL_Surface *XBIOS_SetVideoMode(_THIS, SDL_Surface *current,
 		XBIOS_screens[1]=(void *) (( (long) XBIOS_screensmem[1]+256) & 0xFFFFFF00UL);
 		modeflags |= SDL_DOUBLEBUF;
 	}
-	
+
 	/* Allocate the new pixel format for the screen */
 	if ( ! SDL_ReallocFormat(current, new_depth, 0, 0, 0, 0) ) {
 		XBIOS_FreeBuffers(this);
diff --git a/src/video/xbios/SDL_xbios.h b/src/video/xbios/SDL_xbios.h
index c9a778e52..4713172e0 100644
--- a/src/video/xbios/SDL_xbios.h
+++ b/src/video/xbios/SDL_xbios.h
@@ -69,7 +69,8 @@ enum {
 	VDO_ST=0,
 	VDO_STE,
 	VDO_TT,
-	VDO_F30
+	VDO_F30,
+	VDO_MILAN
 };
 
 /* Monitor types */
diff --git a/src/video/xbios/SDL_xbios_milan.c b/src/video/xbios/SDL_xbios_milan.c
new file mode 100644
index 000000000..fe8c8e7af
--- /dev/null
+++ b/src/video/xbios/SDL_xbios_milan.c
@@ -0,0 +1,87 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2009 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
+*/
+#include "SDL_config.h"
+
+/*
+	Milan Xbios video functions
+
+	Patrice Mandin
+*/
+
+#include <mint/cookie.h>
+
+#include "SDL_xbios.h"
+#include "SDL_xbios_milan.h"
+
+#ifndef Validmode
+#define Validmode(mode)	\
+	(short)trap_14_ww((short)0x5f,(short)(mode))
+#endif
+
+#define NUM_PREDEFINED_MODES 7
+
+typedef struct {
+	Uint16 width, height;
+} predefined_mode_t;
+
+static const predefined_mode_t mode_list[NUM_PREDEFINED_MODES]={
+	{640,400},
+	{640,480},
+	{800,608},
+	{1024,768},
+	{1152,864},
+	{1280,1024},
+	{1600,1200}	
+};
+
+static const Uint8 mode_bpp[4]={
+	8, 15, 16, 32
+};
+
+void SDL_XBIOS_ListMilanModes(_THIS, int actually_add)
+{
+	int i;
+
+	/* Read infos about current mode */ 
+
+	/* Read validated predefined modes */
+	for (i=0; i<NUM_PREDEFINED_MODES; i++) {
+		int j;
+		Uint16 deviceid = 0x1000 + (i<<4);
+
+		for (j=1; j<4; j++) {
+			if (Validmode(deviceid + j)) {
+				xbiosmode_t modeinfo;
+				
+				modeinfo.number = deviceid + j;
+				modeinfo.width = mode_list[i].width;
+				modeinfo.height = mode_list[i].height;
+				modeinfo.depth = mode_bpp[j-1];
+				modeinfo.doubleline = SDL_FALSE;
+
+				SDL_XBIOS_AddMode(this, actually_add, &modeinfo);
+			}
+		}
+	}
+
+	/* Read custom created modes */
+}
diff --git a/src/video/xbios/SDL_xbios_milan.h b/src/video/xbios/SDL_xbios_milan.h
new file mode 100644
index 000000000..acb1f8b94
--- /dev/null
+++ b/src/video/xbios/SDL_xbios_milan.h
@@ -0,0 +1,125 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2009 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
+*/
+#include "SDL_config.h"
+
+/*
+	Milan Xbios video functions
+
+	Patrice Mandin
+*/
+
+#ifndef _SDL_xbios_milan_h
+#define _SDL_xbios_milan_h
+
+#include "SDL_xbios.h"
+
+/*--- Defines ---*/
+
+/* Cookies */
+#ifndef C__MIL
+#define C__MIL 0x5F4D494CL
+#endif
+
+#ifndef C__VDI
+#define C__VDI 0x5F564449L
+#endif
+
+/* Vsetscreen() parameters */
+#define MI_MAGIC	0x4D49 
+
+enum {
+	CMD_GETMODE=0,
+	CMD_SETMODE,
+	CMD_GETINFO,
+	CMD_ALLOCPAGE,
+	CMD_FREEPAGE,
+	CMD_FLIPPAGE,
+	CMD_ALLOCMEM,
+	CMD_FREEMEM,
+	CMD_SETADR,
+	CMD_ENUMMODES
+};
+
+enum {
+	ENUMMODE_EXIT=0,
+	ENUMMODE_CONT
+};
+
+enum {
+	BLK_ERR=0,
+	BLK_OK,
+	BLK_CLEARED
+};
+
+/* bitFlags */ 
+#define STANDARD_BITS  1 
+#define FALCON_BITS   2 
+#define INTEL_BITS   8 
+
+/*--- Structures ---*/
+
+typedef struct _scrblk { 
+	unsigned long	size;		/* size of strukture */ 
+	unsigned long	blk_status;	/* status bits of blk */ 
+	unsigned long	blk_start;	/* Start Adress */ 
+	unsigned long	blk_len;	/* length of memblk */ 
+	unsigned long	blk_x;		/* x pos in total screen*/ 
+	unsigned long	blk_y;		/* y pos in total screen */ 
+	unsigned long	blk_w;		/* width */ 
+	unsigned long	blk_h;		/* height */ 
+	unsigned long	blk_wrap;	/* width in bytes */ 
+} __attribute__((packed)) SCRMEMBLK;
+
+typedef struct screeninfo { 
+	unsigned long	size;		/* Size of structure */ 
+	unsigned long	devID;		/* device id number */ 
+	unsigned char	name[64];	/* Friendly name of Screen */ 
+	unsigned long	scrFlags;	/* some Flags */ 
+	unsigned long	frameadr;	/* Adress of framebuffer */ 
+	unsigned long	scrHeight;	/* visible X res */ 
+	unsigned long	scrWidth;	/* visible Y res */ 
+	unsigned long	virtHeight;	/* virtual X res */ 
+	unsigned long	virtWidth;	/* virtual Y res */ 
+	unsigned long	scrPlanes;	/* color Planes */ 
+	unsigned long	scrColors;	/* # of colors */ 
+	unsigned long	lineWrap;	/* # of Bytes to next line */ 
+	unsigned long	planeWarp;	/* # of Bytes to next plane */ 
+	unsigned long	scrFormat;	/* screen Format */ 
+	unsigned long	scrClut;	/* type of clut */ 
+	unsigned long	redBits;	/* Mask of Red Bits */ 
+	unsigned long	greenBits;	/* Mask of Green Bits */ 
+	unsigned long	blueBits;	/* Mask of Blue Bits */ 
+	unsigned long	alphaBits;	/* Mask of Alpha Bits */ 
+	unsigned long	genlockBits;/* Mask of Genlock Bits */ 
+	unsigned long	unusedBits;	/* Mask of unused Bits */ 
+	unsigned long	bitFlags;	/* Bits organisation flags */ 
+	unsigned long	maxmem;		/* max. memory in this mode */ 
+	unsigned long	pagemem;	/* needed memory for one page */ 
+	unsigned long	max_x;		/* max. possible width */ 
+	unsigned long	max_y;		/* max. possible heigth */ 
+} __attribute__((packed)) SCREENINFO; 
+
+/*--- Functions prototypes ---*/
+
+void SDL_XBIOS_ListMilanModes(_THIS, int actually_add);
+
+#endif /* _SDL_xbios_milan_h */