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Date: Tue, 4 Mar 2003 15:05:31 -0800 From: "Jim" Subject: [SDL] Frame Buffer patches... Okay I'm new at patch generation - so please tell me if there's a better way I could have done this. Attached are two patch files generated with 'cvs diff -u' SDL-fb-open-lock.patch applies to SDL_fbvideo.c Modifies the open loop to check /dev/fb/0 found on devfs... Modifies the lock code to return failure if the current virtual terminal is not the one opened for frame buffer writing... Lock would hang forever if switched away (ctrl-alt-F1) ... SDL-fb-mousedrv-screensave.patch applies to SDL_fbevents.c Switches default mouse mode based on SDL_MOUSEDRV - currently only accepts PS2 - otherwise default is MS Mouse. When the screen is switched - exisiting code (wrapped in ifdef SAVE_SCREEN_COTENTS) would save the wrong bit of the screen.... ( I run frame buffer 1600x1200, the size I requested was 800x600 - the save would save the top 800 lines (non biased) and restore them... Adding screen->offset fixed that ) However, if that option is not set, then a call to SDL_UpdateRect (full screen) is made. (which may have had it's contents changed since the screen is not entirely locked because of lock-failure patch) Jim [patches slightly tweaked for SDL 1.2.10]
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 07:48:22 +0000
parents c9b51268668f
children b7d426b28c18
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/*
 *	XBIOS mouse & joystick vectors
 *
 *	Patrice Mandin
 */

	.text

	.globl	_SDL_AtariXbios_Install
	.globl	_SDL_AtariXbios_Restore
	.globl	_SDL_AtariXbios_MouseVector
	.globl	_SDL_AtariXbios_JoystickVector

	.globl	_SDL_AtariXbios_mouseb
	.globl	_SDL_AtariXbios_mousex
	.globl	_SDL_AtariXbios_mousey
	.globl	_SDL_AtariXbios_joystick

/*--- Vector installer ---*/

_SDL_AtariXbios_Install:
	movel	sp@(4),a0

	/* Stop interrupts */

	movew	#0x2700,sr

	/* Save old mouse vector, set our routine */

	clrl	oldmousevector
	movel	sp@(8),d0
	beqs	no_new_mouse_vector
	movel	a0@(16),oldmousevector
	movel	d0,a0@(16)
no_new_mouse_vector:

	/* Save old joystick vector, set our routine */

	clrl	oldjoystickvector
	movel	sp@(12),d0
	beqs	no_new_joystick_vector
	movel	a0@(24),oldjoystickvector
	movel	d0,a0@(24)
no_new_joystick_vector:

	/* Restart interrupts */

	movew	#0x2300,sr

	rts

/*--- Vector restorer ---*/

_SDL_AtariXbios_Restore:
	movel	sp@(4),a0

	/* Stop interrupts */

	movew	#0x2700,sr

	/* Restore mouse vector */

	movel	oldmousevector,d0
	beqs	no_restore_mouse
	movel	d0,a0@(16)
no_restore_mouse:

	/* Restore joystick vector */

	movel	oldjoystickvector,d0
	beqs	no_restore_joystick
	movel	d0,a0@(24)
no_restore_joystick:

	/* Restart interrupts */

	movew	#0x2300,sr

	rts

/*--- Our mouse vector ---*/

	.text
	.even
	.ascii "XBRA"
	.ascii "LSDL"
	.comm	oldmousevector,4*1
_SDL_AtariXbios_MouseVector:
	movel	d0,sp@-

	/* Mouse buttons */
	moveb	(a0),d0
	andw	#3,d0
	movew	d0,_SDL_AtariXbios_mouseb

	/* X movement */
	moveb	a0@(1),d0
	extw	d0
	addw	d0,_SDL_AtariXbios_mousex

	/* Y movement */
	moveb	a0@(2),d0
	extw	d0
	addw	d0,_SDL_AtariXbios_mousey

	/* Jump through old vector */
	movel	sp@+,d0

	movel	oldmousevector,sp@-
	rts

	.data
	.even
	.comm	_SDL_AtariXbios_mousex,2*1
	.even
	.comm	_SDL_AtariXbios_mousey,2*1
	.even
	.comm	_SDL_AtariXbios_mouseb,2*1

/*--- Our joystick vector ---*/

	.text
	.even
	.ascii "XBRA"
	.ascii "LSDL"
	.comm	oldjoystickvector,4*1
_SDL_AtariXbios_JoystickVector:
	movel	d0,sp@-

	/* New joystick state */
	moveb	a0@(2),d0
	andw	#0x8f,d0
	movew	d0,_SDL_AtariXbios_joystick

	/* Jump through old vector */
	movel	sp@+,d0

	movel	oldjoystickvector,sp@-
	rts

	.data
	.even
	.comm	_SDL_AtariXbios_joystick,2*1