Mercurial > sdl-ios-xcode
view src/video/ataricommon/SDL_xbiosinterrupt.S @ 1240:3b8a43c428bb
From Bug #36:
There are a couple of issues with the selection of Altivec alpha-blitting
routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c.
1) There's no check for the presence of Altivec when checking if the
Blit32to565PixelAlphaAltivec() routine can be selected.
2) Altivec cannot be used in video memory, and there's no check if the
destination surface is a hardware surface. (Alpha-blitting to a hardware
surface with GPU support is a bad idea, but somebody's bound to do it anyway.)
Patch to fix these attached.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sun, 08 Jan 2006 21:18:15 +0000 |
parents | 0fb50bfaea7f |
children | c9b51268668f |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* * 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