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https://github.com/yawut/SDL.git
synced 2026-08-02 08:28:28 -05:00
Preliminary support for Blowup and Screen Blaster 3 extensions on Atari Falcon 030
This commit is contained in:
Patrice Mandin
parent
54d5471cf7
commit
4de6d491f3
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@ -7,4 +7,8 @@ libvideo_xbios_la_SOURCES = $(XBIOS_SRCS)
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# The SDL XBIOS video driver sources
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XBIOS_SRCS = \
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SDL_xbios.c \
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SDL_xbios.h
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SDL_xbios.h \
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SDL_xbios_blowup.c \
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SDL_xbios_blowup.h \
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SDL_xbios_sb3.c \
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SDL_xbios_sb3.h
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@ -55,6 +55,8 @@ static char rcsid =
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#include "SDL_atarimxalloc_c.h"
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#include "SDL_atarigl_c.h"
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#include "SDL_xbios.h"
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#include "SDL_xbios_blowup.h"
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#include "SDL_xbios_sb3.h"
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#define XBIOS_VID_DRIVER_NAME "xbios"
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@ -138,7 +140,7 @@ static unsigned long F30_palette[256];
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static int XBIOS_Available(void)
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{
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unsigned long cookie_vdo, cookie_mil, cookie_hade;
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unsigned long cookie_vdo, cookie_mil, cookie_hade, cookie_scpn;
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/* Milan/Hades Atari clones do not have an Atari video chip */
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if ( (Getcookie(C__MIL, &cookie_mil) == C_FOUND) ||
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@ -165,6 +167,11 @@ static int XBIOS_Available(void)
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case VDO_F30:
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if ( Montype() == MONITOR_MONO)
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return 0;
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if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
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if (!SDL_XBIOS_SB3Usable((scpn_cookie_t *)cookie_scpn)) {
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return 0;
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}
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}
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break;
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default:
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return 0;
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@ -242,6 +249,7 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
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{
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int i,j8,j16;
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xbiosmode_t *current_mode;
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unsigned long cookie_blow, cookie_scpn;
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/* Initialize all variables that we clean on shutdown */
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memset (SDL_modelist, 0, sizeof(SDL_modelist));
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@ -369,6 +377,13 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
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current_mode++;
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}
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/* Initialize BlowUp or SB3 stuff if present */
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if (Getcookie(C_BLOW, &cookie_blow) == C_FOUND) {
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SDL_XBIOS_BlowupInit(this, (blow_cookie_t *)cookie_blow);
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} else if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
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SDL_XBIOS_SB3Init(this, (scpn_cookie_t *)cookie_scpn);
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}
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break;
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}
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93
src/video/xbios/SDL_xbios_blowup.c
Normal file
93
src/video/xbios/SDL_xbios_blowup.c
Normal file
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@ -0,0 +1,93 @@
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2004 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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/*
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Blowup extension definitions
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Patrice Mandin
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*/
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#include "SDL_xbios.h"
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#include "SDL_xbios_blowup.h"
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void SDL_XBIOS_BlowupInit(_THIS, blow_cookie_t *cookie_blow)
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{
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int i, num_mode, bank, keep_old;
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xbiosmode_t *current_mode;
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blow_mode_t *blow_mode;
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current_mode = XBIOS_modelist;
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for (i=0;i<XBIOS_nummodes;i++) {
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keep_old=1; /* use default mode */
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blow_mode = NULL;
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switch (current_mode->depth) {
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case 1:
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num_mode=0;
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break;
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case 2:
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num_mode=1;
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break;
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case 4:
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num_mode=2;
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break;
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case 8:
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num_mode=3;
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break;
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case 16:
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num_mode=4;
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break;
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default:
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num_mode=-1;
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break;
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}
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/* Check which bank of modes to use */
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if (num_mode>=0) {
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bank = cookie_blow->num_mode[num_mode];
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blow_mode = &(cookie_blow->blowup_modes[num_mode+(bank*5)]);
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/* Check extended mode enabled */
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if (blow_mode->enabled == 0) {
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/* Check monitor needed for this mode */
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if ((blow_mode->monitor == cookie_blow->montype)
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|| ((blow_mode->monitor == MONITOR_TV)
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&& (cookie_blow->montype == MONITOR_RGB))
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|| ((blow_mode->monitor == MONITOR_RGB)
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&& (cookie_blow->montype == MONITOR_TV)))
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{
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keep_old = 0; /* we can use this extended mode */
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}
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}
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}
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if (keep_old) {
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/* disable blowup for this mode */
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current_mode->number |= (1<<15);
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} else {
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/* Update mode size */
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current_mode->width = blow_mode->width +1;
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current_mode->height = blow_mode->height +1;
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}
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current_mode++;
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}
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}
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85
src/video/xbios/SDL_xbios_blowup.h
Normal file
85
src/video/xbios/SDL_xbios_blowup.h
Normal file
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@ -0,0 +1,85 @@
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2004 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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/*
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Blowup extension definitions
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Patrice Mandin
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*/
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#ifndef _SDL_xbios_blowup_h
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#define _SDL_xbios_blowup_h
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#include "SDL_xbios.h"
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/*--- Types ---*/
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typedef struct {
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/* 64 bytes */
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unsigned short enabled; /* Extended mode enabled ? 0=yes, <>0=no */
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unsigned short dummy10[6];
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unsigned short registers_0E; /* value for register 0xffff820e */
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unsigned short registers_10; /* value for register 0xffff8210 */
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unsigned short dummy11[23];
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/* 64 bytes */
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unsigned short width; /* width-1 */
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unsigned short height; /* height-1 */
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unsigned short dummy20;
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unsigned long screensize; /* screensize in bytes */
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unsigned short dummy21[8];
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unsigned short virtual; /* Virtual screen ? */
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unsigned short virwidth; /* Virtual screen width */
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unsigned short virheight; /* Virtual screen height */
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unsigned short dummy22;
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unsigned short monitor; /* Monitor defined for this mode */
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unsigned short extension; /* Extended mode defined ? 0=yes, 1=no */
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unsigned short dummy23[13];
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/* 64 bytes */
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unsigned short dummy30;
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unsigned short registers_82[6]; /* values for registers 0xffff8282-8c */
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unsigned short dummy31[9];
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unsigned short dummy32;
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unsigned short registers_A2[6]; /* values for registers 0xffff82a2-ac */
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unsigned short dummy33[9];
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/* 64 bytes */
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unsigned short registers_C0; /* value for register 0xffff82c0 */
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unsigned short registers_C2; /* value for register 0xffff82c2 */
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unsigned short dummy40[30];
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} __attribute__((packed)) blow_mode_t;
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typedef struct {
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blow_mode_t blowup_modes[10];
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unsigned char num_mode[6];
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unsigned long dummy;
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unsigned short montype;
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} __attribute__((packed)) blow_cookie_t;
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/*--- Functions prototypes ---*/
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void SDL_XBIOS_BlowupInit(_THIS, blow_cookie_t *cookie_blow);
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#endif /* _SDL_xbios_blowup_h */
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80
src/video/xbios/SDL_xbios_sb3.c
Normal file
80
src/video/xbios/SDL_xbios_sb3.c
Normal file
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@ -0,0 +1,80 @@
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2004 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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/*
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ScreenBlaster 3 functions
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Patrice Mandin
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*/
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/*--- Includes ---*/
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#include "SDL_xbios.h"
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#include "SDL_xbios_sb3.h"
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/*--- Defines ---*/
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const int SDL_XBIOS_scpn_planes_device[]={
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SCPN_DEV_1BPP,
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SCPN_DEV_4BPP,
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SCPN_DEV_8BPP,
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SCPN_DEV_16BPP,
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SCPN_DEV_2BPP,
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SCPN_DEV_4BPP,
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SCPN_DEV_1BPP
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};
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/*--- Functions ---*/
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int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn)
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{
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scpn_screeninfo_t *scrinfo;
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int bpp;
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/* Check if current SB3 mode is usable, i.e. 8 or 16bpp */
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scrinfo = cookie_scpn->screen_info;
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bpp = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]);
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if ((bpp==8) || (bpp==16)) {
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return 1;
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}
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return 0;
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}
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void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t *cookie_scpn)
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{
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xbiosmode_t *current_mode;
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scpn_screeninfo_t *scrinfo;
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/* SB3 prevent changing video modes, we can only use current one */
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XBIOS_nummodes = 1;
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current_mode = XBIOS_modelist;
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current_mode->number = -1;
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scrinfo = cookie_scpn->screen_info;
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current_mode->width = scrinfo->virtual_width;
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current_mode->height = scrinfo->virtual_height;
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current_mode->depth = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]);
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scrinfo->h_pos = scrinfo->v_pos = 0;
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}
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81
src/video/xbios/SDL_xbios_sb3.h
Normal file
81
src/video/xbios/SDL_xbios_sb3.h
Normal file
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@ -0,0 +1,81 @@
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2004 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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/*
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ScreenBlaster 3 definitions
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Patrice Mandin
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*/
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#ifndef _SDL_xbios_sb3_h_
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#define _SDL_xbios_sb3_h_
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/*--- Defines ---*/
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#ifndef C_SCPN
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#define C_SCPN 0x5343504EL
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#endif
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#define SCPN_DEV_1BPP 0
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#define SCPN_DEV_2BPP 1
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#define SCPN_DEV_4BPP 2
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#define SCPN_DEV_8BPP 3
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#define SCPN_DEV_16BPP 4
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extern const int SDL_XBIOS_scpn_planes_device[];
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/*--- Types ---*/
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typedef struct {
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unsigned short virtual_width; /* Virtual screen width */
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unsigned short virtual_height; /* Virtual screen height */
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unsigned short visible_width; /* Visible width */
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unsigned short visible_height; /* Visible height */
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unsigned short h_pos; /* Horizontal position in virtual screen */
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unsigned short v_pos; /* Vertical position in virtual screen */
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unsigned short dummy;
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unsigned long size; /* Size of screen in bytes */
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unsigned short device; /* Device number to find planes = getRez() */
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/* = Index in scpn_planes_device[] */
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} __attribute__((packed)) scpn_screeninfo_t;
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typedef struct {
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unsigned long magic; /* just a BRA assembler jump */
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unsigned short version;
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void *dummy1;
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unsigned short ptsout0_1;
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unsigned short ptsout0_2;
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unsigned short dummy3;
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unsigned char date[8]; /* Date of program build */
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unsigned char asm_string[30]; /* 10 times the 'ASM' string */
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unsigned short dummy4;
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scpn_screeninfo_t *screen_info;
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unsigned short dummy6;
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} __attribute__((packed)) scpn_cookie_t;
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/*--- Function prototypes ---*/
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int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn);
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void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t *cookie_scpn);
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#endif /* _SDL_xbios_sb3_h_ */
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