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Preliminary support for Blowup and Screen Blaster 3 extensions on Ata…
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/* | ||
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 | ||
*/ | ||
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||
/* | ||
Blowup extension definitions | ||
Patrice Mandin | ||
*/ | ||
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#include "SDL_xbios.h" | ||
#include "SDL_xbios_blowup.h" | ||
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void SDL_XBIOS_BlowupInit(_THIS, blow_cookie_t *cookie_blow) | ||
{ | ||
int i, num_mode, bank, keep_old; | ||
xbiosmode_t *current_mode; | ||
blow_mode_t *blow_mode; | ||
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current_mode = XBIOS_modelist; | ||
for (i=0;i<XBIOS_nummodes;i++) { | ||
keep_old=1; /* use default mode */ | ||
blow_mode = NULL; | ||
switch (current_mode->depth) { | ||
case 1: | ||
num_mode=0; | ||
break; | ||
case 2: | ||
num_mode=1; | ||
break; | ||
case 4: | ||
num_mode=2; | ||
break; | ||
case 8: | ||
num_mode=3; | ||
break; | ||
case 16: | ||
num_mode=4; | ||
break; | ||
default: | ||
num_mode=-1; | ||
break; | ||
} | ||
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/* Check which bank of modes to use */ | ||
if (num_mode>=0) { | ||
bank = cookie_blow->num_mode[num_mode]; | ||
blow_mode = &(cookie_blow->blowup_modes[num_mode+(bank*5)]); | ||
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/* Check extended mode enabled */ | ||
if (blow_mode->enabled == 0) { | ||
/* Check monitor needed for this mode */ | ||
if ((blow_mode->monitor == cookie_blow->montype) | ||
|| ((blow_mode->monitor == MONITOR_TV) | ||
&& (cookie_blow->montype == MONITOR_RGB)) | ||
|| ((blow_mode->monitor == MONITOR_RGB) | ||
&& (cookie_blow->montype == MONITOR_TV))) | ||
{ | ||
keep_old = 0; /* we can use this extended mode */ | ||
} | ||
} | ||
} | ||
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if (keep_old) { | ||
/* disable blowup for this mode */ | ||
current_mode->number |= (1<<15); | ||
} else { | ||
/* Update mode size */ | ||
current_mode->width = blow_mode->width +1; | ||
current_mode->height = blow_mode->height +1; | ||
} | ||
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current_mode++; | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,85 @@ | ||
/* | ||
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 | ||
*/ | ||
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/* | ||
Blowup extension definitions | ||
Patrice Mandin | ||
*/ | ||
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#ifndef _SDL_xbios_blowup_h | ||
#define _SDL_xbios_blowup_h | ||
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#include "SDL_xbios.h" | ||
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/*--- Types ---*/ | ||
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typedef struct { | ||
/* 64 bytes */ | ||
unsigned short enabled; /* Extended mode enabled ? 0=yes, <>0=no */ | ||
unsigned short dummy10[6]; | ||
unsigned short registers_0E; /* value for register 0xffff820e */ | ||
unsigned short registers_10; /* value for register 0xffff8210 */ | ||
unsigned short dummy11[23]; | ||
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/* 64 bytes */ | ||
unsigned short width; /* width-1 */ | ||
unsigned short height; /* height-1 */ | ||
unsigned short dummy20; | ||
unsigned long screensize; /* screensize in bytes */ | ||
unsigned short dummy21[8]; | ||
unsigned short virtual; /* Virtual screen ? */ | ||
unsigned short virwidth; /* Virtual screen width */ | ||
unsigned short virheight; /* Virtual screen height */ | ||
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unsigned short dummy22; | ||
unsigned short monitor; /* Monitor defined for this mode */ | ||
unsigned short extension; /* Extended mode defined ? 0=yes, 1=no */ | ||
unsigned short dummy23[13]; | ||
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/* 64 bytes */ | ||
unsigned short dummy30; | ||
unsigned short registers_82[6]; /* values for registers 0xffff8282-8c */ | ||
unsigned short dummy31[9]; | ||
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unsigned short dummy32; | ||
unsigned short registers_A2[6]; /* values for registers 0xffff82a2-ac */ | ||
unsigned short dummy33[9]; | ||
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/* 64 bytes */ | ||
unsigned short registers_C0; /* value for register 0xffff82c0 */ | ||
unsigned short registers_C2; /* value for register 0xffff82c2 */ | ||
unsigned short dummy40[30]; | ||
} __attribute__((packed)) blow_mode_t; | ||
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typedef struct { | ||
blow_mode_t blowup_modes[10]; | ||
unsigned char num_mode[6]; | ||
unsigned long dummy; | ||
unsigned short montype; | ||
} __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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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,80 @@ | ||
/* | ||
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 | ||
*/ | ||
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/* | ||
ScreenBlaster 3 functions | ||
Patrice Mandin | ||
*/ | ||
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/*--- Includes ---*/ | ||
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#include "SDL_xbios.h" | ||
#include "SDL_xbios_sb3.h" | ||
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/*--- Defines ---*/ | ||
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const int SDL_XBIOS_scpn_planes_device[]={ | ||
SCPN_DEV_1BPP, | ||
SCPN_DEV_4BPP, | ||
SCPN_DEV_8BPP, | ||
SCPN_DEV_16BPP, | ||
SCPN_DEV_2BPP, | ||
SCPN_DEV_4BPP, | ||
SCPN_DEV_1BPP | ||
}; | ||
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/*--- Functions ---*/ | ||
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int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn) | ||
{ | ||
scpn_screeninfo_t *scrinfo; | ||
int bpp; | ||
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/* Check if current SB3 mode is usable, i.e. 8 or 16bpp */ | ||
scrinfo = cookie_scpn->screen_info; | ||
bpp = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]); | ||
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if ((bpp==8) || (bpp==16)) { | ||
return 1; | ||
} | ||
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return 0; | ||
} | ||
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void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t *cookie_scpn) | ||
{ | ||
xbiosmode_t *current_mode; | ||
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; | ||
current_mode = XBIOS_modelist; | ||
current_mode->number = -1; | ||
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scrinfo = cookie_scpn->screen_info; | ||
current_mode->width = scrinfo->virtual_width; | ||
current_mode->height = scrinfo->virtual_height; | ||
current_mode->depth = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]); | ||
scrinfo->h_pos = scrinfo->v_pos = 0; | ||
} |
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