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SDL_xbiosmodes.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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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
*/
#include <mint/osbind.h>
#include <mint/falcon.h>
#include "SDL_config.h"
#include "SDL_xbios.h"
#include "SDL_xbiosmodes.h"
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typedef struct
{
int width, height, bpp;
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int modecode;
int doubleline;
} xbios_mode_t;
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static xbios_mode_t falcon_rgb_modes[] = {
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{768, 480, 16, BPS16 | COL80 | OVERSCAN | VERTFLAG},
{768, 240, 16, BPS16 | COL80 | OVERSCAN},
{640, 400, 16, BPS16 | COL80 | VERTFLAG},
{640, 200, 16, BPS16 | COL80},
{384, 480, 16, BPS16 | OVERSCAN | VERTFLAG},
{384, 240, 16, BPS16 | OVERSCAN},
{320, 400, 16, BPS16 | VERTFLAG},
{320, 200, 16, BPS16},
{768, 480, 8, BPS8 | COL80 | OVERSCAN | VERTFLAG},
{768, 240, 8, BPS8 | COL80 | OVERSCAN},
{640, 400, 8, BPS8 | COL80 | VERTFLAG},
{640, 200, 8, BPS8 | COL80},
{384, 480, 8, BPS8 | OVERSCAN | VERTFLAG},
{384, 240, 8, BPS8 | OVERSCAN},
{320, 400, 8, BPS8 | VERTFLAG},
{320, 200, 8, BPS8}
};
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static xbios_mode_t falcon_vga_modes[] = {
{320, 480, 16, BPS16},
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{320, 240, 16, BPS16 | VERTFLAG},
{640, 480, 8, BPS8 | COL80},
{640, 240, 8, BPS8 | COL80 | VERTFLAG},
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{320, 480, 8, BPS8},
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{320, 240, 8, BPS8 | VERTFLAG}
};
static void
SDL_XBIOS_AddMode(_THIS, int width, int height, int bpp, Uint16 modecode,
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SDL_bool doubleline)
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{
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
Uint32 Rmask, Gmask, Bmask, Amask;
int orig_bpp;
Rmask = Gmask = Bmask = Amask = 0;
if (bpp == 16) {
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Rmask = 31 << 11;
Gmask = 63 << 5;
Bmask = 31;
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}
/* Memorize for c2p4 operation */
orig_bpp = bpp;
if (bpp == 4) {
bpp = 8;
}
mode.format = SDL_MasksToPixelFormatEnum(bpp, Rmask, Gmask, Bmask, Amask);
mode.w = width;
mode.h = height;
mode.refresh_rate = 0;
mode.driverdata = NULL;
displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
if (!displaydata) {
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return;
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}
displaydata->modecode = modecode;
displaydata->doubleline = doubleline;
displaydata->c2p4 = (orig_bpp == 4);
SDL_zero(display);
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = displaydata;
SDL_AddVideoDisplay(&display);
}
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/* Current video mode save/restore */
static void
SDL_XBIOS_ModeSave(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
data->old_vbase = Physbase();
switch (data->cookie_vdo >> 16) {
case VDO_ST:
case VDO_STE:
data->old_modecode = Getrez();
break;
case VDO_TT:
data->old_modecode = EgetShift();
break;
case VDO_F30:
data->old_modecode = VsetMode(-1);
break;
}
}
static void
SDL_XBIOS_ModeRestore(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
switch (data->cookie_vdo >> 16) {
case VDO_ST:
case VDO_STE:
Setscreen(-1, data->old_vbase, data->old_modecode);
break;
case VDO_TT:
Setscreen(-1, data->old_vbase, -1);
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EsetShift(data->old_modecode);
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break;
case VDO_F30:
Setscreen(-1, data->old_vbase, -1);
VsetMode(data->old_modecode);
break;
}
}
/* Current palette save/restore */
static void
SDL_XBIOS_PaletteSave(_THIS)
{
int i;
Uint16 *palette;
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
data->old_numcol = 0;
switch (data->cookie_vdo >> 16) {
case VDO_ST:
case VDO_STE:
switch (data->old_modecode << 8) {
case ST_LOW:
data->old_numcol = 16;
break;
case ST_MED:
data->old_numcol = 4;
break;
case ST_HIGH:
data->old_numcol = 2;
break;
}
palette = (Uint16 *) data->old_palette;
for (i = 0; i < data->old_numcol; i++) {
*palette++ = Setcolor(i, -1);
}
break;
case VDO_TT:
switch (data->old_modecode & ES_MODE) {
case TT_LOW:
data->old_numcol = 256;
break;
case ST_LOW:
case TT_MED:
data->old_numcol = 16;
break;
case ST_MED:
data->old_numcol = 4;
break;
case ST_HIGH:
case TT_HIGH:
data->old_numcol = 2;
break;
}
if (data->old_numcol) {
EgetPalette(0, data->old_numcol, data->old_palette);
}
break;
case VDO_F30:
data->old_numcol = 1 << (1 << (data->old_modecode & NUMCOLS));
if (data->old_numcol > 256) {
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data->old_numcol = 0;
} else {
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VgetRGB(0, data->old_numcol, data->old_palette);
}
break;
}
}
static void
SDL_XBIOS_PaletteRestore(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
if (data->old_numcol == 0) {
return;
}
switch (data->cookie_vdo >> 16) {
case VDO_ST:
case VDO_STE:
Setpalette(data->old_palette);
break;
case VDO_TT:
EsetPalette(0, data->old_numcol, data->old_palette);
break;
case VDO_F30:
VsetRGB(0, data->old_numcol, data->old_palette);
break;
}
}
/* Public functions for use by the driver */
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void
SDL_XBIOS_InitModes(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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SDL_XBIOS_PaletteSave(_this);
SDL_XBIOS_ModeSave(_this);
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switch (data->cookie_vdo >> 16) {
case VDO_ST:
case VDO_STE:
{
SDL_XBIOS_AddMode(_this, 320, 200, 4, ST_LOW >> 8, SDL_FALSE);
}
break;
case VDO_TT:
{
SDL_XBIOS_AddMode(_this, 320, 480, 8, TT_LOW, SDL_FALSE);
/* Software double-lined mode */
SDL_XBIOS_AddMode(_this, 320, 240, 8, TT_LOW, SDL_TRUE);
}
break;
case VDO_F30:
{
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Uint16 modecodemask = data->old_modecode & (VGA | PAL);
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int i;
switch (VgetMonitor()) {
case MONITOR_MONO:
/* Not usable */
break;
case MONITOR_RGB:
case MONITOR_TV:
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for (i = 0;
i < sizeof(falcon_rgb_modes) / sizeof(xbios_mode_t);
i++) {
SDL_XBIOS_AddMode(_this, falcon_rgb_modes[i].width,
falcon_rgb_modes[i].height,
falcon_rgb_modes[i].bpp,
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falcon_rgb_modes[i].modecode &
modecodemask, SDL_FALSE);
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}
break;
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case MONITOR_VGA:
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for (i = 0;
i < sizeof(falcon_vga_modes) / sizeof(xbios_mode_t);
i++) {
SDL_XBIOS_AddMode(_this, falcon_vga_modes[i].width,
falcon_vga_modes[i].height,
falcon_vga_modes[i].bpp,
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falcon_vga_modes[i].modecode &
modecodemask, SDL_FALSE);
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}
break;
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}
}
break;
}
}
void
SDL_XBIOS_GetDisplayModes(_THIS)
{
SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
SDL_DisplayMode mode;
//SDL_AddDisplayMode(_this->current_display, &mode);
}
int
SDL_XBIOS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
{
//SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
return -1;
}
void
SDL_XBIOS_QuitModes(_THIS)
{
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SDL_XBIOS_ModeRestore(_this);
SDL_XBIOS_PaletteRestore(_this);
Vsync();
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}
/* vi: set ts=4 sw=4 expandtab: */