void S9xGraphicsMode ()
{
if (text_mode)
{
screen_width = modes [mode].width;
screen_height = modes [mode].height;
int ret = vga_setmode (modes [mode].mode);
if (ret < 0)
{
fprintf (stderr, "Unable to switch to requested screen mode/resolution:\n");
S9xExit ();
}
if (vga_setlinearaddressing () < 0)
{
if (info->flags & EXT_INFO_AVAILABLE)
video_page_size = info->aperture_size;
else
video_page_size = 64 * 1024;
}
else
video_page_size = ~0;
if (modes [mode].mode == G320x200x256 && screen_width == 256)
{
iopl(3);
outRegArray (scr256x256, sizeof (scr256x256) / sizeof (Register));
screen_pitch = screen_width;
}
gl_setcontextvga (modes [mode].mode);
if (keyboard_init ())
{
fprintf (stdout, "Keyboard initialisation failed.\n");
S9xExit ();
}
keyboard_seteventhandler(&_S9xSVGAKeyboardHandler);
text_mode = FALSE;
if (DeltaScreen)
memset (DeltaScreen, 0xff, GFX.Pitch * IMAGE_HEIGHT);
}
}
void S9xGraphicsMode ()
{
if (in_text_mode)
{
if (mode < 0)
{
if (Settings.SixteenBit)
{
if (Settings.SupportHiRes || interpolate)
mode = 10;
else
mode = 9;
}
else
{
if (Settings.SupportHiRes)
mode = 3;
else
mode = 2;
}
}
int ret;
do
{
screen_width = modes [mode].width;
screen_height = modes [mode].height;
set_color_depth (Settings.SixteenBit ? 16: 8);
if (modes [mode].mode == GFX_VGA)
ret = set_gfx_mode (modes [mode].mode, 320, 200, 0, 0);
else
ret = set_gfx_mode (modes [mode].mode, modes [mode].width,
modes [mode].height, 0, 0);
} while (ret < 0 && ++mode < COUNT(modes));
planar = modes [mode].mode == GFX_MODEX;
if (ret < 0)
{
fprintf (stderr, "Unable to switch to requested screen mode/resolution:\n%s\n",
allegro_error);
S9xExit ();
}
if (modes [mode].mode == GFX_VGA && screen_width == 256)
{
outRegArray (scr256x256, sizeof (scr256x256) / sizeof (Register));
screen->w = screen->cr = 256;
screen->h = screen->cb = 256;
for (int i = 1; i < 256; i++)
screen->line[i] = screen->line[i - 1] + 256;
}
clear_to_color (screen, 0);
if (install_keyboard ())
{
set_gfx_mode (GFX_TEXT, 0, 0, 0, 0);
fprintf (stdout, "Keyboard initialisation failed.\n");
S9xExit ();
}
if (!install_mouse ())
{
mouse_installed = TRUE;
set_mouse_range (0, 0, screen_width, screen_height);
position_mouse (screen_width / 2, screen_height / 2);
prev_mouse_x = mouse_x;
prev_mouse_y = mouse_y;
}
else
mouse_installed = FALSE;
in_text_mode = FALSE;
}
}
