void gr_palette_read (ubyte *pal)
{
ggi_color colors[256];
int i, j;
ggiGetPalette (screenvis, 0, 256, colors);
for (i = 0, j = 0; i < 256; i++)
{
pal[j++] = colors[i].r / 0x3ff;
pal[j++] = colors[i].g / 0x3ff;
pal[j++] = colors[i].b / 0x3ff;
}
}
SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags)
{
ggi_mode mode =
{
1,
{ GGI_AUTO, GGI_AUTO },
{ GGI_AUTO, GGI_AUTO },
{ 0, 0 },
GT_AUTO,
{ GGI_AUTO, GGI_AUTO }
};
const ggi_directbuffer *db;
ggi_color pal[256];
int err;
fprintf(stderr, "GGI_SetVideoMode()\n");
mode.visible.x = mode.virt.x = width;
mode.visible.y = mode.virt.y = height;
/* Translate requested SDL bit depth into a GGI mode */
switch (bpp)
{
case 1: mode.graphtype = GT_1BIT; break;
case 2: mode.graphtype = GT_2BIT; break;
case 4: mode.graphtype = GT_4BIT; break;
case 8: mode.graphtype = GT_8BIT; break;
case 15: mode.graphtype = GT_15BIT; break;
case 16: mode.graphtype = GT_16BIT; break;
case 24: mode.graphtype = GT_24BIT; break;
case 32: mode.graphtype = GT_32BIT; break;
default:
SDL_SetError("Unknown SDL bit depth, using GT_AUTO....\n");
mode.graphtype = GT_AUTO;
}
/* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */
ggiCheckMode(VIS, &mode);
/* At this point we should have a valid mode - try to set it */
err = ggiSetMode(VIS, &mode);
/* If we couldn't set _any_ modes, something is very wrong */
if (err)
{
SDL_SetError("Can't set a mode!\n");
ggiClose(VIS);
ggiExit();
GGI_VideoQuit(NULL);
}
/* Set a palette for palletized modes */
if (GT_SCHEME(mode.graphtype) == GT_PALETTE)
{
ggiSetColorfulPalette(VIS);
ggiGetPalette(VIS, 0, 1 << bpp, pal);
}
db = ggiDBGetBuffer(VIS, 0);
/* Set up the new mode framebuffer */
current->flags = (SDL_FULLSCREEN | SDL_HWSURFACE);
current->w = mode.virt.x;
current->h = mode.virt.y;
current->pitch = db->buffer.plb.stride;
current->pixels = db->read;
/* Set the blit function */
this->UpdateRects = GGI_DirectUpdate;
/* We're done */
return(current);
}
int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
ggi_mode mode =
{
1,
{ GGI_AUTO, GGI_AUTO },
{ GGI_AUTO, GGI_AUTO },
{ 0, 0 },
GT_AUTO,
{ GGI_AUTO, GGI_AUTO }
};
struct private_hwdata *priv;
ggi_color pal[256], map[256];
const ggi_directbuffer *db;
int err, num_bufs;
ggi_pixel white, black;
priv = SDL_malloc(sizeof(struct private_hwdata));
if (priv == NULL)
{
SDL_SetError("Unhandled GGI mode type!\n");
GGI_VideoQuit(NULL);
}
if (ggiInit() != 0)
{
SDL_SetError("Unable to initialize GGI!\n");
GGI_VideoQuit(NULL);
}
VIS = ggiOpen(NULL);
if (VIS == NULL)
{
SDL_SetError("Unable to open default GGI visual!\n");
ggiExit();
GGI_VideoQuit(NULL);
}
ggiSetFlags(VIS, GGIFLAG_ASYNC);
/* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */
ggiCheckMode(VIS, &mode);
/* At this point we should have a valid mode - try to set it */
err = ggiSetMode(VIS, &mode);
/* If we couldn't set _any_ modes, something is very wrong */
if (err)
{
SDL_SetError("Can't set a mode!\n");
ggiClose(VIS);
ggiExit();
GGI_VideoQuit(NULL);
}
/* Determine the current screen size */
this->info.current_w = mode.virt.x;
this->info.current_h = mode.virt.y;
/* Set a palette for palletized modes */
if (GT_SCHEME(mode.graphtype) == GT_PALETTE)
{
ggiSetColorfulPalette(VIS);
ggiGetPalette(VIS, 0, 1 << vformat->BitsPerPixel, pal);
}
/* Now we try to get the DirectBuffer info, which determines whether
* SDL can access hardware surfaces directly. */
num_bufs = ggiDBGetNumBuffers(VIS);
if (num_bufs > 0)
{
db = ggiDBGetBuffer(VIS, 0); /* Only handle one DB for now */
vformat->BitsPerPixel = db->buffer.plb.pixelformat->depth;
vformat->Rmask = db->buffer.plb.pixelformat->red_mask;
vformat->Gmask = db->buffer.plb.pixelformat->green_mask;
vformat->Bmask = db->buffer.plb.pixelformat->blue_mask;
/* Fill in our hardware acceleration capabilities */
this->info.wm_available = 0;
this->info.hw_available = 1;
this->info.video_mem = db->buffer.plb.stride * mode.virt.y;
}
video_mode.x = 0;
video_mode.y = 0;
video_mode.w = mode.virt.x;
video_mode.h = mode.virt.y;
SDL_modelist[((vformat->BitsPerPixel + 7) / 8) - 1] = &video_mode;
/* We're done! */
return(0);
}