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SDL_ggivideo.c
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/*
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SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 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.
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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.
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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
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Sam Lantinga
slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* GGI-based SDL video driver implementation.
*/
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <ggi/ggi.h>
#include <ggi/gii.h>
#include "SDL_video.h"
#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_ggivideo.h"
#include "SDL_ggimouse_c.h"
#include "SDL_ggievents_c.h"
struct private_hwdata
{
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ggi_visual_t vis;
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};
ggi_visual_t VIS;
/* Initialization/Query functions */
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static int GGI_VideoInit (_THIS, SDL_PixelFormat * vformat);
static SDL_Rect **GGI_ListModes (_THIS, SDL_PixelFormat * format,
Uint32 flags);
static SDL_Surface *GGI_SetVideoMode (_THIS, SDL_Surface * current, int width,
int height, int bpp, Uint32 flags);
static int GGI_SetColors (_THIS, int firstcolor, int ncolors,
SDL_Color * colors);
static void GGI_VideoQuit (_THIS);
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/* Hardware surface functions */
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static int GGI_AllocHWSurface (_THIS, SDL_Surface * surface);
static int GGI_LockHWSurface (_THIS, SDL_Surface * surface);
static void GGI_UnlockHWSurface (_THIS, SDL_Surface * surface);
static void GGI_FreeHWSurface (_THIS, SDL_Surface * surface);
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/* GGI driver bootstrap functions */
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static int
GGI_Available (void)
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{
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ggi_visual_t *vis;
vis = NULL;
if (ggiInit () == 0) {
vis = ggiOpen (NULL);
if (vis != NULL) {
ggiClose (vis);
}
}
return (vis != NULL);
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}
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static void
GGI_DeleteDevice (SDL_VideoDevice * device)
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{
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SDL_free (device->hidden);
SDL_free (device);
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}
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static SDL_VideoDevice *
GGI_CreateDevice (int devindex)
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{
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SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_malloc (sizeof (SDL_VideoDevice));
if (device) {
SDL_memset (device, 0, (sizeof *device));
device->hidden = (struct SDL_PrivateVideoData *)
SDL_malloc ((sizeof *device->hidden));
}
if ((device == NULL) || (device->hidden == NULL)) {
SDL_OutOfMemory ();
if (device) {
SDL_free (device);
}
return (0);
}
SDL_memset (device->hidden, 0, (sizeof *device->hidden));
/* Set the function pointers */
device->VideoInit = GGI_VideoInit;
device->ListModes = GGI_ListModes;
device->SetVideoMode = GGI_SetVideoMode;
device->SetColors = GGI_SetColors;
device->UpdateRects = NULL;
device->VideoQuit = GGI_VideoQuit;
device->AllocHWSurface = GGI_AllocHWSurface;
device->CheckHWBlit = NULL;
device->FillHWRect = NULL;
device->SetHWColorKey = NULL;
device->SetHWAlpha = NULL;
device->LockHWSurface = GGI_LockHWSurface;
device->UnlockHWSurface = GGI_UnlockHWSurface;
device->FlipHWSurface = NULL;
device->FreeHWSurface = GGI_FreeHWSurface;
device->SetCaption = NULL;
device->SetIcon = NULL;
device->IconifyWindow = NULL;
device->GrabInput = NULL;
device->GetWMInfo = NULL;
device->InitOSKeymap = GGI_InitOSKeymap;
device->PumpEvents = GGI_PumpEvents;
device->free = GGI_DeleteDevice;
return device;
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}
VideoBootStrap GGI_bootstrap = {
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"ggi", "General Graphics Interface (GGI)",
GGI_Available, GGI_CreateDevice
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};
static SDL_Rect video_mode;
static SDL_Rect *SDL_modelist[4] = { NULL, NULL, NULL, NULL };
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int
GGI_VideoInit (_THIS, SDL_PixelFormat * vformat)
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{
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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);
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}
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static SDL_Rect **
GGI_ListModes (_THIS, SDL_PixelFormat * format, Uint32 flags)
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{
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return (&SDL_modelist[((format->BitsPerPixel + 7) / 8) - 1]);
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}
/* Various screen update functions available */
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static void GGI_DirectUpdate (_THIS, int numrects, SDL_Rect * rects);
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SDL_Surface *
GGI_SetVideoMode (_THIS, SDL_Surface * current, int width, int height,
int bpp, Uint32 flags)
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{
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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);
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}
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static int
GGI_AllocHWSurface (_THIS, SDL_Surface * surface)
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{
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return (-1);
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}
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static void
GGI_FreeHWSurface (_THIS, SDL_Surface * surface)
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{
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return;
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}
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static int
GGI_LockHWSurface (_THIS, SDL_Surface * surface)
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{
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return (0);
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}
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static void
GGI_UnlockHWSurface (_THIS, SDL_Surface * surface)
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{
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return;
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}
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static void
GGI_DirectUpdate (_THIS, int numrects, SDL_Rect * rects)
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{
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int i;
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/* ggiFlush(VIS); */
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for (i = 0; i < numrects; i++) {
ggiFlushRegion (VIS, rects[i].x, rects[i].y, rects[i].w, rects[i].h);
}
return;
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}
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int
GGI_SetColors (_THIS, int firstcolor, int ncolors, SDL_Color * colors)
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{
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int i;
ggi_color pal[256];
/* Set up the colormap */
for (i = 0; i < ncolors; i++) {
pal[i].r = (colors[i].r << 8) | colors[i].r;
pal[i].g = (colors[i].g << 8) | colors[i].g;
pal[i].b = (colors[i].b << 8) | colors[i].b;
}
ggiSetPalette (VIS, firstcolor, ncolors, pal);
return 1;
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}
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void
GGI_VideoQuit (_THIS)
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{
}
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void
GGI_FinalQuit (void)
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{
}
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/* vi: set ts=4 sw=4 expandtab: */