1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 /* GGI-based SDL video driver implementation.
25 */
26
27 #include <fcntl.h>
28 #include <unistd.h>
29 #include <sys/mman.h>
30
31 #include <ggi/ggi.h>
32 #include <ggi/gii.h>
33
34 #include "SDL_video.h"
35 #include "SDL_mouse.h"
36 #include "../SDL_sysvideo.h"
37 #include "../SDL_pixels_c.h"
38 #include "../../events/SDL_events_c.h"
39 #include "SDL_ggivideo.h"
40 #include "SDL_ggimouse_c.h"
41 #include "SDL_ggievents_c.h"
42
43
44 struct private_hwdata
45 {
46 ggi_visual_t vis;
47 };
48
49 ggi_visual_t VIS;
50
51 /* Initialization/Query functions */
52 static int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat);
53 static SDL_Rect **GGI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
54 static SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
55 static int GGI_SetColors(_THIS, int firstcolor, int ncolors,
56 SDL_Color *colors);
57 static void GGI_VideoQuit(_THIS);
58
59 /* Hardware surface functions */
60 static int GGI_AllocHWSurface(_THIS, SDL_Surface *surface);
61 static int GGI_LockHWSurface(_THIS, SDL_Surface *surface);
62 static void GGI_UnlockHWSurface(_THIS, SDL_Surface *surface);
63 static void GGI_FreeHWSurface(_THIS, SDL_Surface *surface);
64
65 /* GGI driver bootstrap functions */
66
GGI_Available(void)67 static int GGI_Available(void)
68 {
69 ggi_visual_t *vis;
70
71 vis = NULL;
72 if (ggiInit() == 0) {
73 vis = ggiOpen(NULL);
74 if (vis != NULL) {
75 ggiClose(vis);
76 }
77 }
78 return (vis != NULL);
79 }
80
GGI_DeleteDevice(SDL_VideoDevice * device)81 static void GGI_DeleteDevice(SDL_VideoDevice *device)
82 {
83 SDL_free(device->hidden);
84 SDL_free(device);
85 }
86
GGI_CreateDevice(int devindex)87 static SDL_VideoDevice *GGI_CreateDevice(int devindex)
88 {
89 SDL_VideoDevice *device;
90
91 /* Initialize all variables that we clean on shutdown */
92 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
93 if ( device ) {
94 SDL_memset(device, 0, (sizeof *device));
95 device->hidden = (struct SDL_PrivateVideoData *)
96 SDL_malloc((sizeof *device->hidden));
97 }
98 if ( (device == NULL) || (device->hidden == NULL) ) {
99 SDL_OutOfMemory();
100 if ( device ) {
101 SDL_free(device);
102 }
103 return(0);
104 }
105 SDL_memset(device->hidden, 0, (sizeof *device->hidden));
106
107 /* Set the function pointers */
108 device->VideoInit = GGI_VideoInit;
109 device->ListModes = GGI_ListModes;
110 device->SetVideoMode = GGI_SetVideoMode;
111 device->SetColors = GGI_SetColors;
112 device->UpdateRects = NULL;
113 device->VideoQuit = GGI_VideoQuit;
114 device->AllocHWSurface = GGI_AllocHWSurface;
115 device->CheckHWBlit = NULL;
116 device->FillHWRect = NULL;
117 device->SetHWColorKey = NULL;
118 device->SetHWAlpha = NULL;
119 device->LockHWSurface = GGI_LockHWSurface;
120 device->UnlockHWSurface = GGI_UnlockHWSurface;
121 device->FlipHWSurface = NULL;
122 device->FreeHWSurface = GGI_FreeHWSurface;
123 device->SetCaption = NULL;
124 device->SetIcon = NULL;
125 device->IconifyWindow = NULL;
126 device->GrabInput = NULL;
127 device->GetWMInfo = NULL;
128 device->InitOSKeymap = GGI_InitOSKeymap;
129 device->PumpEvents = GGI_PumpEvents;
130
131 device->free = GGI_DeleteDevice;
132
133 return device;
134 }
135
136 VideoBootStrap GGI_bootstrap = {
137 "ggi", "General Graphics Interface (GGI)",
138 GGI_Available, GGI_CreateDevice
139 };
140
141
142 static SDL_Rect video_mode;
143 static SDL_Rect *SDL_modelist[4] = { NULL, NULL, NULL, NULL };
144
GGI_VideoInit(_THIS,SDL_PixelFormat * vformat)145 int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat)
146 {
147 ggi_mode mode =
148 {
149 1,
150 { GGI_AUTO, GGI_AUTO },
151 { GGI_AUTO, GGI_AUTO },
152 { 0, 0 },
153 GT_AUTO,
154 { GGI_AUTO, GGI_AUTO }
155 };
156 struct private_hwdata *priv;
157 ggi_color pal[256], map[256];
158 const ggi_directbuffer *db;
159 int err, num_bufs;
160 ggi_pixel white, black;
161
162 priv = SDL_malloc(sizeof(struct private_hwdata));
163 if (priv == NULL)
164 {
165 SDL_SetError("Unhandled GGI mode type!\n");
166 GGI_VideoQuit(NULL);
167 }
168
169 if (ggiInit() != 0)
170 {
171 SDL_SetError("Unable to initialize GGI!\n");
172 GGI_VideoQuit(NULL);
173 }
174
175 VIS = ggiOpen(NULL);
176 if (VIS == NULL)
177 {
178 SDL_SetError("Unable to open default GGI visual!\n");
179 ggiExit();
180 GGI_VideoQuit(NULL);
181 }
182
183 ggiSetFlags(VIS, GGIFLAG_ASYNC);
184
185 /* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */
186 ggiCheckMode(VIS, &mode);
187
188 /* At this point we should have a valid mode - try to set it */
189 err = ggiSetMode(VIS, &mode);
190
191 /* If we couldn't set _any_ modes, something is very wrong */
192 if (err)
193 {
194 SDL_SetError("Can't set a mode!\n");
195 ggiClose(VIS);
196 ggiExit();
197 GGI_VideoQuit(NULL);
198 }
199
200 /* Determine the current screen size */
201 this->info.current_w = mode.virt.x;
202 this->info.current_h = mode.virt.y;
203
204 /* Set a palette for palletized modes */
205 if (GT_SCHEME(mode.graphtype) == GT_PALETTE)
206 {
207 ggiSetColorfulPalette(VIS);
208 ggiGetPalette(VIS, 0, 1 << vformat->BitsPerPixel, pal);
209 }
210
211 /* Now we try to get the DirectBuffer info, which determines whether
212 * SDL can access hardware surfaces directly. */
213
214 num_bufs = ggiDBGetNumBuffers(VIS);
215
216 if (num_bufs > 0)
217 {
218 db = ggiDBGetBuffer(VIS, 0); /* Only handle one DB for now */
219
220 vformat->BitsPerPixel = db->buffer.plb.pixelformat->depth;
221
222 vformat->Rmask = db->buffer.plb.pixelformat->red_mask;
223 vformat->Gmask = db->buffer.plb.pixelformat->green_mask;
224 vformat->Bmask = db->buffer.plb.pixelformat->blue_mask;
225
226 /* Fill in our hardware acceleration capabilities */
227
228 this->info.wm_available = 0;
229 this->info.hw_available = 1;
230 this->info.video_mem = db->buffer.plb.stride * mode.virt.y;
231 }
232
233 video_mode.x = 0;
234 video_mode.y = 0;
235 video_mode.w = mode.virt.x;
236 video_mode.h = mode.virt.y;
237 SDL_modelist[((vformat->BitsPerPixel + 7) / 8) - 1] = &video_mode;
238
239 /* We're done! */
240 return(0);
241 }
242
GGI_ListModes(_THIS,SDL_PixelFormat * format,Uint32 flags)243 static SDL_Rect **GGI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
244 {
245 return(&SDL_modelist[((format->BitsPerPixel + 7) / 8) - 1]);
246 }
247
248 /* Various screen update functions available */
249 static void GGI_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
250
GGI_SetVideoMode(_THIS,SDL_Surface * current,int width,int height,int bpp,Uint32 flags)251 SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags)
252 {
253 ggi_mode mode =
254 {
255 1,
256 { GGI_AUTO, GGI_AUTO },
257 { GGI_AUTO, GGI_AUTO },
258 { 0, 0 },
259 GT_AUTO,
260 { GGI_AUTO, GGI_AUTO }
261 };
262 const ggi_directbuffer *db;
263 ggi_color pal[256];
264 int err;
265
266 fprintf(stderr, "GGI_SetVideoMode()\n");
267
268 mode.visible.x = mode.virt.x = width;
269 mode.visible.y = mode.virt.y = height;
270
271 /* Translate requested SDL bit depth into a GGI mode */
272 switch (bpp)
273 {
274 case 1: mode.graphtype = GT_1BIT; break;
275 case 2: mode.graphtype = GT_2BIT; break;
276 case 4: mode.graphtype = GT_4BIT; break;
277 case 8: mode.graphtype = GT_8BIT; break;
278 case 15: mode.graphtype = GT_15BIT; break;
279 case 16: mode.graphtype = GT_16BIT; break;
280 case 24: mode.graphtype = GT_24BIT; break;
281 case 32: mode.graphtype = GT_32BIT; break;
282 default:
283 SDL_SetError("Unknown SDL bit depth, using GT_AUTO....\n");
284 mode.graphtype = GT_AUTO;
285 }
286
287 /* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */
288 ggiCheckMode(VIS, &mode);
289
290 /* At this point we should have a valid mode - try to set it */
291 err = ggiSetMode(VIS, &mode);
292
293 /* If we couldn't set _any_ modes, something is very wrong */
294 if (err)
295 {
296 SDL_SetError("Can't set a mode!\n");
297 ggiClose(VIS);
298 ggiExit();
299 GGI_VideoQuit(NULL);
300 }
301
302 /* Set a palette for palletized modes */
303 if (GT_SCHEME(mode.graphtype) == GT_PALETTE)
304 {
305 ggiSetColorfulPalette(VIS);
306 ggiGetPalette(VIS, 0, 1 << bpp, pal);
307 }
308
309 db = ggiDBGetBuffer(VIS, 0);
310
311 /* Set up the new mode framebuffer */
312 current->flags = (SDL_FULLSCREEN | SDL_HWSURFACE);
313 current->w = mode.virt.x;
314 current->h = mode.virt.y;
315 current->pitch = db->buffer.plb.stride;
316 current->pixels = db->read;
317
318 /* Set the blit function */
319 this->UpdateRects = GGI_DirectUpdate;
320
321 /* We're done */
322 return(current);
323 }
324
GGI_AllocHWSurface(_THIS,SDL_Surface * surface)325 static int GGI_AllocHWSurface(_THIS, SDL_Surface *surface)
326 {
327 return(-1);
328 }
GGI_FreeHWSurface(_THIS,SDL_Surface * surface)329 static void GGI_FreeHWSurface(_THIS, SDL_Surface *surface)
330 {
331 return;
332 }
GGI_LockHWSurface(_THIS,SDL_Surface * surface)333 static int GGI_LockHWSurface(_THIS, SDL_Surface *surface)
334 {
335 return(0);
336 }
GGI_UnlockHWSurface(_THIS,SDL_Surface * surface)337 static void GGI_UnlockHWSurface(_THIS, SDL_Surface *surface)
338 {
339 return;
340 }
341
GGI_DirectUpdate(_THIS,int numrects,SDL_Rect * rects)342 static void GGI_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
343 {
344 int i;
345
346 /* ggiFlush(VIS); */
347
348 for (i = 0; i < numrects; i++)
349 {
350 ggiFlushRegion(VIS, rects[i].x, rects[i].y, rects[i].w, rects[i].h);
351 }
352 return;
353 }
354
GGI_SetColors(_THIS,int firstcolor,int ncolors,SDL_Color * colors)355 int GGI_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
356 {
357 int i;
358 ggi_color pal[256];
359
360 /* Set up the colormap */
361 for (i = 0; i < ncolors; i++)
362 {
363 pal[i].r = (colors[i].r << 8) | colors[i].r;
364 pal[i].g = (colors[i].g << 8) | colors[i].g;
365 pal[i].b = (colors[i].b << 8) | colors[i].b;
366 }
367
368 ggiSetPalette(VIS, firstcolor, ncolors, pal);
369
370 return 1;
371 }
372
GGI_VideoQuit(_THIS)373 void GGI_VideoQuit(_THIS)
374 {
375 }
GGI_FinalQuit(void)376 void GGI_FinalQuit(void)
377 {
378 }
379