This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_ggivideo.c
400 lines (332 loc) · 10.1 KB
1
/*
2
3
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
4
5
6
7
8
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.
9
10
11
12
13
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.
14
15
16
17
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
18
19
20
Sam Lantinga
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
26
27
28
29
30
31
32
33
34
35
/* 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"
36
37
38
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
39
40
41
42
43
44
45
#include "SDL_ggivideo.h"
#include "SDL_ggimouse_c.h"
#include "SDL_ggievents_c.h"
struct private_hwdata
{
46
ggi_visual_t vis;
47
48
49
50
51
};
ggi_visual_t VIS;
/* Initialization/Query functions */
52
53
54
55
56
57
58
59
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);
60
61
/* Hardware surface functions */
62
63
64
65
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);
66
67
68
/* GGI driver bootstrap functions */
69
static int
70
GGI_Available(void)
71
{
72
73
74
ggi_visual_t *vis;
vis = NULL;
75
76
if (ggiInit() == 0) {
vis = ggiOpen(NULL);
77
if (vis != NULL) {
78
ggiClose(vis);
79
80
81
}
}
return (vis != NULL);
82
83
}
84
static void
85
GGI_DeleteDevice(SDL_VideoDevice * device)
86
{
87
88
SDL_free(device->hidden);
SDL_free(device);
89
90
}
91
static SDL_VideoDevice *
92
GGI_CreateDevice(int devindex)
93
{
94
95
96
SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
97
device = (SDL_VideoDevice *) SDL_malloc(sizeof(SDL_VideoDevice));
98
if (device) {
99
SDL_memset(device, 0, (sizeof *device));
100
device->hidden = (struct SDL_PrivateVideoData *)
101
SDL_malloc((sizeof *device->hidden));
102
103
}
if ((device == NULL) || (device->hidden == NULL)) {
104
SDL_OutOfMemory();
105
if (device) {
106
SDL_free(device);
107
108
109
}
return (0);
}
110
SDL_memset(device->hidden, 0, (sizeof *device->hidden));
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/* 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;
139
140
141
}
VideoBootStrap GGI_bootstrap = {
142
143
"ggi", "General Graphics Interface (GGI)",
GGI_Available, GGI_CreateDevice
144
145
146
147
148
149
};
static SDL_Rect video_mode;
static SDL_Rect *SDL_modelist[4] = { NULL, NULL, NULL, NULL };
150
int
151
GGI_VideoInit(_THIS, SDL_PixelFormat * vformat)
152
{
153
154
155
156
157
158
159
160
161
162
163
164
165
166
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;
167
priv = SDL_malloc(sizeof(struct private_hwdata));
168
if (priv == NULL) {
169
170
SDL_SetError("Unhandled GGI mode type!\n");
GGI_VideoQuit(NULL);
171
172
}
173
174
175
if (ggiInit() != 0) {
SDL_SetError("Unable to initialize GGI!\n");
GGI_VideoQuit(NULL);
176
177
}
178
VIS = ggiOpen(NULL);
179
if (VIS == NULL) {
180
181
182
SDL_SetError("Unable to open default GGI visual!\n");
ggiExit();
GGI_VideoQuit(NULL);
183
184
}
185
ggiSetFlags(VIS, GGIFLAG_ASYNC);
186
187
/* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */
188
ggiCheckMode(VIS, &mode);
189
190
/* At this point we should have a valid mode - try to set it */
191
err = ggiSetMode(VIS, &mode);
192
193
194
/* If we couldn't set _any_ modes, something is very wrong */
if (err) {
195
196
197
198
SDL_SetError("Can't set a mode!\n");
ggiClose(VIS);
ggiExit();
GGI_VideoQuit(NULL);
199
200
201
202
203
204
205
}
/* 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 */
206
207
208
if (GT_SCHEME(mode.graphtype) == GT_PALETTE) {
ggiSetColorfulPalette(VIS);
ggiGetPalette(VIS, 0, 1 << vformat->BitsPerPixel, pal);
209
210
211
212
213
}
/* Now we try to get the DirectBuffer info, which determines whether
* SDL can access hardware surfaces directly. */
214
num_bufs = ggiDBGetNumBuffers(VIS);
215
216
if (num_bufs > 0) {
217
db = ggiDBGetBuffer(VIS, 0); /* Only handle one DB for now */
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
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);
240
241
}
242
static SDL_Rect **
243
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
251
SDL_Surface *
252
253
GGI_SetVideoMode(_THIS, SDL_Surface * current, int width, int height,
int bpp, Uint32 flags)
254
{
255
256
257
258
259
260
261
262
263
264
265
266
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;
267
fprintf(stderr, "GGI_SetVideoMode()\n");
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
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:
299
SDL_SetError("Unknown SDL bit depth, using GT_AUTO....\n");
300
301
302
303
mode.graphtype = GT_AUTO;
}
/* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */
304
ggiCheckMode(VIS, &mode);
305
306
/* At this point we should have a valid mode - try to set it */
307
err = ggiSetMode(VIS, &mode);
308
309
310
/* If we couldn't set _any_ modes, something is very wrong */
if (err) {
311
312
313
314
SDL_SetError("Can't set a mode!\n");
ggiClose(VIS);
ggiExit();
GGI_VideoQuit(NULL);
315
316
317
}
/* Set a palette for palletized modes */
318
319
320
if (GT_SCHEME(mode.graphtype) == GT_PALETTE) {
ggiSetColorfulPalette(VIS);
ggiGetPalette(VIS, 0, 1 << bpp, pal);
321
322
}
323
db = ggiDBGetBuffer(VIS, 0);
324
325
326
327
328
329
330
331
332
333
334
335
336
/* 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);
337
338
}
339
static int
340
GGI_AllocHWSurface(_THIS, SDL_Surface * surface)
341
{
342
return (-1);
343
}
344
static void
345
GGI_FreeHWSurface(_THIS, SDL_Surface * surface)
346
{
347
return;
348
}
349
static int
350
GGI_LockHWSurface(_THIS, SDL_Surface * surface)
351
{
352
return (0);
353
}
354
static void
355
GGI_UnlockHWSurface(_THIS, SDL_Surface * surface)
356
{
357
return;
358
359
}
360
static void
361
GGI_DirectUpdate(_THIS, int numrects, SDL_Rect * rects)
362
{
363
364
int i;
365
/* ggiFlush(VIS); */
366
367
for (i = 0; i < numrects; i++) {
368
ggiFlushRegion(VIS, rects[i].x, rects[i].y, rects[i].w, rects[i].h);
369
370
}
return;
371
372
}
373
int
374
GGI_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color * colors)
375
{
376
377
378
379
380
381
382
383
384
385
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;
}
386
ggiSetPalette(VIS, firstcolor, ncolors, pal);
387
388
return 1;
389
}
390
391
void
392
GGI_VideoQuit(_THIS)
393
394
{
}
395
void
396
GGI_FinalQuit(void)
397
398
{
}
399
400
/* vi: set ts=4 sw=4 expandtab: */