e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | /* AAlib based SDL video driver implementation. |
25 | */ |
26 | |
27 | #include <unistd.h> |
28 | #include <sys/stat.h> |
29 | |
30 | |
31 | #include "SDL_video.h" |
32 | #include "SDL_mouse.h" |
33 | #include "../SDL_sysvideo.h" |
34 | #include "../SDL_pixels_c.h" |
35 | #include "../../events/SDL_events_c.h" |
36 | |
37 | #include "SDL_aavideo.h" |
38 | #include "SDL_aaevents_c.h" |
39 | #include "SDL_aamouse_c.h" |
40 | |
41 | #include <aalib.h> |
42 | |
43 | /* Initialization/Query functions */ |
44 | static int AA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
45 | static SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
46 | static SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
47 | static int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors); |
48 | static void AA_VideoQuit(_THIS); |
49 | |
50 | /* Hardware surface functions */ |
51 | static int AA_AllocHWSurface(_THIS, SDL_Surface *surface); |
52 | static int AA_LockHWSurface(_THIS, SDL_Surface *surface); |
53 | static int AA_FlipHWSurface(_THIS, SDL_Surface *surface); |
54 | static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
55 | static void AA_FreeHWSurface(_THIS, SDL_Surface *surface); |
56 | |
57 | /* Cache the VideoDevice struct */ |
58 | static struct SDL_VideoDevice *local_this; |
59 | |
60 | /* AAlib driver bootstrap functions */ |
61 | |
62 | static int AA_Available(void) |
63 | { |
64 | return 1; /* Always available ! */ |
65 | } |
66 | |
67 | static void AA_DeleteDevice(SDL_VideoDevice *device) |
68 | { |
69 | SDL_free(device->hidden); |
70 | SDL_free(device); |
71 | } |
72 | |
73 | static SDL_VideoDevice *AA_CreateDevice(int devindex) |
74 | { |
75 | SDL_VideoDevice *device; |
76 | |
77 | /* Initialize all variables that we clean on shutdown */ |
78 | device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
79 | if ( device ) { |
80 | SDL_memset(device, 0, (sizeof *device)); |
81 | device->hidden = (struct SDL_PrivateVideoData *) |
82 | SDL_malloc((sizeof *device->hidden)); |
83 | } |
84 | if ( (device == NULL) || (device->hidden == NULL) ) { |
85 | SDL_OutOfMemory(); |
86 | if ( device ) { |
87 | SDL_free(device); |
88 | } |
89 | return(0); |
90 | } |
91 | SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
92 | |
93 | /* Set the function pointers */ |
94 | device->VideoInit = AA_VideoInit; |
95 | device->ListModes = AA_ListModes; |
96 | device->SetVideoMode = AA_SetVideoMode; |
97 | device->CreateYUVOverlay = NULL; |
98 | device->SetColors = AA_SetColors; |
99 | device->UpdateRects = NULL; |
100 | device->VideoQuit = AA_VideoQuit; |
101 | device->AllocHWSurface = AA_AllocHWSurface; |
102 | device->CheckHWBlit = NULL; |
103 | device->FillHWRect = NULL; |
104 | device->SetHWColorKey = NULL; |
105 | device->SetHWAlpha = NULL; |
106 | device->LockHWSurface = AA_LockHWSurface; |
107 | device->UnlockHWSurface = AA_UnlockHWSurface; |
108 | device->FlipHWSurface = NULL; |
109 | device->FreeHWSurface = AA_FreeHWSurface; |
110 | device->SetCaption = NULL; |
111 | device->SetIcon = NULL; |
112 | device->IconifyWindow = NULL; |
113 | device->GrabInput = NULL; |
114 | device->GetWMInfo = NULL; |
115 | device->InitOSKeymap = AA_InitOSKeymap; |
116 | device->PumpEvents = AA_PumpEvents; |
117 | |
118 | device->free = AA_DeleteDevice; |
119 | |
120 | return device; |
121 | } |
122 | |
123 | VideoBootStrap AALIB_bootstrap = { |
124 | "aalib", "ASCII Art Library", |
125 | AA_Available, AA_CreateDevice |
126 | }; |
127 | |
128 | static void AA_ResizeHandler(aa_context *); |
129 | |
130 | int AA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
131 | { |
132 | int keyboard; |
133 | int i; |
134 | |
135 | /* Initialize all variables that we clean on shutdown */ |
136 | for ( i=0; i<SDL_NUMMODES; ++i ) { |
137 | SDL_modelist[i] = SDL_malloc(sizeof(SDL_Rect)); |
138 | SDL_modelist[i]->x = SDL_modelist[i]->y = 0; |
139 | } |
140 | /* Modes sorted largest to smallest */ |
141 | SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768; |
142 | SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600; |
143 | SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480; |
144 | SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400; |
145 | SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240; |
146 | SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200; |
147 | SDL_modelist[6] = NULL; |
148 | |
149 | /* Initialize the library */ |
150 | |
151 | AA_mutex = SDL_CreateMutex(); |
152 | |
153 | aa_parseoptions (NULL, NULL, NULL, NULL); |
154 | |
155 | AA_context = aa_autoinit(&aa_defparams); |
156 | if ( ! AA_context ) { |
157 | SDL_SetError("Unable to initialize AAlib"); |
158 | return(-1); |
159 | } |
160 | |
161 | /* Enable mouse and keyboard support */ |
162 | |
163 | if ( ! aa_autoinitkbd (AA_context, AA_SENDRELEASE) ) { |
164 | SDL_SetError("Unable to initialize AAlib keyboard"); |
165 | return(-1); |
166 | } |
167 | if ( ! aa_autoinitmouse (AA_context, AA_SENDRELEASE) ) { |
168 | fprintf(stderr,"Warning: Unable to initialize AAlib mouse"); |
169 | } |
170 | AA_rparams = aa_getrenderparams(); |
171 | |
172 | local_this = this; |
173 | |
174 | aa_resizehandler(AA_context, AA_ResizeHandler); |
175 | |
176 | fprintf(stderr,"Using AAlib driver: %s (%s)\n", AA_context->driver->name, AA_context->driver->shortname); |
177 | |
178 | AA_in_x11 = (SDL_strcmp(AA_context->driver->shortname,"X11") == 0); |
179 | /* Determine the screen depth (use default 8-bit depth) */ |
180 | vformat->BitsPerPixel = 8; |
181 | vformat->BytesPerPixel = 1; |
182 | |
183 | /* We're done! */ |
184 | return(0); |
185 | } |
186 | |
187 | SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
188 | { |
189 | if(format->BitsPerPixel != 8) |
190 | return NULL; |
191 | |
192 | if ( flags & SDL_FULLSCREEN ) { |
193 | return SDL_modelist; |
194 | } else { |
195 | return (SDL_Rect **) -1; |
196 | } |
197 | } |
198 | |
199 | /* From aavga.c |
200 | AAlib does not give us the choice of the actual resolution, thus we have to simulate additional |
201 | resolution by scaling down manually each frame |
202 | */ |
203 | static void fastscale (register char *b1, register char *b2, int x1, int x2, int y1, int y2) |
204 | { |
205 | register int ex, spx = 0, ddx, ddx1; |
206 | int ddy1, ddy, spy = 0, ey; |
207 | int x; |
208 | char *bb1 = b1; |
209 | if (!x1 || !x2 || !y1 || !y2) |
210 | return; |
211 | ddx = x1 + x1; |
212 | ddx1 = x2 + x2; |
213 | if (ddx1 < ddx) |
214 | spx = ddx / ddx1, ddx %= ddx1; |
215 | ddy = y1 + y1; |
216 | ddy1 = y2 + y2; |
217 | if (ddy1 < ddy) |
218 | spy = (ddy / ddy1) * x1, ddy %= ddy1; |
219 | ey = -ddy1; |
220 | for (; y2; y2--) { |
221 | ex = -ddx1; |
222 | for (x = x2; x; x--) { |
223 | *b2 = *b1; |
224 | b2++; |
225 | b1 += spx; |
226 | ex += ddx; |
227 | if (ex > 0) { |
228 | b1++; |
229 | ex -= ddx1; |
230 | } |
231 | } |
232 | bb1 += spy; |
233 | ey += ddy; |
234 | if (ey > 0) { |
235 | bb1 += x1; |
236 | ey -= ddy1; |
237 | } |
238 | b1 = bb1; |
239 | } |
240 | } |
241 | |
242 | /* Various screen update functions available */ |
243 | static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
244 | |
245 | SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, |
246 | int width, int height, int bpp, Uint32 flags) |
247 | { |
248 | int mode; |
249 | |
250 | if ( AA_buffer ) { |
251 | SDL_free( AA_buffer ); |
252 | } |
253 | |
254 | AA_buffer = SDL_malloc(width * height); |
255 | if ( ! AA_buffer ) { |
256 | SDL_SetError("Couldn't allocate buffer for requested mode"); |
257 | return(NULL); |
258 | } |
259 | |
260 | /* printf("Setting mode %dx%d\n", width, height); */ |
261 | |
262 | SDL_memset(aa_image(AA_context), 0, aa_imgwidth(AA_context) * aa_imgheight(AA_context)); |
263 | SDL_memset(AA_buffer, 0, width * height); |
264 | |
265 | /* Allocate the new pixel format for the screen */ |
266 | if ( ! SDL_ReallocFormat(current, 8, 0, 0, 0, 0) ) { |
267 | return(NULL); |
268 | } |
269 | |
270 | /* Set up the new mode framebuffer */ |
271 | current->flags = SDL_FULLSCREEN; |
272 | AA_w = current->w = width; |
273 | AA_h = current->h = height; |
274 | current->pitch = current->w; |
275 | current->pixels = AA_buffer; |
276 | |
277 | AA_x_ratio = ((double)aa_imgwidth(AA_context)) / ((double)width); |
278 | AA_y_ratio = ((double)aa_imgheight(AA_context)) / ((double)height); |
279 | |
280 | /* Set the blit function */ |
281 | this->UpdateRects = AA_DirectUpdate; |
282 | |
283 | /* We're done */ |
284 | return(current); |
285 | } |
286 | |
287 | static void AA_ResizeHandler(aa_context *context) |
288 | { |
289 | aa_resize(context); |
290 | local_this->hidden->x_ratio = ((double)aa_imgwidth(context)) / ((double)local_this->screen->w); |
291 | local_this->hidden->y_ratio = ((double)aa_imgheight(context)) / ((double)local_this->screen->h); |
292 | |
293 | fastscale (local_this->hidden->buffer, aa_image(context), local_this->hidden->w, aa_imgwidth (context), local_this->hidden->h, aa_imgheight (context)); |
294 | aa_renderpalette(context, local_this->hidden->palette, local_this->hidden->rparams, 0, 0, aa_scrwidth(context), aa_scrheight(context)); |
295 | aa_flush(context); |
296 | } |
297 | |
298 | /* We don't actually allow hardware surfaces other than the main one */ |
299 | static int AA_AllocHWSurface(_THIS, SDL_Surface *surface) |
300 | { |
301 | return(-1); |
302 | } |
303 | static void AA_FreeHWSurface(_THIS, SDL_Surface *surface) |
304 | { |
305 | return; |
306 | } |
307 | |
308 | /* We need to wait for vertical retrace on page flipped displays */ |
309 | static int AA_LockHWSurface(_THIS, SDL_Surface *surface) |
310 | { |
311 | /* TODO ? */ |
312 | return(0); |
313 | } |
314 | static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
315 | { |
316 | return; |
317 | } |
318 | |
319 | /* FIXME: How is this done with AAlib? */ |
320 | static int AA_FlipHWSurface(_THIS, SDL_Surface *surface) |
321 | { |
322 | SDL_mutexP(AA_mutex); |
323 | aa_flush(AA_context); |
324 | SDL_mutexV(AA_mutex); |
325 | return(0); |
326 | } |
327 | |
328 | static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
329 | { |
330 | int i; |
331 | SDL_Rect *rect; |
332 | |
333 | fastscale (AA_buffer, aa_image(AA_context), AA_w, aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context)); |
334 | #if 1 |
335 | aa_renderpalette(AA_context, AA_palette, AA_rparams, 0, 0, aa_scrwidth(AA_context), aa_scrheight(AA_context)); |
336 | #else |
337 | /* Render only the rectangles in the list */ |
338 | printf("Update rects : "); |
339 | for ( i=0; i < numrects; ++i ) { |
340 | rect = &rects[i]; |
341 | printf("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h); |
342 | aa_renderpalette(AA_context, AA_palette, AA_rparams, rect->x * AA_x_ratio, rect->y * AA_y_ratio, rect->w * AA_x_ratio, rect->h * AA_y_ratio); |
343 | } |
344 | printf("\n"); |
345 | #endif |
346 | SDL_mutexP(AA_mutex); |
347 | aa_flush(AA_context); |
348 | SDL_mutexV(AA_mutex); |
349 | return; |
350 | } |
351 | |
352 | int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
353 | { |
354 | int i; |
355 | |
356 | for ( i=0; i < ncolors; i++ ) { |
357 | aa_setpalette(AA_palette, firstcolor + i, |
358 | colors[i].r>>2, |
359 | colors[i].g>>2, |
360 | colors[i].b>>2); |
361 | } |
362 | return(1); |
363 | } |
364 | |
365 | /* Note: If we are terminated, this could be called in the middle of |
366 | another SDL video routine -- notably UpdateRects. |
367 | */ |
368 | void AA_VideoQuit(_THIS) |
369 | { |
370 | int i; |
371 | |
372 | aa_uninitkbd(AA_context); |
373 | aa_uninitmouse(AA_context); |
374 | |
375 | /* Free video mode lists */ |
376 | for ( i=0; i<SDL_NUMMODES; ++i ) { |
377 | if ( SDL_modelist[i] != NULL ) { |
378 | SDL_free(SDL_modelist[i]); |
379 | SDL_modelist[i] = NULL; |
380 | } |
381 | } |
382 | |
383 | aa_close(AA_context); |
384 | |
385 | SDL_DestroyMutex(AA_mutex); |
386 | |
387 | this->screen->pixels = NULL; |
388 | } |