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comparison src/video/aalib/SDL_aavideo.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children e8157fcb3114
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1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* AAlib based SDL video driver implementation.
29 */
30
31 #include <stdlib.h>
32 #include <stdio.h>
33 #include <unistd.h>
34 #include <sys/stat.h>
35
36
37 #include "SDL.h"
38 #include "SDL_error.h"
39 #include "SDL_video.h"
40 #include "SDL_mouse.h"
41 #include "SDL_sysvideo.h"
42 #include "SDL_pixels_c.h"
43 #include "SDL_events_c.h"
44
45 #include "SDL_aavideo.h"
46 #include "SDL_aaevents_c.h"
47 #include "SDL_aamouse_c.h"
48
49 #include <aalib.h>
50
51 /* Initialization/Query functions */
52 static int AA_VideoInit(_THIS, SDL_PixelFormat *vformat);
53 static SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
54 static SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
55 static int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
56 static void AA_VideoQuit(_THIS);
57
58 /* Hardware surface functions */
59 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface);
60 static int AA_LockHWSurface(_THIS, SDL_Surface *surface);
61 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface);
62 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface);
63 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface);
64
65 /* Cache the VideoDevice struct */
66 static struct SDL_VideoDevice *local_this;
67
68 /* AAlib driver bootstrap functions */
69
70 static int AA_Available(void)
71 {
72 return 1; /* Always available ! */
73 }
74
75 static void AA_DeleteDevice(SDL_VideoDevice *device)
76 {
77 free(device->hidden);
78 free(device);
79 }
80
81 static SDL_VideoDevice *AA_CreateDevice(int devindex)
82 {
83 SDL_VideoDevice *device;
84
85 /* Initialize all variables that we clean on shutdown */
86 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
87 if ( device ) {
88 memset(device, 0, (sizeof *device));
89 device->hidden = (struct SDL_PrivateVideoData *)
90 malloc((sizeof *device->hidden));
91 }
92 if ( (device == NULL) || (device->hidden == NULL) ) {
93 SDL_OutOfMemory();
94 if ( device ) {
95 free(device);
96 }
97 return(0);
98 }
99 memset(device->hidden, 0, (sizeof *device->hidden));
100
101 /* Set the function pointers */
102 device->VideoInit = AA_VideoInit;
103 device->ListModes = AA_ListModes;
104 device->SetVideoMode = AA_SetVideoMode;
105 device->CreateYUVOverlay = NULL;
106 device->SetColors = AA_SetColors;
107 device->UpdateRects = NULL;
108 device->VideoQuit = AA_VideoQuit;
109 device->AllocHWSurface = AA_AllocHWSurface;
110 device->CheckHWBlit = NULL;
111 device->FillHWRect = NULL;
112 device->SetHWColorKey = NULL;
113 device->SetHWAlpha = NULL;
114 device->LockHWSurface = AA_LockHWSurface;
115 device->UnlockHWSurface = AA_UnlockHWSurface;
116 device->FlipHWSurface = NULL;
117 device->FreeHWSurface = AA_FreeHWSurface;
118 device->SetCaption = NULL;
119 device->SetIcon = NULL;
120 device->IconifyWindow = NULL;
121 device->GrabInput = NULL;
122 device->GetWMInfo = NULL;
123 device->InitOSKeymap = AA_InitOSKeymap;
124 device->PumpEvents = AA_PumpEvents;
125
126 device->free = AA_DeleteDevice;
127
128 return device;
129 }
130
131 VideoBootStrap AALIB_bootstrap = {
132 "aalib", "ASCII Art Library",
133 AA_Available, AA_CreateDevice
134 };
135
136 static void AA_ResizeHandler(aa_context *);
137
138 int AA_VideoInit(_THIS, SDL_PixelFormat *vformat)
139 {
140 int keyboard;
141 int i;
142
143 /* Initialize all variables that we clean on shutdown */
144 for ( i=0; i<SDL_NUMMODES; ++i ) {
145 SDL_modelist[i] = malloc(sizeof(SDL_Rect));
146 SDL_modelist[i]->x = SDL_modelist[i]->y = 0;
147 }
148 /* Modes sorted largest to smallest */
149 SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768;
150 SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600;
151 SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480;
152 SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400;
153 SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240;
154 SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200;
155 SDL_modelist[6] = NULL;
156
157 /* Initialize the library */
158
159 AA_mutex = SDL_CreateMutex();
160
161 aa_parseoptions (NULL, NULL, NULL, NULL);
162
163 AA_context = aa_autoinit(&aa_defparams);
164 if ( ! AA_context ) {
165 SDL_SetError("Unable to initialize AAlib");
166 return(-1);
167 }
168
169 /* Enable mouse and keyboard support */
170
171 if ( ! aa_autoinitkbd (AA_context, AA_SENDRELEASE) ) {
172 SDL_SetError("Unable to initialize AAlib keyboard");
173 return(-1);
174 }
175 if ( ! aa_autoinitmouse (AA_context, AA_SENDRELEASE) ) {
176 fprintf(stderr,"Warning: Unable to initialize AAlib mouse");
177 }
178 AA_rparams = aa_getrenderparams();
179
180 local_this = this;
181
182 aa_resizehandler(AA_context, AA_ResizeHandler);
183
184 fprintf(stderr,"Using AAlib driver: %s (%s)\n", AA_context->driver->name, AA_context->driver->shortname);
185
186 AA_in_x11 = (strcmp(AA_context->driver->shortname,"X11") == 0);
187 /* Determine the screen depth (use default 8-bit depth) */
188 vformat->BitsPerPixel = 8;
189 vformat->BytesPerPixel = 1;
190
191 /* We're done! */
192 return(0);
193 }
194
195 SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
196 {
197 if(format->BitsPerPixel != 8)
198 return NULL;
199
200 if ( flags & SDL_FULLSCREEN ) {
201 return SDL_modelist;
202 } else {
203 return (SDL_Rect **) -1;
204 }
205 }
206
207 /* From aavga.c
208 AAlib does not give us the choice of the actual resolution, thus we have to simulate additional
209 resolution by scaling down manually each frame
210 */
211 static void fastscale (register char *b1, register char *b2, int x1, int x2, int y1, int y2)
212 {
213 register int ex, spx = 0, ddx, ddx1;
214 int ddy1, ddy, spy = 0, ey;
215 int x;
216 char *bb1 = b1;
217 if (!x1 || !x2 || !y1 || !y2)
218 return;
219 ddx = x1 + x1;
220 ddx1 = x2 + x2;
221 if (ddx1 < ddx)
222 spx = ddx / ddx1, ddx %= ddx1;
223 ddy = y1 + y1;
224 ddy1 = y2 + y2;
225 if (ddy1 < ddy)
226 spy = (ddy / ddy1) * x1, ddy %= ddy1;
227 ey = -ddy1;
228 for (; y2; y2--) {
229 ex = -ddx1;
230 for (x = x2; x; x--) {
231 *b2 = *b1;
232 b2++;
233 b1 += spx;
234 ex += ddx;
235 if (ex > 0) {
236 b1++;
237 ex -= ddx1;
238 }
239 }
240 bb1 += spy;
241 ey += ddy;
242 if (ey > 0) {
243 bb1 += x1;
244 ey -= ddy1;
245 }
246 b1 = bb1;
247 }
248 }
249
250 /* Various screen update functions available */
251 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
252
253 SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current,
254 int width, int height, int bpp, Uint32 flags)
255 {
256 int mode;
257
258 if ( AA_buffer ) {
259 free( AA_buffer );
260 }
261
262 AA_buffer = malloc(width * height);
263 if ( ! AA_buffer ) {
264 SDL_SetError("Couldn't allocate buffer for requested mode");
265 return(NULL);
266 }
267
268 /* printf("Setting mode %dx%d\n", width, height); */
269
270 memset(aa_image(AA_context), 0, aa_imgwidth(AA_context) * aa_imgheight(AA_context));
271 memset(AA_buffer, 0, width * height);
272
273 /* Allocate the new pixel format for the screen */
274 if ( ! SDL_ReallocFormat(current, 8, 0, 0, 0, 0) ) {
275 return(NULL);
276 }
277
278 /* Set up the new mode framebuffer */
279 current->flags = SDL_FULLSCREEN;
280 AA_w = current->w = width;
281 AA_h = current->h = height;
282 current->pitch = current->w;
283 current->pixels = AA_buffer;
284
285 AA_x_ratio = ((double)aa_imgwidth(AA_context)) / ((double)width);
286 AA_y_ratio = ((double)aa_imgheight(AA_context)) / ((double)height);
287
288 /* Set the blit function */
289 this->UpdateRects = AA_DirectUpdate;
290
291 /* We're done */
292 return(current);
293 }
294
295 static void AA_ResizeHandler(aa_context *context)
296 {
297 aa_resize(context);
298 local_this->hidden->x_ratio = ((double)aa_imgwidth(context)) / ((double)local_this->screen->w);
299 local_this->hidden->y_ratio = ((double)aa_imgheight(context)) / ((double)local_this->screen->h);
300
301 fastscale (local_this->hidden->buffer, aa_image(context), local_this->hidden->w, aa_imgwidth (context), local_this->hidden->h, aa_imgheight (context));
302 aa_renderpalette(context, local_this->hidden->palette, local_this->hidden->rparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
303 aa_flush(context);
304 }
305
306 /* We don't actually allow hardware surfaces other than the main one */
307 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface)
308 {
309 return(-1);
310 }
311 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface)
312 {
313 return;
314 }
315
316 /* We need to wait for vertical retrace on page flipped displays */
317 static int AA_LockHWSurface(_THIS, SDL_Surface *surface)
318 {
319 /* TODO ? */
320 return(0);
321 }
322 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface)
323 {
324 return;
325 }
326
327 /* FIXME: How is this done with AAlib? */
328 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface)
329 {
330 SDL_mutexP(AA_mutex);
331 aa_flush(AA_context);
332 SDL_mutexV(AA_mutex);
333 return(0);
334 }
335
336 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
337 {
338 int i;
339 SDL_Rect *rect;
340
341 fastscale (AA_buffer, aa_image(AA_context), AA_w, aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context));
342 #if 1
343 aa_renderpalette(AA_context, AA_palette, AA_rparams, 0, 0, aa_scrwidth(AA_context), aa_scrheight(AA_context));
344 #else
345 /* Render only the rectangles in the list */
346 printf("Update rects : ");
347 for ( i=0; i < numrects; ++i ) {
348 rect = &rects[i];
349 printf("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h);
350 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);
351 }
352 printf("\n");
353 #endif
354 SDL_mutexP(AA_mutex);
355 aa_flush(AA_context);
356 SDL_mutexV(AA_mutex);
357 return;
358 }
359
360 int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
361 {
362 int i;
363
364 for ( i=0; i < ncolors; i++ ) {
365 aa_setpalette(AA_palette, firstcolor + i,
366 colors[i].r>>2,
367 colors[i].g>>2,
368 colors[i].b>>2);
369 }
370 return(1);
371 }
372
373 /* Note: If we are terminated, this could be called in the middle of
374 another SDL video routine -- notably UpdateRects.
375 */
376 void AA_VideoQuit(_THIS)
377 {
378 int i;
379
380 aa_uninitkbd(AA_context);
381 aa_uninitmouse(AA_context);
382
383 /* Free video mode lists */
384 for ( i=0; i<SDL_NUMMODES; ++i ) {
385 if ( SDL_modelist[i] != NULL ) {
386 free(SDL_modelist[i]);
387 SDL_modelist[i] = NULL;
388 }
389 }
390
391 aa_close(AA_context);
392
393 SDL_DestroyMutex(AA_mutex);
394
395 this->screen->pixels = NULL;
396 }