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 | /* General cursor handling code for SDL */ |
25 | |
26 | #include "SDL_mutex.h" |
27 | #include "SDL_video.h" |
28 | #include "SDL_mouse.h" |
29 | #include "SDL_blit.h" |
30 | #include "SDL_sysvideo.h" |
31 | #include "SDL_cursor_c.h" |
32 | #include "SDL_pixels_c.h" |
33 | #include "default_cursor.h" |
34 | #include "../events/SDL_sysevents.h" |
35 | #include "../events/SDL_events_c.h" |
36 | |
37 | /* These are static for our cursor handling code */ |
38 | volatile int SDL_cursorstate = CURSOR_VISIBLE; |
39 | SDL_Cursor *SDL_cursor = NULL; |
40 | static SDL_Cursor *SDL_defcursor = NULL; |
41 | SDL_mutex *SDL_cursorlock = NULL; |
42 | |
43 | /* Public functions */ |
44 | void SDL_CursorQuit(void) |
45 | { |
46 | if ( SDL_cursor != NULL ) { |
47 | SDL_Cursor *cursor; |
48 | |
49 | SDL_cursorstate &= ~CURSOR_VISIBLE; |
50 | if ( SDL_cursor != SDL_defcursor ) { |
51 | SDL_FreeCursor(SDL_cursor); |
52 | } |
53 | SDL_cursor = NULL; |
54 | if ( SDL_defcursor != NULL ) { |
55 | cursor = SDL_defcursor; |
56 | SDL_defcursor = NULL; |
57 | SDL_FreeCursor(cursor); |
58 | } |
59 | } |
60 | if ( SDL_cursorlock != NULL ) { |
61 | SDL_DestroyMutex(SDL_cursorlock); |
62 | SDL_cursorlock = NULL; |
63 | } |
64 | } |
65 | int SDL_CursorInit(Uint32 multithreaded) |
66 | { |
67 | /* We don't have mouse focus, and the cursor isn't drawn yet */ |
68 | #ifndef IPOD |
69 | SDL_cursorstate = CURSOR_VISIBLE; |
70 | #endif |
71 | |
72 | /* Create the default cursor */ |
73 | if ( SDL_defcursor == NULL ) { |
74 | SDL_defcursor = SDL_CreateCursor(default_cdata, default_cmask, |
75 | DEFAULT_CWIDTH, DEFAULT_CHEIGHT, |
76 | DEFAULT_CHOTX, DEFAULT_CHOTY); |
77 | SDL_SetCursor(SDL_defcursor); |
78 | } |
79 | |
80 | /* Create a lock if necessary */ |
81 | if ( multithreaded ) { |
82 | SDL_cursorlock = SDL_CreateMutex(); |
83 | } |
84 | |
85 | /* That's it! */ |
86 | return(0); |
87 | } |
88 | |
89 | /* Multi-thread support for cursors */ |
90 | #ifndef SDL_LockCursor |
91 | void SDL_LockCursor(void) |
92 | { |
93 | if ( SDL_cursorlock ) { |
94 | SDL_mutexP(SDL_cursorlock); |
95 | } |
96 | } |
97 | #endif |
98 | #ifndef SDL_UnlockCursor |
99 | void SDL_UnlockCursor(void) |
100 | { |
101 | if ( SDL_cursorlock ) { |
102 | SDL_mutexV(SDL_cursorlock); |
103 | } |
104 | } |
105 | #endif |
106 | |
107 | /* Software cursor drawing support */ |
108 | SDL_Cursor * SDL_CreateCursor (Uint8 *data, Uint8 *mask, |
109 | int w, int h, int hot_x, int hot_y) |
110 | { |
111 | SDL_VideoDevice *video = current_video; |
112 | int savelen; |
113 | int i; |
114 | SDL_Cursor *cursor; |
115 | |
116 | /* Make sure the width is a multiple of 8 */ |
117 | w = ((w+7)&~7); |
118 | |
119 | /* Sanity check the hot spot */ |
120 | if ( (hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h) ) { |
121 | SDL_SetError("Cursor hot spot doesn't lie within cursor"); |
122 | return(NULL); |
123 | } |
124 | |
125 | /* Allocate memory for the cursor */ |
126 | cursor = (SDL_Cursor *)SDL_malloc(sizeof *cursor); |
127 | if ( cursor == NULL ) { |
128 | SDL_OutOfMemory(); |
129 | return(NULL); |
130 | } |
131 | savelen = (w*4)*h; |
132 | cursor->area.x = 0; |
133 | cursor->area.y = 0; |
134 | cursor->area.w = w; |
135 | cursor->area.h = h; |
136 | cursor->hot_x = hot_x; |
137 | cursor->hot_y = hot_y; |
138 | cursor->data = (Uint8 *)SDL_malloc((w/8)*h*2); |
139 | cursor->mask = cursor->data+((w/8)*h); |
140 | cursor->save[0] = (Uint8 *)SDL_malloc(savelen*2); |
141 | cursor->save[1] = cursor->save[0] + savelen; |
142 | cursor->wm_cursor = NULL; |
143 | if ( ! cursor->data || ! cursor->save[0] ) { |
144 | SDL_FreeCursor(cursor); |
145 | SDL_OutOfMemory(); |
146 | return(NULL); |
147 | } |
148 | for ( i=((w/8)*h)-1; i>=0; --i ) { |
149 | cursor->data[i] = data[i]; |
150 | cursor->mask[i] = mask[i] | data[i]; |
151 | } |
152 | SDL_memset(cursor->save[0], 0, savelen*2); |
153 | |
154 | /* If the window manager gives us a good cursor, we're done! */ |
155 | if ( video->CreateWMCursor ) { |
156 | cursor->wm_cursor = video->CreateWMCursor(video, data, mask, |
157 | w, h, hot_x, hot_y); |
158 | } else { |
159 | cursor->wm_cursor = NULL; |
160 | } |
161 | return(cursor); |
162 | } |
163 | |
164 | /* SDL_SetCursor(NULL) can be used to force the cursor redraw, |
165 | if this is desired for any reason. This is used when setting |
166 | the video mode and when the SDL window gains the mouse focus. |
167 | */ |
168 | void SDL_SetCursor (SDL_Cursor *cursor) |
169 | { |
170 | SDL_VideoDevice *video = current_video; |
171 | SDL_VideoDevice *this = current_video; |
172 | |
173 | /* Make sure that the video subsystem has been initialized */ |
174 | if ( ! video ) { |
175 | return; |
176 | } |
177 | |
178 | /* Prevent the event thread from moving the mouse */ |
179 | SDL_LockCursor(); |
180 | |
181 | /* Set the new cursor */ |
182 | if ( cursor && (cursor != SDL_cursor) ) { |
183 | /* Erase the current mouse position */ |
184 | if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { |
185 | SDL_EraseCursor(SDL_VideoSurface); |
186 | } else if ( video->MoveWMCursor ) { |
187 | /* If the video driver is moving the cursor directly, |
188 | it needs to hide the old cursor before (possibly) |
189 | showing the new one. (But don't erase NULL cursor) |
190 | */ |
191 | if ( SDL_cursor && video->ShowWMCursor ) { |
192 | video->ShowWMCursor(this, NULL); |
193 | } |
194 | } |
195 | SDL_cursor = cursor; |
196 | } |
197 | |
198 | /* Draw the new mouse cursor */ |
199 | if ( SDL_cursor && (SDL_cursorstate&CURSOR_VISIBLE) ) { |
200 | /* Use window manager cursor if possible */ |
201 | int show_wm_cursor = 0; |
202 | if ( SDL_cursor->wm_cursor && video->ShowWMCursor ) { |
203 | show_wm_cursor = video->ShowWMCursor(this, SDL_cursor->wm_cursor); |
204 | } |
205 | if ( show_wm_cursor ) { |
206 | SDL_cursorstate &= ~CURSOR_USINGSW; |
207 | } else { |
208 | SDL_cursorstate |= CURSOR_USINGSW; |
209 | if ( video->ShowWMCursor ) { |
210 | video->ShowWMCursor(this, NULL); |
211 | } |
212 | { int x, y; |
213 | SDL_GetMouseState(&x, &y); |
214 | SDL_cursor->area.x = (x - SDL_cursor->hot_x); |
215 | SDL_cursor->area.y = (y - SDL_cursor->hot_y); |
216 | } |
217 | SDL_DrawCursor(SDL_VideoSurface); |
218 | } |
219 | } else { |
220 | /* Erase window manager mouse (cursor not visible) */ |
221 | if ( SDL_cursor && (SDL_cursorstate & CURSOR_USINGSW) ) { |
222 | SDL_EraseCursor(SDL_VideoSurface); |
223 | } else { |
224 | if ( video ) { |
225 | if ( video->ShowWMCursor ) { |
226 | video->ShowWMCursor(this, NULL); |
227 | } |
228 | } |
229 | } |
230 | } |
231 | SDL_UnlockCursor(); |
232 | } |
233 | |
234 | SDL_Cursor * SDL_GetCursor (void) |
235 | { |
236 | return(SDL_cursor); |
237 | } |
238 | |
239 | void SDL_FreeCursor (SDL_Cursor *cursor) |
240 | { |
241 | if ( cursor ) { |
242 | if ( cursor == SDL_cursor ) { |
243 | SDL_SetCursor(SDL_defcursor); |
244 | } |
245 | if ( cursor != SDL_defcursor ) { |
246 | SDL_VideoDevice *video = current_video; |
247 | SDL_VideoDevice *this = current_video; |
248 | |
249 | if ( cursor->data ) { |
250 | SDL_free(cursor->data); |
251 | } |
252 | if ( cursor->save[0] ) { |
253 | SDL_free(cursor->save[0]); |
254 | } |
255 | if ( video && cursor->wm_cursor ) { |
256 | if ( video->FreeWMCursor ) { |
257 | video->FreeWMCursor(this, cursor->wm_cursor); |
258 | } |
259 | } |
260 | SDL_free(cursor); |
261 | } |
262 | } |
263 | } |
264 | |
265 | int SDL_ShowCursor (int toggle) |
266 | { |
267 | int showing; |
268 | |
269 | showing = (SDL_cursorstate & CURSOR_VISIBLE); |
270 | if ( toggle >= 0 ) { |
271 | SDL_LockCursor(); |
272 | if ( toggle ) { |
273 | SDL_cursorstate |= CURSOR_VISIBLE; |
274 | } else { |
275 | SDL_cursorstate &= ~CURSOR_VISIBLE; |
276 | } |
277 | SDL_UnlockCursor(); |
278 | if ( (SDL_cursorstate & CURSOR_VISIBLE) != showing ) { |
279 | SDL_VideoDevice *video = current_video; |
280 | SDL_VideoDevice *this = current_video; |
281 | |
282 | SDL_SetCursor(NULL); |
283 | if ( video && video->CheckMouseMode ) { |
284 | video->CheckMouseMode(this); |
285 | } |
286 | } |
287 | } else { |
288 | /* Query current state */ ; |
289 | } |
290 | return(showing ? 1 : 0); |
291 | } |
292 | |
293 | void SDL_WarpMouse (Uint16 x, Uint16 y) |
294 | { |
295 | SDL_VideoDevice *video = current_video; |
296 | SDL_VideoDevice *this = current_video; |
297 | |
298 | if ( !video || !SDL_PublicSurface ) { |
299 | SDL_SetError("A video mode must be set before warping mouse"); |
300 | return; |
301 | } |
302 | |
303 | /* If we have an offset video mode, offset the mouse coordinates */ |
304 | if (this->screen->pitch == 0) { |
305 | x += this->screen->offset / this->screen->format->BytesPerPixel; |
306 | y += this->screen->offset; |
307 | } else { |
308 | x += (this->screen->offset % this->screen->pitch) / |
309 | this->screen->format->BytesPerPixel; |
310 | y += (this->screen->offset / this->screen->pitch); |
311 | } |
312 | |
313 | /* This generates a mouse motion event */ |
314 | if ( video->WarpWMCursor ) { |
315 | video->WarpWMCursor(this, x, y); |
316 | } else { |
317 | SDL_PrivateMouseMotion(0, 0, x, y); |
318 | } |
319 | } |
320 | |
321 | void SDL_MoveCursor(int x, int y) |
322 | { |
323 | SDL_VideoDevice *video = current_video; |
324 | |
325 | /* Erase and update the current mouse position */ |
326 | if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { |
327 | /* Erase and redraw mouse cursor in new position */ |
328 | SDL_LockCursor(); |
329 | SDL_EraseCursor(SDL_VideoSurface); |
330 | SDL_cursor->area.x = (x - SDL_cursor->hot_x); |
331 | SDL_cursor->area.y = (y - SDL_cursor->hot_y); |
332 | SDL_DrawCursor(SDL_VideoSurface); |
333 | SDL_UnlockCursor(); |
334 | } else if ( video->MoveWMCursor ) { |
335 | video->MoveWMCursor(video, x, y); |
336 | } |
337 | } |
338 | |
339 | /* Keep track of the current cursor colors */ |
340 | static int palette_changed = 1; |
341 | static Uint8 pixels8[2]; |
342 | |
343 | void SDL_CursorPaletteChanged(void) |
344 | { |
345 | palette_changed = 1; |
346 | } |
347 | |
348 | void SDL_MouseRect(SDL_Rect *area) |
349 | { |
350 | int clip_diff; |
351 | |
352 | *area = SDL_cursor->area; |
353 | if ( area->x < 0 ) { |
354 | area->w += area->x; |
355 | area->x = 0; |
356 | } |
357 | if ( area->y < 0 ) { |
358 | area->h += area->y; |
359 | area->y = 0; |
360 | } |
361 | clip_diff = (area->x+area->w)-SDL_VideoSurface->w; |
362 | if ( clip_diff > 0 ) { |
363 | area->w = area->w < clip_diff ? 0 : area->w-clip_diff; |
364 | } |
365 | clip_diff = (area->y+area->h)-SDL_VideoSurface->h; |
366 | if ( clip_diff > 0 ) { |
367 | area->h = area->h < clip_diff ? 0 : area->h-clip_diff; |
368 | } |
369 | } |
370 | |
371 | static void SDL_DrawCursorFast(SDL_Surface *screen, SDL_Rect *area) |
372 | { |
373 | const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 }; |
374 | int i, w, h; |
375 | Uint8 *data, datab; |
376 | Uint8 *mask, maskb; |
377 | |
378 | data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; |
379 | mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; |
380 | switch (screen->format->BytesPerPixel) { |
381 | |
382 | case 1: { |
383 | Uint8 *dst; |
384 | int dstskip; |
385 | |
386 | if ( palette_changed ) { |
387 | pixels8[0] = (Uint8)SDL_MapRGB(screen->format, 255, 255, 255); |
388 | pixels8[1] = (Uint8)SDL_MapRGB(screen->format, 0, 0, 0); |
389 | palette_changed = 0; |
390 | } |
391 | dst = (Uint8 *)screen->pixels + |
392 | (SDL_cursor->area.y+area->y)*screen->pitch + |
393 | SDL_cursor->area.x; |
394 | dstskip = screen->pitch-area->w; |
395 | |
396 | for ( h=area->h; h; h-- ) { |
397 | for ( w=area->w/8; w; w-- ) { |
398 | maskb = *mask++; |
399 | datab = *data++; |
400 | for ( i=0; i<8; ++i ) { |
401 | if ( maskb & 0x80 ) { |
402 | *dst = pixels8[datab>>7]; |
403 | } |
404 | maskb <<= 1; |
405 | datab <<= 1; |
406 | dst++; |
407 | } |
408 | } |
409 | dst += dstskip; |
410 | } |
411 | } |
412 | break; |
413 | |
414 | case 2: { |
415 | Uint16 *dst; |
416 | int dstskip; |
417 | |
418 | dst = (Uint16 *)screen->pixels + |
419 | (SDL_cursor->area.y+area->y)*screen->pitch/2 + |
420 | SDL_cursor->area.x; |
421 | dstskip = (screen->pitch/2)-area->w; |
422 | |
423 | for ( h=area->h; h; h-- ) { |
424 | for ( w=area->w/8; w; w-- ) { |
425 | maskb = *mask++; |
426 | datab = *data++; |
427 | for ( i=0; i<8; ++i ) { |
428 | if ( maskb & 0x80 ) { |
429 | *dst = (Uint16)pixels[datab>>7]; |
430 | } |
431 | maskb <<= 1; |
432 | datab <<= 1; |
433 | dst++; |
434 | } |
435 | } |
436 | dst += dstskip; |
437 | } |
438 | } |
439 | break; |
440 | |
441 | case 3: { |
442 | Uint8 *dst; |
443 | int dstskip; |
444 | |
445 | dst = (Uint8 *)screen->pixels + |
446 | (SDL_cursor->area.y+area->y)*screen->pitch + |
447 | SDL_cursor->area.x*3; |
448 | dstskip = screen->pitch-area->w*3; |
449 | |
450 | for ( h=area->h; h; h-- ) { |
451 | for ( w=area->w/8; w; w-- ) { |
452 | maskb = *mask++; |
453 | datab = *data++; |
454 | for ( i=0; i<8; ++i ) { |
455 | if ( maskb & 0x80 ) { |
456 | SDL_memset(dst,pixels[datab>>7],3); |
457 | } |
458 | maskb <<= 1; |
459 | datab <<= 1; |
460 | dst += 3; |
461 | } |
462 | } |
463 | dst += dstskip; |
464 | } |
465 | } |
466 | break; |
467 | |
468 | case 4: { |
469 | Uint32 *dst; |
470 | int dstskip; |
471 | |
472 | dst = (Uint32 *)screen->pixels + |
473 | (SDL_cursor->area.y+area->y)*screen->pitch/4 + |
474 | SDL_cursor->area.x; |
475 | dstskip = (screen->pitch/4)-area->w; |
476 | |
477 | for ( h=area->h; h; h-- ) { |
478 | for ( w=area->w/8; w; w-- ) { |
479 | maskb = *mask++; |
480 | datab = *data++; |
481 | for ( i=0; i<8; ++i ) { |
482 | if ( maskb & 0x80 ) { |
483 | *dst = pixels[datab>>7]; |
484 | } |
485 | maskb <<= 1; |
486 | datab <<= 1; |
487 | dst++; |
488 | } |
489 | } |
490 | dst += dstskip; |
491 | } |
492 | } |
493 | break; |
494 | } |
495 | } |
496 | |
497 | static void SDL_DrawCursorSlow(SDL_Surface *screen, SDL_Rect *area) |
498 | { |
499 | const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 }; |
500 | int h; |
501 | int x, minx, maxx; |
502 | Uint8 *data, datab = 0; |
503 | Uint8 *mask, maskb = 0; |
504 | Uint8 *dst; |
505 | int dstbpp, dstskip; |
506 | |
507 | data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; |
508 | mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; |
509 | dstbpp = screen->format->BytesPerPixel; |
510 | dst = (Uint8 *)screen->pixels + |
511 | (SDL_cursor->area.y+area->y)*screen->pitch + |
512 | SDL_cursor->area.x*dstbpp; |
513 | dstskip = screen->pitch-SDL_cursor->area.w*dstbpp; |
514 | |
515 | minx = area->x; |
516 | maxx = area->x+area->w; |
517 | if ( screen->format->BytesPerPixel == 1 ) { |
518 | if ( palette_changed ) { |
519 | pixels8[0] = (Uint8)SDL_MapRGB(screen->format, 255, 255, 255); |
520 | pixels8[1] = (Uint8)SDL_MapRGB(screen->format, 0, 0, 0); |
521 | palette_changed = 0; |
522 | } |
523 | for ( h=area->h; h; h-- ) { |
524 | for ( x=0; x<SDL_cursor->area.w; ++x ) { |
525 | if ( (x%8) == 0 ) { |
526 | maskb = *mask++; |
527 | datab = *data++; |
528 | } |
529 | if ( (x >= minx) && (x < maxx) ) { |
530 | if ( maskb & 0x80 ) { |
531 | SDL_memset(dst, pixels8[datab>>7], dstbpp); |
532 | } |
533 | } |
534 | maskb <<= 1; |
535 | datab <<= 1; |
536 | dst += dstbpp; |
537 | } |
538 | dst += dstskip; |
539 | } |
540 | } else { |
541 | for ( h=area->h; h; h-- ) { |
542 | for ( x=0; x<SDL_cursor->area.w; ++x ) { |
543 | if ( (x%8) == 0 ) { |
544 | maskb = *mask++; |
545 | datab = *data++; |
546 | } |
547 | if ( (x >= minx) && (x < maxx) ) { |
548 | if ( maskb & 0x80 ) { |
549 | SDL_memset(dst, pixels[datab>>7], dstbpp); |
550 | } |
551 | } |
552 | maskb <<= 1; |
553 | datab <<= 1; |
554 | dst += dstbpp; |
555 | } |
556 | dst += dstskip; |
557 | } |
558 | } |
559 | } |
560 | |
561 | /* This handles the ugly work of converting the saved cursor background from |
562 | the pixel format of the shadow surface to that of the video surface. |
563 | This is only necessary when blitting from a shadow surface of a different |
564 | pixel format than the video surface, and using a software rendered cursor. |
565 | */ |
566 | static void SDL_ConvertCursorSave(SDL_Surface *screen, int w, int h) |
567 | { |
568 | SDL_BlitInfo info; |
569 | SDL_loblit RunBlit; |
570 | |
571 | /* Make sure we can steal the blit mapping */ |
572 | if ( screen->map->dst != SDL_VideoSurface ) { |
573 | return; |
574 | } |
575 | |
576 | /* Set up the blit information */ |
577 | info.s_pixels = SDL_cursor->save[1]; |
578 | info.s_width = w; |
579 | info.s_height = h; |
580 | info.s_skip = 0; |
581 | info.d_pixels = SDL_cursor->save[0]; |
582 | info.d_width = w; |
583 | info.d_height = h; |
584 | info.d_skip = 0; |
585 | info.aux_data = screen->map->sw_data->aux_data; |
586 | info.src = screen->format; |
587 | info.table = screen->map->table; |
588 | info.dst = SDL_VideoSurface->format; |
589 | RunBlit = screen->map->sw_data->blit; |
590 | |
591 | /* Run the actual software blit */ |
592 | RunBlit(&info); |
593 | } |
594 | |
595 | void SDL_DrawCursorNoLock(SDL_Surface *screen) |
596 | { |
597 | SDL_Rect area; |
598 | |
599 | /* Get the mouse rectangle, clipped to the screen */ |
600 | SDL_MouseRect(&area); |
601 | if ( (area.w == 0) || (area.h == 0) ) { |
602 | return; |
603 | } |
604 | |
605 | /* Copy mouse background */ |
606 | { int w, h, screenbpp; |
607 | Uint8 *src, *dst; |
608 | |
609 | /* Set up the copy pointers */ |
610 | screenbpp = screen->format->BytesPerPixel; |
611 | if ( (screen == SDL_VideoSurface) || |
612 | FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { |
613 | dst = SDL_cursor->save[0]; |
614 | } else { |
615 | dst = SDL_cursor->save[1]; |
616 | } |
617 | src = (Uint8 *)screen->pixels + area.y * screen->pitch + |
618 | area.x * screenbpp; |
619 | |
620 | /* Perform the copy */ |
621 | w = area.w*screenbpp; |
622 | h = area.h; |
623 | while ( h-- ) { |
624 | SDL_memcpy(dst, src, w); |
625 | dst += w; |
626 | src += screen->pitch; |
627 | } |
628 | } |
629 | |
630 | /* Draw the mouse cursor */ |
631 | area.x -= SDL_cursor->area.x; |
632 | area.y -= SDL_cursor->area.y; |
633 | if ( (area.x == 0) && (area.w == SDL_cursor->area.w) ) { |
634 | SDL_DrawCursorFast(screen, &area); |
635 | } else { |
636 | SDL_DrawCursorSlow(screen, &area); |
637 | } |
638 | } |
639 | |
640 | void SDL_DrawCursor(SDL_Surface *screen) |
641 | { |
642 | /* Lock the screen if necessary */ |
643 | if ( screen == NULL ) { |
644 | return; |
645 | } |
646 | if ( SDL_MUSTLOCK(screen) ) { |
647 | if ( SDL_LockSurface(screen) < 0 ) { |
648 | return; |
649 | } |
650 | } |
651 | |
652 | SDL_DrawCursorNoLock(screen); |
653 | |
654 | /* Unlock the screen and update if necessary */ |
655 | if ( SDL_MUSTLOCK(screen) ) { |
656 | SDL_UnlockSurface(screen); |
657 | } |
658 | if ( (screen == SDL_VideoSurface) && |
659 | ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { |
660 | SDL_VideoDevice *video = current_video; |
661 | SDL_VideoDevice *this = current_video; |
662 | SDL_Rect area; |
663 | |
664 | SDL_MouseRect(&area); |
665 | |
666 | /* This can be called before a video mode is set */ |
667 | if ( video->UpdateRects ) { |
668 | video->UpdateRects(this, 1, &area); |
669 | } |
670 | } |
671 | } |
672 | |
673 | void SDL_EraseCursorNoLock(SDL_Surface *screen) |
674 | { |
675 | SDL_Rect area; |
676 | |
677 | /* Get the mouse rectangle, clipped to the screen */ |
678 | SDL_MouseRect(&area); |
679 | if ( (area.w == 0) || (area.h == 0) ) { |
680 | return; |
681 | } |
682 | |
683 | /* Copy mouse background */ |
684 | { int w, h, screenbpp; |
685 | Uint8 *src, *dst; |
686 | |
687 | /* Set up the copy pointers */ |
688 | screenbpp = screen->format->BytesPerPixel; |
689 | if ( (screen == SDL_VideoSurface) || |
690 | FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { |
691 | src = SDL_cursor->save[0]; |
692 | } else { |
693 | src = SDL_cursor->save[1]; |
694 | } |
695 | dst = (Uint8 *)screen->pixels + area.y * screen->pitch + |
696 | area.x * screenbpp; |
697 | |
698 | /* Perform the copy */ |
699 | w = area.w*screenbpp; |
700 | h = area.h; |
701 | while ( h-- ) { |
702 | SDL_memcpy(dst, src, w); |
703 | src += w; |
704 | dst += screen->pitch; |
705 | } |
706 | |
707 | /* Perform pixel conversion on cursor background */ |
708 | if ( src > SDL_cursor->save[1] ) { |
709 | SDL_ConvertCursorSave(screen, area.w, area.h); |
710 | } |
711 | } |
712 | } |
713 | |
714 | void SDL_EraseCursor(SDL_Surface *screen) |
715 | { |
716 | /* Lock the screen if necessary */ |
717 | if ( screen == NULL ) { |
718 | return; |
719 | } |
720 | if ( SDL_MUSTLOCK(screen) ) { |
721 | if ( SDL_LockSurface(screen) < 0 ) { |
722 | return; |
723 | } |
724 | } |
725 | |
726 | SDL_EraseCursorNoLock(screen); |
727 | |
728 | /* Unlock the screen and update if necessary */ |
729 | if ( SDL_MUSTLOCK(screen) ) { |
730 | SDL_UnlockSurface(screen); |
731 | } |
732 | if ( (screen == SDL_VideoSurface) && |
733 | ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { |
734 | SDL_VideoDevice *video = current_video; |
735 | SDL_VideoDevice *this = current_video; |
736 | SDL_Rect area; |
737 | |
738 | SDL_MouseRect(&area); |
739 | if ( video->UpdateRects ) { |
740 | video->UpdateRects(this, 1, &area); |
741 | } |
742 | } |
743 | } |
744 | |
745 | /* Reset the cursor on video mode change |
746 | FIXME: Keep track of all cursors, and reset them all. |
747 | */ |
748 | void SDL_ResetCursor(void) |
749 | { |
750 | int savelen; |
751 | |
752 | if ( SDL_cursor ) { |
753 | savelen = SDL_cursor->area.w*4*SDL_cursor->area.h; |
754 | SDL_cursor->area.x = 0; |
755 | SDL_cursor->area.y = 0; |
756 | SDL_memset(SDL_cursor->save[0], 0, savelen); |
757 | } |
758 | } |