Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 42:eb1459f3a3ae
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| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Sun, 27 May 2001 00:38:26 +0000 |
| parents | cf2af46e9e2a |
| children | 1e7e61b9b0f9 |
| rev | line source |
|---|---|
| 0 | 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 /* General cursor handling code for SDL */ | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <string.h> | |
| 33 | |
| 34 #include "SDL_mutex.h" | |
| 35 #include "SDL_error.h" | |
| 36 #include "SDL_video.h" | |
| 37 #include "SDL_mouse.h" | |
| 38 #include "SDL_blit.h" | |
| 39 #include "SDL_events_c.h" | |
| 40 #include "SDL_sysvideo.h" | |
| 41 #include "SDL_sysevents.h" | |
| 42 #include "SDL_cursor_c.h" | |
| 43 #include "SDL_pixels_c.h" | |
| 44 #include "default_cursor.h" | |
| 45 | |
| 46 /* These are static for our cursor handling code */ | |
| 47 volatile int SDL_cursorstate = CURSOR_VISIBLE; | |
| 48 SDL_Cursor *SDL_cursor = NULL; | |
| 49 static SDL_Cursor *SDL_defcursor = NULL; | |
| 50 SDL_mutex *SDL_cursorlock = NULL; | |
| 51 | |
| 52 /* Public functions */ | |
| 53 void SDL_CursorQuit(void) | |
| 54 { | |
| 55 if ( SDL_cursor != NULL ) { | |
| 56 SDL_Cursor *cursor; | |
| 57 | |
| 58 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 59 if ( SDL_cursor != SDL_defcursor ) { | |
| 60 SDL_FreeCursor(SDL_cursor); | |
| 61 } | |
| 62 SDL_cursor = NULL; | |
| 63 if ( SDL_defcursor != NULL ) { | |
| 64 cursor = SDL_defcursor; | |
| 65 SDL_defcursor = NULL; | |
| 66 SDL_FreeCursor(cursor); | |
| 67 } | |
| 68 } | |
| 69 if ( SDL_cursorlock != NULL ) { | |
| 70 SDL_DestroyMutex(SDL_cursorlock); | |
| 71 SDL_cursorlock = NULL; | |
| 72 } | |
| 73 } | |
| 74 int SDL_CursorInit(Uint32 multithreaded) | |
| 75 { | |
| 76 /* We don't have mouse focus, and the cursor isn't drawn yet */ | |
| 77 SDL_cursorstate = CURSOR_VISIBLE; | |
| 78 | |
| 79 /* Create the default cursor */ | |
| 80 if ( SDL_defcursor == NULL ) { | |
| 81 SDL_defcursor = SDL_CreateCursor(default_cdata, default_cmask, | |
| 82 DEFAULT_CWIDTH, DEFAULT_CHEIGHT, | |
| 83 DEFAULT_CHOTX, DEFAULT_CHOTY); | |
| 84 SDL_SetCursor(SDL_defcursor); | |
| 85 } | |
| 86 | |
| 87 /* Create a lock if necessary */ | |
| 88 if ( multithreaded ) { | |
| 89 SDL_cursorlock = SDL_CreateMutex(); | |
| 90 } | |
| 91 | |
| 92 /* That's it! */ | |
| 93 return(0); | |
| 94 } | |
| 95 | |
| 96 /* Multi-thread support for cursors */ | |
| 97 #ifndef SDL_LockCursor | |
| 98 void SDL_LockCursor(void) | |
| 99 { | |
| 100 if ( SDL_cursorlock ) { | |
| 101 SDL_mutexP(SDL_cursorlock); | |
| 102 } | |
| 103 } | |
| 104 #endif | |
| 105 #ifndef SDL_UnlockCursor | |
| 106 void SDL_UnlockCursor(void) | |
| 107 { | |
| 108 if ( SDL_cursorlock ) { | |
| 109 SDL_mutexV(SDL_cursorlock); | |
| 110 } | |
| 111 } | |
| 112 #endif | |
| 113 | |
| 114 /* Software cursor drawing support */ | |
| 115 SDL_Cursor * SDL_CreateCursor (Uint8 *data, Uint8 *mask, | |
| 116 int w, int h, int hot_x, int hot_y) | |
| 117 { | |
| 118 SDL_VideoDevice *video = current_video; | |
| 119 int savelen; | |
| 120 int i; | |
| 121 SDL_Cursor *cursor; | |
| 122 | |
| 123 /* Make sure the width is a multiple of 8 */ | |
| 124 w = ((w+7)&~7); | |
| 125 | |
| 126 /* Sanity check the hot spot */ | |
| 127 if ( (hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h) ) { | |
| 128 SDL_SetError("Cursor hot spot doesn't lie within cursor"); | |
| 129 return(NULL); | |
| 130 } | |
| 131 | |
| 132 /* Allocate memory for the cursor */ | |
| 133 cursor = (SDL_Cursor *)malloc(sizeof *cursor); | |
| 134 if ( cursor == NULL ) { | |
| 135 SDL_OutOfMemory(); | |
| 136 return(NULL); | |
| 137 } | |
| 138 savelen = (w*4)*h; | |
| 139 cursor->area.x = 0; | |
| 140 cursor->area.y = 0; | |
| 141 cursor->area.w = w; | |
| 142 cursor->area.h = h; | |
| 143 cursor->hot_x = hot_x; | |
| 144 cursor->hot_y = hot_y; | |
| 145 cursor->data = (Uint8 *)malloc((w/8)*h*2); | |
| 146 cursor->mask = cursor->data+((w/8)*h); | |
| 147 cursor->save[0] = (Uint8 *)malloc(savelen*2); | |
| 148 cursor->save[1] = cursor->save[0] + savelen; | |
| 149 cursor->wm_cursor = NULL; | |
| 150 if ( ! cursor->data || ! cursor->save[0] ) { | |
| 151 SDL_FreeCursor(cursor); | |
| 152 SDL_OutOfMemory(); | |
| 153 return(NULL); | |
| 154 } | |
| 155 for ( i=((w/8)*h)-1; i>=0; --i ) { | |
| 156 cursor->data[i] = data[i]; | |
| 157 cursor->mask[i] = mask[i] | data[i]; | |
| 158 } | |
| 159 memset(cursor->save[0], 0, savelen*2); | |
| 160 | |
| 161 /* If the window manager gives us a good cursor, we're done! */ | |
| 162 if ( video->CreateWMCursor ) { | |
| 163 cursor->wm_cursor = video->CreateWMCursor(video, data, mask, | |
| 164 w, h, hot_x, hot_y); | |
| 165 } else { | |
| 166 cursor->wm_cursor = NULL; | |
| 167 } | |
| 168 return(cursor); | |
| 169 } | |
| 170 | |
| 171 /* SDL_SetCursor(NULL) can be used to force the cursor redraw, | |
| 172 if this is desired for any reason. This is used when setting | |
| 173 the video mode and when the SDL window gains the mouse focus. | |
| 174 */ | |
| 175 void SDL_SetCursor (SDL_Cursor *cursor) | |
| 176 { | |
| 177 SDL_VideoDevice *video = current_video; | |
| 178 SDL_VideoDevice *this = current_video; | |
| 179 | |
| 180 /* Make sure that the video subsystem has been initialized */ | |
| 181 if ( ! video ) { | |
| 182 return; | |
| 183 } | |
| 184 | |
| 185 /* Prevent the event thread from moving the mouse */ | |
| 186 SDL_LockCursor(); | |
| 187 | |
| 188 /* Set the new cursor */ | |
| 189 if ( cursor && (cursor != SDL_cursor) ) { | |
| 190 /* Erase the current mouse position */ | |
| 191 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 192 SDL_EraseCursor(SDL_VideoSurface); | |
| 193 } else if ( video->MoveWMCursor ) { | |
| 194 /* If the video driver is moving the cursor directly, | |
| 195 it needs to hide the old cursor before (possibly) | |
| 196 showing the new one. (But don't erase NULL cursor) | |
| 197 */ | |
| 198 if ( SDL_cursor ) { | |
| 199 video->ShowWMCursor(this, NULL); | |
| 200 } | |
| 201 } | |
| 202 SDL_cursor = cursor; | |
| 203 } | |
| 204 | |
| 205 /* Draw the new mouse cursor */ | |
| 206 if ( SDL_cursor && (SDL_cursorstate&CURSOR_VISIBLE) ) { | |
| 207 /* Use window manager cursor if possible */ | |
| 208 if ( SDL_cursor->wm_cursor && | |
| 209 video->ShowWMCursor(this, SDL_cursor->wm_cursor) ) | |
| 210 SDL_cursorstate &= ~CURSOR_USINGSW; | |
| 211 else { | |
| 212 SDL_cursorstate |= CURSOR_USINGSW; | |
| 213 if ( video->ShowWMCursor ) { | |
| 214 video->ShowWMCursor(this, NULL); | |
| 215 } | |
| 216 { int x, y; | |
| 217 SDL_GetMouseState(&x, &y); | |
| 218 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 219 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 220 } | |
| 221 SDL_DrawCursor(SDL_VideoSurface); | |
| 222 } | |
| 223 } else { | |
| 224 /* Erase window manager mouse (cursor not visible) */ | |
| 225 if ( SDL_cursor && (SDL_cursorstate & CURSOR_USINGSW) ) { | |
| 226 SDL_EraseCursor(SDL_VideoSurface); | |
| 227 } else { | |
| 228 if ( video ) { | |
| 229 video->ShowWMCursor(this, NULL); | |
| 230 } | |
| 231 } | |
| 232 } | |
| 233 SDL_UnlockCursor(); | |
| 234 } | |
| 235 | |
| 236 SDL_Cursor * SDL_GetCursor (void) | |
| 237 { | |
| 238 return(SDL_cursor); | |
| 239 } | |
| 240 | |
| 241 void SDL_FreeCursor (SDL_Cursor *cursor) | |
| 242 { | |
| 243 if ( cursor ) { | |
| 244 if ( cursor == SDL_cursor ) { | |
| 245 SDL_SetCursor(SDL_defcursor); | |
| 246 } | |
| 247 if ( cursor != SDL_defcursor ) { | |
| 248 if ( cursor->data ) { | |
| 249 free(cursor->data); | |
| 250 } | |
| 251 if ( cursor->save[0] ) { | |
| 252 free(cursor->save[0]); | |
| 253 } | |
| 254 if ( cursor->wm_cursor ) { | |
| 255 SDL_VideoDevice *video = current_video; | |
| 256 SDL_VideoDevice *this = current_video; | |
| 257 video->FreeWMCursor(this, cursor->wm_cursor); | |
| 258 } | |
| 259 free(cursor); | |
| 260 } | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 int SDL_ShowCursor (int toggle) | |
| 265 { | |
| 266 int showing; | |
| 267 | |
| 268 showing = (SDL_cursorstate & CURSOR_VISIBLE); | |
| 269 if ( toggle >= 0 ) { | |
| 270 SDL_LockCursor(); | |
| 271 if ( toggle ) { | |
| 272 SDL_cursorstate |= CURSOR_VISIBLE; | |
| 273 } else { | |
| 274 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 275 } | |
| 276 SDL_UnlockCursor(); | |
| 277 if ( (SDL_cursorstate & CURSOR_VISIBLE) != showing ) { | |
| 278 SDL_VideoDevice *video = current_video; | |
| 279 SDL_VideoDevice *this = current_video; | |
| 280 | |
| 281 SDL_SetCursor(NULL); | |
| 282 if ( video && video->CheckMouseMode ) { | |
| 283 video->CheckMouseMode(this); | |
| 284 } | |
| 285 } | |
| 286 } else { | |
| 287 /* Query current state */ ; | |
| 288 } | |
| 289 return(showing ? 1 : 0); | |
| 290 } | |
| 291 | |
| 292 void SDL_WarpMouse (Uint16 x, Uint16 y) | |
| 293 { | |
| 294 SDL_VideoDevice *video = current_video; | |
| 295 SDL_VideoDevice *this = current_video; | |
| 296 | |
| 297 /* This generates a mouse motion event */ | |
| 298 if ( video->WarpWMCursor ) { | |
| 299 video->WarpWMCursor(this, x, y); | |
| 300 } else { | |
| 301 x += (this->screen->offset % this->screen->pitch) / | |
| 302 this->screen->format->BytesPerPixel; | |
| 303 y += (this->screen->offset / this->screen->pitch); | |
| 304 SDL_PrivateMouseMotion(0, 0, x, y); | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 void SDL_MoveCursor(int x, int y) | |
| 309 { | |
| 310 SDL_VideoDevice *video = current_video; | |
| 311 | |
| 312 /* Erase and update the current mouse position */ | |
| 313 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 314 /* Erase and redraw mouse cursor in new position */ | |
| 315 SDL_LockCursor(); | |
| 316 SDL_EraseCursor(SDL_VideoSurface); | |
| 317 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 318 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 319 SDL_DrawCursor(SDL_VideoSurface); | |
| 320 SDL_UnlockCursor(); | |
| 321 } else if ( video->MoveWMCursor ) { | |
| 322 video->MoveWMCursor(video, x, y); | |
| 323 } | |
| 324 } | |
| 325 | |
| 326 /* Keep track of the current cursor colors */ | |
| 327 static int palette_changed = 1; | |
| 328 static Uint32 pixels8[2]; | |
| 329 | |
| 330 void SDL_CursorPaletteChanged(void) | |
| 331 { | |
| 332 palette_changed = 1; | |
| 333 } | |
| 334 | |
| 335 void SDL_MouseRect(SDL_Rect *area) | |
| 336 { | |
| 337 int clip_diff; | |
| 338 | |
| 339 *area = SDL_cursor->area; | |
| 340 if ( area->x < 0 ) { | |
| 341 area->w += area->x; | |
| 342 area->x = 0; | |
| 343 } | |
| 344 if ( area->y < 0 ) { | |
| 345 area->h += area->y; | |
| 346 area->y = 0; | |
| 347 } | |
| 348 clip_diff = (area->x+area->w)-SDL_VideoSurface->w; | |
| 349 if ( clip_diff > 0 ) { | |
| 350 area->w -= clip_diff; | |
| 351 } | |
| 352 clip_diff = (area->y+area->h)-SDL_VideoSurface->h; | |
| 353 if ( clip_diff > 0 ) { | |
| 354 area->h -= clip_diff; | |
| 355 } | |
| 356 } | |
| 357 | |
| 358 static void SDL_DrawCursorFast(SDL_Surface *screen, SDL_Rect *area) | |
| 359 { | |
| 360 const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 }; | |
| 361 int i, w, h; | |
| 362 Uint8 *data, datab; | |
| 363 Uint8 *mask, maskb; | |
| 364 | |
| 365 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 366 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 367 switch (screen->format->BytesPerPixel) { | |
| 368 | |
| 369 case 1: { | |
| 370 Uint8 *dst; | |
| 371 int dstskip; | |
| 372 | |
| 373 if ( palette_changed ) { | |
| 374 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 375 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 376 palette_changed = 0; | |
| 377 } | |
| 378 dst = (Uint8 *)screen->pixels + | |
| 379 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 380 SDL_cursor->area.x; | |
| 381 dstskip = screen->pitch-area->w; | |
| 382 | |
| 383 for ( h=area->h; h; h-- ) { | |
| 384 for ( w=area->w/8; w; w-- ) { | |
| 385 maskb = *mask++; | |
| 386 datab = *data++; | |
| 387 for ( i=0; i<8; ++i ) { | |
| 388 if ( maskb & 0x80 ) { | |
| 389 *dst = pixels8[datab>>7]; | |
| 390 } | |
| 391 maskb <<= 1; | |
| 392 datab <<= 1; | |
| 393 dst++; | |
| 394 } | |
| 395 } | |
| 396 dst += dstskip; | |
| 397 } | |
| 398 } | |
| 399 break; | |
| 400 | |
| 401 case 2: { | |
| 402 Uint16 *dst; | |
| 403 int dstskip; | |
| 404 | |
| 405 dst = (Uint16 *)screen->pixels + | |
| 406 (SDL_cursor->area.y+area->y)*screen->pitch/2 + | |
| 407 SDL_cursor->area.x; | |
| 408 dstskip = (screen->pitch/2)-area->w; | |
| 409 | |
| 410 for ( h=area->h; h; h-- ) { | |
| 411 for ( w=area->w/8; w; w-- ) { | |
| 412 maskb = *mask++; | |
| 413 datab = *data++; | |
| 414 for ( i=0; i<8; ++i ) { | |
| 415 if ( maskb & 0x80 ) { | |
| 416 *dst = pixels[datab>>7]; | |
| 417 } | |
| 418 maskb <<= 1; | |
| 419 datab <<= 1; | |
| 420 dst++; | |
| 421 } | |
| 422 } | |
| 423 dst += dstskip; | |
| 424 } | |
| 425 } | |
| 426 break; | |
| 427 | |
| 428 case 3: { | |
| 429 Uint8 *dst; | |
| 430 int dstskip; | |
| 431 | |
| 432 dst = (Uint8 *)screen->pixels + | |
| 433 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 434 SDL_cursor->area.x*3; | |
| 435 dstskip = screen->pitch-area->w*3; | |
| 436 | |
| 437 for ( h=area->h; h; h-- ) { | |
| 438 for ( w=area->w/8; w; w-- ) { | |
| 439 maskb = *mask++; | |
| 440 datab = *data++; | |
| 441 for ( i=0; i<8; ++i ) { | |
| 442 if ( maskb & 0x80 ) { | |
| 443 memset(dst,pixels[datab>>7],3); | |
| 444 } | |
| 445 maskb <<= 1; | |
| 446 datab <<= 1; | |
| 447 dst += 3; | |
| 448 } | |
| 449 } | |
| 450 dst += dstskip; | |
| 451 } | |
| 452 } | |
| 453 break; | |
| 454 | |
| 455 case 4: { | |
| 456 Uint32 *dst; | |
| 457 int dstskip; | |
| 458 | |
| 459 dst = (Uint32 *)screen->pixels + | |
| 460 (SDL_cursor->area.y+area->y)*screen->pitch/4 + | |
| 461 SDL_cursor->area.x; | |
| 462 dstskip = (screen->pitch/4)-area->w; | |
| 463 | |
| 464 for ( h=area->h; h; h-- ) { | |
| 465 for ( w=area->w/8; w; w-- ) { | |
| 466 maskb = *mask++; | |
| 467 datab = *data++; | |
| 468 for ( i=0; i<8; ++i ) { | |
| 469 if ( maskb & 0x80 ) { | |
| 470 *dst = pixels[datab>>7]; | |
| 471 } | |
| 472 maskb <<= 1; | |
| 473 datab <<= 1; | |
| 474 dst++; | |
| 475 } | |
| 476 } | |
| 477 dst += dstskip; | |
| 478 } | |
| 479 } | |
| 480 break; | |
| 481 } | |
| 482 } | |
| 483 | |
| 484 static void SDL_DrawCursorSlow(SDL_Surface *screen, SDL_Rect *area) | |
| 485 { | |
| 486 const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 }; | |
| 487 int h; | |
| 488 int x, minx, maxx; | |
| 489 Uint8 *data, datab = 0; | |
| 490 Uint8 *mask, maskb = 0; | |
| 491 Uint8 *dst; | |
| 492 int dstbpp, dstskip; | |
| 493 | |
| 494 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 495 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 496 dstbpp = screen->format->BytesPerPixel; | |
| 497 dst = (Uint8 *)screen->pixels + | |
| 498 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 499 SDL_cursor->area.x*dstbpp; | |
| 500 dstskip = screen->pitch-SDL_cursor->area.w*dstbpp; | |
| 501 | |
| 502 minx = area->x; | |
| 503 maxx = area->x+area->w; | |
| 504 if ( screen->format->BytesPerPixel == 1 ) { | |
| 505 if ( palette_changed ) { | |
| 506 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 507 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 508 palette_changed = 0; | |
| 509 } | |
| 510 for ( h=area->h; h; h-- ) { | |
| 511 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 512 if ( (x%8) == 0 ) { | |
| 513 maskb = *mask++; | |
| 514 datab = *data++; | |
| 515 } | |
| 516 if ( (x >= minx) && (x < maxx) ) { | |
| 517 if ( maskb & 0x80 ) { | |
| 518 memset(dst, pixels8[datab>>7], dstbpp); | |
| 519 } | |
| 520 } | |
| 521 maskb <<= 1; | |
| 522 datab <<= 1; | |
| 523 dst += dstbpp; | |
| 524 } | |
| 525 dst += dstskip; | |
| 526 } | |
| 527 } else { | |
| 528 for ( h=area->h; h; h-- ) { | |
| 529 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 530 if ( (x%8) == 0 ) { | |
| 531 maskb = *mask++; | |
| 532 datab = *data++; | |
| 533 } | |
| 534 if ( (x >= minx) && (x < maxx) ) { | |
| 535 if ( maskb & 0x80 ) { | |
| 536 memset(dst, pixels[datab>>7], dstbpp); | |
| 537 } | |
| 538 } | |
| 539 maskb <<= 1; | |
| 540 datab <<= 1; | |
| 541 dst += dstbpp; | |
| 542 } | |
| 543 dst += dstskip; | |
| 544 } | |
| 545 } | |
| 546 } | |
| 547 | |
| 548 /* This handles the ugly work of converting the saved cursor background from | |
| 549 the pixel format of the shadow surface to that of the video surface. | |
| 550 This is only necessary when blitting from a shadow surface of a different | |
| 551 pixel format than the video surface, and using a software rendered cursor. | |
| 552 */ | |
| 553 static void SDL_ConvertCursorSave(SDL_Surface *screen, int w, int h) | |
| 554 { | |
| 555 SDL_BlitInfo info; | |
| 556 SDL_loblit RunBlit; | |
| 557 | |
| 558 /* Make sure we can steal the blit mapping */ | |
| 559 if ( screen->map->dst != SDL_VideoSurface ) { | |
| 560 return; | |
| 561 } | |
| 562 | |
| 563 /* Set up the blit information */ | |
| 564 info.s_pixels = SDL_cursor->save[1]; | |
| 565 info.s_width = w; | |
| 566 info.s_height = h; | |
| 567 info.s_skip = 0; | |
| 568 info.d_pixels = SDL_cursor->save[0]; | |
| 569 info.d_width = w; | |
| 570 info.d_height = h; | |
| 571 info.d_skip = 0; | |
| 572 info.aux_data = screen->map->sw_data->aux_data; | |
| 573 info.src = screen->format; | |
| 574 info.table = screen->map->table; | |
| 575 info.dst = SDL_VideoSurface->format; | |
| 576 RunBlit = screen->map->sw_data->blit; | |
| 577 | |
| 578 /* Run the actual software blit */ | |
| 579 RunBlit(&info); | |
| 580 } | |
| 581 | |
| 582 void SDL_DrawCursorNoLock(SDL_Surface *screen) | |
| 583 { | |
| 584 SDL_Rect area; | |
| 585 | |
| 586 /* Get the mouse rectangle, clipped to the screen */ | |
| 587 SDL_MouseRect(&area); | |
| 588 if ( (area.w == 0) || (area.h == 0) ) { | |
| 589 return; | |
| 590 } | |
| 591 | |
| 592 /* Copy mouse background */ | |
| 593 { int w, h, screenbpp; | |
| 594 Uint8 *src, *dst; | |
| 595 | |
| 596 /* Set up the copy pointers */ | |
| 597 screenbpp = screen->format->BytesPerPixel; | |
| 598 if ( (screen == SDL_VideoSurface) || | |
| 599 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 600 dst = SDL_cursor->save[0]; | |
| 601 } else { | |
| 602 dst = SDL_cursor->save[1]; | |
| 603 } | |
| 604 src = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 605 area.x * screenbpp; | |
| 606 | |
| 607 /* Perform the copy */ | |
| 608 w = area.w*screenbpp; | |
| 609 h = area.h; | |
| 610 while ( h-- ) { | |
| 611 memcpy(dst, src, w); | |
| 612 dst += w; | |
| 613 src += screen->pitch; | |
| 614 } | |
| 615 } | |
| 616 | |
| 617 /* Draw the mouse cursor */ | |
| 618 area.x -= SDL_cursor->area.x; | |
| 619 area.y -= SDL_cursor->area.y; | |
| 620 if ( (area.x == 0) && (area.w == SDL_cursor->area.w) ) { | |
| 621 SDL_DrawCursorFast(screen, &area); | |
| 622 } else { | |
| 623 SDL_DrawCursorSlow(screen, &area); | |
| 624 } | |
| 625 } | |
| 626 | |
| 627 void SDL_DrawCursor(SDL_Surface *screen) | |
| 628 { | |
| 629 /* Lock the screen if necessary */ | |
| 630 if ( screen == NULL ) { | |
| 631 return; | |
| 632 } | |
| 633 if ( SDL_MUSTLOCK(screen) ) { | |
| 634 if ( SDL_LockSurface(screen) < 0 ) { | |
| 635 return; | |
| 636 } | |
| 637 } | |
| 638 | |
| 639 SDL_DrawCursorNoLock(screen); | |
| 640 | |
| 641 /* Unlock the screen and update if necessary */ | |
| 642 if ( SDL_MUSTLOCK(screen) ) { | |
| 643 SDL_UnlockSurface(screen); | |
| 644 } | |
| 645 if ( (screen == SDL_VideoSurface) && | |
| 646 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 647 SDL_VideoDevice *video = current_video; | |
| 648 SDL_VideoDevice *this = current_video; | |
| 649 SDL_Rect area; | |
| 650 | |
| 651 SDL_MouseRect(&area); | |
| 652 | |
| 653 /* This can be called before a video mode is set */ | |
| 654 if ( video->UpdateRects ) { | |
| 655 video->UpdateRects(this, 1, &area); | |
| 656 } | |
| 657 } | |
| 658 } | |
| 659 | |
| 660 void SDL_EraseCursorNoLock(SDL_Surface *screen) | |
| 661 { | |
| 662 SDL_Rect area; | |
| 663 | |
| 664 /* Get the mouse rectangle, clipped to the screen */ | |
| 665 SDL_MouseRect(&area); | |
| 666 if ( (area.w == 0) || (area.h == 0) ) { | |
| 667 return; | |
| 668 } | |
| 669 | |
| 670 /* Copy mouse background */ | |
| 671 { int w, h, screenbpp; | |
| 672 Uint8 *src, *dst; | |
| 673 | |
| 674 /* Set up the copy pointers */ | |
| 675 screenbpp = screen->format->BytesPerPixel; | |
| 676 if ( (screen == SDL_VideoSurface) || | |
| 677 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 678 src = SDL_cursor->save[0]; | |
| 679 } else { | |
| 680 src = SDL_cursor->save[1]; | |
| 681 } | |
| 682 dst = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 683 area.x * screenbpp; | |
| 684 | |
| 685 /* Perform the copy */ | |
| 686 w = area.w*screenbpp; | |
| 687 h = area.h; | |
| 688 while ( h-- ) { | |
| 689 memcpy(dst, src, w); | |
| 690 src += w; | |
| 691 dst += screen->pitch; | |
| 692 } | |
| 693 | |
| 694 /* Perform pixel conversion on cursor background */ | |
| 695 if ( src > SDL_cursor->save[1] ) { | |
| 696 SDL_ConvertCursorSave(screen, area.w, area.h); | |
| 697 } | |
| 698 } | |
| 699 } | |
| 700 | |
| 701 void SDL_EraseCursor(SDL_Surface *screen) | |
| 702 { | |
| 703 /* Lock the screen if necessary */ | |
| 704 if ( screen == NULL ) { | |
| 705 return; | |
| 706 } | |
| 707 if ( SDL_MUSTLOCK(screen) ) { | |
| 708 if ( SDL_LockSurface(screen) < 0 ) { | |
| 709 return; | |
| 710 } | |
| 711 } | |
| 712 | |
| 713 SDL_EraseCursorNoLock(screen); | |
| 714 | |
| 715 /* Unlock the screen and update if necessary */ | |
| 716 if ( SDL_MUSTLOCK(screen) ) { | |
| 717 SDL_UnlockSurface(screen); | |
| 718 } | |
| 719 if ( (screen == SDL_VideoSurface) && | |
| 720 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 721 SDL_VideoDevice *video = current_video; | |
| 722 SDL_VideoDevice *this = current_video; | |
| 723 SDL_Rect area; | |
| 724 | |
| 725 SDL_MouseRect(&area); | |
|
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726 if ( video->UpdateRects ) { |
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Changes since SDL 1.2.0 release
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parents:
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changeset
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727 video->UpdateRects(this, 1, &area); |
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Changes since SDL 1.2.0 release
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parents:
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changeset
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728 } |
| 0 | 729 } |
| 730 } | |
| 731 | |
| 732 /* Reset the cursor on video mode change | |
| 733 FIXME: Keep track of all cursors, and reset them all. | |
| 734 */ | |
| 735 void SDL_ResetCursor(void) | |
| 736 { | |
| 737 int savelen; | |
| 738 | |
| 739 if ( SDL_cursor ) { | |
| 740 savelen = SDL_cursor->area.w*4*SDL_cursor->area.h; | |
| 741 SDL_cursor->area.x = 0; | |
| 742 SDL_cursor->area.y = 0; | |
| 743 memset(SDL_cursor->save[0], 0, savelen); | |
| 744 } | |
| 745 } |