| 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 | } |