Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 1330:450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
using Visual C++ 2005
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 06 Feb 2006 08:28:51 +0000 |
| parents | c9b51268668f |
| children | 3692456e7b0f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* General cursor handling code for SDL */ | |
| 24 | |
| 25 #include "SDL_mutex.h" | |
| 26 #include "SDL_error.h" | |
| 27 #include "SDL_video.h" | |
| 28 #include "SDL_mouse.h" | |
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29 #include "SDL_stdlib.h" |
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30 #include "SDL_string.h" |
| 0 | 31 #include "SDL_blit.h" |
| 32 #include "SDL_events_c.h" | |
| 33 #include "SDL_sysvideo.h" | |
| 34 #include "SDL_sysevents.h" | |
| 35 #include "SDL_cursor_c.h" | |
| 36 #include "SDL_pixels_c.h" | |
| 37 #include "default_cursor.h" | |
| 38 | |
| 39 /* These are static for our cursor handling code */ | |
| 40 volatile int SDL_cursorstate = CURSOR_VISIBLE; | |
| 41 SDL_Cursor *SDL_cursor = NULL; | |
| 42 static SDL_Cursor *SDL_defcursor = NULL; | |
| 43 SDL_mutex *SDL_cursorlock = NULL; | |
| 44 | |
| 45 /* Public functions */ | |
| 46 void SDL_CursorQuit(void) | |
| 47 { | |
| 48 if ( SDL_cursor != NULL ) { | |
| 49 SDL_Cursor *cursor; | |
| 50 | |
| 51 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 52 if ( SDL_cursor != SDL_defcursor ) { | |
| 53 SDL_FreeCursor(SDL_cursor); | |
| 54 } | |
| 55 SDL_cursor = NULL; | |
| 56 if ( SDL_defcursor != NULL ) { | |
| 57 cursor = SDL_defcursor; | |
| 58 SDL_defcursor = NULL; | |
| 59 SDL_FreeCursor(cursor); | |
| 60 } | |
| 61 } | |
| 62 if ( SDL_cursorlock != NULL ) { | |
| 63 SDL_DestroyMutex(SDL_cursorlock); | |
| 64 SDL_cursorlock = NULL; | |
| 65 } | |
| 66 } | |
| 67 int SDL_CursorInit(Uint32 multithreaded) | |
| 68 { | |
| 69 /* We don't have mouse focus, and the cursor isn't drawn yet */ | |
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70 #ifndef IPOD |
| 0 | 71 SDL_cursorstate = CURSOR_VISIBLE; |
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72 #endif |
| 0 | 73 |
| 74 /* Create the default cursor */ | |
| 75 if ( SDL_defcursor == NULL ) { | |
| 76 SDL_defcursor = SDL_CreateCursor(default_cdata, default_cmask, | |
| 77 DEFAULT_CWIDTH, DEFAULT_CHEIGHT, | |
| 78 DEFAULT_CHOTX, DEFAULT_CHOTY); | |
| 79 SDL_SetCursor(SDL_defcursor); | |
| 80 } | |
| 81 | |
| 82 /* Create a lock if necessary */ | |
| 83 if ( multithreaded ) { | |
| 84 SDL_cursorlock = SDL_CreateMutex(); | |
| 85 } | |
| 86 | |
| 87 /* That's it! */ | |
| 88 return(0); | |
| 89 } | |
| 90 | |
| 91 /* Multi-thread support for cursors */ | |
| 92 #ifndef SDL_LockCursor | |
| 93 void SDL_LockCursor(void) | |
| 94 { | |
| 95 if ( SDL_cursorlock ) { | |
| 96 SDL_mutexP(SDL_cursorlock); | |
| 97 } | |
| 98 } | |
| 99 #endif | |
| 100 #ifndef SDL_UnlockCursor | |
| 101 void SDL_UnlockCursor(void) | |
| 102 { | |
| 103 if ( SDL_cursorlock ) { | |
| 104 SDL_mutexV(SDL_cursorlock); | |
| 105 } | |
| 106 } | |
| 107 #endif | |
| 108 | |
| 109 /* Software cursor drawing support */ | |
| 110 SDL_Cursor * SDL_CreateCursor (Uint8 *data, Uint8 *mask, | |
| 111 int w, int h, int hot_x, int hot_y) | |
| 112 { | |
| 113 SDL_VideoDevice *video = current_video; | |
| 114 int savelen; | |
| 115 int i; | |
| 116 SDL_Cursor *cursor; | |
| 117 | |
| 118 /* Make sure the width is a multiple of 8 */ | |
| 119 w = ((w+7)&~7); | |
| 120 | |
| 121 /* Sanity check the hot spot */ | |
| 122 if ( (hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h) ) { | |
| 123 SDL_SetError("Cursor hot spot doesn't lie within cursor"); | |
| 124 return(NULL); | |
| 125 } | |
| 126 | |
| 127 /* Allocate memory for the cursor */ | |
| 128 cursor = (SDL_Cursor *)malloc(sizeof *cursor); | |
| 129 if ( cursor == NULL ) { | |
| 130 SDL_OutOfMemory(); | |
| 131 return(NULL); | |
| 132 } | |
| 133 savelen = (w*4)*h; | |
| 134 cursor->area.x = 0; | |
| 135 cursor->area.y = 0; | |
| 136 cursor->area.w = w; | |
| 137 cursor->area.h = h; | |
| 138 cursor->hot_x = hot_x; | |
| 139 cursor->hot_y = hot_y; | |
| 140 cursor->data = (Uint8 *)malloc((w/8)*h*2); | |
| 141 cursor->mask = cursor->data+((w/8)*h); | |
| 142 cursor->save[0] = (Uint8 *)malloc(savelen*2); | |
| 143 cursor->save[1] = cursor->save[0] + savelen; | |
| 144 cursor->wm_cursor = NULL; | |
| 145 if ( ! cursor->data || ! cursor->save[0] ) { | |
| 146 SDL_FreeCursor(cursor); | |
| 147 SDL_OutOfMemory(); | |
| 148 return(NULL); | |
| 149 } | |
| 150 for ( i=((w/8)*h)-1; i>=0; --i ) { | |
| 151 cursor->data[i] = data[i]; | |
| 152 cursor->mask[i] = mask[i] | data[i]; | |
| 153 } | |
| 154 memset(cursor->save[0], 0, savelen*2); | |
| 155 | |
| 156 /* If the window manager gives us a good cursor, we're done! */ | |
| 157 if ( video->CreateWMCursor ) { | |
| 158 cursor->wm_cursor = video->CreateWMCursor(video, data, mask, | |
| 159 w, h, hot_x, hot_y); | |
| 160 } else { | |
| 161 cursor->wm_cursor = NULL; | |
| 162 } | |
| 163 return(cursor); | |
| 164 } | |
| 165 | |
| 166 /* SDL_SetCursor(NULL) can be used to force the cursor redraw, | |
| 167 if this is desired for any reason. This is used when setting | |
| 168 the video mode and when the SDL window gains the mouse focus. | |
| 169 */ | |
| 170 void SDL_SetCursor (SDL_Cursor *cursor) | |
| 171 { | |
| 172 SDL_VideoDevice *video = current_video; | |
| 173 SDL_VideoDevice *this = current_video; | |
| 174 | |
| 175 /* Make sure that the video subsystem has been initialized */ | |
| 176 if ( ! video ) { | |
| 177 return; | |
| 178 } | |
| 179 | |
| 180 /* Prevent the event thread from moving the mouse */ | |
| 181 SDL_LockCursor(); | |
| 182 | |
| 183 /* Set the new cursor */ | |
| 184 if ( cursor && (cursor != SDL_cursor) ) { | |
| 185 /* Erase the current mouse position */ | |
| 186 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 187 SDL_EraseCursor(SDL_VideoSurface); | |
| 188 } else if ( video->MoveWMCursor ) { | |
| 189 /* If the video driver is moving the cursor directly, | |
| 190 it needs to hide the old cursor before (possibly) | |
| 191 showing the new one. (But don't erase NULL cursor) | |
| 192 */ | |
| 193 if ( SDL_cursor ) { | |
| 194 video->ShowWMCursor(this, NULL); | |
| 195 } | |
| 196 } | |
| 197 SDL_cursor = cursor; | |
| 198 } | |
| 199 | |
| 200 /* Draw the new mouse cursor */ | |
| 201 if ( SDL_cursor && (SDL_cursorstate&CURSOR_VISIBLE) ) { | |
| 202 /* Use window manager cursor if possible */ | |
| 203 if ( SDL_cursor->wm_cursor && | |
| 1296 | 204 video->ShowWMCursor(this, SDL_cursor->wm_cursor) ) { |
| 0 | 205 SDL_cursorstate &= ~CURSOR_USINGSW; |
| 1296 | 206 } else { |
| 0 | 207 SDL_cursorstate |= CURSOR_USINGSW; |
| 208 if ( video->ShowWMCursor ) { | |
| 209 video->ShowWMCursor(this, NULL); | |
| 210 } | |
| 211 { int x, y; | |
| 212 SDL_GetMouseState(&x, &y); | |
| 213 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 214 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 215 } | |
| 216 SDL_DrawCursor(SDL_VideoSurface); | |
| 217 } | |
| 218 } else { | |
| 219 /* Erase window manager mouse (cursor not visible) */ | |
| 220 if ( SDL_cursor && (SDL_cursorstate & CURSOR_USINGSW) ) { | |
| 221 SDL_EraseCursor(SDL_VideoSurface); | |
| 222 } else { | |
| 223 if ( video ) { | |
| 224 video->ShowWMCursor(this, NULL); | |
| 225 } | |
| 226 } | |
| 227 } | |
| 228 SDL_UnlockCursor(); | |
| 229 } | |
| 230 | |
| 231 SDL_Cursor * SDL_GetCursor (void) | |
| 232 { | |
| 233 return(SDL_cursor); | |
| 234 } | |
| 235 | |
| 236 void SDL_FreeCursor (SDL_Cursor *cursor) | |
| 237 { | |
| 238 if ( cursor ) { | |
| 239 if ( cursor == SDL_cursor ) { | |
| 240 SDL_SetCursor(SDL_defcursor); | |
| 241 } | |
| 242 if ( cursor != SDL_defcursor ) { | |
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243 SDL_VideoDevice *video = current_video; |
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244 SDL_VideoDevice *this = current_video; |
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245 |
| 0 | 246 if ( cursor->data ) { |
| 247 free(cursor->data); | |
| 248 } | |
| 249 if ( cursor->save[0] ) { | |
| 250 free(cursor->save[0]); | |
| 251 } | |
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252 if ( video && cursor->wm_cursor ) { |
| 0 | 253 video->FreeWMCursor(this, cursor->wm_cursor); |
| 254 } | |
| 255 free(cursor); | |
| 256 } | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 int SDL_ShowCursor (int toggle) | |
| 261 { | |
| 262 int showing; | |
| 263 | |
| 264 showing = (SDL_cursorstate & CURSOR_VISIBLE); | |
| 265 if ( toggle >= 0 ) { | |
| 266 SDL_LockCursor(); | |
| 267 if ( toggle ) { | |
| 268 SDL_cursorstate |= CURSOR_VISIBLE; | |
| 269 } else { | |
| 270 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 271 } | |
| 272 SDL_UnlockCursor(); | |
| 273 if ( (SDL_cursorstate & CURSOR_VISIBLE) != showing ) { | |
| 274 SDL_VideoDevice *video = current_video; | |
| 275 SDL_VideoDevice *this = current_video; | |
| 276 | |
| 277 SDL_SetCursor(NULL); | |
| 278 if ( video && video->CheckMouseMode ) { | |
| 279 video->CheckMouseMode(this); | |
| 280 } | |
| 281 } | |
| 282 } else { | |
| 283 /* Query current state */ ; | |
| 284 } | |
| 285 return(showing ? 1 : 0); | |
| 286 } | |
| 287 | |
| 288 void SDL_WarpMouse (Uint16 x, Uint16 y) | |
| 289 { | |
| 290 SDL_VideoDevice *video = current_video; | |
| 291 SDL_VideoDevice *this = current_video; | |
| 292 | |
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293 if ( !video || !SDL_PublicSurface ) { |
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294 SDL_SetError("A video mode must be set before warping mouse"); |
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295 return; |
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296 } |
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297 |
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298 /* If we have an offset video mode, offset the mouse coordinates */ |
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299 if (this->screen->pitch == 0) { |
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300 x += this->screen->offset / this->screen->format->BytesPerPixel; |
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301 y += this->screen->offset; |
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302 } else { |
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303 x += (this->screen->offset % this->screen->pitch) / |
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304 this->screen->format->BytesPerPixel; |
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305 y += (this->screen->offset / this->screen->pitch); |
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306 } |
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307 |
| 0 | 308 /* This generates a mouse motion event */ |
| 309 if ( video->WarpWMCursor ) { | |
| 310 video->WarpWMCursor(this, x, y); | |
| 311 } else { | |
| 312 SDL_PrivateMouseMotion(0, 0, x, y); | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 void SDL_MoveCursor(int x, int y) | |
| 317 { | |
| 318 SDL_VideoDevice *video = current_video; | |
| 319 | |
| 320 /* Erase and update the current mouse position */ | |
| 321 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 322 /* Erase and redraw mouse cursor in new position */ | |
| 323 SDL_LockCursor(); | |
| 324 SDL_EraseCursor(SDL_VideoSurface); | |
| 325 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 326 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 327 SDL_DrawCursor(SDL_VideoSurface); | |
| 328 SDL_UnlockCursor(); | |
| 329 } else if ( video->MoveWMCursor ) { | |
| 330 video->MoveWMCursor(video, x, y); | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 /* Keep track of the current cursor colors */ | |
| 335 static int palette_changed = 1; | |
| 336 static Uint32 pixels8[2]; | |
| 337 | |
| 338 void SDL_CursorPaletteChanged(void) | |
| 339 { | |
| 340 palette_changed = 1; | |
| 341 } | |
| 342 | |
| 343 void SDL_MouseRect(SDL_Rect *area) | |
| 344 { | |
| 345 int clip_diff; | |
| 346 | |
| 347 *area = SDL_cursor->area; | |
| 348 if ( area->x < 0 ) { | |
| 349 area->w += area->x; | |
| 350 area->x = 0; | |
| 351 } | |
| 352 if ( area->y < 0 ) { | |
| 353 area->h += area->y; | |
| 354 area->y = 0; | |
| 355 } | |
| 356 clip_diff = (area->x+area->w)-SDL_VideoSurface->w; | |
| 357 if ( clip_diff > 0 ) { | |
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358 area->w = area->w < clip_diff ? 0 : area->w-clip_diff; |
| 0 | 359 } |
| 360 clip_diff = (area->y+area->h)-SDL_VideoSurface->h; | |
| 361 if ( clip_diff > 0 ) { | |
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362 area->h = area->h < clip_diff ? 0 : area->h-clip_diff; |
| 0 | 363 } |
| 364 } | |
| 365 | |
| 366 static void SDL_DrawCursorFast(SDL_Surface *screen, SDL_Rect *area) | |
| 367 { | |
| 368 const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 }; | |
| 369 int i, w, h; | |
| 370 Uint8 *data, datab; | |
| 371 Uint8 *mask, maskb; | |
| 372 | |
| 373 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 374 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 375 switch (screen->format->BytesPerPixel) { | |
| 376 | |
| 377 case 1: { | |
| 378 Uint8 *dst; | |
| 379 int dstskip; | |
| 380 | |
| 381 if ( palette_changed ) { | |
| 382 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 383 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 384 palette_changed = 0; | |
| 385 } | |
| 386 dst = (Uint8 *)screen->pixels + | |
| 387 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 388 SDL_cursor->area.x; | |
| 389 dstskip = screen->pitch-area->w; | |
| 390 | |
| 391 for ( h=area->h; h; h-- ) { | |
| 392 for ( w=area->w/8; w; w-- ) { | |
| 393 maskb = *mask++; | |
| 394 datab = *data++; | |
| 395 for ( i=0; i<8; ++i ) { | |
| 396 if ( maskb & 0x80 ) { | |
| 397 *dst = pixels8[datab>>7]; | |
| 398 } | |
| 399 maskb <<= 1; | |
| 400 datab <<= 1; | |
| 401 dst++; | |
| 402 } | |
| 403 } | |
| 404 dst += dstskip; | |
| 405 } | |
| 406 } | |
| 407 break; | |
| 408 | |
| 409 case 2: { | |
| 410 Uint16 *dst; | |
| 411 int dstskip; | |
| 412 | |
| 413 dst = (Uint16 *)screen->pixels + | |
| 414 (SDL_cursor->area.y+area->y)*screen->pitch/2 + | |
| 415 SDL_cursor->area.x; | |
| 416 dstskip = (screen->pitch/2)-area->w; | |
| 417 | |
| 418 for ( h=area->h; h; h-- ) { | |
| 419 for ( w=area->w/8; w; w-- ) { | |
| 420 maskb = *mask++; | |
| 421 datab = *data++; | |
| 422 for ( i=0; i<8; ++i ) { | |
| 423 if ( maskb & 0x80 ) { | |
| 424 *dst = pixels[datab>>7]; | |
| 425 } | |
| 426 maskb <<= 1; | |
| 427 datab <<= 1; | |
| 428 dst++; | |
| 429 } | |
| 430 } | |
| 431 dst += dstskip; | |
| 432 } | |
| 433 } | |
| 434 break; | |
| 435 | |
| 436 case 3: { | |
| 437 Uint8 *dst; | |
| 438 int dstskip; | |
| 439 | |
| 440 dst = (Uint8 *)screen->pixels + | |
| 441 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 442 SDL_cursor->area.x*3; | |
| 443 dstskip = screen->pitch-area->w*3; | |
| 444 | |
| 445 for ( h=area->h; h; h-- ) { | |
| 446 for ( w=area->w/8; w; w-- ) { | |
| 447 maskb = *mask++; | |
| 448 datab = *data++; | |
| 449 for ( i=0; i<8; ++i ) { | |
| 450 if ( maskb & 0x80 ) { | |
| 451 memset(dst,pixels[datab>>7],3); | |
| 452 } | |
| 453 maskb <<= 1; | |
| 454 datab <<= 1; | |
| 455 dst += 3; | |
| 456 } | |
| 457 } | |
| 458 dst += dstskip; | |
| 459 } | |
| 460 } | |
| 461 break; | |
| 462 | |
| 463 case 4: { | |
| 464 Uint32 *dst; | |
| 465 int dstskip; | |
| 466 | |
| 467 dst = (Uint32 *)screen->pixels + | |
| 468 (SDL_cursor->area.y+area->y)*screen->pitch/4 + | |
| 469 SDL_cursor->area.x; | |
| 470 dstskip = (screen->pitch/4)-area->w; | |
| 471 | |
| 472 for ( h=area->h; h; h-- ) { | |
| 473 for ( w=area->w/8; w; w-- ) { | |
| 474 maskb = *mask++; | |
| 475 datab = *data++; | |
| 476 for ( i=0; i<8; ++i ) { | |
| 477 if ( maskb & 0x80 ) { | |
| 478 *dst = pixels[datab>>7]; | |
| 479 } | |
| 480 maskb <<= 1; | |
| 481 datab <<= 1; | |
| 482 dst++; | |
| 483 } | |
| 484 } | |
| 485 dst += dstskip; | |
| 486 } | |
| 487 } | |
| 488 break; | |
| 489 } | |
| 490 } | |
| 491 | |
| 492 static void SDL_DrawCursorSlow(SDL_Surface *screen, SDL_Rect *area) | |
| 493 { | |
| 494 const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 }; | |
| 495 int h; | |
| 496 int x, minx, maxx; | |
| 497 Uint8 *data, datab = 0; | |
| 498 Uint8 *mask, maskb = 0; | |
| 499 Uint8 *dst; | |
| 500 int dstbpp, dstskip; | |
| 501 | |
| 502 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 503 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 504 dstbpp = screen->format->BytesPerPixel; | |
| 505 dst = (Uint8 *)screen->pixels + | |
| 506 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 507 SDL_cursor->area.x*dstbpp; | |
| 508 dstskip = screen->pitch-SDL_cursor->area.w*dstbpp; | |
| 509 | |
| 510 minx = area->x; | |
| 511 maxx = area->x+area->w; | |
| 512 if ( screen->format->BytesPerPixel == 1 ) { | |
| 513 if ( palette_changed ) { | |
| 514 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 515 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 516 palette_changed = 0; | |
| 517 } | |
| 518 for ( h=area->h; h; h-- ) { | |
| 519 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 520 if ( (x%8) == 0 ) { | |
| 521 maskb = *mask++; | |
| 522 datab = *data++; | |
| 523 } | |
| 524 if ( (x >= minx) && (x < maxx) ) { | |
| 525 if ( maskb & 0x80 ) { | |
| 526 memset(dst, pixels8[datab>>7], dstbpp); | |
| 527 } | |
| 528 } | |
| 529 maskb <<= 1; | |
| 530 datab <<= 1; | |
| 531 dst += dstbpp; | |
| 532 } | |
| 533 dst += dstskip; | |
| 534 } | |
| 535 } else { | |
| 536 for ( h=area->h; h; h-- ) { | |
| 537 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 538 if ( (x%8) == 0 ) { | |
| 539 maskb = *mask++; | |
| 540 datab = *data++; | |
| 541 } | |
| 542 if ( (x >= minx) && (x < maxx) ) { | |
| 543 if ( maskb & 0x80 ) { | |
| 544 memset(dst, pixels[datab>>7], dstbpp); | |
| 545 } | |
| 546 } | |
| 547 maskb <<= 1; | |
| 548 datab <<= 1; | |
| 549 dst += dstbpp; | |
| 550 } | |
| 551 dst += dstskip; | |
| 552 } | |
| 553 } | |
| 554 } | |
| 555 | |
| 556 /* This handles the ugly work of converting the saved cursor background from | |
| 557 the pixel format of the shadow surface to that of the video surface. | |
| 558 This is only necessary when blitting from a shadow surface of a different | |
| 559 pixel format than the video surface, and using a software rendered cursor. | |
| 560 */ | |
| 561 static void SDL_ConvertCursorSave(SDL_Surface *screen, int w, int h) | |
| 562 { | |
| 563 SDL_BlitInfo info; | |
| 564 SDL_loblit RunBlit; | |
| 565 | |
| 566 /* Make sure we can steal the blit mapping */ | |
| 567 if ( screen->map->dst != SDL_VideoSurface ) { | |
| 568 return; | |
| 569 } | |
| 570 | |
| 571 /* Set up the blit information */ | |
| 572 info.s_pixels = SDL_cursor->save[1]; | |
| 573 info.s_width = w; | |
| 574 info.s_height = h; | |
| 575 info.s_skip = 0; | |
| 576 info.d_pixels = SDL_cursor->save[0]; | |
| 577 info.d_width = w; | |
| 578 info.d_height = h; | |
| 579 info.d_skip = 0; | |
| 580 info.aux_data = screen->map->sw_data->aux_data; | |
| 581 info.src = screen->format; | |
| 582 info.table = screen->map->table; | |
| 583 info.dst = SDL_VideoSurface->format; | |
| 584 RunBlit = screen->map->sw_data->blit; | |
| 585 | |
| 586 /* Run the actual software blit */ | |
| 587 RunBlit(&info); | |
| 588 } | |
| 589 | |
| 590 void SDL_DrawCursorNoLock(SDL_Surface *screen) | |
| 591 { | |
| 592 SDL_Rect area; | |
| 593 | |
| 594 /* Get the mouse rectangle, clipped to the screen */ | |
| 595 SDL_MouseRect(&area); | |
| 596 if ( (area.w == 0) || (area.h == 0) ) { | |
| 597 return; | |
| 598 } | |
| 599 | |
| 600 /* Copy mouse background */ | |
| 601 { int w, h, screenbpp; | |
| 602 Uint8 *src, *dst; | |
| 603 | |
| 604 /* Set up the copy pointers */ | |
| 605 screenbpp = screen->format->BytesPerPixel; | |
| 606 if ( (screen == SDL_VideoSurface) || | |
| 607 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 608 dst = SDL_cursor->save[0]; | |
| 609 } else { | |
| 610 dst = SDL_cursor->save[1]; | |
| 611 } | |
| 612 src = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 613 area.x * screenbpp; | |
| 614 | |
| 615 /* Perform the copy */ | |
| 616 w = area.w*screenbpp; | |
| 617 h = area.h; | |
| 618 while ( h-- ) { | |
| 619 memcpy(dst, src, w); | |
| 620 dst += w; | |
| 621 src += screen->pitch; | |
| 622 } | |
| 623 } | |
| 624 | |
| 625 /* Draw the mouse cursor */ | |
| 626 area.x -= SDL_cursor->area.x; | |
| 627 area.y -= SDL_cursor->area.y; | |
| 628 if ( (area.x == 0) && (area.w == SDL_cursor->area.w) ) { | |
| 629 SDL_DrawCursorFast(screen, &area); | |
| 630 } else { | |
| 631 SDL_DrawCursorSlow(screen, &area); | |
| 632 } | |
| 633 } | |
| 634 | |
| 635 void SDL_DrawCursor(SDL_Surface *screen) | |
| 636 { | |
| 637 /* Lock the screen if necessary */ | |
| 638 if ( screen == NULL ) { | |
| 639 return; | |
| 640 } | |
| 641 if ( SDL_MUSTLOCK(screen) ) { | |
| 642 if ( SDL_LockSurface(screen) < 0 ) { | |
| 643 return; | |
| 644 } | |
| 645 } | |
| 646 | |
| 647 SDL_DrawCursorNoLock(screen); | |
| 648 | |
| 649 /* Unlock the screen and update if necessary */ | |
| 650 if ( SDL_MUSTLOCK(screen) ) { | |
| 651 SDL_UnlockSurface(screen); | |
| 652 } | |
| 653 if ( (screen == SDL_VideoSurface) && | |
| 654 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 655 SDL_VideoDevice *video = current_video; | |
| 656 SDL_VideoDevice *this = current_video; | |
| 657 SDL_Rect area; | |
| 658 | |
| 659 SDL_MouseRect(&area); | |
| 660 | |
| 661 /* This can be called before a video mode is set */ | |
| 662 if ( video->UpdateRects ) { | |
| 663 video->UpdateRects(this, 1, &area); | |
| 664 } | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 void SDL_EraseCursorNoLock(SDL_Surface *screen) | |
| 669 { | |
| 670 SDL_Rect area; | |
| 671 | |
| 672 /* Get the mouse rectangle, clipped to the screen */ | |
| 673 SDL_MouseRect(&area); | |
| 674 if ( (area.w == 0) || (area.h == 0) ) { | |
| 675 return; | |
| 676 } | |
| 677 | |
| 678 /* Copy mouse background */ | |
| 679 { int w, h, screenbpp; | |
| 680 Uint8 *src, *dst; | |
| 681 | |
| 682 /* Set up the copy pointers */ | |
| 683 screenbpp = screen->format->BytesPerPixel; | |
| 684 if ( (screen == SDL_VideoSurface) || | |
| 685 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 686 src = SDL_cursor->save[0]; | |
| 687 } else { | |
| 688 src = SDL_cursor->save[1]; | |
| 689 } | |
| 690 dst = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 691 area.x * screenbpp; | |
| 692 | |
| 693 /* Perform the copy */ | |
| 694 w = area.w*screenbpp; | |
| 695 h = area.h; | |
| 696 while ( h-- ) { | |
| 697 memcpy(dst, src, w); | |
| 698 src += w; | |
| 699 dst += screen->pitch; | |
| 700 } | |
| 701 | |
| 702 /* Perform pixel conversion on cursor background */ | |
| 703 if ( src > SDL_cursor->save[1] ) { | |
| 704 SDL_ConvertCursorSave(screen, area.w, area.h); | |
| 705 } | |
| 706 } | |
| 707 } | |
| 708 | |
| 709 void SDL_EraseCursor(SDL_Surface *screen) | |
| 710 { | |
| 711 /* Lock the screen if necessary */ | |
| 712 if ( screen == NULL ) { | |
| 713 return; | |
| 714 } | |
| 715 if ( SDL_MUSTLOCK(screen) ) { | |
| 716 if ( SDL_LockSurface(screen) < 0 ) { | |
| 717 return; | |
| 718 } | |
| 719 } | |
| 720 | |
| 721 SDL_EraseCursorNoLock(screen); | |
| 722 | |
| 723 /* Unlock the screen and update if necessary */ | |
| 724 if ( SDL_MUSTLOCK(screen) ) { | |
| 725 SDL_UnlockSurface(screen); | |
| 726 } | |
| 727 if ( (screen == SDL_VideoSurface) && | |
| 728 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 729 SDL_VideoDevice *video = current_video; | |
| 730 SDL_VideoDevice *this = current_video; | |
| 731 SDL_Rect area; | |
| 732 | |
| 733 SDL_MouseRect(&area); | |
|
1
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Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
734 if ( video->UpdateRects ) { |
|
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
735 video->UpdateRects(this, 1, &area); |
|
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
736 } |
| 0 | 737 } |
| 738 } | |
| 739 | |
| 740 /* Reset the cursor on video mode change | |
| 741 FIXME: Keep track of all cursors, and reset them all. | |
| 742 */ | |
| 743 void SDL_ResetCursor(void) | |
| 744 { | |
| 745 int savelen; | |
| 746 | |
| 747 if ( SDL_cursor ) { | |
| 748 savelen = SDL_cursor->area.w*4*SDL_cursor->area.h; | |
| 749 SDL_cursor->area.x = 0; | |
| 750 SDL_cursor->area.y = 0; | |
| 751 memset(SDL_cursor->save[0], 0, savelen); | |
| 752 } | |
| 753 } |