Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 1381:8570e1f4b1f1
On FreeBSD, alloca is defined in stdlib.h
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 20 Feb 2006 02:30:15 +0000 |
| parents | 19418e4422cb |
| children | d910939febfa |
| 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_video.h" | |
| 27 #include "SDL_mouse.h" | |
| 28 #include "SDL_blit.h" | |
| 29 #include "SDL_sysvideo.h" | |
| 30 #include "SDL_cursor_c.h" | |
| 31 #include "SDL_pixels_c.h" | |
| 32 #include "default_cursor.h" | |
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33 #include "../events/SDL_sysevents.h" |
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34 #include "../events/SDL_events_c.h" |
| 0 | 35 |
| 36 /* These are static for our cursor handling code */ | |
| 37 volatile int SDL_cursorstate = CURSOR_VISIBLE; | |
| 38 SDL_Cursor *SDL_cursor = NULL; | |
| 39 static SDL_Cursor *SDL_defcursor = NULL; | |
| 40 SDL_mutex *SDL_cursorlock = NULL; | |
| 41 | |
| 42 /* Public functions */ | |
| 43 void SDL_CursorQuit(void) | |
| 44 { | |
| 45 if ( SDL_cursor != NULL ) { | |
| 46 SDL_Cursor *cursor; | |
| 47 | |
| 48 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 49 if ( SDL_cursor != SDL_defcursor ) { | |
| 50 SDL_FreeCursor(SDL_cursor); | |
| 51 } | |
| 52 SDL_cursor = NULL; | |
| 53 if ( SDL_defcursor != NULL ) { | |
| 54 cursor = SDL_defcursor; | |
| 55 SDL_defcursor = NULL; | |
| 56 SDL_FreeCursor(cursor); | |
| 57 } | |
| 58 } | |
| 59 if ( SDL_cursorlock != NULL ) { | |
| 60 SDL_DestroyMutex(SDL_cursorlock); | |
| 61 SDL_cursorlock = NULL; | |
| 62 } | |
| 63 } | |
| 64 int SDL_CursorInit(Uint32 multithreaded) | |
| 65 { | |
| 66 /* We don't have mouse focus, and the cursor isn't drawn yet */ | |
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67 #ifndef IPOD |
| 0 | 68 SDL_cursorstate = CURSOR_VISIBLE; |
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69 #endif |
| 0 | 70 |
| 71 /* Create the default cursor */ | |
| 72 if ( SDL_defcursor == NULL ) { | |
| 73 SDL_defcursor = SDL_CreateCursor(default_cdata, default_cmask, | |
| 74 DEFAULT_CWIDTH, DEFAULT_CHEIGHT, | |
| 75 DEFAULT_CHOTX, DEFAULT_CHOTY); | |
| 76 SDL_SetCursor(SDL_defcursor); | |
| 77 } | |
| 78 | |
| 79 /* Create a lock if necessary */ | |
| 80 if ( multithreaded ) { | |
| 81 SDL_cursorlock = SDL_CreateMutex(); | |
| 82 } | |
| 83 | |
| 84 /* That's it! */ | |
| 85 return(0); | |
| 86 } | |
| 87 | |
| 88 /* Multi-thread support for cursors */ | |
| 89 #ifndef SDL_LockCursor | |
| 90 void SDL_LockCursor(void) | |
| 91 { | |
| 92 if ( SDL_cursorlock ) { | |
| 93 SDL_mutexP(SDL_cursorlock); | |
| 94 } | |
| 95 } | |
| 96 #endif | |
| 97 #ifndef SDL_UnlockCursor | |
| 98 void SDL_UnlockCursor(void) | |
| 99 { | |
| 100 if ( SDL_cursorlock ) { | |
| 101 SDL_mutexV(SDL_cursorlock); | |
| 102 } | |
| 103 } | |
| 104 #endif | |
| 105 | |
| 106 /* Software cursor drawing support */ | |
| 107 SDL_Cursor * SDL_CreateCursor (Uint8 *data, Uint8 *mask, | |
| 108 int w, int h, int hot_x, int hot_y) | |
| 109 { | |
| 110 SDL_VideoDevice *video = current_video; | |
| 111 int savelen; | |
| 112 int i; | |
| 113 SDL_Cursor *cursor; | |
| 114 | |
| 115 /* Make sure the width is a multiple of 8 */ | |
| 116 w = ((w+7)&~7); | |
| 117 | |
| 118 /* Sanity check the hot spot */ | |
| 119 if ( (hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h) ) { | |
| 120 SDL_SetError("Cursor hot spot doesn't lie within cursor"); | |
| 121 return(NULL); | |
| 122 } | |
| 123 | |
| 124 /* Allocate memory for the cursor */ | |
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125 cursor = (SDL_Cursor *)SDL_malloc(sizeof *cursor); |
| 0 | 126 if ( cursor == NULL ) { |
| 127 SDL_OutOfMemory(); | |
| 128 return(NULL); | |
| 129 } | |
| 130 savelen = (w*4)*h; | |
| 131 cursor->area.x = 0; | |
| 132 cursor->area.y = 0; | |
| 133 cursor->area.w = w; | |
| 134 cursor->area.h = h; | |
| 135 cursor->hot_x = hot_x; | |
| 136 cursor->hot_y = hot_y; | |
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137 cursor->data = (Uint8 *)SDL_malloc((w/8)*h*2); |
| 0 | 138 cursor->mask = cursor->data+((w/8)*h); |
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139 cursor->save[0] = (Uint8 *)SDL_malloc(savelen*2); |
| 0 | 140 cursor->save[1] = cursor->save[0] + savelen; |
| 141 cursor->wm_cursor = NULL; | |
| 142 if ( ! cursor->data || ! cursor->save[0] ) { | |
| 143 SDL_FreeCursor(cursor); | |
| 144 SDL_OutOfMemory(); | |
| 145 return(NULL); | |
| 146 } | |
| 147 for ( i=((w/8)*h)-1; i>=0; --i ) { | |
| 148 cursor->data[i] = data[i]; | |
| 149 cursor->mask[i] = mask[i] | data[i]; | |
| 150 } | |
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151 SDL_memset(cursor->save[0], 0, savelen*2); |
| 0 | 152 |
| 153 /* If the window manager gives us a good cursor, we're done! */ | |
| 154 if ( video->CreateWMCursor ) { | |
| 155 cursor->wm_cursor = video->CreateWMCursor(video, data, mask, | |
| 156 w, h, hot_x, hot_y); | |
| 157 } else { | |
| 158 cursor->wm_cursor = NULL; | |
| 159 } | |
| 160 return(cursor); | |
| 161 } | |
| 162 | |
| 163 /* SDL_SetCursor(NULL) can be used to force the cursor redraw, | |
| 164 if this is desired for any reason. This is used when setting | |
| 165 the video mode and when the SDL window gains the mouse focus. | |
| 166 */ | |
| 167 void SDL_SetCursor (SDL_Cursor *cursor) | |
| 168 { | |
| 169 SDL_VideoDevice *video = current_video; | |
| 170 SDL_VideoDevice *this = current_video; | |
| 171 | |
| 172 /* Make sure that the video subsystem has been initialized */ | |
| 173 if ( ! video ) { | |
| 174 return; | |
| 175 } | |
| 176 | |
| 177 /* Prevent the event thread from moving the mouse */ | |
| 178 SDL_LockCursor(); | |
| 179 | |
| 180 /* Set the new cursor */ | |
| 181 if ( cursor && (cursor != SDL_cursor) ) { | |
| 182 /* Erase the current mouse position */ | |
| 183 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 184 SDL_EraseCursor(SDL_VideoSurface); | |
| 185 } else if ( video->MoveWMCursor ) { | |
| 186 /* If the video driver is moving the cursor directly, | |
| 187 it needs to hide the old cursor before (possibly) | |
| 188 showing the new one. (But don't erase NULL cursor) | |
| 189 */ | |
| 190 if ( SDL_cursor ) { | |
| 191 video->ShowWMCursor(this, NULL); | |
| 192 } | |
| 193 } | |
| 194 SDL_cursor = cursor; | |
| 195 } | |
| 196 | |
| 197 /* Draw the new mouse cursor */ | |
| 198 if ( SDL_cursor && (SDL_cursorstate&CURSOR_VISIBLE) ) { | |
| 199 /* Use window manager cursor if possible */ | |
| 200 if ( SDL_cursor->wm_cursor && | |
| 1296 | 201 video->ShowWMCursor(this, SDL_cursor->wm_cursor) ) { |
| 0 | 202 SDL_cursorstate &= ~CURSOR_USINGSW; |
| 1296 | 203 } else { |
| 0 | 204 SDL_cursorstate |= CURSOR_USINGSW; |
| 205 if ( video->ShowWMCursor ) { | |
| 206 video->ShowWMCursor(this, NULL); | |
| 207 } | |
| 208 { int x, y; | |
| 209 SDL_GetMouseState(&x, &y); | |
| 210 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 211 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 212 } | |
| 213 SDL_DrawCursor(SDL_VideoSurface); | |
| 214 } | |
| 215 } else { | |
| 216 /* Erase window manager mouse (cursor not visible) */ | |
| 217 if ( SDL_cursor && (SDL_cursorstate & CURSOR_USINGSW) ) { | |
| 218 SDL_EraseCursor(SDL_VideoSurface); | |
| 219 } else { | |
| 220 if ( video ) { | |
| 221 video->ShowWMCursor(this, NULL); | |
| 222 } | |
| 223 } | |
| 224 } | |
| 225 SDL_UnlockCursor(); | |
| 226 } | |
| 227 | |
| 228 SDL_Cursor * SDL_GetCursor (void) | |
| 229 { | |
| 230 return(SDL_cursor); | |
| 231 } | |
| 232 | |
| 233 void SDL_FreeCursor (SDL_Cursor *cursor) | |
| 234 { | |
| 235 if ( cursor ) { | |
| 236 if ( cursor == SDL_cursor ) { | |
| 237 SDL_SetCursor(SDL_defcursor); | |
| 238 } | |
| 239 if ( cursor != SDL_defcursor ) { | |
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240 SDL_VideoDevice *video = current_video; |
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241 SDL_VideoDevice *this = current_video; |
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242 |
| 0 | 243 if ( cursor->data ) { |
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244 SDL_free(cursor->data); |
| 0 | 245 } |
| 246 if ( cursor->save[0] ) { | |
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247 SDL_free(cursor->save[0]); |
| 0 | 248 } |
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249 if ( video && cursor->wm_cursor ) { |
| 0 | 250 video->FreeWMCursor(this, cursor->wm_cursor); |
| 251 } | |
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252 SDL_free(cursor); |
| 0 | 253 } |
| 254 } | |
| 255 } | |
| 256 | |
| 257 int SDL_ShowCursor (int toggle) | |
| 258 { | |
| 259 int showing; | |
| 260 | |
| 261 showing = (SDL_cursorstate & CURSOR_VISIBLE); | |
| 262 if ( toggle >= 0 ) { | |
| 263 SDL_LockCursor(); | |
| 264 if ( toggle ) { | |
| 265 SDL_cursorstate |= CURSOR_VISIBLE; | |
| 266 } else { | |
| 267 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 268 } | |
| 269 SDL_UnlockCursor(); | |
| 270 if ( (SDL_cursorstate & CURSOR_VISIBLE) != showing ) { | |
| 271 SDL_VideoDevice *video = current_video; | |
| 272 SDL_VideoDevice *this = current_video; | |
| 273 | |
| 274 SDL_SetCursor(NULL); | |
| 275 if ( video && video->CheckMouseMode ) { | |
| 276 video->CheckMouseMode(this); | |
| 277 } | |
| 278 } | |
| 279 } else { | |
| 280 /* Query current state */ ; | |
| 281 } | |
| 282 return(showing ? 1 : 0); | |
| 283 } | |
| 284 | |
| 285 void SDL_WarpMouse (Uint16 x, Uint16 y) | |
| 286 { | |
| 287 SDL_VideoDevice *video = current_video; | |
| 288 SDL_VideoDevice *this = current_video; | |
| 289 | |
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290 if ( !video || !SDL_PublicSurface ) { |
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291 SDL_SetError("A video mode must be set before warping mouse"); |
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292 return; |
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293 } |
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294 |
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295 /* If we have an offset video mode, offset the mouse coordinates */ |
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296 if (this->screen->pitch == 0) { |
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297 x += this->screen->offset / this->screen->format->BytesPerPixel; |
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298 y += this->screen->offset; |
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299 } else { |
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300 x += (this->screen->offset % this->screen->pitch) / |
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301 this->screen->format->BytesPerPixel; |
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302 y += (this->screen->offset / this->screen->pitch); |
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303 } |
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304 |
| 0 | 305 /* This generates a mouse motion event */ |
| 306 if ( video->WarpWMCursor ) { | |
| 307 video->WarpWMCursor(this, x, y); | |
| 308 } else { | |
| 309 SDL_PrivateMouseMotion(0, 0, x, y); | |
| 310 } | |
| 311 } | |
| 312 | |
| 313 void SDL_MoveCursor(int x, int y) | |
| 314 { | |
| 315 SDL_VideoDevice *video = current_video; | |
| 316 | |
| 317 /* Erase and update the current mouse position */ | |
| 318 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 319 /* Erase and redraw mouse cursor in new position */ | |
| 320 SDL_LockCursor(); | |
| 321 SDL_EraseCursor(SDL_VideoSurface); | |
| 322 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 323 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 324 SDL_DrawCursor(SDL_VideoSurface); | |
| 325 SDL_UnlockCursor(); | |
| 326 } else if ( video->MoveWMCursor ) { | |
| 327 video->MoveWMCursor(video, x, y); | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 /* Keep track of the current cursor colors */ | |
| 332 static int palette_changed = 1; | |
| 333 static Uint32 pixels8[2]; | |
| 334 | |
| 335 void SDL_CursorPaletteChanged(void) | |
| 336 { | |
| 337 palette_changed = 1; | |
| 338 } | |
| 339 | |
| 340 void SDL_MouseRect(SDL_Rect *area) | |
| 341 { | |
| 342 int clip_diff; | |
| 343 | |
| 344 *area = SDL_cursor->area; | |
| 345 if ( area->x < 0 ) { | |
| 346 area->w += area->x; | |
| 347 area->x = 0; | |
| 348 } | |
| 349 if ( area->y < 0 ) { | |
| 350 area->h += area->y; | |
| 351 area->y = 0; | |
| 352 } | |
| 353 clip_diff = (area->x+area->w)-SDL_VideoSurface->w; | |
| 354 if ( clip_diff > 0 ) { | |
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355 area->w = area->w < clip_diff ? 0 : area->w-clip_diff; |
| 0 | 356 } |
| 357 clip_diff = (area->y+area->h)-SDL_VideoSurface->h; | |
| 358 if ( clip_diff > 0 ) { | |
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359 area->h = area->h < clip_diff ? 0 : area->h-clip_diff; |
| 0 | 360 } |
| 361 } | |
| 362 | |
| 363 static void SDL_DrawCursorFast(SDL_Surface *screen, SDL_Rect *area) | |
| 364 { | |
| 365 const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 }; | |
| 366 int i, w, h; | |
| 367 Uint8 *data, datab; | |
| 368 Uint8 *mask, maskb; | |
| 369 | |
| 370 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 371 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 372 switch (screen->format->BytesPerPixel) { | |
| 373 | |
| 374 case 1: { | |
| 375 Uint8 *dst; | |
| 376 int dstskip; | |
| 377 | |
| 378 if ( palette_changed ) { | |
| 379 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 380 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 381 palette_changed = 0; | |
| 382 } | |
| 383 dst = (Uint8 *)screen->pixels + | |
| 384 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 385 SDL_cursor->area.x; | |
| 386 dstskip = screen->pitch-area->w; | |
| 387 | |
| 388 for ( h=area->h; h; h-- ) { | |
| 389 for ( w=area->w/8; w; w-- ) { | |
| 390 maskb = *mask++; | |
| 391 datab = *data++; | |
| 392 for ( i=0; i<8; ++i ) { | |
| 393 if ( maskb & 0x80 ) { | |
| 394 *dst = pixels8[datab>>7]; | |
| 395 } | |
| 396 maskb <<= 1; | |
| 397 datab <<= 1; | |
| 398 dst++; | |
| 399 } | |
| 400 } | |
| 401 dst += dstskip; | |
| 402 } | |
| 403 } | |
| 404 break; | |
| 405 | |
| 406 case 2: { | |
| 407 Uint16 *dst; | |
| 408 int dstskip; | |
| 409 | |
| 410 dst = (Uint16 *)screen->pixels + | |
| 411 (SDL_cursor->area.y+area->y)*screen->pitch/2 + | |
| 412 SDL_cursor->area.x; | |
| 413 dstskip = (screen->pitch/2)-area->w; | |
| 414 | |
| 415 for ( h=area->h; h; h-- ) { | |
| 416 for ( w=area->w/8; w; w-- ) { | |
| 417 maskb = *mask++; | |
| 418 datab = *data++; | |
| 419 for ( i=0; i<8; ++i ) { | |
| 420 if ( maskb & 0x80 ) { | |
| 421 *dst = pixels[datab>>7]; | |
| 422 } | |
| 423 maskb <<= 1; | |
| 424 datab <<= 1; | |
| 425 dst++; | |
| 426 } | |
| 427 } | |
| 428 dst += dstskip; | |
| 429 } | |
| 430 } | |
| 431 break; | |
| 432 | |
| 433 case 3: { | |
| 434 Uint8 *dst; | |
| 435 int dstskip; | |
| 436 | |
| 437 dst = (Uint8 *)screen->pixels + | |
| 438 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 439 SDL_cursor->area.x*3; | |
| 440 dstskip = screen->pitch-area->w*3; | |
| 441 | |
| 442 for ( h=area->h; h; h-- ) { | |
| 443 for ( w=area->w/8; w; w-- ) { | |
| 444 maskb = *mask++; | |
| 445 datab = *data++; | |
| 446 for ( i=0; i<8; ++i ) { | |
| 447 if ( maskb & 0x80 ) { | |
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448 SDL_memset(dst,pixels[datab>>7],3); |
| 0 | 449 } |
| 450 maskb <<= 1; | |
| 451 datab <<= 1; | |
| 452 dst += 3; | |
| 453 } | |
| 454 } | |
| 455 dst += dstskip; | |
| 456 } | |
| 457 } | |
| 458 break; | |
| 459 | |
| 460 case 4: { | |
| 461 Uint32 *dst; | |
| 462 int dstskip; | |
| 463 | |
| 464 dst = (Uint32 *)screen->pixels + | |
| 465 (SDL_cursor->area.y+area->y)*screen->pitch/4 + | |
| 466 SDL_cursor->area.x; | |
| 467 dstskip = (screen->pitch/4)-area->w; | |
| 468 | |
| 469 for ( h=area->h; h; h-- ) { | |
| 470 for ( w=area->w/8; w; w-- ) { | |
| 471 maskb = *mask++; | |
| 472 datab = *data++; | |
| 473 for ( i=0; i<8; ++i ) { | |
| 474 if ( maskb & 0x80 ) { | |
| 475 *dst = pixels[datab>>7]; | |
| 476 } | |
| 477 maskb <<= 1; | |
| 478 datab <<= 1; | |
| 479 dst++; | |
| 480 } | |
| 481 } | |
| 482 dst += dstskip; | |
| 483 } | |
| 484 } | |
| 485 break; | |
| 486 } | |
| 487 } | |
| 488 | |
| 489 static void SDL_DrawCursorSlow(SDL_Surface *screen, SDL_Rect *area) | |
| 490 { | |
| 491 const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 }; | |
| 492 int h; | |
| 493 int x, minx, maxx; | |
| 494 Uint8 *data, datab = 0; | |
| 495 Uint8 *mask, maskb = 0; | |
| 496 Uint8 *dst; | |
| 497 int dstbpp, dstskip; | |
| 498 | |
| 499 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 500 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 501 dstbpp = screen->format->BytesPerPixel; | |
| 502 dst = (Uint8 *)screen->pixels + | |
| 503 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 504 SDL_cursor->area.x*dstbpp; | |
| 505 dstskip = screen->pitch-SDL_cursor->area.w*dstbpp; | |
| 506 | |
| 507 minx = area->x; | |
| 508 maxx = area->x+area->w; | |
| 509 if ( screen->format->BytesPerPixel == 1 ) { | |
| 510 if ( palette_changed ) { | |
| 511 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 512 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 513 palette_changed = 0; | |
| 514 } | |
| 515 for ( h=area->h; h; h-- ) { | |
| 516 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 517 if ( (x%8) == 0 ) { | |
| 518 maskb = *mask++; | |
| 519 datab = *data++; | |
| 520 } | |
| 521 if ( (x >= minx) && (x < maxx) ) { | |
| 522 if ( maskb & 0x80 ) { | |
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523 SDL_memset(dst, pixels8[datab>>7], dstbpp); |
| 0 | 524 } |
| 525 } | |
| 526 maskb <<= 1; | |
| 527 datab <<= 1; | |
| 528 dst += dstbpp; | |
| 529 } | |
| 530 dst += dstskip; | |
| 531 } | |
| 532 } else { | |
| 533 for ( h=area->h; h; h-- ) { | |
| 534 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 535 if ( (x%8) == 0 ) { | |
| 536 maskb = *mask++; | |
| 537 datab = *data++; | |
| 538 } | |
| 539 if ( (x >= minx) && (x < maxx) ) { | |
| 540 if ( maskb & 0x80 ) { | |
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541 SDL_memset(dst, pixels[datab>>7], dstbpp); |
| 0 | 542 } |
| 543 } | |
| 544 maskb <<= 1; | |
| 545 datab <<= 1; | |
| 546 dst += dstbpp; | |
| 547 } | |
| 548 dst += dstskip; | |
| 549 } | |
| 550 } | |
| 551 } | |
| 552 | |
| 553 /* This handles the ugly work of converting the saved cursor background from | |
| 554 the pixel format of the shadow surface to that of the video surface. | |
| 555 This is only necessary when blitting from a shadow surface of a different | |
| 556 pixel format than the video surface, and using a software rendered cursor. | |
| 557 */ | |
| 558 static void SDL_ConvertCursorSave(SDL_Surface *screen, int w, int h) | |
| 559 { | |
| 560 SDL_BlitInfo info; | |
| 561 SDL_loblit RunBlit; | |
| 562 | |
| 563 /* Make sure we can steal the blit mapping */ | |
| 564 if ( screen->map->dst != SDL_VideoSurface ) { | |
| 565 return; | |
| 566 } | |
| 567 | |
| 568 /* Set up the blit information */ | |
| 569 info.s_pixels = SDL_cursor->save[1]; | |
| 570 info.s_width = w; | |
| 571 info.s_height = h; | |
| 572 info.s_skip = 0; | |
| 573 info.d_pixels = SDL_cursor->save[0]; | |
| 574 info.d_width = w; | |
| 575 info.d_height = h; | |
| 576 info.d_skip = 0; | |
| 577 info.aux_data = screen->map->sw_data->aux_data; | |
| 578 info.src = screen->format; | |
| 579 info.table = screen->map->table; | |
| 580 info.dst = SDL_VideoSurface->format; | |
| 581 RunBlit = screen->map->sw_data->blit; | |
| 582 | |
| 583 /* Run the actual software blit */ | |
| 584 RunBlit(&info); | |
| 585 } | |
| 586 | |
| 587 void SDL_DrawCursorNoLock(SDL_Surface *screen) | |
| 588 { | |
| 589 SDL_Rect area; | |
| 590 | |
| 591 /* Get the mouse rectangle, clipped to the screen */ | |
| 592 SDL_MouseRect(&area); | |
| 593 if ( (area.w == 0) || (area.h == 0) ) { | |
| 594 return; | |
| 595 } | |
| 596 | |
| 597 /* Copy mouse background */ | |
| 598 { int w, h, screenbpp; | |
| 599 Uint8 *src, *dst; | |
| 600 | |
| 601 /* Set up the copy pointers */ | |
| 602 screenbpp = screen->format->BytesPerPixel; | |
| 603 if ( (screen == SDL_VideoSurface) || | |
| 604 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 605 dst = SDL_cursor->save[0]; | |
| 606 } else { | |
| 607 dst = SDL_cursor->save[1]; | |
| 608 } | |
| 609 src = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 610 area.x * screenbpp; | |
| 611 | |
| 612 /* Perform the copy */ | |
| 613 w = area.w*screenbpp; | |
| 614 h = area.h; | |
| 615 while ( h-- ) { | |
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changeset
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616 SDL_memcpy(dst, src, w); |
| 0 | 617 dst += w; |
| 618 src += screen->pitch; | |
| 619 } | |
| 620 } | |
| 621 | |
| 622 /* Draw the mouse cursor */ | |
| 623 area.x -= SDL_cursor->area.x; | |
| 624 area.y -= SDL_cursor->area.y; | |
| 625 if ( (area.x == 0) && (area.w == SDL_cursor->area.w) ) { | |
| 626 SDL_DrawCursorFast(screen, &area); | |
| 627 } else { | |
| 628 SDL_DrawCursorSlow(screen, &area); | |
| 629 } | |
| 630 } | |
| 631 | |
| 632 void SDL_DrawCursor(SDL_Surface *screen) | |
| 633 { | |
| 634 /* Lock the screen if necessary */ | |
| 635 if ( screen == NULL ) { | |
| 636 return; | |
| 637 } | |
| 638 if ( SDL_MUSTLOCK(screen) ) { | |
| 639 if ( SDL_LockSurface(screen) < 0 ) { | |
| 640 return; | |
| 641 } | |
| 642 } | |
| 643 | |
| 644 SDL_DrawCursorNoLock(screen); | |
| 645 | |
| 646 /* Unlock the screen and update if necessary */ | |
| 647 if ( SDL_MUSTLOCK(screen) ) { | |
| 648 SDL_UnlockSurface(screen); | |
| 649 } | |
| 650 if ( (screen == SDL_VideoSurface) && | |
| 651 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 652 SDL_VideoDevice *video = current_video; | |
| 653 SDL_VideoDevice *this = current_video; | |
| 654 SDL_Rect area; | |
| 655 | |
| 656 SDL_MouseRect(&area); | |
| 657 | |
| 658 /* This can be called before a video mode is set */ | |
| 659 if ( video->UpdateRects ) { | |
| 660 video->UpdateRects(this, 1, &area); | |
| 661 } | |
| 662 } | |
| 663 } | |
| 664 | |
| 665 void SDL_EraseCursorNoLock(SDL_Surface *screen) | |
| 666 { | |
| 667 SDL_Rect area; | |
| 668 | |
| 669 /* Get the mouse rectangle, clipped to the screen */ | |
| 670 SDL_MouseRect(&area); | |
| 671 if ( (area.w == 0) || (area.h == 0) ) { | |
| 672 return; | |
| 673 } | |
| 674 | |
| 675 /* Copy mouse background */ | |
| 676 { int w, h, screenbpp; | |
| 677 Uint8 *src, *dst; | |
| 678 | |
| 679 /* Set up the copy pointers */ | |
| 680 screenbpp = screen->format->BytesPerPixel; | |
| 681 if ( (screen == SDL_VideoSurface) || | |
| 682 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 683 src = SDL_cursor->save[0]; | |
| 684 } else { | |
| 685 src = SDL_cursor->save[1]; | |
| 686 } | |
| 687 dst = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 688 area.x * screenbpp; | |
| 689 | |
| 690 /* Perform the copy */ | |
| 691 w = area.w*screenbpp; | |
| 692 h = area.h; | |
| 693 while ( h-- ) { | |
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changeset
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694 SDL_memcpy(dst, src, w); |
| 0 | 695 src += w; |
| 696 dst += screen->pitch; | |
| 697 } | |
| 698 | |
| 699 /* Perform pixel conversion on cursor background */ | |
| 700 if ( src > SDL_cursor->save[1] ) { | |
| 701 SDL_ConvertCursorSave(screen, area.w, area.h); | |
| 702 } | |
| 703 } | |
| 704 } | |
| 705 | |
| 706 void SDL_EraseCursor(SDL_Surface *screen) | |
| 707 { | |
| 708 /* Lock the screen if necessary */ | |
| 709 if ( screen == NULL ) { | |
| 710 return; | |
| 711 } | |
| 712 if ( SDL_MUSTLOCK(screen) ) { | |
| 713 if ( SDL_LockSurface(screen) < 0 ) { | |
| 714 return; | |
| 715 } | |
| 716 } | |
| 717 | |
| 718 SDL_EraseCursorNoLock(screen); | |
| 719 | |
| 720 /* Unlock the screen and update if necessary */ | |
| 721 if ( SDL_MUSTLOCK(screen) ) { | |
| 722 SDL_UnlockSurface(screen); | |
| 723 } | |
| 724 if ( (screen == SDL_VideoSurface) && | |
| 725 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 726 SDL_VideoDevice *video = current_video; | |
| 727 SDL_VideoDevice *this = current_video; | |
| 728 SDL_Rect area; | |
| 729 | |
| 730 SDL_MouseRect(&area); | |
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731 if ( video->UpdateRects ) { |
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732 video->UpdateRects(this, 1, &area); |
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|
733 } |
| 0 | 734 } |
| 735 } | |
| 736 | |
| 737 /* Reset the cursor on video mode change | |
| 738 FIXME: Keep track of all cursors, and reset them all. | |
| 739 */ | |
| 740 void SDL_ResetCursor(void) | |
| 741 { | |
| 742 int savelen; | |
| 743 | |
| 744 if ( SDL_cursor ) { | |
| 745 savelen = SDL_cursor->area.w*4*SDL_cursor->area.h; | |
| 746 SDL_cursor->area.x = 0; | |
| 747 SDL_cursor->area.y = 0; | |
|
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|
748 SDL_memset(SDL_cursor->save[0], 0, savelen); |
| 0 | 749 } |
| 750 } |