Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 1643:51038e80ae59
More general fix for bug #189
The clipping is done at a higher level, and the low level functions are
passed clipped rectangles. Drivers which don't support source clipping
have not been changed, so the image will be squished instead of clipped,
but at least they will no longer crash when the destination rect was out
of bounds.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 17 Apr 2006 06:47:23 +0000 |
| parents | 5f52867ba65c |
| children | 782fd950bd46 37dab4a917c4 |
| 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 */ |
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22 #include "SDL_config.h" |
| 0 | 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" | |
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34 #include "../events/SDL_sysevents.h" |
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35 #include "../events/SDL_events_c.h" |
| 0 | 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 */ | |
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68 #ifndef IPOD |
| 0 | 69 SDL_cursorstate = CURSOR_VISIBLE; |
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70 #endif |
| 0 | 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 */ | |
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126 cursor = (SDL_Cursor *)SDL_malloc(sizeof *cursor); |
| 0 | 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; | |
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138 cursor->data = (Uint8 *)SDL_malloc((w/8)*h*2); |
| 0 | 139 cursor->mask = cursor->data+((w/8)*h); |
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140 cursor->save[0] = (Uint8 *)SDL_malloc(savelen*2); |
| 0 | 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 } | |
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152 SDL_memset(cursor->save[0], 0, savelen*2); |
| 0 | 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 ) { | |
| 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 if ( SDL_cursor->wm_cursor && | |
| 1296 | 202 video->ShowWMCursor(this, SDL_cursor->wm_cursor) ) { |
| 0 | 203 SDL_cursorstate &= ~CURSOR_USINGSW; |
| 1296 | 204 } else { |
| 0 | 205 SDL_cursorstate |= CURSOR_USINGSW; |
| 206 if ( video->ShowWMCursor ) { | |
| 207 video->ShowWMCursor(this, NULL); | |
| 208 } | |
| 209 { int x, y; | |
| 210 SDL_GetMouseState(&x, &y); | |
| 211 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 212 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 213 } | |
| 214 SDL_DrawCursor(SDL_VideoSurface); | |
| 215 } | |
| 216 } else { | |
| 217 /* Erase window manager mouse (cursor not visible) */ | |
| 218 if ( SDL_cursor && (SDL_cursorstate & CURSOR_USINGSW) ) { | |
| 219 SDL_EraseCursor(SDL_VideoSurface); | |
| 220 } else { | |
| 221 if ( video ) { | |
| 222 video->ShowWMCursor(this, NULL); | |
| 223 } | |
| 224 } | |
| 225 } | |
| 226 SDL_UnlockCursor(); | |
| 227 } | |
| 228 | |
| 229 SDL_Cursor * SDL_GetCursor (void) | |
| 230 { | |
| 231 return(SDL_cursor); | |
| 232 } | |
| 233 | |
| 234 void SDL_FreeCursor (SDL_Cursor *cursor) | |
| 235 { | |
| 236 if ( cursor ) { | |
| 237 if ( cursor == SDL_cursor ) { | |
| 238 SDL_SetCursor(SDL_defcursor); | |
| 239 } | |
| 240 if ( cursor != SDL_defcursor ) { | |
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241 SDL_VideoDevice *video = current_video; |
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242 SDL_VideoDevice *this = current_video; |
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243 |
| 0 | 244 if ( cursor->data ) { |
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245 SDL_free(cursor->data); |
| 0 | 246 } |
| 247 if ( cursor->save[0] ) { | |
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248 SDL_free(cursor->save[0]); |
| 0 | 249 } |
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250 if ( video && cursor->wm_cursor ) { |
| 0 | 251 video->FreeWMCursor(this, cursor->wm_cursor); |
| 252 } | |
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253 SDL_free(cursor); |
| 0 | 254 } |
| 255 } | |
| 256 } | |
| 257 | |
| 258 int SDL_ShowCursor (int toggle) | |
| 259 { | |
| 260 int showing; | |
| 261 | |
| 262 showing = (SDL_cursorstate & CURSOR_VISIBLE); | |
| 263 if ( toggle >= 0 ) { | |
| 264 SDL_LockCursor(); | |
| 265 if ( toggle ) { | |
| 266 SDL_cursorstate |= CURSOR_VISIBLE; | |
| 267 } else { | |
| 268 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 269 } | |
| 270 SDL_UnlockCursor(); | |
| 271 if ( (SDL_cursorstate & CURSOR_VISIBLE) != showing ) { | |
| 272 SDL_VideoDevice *video = current_video; | |
| 273 SDL_VideoDevice *this = current_video; | |
| 274 | |
| 275 SDL_SetCursor(NULL); | |
| 276 if ( video && video->CheckMouseMode ) { | |
| 277 video->CheckMouseMode(this); | |
| 278 } | |
| 279 } | |
| 280 } else { | |
| 281 /* Query current state */ ; | |
| 282 } | |
| 283 return(showing ? 1 : 0); | |
| 284 } | |
| 285 | |
| 286 void SDL_WarpMouse (Uint16 x, Uint16 y) | |
| 287 { | |
| 288 SDL_VideoDevice *video = current_video; | |
| 289 SDL_VideoDevice *this = current_video; | |
| 290 | |
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291 if ( !video || !SDL_PublicSurface ) { |
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292 SDL_SetError("A video mode must be set before warping mouse"); |
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293 return; |
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294 } |
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295 |
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296 /* If we have an offset video mode, offset the mouse coordinates */ |
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297 if (this->screen->pitch == 0) { |
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298 x += this->screen->offset / this->screen->format->BytesPerPixel; |
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299 y += this->screen->offset; |
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300 } else { |
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301 x += (this->screen->offset % this->screen->pitch) / |
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302 this->screen->format->BytesPerPixel; |
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303 y += (this->screen->offset / this->screen->pitch); |
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304 } |
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305 |
| 0 | 306 /* This generates a mouse motion event */ |
| 307 if ( video->WarpWMCursor ) { | |
| 308 video->WarpWMCursor(this, x, y); | |
| 309 } else { | |
| 310 SDL_PrivateMouseMotion(0, 0, x, y); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 void SDL_MoveCursor(int x, int y) | |
| 315 { | |
| 316 SDL_VideoDevice *video = current_video; | |
| 317 | |
| 318 /* Erase and update the current mouse position */ | |
| 319 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 320 /* Erase and redraw mouse cursor in new position */ | |
| 321 SDL_LockCursor(); | |
| 322 SDL_EraseCursor(SDL_VideoSurface); | |
| 323 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 324 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 325 SDL_DrawCursor(SDL_VideoSurface); | |
| 326 SDL_UnlockCursor(); | |
| 327 } else if ( video->MoveWMCursor ) { | |
| 328 video->MoveWMCursor(video, x, y); | |
| 329 } | |
| 330 } | |
| 331 | |
| 332 /* Keep track of the current cursor colors */ | |
| 333 static int palette_changed = 1; | |
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334 static Uint8 pixels8[2]; |
| 0 | 335 |
| 336 void SDL_CursorPaletteChanged(void) | |
| 337 { | |
| 338 palette_changed = 1; | |
| 339 } | |
| 340 | |
| 341 void SDL_MouseRect(SDL_Rect *area) | |
| 342 { | |
| 343 int clip_diff; | |
| 344 | |
| 345 *area = SDL_cursor->area; | |
| 346 if ( area->x < 0 ) { | |
| 347 area->w += area->x; | |
| 348 area->x = 0; | |
| 349 } | |
| 350 if ( area->y < 0 ) { | |
| 351 area->h += area->y; | |
| 352 area->y = 0; | |
| 353 } | |
| 354 clip_diff = (area->x+area->w)-SDL_VideoSurface->w; | |
| 355 if ( clip_diff > 0 ) { | |
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356 area->w = area->w < clip_diff ? 0 : area->w-clip_diff; |
| 0 | 357 } |
| 358 clip_diff = (area->y+area->h)-SDL_VideoSurface->h; | |
| 359 if ( clip_diff > 0 ) { | |
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360 area->h = area->h < clip_diff ? 0 : area->h-clip_diff; |
| 0 | 361 } |
| 362 } | |
| 363 | |
| 364 static void SDL_DrawCursorFast(SDL_Surface *screen, SDL_Rect *area) | |
| 365 { | |
| 366 const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 }; | |
| 367 int i, w, h; | |
| 368 Uint8 *data, datab; | |
| 369 Uint8 *mask, maskb; | |
| 370 | |
| 371 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 372 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 373 switch (screen->format->BytesPerPixel) { | |
| 374 | |
| 375 case 1: { | |
| 376 Uint8 *dst; | |
| 377 int dstskip; | |
| 378 | |
| 379 if ( palette_changed ) { | |
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380 pixels8[0] = (Uint8)SDL_MapRGB(screen->format, 255, 255, 255); |
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381 pixels8[1] = (Uint8)SDL_MapRGB(screen->format, 0, 0, 0); |
| 0 | 382 palette_changed = 0; |
| 383 } | |
| 384 dst = (Uint8 *)screen->pixels + | |
| 385 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 386 SDL_cursor->area.x; | |
| 387 dstskip = screen->pitch-area->w; | |
| 388 | |
| 389 for ( h=area->h; h; h-- ) { | |
| 390 for ( w=area->w/8; w; w-- ) { | |
| 391 maskb = *mask++; | |
| 392 datab = *data++; | |
| 393 for ( i=0; i<8; ++i ) { | |
| 394 if ( maskb & 0x80 ) { | |
| 395 *dst = pixels8[datab>>7]; | |
| 396 } | |
| 397 maskb <<= 1; | |
| 398 datab <<= 1; | |
| 399 dst++; | |
| 400 } | |
| 401 } | |
| 402 dst += dstskip; | |
| 403 } | |
| 404 } | |
| 405 break; | |
| 406 | |
| 407 case 2: { | |
| 408 Uint16 *dst; | |
| 409 int dstskip; | |
| 410 | |
| 411 dst = (Uint16 *)screen->pixels + | |
| 412 (SDL_cursor->area.y+area->y)*screen->pitch/2 + | |
| 413 SDL_cursor->area.x; | |
| 414 dstskip = (screen->pitch/2)-area->w; | |
| 415 | |
| 416 for ( h=area->h; h; h-- ) { | |
| 417 for ( w=area->w/8; w; w-- ) { | |
| 418 maskb = *mask++; | |
| 419 datab = *data++; | |
| 420 for ( i=0; i<8; ++i ) { | |
| 421 if ( maskb & 0x80 ) { | |
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422 *dst = (Uint16)pixels[datab>>7]; |
| 0 | 423 } |
| 424 maskb <<= 1; | |
| 425 datab <<= 1; | |
| 426 dst++; | |
| 427 } | |
| 428 } | |
| 429 dst += dstskip; | |
| 430 } | |
| 431 } | |
| 432 break; | |
| 433 | |
| 434 case 3: { | |
| 435 Uint8 *dst; | |
| 436 int dstskip; | |
| 437 | |
| 438 dst = (Uint8 *)screen->pixels + | |
| 439 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 440 SDL_cursor->area.x*3; | |
| 441 dstskip = screen->pitch-area->w*3; | |
| 442 | |
| 443 for ( h=area->h; h; h-- ) { | |
| 444 for ( w=area->w/8; w; w-- ) { | |
| 445 maskb = *mask++; | |
| 446 datab = *data++; | |
| 447 for ( i=0; i<8; ++i ) { | |
| 448 if ( maskb & 0x80 ) { | |
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449 SDL_memset(dst,pixels[datab>>7],3); |
| 0 | 450 } |
| 451 maskb <<= 1; | |
| 452 datab <<= 1; | |
| 453 dst += 3; | |
| 454 } | |
| 455 } | |
| 456 dst += dstskip; | |
| 457 } | |
| 458 } | |
| 459 break; | |
| 460 | |
| 461 case 4: { | |
| 462 Uint32 *dst; | |
| 463 int dstskip; | |
| 464 | |
| 465 dst = (Uint32 *)screen->pixels + | |
| 466 (SDL_cursor->area.y+area->y)*screen->pitch/4 + | |
| 467 SDL_cursor->area.x; | |
| 468 dstskip = (screen->pitch/4)-area->w; | |
| 469 | |
| 470 for ( h=area->h; h; h-- ) { | |
| 471 for ( w=area->w/8; w; w-- ) { | |
| 472 maskb = *mask++; | |
| 473 datab = *data++; | |
| 474 for ( i=0; i<8; ++i ) { | |
| 475 if ( maskb & 0x80 ) { | |
| 476 *dst = pixels[datab>>7]; | |
| 477 } | |
| 478 maskb <<= 1; | |
| 479 datab <<= 1; | |
| 480 dst++; | |
| 481 } | |
| 482 } | |
| 483 dst += dstskip; | |
| 484 } | |
| 485 } | |
| 486 break; | |
| 487 } | |
| 488 } | |
| 489 | |
| 490 static void SDL_DrawCursorSlow(SDL_Surface *screen, SDL_Rect *area) | |
| 491 { | |
| 492 const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 }; | |
| 493 int h; | |
| 494 int x, minx, maxx; | |
| 495 Uint8 *data, datab = 0; | |
| 496 Uint8 *mask, maskb = 0; | |
| 497 Uint8 *dst; | |
| 498 int dstbpp, dstskip; | |
| 499 | |
| 500 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 501 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 502 dstbpp = screen->format->BytesPerPixel; | |
| 503 dst = (Uint8 *)screen->pixels + | |
| 504 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 505 SDL_cursor->area.x*dstbpp; | |
| 506 dstskip = screen->pitch-SDL_cursor->area.w*dstbpp; | |
| 507 | |
| 508 minx = area->x; | |
| 509 maxx = area->x+area->w; | |
| 510 if ( screen->format->BytesPerPixel == 1 ) { | |
| 511 if ( palette_changed ) { | |
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512 pixels8[0] = (Uint8)SDL_MapRGB(screen->format, 255, 255, 255); |
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513 pixels8[1] = (Uint8)SDL_MapRGB(screen->format, 0, 0, 0); |
| 0 | 514 palette_changed = 0; |
| 515 } | |
| 516 for ( h=area->h; h; h-- ) { | |
| 517 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 518 if ( (x%8) == 0 ) { | |
| 519 maskb = *mask++; | |
| 520 datab = *data++; | |
| 521 } | |
| 522 if ( (x >= minx) && (x < maxx) ) { | |
| 523 if ( maskb & 0x80 ) { | |
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524 SDL_memset(dst, pixels8[datab>>7], dstbpp); |
| 0 | 525 } |
| 526 } | |
| 527 maskb <<= 1; | |
| 528 datab <<= 1; | |
| 529 dst += dstbpp; | |
| 530 } | |
| 531 dst += dstskip; | |
| 532 } | |
| 533 } else { | |
| 534 for ( h=area->h; h; h-- ) { | |
| 535 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 536 if ( (x%8) == 0 ) { | |
| 537 maskb = *mask++; | |
| 538 datab = *data++; | |
| 539 } | |
| 540 if ( (x >= minx) && (x < maxx) ) { | |
| 541 if ( maskb & 0x80 ) { | |
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542 SDL_memset(dst, pixels[datab>>7], dstbpp); |
| 0 | 543 } |
| 544 } | |
| 545 maskb <<= 1; | |
| 546 datab <<= 1; | |
| 547 dst += dstbpp; | |
| 548 } | |
| 549 dst += dstskip; | |
| 550 } | |
| 551 } | |
| 552 } | |
| 553 | |
| 554 /* This handles the ugly work of converting the saved cursor background from | |
| 555 the pixel format of the shadow surface to that of the video surface. | |
| 556 This is only necessary when blitting from a shadow surface of a different | |
| 557 pixel format than the video surface, and using a software rendered cursor. | |
| 558 */ | |
| 559 static void SDL_ConvertCursorSave(SDL_Surface *screen, int w, int h) | |
| 560 { | |
| 561 SDL_BlitInfo info; | |
| 562 SDL_loblit RunBlit; | |
| 563 | |
| 564 /* Make sure we can steal the blit mapping */ | |
| 565 if ( screen->map->dst != SDL_VideoSurface ) { | |
| 566 return; | |
| 567 } | |
| 568 | |
| 569 /* Set up the blit information */ | |
| 570 info.s_pixels = SDL_cursor->save[1]; | |
| 571 info.s_width = w; | |
| 572 info.s_height = h; | |
| 573 info.s_skip = 0; | |
| 574 info.d_pixels = SDL_cursor->save[0]; | |
| 575 info.d_width = w; | |
| 576 info.d_height = h; | |
| 577 info.d_skip = 0; | |
| 578 info.aux_data = screen->map->sw_data->aux_data; | |
| 579 info.src = screen->format; | |
| 580 info.table = screen->map->table; | |
| 581 info.dst = SDL_VideoSurface->format; | |
| 582 RunBlit = screen->map->sw_data->blit; | |
| 583 | |
| 584 /* Run the actual software blit */ | |
| 585 RunBlit(&info); | |
| 586 } | |
| 587 | |
| 588 void SDL_DrawCursorNoLock(SDL_Surface *screen) | |
| 589 { | |
| 590 SDL_Rect area; | |
| 591 | |
| 592 /* Get the mouse rectangle, clipped to the screen */ | |
| 593 SDL_MouseRect(&area); | |
| 594 if ( (area.w == 0) || (area.h == 0) ) { | |
| 595 return; | |
| 596 } | |
| 597 | |
| 598 /* Copy mouse background */ | |
| 599 { int w, h, screenbpp; | |
| 600 Uint8 *src, *dst; | |
| 601 | |
| 602 /* Set up the copy pointers */ | |
| 603 screenbpp = screen->format->BytesPerPixel; | |
| 604 if ( (screen == SDL_VideoSurface) || | |
| 605 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 606 dst = SDL_cursor->save[0]; | |
| 607 } else { | |
| 608 dst = SDL_cursor->save[1]; | |
| 609 } | |
| 610 src = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 611 area.x * screenbpp; | |
| 612 | |
| 613 /* Perform the copy */ | |
| 614 w = area.w*screenbpp; | |
| 615 h = area.h; | |
| 616 while ( h-- ) { | |
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617 SDL_memcpy(dst, src, w); |
| 0 | 618 dst += w; |
| 619 src += screen->pitch; | |
| 620 } | |
| 621 } | |
| 622 | |
| 623 /* Draw the mouse cursor */ | |
| 624 area.x -= SDL_cursor->area.x; | |
| 625 area.y -= SDL_cursor->area.y; | |
| 626 if ( (area.x == 0) && (area.w == SDL_cursor->area.w) ) { | |
| 627 SDL_DrawCursorFast(screen, &area); | |
| 628 } else { | |
| 629 SDL_DrawCursorSlow(screen, &area); | |
| 630 } | |
| 631 } | |
| 632 | |
| 633 void SDL_DrawCursor(SDL_Surface *screen) | |
| 634 { | |
| 635 /* Lock the screen if necessary */ | |
| 636 if ( screen == NULL ) { | |
| 637 return; | |
| 638 } | |
| 639 if ( SDL_MUSTLOCK(screen) ) { | |
| 640 if ( SDL_LockSurface(screen) < 0 ) { | |
| 641 return; | |
| 642 } | |
| 643 } | |
| 644 | |
| 645 SDL_DrawCursorNoLock(screen); | |
| 646 | |
| 647 /* Unlock the screen and update if necessary */ | |
| 648 if ( SDL_MUSTLOCK(screen) ) { | |
| 649 SDL_UnlockSurface(screen); | |
| 650 } | |
| 651 if ( (screen == SDL_VideoSurface) && | |
| 652 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 653 SDL_VideoDevice *video = current_video; | |
| 654 SDL_VideoDevice *this = current_video; | |
| 655 SDL_Rect area; | |
| 656 | |
| 657 SDL_MouseRect(&area); | |
| 658 | |
| 659 /* This can be called before a video mode is set */ | |
| 660 if ( video->UpdateRects ) { | |
| 661 video->UpdateRects(this, 1, &area); | |
| 662 } | |
| 663 } | |
| 664 } | |
| 665 | |
| 666 void SDL_EraseCursorNoLock(SDL_Surface *screen) | |
| 667 { | |
| 668 SDL_Rect area; | |
| 669 | |
| 670 /* Get the mouse rectangle, clipped to the screen */ | |
| 671 SDL_MouseRect(&area); | |
| 672 if ( (area.w == 0) || (area.h == 0) ) { | |
| 673 return; | |
| 674 } | |
| 675 | |
| 676 /* Copy mouse background */ | |
| 677 { int w, h, screenbpp; | |
| 678 Uint8 *src, *dst; | |
| 679 | |
| 680 /* Set up the copy pointers */ | |
| 681 screenbpp = screen->format->BytesPerPixel; | |
| 682 if ( (screen == SDL_VideoSurface) || | |
| 683 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 684 src = SDL_cursor->save[0]; | |
| 685 } else { | |
| 686 src = SDL_cursor->save[1]; | |
| 687 } | |
| 688 dst = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 689 area.x * screenbpp; | |
| 690 | |
| 691 /* Perform the copy */ | |
| 692 w = area.w*screenbpp; | |
| 693 h = area.h; | |
| 694 while ( h-- ) { | |
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695 SDL_memcpy(dst, src, w); |
| 0 | 696 src += w; |
| 697 dst += screen->pitch; | |
| 698 } | |
| 699 | |
| 700 /* Perform pixel conversion on cursor background */ | |
| 701 if ( src > SDL_cursor->save[1] ) { | |
| 702 SDL_ConvertCursorSave(screen, area.w, area.h); | |
| 703 } | |
| 704 } | |
| 705 } | |
| 706 | |
| 707 void SDL_EraseCursor(SDL_Surface *screen) | |
| 708 { | |
| 709 /* Lock the screen if necessary */ | |
| 710 if ( screen == NULL ) { | |
| 711 return; | |
| 712 } | |
| 713 if ( SDL_MUSTLOCK(screen) ) { | |
| 714 if ( SDL_LockSurface(screen) < 0 ) { | |
| 715 return; | |
| 716 } | |
| 717 } | |
| 718 | |
| 719 SDL_EraseCursorNoLock(screen); | |
| 720 | |
| 721 /* Unlock the screen and update if necessary */ | |
| 722 if ( SDL_MUSTLOCK(screen) ) { | |
| 723 SDL_UnlockSurface(screen); | |
| 724 } | |
| 725 if ( (screen == SDL_VideoSurface) && | |
| 726 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 727 SDL_VideoDevice *video = current_video; | |
| 728 SDL_VideoDevice *this = current_video; | |
| 729 SDL_Rect area; | |
| 730 | |
| 731 SDL_MouseRect(&area); | |
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732 if ( video->UpdateRects ) { |
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733 video->UpdateRects(this, 1, &area); |
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734 } |
| 0 | 735 } |
| 736 } | |
| 737 | |
| 738 /* Reset the cursor on video mode change | |
| 739 FIXME: Keep track of all cursors, and reset them all. | |
| 740 */ | |
| 741 void SDL_ResetCursor(void) | |
| 742 { | |
| 743 int savelen; | |
| 744 | |
| 745 if ( SDL_cursor ) { | |
| 746 savelen = SDL_cursor->area.w*4*SDL_cursor->area.h; | |
| 747 SDL_cursor->area.x = 0; | |
| 748 SDL_cursor->area.y = 0; | |
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749 SDL_memset(SDL_cursor->save[0], 0, savelen); |
| 0 | 750 } |
| 751 } |