Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 4067:07d621a03a94 SDL-1.2
Use SDL C functions (fixes security warnings on OpenBSD)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 14 Jul 2007 21:09:54 +0000 |
| parents | 37dab4a917c4 |
| children | a1b03ba2fcd0 |
| 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 */ | |
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191 if ( SDL_cursor && video->ShowWMCursor ) { |
| 0 | 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 */ | |
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201 int show_wm_cursor = 0; |
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202 if ( SDL_cursor->wm_cursor && video->ShowWMCursor ) { |
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203 show_wm_cursor = video->ShowWMCursor(this, SDL_cursor->wm_cursor); |
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204 } |
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205 if ( show_wm_cursor ) { |
| 0 | 206 SDL_cursorstate &= ~CURSOR_USINGSW; |
| 1296 | 207 } else { |
| 0 | 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 ) { | |
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225 if ( video->ShowWMCursor ) { |
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226 video->ShowWMCursor(this, NULL); |
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227 } |
| 0 | 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 ) { | |
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246 SDL_VideoDevice *video = current_video; |
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247 SDL_VideoDevice *this = current_video; |
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248 |
| 0 | 249 if ( cursor->data ) { |
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250 SDL_free(cursor->data); |
| 0 | 251 } |
| 252 if ( cursor->save[0] ) { | |
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253 SDL_free(cursor->save[0]); |
| 0 | 254 } |
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255 if ( video && cursor->wm_cursor ) { |
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256 if ( video->FreeWMCursor ) { |
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257 video->FreeWMCursor(this, cursor->wm_cursor); |
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258 } |
| 0 | 259 } |
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260 SDL_free(cursor); |
| 0 | 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 | |
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298 if ( !video || !SDL_PublicSurface ) { |
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299 SDL_SetError("A video mode must be set before warping mouse"); |
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300 return; |
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301 } |
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302 |
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303 /* If we have an offset video mode, offset the mouse coordinates */ |
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304 if (this->screen->pitch == 0) { |
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305 x += this->screen->offset / this->screen->format->BytesPerPixel; |
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306 y += this->screen->offset; |
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307 } else { |
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308 x += (this->screen->offset % this->screen->pitch) / |
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309 this->screen->format->BytesPerPixel; |
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310 y += (this->screen->offset / this->screen->pitch); |
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311 } |
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312 |
| 0 | 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; | |
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341 static Uint8 pixels8[2]; |
| 0 | 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 ) { | |
|
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363 area->w = area->w < clip_diff ? 0 : area->w-clip_diff; |
| 0 | 364 } |
| 365 clip_diff = (area->y+area->h)-SDL_VideoSurface->h; | |
| 366 if ( clip_diff > 0 ) { | |
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367 area->h = area->h < clip_diff ? 0 : area->h-clip_diff; |
| 0 | 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 ) { | |
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387 pixels8[0] = (Uint8)SDL_MapRGB(screen->format, 255, 255, 255); |
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388 pixels8[1] = (Uint8)SDL_MapRGB(screen->format, 0, 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 ) { | |
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429 *dst = (Uint16)pixels[datab>>7]; |
| 0 | 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 ) { | |
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456 SDL_memset(dst,pixels[datab>>7],3); |
| 0 | 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 ) { | |
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519 pixels8[0] = (Uint8)SDL_MapRGB(screen->format, 255, 255, 255); |
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520 pixels8[1] = (Uint8)SDL_MapRGB(screen->format, 0, 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 ) { | |
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531 SDL_memset(dst, pixels8[datab>>7], dstbpp); |
| 0 | 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 ) { | |
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549 SDL_memset(dst, pixels[datab>>7], dstbpp); |
| 0 | 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-- ) { | |
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624 SDL_memcpy(dst, src, w); |
| 0 | 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-- ) { | |
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702 SDL_memcpy(dst, src, w); |
| 0 | 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); | |
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|
739 if ( video->UpdateRects ) { |
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740 video->UpdateRects(this, 1, &area); |
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|
741 } |
| 0 | 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; | |
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756 SDL_memset(SDL_cursor->save[0], 0, savelen); |
| 0 | 757 } |
| 758 } |