Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 1172:f69f4d25fb20
Don't crash if a NULL is passed for a "%s" parameter to SDL_SetError(),
instead replace it with the string "(null)", like glibc's printf() would do.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 17 Nov 2005 03:04:47 +0000 |
| parents | 96ef83467667 |
| children | f418917e0b7a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
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|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* General cursor handling code for SDL */ | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <string.h> | |
| 33 | |
| 34 #include "SDL_mutex.h" | |
| 35 #include "SDL_error.h" | |
| 36 #include "SDL_video.h" | |
| 37 #include "SDL_mouse.h" | |
| 38 #include "SDL_blit.h" | |
| 39 #include "SDL_events_c.h" | |
| 40 #include "SDL_sysvideo.h" | |
| 41 #include "SDL_sysevents.h" | |
| 42 #include "SDL_cursor_c.h" | |
| 43 #include "SDL_pixels_c.h" | |
| 44 #include "default_cursor.h" | |
| 45 | |
| 46 /* These are static for our cursor handling code */ | |
| 47 volatile int SDL_cursorstate = CURSOR_VISIBLE; | |
| 48 SDL_Cursor *SDL_cursor = NULL; | |
| 49 static SDL_Cursor *SDL_defcursor = NULL; | |
| 50 SDL_mutex *SDL_cursorlock = NULL; | |
| 51 | |
| 52 /* Public functions */ | |
| 53 void SDL_CursorQuit(void) | |
| 54 { | |
| 55 if ( SDL_cursor != NULL ) { | |
| 56 SDL_Cursor *cursor; | |
| 57 | |
| 58 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 59 if ( SDL_cursor != SDL_defcursor ) { | |
| 60 SDL_FreeCursor(SDL_cursor); | |
| 61 } | |
| 62 SDL_cursor = NULL; | |
| 63 if ( SDL_defcursor != NULL ) { | |
| 64 cursor = SDL_defcursor; | |
| 65 SDL_defcursor = NULL; | |
| 66 SDL_FreeCursor(cursor); | |
| 67 } | |
| 68 } | |
| 69 if ( SDL_cursorlock != NULL ) { | |
| 70 SDL_DestroyMutex(SDL_cursorlock); | |
| 71 SDL_cursorlock = NULL; | |
| 72 } | |
| 73 } | |
| 74 int SDL_CursorInit(Uint32 multithreaded) | |
| 75 { | |
| 76 /* We don't have mouse focus, and the cursor isn't drawn yet */ | |
|
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iPod Linux framebuffer support.
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77 #ifndef IPOD |
| 0 | 78 SDL_cursorstate = CURSOR_VISIBLE; |
|
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79 #endif |
| 0 | 80 |
| 81 /* Create the default cursor */ | |
| 82 if ( SDL_defcursor == NULL ) { | |
| 83 SDL_defcursor = SDL_CreateCursor(default_cdata, default_cmask, | |
| 84 DEFAULT_CWIDTH, DEFAULT_CHEIGHT, | |
| 85 DEFAULT_CHOTX, DEFAULT_CHOTY); | |
| 86 SDL_SetCursor(SDL_defcursor); | |
| 87 } | |
| 88 | |
| 89 /* Create a lock if necessary */ | |
| 90 if ( multithreaded ) { | |
| 91 SDL_cursorlock = SDL_CreateMutex(); | |
| 92 } | |
| 93 | |
| 94 /* That's it! */ | |
| 95 return(0); | |
| 96 } | |
| 97 | |
| 98 /* Multi-thread support for cursors */ | |
| 99 #ifndef SDL_LockCursor | |
| 100 void SDL_LockCursor(void) | |
| 101 { | |
| 102 if ( SDL_cursorlock ) { | |
| 103 SDL_mutexP(SDL_cursorlock); | |
| 104 } | |
| 105 } | |
| 106 #endif | |
| 107 #ifndef SDL_UnlockCursor | |
| 108 void SDL_UnlockCursor(void) | |
| 109 { | |
| 110 if ( SDL_cursorlock ) { | |
| 111 SDL_mutexV(SDL_cursorlock); | |
| 112 } | |
| 113 } | |
| 114 #endif | |
| 115 | |
| 116 /* Software cursor drawing support */ | |
| 117 SDL_Cursor * SDL_CreateCursor (Uint8 *data, Uint8 *mask, | |
| 118 int w, int h, int hot_x, int hot_y) | |
| 119 { | |
| 120 SDL_VideoDevice *video = current_video; | |
| 121 int savelen; | |
| 122 int i; | |
| 123 SDL_Cursor *cursor; | |
| 124 | |
| 125 /* Make sure the width is a multiple of 8 */ | |
| 126 w = ((w+7)&~7); | |
| 127 | |
| 128 /* Sanity check the hot spot */ | |
| 129 if ( (hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h) ) { | |
| 130 SDL_SetError("Cursor hot spot doesn't lie within cursor"); | |
| 131 return(NULL); | |
| 132 } | |
| 133 | |
| 134 /* Allocate memory for the cursor */ | |
| 135 cursor = (SDL_Cursor *)malloc(sizeof *cursor); | |
| 136 if ( cursor == NULL ) { | |
| 137 SDL_OutOfMemory(); | |
| 138 return(NULL); | |
| 139 } | |
| 140 savelen = (w*4)*h; | |
| 141 cursor->area.x = 0; | |
| 142 cursor->area.y = 0; | |
| 143 cursor->area.w = w; | |
| 144 cursor->area.h = h; | |
| 145 cursor->hot_x = hot_x; | |
| 146 cursor->hot_y = hot_y; | |
| 147 cursor->data = (Uint8 *)malloc((w/8)*h*2); | |
| 148 cursor->mask = cursor->data+((w/8)*h); | |
| 149 cursor->save[0] = (Uint8 *)malloc(savelen*2); | |
| 150 cursor->save[1] = cursor->save[0] + savelen; | |
| 151 cursor->wm_cursor = NULL; | |
| 152 if ( ! cursor->data || ! cursor->save[0] ) { | |
| 153 SDL_FreeCursor(cursor); | |
| 154 SDL_OutOfMemory(); | |
| 155 return(NULL); | |
| 156 } | |
| 157 for ( i=((w/8)*h)-1; i>=0; --i ) { | |
| 158 cursor->data[i] = data[i]; | |
| 159 cursor->mask[i] = mask[i] | data[i]; | |
| 160 } | |
| 161 memset(cursor->save[0], 0, savelen*2); | |
| 162 | |
| 163 /* If the window manager gives us a good cursor, we're done! */ | |
| 164 if ( video->CreateWMCursor ) { | |
| 165 cursor->wm_cursor = video->CreateWMCursor(video, data, mask, | |
| 166 w, h, hot_x, hot_y); | |
| 167 } else { | |
| 168 cursor->wm_cursor = NULL; | |
| 169 } | |
| 170 return(cursor); | |
| 171 } | |
| 172 | |
| 173 /* SDL_SetCursor(NULL) can be used to force the cursor redraw, | |
| 174 if this is desired for any reason. This is used when setting | |
| 175 the video mode and when the SDL window gains the mouse focus. | |
| 176 */ | |
| 177 void SDL_SetCursor (SDL_Cursor *cursor) | |
| 178 { | |
| 179 SDL_VideoDevice *video = current_video; | |
| 180 SDL_VideoDevice *this = current_video; | |
| 181 | |
| 182 /* Make sure that the video subsystem has been initialized */ | |
| 183 if ( ! video ) { | |
| 184 return; | |
| 185 } | |
| 186 | |
| 187 /* Prevent the event thread from moving the mouse */ | |
| 188 SDL_LockCursor(); | |
| 189 | |
| 190 /* Set the new cursor */ | |
| 191 if ( cursor && (cursor != SDL_cursor) ) { | |
| 192 /* Erase the current mouse position */ | |
| 193 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 194 SDL_EraseCursor(SDL_VideoSurface); | |
| 195 } else if ( video->MoveWMCursor ) { | |
| 196 /* If the video driver is moving the cursor directly, | |
| 197 it needs to hide the old cursor before (possibly) | |
| 198 showing the new one. (But don't erase NULL cursor) | |
| 199 */ | |
| 200 if ( SDL_cursor ) { | |
| 201 video->ShowWMCursor(this, NULL); | |
| 202 } | |
| 203 } | |
| 204 SDL_cursor = cursor; | |
| 205 } | |
| 206 | |
| 207 /* Draw the new mouse cursor */ | |
| 208 if ( SDL_cursor && (SDL_cursorstate&CURSOR_VISIBLE) ) { | |
| 209 /* Use window manager cursor if possible */ | |
| 210 if ( SDL_cursor->wm_cursor && | |
| 211 video->ShowWMCursor(this, SDL_cursor->wm_cursor) ) | |
| 212 SDL_cursorstate &= ~CURSOR_USINGSW; | |
| 213 else { | |
| 214 SDL_cursorstate |= CURSOR_USINGSW; | |
| 215 if ( video->ShowWMCursor ) { | |
| 216 video->ShowWMCursor(this, NULL); | |
| 217 } | |
| 218 { int x, y; | |
| 219 SDL_GetMouseState(&x, &y); | |
| 220 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 221 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 222 } | |
| 223 SDL_DrawCursor(SDL_VideoSurface); | |
| 224 } | |
| 225 } else { | |
| 226 /* Erase window manager mouse (cursor not visible) */ | |
| 227 if ( SDL_cursor && (SDL_cursorstate & CURSOR_USINGSW) ) { | |
| 228 SDL_EraseCursor(SDL_VideoSurface); | |
| 229 } else { | |
| 230 if ( video ) { | |
| 231 video->ShowWMCursor(this, NULL); | |
| 232 } | |
| 233 } | |
| 234 } | |
| 235 SDL_UnlockCursor(); | |
| 236 } | |
| 237 | |
| 238 SDL_Cursor * SDL_GetCursor (void) | |
| 239 { | |
| 240 return(SDL_cursor); | |
| 241 } | |
| 242 | |
| 243 void SDL_FreeCursor (SDL_Cursor *cursor) | |
| 244 { | |
| 245 if ( cursor ) { | |
| 246 if ( cursor == SDL_cursor ) { | |
| 247 SDL_SetCursor(SDL_defcursor); | |
| 248 } | |
| 249 if ( cursor != SDL_defcursor ) { | |
|
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250 SDL_VideoDevice *video = current_video; |
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251 SDL_VideoDevice *this = current_video; |
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252 |
| 0 | 253 if ( cursor->data ) { |
| 254 free(cursor->data); | |
| 255 } | |
| 256 if ( cursor->save[0] ) { | |
| 257 free(cursor->save[0]); | |
| 258 } | |
|
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259 if ( video && cursor->wm_cursor ) { |
| 0 | 260 video->FreeWMCursor(this, cursor->wm_cursor); |
| 261 } | |
| 262 free(cursor); | |
| 263 } | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 int SDL_ShowCursor (int toggle) | |
| 268 { | |
| 269 int showing; | |
| 270 | |
| 271 showing = (SDL_cursorstate & CURSOR_VISIBLE); | |
| 272 if ( toggle >= 0 ) { | |
| 273 SDL_LockCursor(); | |
| 274 if ( toggle ) { | |
| 275 SDL_cursorstate |= CURSOR_VISIBLE; | |
| 276 } else { | |
| 277 SDL_cursorstate &= ~CURSOR_VISIBLE; | |
| 278 } | |
| 279 SDL_UnlockCursor(); | |
| 280 if ( (SDL_cursorstate & CURSOR_VISIBLE) != showing ) { | |
| 281 SDL_VideoDevice *video = current_video; | |
| 282 SDL_VideoDevice *this = current_video; | |
| 283 | |
| 284 SDL_SetCursor(NULL); | |
| 285 if ( video && video->CheckMouseMode ) { | |
| 286 video->CheckMouseMode(this); | |
| 287 } | |
| 288 } | |
| 289 } else { | |
| 290 /* Query current state */ ; | |
| 291 } | |
| 292 return(showing ? 1 : 0); | |
| 293 } | |
| 294 | |
| 295 void SDL_WarpMouse (Uint16 x, Uint16 y) | |
| 296 { | |
| 297 SDL_VideoDevice *video = current_video; | |
| 298 SDL_VideoDevice *this = current_video; | |
| 299 | |
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300 if ( !video || !SDL_PublicSurface ) { |
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301 SDL_SetError("A video mode must be set before warping mouse"); |
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302 return; |
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303 } |
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304 |
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305 /* If we have an offset video mode, offset the mouse coordinates */ |
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306 if (this->screen->pitch == 0) { |
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parents:
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307 x += this->screen->offset / this->screen->format->BytesPerPixel; |
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Prevent division-by-zero in WarpMouse if surface's pitch is zero (a GL surface?).
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parents:
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changeset
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308 y += this->screen->offset; |
|
96ef83467667
Prevent division-by-zero in WarpMouse if surface's pitch is zero (a GL surface?).
Ryan C. Gordon <icculus@icculus.org>
parents:
1140
diff
changeset
|
309 } else { |
|
96ef83467667
Prevent division-by-zero in WarpMouse if surface's pitch is zero (a GL surface?).
Ryan C. Gordon <icculus@icculus.org>
parents:
1140
diff
changeset
|
310 x += (this->screen->offset % this->screen->pitch) / |
|
96ef83467667
Prevent division-by-zero in WarpMouse if surface's pitch is zero (a GL surface?).
Ryan C. Gordon <icculus@icculus.org>
parents:
1140
diff
changeset
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311 this->screen->format->BytesPerPixel; |
|
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Prevent division-by-zero in WarpMouse if surface's pitch is zero (a GL surface?).
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parents:
1140
diff
changeset
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312 y += (this->screen->offset / this->screen->pitch); |
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parents:
1140
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313 } |
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Sam Lantinga <slouken@libsdl.org>
parents:
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314 |
| 0 | 315 /* This generates a mouse motion event */ |
| 316 if ( video->WarpWMCursor ) { | |
| 317 video->WarpWMCursor(this, x, y); | |
| 318 } else { | |
| 319 SDL_PrivateMouseMotion(0, 0, x, y); | |
| 320 } | |
| 321 } | |
| 322 | |
| 323 void SDL_MoveCursor(int x, int y) | |
| 324 { | |
| 325 SDL_VideoDevice *video = current_video; | |
| 326 | |
| 327 /* Erase and update the current mouse position */ | |
| 328 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 329 /* Erase and redraw mouse cursor in new position */ | |
| 330 SDL_LockCursor(); | |
| 331 SDL_EraseCursor(SDL_VideoSurface); | |
| 332 SDL_cursor->area.x = (x - SDL_cursor->hot_x); | |
| 333 SDL_cursor->area.y = (y - SDL_cursor->hot_y); | |
| 334 SDL_DrawCursor(SDL_VideoSurface); | |
| 335 SDL_UnlockCursor(); | |
| 336 } else if ( video->MoveWMCursor ) { | |
| 337 video->MoveWMCursor(video, x, y); | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 /* Keep track of the current cursor colors */ | |
| 342 static int palette_changed = 1; | |
| 343 static Uint32 pixels8[2]; | |
| 344 | |
| 345 void SDL_CursorPaletteChanged(void) | |
| 346 { | |
| 347 palette_changed = 1; | |
| 348 } | |
| 349 | |
| 350 void SDL_MouseRect(SDL_Rect *area) | |
| 351 { | |
| 352 int clip_diff; | |
| 353 | |
| 354 *area = SDL_cursor->area; | |
| 355 if ( area->x < 0 ) { | |
| 356 area->w += area->x; | |
| 357 area->x = 0; | |
| 358 } | |
| 359 if ( area->y < 0 ) { | |
| 360 area->h += area->y; | |
| 361 area->y = 0; | |
| 362 } | |
| 363 clip_diff = (area->x+area->w)-SDL_VideoSurface->w; | |
| 364 if ( clip_diff > 0 ) { | |
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365 area->w = area->w < clip_diff ? 0 : area->w-clip_diff; |
| 0 | 366 } |
| 367 clip_diff = (area->y+area->h)-SDL_VideoSurface->h; | |
| 368 if ( clip_diff > 0 ) { | |
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369 area->h = area->h < clip_diff ? 0 : area->h-clip_diff; |
| 0 | 370 } |
| 371 } | |
| 372 | |
| 373 static void SDL_DrawCursorFast(SDL_Surface *screen, SDL_Rect *area) | |
| 374 { | |
| 375 const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 }; | |
| 376 int i, w, h; | |
| 377 Uint8 *data, datab; | |
| 378 Uint8 *mask, maskb; | |
| 379 | |
| 380 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 381 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 382 switch (screen->format->BytesPerPixel) { | |
| 383 | |
| 384 case 1: { | |
| 385 Uint8 *dst; | |
| 386 int dstskip; | |
| 387 | |
| 388 if ( palette_changed ) { | |
| 389 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 390 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 391 palette_changed = 0; | |
| 392 } | |
| 393 dst = (Uint8 *)screen->pixels + | |
| 394 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 395 SDL_cursor->area.x; | |
| 396 dstskip = screen->pitch-area->w; | |
| 397 | |
| 398 for ( h=area->h; h; h-- ) { | |
| 399 for ( w=area->w/8; w; w-- ) { | |
| 400 maskb = *mask++; | |
| 401 datab = *data++; | |
| 402 for ( i=0; i<8; ++i ) { | |
| 403 if ( maskb & 0x80 ) { | |
| 404 *dst = pixels8[datab>>7]; | |
| 405 } | |
| 406 maskb <<= 1; | |
| 407 datab <<= 1; | |
| 408 dst++; | |
| 409 } | |
| 410 } | |
| 411 dst += dstskip; | |
| 412 } | |
| 413 } | |
| 414 break; | |
| 415 | |
| 416 case 2: { | |
| 417 Uint16 *dst; | |
| 418 int dstskip; | |
| 419 | |
| 420 dst = (Uint16 *)screen->pixels + | |
| 421 (SDL_cursor->area.y+area->y)*screen->pitch/2 + | |
| 422 SDL_cursor->area.x; | |
| 423 dstskip = (screen->pitch/2)-area->w; | |
| 424 | |
| 425 for ( h=area->h; h; h-- ) { | |
| 426 for ( w=area->w/8; w; w-- ) { | |
| 427 maskb = *mask++; | |
| 428 datab = *data++; | |
| 429 for ( i=0; i<8; ++i ) { | |
| 430 if ( maskb & 0x80 ) { | |
| 431 *dst = pixels[datab>>7]; | |
| 432 } | |
| 433 maskb <<= 1; | |
| 434 datab <<= 1; | |
| 435 dst++; | |
| 436 } | |
| 437 } | |
| 438 dst += dstskip; | |
| 439 } | |
| 440 } | |
| 441 break; | |
| 442 | |
| 443 case 3: { | |
| 444 Uint8 *dst; | |
| 445 int dstskip; | |
| 446 | |
| 447 dst = (Uint8 *)screen->pixels + | |
| 448 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 449 SDL_cursor->area.x*3; | |
| 450 dstskip = screen->pitch-area->w*3; | |
| 451 | |
| 452 for ( h=area->h; h; h-- ) { | |
| 453 for ( w=area->w/8; w; w-- ) { | |
| 454 maskb = *mask++; | |
| 455 datab = *data++; | |
| 456 for ( i=0; i<8; ++i ) { | |
| 457 if ( maskb & 0x80 ) { | |
| 458 memset(dst,pixels[datab>>7],3); | |
| 459 } | |
| 460 maskb <<= 1; | |
| 461 datab <<= 1; | |
| 462 dst += 3; | |
| 463 } | |
| 464 } | |
| 465 dst += dstskip; | |
| 466 } | |
| 467 } | |
| 468 break; | |
| 469 | |
| 470 case 4: { | |
| 471 Uint32 *dst; | |
| 472 int dstskip; | |
| 473 | |
| 474 dst = (Uint32 *)screen->pixels + | |
| 475 (SDL_cursor->area.y+area->y)*screen->pitch/4 + | |
| 476 SDL_cursor->area.x; | |
| 477 dstskip = (screen->pitch/4)-area->w; | |
| 478 | |
| 479 for ( h=area->h; h; h-- ) { | |
| 480 for ( w=area->w/8; w; w-- ) { | |
| 481 maskb = *mask++; | |
| 482 datab = *data++; | |
| 483 for ( i=0; i<8; ++i ) { | |
| 484 if ( maskb & 0x80 ) { | |
| 485 *dst = pixels[datab>>7]; | |
| 486 } | |
| 487 maskb <<= 1; | |
| 488 datab <<= 1; | |
| 489 dst++; | |
| 490 } | |
| 491 } | |
| 492 dst += dstskip; | |
| 493 } | |
| 494 } | |
| 495 break; | |
| 496 } | |
| 497 } | |
| 498 | |
| 499 static void SDL_DrawCursorSlow(SDL_Surface *screen, SDL_Rect *area) | |
| 500 { | |
| 501 const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 }; | |
| 502 int h; | |
| 503 int x, minx, maxx; | |
| 504 Uint8 *data, datab = 0; | |
| 505 Uint8 *mask, maskb = 0; | |
| 506 Uint8 *dst; | |
| 507 int dstbpp, dstskip; | |
| 508 | |
| 509 data = SDL_cursor->data + area->y * SDL_cursor->area.w/8; | |
| 510 mask = SDL_cursor->mask + area->y * SDL_cursor->area.w/8; | |
| 511 dstbpp = screen->format->BytesPerPixel; | |
| 512 dst = (Uint8 *)screen->pixels + | |
| 513 (SDL_cursor->area.y+area->y)*screen->pitch + | |
| 514 SDL_cursor->area.x*dstbpp; | |
| 515 dstskip = screen->pitch-SDL_cursor->area.w*dstbpp; | |
| 516 | |
| 517 minx = area->x; | |
| 518 maxx = area->x+area->w; | |
| 519 if ( screen->format->BytesPerPixel == 1 ) { | |
| 520 if ( palette_changed ) { | |
| 521 pixels8[0] = SDL_MapRGB(screen->format, 255, 255, 255); | |
| 522 pixels8[1] = SDL_MapRGB(screen->format, 0, 0, 0); | |
| 523 palette_changed = 0; | |
| 524 } | |
| 525 for ( h=area->h; h; h-- ) { | |
| 526 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 527 if ( (x%8) == 0 ) { | |
| 528 maskb = *mask++; | |
| 529 datab = *data++; | |
| 530 } | |
| 531 if ( (x >= minx) && (x < maxx) ) { | |
| 532 if ( maskb & 0x80 ) { | |
| 533 memset(dst, pixels8[datab>>7], dstbpp); | |
| 534 } | |
| 535 } | |
| 536 maskb <<= 1; | |
| 537 datab <<= 1; | |
| 538 dst += dstbpp; | |
| 539 } | |
| 540 dst += dstskip; | |
| 541 } | |
| 542 } else { | |
| 543 for ( h=area->h; h; h-- ) { | |
| 544 for ( x=0; x<SDL_cursor->area.w; ++x ) { | |
| 545 if ( (x%8) == 0 ) { | |
| 546 maskb = *mask++; | |
| 547 datab = *data++; | |
| 548 } | |
| 549 if ( (x >= minx) && (x < maxx) ) { | |
| 550 if ( maskb & 0x80 ) { | |
| 551 memset(dst, pixels[datab>>7], dstbpp); | |
| 552 } | |
| 553 } | |
| 554 maskb <<= 1; | |
| 555 datab <<= 1; | |
| 556 dst += dstbpp; | |
| 557 } | |
| 558 dst += dstskip; | |
| 559 } | |
| 560 } | |
| 561 } | |
| 562 | |
| 563 /* This handles the ugly work of converting the saved cursor background from | |
| 564 the pixel format of the shadow surface to that of the video surface. | |
| 565 This is only necessary when blitting from a shadow surface of a different | |
| 566 pixel format than the video surface, and using a software rendered cursor. | |
| 567 */ | |
| 568 static void SDL_ConvertCursorSave(SDL_Surface *screen, int w, int h) | |
| 569 { | |
| 570 SDL_BlitInfo info; | |
| 571 SDL_loblit RunBlit; | |
| 572 | |
| 573 /* Make sure we can steal the blit mapping */ | |
| 574 if ( screen->map->dst != SDL_VideoSurface ) { | |
| 575 return; | |
| 576 } | |
| 577 | |
| 578 /* Set up the blit information */ | |
| 579 info.s_pixels = SDL_cursor->save[1]; | |
| 580 info.s_width = w; | |
| 581 info.s_height = h; | |
| 582 info.s_skip = 0; | |
| 583 info.d_pixels = SDL_cursor->save[0]; | |
| 584 info.d_width = w; | |
| 585 info.d_height = h; | |
| 586 info.d_skip = 0; | |
| 587 info.aux_data = screen->map->sw_data->aux_data; | |
| 588 info.src = screen->format; | |
| 589 info.table = screen->map->table; | |
| 590 info.dst = SDL_VideoSurface->format; | |
| 591 RunBlit = screen->map->sw_data->blit; | |
| 592 | |
| 593 /* Run the actual software blit */ | |
| 594 RunBlit(&info); | |
| 595 } | |
| 596 | |
| 597 void SDL_DrawCursorNoLock(SDL_Surface *screen) | |
| 598 { | |
| 599 SDL_Rect area; | |
| 600 | |
| 601 /* Get the mouse rectangle, clipped to the screen */ | |
| 602 SDL_MouseRect(&area); | |
| 603 if ( (area.w == 0) || (area.h == 0) ) { | |
| 604 return; | |
| 605 } | |
| 606 | |
| 607 /* Copy mouse background */ | |
| 608 { int w, h, screenbpp; | |
| 609 Uint8 *src, *dst; | |
| 610 | |
| 611 /* Set up the copy pointers */ | |
| 612 screenbpp = screen->format->BytesPerPixel; | |
| 613 if ( (screen == SDL_VideoSurface) || | |
| 614 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 615 dst = SDL_cursor->save[0]; | |
| 616 } else { | |
| 617 dst = SDL_cursor->save[1]; | |
| 618 } | |
| 619 src = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 620 area.x * screenbpp; | |
| 621 | |
| 622 /* Perform the copy */ | |
| 623 w = area.w*screenbpp; | |
| 624 h = area.h; | |
| 625 while ( h-- ) { | |
| 626 memcpy(dst, src, w); | |
| 627 dst += w; | |
| 628 src += screen->pitch; | |
| 629 } | |
| 630 } | |
| 631 | |
| 632 /* Draw the mouse cursor */ | |
| 633 area.x -= SDL_cursor->area.x; | |
| 634 area.y -= SDL_cursor->area.y; | |
| 635 if ( (area.x == 0) && (area.w == SDL_cursor->area.w) ) { | |
| 636 SDL_DrawCursorFast(screen, &area); | |
| 637 } else { | |
| 638 SDL_DrawCursorSlow(screen, &area); | |
| 639 } | |
| 640 } | |
| 641 | |
| 642 void SDL_DrawCursor(SDL_Surface *screen) | |
| 643 { | |
| 644 /* Lock the screen if necessary */ | |
| 645 if ( screen == NULL ) { | |
| 646 return; | |
| 647 } | |
| 648 if ( SDL_MUSTLOCK(screen) ) { | |
| 649 if ( SDL_LockSurface(screen) < 0 ) { | |
| 650 return; | |
| 651 } | |
| 652 } | |
| 653 | |
| 654 SDL_DrawCursorNoLock(screen); | |
| 655 | |
| 656 /* Unlock the screen and update if necessary */ | |
| 657 if ( SDL_MUSTLOCK(screen) ) { | |
| 658 SDL_UnlockSurface(screen); | |
| 659 } | |
| 660 if ( (screen == SDL_VideoSurface) && | |
| 661 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 662 SDL_VideoDevice *video = current_video; | |
| 663 SDL_VideoDevice *this = current_video; | |
| 664 SDL_Rect area; | |
| 665 | |
| 666 SDL_MouseRect(&area); | |
| 667 | |
| 668 /* This can be called before a video mode is set */ | |
| 669 if ( video->UpdateRects ) { | |
| 670 video->UpdateRects(this, 1, &area); | |
| 671 } | |
| 672 } | |
| 673 } | |
| 674 | |
| 675 void SDL_EraseCursorNoLock(SDL_Surface *screen) | |
| 676 { | |
| 677 SDL_Rect area; | |
| 678 | |
| 679 /* Get the mouse rectangle, clipped to the screen */ | |
| 680 SDL_MouseRect(&area); | |
| 681 if ( (area.w == 0) || (area.h == 0) ) { | |
| 682 return; | |
| 683 } | |
| 684 | |
| 685 /* Copy mouse background */ | |
| 686 { int w, h, screenbpp; | |
| 687 Uint8 *src, *dst; | |
| 688 | |
| 689 /* Set up the copy pointers */ | |
| 690 screenbpp = screen->format->BytesPerPixel; | |
| 691 if ( (screen == SDL_VideoSurface) || | |
| 692 FORMAT_EQUAL(screen->format, SDL_VideoSurface->format) ) { | |
| 693 src = SDL_cursor->save[0]; | |
| 694 } else { | |
| 695 src = SDL_cursor->save[1]; | |
| 696 } | |
| 697 dst = (Uint8 *)screen->pixels + area.y * screen->pitch + | |
| 698 area.x * screenbpp; | |
| 699 | |
| 700 /* Perform the copy */ | |
| 701 w = area.w*screenbpp; | |
| 702 h = area.h; | |
| 703 while ( h-- ) { | |
| 704 memcpy(dst, src, w); | |
| 705 src += w; | |
| 706 dst += screen->pitch; | |
| 707 } | |
| 708 | |
| 709 /* Perform pixel conversion on cursor background */ | |
| 710 if ( src > SDL_cursor->save[1] ) { | |
| 711 SDL_ConvertCursorSave(screen, area.w, area.h); | |
| 712 } | |
| 713 } | |
| 714 } | |
| 715 | |
| 716 void SDL_EraseCursor(SDL_Surface *screen) | |
| 717 { | |
| 718 /* Lock the screen if necessary */ | |
| 719 if ( screen == NULL ) { | |
| 720 return; | |
| 721 } | |
| 722 if ( SDL_MUSTLOCK(screen) ) { | |
| 723 if ( SDL_LockSurface(screen) < 0 ) { | |
| 724 return; | |
| 725 } | |
| 726 } | |
| 727 | |
| 728 SDL_EraseCursorNoLock(screen); | |
| 729 | |
| 730 /* Unlock the screen and update if necessary */ | |
| 731 if ( SDL_MUSTLOCK(screen) ) { | |
| 732 SDL_UnlockSurface(screen); | |
| 733 } | |
| 734 if ( (screen == SDL_VideoSurface) && | |
| 735 ((screen->flags & SDL_HWSURFACE) != SDL_HWSURFACE) ) { | |
| 736 SDL_VideoDevice *video = current_video; | |
| 737 SDL_VideoDevice *this = current_video; | |
| 738 SDL_Rect area; | |
| 739 | |
| 740 SDL_MouseRect(&area); | |
|
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parents:
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changeset
|
741 if ( video->UpdateRects ) { |
|
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
|
742 video->UpdateRects(this, 1, &area); |
|
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
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changeset
|
743 } |
| 0 | 744 } |
| 745 } | |
| 746 | |
| 747 /* Reset the cursor on video mode change | |
| 748 FIXME: Keep track of all cursors, and reset them all. | |
| 749 */ | |
| 750 void SDL_ResetCursor(void) | |
| 751 { | |
| 752 int savelen; | |
| 753 | |
| 754 if ( SDL_cursor ) { | |
| 755 savelen = SDL_cursor->area.w*4*SDL_cursor->area.h; | |
| 756 SDL_cursor->area.x = 0; | |
| 757 SDL_cursor->area.y = 0; | |
| 758 memset(SDL_cursor->save[0], 0, savelen); | |
| 759 } | |
| 760 } |