1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 #include "SDL_config.h" 23 24 /* The high-level video driver subsystem */ 25 26 #include "SDL.h" 27 #include "SDL_sysvideo.h" 28 #include "SDL_blit.h" 29 #include "SDL_pixels_c.h" 30 #include "SDL_cursor_c.h" 31 #include "../events/SDL_sysevents.h" 32 #include "../events/SDL_events_c.h" 33 34 /* Available video drivers */ 35 static VideoBootStrap *bootstrap[] = { 36 #if SDL_VIDEO_DRIVER_QUARTZ 37 &QZ_bootstrap, 38 #endif 39 #if SDL_VIDEO_DRIVER_X11 40 &X11_bootstrap, 41 #endif 42 #if SDL_VIDEO_DRIVER_DGA 43 &DGA_bootstrap, 44 #endif 45 #if SDL_VIDEO_DRIVER_NANOX 46 &NX_bootstrap, 47 #endif 48 #if SDL_VIDEO_DRIVER_IPOD 49 &iPod_bootstrap, 50 #endif 51 #if SDL_VIDEO_DRIVER_QTOPIA 52 &Qtopia_bootstrap, 53 #endif 54 #if SDL_VIDEO_DRIVER_WSCONS 55 &WSCONS_bootstrap, 56 #endif 57 #if SDL_VIDEO_DRIVER_FBCON 58 &FBCON_bootstrap, 59 #endif 60 #if SDL_VIDEO_DRIVER_DIRECTFB 61 &DirectFB_bootstrap, 62 #endif 63 #if SDL_VIDEO_DRIVER_PS2GS 64 &PS2GS_bootstrap, 65 #endif 66 #if SDL_VIDEO_DRIVER_GGI 67 &GGI_bootstrap, 68 #endif 69 #if SDL_VIDEO_DRIVER_VGL 70 &VGL_bootstrap, 71 #endif 72 #if SDL_VIDEO_DRIVER_SVGALIB 73 &SVGALIB_bootstrap, 74 #endif 75 #if SDL_VIDEO_DRIVER_GAPI 76 &GAPI_bootstrap, 77 #endif 78 #if SDL_VIDEO_DRIVER_WINDIB 79 &WINDIB_bootstrap, 80 #endif 81 #if SDL_VIDEO_DRIVER_DDRAW 82 &DIRECTX_bootstrap, 83 #endif 84 #if SDL_VIDEO_DRIVER_BWINDOW 85 &BWINDOW_bootstrap, 86 #endif 87 #if SDL_VIDEO_DRIVER_TOOLBOX 88 &TOOLBOX_bootstrap, 89 #endif 90 #if SDL_VIDEO_DRIVER_DRAWSPROCKET 91 &DSp_bootstrap, 92 #endif 93 #if SDL_VIDEO_DRIVER_PHOTON 94 &ph_bootstrap, 95 #endif 96 #if SDL_VIDEO_DRIVER_EPOC 97 &EPOC_bootstrap, 98 #endif 99 #if SDL_VIDEO_DRIVER_XBIOS 100 &XBIOS_bootstrap, 101 #endif 102 #if SDL_VIDEO_DRIVER_GEM 103 &GEM_bootstrap, 104 #endif 105 #if SDL_VIDEO_DRIVER_PICOGUI 106 &PG_bootstrap, 107 #endif 108 #if SDL_VIDEO_DRIVER_DC 109 &DC_bootstrap, 110 #endif 111 #if SDL_VIDEO_DRIVER_NDS 112 &NDS_bootstrap, 113 #endif 114 #if SDL_VIDEO_DRIVER_RISCOS 115 &RISCOS_bootstrap, 116 #endif 117 #if SDL_VIDEO_DRIVER_OS2FS 118 &OS2FSLib_bootstrap, 119 #endif 120 #if SDL_VIDEO_DRIVER_AALIB 121 &AALIB_bootstrap, 122 #endif 123 #if SDL_VIDEO_DRIVER_DUMMY 124 &DUMMY_bootstrap, 125 #endif 126 NULL 127 }; 128 129 SDL_VideoDevice *current_video = NULL; 130 131 /* Various local functions */ 132 int SDL_VideoInit(const char *driver_name, Uint32 flags); 133 void SDL_VideoQuit(void); 134 void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect* rects); 135 136 static SDL_GrabMode SDL_WM_GrabInputOff(void); 137 #if SDL_VIDEO_OPENGL 138 static int lock_count = 0; 139 #endif 140 141 142 /* 143 * Initialize the video and event subsystems -- determine native pixel format 144 */ 145 int SDL_VideoInit (const char *driver_name, Uint32 flags) 146 { 147 SDL_VideoDevice *video; 148 int index; 149 int i; 150 SDL_PixelFormat vformat; 151 Uint32 video_flags; 152 153 /* Toggle the event thread flags, based on OS requirements */ 154 #if defined(MUST_THREAD_EVENTS) 155 flags |= SDL_INIT_EVENTTHREAD; 156 #elif defined(CANT_THREAD_EVENTS) 157 if ( (flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) { 158 SDL_SetError("OS doesn't support threaded events"); 159 return(-1); 160 } 161 #endif 162 163 /* Check to make sure we don't overwrite 'current_video' */ 164 if ( current_video != NULL ) { 165 SDL_VideoQuit(); 166 } 167 168 /* Select the proper video driver */ 169 index = 0; 170 video = NULL; 171 if ( driver_name != NULL ) { 172 #if 0 /* This will be replaced with a better driver selection API */ 173 if ( SDL_strrchr(driver_name, ':') != NULL ) { 174 index = atoi(SDL_strrchr(driver_name, ':')+1); 175 } 176 #endif 177 for ( i=0; bootstrap[i]; ++i ) { 178 if ( SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) { 179 if ( bootstrap[i]->available() ) { 180 video = bootstrap[i]->create(index); 181 break; 182 } 183 } 184 } 185 } else { 186 for ( i=0; bootstrap[i]; ++i ) { 187 if ( bootstrap[i]->available() ) { 188 video = bootstrap[i]->create(index); 189 if ( video != NULL ) { 190 break; 191 } 192 } 193 } 194 } 195 if ( video == NULL ) { 196 SDL_SetError("No available video device"); 197 return(-1); 198 } 199 current_video = video; 200 current_video->name = bootstrap[i]->name; 201 202 /* Do some basic variable initialization */ 203 video->screen = NULL; 204 video->shadow = NULL; 205 video->visible = NULL; 206 video->physpal = NULL; 207 video->gammacols = NULL; 208 video->gamma = NULL; 209 video->wm_title = NULL; 210 video->wm_icon = NULL; 211 video->offset_x = 0; 212 video->offset_y = 0; 213 SDL_memset(&video->info, 0, (sizeof video->info)); 214 215 video->displayformatalphapixel = NULL; 216 217 /* Set some very sane GL defaults */ 218 video->gl_config.driver_loaded = 0; 219 video->gl_config.dll_handle = NULL; 220 video->gl_config.red_size = 3; 221 video->gl_config.green_size = 3; 222 video->gl_config.blue_size = 2; 223 video->gl_config.alpha_size = 0; 224 video->gl_config.buffer_size = 0; 225 video->gl_config.depth_size = 16; 226 video->gl_config.stencil_size = 0; 227 video->gl_config.double_buffer = 1; 228 video->gl_config.accum_red_size = 0; 229 video->gl_config.accum_green_size = 0; 230 video->gl_config.accum_blue_size = 0; 231 video->gl_config.accum_alpha_size = 0; 232 video->gl_config.stereo = 0; 233 video->gl_config.multisamplebuffers = 0; 234 video->gl_config.multisamplesamples = 0; 235 video->gl_config.accelerated = -1; /* not known, don't set */ 236 video->gl_config.swap_control = -1; /* not known, don't set */ 237 238 /* Initialize the video subsystem */ 239 SDL_memset(&vformat, 0, sizeof(vformat)); 240 if ( video->VideoInit(video, &vformat) < 0 ) { 241 SDL_VideoQuit(); 242 return(-1); 243 } 244 245 /* Create a zero sized video surface of the appropriate format */ 246 video_flags = SDL_SWSURFACE; 247 SDL_VideoSurface = SDL_CreateRGBSurface(video_flags, 0, 0, 248 vformat.BitsPerPixel, 249 vformat.Rmask, vformat.Gmask, vformat.Bmask, 0); 250 if ( SDL_VideoSurface == NULL ) { 251 SDL_VideoQuit(); 252 return(-1); 253 } 254 SDL_PublicSurface = NULL; /* Until SDL_SetVideoMode() */ 255 256 #if 0 /* Don't change the current palette - may be used by other programs. 257 * The application can't do anything with the display surface until 258 * a video mode has been set anyway. :) 259 */ 260 /* If we have a palettized surface, create a default palette */ 261 if ( SDL_VideoSurface->format->palette ) { 262 SDL_PixelFormat *vf = SDL_VideoSurface->format; 263 SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel); 264 video->SetColors(video, 265 0, vf->palette->ncolors, vf->palette->colors); 266 } 267 #endif 268 video->info.vfmt = SDL_VideoSurface->format; 269 270 /* Start the event loop */ 271 if ( SDL_StartEventLoop(flags) < 0 ) { 272 SDL_VideoQuit(); 273 return(-1); 274 } 275 SDL_CursorInit(flags & SDL_INIT_EVENTTHREAD); 276 277 /* We're ready to go! */ 278 return(0); 279 } 280 281 char *SDL_VideoDriverName(char *namebuf, int maxlen) 282 { 283 if ( current_video != NULL ) { 284 SDL_strlcpy(namebuf, current_video->name, maxlen); 285 return(namebuf); 286 } 287 return(NULL); 288 } 289 290 /* 291 * Get the current display surface 292 */ 293 SDL_Surface *SDL_GetVideoSurface(void) 294 { 295 SDL_Surface *visible; 296 297 visible = NULL; 298 if ( current_video ) { 299 visible = current_video->visible; 300 } 301 return(visible); 302 } 303 304 /* 305 * Get the current information about the video hardware 306 */ 307 const SDL_VideoInfo *SDL_GetVideoInfo(void) 308 { 309 const SDL_VideoInfo *info; 310 311 info = NULL; 312 if ( current_video ) { 313 info = ¤t_video->info; 314 } 315 return(info); 316 } 317 318 /* 319 * Return a pointer to an array of available screen dimensions for the 320 * given format, sorted largest to smallest. Returns NULL if there are 321 * no dimensions available for a particular format, or (SDL_Rect **)-1 322 * if any dimension is okay for the given format. If 'format' is NULL, 323 * the mode list will be for the format given by SDL_GetVideoInfo()->vfmt 324 */ 325 SDL_Rect ** SDL_ListModes (SDL_PixelFormat *format, Uint32 flags) 326 { 327 SDL_VideoDevice *video = current_video; 328 SDL_VideoDevice *this = current_video; 329 SDL_Rect **modes; 330 331 modes = NULL; 332 if ( SDL_VideoSurface ) { 333 if ( format == NULL ) { 334 format = SDL_VideoSurface->format; 335 } 336 modes = video->ListModes(this, format, flags); 337 } 338 return(modes); 339 } 340 341 /* 342 * Check to see if a particular video mode is supported. 343 * It returns 0 if the requested mode is not supported under any bit depth, 344 * or returns the bits-per-pixel of the closest available mode with the 345 * given width and height. If this bits-per-pixel is different from the 346 * one used when setting the video mode, SDL_SetVideoMode() will succeed, 347 * but will emulate the requested bits-per-pixel with a shadow surface. 348 */ 349 static Uint8 SDL_closest_depths[4][8] = { 350 /* 8 bit closest depth ordering */ 351 { 0, 8, 16, 15, 32, 24, 0, 0 }, 352 /* 15,16 bit closest depth ordering */ 353 { 0, 16, 15, 32, 24, 8, 0, 0 }, 354 /* 24 bit closest depth ordering */ 355 { 0, 24, 32, 16, 15, 8, 0, 0 }, 356 /* 32 bit closest depth ordering */ 357 { 0, 32, 16, 15, 24, 8, 0, 0 } 358 }; 359 360 361 #ifdef __MACOS__ /* MPW optimization bug? */ 362 #define NEGATIVE_ONE 0xFFFFFFFF 363 #else 364 #define NEGATIVE_ONE -1 365 #endif 366 367 int SDL_VideoModeOK (int width, int height, int bpp, Uint32 flags) 368 { 369 int table, b, i; 370 int supported; 371 SDL_PixelFormat format; 372 SDL_Rect **sizes; 373 374 /* Currently 1 and 4 bpp are not supported */ 375 if ( bpp < 8 || bpp > 32 ) { 376 return(0); 377 } 378 if ( (width <= 0) || (height <= 0) ) { 379 return(0); 380 } 381 382 /* Search through the list valid of modes */ 383 SDL_memset(&format, 0, sizeof(format)); 384 supported = 0; 385 table = ((bpp+7)/8)-1; 386 SDL_closest_depths[table][0] = bpp; 387 SDL_closest_depths[table][7] = 0; 388 for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) { 389 format.BitsPerPixel = SDL_closest_depths[table][b]; 390 sizes = SDL_ListModes(&format, flags); 391 if ( sizes == (SDL_Rect **)0 ) { 392 /* No sizes supported at this bit-depth */ 393 continue; 394 } else 395 if (sizes == (SDL_Rect **)NEGATIVE_ONE) { 396 /* Any size supported at this bit-depth */ 397 supported = 1; 398 continue; 399 } else if (current_video->handles_any_size) { 400 /* Driver can center a smaller surface to simulate fullscreen */ 401 for ( i=0; sizes[i]; ++i ) { 402 if ((sizes[i]->w >= width) && (sizes[i]->h >= height)) { 403 supported = 1; /* this mode can fit the centered window. */ 404 break; 405 } 406 } 407 } else 408 for ( i=0; sizes[i]; ++i ) { 409 if ((sizes[i]->w == width) && (sizes[i]->h == height)) { 410 supported = 1; 411 break; 412 } 413 } 414 } 415 if ( supported ) { 416 --b; 417 return(SDL_closest_depths[table][b]); 418 } else { 419 return(0); 420 } 421 } 422 423 /* 424 * Get the closest non-emulated video mode to the one requested 425 */ 426 static int SDL_GetVideoMode (int *w, int *h, int *BitsPerPixel, Uint32 flags) 427 { 428 int table, b, i; 429 int supported; 430 int native_bpp; 431 SDL_PixelFormat format; 432 SDL_Rect **sizes; 433 434 /* Check parameters */ 435 if ( *BitsPerPixel < 8 || *BitsPerPixel > 32 ) { 436 SDL_SetError("Invalid bits per pixel (range is {8...32})"); 437 return(0); 438 } 439 if ((*w <= 0) || (*h <= 0)) { 440 SDL_SetError("Invalid width or height"); 441 return(0); 442 } 443 444 /* Try the original video mode, get the closest depth */ 445 native_bpp = SDL_VideoModeOK(*w, *h, *BitsPerPixel, flags); 446 if ( native_bpp == *BitsPerPixel ) { 447 return(1); 448 } 449 if ( native_bpp > 0 ) { 450 *BitsPerPixel = native_bpp; 451 return(1); 452 } 453 454 /* No exact size match at any depth, look for closest match */ 455 SDL_memset(&format, 0, sizeof(format)); 456 supported = 0; 457 table = ((*BitsPerPixel+7)/8)-1; 458 SDL_closest_depths[table][0] = *BitsPerPixel; 459 SDL_closest_depths[table][7] = SDL_VideoSurface->format->BitsPerPixel; 460 for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) { 461 int best; 462 463 format.BitsPerPixel = SDL_closest_depths[table][b]; 464 sizes = SDL_ListModes(&format, flags); 465 if ( sizes == (SDL_Rect **)0 ) { 466 /* No sizes supported at this bit-depth */ 467 continue; 468 } 469 best=0; 470 for ( i=0; sizes[i]; ++i ) { 471 /* Mode with both dimensions bigger or equal than asked ? */ 472 if ((sizes[i]->w >= *w) && (sizes[i]->h >= *h)) { 473 /* Mode with any dimension smaller or equal than current best ? */ 474 if ((sizes[i]->w <= sizes[best]->w) || (sizes[i]->h <= sizes[best]->h)) { 475 /* Now choose the mode that has less pixels */ 476 if ((sizes[i]->w * sizes[i]->h) <= (sizes[best]->w * sizes[best]->h)) { 477 best=i; 478 supported = 1; 479 } 480 } 481 } 482 } 483 if (supported) { 484 *w=sizes[best]->w; 485 *h=sizes[best]->h; 486 *BitsPerPixel = SDL_closest_depths[table][b]; 487 } 488 } 489 if ( ! supported ) { 490 SDL_SetError("No video mode large enough for %dx%d", *w, *h); 491 } 492 return(supported); 493 } 494 495 /* This should probably go somewhere else -- like SDL_surface.c */ 496 static void SDL_ClearSurface(SDL_Surface *surface) 497 { 498 Uint32 black; 499 500 black = SDL_MapRGB(surface->format, 0, 0, 0); 501 SDL_FillRect(surface, NULL, black); 502 if ((surface->flags&SDL_HWSURFACE) && (surface->flags&SDL_DOUBLEBUF)) { 503 SDL_Flip(surface); 504 SDL_FillRect(surface, NULL, black); 505 } 506 SDL_Flip(surface); 507 } 508 509 /* 510 * Create a shadow surface suitable for fooling the app. :-) 511 */ 512 static void SDL_CreateShadowSurface(int depth) 513 { 514 Uint32 Rmask, Gmask, Bmask; 515 516 /* Allocate the shadow surface */ 517 if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) { 518 Rmask = (SDL_VideoSurface->format)->Rmask; 519 Gmask = (SDL_VideoSurface->format)->Gmask; 520 Bmask = (SDL_VideoSurface->format)->Bmask; 521 } else { 522 Rmask = Gmask = Bmask = 0; 523 } 524 SDL_ShadowSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, 525 SDL_VideoSurface->w, SDL_VideoSurface->h, 526 depth, Rmask, Gmask, Bmask, 0); 527 if ( SDL_ShadowSurface == NULL ) { 528 return; 529 } 530 531 /* 8-bit shadow surfaces report that they have exclusive palette */ 532 if ( SDL_ShadowSurface->format->palette ) { 533 SDL_ShadowSurface->flags |= SDL_HWPALETTE; 534 if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) { 535 SDL_memcpy(SDL_ShadowSurface->format->palette->colors, 536 SDL_VideoSurface->format->palette->colors, 537 SDL_VideoSurface->format->palette->ncolors* 538 sizeof(SDL_Color)); 539 } else { 540 SDL_DitherColors( 541 SDL_ShadowSurface->format->palette->colors, depth); 542 } 543 } 544 545 /* If the video surface is resizable, the shadow should say so */ 546 if ( (SDL_VideoSurface->flags & SDL_RESIZABLE) == SDL_RESIZABLE ) { 547 SDL_ShadowSurface->flags |= SDL_RESIZABLE; 548 } 549 /* If the video surface has no frame, the shadow should say so */ 550 if ( (SDL_VideoSurface->flags & SDL_NOFRAME) == SDL_NOFRAME ) { 551 SDL_ShadowSurface->flags |= SDL_NOFRAME; 552 } 553 /* If the video surface is fullscreen, the shadow should say so */ 554 if ( (SDL_VideoSurface->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) { 555 SDL_ShadowSurface->flags |= SDL_FULLSCREEN; 556 } 557 /* If the video surface is flippable, the shadow should say so */ 558 if ( (SDL_VideoSurface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { 559 SDL_ShadowSurface->flags |= SDL_DOUBLEBUF; 560 } 561 return; 562 } 563 564 #ifdef __QNXNTO__ 565 #include <sys/neutrino.h> 566 #endif /* __QNXNTO__ */ 567 568 /* 569 * Set the requested video mode, allocating a shadow buffer if necessary. 570 */ 571 SDL_Surface * SDL_SetVideoMode (int width, int height, int bpp, Uint32 flags) 572 { 573 SDL_VideoDevice *video, *this; 574 SDL_Surface *prev_mode, *mode; 575 int video_w; 576 int video_h; 577 int video_bpp; 578 int is_opengl; 579 SDL_GrabMode saved_grab; 580 581 /* Start up the video driver, if necessary.. 582 WARNING: This is the only function protected this way! 583 */ 584 if ( ! current_video ) { 585 if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_NOPARACHUTE) < 0 ) { 586 return(NULL); 587 } 588 } 589 this = video = current_video; 590 591 /* Default to the current width and height */ 592 if ( width == 0 ) { 593 width = video->info.current_w; 594 } 595 if ( height == 0 ) { 596 height = video->info.current_h; 597 } 598 /* Default to the current video bpp */ 599 if ( bpp == 0 ) { 600 flags |= SDL_ANYFORMAT; 601 bpp = SDL_VideoSurface->format->BitsPerPixel; 602 } 603 604 /* Get a good video mode, the closest one possible */ 605 video_w = width; 606 video_h = height; 607 video_bpp = bpp; 608 if ( ! SDL_GetVideoMode(&video_w, &video_h, &video_bpp, flags) ) { 609 return(NULL); 610 } 611 612 /* Check the requested flags */ 613 /* There's no palette in > 8 bits-per-pixel mode */ 614 if ( video_bpp > 8 ) { 615 flags &= ~SDL_HWPALETTE; 616 } 617 #if 0 618 if ( (flags&SDL_FULLSCREEN) != SDL_FULLSCREEN ) { 619 /* There's no windowed double-buffering */ 620 flags &= ~SDL_DOUBLEBUF; 621 } 622 #endif 623 if ( (flags&SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { 624 /* Use hardware surfaces when double-buffering */ 625 flags |= SDL_HWSURFACE; 626 } 627 628 is_opengl = ( ( flags & SDL_OPENGL ) == SDL_OPENGL ); 629 if ( is_opengl ) { 630 /* These flags are for 2D video modes only */ 631 flags &= ~(SDL_HWSURFACE|SDL_DOUBLEBUF); 632 } 633 634 /* Reset the keyboard here so event callbacks can run */ 635 SDL_ResetKeyboard(); 636 SDL_ResetMouse(); 637 SDL_cursorstate &= ~CURSOR_USINGSW; 638 639 /* Clean up any previous video mode */ 640 if ( SDL_PublicSurface != NULL ) { 641 SDL_PublicSurface = NULL; 642 } 643 if ( SDL_ShadowSurface != NULL ) { 644 SDL_Surface *ready_to_go; 645 ready_to_go = SDL_ShadowSurface; 646 SDL_ShadowSurface = NULL; 647 SDL_FreeSurface(ready_to_go); 648 } 649 if ( video->physpal ) { 650 SDL_free(video->physpal->colors); 651 SDL_free(video->physpal); 652 video->physpal = NULL; 653 } 654 if( video->gammacols) { 655 SDL_free(video->gammacols); 656 video->gammacols = NULL; 657 } 658 659 /* Save the previous grab state and turn off grab for mode switch */ 660 saved_grab = SDL_WM_GrabInputOff(); 661 662 /* Try to set the video mode, along with offset and clipping */ 663 prev_mode = SDL_VideoSurface; 664 SDL_LockCursor(); 665 SDL_VideoSurface = NULL; /* In case it's freed by driver */ 666 mode = video->SetVideoMode(this, prev_mode,video_w,video_h,video_bpp,flags); 667 if ( mode ) { /* Prevent resize events from mode change */ 668 /* But not on OS/2 */ 669 #ifndef __OS2__ 670 SDL_PrivateResize(mode->w, mode->h); 671 #endif 672 673 /* Sam - If we asked for OpenGL mode, and didn't get it, fail */ 674 if ( is_opengl && !(mode->flags & SDL_OPENGL) ) { 675 mode = NULL; 676 SDL_SetError("OpenGL not available"); 677 } 678 } 679 /* 680 * rcg11292000 681 * If you try to set an SDL_OPENGL surface, and fail to find a 682 * matching visual, then the next call to SDL_SetVideoMode() 683 * will segfault, since we no longer point to a dummy surface, 684 * but rather NULL. 685 * Sam 11/29/00 686 * WARNING, we need to make sure that the previous mode hasn't 687 * already been freed by the video driver. What do we do in 688 * that case? Should we call SDL_VideoInit() again? 689 */ 690 SDL_VideoSurface = (mode != NULL) ? mode : prev_mode; 691 692 if ( (mode != NULL) && (!is_opengl) ) { 693 /* Sanity check */ 694 if ( (mode->w < width) || (mode->h < height) ) { 695 SDL_SetError("Video mode smaller than requested"); 696 return(NULL); 697 } 698 699 /* If we have a palettized surface, create a default palette */ 700 if ( mode->format->palette ) { 701 SDL_PixelFormat *vf = mode->format; 702 SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel); 703 video->SetColors(this, 0, vf->palette->ncolors, 704 vf->palette->colors); 705 } 706 707 /* Clear the surface to black */ 708 video->offset_x = 0; 709 video->offset_y = 0; 710 mode->offset = 0; 711 SDL_SetClipRect(mode, NULL); 712 SDL_ClearSurface(mode); 713 714 /* Now adjust the offsets to match the desired mode */ 715 video->offset_x = (mode->w-width)/2; 716 video->offset_y = (mode->h-height)/2; 717 mode->offset = video->offset_y*mode->pitch + 718 video->offset_x*mode->format->BytesPerPixel; 719 #ifdef DEBUG_VIDEO 720 fprintf(stderr, 721 "Requested mode: %dx%dx%d, obtained mode %dx%dx%d (offset %d)\n", 722 width, height, bpp, 723 mode->w, mode->h, mode->format->BitsPerPixel, mode->offset); 724 #endif 725 mode->w = width; 726 mode->h = height; 727 SDL_SetClipRect(mode, NULL); 728 } 729 SDL_ResetCursor(); 730 SDL_UnlockCursor(); 731 732 /* If we failed setting a video mode, return NULL... (Uh Oh!) */ 733 if ( mode == NULL ) { 734 return(NULL); 735 } 736 737 /* If there is no window manager, set the SDL_NOFRAME flag */ 738 if ( ! video->info.wm_available ) { 739 mode->flags |= SDL_NOFRAME; 740 } 741 742 /* Reset the mouse cursor and grab for new video mode */ 743 SDL_SetCursor(NULL); 744 if ( video->UpdateMouse ) { 745 video->UpdateMouse(this); 746 } 747 SDL_WM_GrabInput(saved_grab); 748 SDL_GetRelativeMouseState(NULL, NULL); /* Clear first large delta */ 749 750 #if SDL_VIDEO_OPENGL 751 /* Load GL symbols (before MakeCurrent, where we need glGetString). */ 752 if ( flags & (SDL_OPENGL | SDL_OPENGLBLIT) ) { 753 754 #if defined(__QNXNTO__) && (_NTO_VERSION < 630) 755 #define __SDL_NOGETPROCADDR__ 756 #elif defined(__MINT__) 757 #define __SDL_NOGETPROCADDR__ 758 #endif 759 #ifdef __SDL_NOGETPROCADDR__ 760 #define SDL_PROC(ret,func,params) video->func=func; 761 #else 762 #define SDL_PROC(ret,func,params) \ 763 do { \ 764 video->func = SDL_GL_GetProcAddress(#func); \ 765 if ( ! video->func ) { \ 766 SDL_SetError("Couldn't load GL function %s: %s\n", #func, SDL_GetError()); \ 767 return(NULL); \ 768 } \ 769 } while ( 0 ); 770 771 #endif /* __SDL_NOGETPROCADDR__ */ 772 773 #include "SDL_glfuncs.h" 774 #undef SDL_PROC 775 } 776 #endif /* SDL_VIDEO_OPENGL */ 777 778 /* If we're running OpenGL, make the context current */ 779 if ( (video->screen->flags & SDL_OPENGL) && 780 video->GL_MakeCurrent ) { 781 if ( video->GL_MakeCurrent(this) < 0 ) { 782 return(NULL); 783 } 784 } 785 786 /* Set up a fake SDL surface for OpenGL "blitting" */ 787 if ( (flags & SDL_OPENGLBLIT) == SDL_OPENGLBLIT ) { 788 /* Load GL functions for performing the texture updates */ 789 #if SDL_VIDEO_OPENGL 790 791 /* Create a software surface for blitting */ 792 #ifdef GL_VERSION_1_2 793 /* If the implementation either supports the packed pixels 794 extension, or implements the core OpenGL 1.2 API, it will 795 support the GL_UNSIGNED_SHORT_5_6_5 texture format. 796 */ 797 if ( (bpp == 16) && 798 (SDL_strstr((const char *)video->glGetString(GL_EXTENSIONS), "GL_EXT_packed_pixels") || 799 (SDL_atof((const char *)video->glGetString(GL_VERSION)) >= 1.2f)) 800 ) { 801 video->is_32bit = 0; 802 SDL_VideoSurface = SDL_CreateRGBSurface( 803 flags, 804 width, 805 height, 806 16, 807 31 << 11, 808 63 << 5, 809 31, 810 0 811 ); 812 } 813 else 814 #endif /* OpenGL 1.2 */ 815 { 816 video->is_32bit = 1; 817 SDL_VideoSurface = SDL_CreateRGBSurface( 818 flags, 819 width, 820 height, 821 32, 822 #if SDL_BYTEORDER == SDL_LIL_ENDIAN 823 0x000000FF, 824 0x0000FF00, 825 0x00FF0000, 826 0xFF000000 827 #else 828 0xFF000000, 829 0x00FF0000, 830 0x0000FF00, 831 0x000000FF 832 #endif 833 ); 834 } 835 if ( ! SDL_VideoSurface ) { 836 return(NULL); 837 } 838 SDL_VideoSurface->flags = mode->flags | SDL_OPENGLBLIT; 839 840 /* Free the original video mode surface (is this safe?) */ 841 SDL_FreeSurface(mode); 842 843 /* Set the surface completely opaque & white by default */ 844 SDL_memset( SDL_VideoSurface->pixels, 255, SDL_VideoSurface->h * SDL_VideoSurface->pitch ); 845 video->glGenTextures( 1, &video->texture ); 846 video->glBindTexture( GL_TEXTURE_2D, video->texture ); 847 video->glTexImage2D( 848 GL_TEXTURE_2D, 849 0, 850 video->is_32bit ? GL_RGBA : GL_RGB, 851 256, 852 256, 853 0, 854 video->is_32bit ? GL_RGBA : GL_RGB, 855 #ifdef GL_VERSION_1_2 856 video->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5, 857 #else 858 GL_UNSIGNED_BYTE, 859 #endif 860 NULL); 861 862 video->UpdateRects = SDL_GL_UpdateRectsLock; 863 #else 864 SDL_SetError("Somebody forgot to #define SDL_VIDEO_OPENGL"); 865 return(NULL); 866 #endif 867 } 868 869 /* Create a shadow surface if necessary */ 870 /* There are three conditions under which we create a shadow surface: 871 1. We need a particular bits-per-pixel that we didn't get. 872 2. We need a hardware palette and didn't get one. 873 3. We need a software surface and got a hardware surface. 874 */ 875 if ( !(SDL_VideoSurface->flags & SDL_OPENGL) && 876 ( 877 ( !(flags&SDL_ANYFORMAT) && 878 (SDL_VideoSurface->format->BitsPerPixel != bpp)) || 879 ( (flags&SDL_HWPALETTE) && 880 !(SDL_VideoSurface->flags&SDL_HWPALETTE)) || 881 /* If the surface is in hardware, video writes are visible 882 as soon as they are performed, so we need to buffer them 883 */ 884 ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) && 885 (SDL_VideoSurface->flags&SDL_HWSURFACE)) || 886 ( (flags&SDL_DOUBLEBUF) && 887 (SDL_VideoSurface->flags&SDL_HWSURFACE) && 888 !(SDL_VideoSurface->flags&SDL_DOUBLEBUF)) 889 ) ) { 890 SDL_CreateShadowSurface(bpp); 891 if ( SDL_ShadowSurface == NULL ) { 892 SDL_SetError("Couldn't create shadow surface"); 893 return(NULL); 894 } 895 SDL_PublicSurface = SDL_ShadowSurface; 896 } else { 897 SDL_PublicSurface = SDL_VideoSurface; 898 } 899 video->info.vfmt = SDL_VideoSurface->format; 900 video->info.current_w = SDL_VideoSurface->w; 901 video->info.current_h = SDL_VideoSurface->h; 902 903 /* We're done! */ 904 return(SDL_PublicSurface); 905 } 906 907 /* 908 * Convert a surface into the video pixel format. 909 */ 910 SDL_Surface * SDL_DisplayFormat (SDL_Surface *surface) 911 { 912 Uint32 flags; 913 914 if ( ! SDL_PublicSurface ) { 915 SDL_SetError("No video mode has been set"); 916 return(NULL); 917 } 918 /* Set the flags appropriate for copying to display surface */ 919 if (((SDL_PublicSurface->flags&SDL_HWSURFACE) == SDL_HWSURFACE) && current_video->info.blit_hw) 920 flags = SDL_HWSURFACE; 921 else 922 flags = SDL_SWSURFACE; 923 #ifdef AUTORLE_DISPLAYFORMAT 924 flags |= (surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA)); 925 flags |= SDL_RLEACCELOK; 926 #else 927 flags |= surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA|SDL_RLEACCELOK); 928 #endif 929 return(SDL_ConvertSurface(surface, SDL_PublicSurface->format, flags)); 930 } 931 932 /* 933 * Convert a surface into a format that's suitable for blitting to 934 * the screen, but including an alpha channel. 935 */ 936 SDL_Surface *SDL_DisplayFormatAlpha(SDL_Surface *surface) 937 { 938 SDL_PixelFormat *vf; 939 SDL_PixelFormat *format; 940 SDL_Surface *converted; 941 Uint32 flags; 942 /* default to ARGB8888 */ 943 Uint32 amask = 0xff000000; 944 Uint32 rmask = 0x00ff0000; 945 Uint32 gmask = 0x0000ff00; 946 Uint32 bmask = 0x000000ff; 947 948 if ( ! SDL_PublicSurface ) { 949 SDL_SetError("No video mode has been set"); 950 return(NULL); 951 } 952 vf = SDL_PublicSurface->format; 953 954 switch(vf->BytesPerPixel) { 955 case 2: 956 /* For XGY5[56]5, use, AXGY8888, where {X, Y} = {R, B}. 957 For anything else (like ARGB4444) it doesn't matter 958 since we have no special code for it anyway */ 959 if ( (vf->Rmask == 0x1f) && 960 (vf->Bmask == 0xf800 || vf->Bmask == 0x7c00)) { 961 rmask = 0xff; 962 bmask = 0xff0000; 963 } 964 break; 965 966 case 3: 967 case 4: 968 /* Keep the video format, as long as the high 8 bits are 969 unused or alpha */ 970 if ( (vf->Rmask == 0xff) && (vf->Bmask == 0xff0000) ) { 971 rmask = 0xff; 972 bmask = 0xff0000; 973 } 974 break; 975 976 default: 977 /* We have no other optimised formats right now. When/if a new 978 optimised alpha format is written, add the converter here */ 979 break; 980 } 981 format = SDL_AllocFormat(32, rmask, gmask, bmask, amask); 982 flags = SDL_PublicSurface->flags & SDL_HWSURFACE; 983 flags |= surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK); 984 converted = SDL_ConvertSurface(surface, format, flags); 985 SDL_FreeFormat(format); 986 return(converted); 987 } 988 989 /* 990 * Update a specific portion of the physical screen 991 */ 992 void SDL_UpdateRect(SDL_Surface *screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h) 993 { 994 if ( screen ) { 995 SDL_Rect rect; 996 997 /* Perform some checking */ 998 if ( w == 0 ) 999 w = screen->w; 1000 if ( h == 0 ) 1001 h = screen->h; 1002 if ( (int)(x+w) > screen->w ) 1003 return; 1004 if ( (int)(y+h) > screen->h ) 1005 return; 1006 1007 /* Fill the rectangle */ 1008 rect.x = (Sint16)x; 1009 rect.y = (Sint16)y; 1010 rect.w = (Uint16)w; 1011 rect.h = (Uint16)h; 1012 SDL_UpdateRects(screen, 1, &rect); 1013 } 1014 } 1015 void SDL_UpdateRects (SDL_Surface *screen, int numrects, SDL_Rect *rects) 1016 { 1017 int i; 1018 SDL_VideoDevice *video = current_video; 1019 SDL_VideoDevice *this = current_video; 1020 1021 if ( (screen->flags & (SDL_OPENGL | SDL_OPENGLBLIT)) == SDL_OPENGL ) { 1022 SDL_SetError("OpenGL active, use SDL_GL_SwapBuffers()"); 1023 return; 1024 } 1025 if ( screen == SDL_ShadowSurface ) { 1026 /* Blit the shadow surface using saved mapping */ 1027 SDL_Palette *pal = screen->format->palette; 1028 SDL_Color *saved_colors = NULL; 1029 if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) { 1030 /* simulated 8bpp, use correct physical palette */ 1031 saved_colors = pal->colors; 1032 if ( video->gammacols ) { 1033 /* gamma-corrected palette */ 1034 pal->colors = video->gammacols; 1035 } else if ( video->physpal ) { 1036 /* physical palette different from logical */ 1037 pal->colors = video->physpal->colors; 1038 } 1039 } 1040 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { 1041 SDL_LockCursor(); 1042 SDL_DrawCursor(SDL_ShadowSurface); 1043 for ( i=0; i<numrects; ++i ) { 1044 SDL_LowerBlit(SDL_ShadowSurface, &rects[i], 1045 SDL_VideoSurface, &rects[i]); 1046 } 1047 SDL_EraseCursor(SDL_ShadowSurface); 1048 SDL_UnlockCursor(); 1049 } else { 1050 for ( i=0; i<numrects; ++i ) { 1051 SDL_LowerBlit(SDL_ShadowSurface, &rects[i], 1052 SDL_VideoSurface, &rects[i]); 1053 } 1054 } 1055 if ( saved_colors ) { 1056 pal->colors = saved_colors; 1057 } 1058 1059 /* Fall through to video surface update */ 1060 screen = SDL_VideoSurface; 1061 } 1062 if ( screen == SDL_VideoSurface ) { 1063 /* Update the video surface */ 1064 if ( screen->offset ) { 1065 for ( i=0; i<numrects; ++i ) { 1066 rects[i].x += video->offset_x; 1067 rects[i].y += video->offset_y; 1068 } 1069 video->UpdateRects(this, numrects, rects); 1070 for ( i=0; i<numrects; ++i ) { 1071 rects[i].x -= video->offset_x; 1072 rects[i].y -= video->offset_y; 1073 } 1074 } else { 1075 video->UpdateRects(this, numrects, rects); 1076 } 1077 } 1078 } 1079 1080 /* 1081 * Performs hardware double buffering, if possible, or a full update if not. 1082 */ 1083 int SDL_Flip(SDL_Surface *screen) 1084 { 1085 SDL_VideoDevice *video = current_video; 1086 /* Copy the shadow surface to the video surface */ 1087 if ( screen == SDL_ShadowSurface ) { 1088 SDL_Rect rect; 1089 SDL_Palette *pal = screen->format->palette; 1090 SDL_Color *saved_colors = NULL; 1091 if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) { 1092 /* simulated 8bpp, use correct physical palette */ 1093 saved_colors = pal->colors; 1094 if ( video->gammacols ) { 1095 /* gamma-corrected palette */ 1096 pal->colors = video->gammacols; 1097 } else if ( video->physpal ) { 1098 /* physical palette different from logical */ 1099 pal->colors = video->physpal->colors; 1100 } 1101 } 1102 1103 rect.x = 0; 1104 rect.y = 0; 1105 rect.w = screen->w; 1106 rect.h = screen->h; 1107 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { 1108 SDL_LockCursor(); 1109 SDL_DrawCursor(SDL_ShadowSurface); 1110 SDL_LowerBlit(SDL_ShadowSurface, &rect, 1111 SDL_VideoSurface, &rect); 1112 SDL_EraseCursor(SDL_ShadowSurface); 1113 SDL_UnlockCursor(); 1114 } else { 1115 SDL_LowerBlit(SDL_ShadowSurface, &rect, 1116 SDL_VideoSurface, &rect); 1117 } 1118 if ( saved_colors ) { 1119 pal->colors = saved_colors; 1120 } 1121 1122 /* Fall through to video surface update */ 1123 screen = SDL_VideoSurface; 1124 } 1125 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { 1126 SDL_VideoDevice *this = current_video; 1127 return(video->FlipHWSurface(this, SDL_VideoSurface)); 1128 } else { 1129 SDL_UpdateRect(screen, 0, 0, 0, 0); 1130 } 1131 return(0); 1132 } 1133 1134 static void SetPalette_logical(SDL_Surface *screen, SDL_Color *colors, 1135 int firstcolor, int ncolors) 1136 { 1137 SDL_Palette *pal = screen->format->palette; 1138 SDL_Palette *vidpal; 1139 1140 if ( colors != (pal->colors + firstcolor) ) { 1141 SDL_memcpy(pal->colors + firstcolor, colors, 1142 ncolors * sizeof(*colors)); 1143 } 1144 1145 if ( current_video && SDL_VideoSurface ) { 1146 vidpal = SDL_VideoSurface->format->palette; 1147 if ( (screen == SDL_ShadowSurface) && vidpal ) { 1148 /* 1149 * This is a shadow surface, and the physical 1150 * framebuffer is also indexed. Propagate the 1151 * changes to its logical palette so that 1152 * updates are always identity blits 1153 */ 1154 SDL_memcpy(vidpal->colors + firstcolor, colors, 1155 ncolors * sizeof(*colors)); 1156 } 1157 } 1158 SDL_FormatChanged(screen); 1159 } 1160 1161 static int SetPalette_physical(SDL_Surface *screen, 1162 SDL_Color *colors, int firstcolor, int ncolors) 1163 { 1164 SDL_VideoDevice *video = current_video; 1165 int gotall = 1; 1166 1167 if ( video->physpal ) { 1168 /* We need to copy the new colors, since we haven't 1169 * already done the copy in the logical set above. 1170 */ 1171 SDL_memcpy(video->physpal->colors + firstcolor, 1172 colors, ncolors * sizeof(*colors)); 1173 } 1174 if ( screen == SDL_ShadowSurface ) { 1175 if ( SDL_VideoSurface->flags & SDL_HWPALETTE ) { 1176 /* 1177 * The real screen is also indexed - set its physical 1178 * palette. The physical palette does not include the 1179 * gamma modification, we apply it directly instead, 1180 * but this only happens if we have hardware palette. 1181 */ 1182 screen = SDL_VideoSurface; 1183 } else { 1184 /* 1185 * The video surface is not indexed - invalidate any 1186 * active shadow-to-video blit mappings. 1187 */ 1188 if ( screen->map->dst == SDL_VideoSurface ) { 1189 SDL_InvalidateMap(screen->map); 1190 } 1191 if ( video->gamma ) { 1192 if( ! video->gammacols ) { 1193 SDL_Palette *pp = video->physpal; 1194 if(!pp) 1195 pp = screen->format->palette; 1196 video->gammacols = SDL_malloc(pp->ncolors 1197 * sizeof(SDL_Color)); 1198 SDL_ApplyGamma(video->gamma, 1199 pp->colors, 1200 video->gammacols, 1201 pp->ncolors); 1202 } else { 1203 SDL_ApplyGamma(video->gamma, colors, 1204 video->gammacols 1205 + firstcolor, 1206 ncolors); 1207 } 1208 } 1209 SDL_UpdateRect(screen, 0, 0, 0, 0); 1210 } 1211 } 1212 1213 if ( screen == SDL_VideoSurface ) { 1214 SDL_Color gcolors[256]; 1215 1216 if ( video->gamma ) { 1217 SDL_ApplyGamma(video->gamma, colors, gcolors, ncolors); 1218 colors = gcolors; 1219 } 1220 gotall = video->SetColors(video, firstcolor, ncolors, colors); 1221 if ( ! gotall ) { 1222 /* The video flags shouldn't have SDL_HWPALETTE, and 1223 the video driver is responsible for copying back the 1224 correct colors into the video surface palette. 1225 */ 1226 ; 1227 } 1228 SDL_CursorPaletteChanged(); 1229 } 1230 return gotall; 1231 } 1232 1233 /* 1234 * Set the physical and/or logical colormap of a surface: 1235 * Only the screen has a physical colormap. It determines what is actually 1236 * sent to the display. 1237 * The logical colormap is used to map blits to/from the surface. 1238 * 'which' is one or both of SDL_LOGPAL, SDL_PHYSPAL 1239 * 1240 * Return nonzero if all colours were set as requested, or 0 otherwise. 1241 */ 1242 int SDL_SetPalette(SDL_Surface *screen, int which, 1243 SDL_Color *colors, int firstcolor, int ncolors) 1244 { 1245 SDL_Palette *pal; 1246 int gotall; 1247 int palsize; 1248 1249 if ( !screen ) { 1250 return 0; 1251 } 1252 if ( !current_video || screen != SDL_PublicSurface ) { 1253 /* only screens have physical palettes */ 1254 which &= ~SDL_PHYSPAL; 1255 } else if ( (screen->flags & SDL_HWPALETTE) != SDL_HWPALETTE ) { 1256 /* hardware palettes required for split colormaps */ 1257 which |= SDL_PHYSPAL | SDL_LOGPAL; 1258 } 1259 1260 /* Verify the parameters */ 1261 pal = screen->format->palette; 1262 if( !pal ) { 1263 return 0; /* not a palettized surface */ 1264 } 1265 gotall = 1; 1266 palsize = 1 << screen->format->BitsPerPixel; 1267 if ( ncolors > (palsize - firstcolor) ) { 1268 ncolors = (palsize - firstcolor); 1269 gotall = 0; 1270 } 1271 1272 if ( which & SDL_LOGPAL ) { 1273 /* 1274 * Logical palette change: The actual screen isn't affected, 1275 * but the internal colormap is altered so that the 1276 * interpretation of the pixel values (for blits etc) is 1277 * changed. 1278 */ 1279 SetPalette_logical(screen, colors, firstcolor, ncolors); 1280 } 1281 if ( which & SDL_PHYSPAL ) { 1282 SDL_VideoDevice *video = current_video; 1283 /* 1284 * Physical palette change: This doesn't affect the 1285 * program's idea of what the screen looks like, but changes 1286 * its actual appearance. 1287 */ 1288 if ( !video->physpal && !(which & SDL_LOGPAL) ) { 1289 /* Lazy physical palette allocation */ 1290 int size; 1291 SDL_Palette *pp = SDL_malloc(sizeof(*pp)); 1292 if ( !pp ) { 1293 return 0; 1294 } 1295 video->physpal = pp; 1296 pp->ncolors = pal->ncolors; 1297 size = pp->ncolors * sizeof(SDL_Color); 1298 pp->colors = SDL_malloc(size); 1299 if ( !pp->colors ) { 1300 return 0; 1301 } 1302 SDL_memcpy(pp->colors, pal->colors, size); 1303 } 1304 if ( ! SetPalette_physical(screen, 1305 colors, firstcolor, ncolors) ) { 1306 gotall = 0; 1307 } 1308 } 1309 return gotall; 1310 } 1311 1312 int SDL_SetColors(SDL_Surface *screen, SDL_Color *colors, int firstcolor, 1313 int ncolors) 1314 { 1315 return SDL_SetPalette(screen, SDL_LOGPAL | SDL_PHYSPAL, 1316 colors, firstcolor, ncolors); 1317 } 1318 1319 /* 1320 * Clean up the video subsystem 1321 */ 1322 void SDL_VideoQuit (void) 1323 { 1324 SDL_Surface *ready_to_go; 1325 1326 if ( current_video ) { 1327 SDL_VideoDevice *video = current_video; 1328 SDL_VideoDevice *this = current_video; 1329 1330 /* Halt event processing before doing anything else */ 1331 SDL_StopEventLoop(); 1332 1333 /* Clean up allocated window manager items */ 1334 if ( SDL_PublicSurface ) { 1335 SDL_PublicSurface = NULL; 1336 } 1337 SDL_CursorQuit(); 1338 1339 /* Just in case... */ 1340 SDL_WM_GrabInputOff(); 1341 1342 /* Clean up the system video */ 1343 video->VideoQuit(this); 1344 1345 /* Free any lingering surfaces */ 1346 ready_to_go = SDL_ShadowSurface; 1347 SDL_ShadowSurface = NULL; 1348 SDL_FreeSurface(ready_to_go); 1349 if ( SDL_VideoSurface != NULL ) { 1350 ready_to_go = SDL_VideoSurface; 1351 SDL_VideoSurface = NULL; 1352 SDL_FreeSurface(ready_to_go); 1353 } 1354 SDL_PublicSurface = NULL; 1355 1356 /* Clean up miscellaneous memory */ 1357 if ( video->physpal ) { 1358 SDL_free(video->physpal->colors); 1359 SDL_free(video->physpal); 1360 video->physpal = NULL; 1361 } 1362 if ( video->gammacols ) { 1363 SDL_free(video->gammacols); 1364 video->gammacols = NULL; 1365 } 1366 if ( video->gamma ) { 1367 SDL_free(video->gamma); 1368 video->gamma = NULL; 1369 } 1370 if ( video->wm_title != NULL ) { 1371 SDL_free(video->wm_title); 1372 video->wm_title = NULL; 1373 } 1374 if ( video->wm_icon != NULL ) { 1375 SDL_free(video->wm_icon); 1376 video->wm_icon = NULL; 1377 } 1378 1379 /* Finish cleaning up video subsystem */ 1380 video->free(this); 1381 current_video = NULL; 1382 } 1383 return; 1384 } 1385 1386 /* Load the GL driver library */ 1387 int SDL_GL_LoadLibrary(const char *path) 1388 { 1389 SDL_VideoDevice *video = current_video; 1390 SDL_VideoDevice *this = current_video; 1391 int retval; 1392 1393 retval = -1; 1394 if ( video == NULL ) { 1395 SDL_SetError("Video subsystem has not been initialized"); 1396 } else { 1397 if ( video->GL_LoadLibrary ) { 1398 retval = video->GL_LoadLibrary(this, path); 1399 } else { 1400 SDL_SetError("No dynamic GL support in video driver"); 1401 } 1402 } 1403 return(retval); 1404 } 1405 1406 void *SDL_GL_GetProcAddress(const char* proc) 1407 { 1408 SDL_VideoDevice *video = current_video; 1409 SDL_VideoDevice *this = current_video; 1410 void *func; 1411 1412 func = NULL; 1413 if ( video->GL_GetProcAddress ) { 1414 if ( video->gl_config.driver_loaded ) { 1415 func = video->GL_GetProcAddress(this, proc); 1416 } else { 1417 SDL_SetError("No GL driver has been loaded"); 1418 } 1419 } else { 1420 SDL_SetError("No dynamic GL support in video driver"); 1421 } 1422 return func; 1423 } 1424 1425 /* Set the specified GL attribute for setting up a GL video mode */ 1426 int SDL_GL_SetAttribute( SDL_GLattr attr, int value ) 1427 { 1428 int retval; 1429 SDL_VideoDevice *video = current_video; 1430 1431 retval = 0; 1432 switch (attr) { 1433 case SDL_GL_RED_SIZE: 1434 video->gl_config.red_size = value; 1435 break; 1436 case SDL_GL_GREEN_SIZE: 1437 video->gl_config.green_size = value; 1438 break; 1439 case SDL_GL_BLUE_SIZE: 1440 video->gl_config.blue_size = value; 1441 break; 1442 case SDL_GL_ALPHA_SIZE: 1443 video->gl_config.alpha_size = value; 1444 break; 1445 case SDL_GL_DOUBLEBUFFER: 1446 video->gl_config.double_buffer = value; 1447 break; 1448 case SDL_GL_BUFFER_SIZE: 1449 video->gl_config.buffer_size = value; 1450 break; 1451 case SDL_GL_DEPTH_SIZE: 1452 video->gl_config.depth_size = value; 1453 break; 1454 case SDL_GL_STENCIL_SIZE: 1455 video->gl_config.stencil_size = value; 1456 break; 1457 case SDL_GL_ACCUM_RED_SIZE: 1458 video->gl_config.accum_red_size = value; 1459 break; 1460 case SDL_GL_ACCUM_GREEN_SIZE: 1461 video->gl_config.accum_green_size = value; 1462 break; 1463 case SDL_GL_ACCUM_BLUE_SIZE: 1464 video->gl_config.accum_blue_size = value; 1465 break; 1466 case SDL_GL_ACCUM_ALPHA_SIZE: 1467 video->gl_config.accum_alpha_size = value; 1468 break; 1469 case SDL_GL_STEREO: 1470 video->gl_config.stereo = value; 1471 break; 1472 case SDL_GL_MULTISAMPLEBUFFERS: 1473 video->gl_config.multisamplebuffers = value; 1474 break; 1475 case SDL_GL_MULTISAMPLESAMPLES: 1476 video->gl_config.multisamplesamples = value; 1477 break; 1478 case SDL_GL_ACCELERATED_VISUAL: 1479 video->gl_config.accelerated = value; 1480 break; 1481 case SDL_GL_SWAP_CONTROL: 1482 video->gl_config.swap_control = value; 1483 break; 1484 default: 1485 SDL_SetError("Unknown OpenGL attribute"); 1486 retval = -1; 1487 break; 1488 } 1489 return(retval); 1490 } 1491 1492 /* Retrieve an attribute value from the windowing system. */ 1493 int SDL_GL_GetAttribute(SDL_GLattr attr, int* value) 1494 { 1495 int retval = -1; 1496 SDL_VideoDevice* video = current_video; 1497 SDL_VideoDevice* this = current_video; 1498 1499 if ( video->GL_GetAttribute ) { 1500 retval = this->GL_GetAttribute(this, attr, value); 1501 } else { 1502 *value = 0; 1503 SDL_SetError("GL_GetAttribute not supported"); 1504 } 1505 return retval; 1506 } 1507 1508 /* Perform a GL buffer swap on the current GL context */ 1509 void SDL_GL_SwapBuffers(void) 1510 { 1511 SDL_VideoDevice *video = current_video; 1512 SDL_VideoDevice *this = current_video; 1513 1514 if ( video->screen->flags & SDL_OPENGL ) { 1515 video->GL_SwapBuffers(this); 1516 } else { 1517 SDL_SetError("OpenGL video mode has not been set"); 1518 } 1519 } 1520 1521 /* Update rects with locking */ 1522 void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect *rects) 1523 { 1524 SDL_GL_Lock(); 1525 SDL_GL_UpdateRects(numrects, rects); 1526 SDL_GL_Unlock(); 1527 } 1528 1529 /* Update rects without state setting and changing (the caller is responsible for it) */ 1530 void SDL_GL_UpdateRects(int numrects, SDL_Rect *rects) 1531 { 1532 #if SDL_VIDEO_OPENGL 1533 SDL_VideoDevice *this = current_video; 1534 SDL_Rect update, tmp; 1535 int x, y, i; 1536 1537 for ( i = 0; i < numrects; i++ ) 1538 { 1539 tmp.y = rects[i].y; 1540 tmp.h = rects[i].h; 1541 for ( y = 0; y <= rects[i].h / 256; y++ ) 1542 { 1543 tmp.x = rects[i].x; 1544 tmp.w = rects[i].w; 1545 for ( x = 0; x <= rects[i].w / 256; x++ ) 1546 { 1547 update.x = tmp.x; 1548 update.y = tmp.y; 1549 update.w = tmp.w; 1550 update.h = tmp.h; 1551 1552 if ( update.w > 256 ) 1553 update.w = 256; 1554 1555 if ( update.h > 256 ) 1556 update.h = 256; 1557 1558 this->glFlush(); 1559 this->glTexSubImage2D( 1560 GL_TEXTURE_2D, 1561 0, 1562 0, 1563 0, 1564 update.w, 1565 update.h, 1566 this->is_32bit? GL_RGBA : GL_RGB, 1567 #ifdef GL_VERSION_1_2 1568 this->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5, 1569 #else 1570 GL_UNSIGNED_BYTE, 1571 #endif 1572 (Uint8 *)this->screen->pixels + 1573 this->screen->format->BytesPerPixel * update.x + 1574 update.y * this->screen->pitch ); 1575 1576 this->glFlush(); 1577 /* 1578 * Note the parens around the function name: 1579 * This is because some OpenGL implementations define glTexCoord etc 1580 * as macros, and we don't want them expanded here. 1581 */ 1582 this->glBegin(GL_TRIANGLE_STRIP); 1583 (this->glTexCoord2f)( 0.0, 0.0 ); 1584 (this->glVertex2i)( update.x, update.y ); 1585 (this->glTexCoord2f)( (float)(update.w / 256.0), 0.0 ); 1586 (this->glVertex2i)( update.x + update.w, update.y ); 1587 (this->glTexCoord2f)( 0.0, (float)(update.h / 256.0) ); 1588 (this->glVertex2i)( update.x, update.y + update.h ); 1589 (this->glTexCoord2f)( (float)(update.w / 256.0), (float)(update.h / 256.0) ); 1590 (this->glVertex2i)( update.x + update.w , update.y + update.h ); 1591 this->glEnd(); 1592 1593 tmp.x += 256; 1594 tmp.w -= 256; 1595 } 1596 tmp.y += 256; 1597 tmp.h -= 256; 1598 } 1599 } 1600 #endif 1601 } 1602 1603 /* Lock == save current state */ 1604 void SDL_GL_Lock() 1605 { 1606 #if SDL_VIDEO_OPENGL 1607 lock_count--; 1608 if (lock_count==-1) 1609 { 1610 SDL_VideoDevice *this = current_video; 1611 1612 this->glPushAttrib( GL_ALL_ATTRIB_BITS ); /* TODO: narrow range of what is saved */ 1613 #ifdef GL_CLIENT_PIXEL_STORE_BIT 1614 this->glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT ); 1615 #endif 1616 1617 this->glEnable(GL_TEXTURE_2D); 1618 this->glEnable(GL_BLEND); 1619 this->glDisable(GL_FOG); 1620 this->glDisable(GL_ALPHA_TEST); 1621 this->glDisable(GL_DEPTH_TEST); 1622 this->glDisable(GL_SCISSOR_TEST); 1623 this->glDisable(GL_STENCIL_TEST); 1624 this->glDisable(GL_CULL_FACE); 1625 1626 this->glBindTexture( GL_TEXTURE_2D, this->texture ); 1627 this->glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); 1628 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); 1629 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); 1630 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ); 1631 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ); 1632 1633 this->glPixelStorei( GL_UNPACK_ROW_LENGTH, this->screen->pitch / this->screen->format->BytesPerPixel ); 1634 this->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 1635 (this->glColor4f)(1.0, 1.0, 1.0, 1.0); /* Solaris workaround */ 1636 1637 this->glViewport(0, 0, this->screen->w, this->screen->h); 1638 this->glMatrixMode(GL_PROJECTION); 1639 this->glPushMatrix(); 1640 this->glLoadIdentity(); 1641 1642 this->glOrtho(0.0, (GLdouble) this->screen->w, (GLdouble) this->screen->h, 0.0, 0.0, 1.0); 1643 1644 this->glMatrixMode(GL_MODELVIEW); 1645 this->glPushMatrix(); 1646 this->glLoadIdentity(); 1647 } 1648 #endif 1649 } 1650 1651 /* Unlock == restore saved state */ 1652 void SDL_GL_Unlock() 1653 { 1654 #if SDL_VIDEO_OPENGL 1655 lock_count++; 1656 if (lock_count==0) 1657 { 1658 SDL_VideoDevice *this = current_video; 1659 1660 this->glPopMatrix(); 1661 this->glMatrixMode(GL_PROJECTION); 1662 this->glPopMatrix(); 1663 1664 this->glPopClientAttrib(); 1665 this->glPopAttrib(); 1666 } 1667 #endif 1668 } 1669 1670 /* 1671 * Sets/Gets the title and icon text of the display window, if any. 1672 */ 1673 void SDL_WM_SetCaption (const char *title, const char *icon) 1674 { 1675 SDL_VideoDevice *video = current_video; 1676 SDL_VideoDevice *this = current_video; 1677 1678 if ( video ) { 1679 if ( title ) { 1680 if ( video->wm_title ) { 1681 SDL_free(video->wm_title); 1682 } 1683 video->wm_title = SDL_strdup(title); 1684 } 1685 if ( icon ) { 1686 if ( video->wm_icon ) { 1687 SDL_free(video->wm_icon); 1688 } 1689 video->wm_icon = SDL_strdup(icon); 1690 } 1691 if ( (title || icon) && (video->SetCaption != NULL) ) { 1692 video->SetCaption(this, video->wm_title,video->wm_icon); 1693 } 1694 } 1695 } 1696 void SDL_WM_GetCaption (char **title, char **icon) 1697 { 1698 SDL_VideoDevice *video = current_video; 1699 1700 if ( video ) { 1701 if ( title ) { 1702 *title = video->wm_title; 1703 } 1704 if ( icon ) { 1705 *icon = video->wm_icon; 1706 } 1707 } 1708 } 1709 1710 /* Utility function used by SDL_WM_SetIcon(); 1711 * flags & 1 for color key, flags & 2 for alpha channel. */ 1712 static void CreateMaskFromColorKeyOrAlpha(SDL_Surface *icon, Uint8 *mask, int flags) 1713 { 1714 int x, y; 1715 Uint32 colorkey; 1716 #define SET_MASKBIT(icon, x, y, mask) \ 1717 mask[(y*((icon->w+7)/8))+(x/8)] &= ~(0x01<<(7-(x%8))) 1718 1719 colorkey = icon->format->colorkey; 1720 switch (icon->format->BytesPerPixel) { 1721 case 1: { Uint8 *pixels; 1722 for ( y=0; y<icon->h; ++y ) { 1723 pixels = (Uint8 *)icon->pixels + y*icon->pitch; 1724 for ( x=0; x<icon->w; ++x ) { 1725 if ( *pixels++ == colorkey ) { 1726 SET_MASKBIT(icon, x, y, mask); 1727 } 1728 } 1729 } 1730 } 1731 break; 1732 1733 case 2: { Uint16 *pixels; 1734 for ( y=0; y<icon->h; ++y ) { 1735 pixels = (Uint16 *)icon->pixels + 1736 y*icon->pitch/2; 1737 for ( x=0; x<icon->w; ++x ) { 1738 if ( (flags & 1) && *pixels == colorkey ) { 1739 SET_MASKBIT(icon, x, y, mask); 1740 } else if((flags & 2) && (*pixels & icon->format->Amask) == 0) { 1741 SET_MASKBIT(icon, x, y, mask); 1742 } 1743 pixels++; 1744 } 1745 } 1746 } 1747 break; 1748 1749 case 4: { Uint32 *pixels; 1750 for ( y=0; y<icon->h; ++y ) { 1751 pixels = (Uint32 *)icon->pixels + 1752 y*icon->pitch/4; 1753 for ( x=0; x<icon->w; ++x ) { 1754 if ( (flags & 1) && *pixels == colorkey ) { 1755 SET_MASKBIT(icon, x, y, mask); 1756 } else if((flags & 2) && (*pixels & icon->format->Amask) == 0) { 1757 SET_MASKBIT(icon, x, y, mask); 1758 } 1759 pixels++; 1760 } 1761 } 1762 } 1763 break; 1764 } 1765 } 1766 1767 /* 1768 * Sets the window manager icon for the display window. 1769 */ 1770 void SDL_WM_SetIcon (SDL_Surface *icon, Uint8 *mask) 1771 { 1772 SDL_VideoDevice *video = current_video; 1773 SDL_VideoDevice *this = current_video; 1774 1775 if ( icon && video->SetIcon ) { 1776 /* Generate a mask if necessary, and create the icon! */ 1777 if ( mask == NULL ) { 1778 int mask_len = icon->h*(icon->w+7)/8; 1779 int flags = 0; 1780 mask = (Uint8 *)SDL_malloc(mask_len); 1781 if ( mask == NULL ) { 1782 return; 1783 } 1784 SDL_memset(mask, ~0, mask_len); 1785 if ( icon->flags & SDL_SRCCOLORKEY ) flags |= 1; 1786 if ( icon->flags & SDL_SRCALPHA ) flags |= 2; 1787 if( flags ) { 1788 CreateMaskFromColorKeyOrAlpha(icon, mask, flags); 1789 } 1790 video->SetIcon(video, icon, mask); 1791 SDL_free(mask); 1792 } else { 1793 video->SetIcon(this, icon, mask); 1794 } 1795 } 1796 } 1797 1798 /* 1799 * Grab or ungrab the keyboard and mouse input. 1800 * This function returns the final grab mode after calling the 1801 * driver dependent function. 1802 */ 1803 static SDL_GrabMode SDL_WM_GrabInputRaw(SDL_GrabMode mode) 1804 { 1805 SDL_VideoDevice *video = current_video; 1806 SDL_VideoDevice *this = current_video; 1807 1808 /* Only do something if we have support for grabs */ 1809 if ( video->GrabInput == NULL ) { 1810 return(video->input_grab); 1811 } 1812 1813 /* If the final grab mode if off, only then do we actually grab */ 1814 #ifdef DEBUG_GRAB 1815 printf("SDL_WM_GrabInputRaw(%d) ... ", mode); 1816 #endif 1817 if ( mode == SDL_GRAB_OFF ) { 1818 if ( video->input_grab != SDL_GRAB_OFF ) { 1819 mode = video->GrabInput(this, mode); 1820 } 1821 } else { 1822 if ( video->input_grab == SDL_GRAB_OFF ) { 1823 mode = video->GrabInput(this, mode); 1824 } 1825 } 1826 if ( mode != video->input_grab ) { 1827 video->input_grab = mode; 1828 if ( video->CheckMouseMode ) { 1829 video->CheckMouseMode(this); 1830 } 1831 } 1832 #ifdef DEBUG_GRAB 1833 printf("Final mode %d\n", video->input_grab); 1834 #endif 1835 1836 /* Return the final grab state */ 1837 if ( mode >= SDL_GRAB_FULLSCREEN ) { 1838 mode -= SDL_GRAB_FULLSCREEN; 1839 } 1840 return(mode); 1841 } 1842 SDL_GrabMode SDL_WM_GrabInput(SDL_GrabMode mode) 1843 { 1844 SDL_VideoDevice *video = current_video; 1845 1846 /* If the video isn't initialized yet, we can't do anything */ 1847 if ( ! video ) { 1848 return SDL_GRAB_OFF; 1849 } 1850 1851 /* Return the current mode on query */ 1852 if ( mode == SDL_GRAB_QUERY ) { 1853 mode = video->input_grab; 1854 if ( mode >= SDL_GRAB_FULLSCREEN ) { 1855 mode -= SDL_GRAB_FULLSCREEN; 1856 } 1857 return(mode); 1858 } 1859 1860 #ifdef DEBUG_GRAB 1861 printf("SDL_WM_GrabInput(%d) ... ", mode); 1862 #endif 1863 /* If the video surface is fullscreen, we always grab */ 1864 if ( mode >= SDL_GRAB_FULLSCREEN ) { 1865 mode -= SDL_GRAB_FULLSCREEN; 1866 } 1867 if ( SDL_VideoSurface && (SDL_VideoSurface->flags & SDL_FULLSCREEN) ) { 1868 mode += SDL_GRAB_FULLSCREEN; 1869 } 1870 return(SDL_WM_GrabInputRaw(mode)); 1871 } 1872 static SDL_GrabMode SDL_WM_GrabInputOff(void) 1873 { 1874 SDL_GrabMode mode; 1875 1876 /* First query the current grab state */ 1877 mode = SDL_WM_GrabInput(SDL_GRAB_QUERY); 1878 1879 /* Now explicitly turn off input grab */ 1880 SDL_WM_GrabInputRaw(SDL_GRAB_OFF); 1881 1882 /* Return the old state */ 1883 return(mode); 1884 } 1885 1886 /* 1887 * Iconify the window in window managed environments. 1888 * A successful iconification will result in an SDL_APPACTIVE loss event. 1889 */ 1890 int SDL_WM_IconifyWindow(void) 1891 { 1892 SDL_VideoDevice *video = current_video; 1893 SDL_VideoDevice *this = current_video; 1894 int retval; 1895 1896 retval = 0; 1897 if ( video->IconifyWindow ) { 1898 retval = video->IconifyWindow(this); 1899 } 1900 return(retval); 1901 } 1902 1903 /* 1904 * Toggle fullscreen mode 1905 */ 1906 int SDL_WM_ToggleFullScreen(SDL_Surface *surface) 1907 { 1908 SDL_VideoDevice *video = current_video; 1909 SDL_VideoDevice *this = current_video; 1910 int toggled; 1911 1912 toggled = 0; 1913 if ( SDL_PublicSurface && (surface == SDL_PublicSurface) && 1914 video->ToggleFullScreen ) { 1915 if ( surface->flags & SDL_FULLSCREEN ) { 1916 toggled = video->ToggleFullScreen(this, 0); 1917 if ( toggled ) { 1918 SDL_VideoSurface->flags &= ~SDL_FULLSCREEN; 1919 SDL_PublicSurface->flags &= ~SDL_FULLSCREEN; 1920 } 1921 } else { 1922 toggled = video->ToggleFullScreen(this, 1); 1923 if ( toggled ) { 1924 SDL_VideoSurface->flags |= SDL_FULLSCREEN; 1925 SDL_PublicSurface->flags |= SDL_FULLSCREEN; 1926 } 1927 } 1928 /* Double-check the grab state inside SDL_WM_GrabInput() */ 1929 if ( toggled ) { 1930 SDL_WM_GrabInput(video->input_grab); 1931 } 1932 } 1933 return(toggled); 1934 } 1935 1936 /* 1937 * Set window position 1938 */ 1939 void SDL_WM_SetPos(int x, int y) 1940 { 1941 SDL_VideoDevice* video = current_video; 1942 1943 if (video && video->SetWindowPos) 1944 video->SetWindowPos(video, x, y); 1945 } 1946 1947 /* 1948 * Get window position 1949 */ 1950 void SDL_WM_GetPos(int *px, int *py) 1951 { 1952 SDL_VideoDevice* video = current_video; 1953 1954 if (video && video->GetWindowPos) 1955 video->GetWindowPos(video, px, py); 1956 else { 1957 *px = 100; 1958 *py = 100; 1959 } 1960 } 1961 1962 int SDL_WM_IsFullyVisible( int recenter ) 1963 { 1964 int result = 1; 1965 1966 SDL_VideoDevice* video = current_video; 1967 1968 if (video && video->IsWindowVisible) { 1969 result = video->IsWindowVisible(video, recenter); 1970 } 1971 return result; 1972 } 1973 1974 int SDL_WM_GetMonitorDPI( int *xDpi, int *yDpi ) 1975 { 1976 int result = -1; 1977 SDL_VideoDevice* video = current_video; 1978 1979 if (video && video->GetMonitorDPI) { 1980 result = video->GetMonitorDPI(video, xDpi, yDpi); 1981 } 1982 return result; 1983 } 1984 1985 int SDL_WM_GetMonitorRect( SDL_Rect *rect ) 1986 { 1987 int result = -1; 1988 SDL_VideoDevice* video = current_video; 1989 1990 if (video && video->GetMonitorRect) { 1991 result = video->GetMonitorRect(video, rect); 1992 } 1993 return result; 1994 } 1995 1996 /* 1997 * Get some platform dependent window manager information 1998 */ 1999 int SDL_GetWMInfo (SDL_SysWMinfo *info) 2000 { 2001 SDL_VideoDevice *video = current_video; 2002 SDL_VideoDevice *this = current_video; 2003 2004 if ( video && video->GetWMInfo ) { 2005 return(video->GetWMInfo(this, info)); 2006 } else { 2007 return(0); 2008 } 2009 } 2010
