| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 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@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* DGA 2.0 based SDL video driver implementation. |
| 25 | */ |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | |
| 29 | #include <X11/Xlib.h> |
| 30 | #include "../Xext/extensions/xf86dga.h" |
| 31 | |
| 32 | #include "SDL_video.h" |
| 33 | #include "SDL_mouse.h" |
| 34 | #include "../SDL_sysvideo.h" |
| 35 | #include "../SDL_pixels_c.h" |
| 36 | #include "../../events/SDL_events_c.h" |
| 37 | #include "SDL_dgavideo.h" |
| 38 | #include "SDL_dgamouse_c.h" |
| 39 | #include "SDL_dgaevents_c.h" |
| 40 | |
| 41 | /* get function pointers... */ |
| 42 | #include "../x11/SDL_x11dyn.h" |
| 43 | |
| 44 | /*#define DGA_DEBUG*/ |
| 45 | |
| 46 | /* Initialization/Query functions */ |
| 47 | static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
| 48 | static SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
| 49 | static SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| 50 | static int DGA_SetColors(_THIS, int firstcolor, int ncolors, |
| 51 | SDL_Color *colors); |
| 52 | static int DGA_SetGammaRamp(_THIS, Uint16 *ramp); |
| 53 | static void DGA_VideoQuit(_THIS); |
| 54 | |
| 55 | /* Hardware surface functions */ |
| 56 | static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size); |
| 57 | static void DGA_FreeHWSurfaces(_THIS); |
| 58 | static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface); |
| 59 | static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color); |
| 60 | static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst); |
| 61 | static int DGA_LockHWSurface(_THIS, SDL_Surface *surface); |
| 62 | static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
| 63 | static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface); |
| 64 | static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface); |
| 65 | |
| 66 | /* DGA driver bootstrap functions */ |
| 67 | |
| 68 | static int DGA_Available(void) |
| 69 | { |
| 70 | const char *display = NULL; |
| 71 | Display *dpy = NULL; |
| 72 | int available = 0; |
| 73 | |
| 74 | /* The driver is available is available if the display is local |
| 75 | and the DGA 2.0+ extension is available, and we can map mem. |
| 76 | */ |
| 77 | if ( SDL_X11_LoadSymbols() ) { |
| 78 | if ( (SDL_strncmp(XDisplayName(display), ":", 1) == 0) || |
| 79 | (SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) { |
| 80 | dpy = XOpenDisplay(display); |
| 81 | if ( dpy ) { |
| 82 | int events, errors, major, minor; |
| 83 | |
| 84 | if ( SDL_NAME(XDGAQueryExtension)(dpy, &events, &errors) && |
| 85 | SDL_NAME(XDGAQueryVersion)(dpy, &major, &minor) ) { |
| 86 | int screen; |
| 87 | |
| 88 | screen = DefaultScreen(dpy); |
| 89 | if ( (major >= 2) && |
| 90 | SDL_NAME(XDGAOpenFramebuffer)(dpy, screen) ) { |
| 91 | available = 1; |
| 92 | SDL_NAME(XDGACloseFramebuffer)(dpy, screen); |
| 93 | } |
| 94 | } |
| 95 | XCloseDisplay(dpy); |
| 96 | } |
| 97 | } |
| 98 | SDL_X11_UnloadSymbols(); |
| 99 | } |
| 100 | return(available); |
| 101 | } |
| 102 | |
| 103 | static void DGA_DeleteDevice(SDL_VideoDevice *device) |
| 104 | { |
| 105 | if (device != NULL) { |
| 106 | SDL_free(device->hidden); |
| 107 | SDL_free(device); |
| 108 | SDL_X11_UnloadSymbols(); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | static SDL_VideoDevice *DGA_CreateDevice(int devindex) |
| 113 | { |
| 114 | SDL_VideoDevice *device = NULL; |
| 115 | |
| 116 | /* Initialize all variables that we clean on shutdown */ |
| 117 | if (SDL_X11_LoadSymbols()) { |
| 118 | device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 119 | if ( device ) { |
| 120 | SDL_memset(device, 0, (sizeof *device)); |
| 121 | device->hidden = (struct SDL_PrivateVideoData *) |
| 122 | SDL_malloc((sizeof *device->hidden)); |
| 123 | } |
| 124 | if ( (device == NULL) || (device->hidden == NULL) ) { |
| 125 | SDL_OutOfMemory(); |
| 126 | if ( device ) { |
| 127 | SDL_free(device); |
| 128 | } |
| 129 | SDL_X11_UnloadSymbols(); |
| 130 | return(0); |
| 131 | } |
| 132 | SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 133 | |
| 134 | /* Set the function pointers */ |
| 135 | device->VideoInit = DGA_VideoInit; |
| 136 | device->ListModes = DGA_ListModes; |
| 137 | device->SetVideoMode = DGA_SetVideoMode; |
| 138 | device->SetColors = DGA_SetColors; |
| 139 | device->UpdateRects = NULL; |
| 140 | device->VideoQuit = DGA_VideoQuit; |
| 141 | device->AllocHWSurface = DGA_AllocHWSurface; |
| 142 | device->CheckHWBlit = DGA_CheckHWBlit; |
| 143 | device->FillHWRect = DGA_FillHWRect; |
| 144 | device->SetHWColorKey = NULL; |
| 145 | device->SetHWAlpha = NULL; |
| 146 | device->LockHWSurface = DGA_LockHWSurface; |
| 147 | device->UnlockHWSurface = DGA_UnlockHWSurface; |
| 148 | device->FlipHWSurface = DGA_FlipHWSurface; |
| 149 | device->FreeHWSurface = DGA_FreeHWSurface; |
| 150 | device->SetGammaRamp = DGA_SetGammaRamp; |
| 151 | device->GetGammaRamp = NULL; |
| 152 | device->SetCaption = NULL; |
| 153 | device->SetIcon = NULL; |
| 154 | device->IconifyWindow = NULL; |
| 155 | device->GrabInput = NULL; |
| 156 | device->GetWMInfo = NULL; |
| 157 | device->InitOSKeymap = DGA_InitOSKeymap; |
| 158 | device->PumpEvents = DGA_PumpEvents; |
| 159 | |
| 160 | device->free = DGA_DeleteDevice; |
| 161 | } |
| 162 | |
| 163 | return device; |
| 164 | } |
| 165 | |
| 166 | VideoBootStrap DGA_bootstrap = { |
| 167 | "dga", "XFree86 DGA 2.0", |
| 168 | DGA_Available, DGA_CreateDevice |
| 169 | }; |
| 170 | |
| 171 | static int DGA_AddMode(_THIS, int bpp, int w, int h) |
| 172 | { |
| 173 | SDL_Rect *mode; |
| 174 | int index; |
| 175 | int next_mode; |
| 176 | |
| 177 | /* Check to see if we already have this mode */ |
| 178 | if ( bpp < 8 ) { /* Not supported */ |
| 179 | return(0); |
| 180 | } |
| 181 | index = ((bpp+7)/8)-1; |
| 182 | if ( SDL_nummodes[index] > 0 ) { |
| 183 | mode = SDL_modelist[index][SDL_nummodes[index]-1]; |
| 184 | if ( (mode->w == w) && (mode->h == h) ) { |
| 185 | return(0); |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | /* Set up the new video mode rectangle */ |
| 190 | mode = (SDL_Rect *)SDL_malloc(sizeof *mode); |
| 191 | if ( mode == NULL ) { |
| 192 | SDL_OutOfMemory(); |
| 193 | return(-1); |
| 194 | } |
| 195 | mode->x = 0; |
| 196 | mode->y = 0; |
| 197 | mode->w = w; |
| 198 | mode->h = h; |
| 199 | |
| 200 | /* Allocate the new list of modes, and fill in the new mode */ |
| 201 | next_mode = SDL_nummodes[index]; |
| 202 | SDL_modelist[index] = (SDL_Rect **) |
| 203 | SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *)); |
| 204 | if ( SDL_modelist[index] == NULL ) { |
| 205 | SDL_OutOfMemory(); |
| 206 | SDL_nummodes[index] = 0; |
| 207 | SDL_free(mode); |
| 208 | return(-1); |
| 209 | } |
| 210 | SDL_modelist[index][next_mode] = mode; |
| 211 | SDL_modelist[index][next_mode+1] = NULL; |
| 212 | SDL_nummodes[index]++; |
| 213 | |
| 214 | return(0); |
| 215 | } |
| 216 | |
| 217 | /* This whole function is a hack. :) */ |
| 218 | static Uint32 get_video_size(_THIS) |
| 219 | { |
| 220 | /* This is a non-exported function from libXxf86dga.a */ |
| 221 | extern unsigned char *SDL_NAME(XDGAGetMappedMemory)(int screen); |
| 222 | FILE *proc; |
| 223 | unsigned long mem; |
| 224 | unsigned start, stop; |
| 225 | char line[BUFSIZ]; |
| 226 | Uint32 size; |
| 227 | |
| 228 | mem = (unsigned long)SDL_NAME(XDGAGetMappedMemory)(DGA_Screen); |
| 229 | size = 0; |
| 230 | proc = fopen("/proc/self/maps", "r"); |
| 231 | if ( proc ) { |
| 232 | while ( fgets(line, sizeof(line)-1, proc) ) { |
| 233 | SDL_sscanf(line, "%x-%x", &start, &stop); |
| 234 | if ( start == mem ) { |
| 235 | size = (Uint32)((stop-start)/1024); |
| 236 | break; |
| 237 | } |
| 238 | } |
| 239 | fclose(proc); |
| 240 | } |
| 241 | return(size); |
| 242 | } |
| 243 | |
| 244 | #ifdef DGA_DEBUG |
| 245 | static void PrintMode(SDL_NAME(XDGAMode) *mode) |
| 246 | { |
| 247 | printf("Mode: %s (%dx%d) at %d bpp (%f refresh, %d pitch) num: %d\n", |
| 248 | mode->name, |
| 249 | mode->viewportWidth, mode->viewportHeight, |
| 250 | mode->depth == 24 ? mode->bitsPerPixel : mode->depth, |
| 251 | mode->verticalRefresh, mode->bytesPerScanline, mode->num); |
| 252 | printf("\tRGB: 0x%8.8x 0x%8.8x 0x%8.8x (%d - %s)\n", |
| 253 | mode->redMask, mode->greenMask, mode->blueMask, |
| 254 | mode->visualClass, |
| 255 | mode->visualClass == TrueColor ? "truecolor" : |
| 256 | mode->visualClass == DirectColor ? "directcolor" : |
| 257 | mode->visualClass == PseudoColor ? "pseudocolor" : "unknown"); |
| 258 | printf("\tFlags: "); |
| 259 | if ( mode->flags & XDGAConcurrentAccess ) |
| 260 | printf(" XDGAConcurrentAccess"); |
| 261 | if ( mode->flags & XDGASolidFillRect ) |
| 262 | printf(" XDGASolidFillRect"); |
| 263 | if ( mode->flags & XDGABlitRect ) |
| 264 | printf(" XDGABlitRect"); |
| 265 | if ( mode->flags & XDGABlitTransRect ) |
| 266 | printf(" XDGABlitTransRect"); |
| 267 | if ( mode->flags & XDGAPixmap ) |
| 268 | printf(" XDGAPixmap"); |
| 269 | if ( mode->flags & XDGAInterlaced ) |
| 270 | printf(" XDGAInterlaced"); |
| 271 | if ( mode->flags & XDGADoublescan ) |
| 272 | printf(" XDGADoublescan"); |
| 273 | if ( mode->viewportFlags & XDGAFlipRetrace ) |
| 274 | printf(" XDGAFlipRetrace"); |
| 275 | if ( mode->viewportFlags & XDGAFlipImmediate ) |
| 276 | printf(" XDGAFlipImmediate"); |
| 277 | printf("\n"); |
| 278 | } |
| 279 | #endif /* DGA_DEBUG */ |
| 280 | |
| 281 | static int cmpmodes(const void *va, const void *vb) |
| 282 | { |
| 283 | const SDL_NAME(XDGAMode) *a = (const SDL_NAME(XDGAMode) *)va; |
| 284 | const SDL_NAME(XDGAMode) *b = (const SDL_NAME(XDGAMode) *)vb; |
| 285 | |
| 286 | if ( (a->viewportWidth == b->viewportWidth) && |
| 287 | (b->viewportHeight == a->viewportHeight) ) { |
| 288 | /* Prefer 32 bpp over 24 bpp, 16 bpp over 15 bpp */ |
| 289 | int a_bpp = a->depth == 24 ? a->bitsPerPixel : a->depth; |
| 290 | int b_bpp = b->depth == 24 ? b->bitsPerPixel : b->depth; |
| 291 | if ( a_bpp != b_bpp ) { |
| 292 | return b_bpp - a_bpp; |
| 293 | } |
| 294 | /* Prefer DirectColor visuals, for gamma support */ |
| 295 | if ( a->visualClass == DirectColor && b->visualClass != DirectColor ) |
| 296 | return -1; |
| 297 | if ( b->visualClass == DirectColor && a->visualClass != DirectColor ) |
| 298 | return 1; |
| 299 | /* Maintain server refresh rate sorting */ |
| 300 | return a->num - b->num; |
| 301 | } else if ( a->viewportWidth == b->viewportWidth ) { |
| 302 | return b->viewportHeight - a->viewportHeight; |
| 303 | } else { |
| 304 | return b->viewportWidth - a->viewportWidth; |
| 305 | } |
| 306 | } |
| 307 | static void UpdateHWInfo(_THIS, SDL_NAME(XDGAMode) *mode) |
| 308 | { |
| 309 | this->info.wm_available = 0; |
| 310 | this->info.hw_available = 1; |
| 311 | if ( mode->flags & XDGABlitRect ) { |
| 312 | this->info.blit_hw = 1; |
| 313 | } else { |
| 314 | this->info.blit_hw = 0; |
| 315 | } |
| 316 | if ( mode->flags & XDGABlitTransRect ) { |
| 317 | this->info.blit_hw_CC = 1; |
| 318 | } else { |
| 319 | this->info.blit_hw_CC = 0; |
| 320 | } |
| 321 | if ( mode->flags & XDGASolidFillRect ) { |
| 322 | this->info.blit_fill = 1; |
| 323 | } else { |
| 324 | this->info.blit_fill = 0; |
| 325 | } |
| 326 | this->info.video_mem = get_video_size(this); |
| 327 | } |
| 328 | |
| 329 | static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
| 330 | { |
| 331 | const char *env; |
| 332 | const char *display; |
| 333 | int event_base, error_base; |
| 334 | int major_version, minor_version; |
| 335 | Visual *visual; |
| 336 | SDL_NAME(XDGAMode) *modes; |
| 337 | int i, num_modes; |
| 338 | |
| 339 | /* Open the X11 display */ |
| 340 | display = NULL; /* Get it from DISPLAY environment variable */ |
| 341 | |
| 342 | DGA_Display = XOpenDisplay(display); |
| 343 | if ( DGA_Display == NULL ) { |
| 344 | SDL_SetError("Couldn't open X11 display"); |
| 345 | return(-1); |
| 346 | } |
| 347 | |
| 348 | /* Check for the DGA extension */ |
| 349 | if ( ! SDL_NAME(XDGAQueryExtension)(DGA_Display, &event_base, &error_base) || |
| 350 | ! SDL_NAME(XDGAQueryVersion)(DGA_Display, &major_version, &minor_version) ) { |
| 351 | SDL_SetError("DGA extension not available"); |
| 352 | XCloseDisplay(DGA_Display); |
| 353 | return(-1); |
| 354 | } |
| 355 | if ( major_version < 2 ) { |
| 356 | SDL_SetError("DGA driver requires DGA 2.0 or newer"); |
| 357 | XCloseDisplay(DGA_Display); |
| 358 | return(-1); |
| 359 | } |
| 360 | DGA_event_base = event_base; |
| 361 | |
| 362 | /* Determine the current screen size */ |
| 363 | this->info.current_w = DisplayWidth(DGA_Display, DGA_Screen); |
| 364 | this->info.current_h = DisplayHeight(DGA_Display, DGA_Screen); |
| 365 | |
| 366 | /* Determine the current screen depth */ |
| 367 | visual = DefaultVisual(DGA_Display, DGA_Screen); |
| 368 | { |
| 369 | XPixmapFormatValues *pix_format; |
| 370 | int i, num_formats; |
| 371 | |
| 372 | vformat->BitsPerPixel = DefaultDepth(DGA_Display, DGA_Screen); |
| 373 | pix_format = XListPixmapFormats(DGA_Display, &num_formats); |
| 374 | if ( pix_format == NULL ) { |
| 375 | SDL_SetError("Couldn't determine screen formats"); |
| 376 | XCloseDisplay(DGA_Display); |
| 377 | return(-1); |
| 378 | } |
| 379 | for ( i=0; i<num_formats; ++i ) { |
| 380 | if ( vformat->BitsPerPixel == pix_format[i].depth ) |
| 381 | break; |
| 382 | } |
| 383 | if ( i != num_formats ) |
| 384 | vformat->BitsPerPixel = pix_format[i].bits_per_pixel; |
| 385 | XFree((char *)pix_format); |
| 386 | } |
| 387 | if ( vformat->BitsPerPixel > 8 ) { |
| 388 | vformat->Rmask = visual->red_mask; |
| 389 | vformat->Gmask = visual->green_mask; |
| 390 | vformat->Bmask = visual->blue_mask; |
| 391 | } |
| 392 | |
| 393 | /* Open access to the framebuffer */ |
| 394 | if ( ! SDL_NAME(XDGAOpenFramebuffer)(DGA_Display, DGA_Screen) ) { |
| 395 | SDL_SetError("Unable to map the video memory"); |
| 396 | XCloseDisplay(DGA_Display); |
| 397 | return(-1); |
| 398 | } |
| 399 | |
| 400 | /* Allow environment override of screensaver disable. */ |
| 401 | env = SDL_getenv("SDL_VIDEO_ALLOW_SCREENSAVER"); |
| 402 | if ( env ) { |
| 403 | allow_screensaver = SDL_atoi(env); |
| 404 | } else { |
| 405 | #ifdef SDL_VIDEO_DISABLE_SCREENSAVER |
| 406 | allow_screensaver = 0; |
| 407 | #else |
| 408 | allow_screensaver = 1; |
| 409 | #endif |
| 410 | } |
| 411 | |
| 412 | /* Query for the list of available video modes */ |
| 413 | modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes); |
| 414 | SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes); |
| 415 | for ( i=0; i<num_modes; ++i ) { |
| 416 | if ( ((modes[i].visualClass == PseudoColor) || |
| 417 | (modes[i].visualClass == DirectColor) || |
| 418 | (modes[i].visualClass == TrueColor)) && |
| 419 | !(modes[i].flags & (XDGAInterlaced|XDGADoublescan)) ) { |
| 420 | #ifdef DGA_DEBUG |
| 421 | PrintMode(&modes[i]); |
| 422 | #endif |
| 423 | DGA_AddMode(this, modes[i].bitsPerPixel, |
| 424 | modes[i].viewportWidth, |
| 425 | modes[i].viewportHeight); |
| 426 | } |
| 427 | } |
| 428 | UpdateHWInfo(this, modes); |
| 429 | XFree(modes); |
| 430 | |
| 431 | /* Create the hardware surface lock mutex */ |
| 432 | hw_lock = SDL_CreateMutex(); |
| 433 | if ( hw_lock == NULL ) { |
| 434 | SDL_SetError("Unable to create lock mutex"); |
| 435 | DGA_VideoQuit(this); |
| 436 | return(-1); |
| 437 | } |
| 438 | |
| 439 | #ifdef LOCK_DGA_DISPLAY |
| 440 | /* Create the event lock so we're thread-safe.. :-/ */ |
| 441 | event_lock = SDL_CreateMutex(); |
| 442 | #endif /* LOCK_DGA_DISPLAY */ |
| 443 | |
| 444 | /* We're done! */ |
| 445 | return(0); |
| 446 | } |
| 447 | |
| 448 | SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
| 449 | { |
| 450 | return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
| 451 | } |
| 452 | |
| 453 | /* Various screen update functions available */ |
| 454 | static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
| 455 | |
| 456 | SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, |
| 457 | int width, int height, int bpp, Uint32 flags) |
| 458 | { |
| 459 | SDL_NAME(XDGAMode) *modes; |
| 460 | int i, num_modes; |
| 461 | SDL_NAME(XDGADevice) *mode; |
| 462 | int screen_len; |
| 463 | Uint8 *surfaces_mem; |
| 464 | int surfaces_len; |
| 465 | |
| 466 | /* Free any previous colormap */ |
| 467 | if ( DGA_colormap ) { |
| 468 | XFreeColormap(DGA_Display, DGA_colormap); |
| 469 | DGA_colormap = 0; |
| 470 | } |
| 471 | |
| 472 | /* Search for a matching video mode */ |
| 473 | modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes); |
| 474 | SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes); |
| 475 | for ( i=0; i<num_modes; ++i ) { |
| 476 | int depth; |
| 477 | |
| 478 | depth = modes[i].depth; |
| 479 | if ( depth == 24 ) { /* Distinguish between 24 and 32 bpp */ |
| 480 | depth = modes[i].bitsPerPixel; |
| 481 | } |
| 482 | if ( (depth == bpp) && |
| 483 | (modes[i].viewportWidth == width) && |
| 484 | (modes[i].viewportHeight == height) && |
| 485 | ((modes[i].visualClass == PseudoColor) || |
| 486 | (modes[i].visualClass == DirectColor) || |
| 487 | (modes[i].visualClass == TrueColor)) && |
| 488 | !(modes[i].flags & (XDGAInterlaced|XDGADoublescan)) ) { |
| 489 | break; |
| 490 | } |
| 491 | } |
| 492 | if ( i == num_modes ) { |
| 493 | SDL_SetError("No matching video mode found"); |
| 494 | return(NULL); |
| 495 | } |
| 496 | #ifdef DGA_DEBUG |
| 497 | PrintMode(&modes[i]); |
| 498 | #endif |
| 499 | |
| 500 | /* Set the video mode */ |
| 501 | mode = SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, modes[i].num); |
| 502 | XFree(modes); |
| 503 | if ( mode == NULL ) { |
| 504 | SDL_SetError("Unable to switch to requested mode"); |
| 505 | return(NULL); |
| 506 | } |
| 507 | DGA_visualClass = mode->mode.visualClass; |
| 508 | memory_base = (Uint8 *)mode->data; |
| 509 | memory_pitch = mode->mode.bytesPerScanline; |
| 510 | |
| 511 | /* Set up the new mode framebuffer */ |
| 512 | current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); |
| 513 | current->w = mode->mode.viewportWidth; |
| 514 | current->h = mode->mode.viewportHeight; |
| 515 | current->pitch = memory_pitch; |
| 516 | current->pixels = memory_base; |
| 517 | if ( ! SDL_ReallocFormat(current, mode->mode.bitsPerPixel, |
| 518 | mode->mode.redMask, |
| 519 | mode->mode.greenMask, |
| 520 | mode->mode.blueMask, 0) ) { |
| 521 | return(NULL); |
| 522 | } |
| 523 | screen_len = current->h*current->pitch; |
| 524 | |
| 525 | /* Create a colormap if necessary */ |
| 526 | if ( (DGA_visualClass == PseudoColor) || |
| 527 | (DGA_visualClass == DirectColor) ) { |
| 528 | DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen, |
| 529 | mode, AllocAll); |
| 530 | if ( DGA_visualClass == PseudoColor ) { |
| 531 | current->flags |= SDL_HWPALETTE; |
| 532 | } else { |
| 533 | /* Initialize the colormap to the identity mapping */ |
| 534 | SDL_GetGammaRamp(0, 0, 0); |
| 535 | this->screen = current; |
| 536 | DGA_SetGammaRamp(this, this->gamma); |
| 537 | this->screen = NULL; |
| 538 | } |
| 539 | } else { |
| 540 | DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen, |
| 541 | mode, AllocNone); |
| 542 | } |
| 543 | SDL_NAME(XDGAInstallColormap)(DGA_Display, DGA_Screen, DGA_colormap); |
| 544 | |
| 545 | /* Update the hardware capabilities */ |
| 546 | UpdateHWInfo(this, &mode->mode); |
| 547 | |
| 548 | /* Set up the information for hardware surfaces */ |
| 549 | surfaces_mem = (Uint8 *)current->pixels + screen_len; |
| 550 | surfaces_len = (mode->mode.imageHeight*current->pitch - screen_len); |
| 551 | |
| 552 | /* Update for double-buffering, if we can */ |
| 553 | SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, 0, 0, XDGAFlipRetrace); |
| 554 | if ( flags & SDL_DOUBLEBUF ) { |
| 555 | if ( mode->mode.imageHeight >= (current->h*2) ) { |
| 556 | current->flags |= SDL_DOUBLEBUF; |
| 557 | flip_page = 0; |
| 558 | flip_yoffset[0] = 0; |
| 559 | flip_yoffset[1] = current->h; |
| 560 | flip_address[0] = memory_base; |
| 561 | flip_address[1] = memory_base+screen_len; |
| 562 | surfaces_mem += screen_len; |
| 563 | surfaces_len -= screen_len; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | /* Allocate memory tracking for hardware surfaces */ |
| 568 | DGA_FreeHWSurfaces(this); |
| 569 | if ( surfaces_len < 0 ) { |
| 570 | surfaces_len = 0; |
| 571 | } |
| 572 | DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len); |
| 573 | |
| 574 | /* Expose the back buffer as surface memory */ |
| 575 | if ( current->flags & SDL_DOUBLEBUF ) { |
| 576 | this->screen = current; |
| 577 | DGA_FlipHWSurface(this, current); |
| 578 | this->screen = NULL; |
| 579 | } |
| 580 | |
| 581 | /* Set the update rectangle function */ |
| 582 | this->UpdateRects = DGA_DirectUpdate; |
| 583 | |
| 584 | /* Enable mouse and keyboard support */ |
| 585 | { long input_mask; |
| 586 | input_mask = (KeyPressMask | KeyReleaseMask); |
| 587 | input_mask |= (ButtonPressMask | ButtonReleaseMask); |
| 588 | input_mask |= PointerMotionMask; |
| 589 | SDL_NAME(XDGASelectInput)(DGA_Display, DGA_Screen, input_mask); |
| 590 | } |
| 591 | |
| 592 | /* We're done */ |
| 593 | return(current); |
| 594 | } |
| 595 | |
| 596 | #ifdef DGA_DEBUG |
| 597 | static void DGA_DumpHWSurfaces(_THIS) |
| 598 | { |
| 599 | vidmem_bucket *bucket; |
| 600 | |
| 601 | printf("Memory left: %d (%d total)\n", surfaces_memleft, surfaces_memtotal); |
| 602 | printf("\n"); |
| 603 | printf(" Base Size\n"); |
| 604 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| 605 | printf("Bucket: %p, %d (%s)\n", bucket->base, bucket->size, bucket->used ? "used" : "free"); |
| 606 | if ( bucket->prev ) { |
| 607 | if ( bucket->base != bucket->prev->base+bucket->prev->size ) { |
| 608 | printf("Warning, corrupt bucket list! (prev)\n"); |
| 609 | } |
| 610 | } else { |
| 611 | if ( bucket != &surfaces ) { |
| 612 | printf("Warning, corrupt bucket list! (!prev)\n"); |
| 613 | } |
| 614 | } |
| 615 | if ( bucket->next ) { |
| 616 | if ( bucket->next->base != bucket->base+bucket->size ) { |
| 617 | printf("Warning, corrupt bucket list! (next)\n"); |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | printf("\n"); |
| 622 | } |
| 623 | #endif |
| 624 | |
| 625 | static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size) |
| 626 | { |
| 627 | vidmem_bucket *bucket; |
| 628 | |
| 629 | surfaces_memtotal = size; |
| 630 | surfaces_memleft = size; |
| 631 | |
| 632 | if ( surfaces_memleft > 0 ) { |
| 633 | bucket = (vidmem_bucket *)SDL_malloc(sizeof(*bucket)); |
| 634 | if ( bucket == NULL ) { |
| 635 | SDL_OutOfMemory(); |
| 636 | return(-1); |
| 637 | } |
| 638 | bucket->prev = &surfaces; |
| 639 | bucket->used = 0; |
| 640 | bucket->dirty = 0; |
| 641 | bucket->base = base; |
| 642 | bucket->size = size; |
| 643 | bucket->next = NULL; |
| 644 | } else { |
| 645 | bucket = NULL; |
| 646 | } |
| 647 | |
| 648 | surfaces.prev = NULL; |
| 649 | surfaces.used = 1; |
| 650 | surfaces.dirty = 0; |
| 651 | surfaces.base = screen->pixels; |
| 652 | surfaces.size = (unsigned int)((long)base - (long)surfaces.base); |
| 653 | surfaces.next = bucket; |
| 654 | screen->hwdata = (struct private_hwdata *)&surfaces; |
| 655 | return(0); |
| 656 | } |
| 657 | static void DGA_FreeHWSurfaces(_THIS) |
| 658 | { |
| 659 | vidmem_bucket *bucket, *freeable; |
| 660 | |
| 661 | bucket = surfaces.next; |
| 662 | while ( bucket ) { |
| 663 | freeable = bucket; |
| 664 | bucket = bucket->next; |
| 665 | SDL_free(freeable); |
| 666 | } |
| 667 | surfaces.next = NULL; |
| 668 | } |
| 669 | |
| 670 | static __inline__ void DGA_AddBusySurface(SDL_Surface *surface) |
| 671 | { |
| 672 | ((vidmem_bucket *)surface->hwdata)->dirty = 1; |
| 673 | } |
| 674 | |
| 675 | static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface) |
| 676 | { |
| 677 | return ((vidmem_bucket *)surface->hwdata)->dirty; |
| 678 | } |
| 679 | |
| 680 | static __inline__ void DGA_WaitBusySurfaces(_THIS) |
| 681 | { |
| 682 | vidmem_bucket *bucket; |
| 683 | |
| 684 | /* Wait for graphic operations to complete */ |
| 685 | SDL_NAME(XDGASync)(DGA_Display, DGA_Screen); |
| 686 | |
| 687 | /* Clear all surface dirty bits */ |
| 688 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| 689 | bucket->dirty = 0; |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface) |
| 694 | { |
| 695 | vidmem_bucket *bucket; |
| 696 | int size; |
| 697 | int extra; |
| 698 | int retval = 0; |
| 699 | |
| 700 | /* Temporarily, we only allow surfaces the same width as display. |
| 701 | Some blitters require the pitch between two hardware surfaces |
| 702 | to be the same. Others have interesting alignment restrictions. |
| 703 | */ |
| 704 | if ( surface->pitch > SDL_VideoSurface->pitch ) { |
| 705 | SDL_SetError("Surface requested wider than screen"); |
| 706 | return(-1); |
| 707 | } |
| 708 | surface->pitch = SDL_VideoSurface->pitch; |
| 709 | size = surface->h * surface->pitch; |
| 710 | #ifdef DGA_DEBUG |
| 711 | fprintf(stderr, "Allocating bucket of %d bytes\n", size); |
| 712 | #endif |
| 713 | LOCK_DISPLAY(); |
| 714 | |
| 715 | /* Quick check for available mem */ |
| 716 | if ( size > surfaces_memleft ) { |
| 717 | SDL_SetError("Not enough video memory"); |
| 718 | retval = -1; |
| 719 | goto done; |
| 720 | } |
| 721 | |
| 722 | /* Search for an empty bucket big enough */ |
| 723 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| 724 | if ( ! bucket->used && (size <= bucket->size) ) { |
| 725 | break; |
| 726 | } |
| 727 | } |
| 728 | if ( bucket == NULL ) { |
| 729 | SDL_SetError("Video memory too fragmented"); |
| 730 | retval = -1; |
| 731 | goto done; |
| 732 | } |
| 733 | |
| 734 | /* Create a new bucket for left-over memory */ |
| 735 | extra = (bucket->size - size); |
| 736 | if ( extra ) { |
| 737 | vidmem_bucket *newbucket; |
| 738 | |
| 739 | #ifdef DGA_DEBUG |
| 740 | fprintf(stderr, "Adding new free bucket of %d bytes\n", extra); |
| 741 | #endif |
| 742 | newbucket = (vidmem_bucket *)SDL_malloc(sizeof(*newbucket)); |
| 743 | if ( newbucket == NULL ) { |
| 744 | SDL_OutOfMemory(); |
| 745 | retval = -1; |
| 746 | goto done; |
| 747 | } |
| 748 | newbucket->prev = bucket; |
| 749 | newbucket->used = 0; |
| 750 | newbucket->base = bucket->base+size; |
| 751 | newbucket->size = extra; |
| 752 | newbucket->next = bucket->next; |
| 753 | if ( bucket->next ) { |
| 754 | bucket->next->prev = newbucket; |
| 755 | } |
| 756 | bucket->next = newbucket; |
| 757 | } |
| 758 | |
| 759 | /* Set the current bucket values and return it! */ |
| 760 | bucket->used = 1; |
| 761 | bucket->size = size; |
| 762 | bucket->dirty = 0; |
| 763 | #ifdef DGA_DEBUG |
| 764 | fprintf(stderr, "Allocated %d bytes at %p\n", bucket->size, bucket->base); |
| 765 | #endif |
| 766 | surfaces_memleft -= size; |
| 767 | surface->flags |= SDL_HWSURFACE; |
| 768 | surface->pixels = bucket->base; |
| 769 | surface->hwdata = (struct private_hwdata *)bucket; |
| 770 | done: |
| 771 | UNLOCK_DISPLAY(); |
| 772 | return(retval); |
| 773 | } |
| 774 | static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface) |
| 775 | { |
| 776 | vidmem_bucket *bucket, *freeable; |
| 777 | |
| 778 | /* Wait for any pending operations involving this surface */ |
| 779 | if ( DGA_IsSurfaceBusy(surface) ) { |
| 780 | LOCK_DISPLAY(); |
| 781 | DGA_WaitBusySurfaces(this); |
| 782 | UNLOCK_DISPLAY(); |
| 783 | } |
| 784 | |
| 785 | /* Look for the bucket in the current list */ |
| 786 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| 787 | if ( bucket == (vidmem_bucket *)surface->hwdata ) { |
| 788 | break; |
| 789 | } |
| 790 | } |
| 791 | if ( bucket && bucket->used ) { |
| 792 | /* Add the memory back to the total */ |
| 793 | #ifdef DGA_DEBUG |
| 794 | printf("Freeing bucket of %d bytes\n", bucket->size); |
| 795 | #endif |
| 796 | surfaces_memleft += bucket->size; |
| 797 | |
| 798 | /* Can we merge the space with surrounding buckets? */ |
| 799 | bucket->used = 0; |
| 800 | if ( bucket->next && ! bucket->next->used ) { |
| 801 | #ifdef DGA_DEBUG |
| 802 | printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size); |
| 803 | #endif |
| 804 | freeable = bucket->next; |
| 805 | bucket->size += bucket->next->size; |
| 806 | bucket->next = bucket->next->next; |
| 807 | if ( bucket->next ) { |
| 808 | bucket->next->prev = bucket; |
| 809 | } |
| 810 | SDL_free(freeable); |
| 811 | } |
| 812 | if ( bucket->prev && ! bucket->prev->used ) { |
| 813 | #ifdef DGA_DEBUG |
| 814 | printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size); |
| 815 | #endif |
| 816 | freeable = bucket; |
| 817 | bucket->prev->size += bucket->size; |
| 818 | bucket->prev->next = bucket->next; |
| 819 | if ( bucket->next ) { |
| 820 | bucket->next->prev = bucket->prev; |
| 821 | } |
| 822 | SDL_free(freeable); |
| 823 | } |
| 824 | } |
| 825 | surface->pixels = NULL; |
| 826 | surface->hwdata = NULL; |
| 827 | } |
| 828 | |
| 829 | static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y) |
| 830 | { |
| 831 | *x = (long)((Uint8 *)dst->pixels - memory_base)%memory_pitch; |
| 832 | *y = (long)((Uint8 *)dst->pixels - memory_base)/memory_pitch; |
| 833 | } |
| 834 | |
| 835 | static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) |
| 836 | { |
| 837 | int x, y; |
| 838 | unsigned int w, h; |
| 839 | |
| 840 | /* Don't fill the visible part of the screen, wait until flipped */ |
| 841 | LOCK_DISPLAY(); |
| 842 | if ( was_flipped && (dst == this->screen) ) { |
| 843 | while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
| 844 | /* Keep waiting for the hardware ... */ ; |
| 845 | was_flipped = 0; |
| 846 | } |
| 847 | DGA_dst_to_xy(this, dst, &x, &y); |
| 848 | x += rect->x; |
| 849 | y += rect->y; |
| 850 | w = rect->w; |
| 851 | h = rect->h; |
| 852 | #if 0 |
| 853 | printf("Hardware accelerated rectangle fill: %dx%d at %d,%d\n", w, h, x, y); |
| 854 | #endif |
| 855 | SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color); |
| 856 | if ( !(this->screen->flags & SDL_DOUBLEBUF) ) { |
| 857 | XFlush(DGA_Display); |
| 858 | } |
| 859 | DGA_AddBusySurface(dst); |
| 860 | UNLOCK_DISPLAY(); |
| 861 | return(0); |
| 862 | } |
| 863 | |
| 864 | static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, |
| 865 | SDL_Surface *dst, SDL_Rect *dstrect) |
| 866 | { |
| 867 | SDL_VideoDevice *this; |
| 868 | int srcx, srcy; |
| 869 | int dstx, dsty; |
| 870 | unsigned int w, h; |
| 871 | |
| 872 | this = current_video; |
| 873 | /* Don't blit to the visible part of the screen, wait until flipped */ |
| 874 | LOCK_DISPLAY(); |
| 875 | if ( was_flipped && (dst == this->screen) ) { |
| 876 | while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
| 877 | /* Keep waiting for the hardware ... */ ; |
| 878 | was_flipped = 0; |
| 879 | } |
| 880 | DGA_dst_to_xy(this, src, &srcx, &srcy); |
| 881 | srcx += srcrect->x; |
| 882 | srcy += srcrect->y; |
| 883 | DGA_dst_to_xy(this, dst, &dstx, &dsty); |
| 884 | dstx += dstrect->x; |
| 885 | dsty += dstrect->y; |
| 886 | w = srcrect->w; |
| 887 | h = srcrect->h; |
| 888 | #if 0 |
| 889 | printf("Blitting %dx%d from %d,%d to %d,%d\n", w, h, srcx, srcy, dstx, dsty); |
| 890 | #endif |
| 891 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
| 892 | SDL_NAME(XDGACopyTransparentArea)(DGA_Display, DGA_Screen, |
| 893 | srcx, srcy, w, h, dstx, dsty, src->format->colorkey); |
| 894 | } else { |
| 895 | SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen, |
| 896 | srcx, srcy, w, h, dstx, dsty); |
| 897 | } |
| 898 | if ( !(this->screen->flags & SDL_DOUBLEBUF) ) { |
| 899 | XFlush(DGA_Display); |
| 900 | } |
| 901 | DGA_AddBusySurface(src); |
| 902 | DGA_AddBusySurface(dst); |
| 903 | UNLOCK_DISPLAY(); |
| 904 | return(0); |
| 905 | } |
| 906 | |
| 907 | static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) |
| 908 | { |
| 909 | int accelerated; |
| 910 | |
| 911 | /* Set initial acceleration on */ |
| 912 | src->flags |= SDL_HWACCEL; |
| 913 | |
| 914 | /* Set the surface attributes */ |
| 915 | if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
| 916 | if ( ! this->info.blit_hw_A ) { |
| 917 | src->flags &= ~SDL_HWACCEL; |
| 918 | } |
| 919 | } |
| 920 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
| 921 | if ( ! this->info.blit_hw_CC ) { |
| 922 | src->flags &= ~SDL_HWACCEL; |
| 923 | } |
| 924 | } |
| 925 | |
| 926 | /* Check to see if final surface blit is accelerated */ |
| 927 | accelerated = !!(src->flags & SDL_HWACCEL); |
| 928 | if ( accelerated ) { |
| 929 | src->map->hw_blit = HWAccelBlit; |
| 930 | } |
| 931 | return(accelerated); |
| 932 | } |
| 933 | |
| 934 | static __inline__ void DGA_WaitFlip(_THIS) |
| 935 | { |
| 936 | if ( was_flipped ) { |
| 937 | while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
| 938 | /* Keep waiting for the hardware ... */ ; |
| 939 | was_flipped = 0; |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | static int DGA_LockHWSurface(_THIS, SDL_Surface *surface) |
| 944 | { |
| 945 | if ( surface == this->screen ) { |
| 946 | SDL_mutexP(hw_lock); |
| 947 | LOCK_DISPLAY(); |
| 948 | if ( DGA_IsSurfaceBusy(surface) ) { |
| 949 | DGA_WaitBusySurfaces(this); |
| 950 | } |
| 951 | DGA_WaitFlip(this); |
| 952 | UNLOCK_DISPLAY(); |
| 953 | } else { |
| 954 | if ( DGA_IsSurfaceBusy(surface) ) { |
| 955 | LOCK_DISPLAY(); |
| 956 | DGA_WaitBusySurfaces(this); |
| 957 | UNLOCK_DISPLAY(); |
| 958 | } |
| 959 | } |
| 960 | return(0); |
| 961 | } |
| 962 | static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
| 963 | { |
| 964 | if ( surface == this->screen ) { |
| 965 | SDL_mutexV(hw_lock); |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface) |
| 970 | { |
| 971 | /* Wait for vertical retrace and then flip display */ |
| 972 | LOCK_DISPLAY(); |
| 973 | if ( DGA_IsSurfaceBusy(this->screen) ) { |
| 974 | DGA_WaitBusySurfaces(this); |
| 975 | } |
| 976 | DGA_WaitFlip(this); |
| 977 | SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, |
| 978 | 0, flip_yoffset[flip_page], XDGAFlipRetrace); |
| 979 | XFlush(DGA_Display); |
| 980 | UNLOCK_DISPLAY(); |
| 981 | was_flipped = 1; |
| 982 | flip_page = !flip_page; |
| 983 | |
| 984 | surface->pixels = flip_address[flip_page]; |
| 985 | return(0); |
| 986 | } |
| 987 | |
| 988 | static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
| 989 | { |
| 990 | /* The application is already updating the visible video memory */ |
| 991 | return; |
| 992 | } |
| 993 | |
| 994 | static int DGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
| 995 | { |
| 996 | int i; |
| 997 | XColor *xcmap; |
| 998 | |
| 999 | /* This happens on initialization */ |
| 1000 | if ( ! DGA_colormap ) { |
| 1001 | return(0); |
| 1002 | } |
| 1003 | xcmap = SDL_stack_alloc(XColor, ncolors); |
| 1004 | for ( i=0; i<ncolors; ++i ) { |
| 1005 | xcmap[i].pixel = firstcolor + i; |
| 1006 | xcmap[i].red = (colors[i].r<<8)|colors[i].r; |
| 1007 | xcmap[i].green = (colors[i].g<<8)|colors[i].g; |
| 1008 | xcmap[i].blue = (colors[i].b<<8)|colors[i].b; |
| 1009 | xcmap[i].flags = (DoRed|DoGreen|DoBlue); |
| 1010 | } |
| 1011 | LOCK_DISPLAY(); |
| 1012 | XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors); |
| 1013 | XSync(DGA_Display, False); |
| 1014 | UNLOCK_DISPLAY(); |
| 1015 | SDL_stack_free(xcmap); |
| 1016 | |
| 1017 | /* That was easy. :) */ |
| 1018 | return(1); |
| 1019 | } |
| 1020 | |
| 1021 | int DGA_SetGammaRamp(_THIS, Uint16 *ramp) |
| 1022 | { |
| 1023 | int i, ncolors; |
| 1024 | XColor xcmap[256]; |
| 1025 | |
| 1026 | /* See if actually setting the gamma is supported */ |
| 1027 | if ( DGA_visualClass != DirectColor ) { |
| 1028 | SDL_SetError("Gamma correction not supported on this visual"); |
| 1029 | return(-1); |
| 1030 | } |
| 1031 | |
| 1032 | /* Calculate the appropriate palette for the given gamma ramp */ |
| 1033 | if ( this->screen->format->BitsPerPixel <= 16 ) { |
| 1034 | ncolors = 64; /* Is this right? */ |
| 1035 | } else { |
| 1036 | ncolors = 256; |
| 1037 | } |
| 1038 | for ( i=0; i<ncolors; ++i ) { |
| 1039 | Uint8 c = (256 * i / ncolors); |
| 1040 | xcmap[i].pixel = SDL_MapRGB(this->screen->format, c, c, c); |
| 1041 | xcmap[i].red = ramp[0*256+c]; |
| 1042 | xcmap[i].green = ramp[1*256+c]; |
| 1043 | xcmap[i].blue = ramp[2*256+c]; |
| 1044 | xcmap[i].flags = (DoRed|DoGreen|DoBlue); |
| 1045 | } |
| 1046 | LOCK_DISPLAY(); |
| 1047 | XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors); |
| 1048 | XSync(DGA_Display, False); |
| 1049 | UNLOCK_DISPLAY(); |
| 1050 | return(0); |
| 1051 | } |
| 1052 | |
| 1053 | void DGA_VideoQuit(_THIS) |
| 1054 | { |
| 1055 | int i, j; |
| 1056 | |
| 1057 | if ( DGA_Display ) { |
| 1058 | /* Free colormap, if necessary */ |
| 1059 | if ( DGA_colormap ) { |
| 1060 | XFreeColormap(DGA_Display, DGA_colormap); |
| 1061 | DGA_colormap = 0; |
| 1062 | } |
| 1063 | |
| 1064 | /* Unmap memory and reset video mode */ |
| 1065 | SDL_NAME(XDGACloseFramebuffer)(DGA_Display, DGA_Screen); |
| 1066 | if ( this->screen ) { |
| 1067 | /* Tell SDL not to free the pixels */ |
| 1068 | DGA_FreeHWSurface(this, this->screen); |
| 1069 | } |
| 1070 | SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, 0); |
| 1071 | |
| 1072 | /* Clear the lock mutex */ |
| 1073 | if ( hw_lock != NULL ) { |
| 1074 | SDL_DestroyMutex(hw_lock); |
| 1075 | hw_lock = NULL; |
| 1076 | } |
| 1077 | #ifdef LOCK_DGA_DISPLAY |
| 1078 | if ( event_lock != NULL ) { |
| 1079 | SDL_DestroyMutex(event_lock); |
| 1080 | event_lock = NULL; |
| 1081 | } |
| 1082 | #endif /* LOCK_DGA_DISPLAY */ |
| 1083 | |
| 1084 | /* Clean up defined video modes */ |
| 1085 | for ( i=0; i<NUM_MODELISTS; ++i ) { |
| 1086 | if ( SDL_modelist[i] != NULL ) { |
| 1087 | for ( j=0; SDL_modelist[i][j]; ++j ) { |
| 1088 | SDL_free(SDL_modelist[i][j]); |
| 1089 | } |
| 1090 | SDL_free(SDL_modelist[i]); |
| 1091 | SDL_modelist[i] = NULL; |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | /* Clean up the memory bucket list */ |
| 1096 | DGA_FreeHWSurfaces(this); |
| 1097 | |
| 1098 | /* Close up the display */ |
| 1099 | XCloseDisplay(DGA_Display); |
| 1100 | } |
| 1101 | } |