Mercurial > sdl-ios-xcode
annotate src/video/svga/SDL_svgavideo.c @ 1549:066236f0cbf0
Implemented RISC OS and OS/2 desktop resolution code (thanks to Alan and Doodle)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 18 Mar 2006 22:42:09 +0000 |
| parents | 8d9bb0cf2c2a |
| children | 0ca607a5d173 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* SVGAlib based SDL video driver implementation. | |
| 25 */ | |
| 26 | |
| 27 #include <unistd.h> | |
| 28 #include <sys/stat.h> | |
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29 #include <sys/types.h> |
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30 #include <sys/ioctl.h> |
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31 #include <fcntl.h> |
| 0 | 32 |
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33 #if defined(__LINUX__) |
| 0 | 34 #include <linux/vt.h> |
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35 #elif defined(__FREEBSD__) |
| 0 | 36 #include <sys/consio.h> |
| 37 #else | |
| 38 #error You must choose your operating system here | |
| 39 #endif | |
| 40 #include <vga.h> | |
| 41 #include <vgamouse.h> | |
| 42 #include <vgakeyboard.h> | |
| 43 | |
| 44 #include "SDL_video.h" | |
| 45 #include "SDL_mouse.h" | |
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46 #include "../SDL_sysvideo.h" |
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47 #include "../SDL_pixels_c.h" |
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48 #include "../../events/SDL_events_c.h" |
| 0 | 49 #include "SDL_svgavideo.h" |
| 50 #include "SDL_svgaevents_c.h" | |
| 51 #include "SDL_svgamouse_c.h" | |
| 52 | |
| 53 | |
| 54 /* Initialization/Query functions */ | |
| 55 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat); | |
| 56 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); | |
| 57 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); | |
| 58 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors, | |
| 59 SDL_Color *colors); | |
| 60 static void SVGA_VideoQuit(_THIS); | |
| 61 | |
| 62 /* Hardware surface functions */ | |
| 63 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface); | |
| 64 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface); | |
| 65 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface); | |
| 66 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface); | |
| 67 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface); | |
| 68 | |
| 69 /* SVGAlib driver bootstrap functions */ | |
| 70 | |
| 71 static int SVGA_Available(void) | |
| 72 { | |
| 73 /* Check to see if we are root and stdin is a virtual console */ | |
| 74 int console; | |
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75 |
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76 /* SVGALib 1.9.x+ doesn't require root (via /dev/svga) */ |
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77 int svgalib2 = -1; |
| 0 | 78 |
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79 /* See if we are connected to a virtual terminal */ |
| 0 | 80 console = STDIN_FILENO; |
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81 #if 0 /* This is no longer needed, SVGAlib can switch consoles for us */ |
| 0 | 82 if ( console >= 0 ) { |
| 83 struct stat sb; | |
| 84 struct vt_mode dummy; | |
| 85 | |
| 86 if ( (fstat(console, &sb) < 0) || | |
| 87 (ioctl(console, VT_GETMODE, &dummy) < 0) ) { | |
| 88 console = -1; | |
| 89 } | |
| 90 } | |
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91 #endif /* 0 */ |
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92 |
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93 /* See if SVGAlib 2.0 is available */ |
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94 svgalib2 = open("/dev/svga", O_RDONLY); |
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95 if (svgalib2 != -1) { |
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96 close(svgalib2); |
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97 } |
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98 |
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99 return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
| 0 | 100 } |
| 101 | |
| 102 static void SVGA_DeleteDevice(SDL_VideoDevice *device) | |
| 103 { | |
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104 SDL_free(device->hidden); |
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105 SDL_free(device); |
| 0 | 106 } |
| 107 | |
| 108 static SDL_VideoDevice *SVGA_CreateDevice(int devindex) | |
| 109 { | |
| 110 SDL_VideoDevice *device; | |
| 111 | |
| 112 /* Initialize all variables that we clean on shutdown */ | |
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113 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 0 | 114 if ( device ) { |
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115 SDL_memset(device, 0, (sizeof *device)); |
| 0 | 116 device->hidden = (struct SDL_PrivateVideoData *) |
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117 SDL_malloc((sizeof *device->hidden)); |
| 0 | 118 } |
| 119 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 120 SDL_OutOfMemory(); | |
| 121 if ( device ) { | |
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122 SDL_free(device); |
| 0 | 123 } |
| 124 return(0); | |
| 125 } | |
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126 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 0 | 127 |
| 128 /* Set the function pointers */ | |
| 129 device->VideoInit = SVGA_VideoInit; | |
| 130 device->ListModes = SVGA_ListModes; | |
| 131 device->SetVideoMode = SVGA_SetVideoMode; | |
| 132 device->SetColors = SVGA_SetColors; | |
| 133 device->UpdateRects = NULL; | |
| 134 device->VideoQuit = SVGA_VideoQuit; | |
| 135 device->AllocHWSurface = SVGA_AllocHWSurface; | |
| 136 device->CheckHWBlit = NULL; | |
| 137 device->FillHWRect = NULL; | |
| 138 device->SetHWColorKey = NULL; | |
| 139 device->SetHWAlpha = NULL; | |
| 140 device->LockHWSurface = SVGA_LockHWSurface; | |
| 141 device->UnlockHWSurface = SVGA_UnlockHWSurface; | |
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142 device->FlipHWSurface = SVGA_FlipHWSurface; |
| 0 | 143 device->FreeHWSurface = SVGA_FreeHWSurface; |
| 144 device->SetCaption = NULL; | |
| 145 device->SetIcon = NULL; | |
| 146 device->IconifyWindow = NULL; | |
| 147 device->GrabInput = NULL; | |
| 148 device->GetWMInfo = NULL; | |
| 149 device->InitOSKeymap = SVGA_InitOSKeymap; | |
| 150 device->PumpEvents = SVGA_PumpEvents; | |
| 151 | |
| 152 device->free = SVGA_DeleteDevice; | |
| 153 | |
| 154 return device; | |
| 155 } | |
| 156 | |
| 157 VideoBootStrap SVGALIB_bootstrap = { | |
| 158 "svgalib", "SVGAlib", | |
| 159 SVGA_Available, SVGA_CreateDevice | |
| 160 }; | |
| 161 | |
| 162 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force) | |
| 163 { | |
| 164 vga_modeinfo *modeinfo; | |
| 165 | |
| 166 modeinfo = vga_getmodeinfo(mode); | |
| 167 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) { | |
| 168 int i, j; | |
| 169 | |
| 170 i = modeinfo->bytesperpixel-1; | |
| 171 if ( actually_add ) { | |
| 172 SDL_Rect saved_rect[2]; | |
| 173 int saved_mode[2]; | |
| 174 int b; | |
| 175 | |
| 176 /* Add the mode, sorted largest to smallest */ | |
| 177 b = 0; | |
| 178 j = 0; | |
| 179 while ( (SDL_modelist[i][j]->w > modeinfo->width) || | |
| 180 (SDL_modelist[i][j]->h > modeinfo->height) ) { | |
| 181 ++j; | |
| 182 } | |
| 183 /* Skip modes that are already in our list */ | |
| 184 if ( (SDL_modelist[i][j]->w == modeinfo->width) && | |
| 185 (SDL_modelist[i][j]->h == modeinfo->height) ) { | |
| 186 return(0); | |
| 187 } | |
| 188 /* Insert the new mode */ | |
| 189 saved_rect[b] = *SDL_modelist[i][j]; | |
| 190 saved_mode[b] = SDL_vgamode[i][j]; | |
| 191 SDL_modelist[i][j]->w = modeinfo->width; | |
| 192 SDL_modelist[i][j]->h = modeinfo->height; | |
| 193 SDL_vgamode[i][j] = mode; | |
| 194 /* Everybody scoot down! */ | |
| 195 if ( saved_rect[b].w && saved_rect[b].h ) { | |
| 196 for ( ++j; SDL_modelist[i][j]->w; ++j ) { | |
| 197 saved_rect[!b] = *SDL_modelist[i][j]; | |
| 198 saved_mode[!b] = SDL_vgamode[i][j]; | |
| 199 *SDL_modelist[i][j] = saved_rect[b]; | |
| 200 SDL_vgamode[i][j] = saved_mode[b]; | |
| 201 b = !b; | |
| 202 } | |
| 203 *SDL_modelist[i][j] = saved_rect[b]; | |
| 204 SDL_vgamode[i][j] = saved_mode[b]; | |
| 205 } | |
| 206 } else { | |
| 207 ++SDL_nummodes[i]; | |
| 208 } | |
| 209 } | |
| 210 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) ); | |
| 211 } | |
| 212 | |
| 213 static void SVGA_UpdateVideoInfo(_THIS) | |
| 214 { | |
| 215 vga_modeinfo *modeinfo; | |
| 216 | |
| 217 this->info.wm_available = 0; | |
| 218 this->info.hw_available = 1; | |
| 219 modeinfo = vga_getmodeinfo(vga_getcurrentmode()); | |
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220 this->info.video_mem = modeinfo->memory; |
| 0 | 221 /* FIXME: Add hardware accelerated blit information */ |
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222 #ifdef SVGALIB_DEBUG |
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223 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); |
| 0 | 224 #endif |
| 225 } | |
| 226 | |
| 227 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
| 228 { | |
| 229 int keyboard; | |
| 230 int i, j; | |
| 231 int mode, total_modes; | |
| 232 | |
| 233 /* Initialize all variables that we clean on shutdown */ | |
| 234 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 235 SDL_nummodes[i] = 0; | |
| 236 SDL_modelist[i] = NULL; | |
| 237 SDL_vgamode[i] = NULL; | |
| 238 } | |
| 239 | |
| 240 /* Initialize the library */ | |
| 241 vga_disabledriverreport(); | |
| 242 if ( vga_init() < 0 ) { | |
| 243 SDL_SetError("Unable to initialize SVGAlib"); | |
| 244 return(-1); | |
| 245 } | |
| 246 vga_setmode(TEXT); | |
| 247 | |
| 248 /* Enable mouse and keyboard support */ | |
| 249 vga_setmousesupport(1); | |
| 250 keyboard = keyboard_init_return_fd(); | |
| 251 if ( keyboard < 0 ) { | |
| 252 SDL_SetError("Unable to initialize keyboard"); | |
| 253 return(-1); | |
| 254 } | |
| 255 if ( SVGA_initkeymaps(keyboard) < 0 ) { | |
| 256 return(-1); | |
| 257 } | |
| 258 keyboard_seteventhandler(SVGA_keyboardcallback); | |
| 259 | |
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260 /* Determine the current screen size */ |
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261 this->info.current_w = 0; |
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262 this->info.current_h = 0; |
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263 |
| 0 | 264 /* Determine the screen depth (use default 8-bit depth) */ |
| 265 vformat->BitsPerPixel = 8; | |
| 266 | |
| 267 /* Enumerate the available fullscreen modes */ | |
| 268 total_modes = 0; | |
| 269 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 270 if ( vga_hasmode(mode) ) { | |
| 271 if ( SVGA_AddMode(this, mode, 0, 0) ) { | |
| 272 ++total_modes; | |
| 273 } | |
| 274 } | |
| 275 } | |
| 276 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes; | |
| 277 if ( total_modes == 0 ) { | |
| 278 SDL_SetError("No linear video modes available"); | |
| 279 return(-1); | |
| 280 } | |
| 281 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
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282 SDL_vgamode[i] = (int *)SDL_malloc(SDL_nummodes[i]*sizeof(int)); |
| 0 | 283 if ( SDL_vgamode[i] == NULL ) { |
| 284 SDL_OutOfMemory(); | |
| 285 return(-1); | |
| 286 } | |
| 287 SDL_modelist[i] = (SDL_Rect **) | |
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288 SDL_malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); |
| 0 | 289 if ( SDL_modelist[i] == NULL ) { |
| 290 SDL_OutOfMemory(); | |
| 291 return(-1); | |
| 292 } | |
| 293 for ( j=0; j<SDL_nummodes[i]; ++j ) { | |
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294 SDL_modelist[i][j]=(SDL_Rect *)SDL_malloc(sizeof(SDL_Rect)); |
| 0 | 295 if ( SDL_modelist[i][j] == NULL ) { |
| 296 SDL_OutOfMemory(); | |
| 297 return(-1); | |
| 298 } | |
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299 SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); |
| 0 | 300 } |
| 301 SDL_modelist[i][j] = NULL; | |
| 302 } | |
| 303 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 304 if ( vga_hasmode(mode) ) { | |
| 305 SVGA_AddMode(this, mode, 1, 0); | |
| 306 } | |
| 307 } | |
| 308 SVGA_AddMode(this, G320x200x256, 1, 1); | |
| 309 | |
| 310 /* Free extra (duplicated) modes */ | |
| 311 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 312 j = 0; | |
| 313 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { | |
| 314 j++; | |
| 315 } | |
| 316 while ( SDL_modelist[i][j] ) { | |
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317 SDL_free(SDL_modelist[i][j]); |
| 0 | 318 SDL_modelist[i][j] = NULL; |
| 319 j++; | |
| 320 } | |
| 321 } | |
| 322 | |
| 323 /* Fill in our hardware acceleration capabilities */ | |
| 324 SVGA_UpdateVideoInfo(this); | |
| 325 | |
| 326 /* We're done! */ | |
| 327 return(0); | |
| 328 } | |
| 329 | |
| 330 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
| 331 { | |
| 332 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); | |
| 333 } | |
| 334 | |
| 335 /* Various screen update functions available */ | |
| 336 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 337 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 338 | |
| 339 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, | |
| 340 int width, int height, int bpp, Uint32 flags) | |
| 341 { | |
| 342 int mode; | |
| 343 int vgamode; | |
| 344 vga_modeinfo *modeinfo; | |
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345 int screenpage_len; |
| 0 | 346 |
| 347 /* Try to set the requested linear video mode */ | |
| 348 bpp = (bpp+7)/8-1; | |
| 349 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) { | |
| 350 if ( (SDL_modelist[bpp][mode]->w == width) && | |
| 351 (SDL_modelist[bpp][mode]->h == height) ) { | |
| 352 break; | |
| 353 } | |
| 354 } | |
| 355 if ( SDL_modelist[bpp][mode] == NULL ) { | |
| 356 SDL_SetError("Couldn't find requested mode in list"); | |
| 357 return(NULL); | |
| 358 } | |
| 359 vga_setmode(SDL_vgamode[bpp][mode]); | |
| 360 vga_setpage(0); | |
| 361 | |
| 362 vgamode=SDL_vgamode[bpp][mode]; | |
| 363 if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) { | |
| 364 SDL_SetError("Unable to set linear addressing"); | |
| 365 return(NULL); | |
| 366 } | |
| 367 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]); | |
| 368 | |
| 369 /* Update hardware acceleration info */ | |
| 370 SVGA_UpdateVideoInfo(this); | |
| 371 | |
| 372 /* Allocate the new pixel format for the screen */ | |
| 373 bpp = (bpp+1)*8; | |
| 374 if ( (bpp == 16) && (modeinfo->colors == 32768) ) { | |
| 375 bpp = 15; | |
| 376 } | |
| 377 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) { | |
| 378 return(NULL); | |
| 379 } | |
| 380 | |
| 381 /* Set up the new mode framebuffer */ | |
| 382 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); | |
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383 if ( bpp == 8 ) { |
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384 /* FIXME: What about DirectColor? */ |
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385 current->flags |= SDL_HWPALETTE; |
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386 } |
| 0 | 387 current->w = width; |
| 388 current->h = height; | |
| 389 current->pitch = modeinfo->linewidth; | |
| 390 current->pixels = vga_getgraphmem(); | |
| 391 | |
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392 /* set double-buffering */ |
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393 if ( flags & SDL_DOUBLEBUF ) |
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394 { |
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395 /* length of one screen page in bytes */ |
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396 screenpage_len=current->h*modeinfo->linewidth; |
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397 |
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398 /* if start address should be aligned */ |
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399 if ( modeinfo->linewidth_unit ) |
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400 { |
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401 if ( screenpage_len % modeinfo->linewidth_unit ) |
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402 { |
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403 screenpage_len += modeinfo->linewidth_unit - ( screenpage_len % modeinfo->linewidth_unit ); |
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404 } |
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405 } |
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406 |
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407 /* if we heve enough videomemory = ak je dost videopamete */ |
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408 if ( modeinfo->memory > ( screenpage_len * 2 / 1024 ) ) |
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409 { |
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410 current->flags |= SDL_DOUBLEBUF; |
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411 flip_page = 0; |
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412 flip_offset[0] = 0; |
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413 flip_offset[1] = screenpage_len; |
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414 flip_address[0] = vga_getgraphmem(); |
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415 flip_address[1] = flip_address[0]+screenpage_len; |
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416 SVGA_FlipHWSurface(this,current); |
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417 } |
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418 } |
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419 |
| 0 | 420 /* Set the blit function */ |
| 421 this->UpdateRects = SVGA_DirectUpdate; | |
| 422 | |
| 423 /* Set up the mouse handler again (buggy SVGAlib 1.40) */ | |
| 424 mouse_seteventhandler(SVGA_mousecallback); | |
| 425 | |
| 426 /* We're done */ | |
| 427 return(current); | |
| 428 } | |
| 429 | |
| 430 /* We don't actually allow hardware surfaces other than the main one */ | |
| 431 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 432 { | |
| 433 return(-1); | |
| 434 } | |
| 435 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 436 { | |
| 437 return; | |
| 438 } | |
| 439 | |
| 440 /* We need to wait for vertical retrace on page flipped displays */ | |
| 441 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 442 { | |
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443 /* The waiting is done in SVGA_FlipHWSurface() */ |
| 0 | 444 return(0); |
| 445 } | |
| 446 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 447 { | |
| 448 return; | |
| 449 } | |
| 450 | |
| 451 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 452 { | |
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453 vga_setdisplaystart(flip_offset[flip_page]); |
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454 flip_page=!flip_page; |
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455 surface->pixels=flip_address[flip_page]; |
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456 vga_waitretrace(); |
| 0 | 457 return(0); |
| 458 } | |
| 459 | |
| 460 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 461 { | |
| 462 return; | |
| 463 } | |
| 464 | |
| 465 /* FIXME: Can this be used under SVGAlib? */ | |
| 466 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 467 { | |
| 468 return; | |
| 469 } | |
| 470 | |
| 471 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
| 472 { | |
| 473 int i; | |
| 474 | |
| 475 for(i = 0; i < ncolors; i++) { | |
| 476 vga_setpalette(firstcolor + i, | |
| 477 colors[i].r>>2, | |
| 478 colors[i].g>>2, | |
| 479 colors[i].b>>2); | |
| 480 } | |
| 481 return(1); | |
| 482 } | |
| 483 | |
| 484 /* Note: If we are terminated, this could be called in the middle of | |
| 485 another SDL video routine -- notably UpdateRects. | |
| 486 */ | |
| 487 void SVGA_VideoQuit(_THIS) | |
| 488 { | |
| 489 int i, j; | |
| 490 | |
| 491 /* Reset the console video mode */ | |
| 492 if ( this->screen && (this->screen->w && this->screen->h) ) { | |
| 493 vga_setmode(TEXT); | |
| 494 } | |
| 495 keyboard_close(); | |
| 496 | |
| 497 /* Free video mode lists */ | |
| 498 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 499 if ( SDL_modelist[i] != NULL ) { | |
| 500 for ( j=0; SDL_modelist[i][j]; ++j ) | |
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501 SDL_free(SDL_modelist[i][j]); |
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502 SDL_free(SDL_modelist[i]); |
| 0 | 503 SDL_modelist[i] = NULL; |
| 504 } | |
| 505 if ( SDL_vgamode[i] != NULL ) { | |
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506 SDL_free(SDL_vgamode[i]); |
| 0 | 507 SDL_vgamode[i] = NULL; |
| 508 } | |
| 509 } | |
| 510 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) { | |
| 511 /* Direct screen access, no memory buffer */ | |
| 512 this->screen->pixels = NULL; | |
| 513 } | |
| 514 } | |
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515 |