Mercurial > sdl-ios-xcode
annotate src/video/svga/SDL_svgavideo.c @ 1361:19418e4422cb
New configure-based build system. Still work in progress, but much improved
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 16 Feb 2006 10:11:48 +0000 |
| parents | c71e05b4dc2e |
| children | d910939febfa |
| 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 */ |
| 22 | |
| 23 /* SVGAlib based SDL video driver implementation. | |
| 24 */ | |
| 25 | |
| 26 #include <unistd.h> | |
| 27 #include <sys/stat.h> | |
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28 #include <sys/types.h> |
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29 #include <sys/ioctl.h> |
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30 #include <fcntl.h> |
| 0 | 31 |
| 32 #if defined(linux) | |
| 33 #include <linux/vt.h> | |
| 34 #elif defined(__FreeBSD__) | |
| 35 #include <sys/consio.h> | |
| 36 #else | |
| 37 #error You must choose your operating system here | |
| 38 #endif | |
| 39 #include <vga.h> | |
| 40 #include <vgamouse.h> | |
| 41 #include <vgakeyboard.h> | |
| 42 | |
| 43 #include "SDL_video.h" | |
| 44 #include "SDL_mouse.h" | |
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45 #include "../SDL_sysvideo.h" |
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46 #include "../SDL_pixels_c.h" |
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47 #include "../../events/SDL_events_c.h" |
| 0 | 48 #include "SDL_svgavideo.h" |
| 49 #include "SDL_svgaevents_c.h" | |
| 50 #include "SDL_svgamouse_c.h" | |
| 51 | |
| 52 | |
| 53 /* Initialization/Query functions */ | |
| 54 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat); | |
| 55 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); | |
| 56 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); | |
| 57 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors, | |
| 58 SDL_Color *colors); | |
| 59 static void SVGA_VideoQuit(_THIS); | |
| 60 | |
| 61 /* Hardware surface functions */ | |
| 62 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface); | |
| 63 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface); | |
| 64 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface); | |
| 65 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface); | |
| 66 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface); | |
| 67 | |
| 68 /* SVGAlib driver bootstrap functions */ | |
| 69 | |
| 70 static int SVGA_Available(void) | |
| 71 { | |
| 72 /* Check to see if we are root and stdin is a virtual console */ | |
| 73 int console; | |
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74 |
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75 /* SVGALib 1.9.x+ doesn't require root (via /dev/svga) */ |
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76 int svgalib2 = -1; |
| 0 | 77 |
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78 /* See if we are connected to a virtual terminal */ |
| 0 | 79 console = STDIN_FILENO; |
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80 #if 0 /* This is no longer needed, SVGAlib can switch consoles for us */ |
| 0 | 81 if ( console >= 0 ) { |
| 82 struct stat sb; | |
| 83 struct vt_mode dummy; | |
| 84 | |
| 85 if ( (fstat(console, &sb) < 0) || | |
| 86 (ioctl(console, VT_GETMODE, &dummy) < 0) ) { | |
| 87 console = -1; | |
| 88 } | |
| 89 } | |
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90 #endif /* 0 */ |
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91 |
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92 /* See if SVGAlib 2.0 is available */ |
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93 svgalib2 = open("/dev/svga", O_RDONLY); |
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94 if (svgalib2 != -1) { |
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95 close(svgalib2); |
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96 } |
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97 |
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98 return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
| 0 | 99 } |
| 100 | |
| 101 static void SVGA_DeleteDevice(SDL_VideoDevice *device) | |
| 102 { | |
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103 SDL_free(device->hidden); |
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104 SDL_free(device); |
| 0 | 105 } |
| 106 | |
| 107 static SDL_VideoDevice *SVGA_CreateDevice(int devindex) | |
| 108 { | |
| 109 SDL_VideoDevice *device; | |
| 110 | |
| 111 /* Initialize all variables that we clean on shutdown */ | |
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112 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 0 | 113 if ( device ) { |
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114 SDL_memset(device, 0, (sizeof *device)); |
| 0 | 115 device->hidden = (struct SDL_PrivateVideoData *) |
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116 SDL_malloc((sizeof *device->hidden)); |
| 0 | 117 } |
| 118 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 119 SDL_OutOfMemory(); | |
| 120 if ( device ) { | |
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121 SDL_free(device); |
| 0 | 122 } |
| 123 return(0); | |
| 124 } | |
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125 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 0 | 126 |
| 127 /* Set the function pointers */ | |
| 128 device->VideoInit = SVGA_VideoInit; | |
| 129 device->ListModes = SVGA_ListModes; | |
| 130 device->SetVideoMode = SVGA_SetVideoMode; | |
| 131 device->SetColors = SVGA_SetColors; | |
| 132 device->UpdateRects = NULL; | |
| 133 device->VideoQuit = SVGA_VideoQuit; | |
| 134 device->AllocHWSurface = SVGA_AllocHWSurface; | |
| 135 device->CheckHWBlit = NULL; | |
| 136 device->FillHWRect = NULL; | |
| 137 device->SetHWColorKey = NULL; | |
| 138 device->SetHWAlpha = NULL; | |
| 139 device->LockHWSurface = SVGA_LockHWSurface; | |
| 140 device->UnlockHWSurface = SVGA_UnlockHWSurface; | |
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141 device->FlipHWSurface = SVGA_FlipHWSurface; |
| 0 | 142 device->FreeHWSurface = SVGA_FreeHWSurface; |
| 143 device->SetCaption = NULL; | |
| 144 device->SetIcon = NULL; | |
| 145 device->IconifyWindow = NULL; | |
| 146 device->GrabInput = NULL; | |
| 147 device->GetWMInfo = NULL; | |
| 148 device->InitOSKeymap = SVGA_InitOSKeymap; | |
| 149 device->PumpEvents = SVGA_PumpEvents; | |
| 150 | |
| 151 device->free = SVGA_DeleteDevice; | |
| 152 | |
| 153 return device; | |
| 154 } | |
| 155 | |
| 156 VideoBootStrap SVGALIB_bootstrap = { | |
| 157 "svgalib", "SVGAlib", | |
| 158 SVGA_Available, SVGA_CreateDevice | |
| 159 }; | |
| 160 | |
| 161 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force) | |
| 162 { | |
| 163 vga_modeinfo *modeinfo; | |
| 164 | |
| 165 modeinfo = vga_getmodeinfo(mode); | |
| 166 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) { | |
| 167 int i, j; | |
| 168 | |
| 169 i = modeinfo->bytesperpixel-1; | |
| 170 if ( actually_add ) { | |
| 171 SDL_Rect saved_rect[2]; | |
| 172 int saved_mode[2]; | |
| 173 int b; | |
| 174 | |
| 175 /* Add the mode, sorted largest to smallest */ | |
| 176 b = 0; | |
| 177 j = 0; | |
| 178 while ( (SDL_modelist[i][j]->w > modeinfo->width) || | |
| 179 (SDL_modelist[i][j]->h > modeinfo->height) ) { | |
| 180 ++j; | |
| 181 } | |
| 182 /* Skip modes that are already in our list */ | |
| 183 if ( (SDL_modelist[i][j]->w == modeinfo->width) && | |
| 184 (SDL_modelist[i][j]->h == modeinfo->height) ) { | |
| 185 return(0); | |
| 186 } | |
| 187 /* Insert the new mode */ | |
| 188 saved_rect[b] = *SDL_modelist[i][j]; | |
| 189 saved_mode[b] = SDL_vgamode[i][j]; | |
| 190 SDL_modelist[i][j]->w = modeinfo->width; | |
| 191 SDL_modelist[i][j]->h = modeinfo->height; | |
| 192 SDL_vgamode[i][j] = mode; | |
| 193 /* Everybody scoot down! */ | |
| 194 if ( saved_rect[b].w && saved_rect[b].h ) { | |
| 195 for ( ++j; SDL_modelist[i][j]->w; ++j ) { | |
| 196 saved_rect[!b] = *SDL_modelist[i][j]; | |
| 197 saved_mode[!b] = SDL_vgamode[i][j]; | |
| 198 *SDL_modelist[i][j] = saved_rect[b]; | |
| 199 SDL_vgamode[i][j] = saved_mode[b]; | |
| 200 b = !b; | |
| 201 } | |
| 202 *SDL_modelist[i][j] = saved_rect[b]; | |
| 203 SDL_vgamode[i][j] = saved_mode[b]; | |
| 204 } | |
| 205 } else { | |
| 206 ++SDL_nummodes[i]; | |
| 207 } | |
| 208 } | |
| 209 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) ); | |
| 210 } | |
| 211 | |
| 212 static void SVGA_UpdateVideoInfo(_THIS) | |
| 213 { | |
| 214 vga_modeinfo *modeinfo; | |
| 215 | |
| 216 this->info.wm_available = 0; | |
| 217 this->info.hw_available = 1; | |
| 218 modeinfo = vga_getmodeinfo(vga_getcurrentmode()); | |
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219 this->info.video_mem = modeinfo->memory; |
| 0 | 220 /* FIXME: Add hardware accelerated blit information */ |
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221 #ifdef SVGALIB_DEBUG |
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222 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); |
| 0 | 223 #endif |
| 224 } | |
| 225 | |
| 226 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
| 227 { | |
| 228 int keyboard; | |
| 229 int i, j; | |
| 230 int mode, total_modes; | |
| 231 | |
| 232 /* Initialize all variables that we clean on shutdown */ | |
| 233 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 234 SDL_nummodes[i] = 0; | |
| 235 SDL_modelist[i] = NULL; | |
| 236 SDL_vgamode[i] = NULL; | |
| 237 } | |
| 238 | |
| 239 /* Initialize the library */ | |
| 240 vga_disabledriverreport(); | |
| 241 if ( vga_init() < 0 ) { | |
| 242 SDL_SetError("Unable to initialize SVGAlib"); | |
| 243 return(-1); | |
| 244 } | |
| 245 vga_setmode(TEXT); | |
| 246 | |
| 247 /* Enable mouse and keyboard support */ | |
| 248 vga_setmousesupport(1); | |
| 249 keyboard = keyboard_init_return_fd(); | |
| 250 if ( keyboard < 0 ) { | |
| 251 SDL_SetError("Unable to initialize keyboard"); | |
| 252 return(-1); | |
| 253 } | |
| 254 if ( SVGA_initkeymaps(keyboard) < 0 ) { | |
| 255 return(-1); | |
| 256 } | |
| 257 keyboard_seteventhandler(SVGA_keyboardcallback); | |
| 258 | |
| 259 /* Determine the screen depth (use default 8-bit depth) */ | |
| 260 vformat->BitsPerPixel = 8; | |
| 261 | |
| 262 /* Enumerate the available fullscreen modes */ | |
| 263 total_modes = 0; | |
| 264 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 265 if ( vga_hasmode(mode) ) { | |
| 266 if ( SVGA_AddMode(this, mode, 0, 0) ) { | |
| 267 ++total_modes; | |
| 268 } | |
| 269 } | |
| 270 } | |
| 271 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes; | |
| 272 if ( total_modes == 0 ) { | |
| 273 SDL_SetError("No linear video modes available"); | |
| 274 return(-1); | |
| 275 } | |
| 276 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
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277 SDL_vgamode[i] = (int *)SDL_malloc(SDL_nummodes[i]*sizeof(int)); |
| 0 | 278 if ( SDL_vgamode[i] == NULL ) { |
| 279 SDL_OutOfMemory(); | |
| 280 return(-1); | |
| 281 } | |
| 282 SDL_modelist[i] = (SDL_Rect **) | |
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283 SDL_malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); |
| 0 | 284 if ( SDL_modelist[i] == NULL ) { |
| 285 SDL_OutOfMemory(); | |
| 286 return(-1); | |
| 287 } | |
| 288 for ( j=0; j<SDL_nummodes[i]; ++j ) { | |
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289 SDL_modelist[i][j]=(SDL_Rect *)SDL_malloc(sizeof(SDL_Rect)); |
| 0 | 290 if ( SDL_modelist[i][j] == NULL ) { |
| 291 SDL_OutOfMemory(); | |
| 292 return(-1); | |
| 293 } | |
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294 SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); |
| 0 | 295 } |
| 296 SDL_modelist[i][j] = NULL; | |
| 297 } | |
| 298 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 299 if ( vga_hasmode(mode) ) { | |
| 300 SVGA_AddMode(this, mode, 1, 0); | |
| 301 } | |
| 302 } | |
| 303 SVGA_AddMode(this, G320x200x256, 1, 1); | |
| 304 | |
| 305 /* Free extra (duplicated) modes */ | |
| 306 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 307 j = 0; | |
| 308 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { | |
| 309 j++; | |
| 310 } | |
| 311 while ( SDL_modelist[i][j] ) { | |
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312 SDL_free(SDL_modelist[i][j]); |
| 0 | 313 SDL_modelist[i][j] = NULL; |
| 314 j++; | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 /* Fill in our hardware acceleration capabilities */ | |
| 319 SVGA_UpdateVideoInfo(this); | |
| 320 | |
| 321 /* We're done! */ | |
| 322 return(0); | |
| 323 } | |
| 324 | |
| 325 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
| 326 { | |
| 327 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); | |
| 328 } | |
| 329 | |
| 330 /* Various screen update functions available */ | |
| 331 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 332 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 333 | |
| 334 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, | |
| 335 int width, int height, int bpp, Uint32 flags) | |
| 336 { | |
| 337 int mode; | |
| 338 int vgamode; | |
| 339 vga_modeinfo *modeinfo; | |
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340 int screenpage_len; |
| 0 | 341 |
| 342 /* Try to set the requested linear video mode */ | |
| 343 bpp = (bpp+7)/8-1; | |
| 344 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) { | |
| 345 if ( (SDL_modelist[bpp][mode]->w == width) && | |
| 346 (SDL_modelist[bpp][mode]->h == height) ) { | |
| 347 break; | |
| 348 } | |
| 349 } | |
| 350 if ( SDL_modelist[bpp][mode] == NULL ) { | |
| 351 SDL_SetError("Couldn't find requested mode in list"); | |
| 352 return(NULL); | |
| 353 } | |
| 354 vga_setmode(SDL_vgamode[bpp][mode]); | |
| 355 vga_setpage(0); | |
| 356 | |
| 357 vgamode=SDL_vgamode[bpp][mode]; | |
| 358 if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) { | |
| 359 SDL_SetError("Unable to set linear addressing"); | |
| 360 return(NULL); | |
| 361 } | |
| 362 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]); | |
| 363 | |
| 364 /* Update hardware acceleration info */ | |
| 365 SVGA_UpdateVideoInfo(this); | |
| 366 | |
| 367 /* Allocate the new pixel format for the screen */ | |
| 368 bpp = (bpp+1)*8; | |
| 369 if ( (bpp == 16) && (modeinfo->colors == 32768) ) { | |
| 370 bpp = 15; | |
| 371 } | |
| 372 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) { | |
| 373 return(NULL); | |
| 374 } | |
| 375 | |
| 376 /* Set up the new mode framebuffer */ | |
| 377 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); | |
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378 if ( bpp == 8 ) { |
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379 /* FIXME: What about DirectColor? */ |
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380 current->flags |= SDL_HWPALETTE; |
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381 } |
| 0 | 382 current->w = width; |
| 383 current->h = height; | |
| 384 current->pitch = modeinfo->linewidth; | |
| 385 current->pixels = vga_getgraphmem(); | |
| 386 | |
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387 /* set double-buffering */ |
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388 if ( flags & SDL_DOUBLEBUF ) |
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389 { |
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390 /* length of one screen page in bytes */ |
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391 screenpage_len=current->h*modeinfo->linewidth; |
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392 |
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393 /* if start address should be aligned */ |
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394 if ( modeinfo->linewidth_unit ) |
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395 { |
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396 if ( screenpage_len % modeinfo->linewidth_unit ) |
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397 { |
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398 screenpage_len += modeinfo->linewidth_unit - ( screenpage_len % modeinfo->linewidth_unit ); |
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399 } |
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400 } |
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401 |
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402 /* if we heve enough videomemory = ak je dost videopamete */ |
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403 if ( modeinfo->memory > ( screenpage_len * 2 / 1024 ) ) |
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404 { |
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405 current->flags |= SDL_DOUBLEBUF; |
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406 flip_page = 0; |
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407 flip_offset[0] = 0; |
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408 flip_offset[1] = screenpage_len; |
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409 flip_address[0] = vga_getgraphmem(); |
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410 flip_address[1] = flip_address[0]+screenpage_len; |
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411 SVGA_FlipHWSurface(this,current); |
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412 } |
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413 } |
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414 |
| 0 | 415 /* Set the blit function */ |
| 416 this->UpdateRects = SVGA_DirectUpdate; | |
| 417 | |
| 418 /* Set up the mouse handler again (buggy SVGAlib 1.40) */ | |
| 419 mouse_seteventhandler(SVGA_mousecallback); | |
| 420 | |
| 421 /* We're done */ | |
| 422 return(current); | |
| 423 } | |
| 424 | |
| 425 /* We don't actually allow hardware surfaces other than the main one */ | |
| 426 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 427 { | |
| 428 return(-1); | |
| 429 } | |
| 430 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 431 { | |
| 432 return; | |
| 433 } | |
| 434 | |
| 435 /* We need to wait for vertical retrace on page flipped displays */ | |
| 436 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 437 { | |
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438 /* The waiting is done in SVGA_FlipHWSurface() */ |
| 0 | 439 return(0); |
| 440 } | |
| 441 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 442 { | |
| 443 return; | |
| 444 } | |
| 445 | |
| 446 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 447 { | |
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448 vga_setdisplaystart(flip_offset[flip_page]); |
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449 flip_page=!flip_page; |
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450 surface->pixels=flip_address[flip_page]; |
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451 vga_waitretrace(); |
| 0 | 452 return(0); |
| 453 } | |
| 454 | |
| 455 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 456 { | |
| 457 return; | |
| 458 } | |
| 459 | |
| 460 /* FIXME: Can this be used under SVGAlib? */ | |
| 461 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 462 { | |
| 463 return; | |
| 464 } | |
| 465 | |
| 466 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
| 467 { | |
| 468 int i; | |
| 469 | |
| 470 for(i = 0; i < ncolors; i++) { | |
| 471 vga_setpalette(firstcolor + i, | |
| 472 colors[i].r>>2, | |
| 473 colors[i].g>>2, | |
| 474 colors[i].b>>2); | |
| 475 } | |
| 476 return(1); | |
| 477 } | |
| 478 | |
| 479 /* Note: If we are terminated, this could be called in the middle of | |
| 480 another SDL video routine -- notably UpdateRects. | |
| 481 */ | |
| 482 void SVGA_VideoQuit(_THIS) | |
| 483 { | |
| 484 int i, j; | |
| 485 | |
| 486 /* Reset the console video mode */ | |
| 487 if ( this->screen && (this->screen->w && this->screen->h) ) { | |
| 488 vga_setmode(TEXT); | |
| 489 } | |
| 490 keyboard_close(); | |
| 491 | |
| 492 /* Free video mode lists */ | |
| 493 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 494 if ( SDL_modelist[i] != NULL ) { | |
| 495 for ( j=0; SDL_modelist[i][j]; ++j ) | |
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496 SDL_free(SDL_modelist[i][j]); |
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497 SDL_free(SDL_modelist[i]); |
| 0 | 498 SDL_modelist[i] = NULL; |
| 499 } | |
| 500 if ( SDL_vgamode[i] != NULL ) { | |
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501 SDL_free(SDL_vgamode[i]); |
| 0 | 502 SDL_vgamode[i] = NULL; |
| 503 } | |
| 504 } | |
| 505 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) { | |
| 506 /* Direct screen access, no memory buffer */ | |
| 507 this->screen->pixels = NULL; | |
| 508 } | |
| 509 } | |
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510 |