Mercurial > sdl-ios-xcode
annotate src/video/svga/SDL_svgavideo.c @ 1338:604d73db6802
Removed uses of stdlib.h and string.h
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Feb 2006 09:29:18 +0000 |
| parents | 3692456e7b0f |
| children | c71e05b4dc2e |
| 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.h" | |
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44 #include "SDL_stdlib.h" |
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45 #include "SDL_string.h" |
| 0 | 46 #include "SDL_error.h" |
| 47 #include "SDL_video.h" | |
| 48 #include "SDL_mouse.h" | |
| 49 #include "SDL_sysvideo.h" | |
| 50 #include "SDL_pixels_c.h" | |
| 51 #include "SDL_events_c.h" | |
| 52 #include "SDL_svgavideo.h" | |
| 53 #include "SDL_svgaevents_c.h" | |
| 54 #include "SDL_svgamouse_c.h" | |
| 55 | |
| 56 | |
| 57 /* Initialization/Query functions */ | |
| 58 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat); | |
| 59 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); | |
| 60 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); | |
| 61 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors, | |
| 62 SDL_Color *colors); | |
| 63 static void SVGA_VideoQuit(_THIS); | |
| 64 | |
| 65 /* Hardware surface functions */ | |
| 66 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface); | |
| 67 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface); | |
| 68 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface); | |
| 69 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface); | |
| 70 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface); | |
| 71 | |
| 72 /* SVGAlib driver bootstrap functions */ | |
| 73 | |
| 74 static int SVGA_Available(void) | |
| 75 { | |
| 76 /* Check to see if we are root and stdin is a virtual console */ | |
| 77 int console; | |
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78 |
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79 /* SVGALib 1.9.x+ doesn't require root (via /dev/svga) */ |
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80 int svgalib2 = -1; |
| 0 | 81 |
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82 /* See if we are connected to a virtual terminal */ |
| 0 | 83 console = STDIN_FILENO; |
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84 #if 0 /* This is no longer needed, SVGAlib can switch consoles for us */ |
| 0 | 85 if ( console >= 0 ) { |
| 86 struct stat sb; | |
| 87 struct vt_mode dummy; | |
| 88 | |
| 89 if ( (fstat(console, &sb) < 0) || | |
| 90 (ioctl(console, VT_GETMODE, &dummy) < 0) ) { | |
| 91 console = -1; | |
| 92 } | |
| 93 } | |
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94 #endif /* 0 */ |
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95 |
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96 /* See if SVGAlib 2.0 is available */ |
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97 svgalib2 = open("/dev/svga", O_RDONLY); |
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98 if (svgalib2 != -1) { |
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99 close(svgalib2); |
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100 } |
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101 |
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102 return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
| 0 | 103 } |
| 104 | |
| 105 static void SVGA_DeleteDevice(SDL_VideoDevice *device) | |
| 106 { | |
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107 SDL_free(device->hidden); |
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108 SDL_free(device); |
| 0 | 109 } |
| 110 | |
| 111 static SDL_VideoDevice *SVGA_CreateDevice(int devindex) | |
| 112 { | |
| 113 SDL_VideoDevice *device; | |
| 114 | |
| 115 /* Initialize all variables that we clean on shutdown */ | |
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116 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 0 | 117 if ( device ) { |
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118 SDL_memset(device, 0, (sizeof *device)); |
| 0 | 119 device->hidden = (struct SDL_PrivateVideoData *) |
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120 SDL_malloc((sizeof *device->hidden)); |
| 0 | 121 } |
| 122 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 123 SDL_OutOfMemory(); | |
| 124 if ( device ) { | |
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125 SDL_free(device); |
| 0 | 126 } |
| 127 return(0); | |
| 128 } | |
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129 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 0 | 130 |
| 131 /* Set the function pointers */ | |
| 132 device->VideoInit = SVGA_VideoInit; | |
| 133 device->ListModes = SVGA_ListModes; | |
| 134 device->SetVideoMode = SVGA_SetVideoMode; | |
| 135 device->SetColors = SVGA_SetColors; | |
| 136 device->UpdateRects = NULL; | |
| 137 device->VideoQuit = SVGA_VideoQuit; | |
| 138 device->AllocHWSurface = SVGA_AllocHWSurface; | |
| 139 device->CheckHWBlit = NULL; | |
| 140 device->FillHWRect = NULL; | |
| 141 device->SetHWColorKey = NULL; | |
| 142 device->SetHWAlpha = NULL; | |
| 143 device->LockHWSurface = SVGA_LockHWSurface; | |
| 144 device->UnlockHWSurface = SVGA_UnlockHWSurface; | |
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145 device->FlipHWSurface = SVGA_FlipHWSurface; |
| 0 | 146 device->FreeHWSurface = SVGA_FreeHWSurface; |
| 147 device->SetCaption = NULL; | |
| 148 device->SetIcon = NULL; | |
| 149 device->IconifyWindow = NULL; | |
| 150 device->GrabInput = NULL; | |
| 151 device->GetWMInfo = NULL; | |
| 152 device->InitOSKeymap = SVGA_InitOSKeymap; | |
| 153 device->PumpEvents = SVGA_PumpEvents; | |
| 154 | |
| 155 device->free = SVGA_DeleteDevice; | |
| 156 | |
| 157 return device; | |
| 158 } | |
| 159 | |
| 160 VideoBootStrap SVGALIB_bootstrap = { | |
| 161 "svgalib", "SVGAlib", | |
| 162 SVGA_Available, SVGA_CreateDevice | |
| 163 }; | |
| 164 | |
| 165 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force) | |
| 166 { | |
| 167 vga_modeinfo *modeinfo; | |
| 168 | |
| 169 modeinfo = vga_getmodeinfo(mode); | |
| 170 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) { | |
| 171 int i, j; | |
| 172 | |
| 173 i = modeinfo->bytesperpixel-1; | |
| 174 if ( actually_add ) { | |
| 175 SDL_Rect saved_rect[2]; | |
| 176 int saved_mode[2]; | |
| 177 int b; | |
| 178 | |
| 179 /* Add the mode, sorted largest to smallest */ | |
| 180 b = 0; | |
| 181 j = 0; | |
| 182 while ( (SDL_modelist[i][j]->w > modeinfo->width) || | |
| 183 (SDL_modelist[i][j]->h > modeinfo->height) ) { | |
| 184 ++j; | |
| 185 } | |
| 186 /* Skip modes that are already in our list */ | |
| 187 if ( (SDL_modelist[i][j]->w == modeinfo->width) && | |
| 188 (SDL_modelist[i][j]->h == modeinfo->height) ) { | |
| 189 return(0); | |
| 190 } | |
| 191 /* Insert the new mode */ | |
| 192 saved_rect[b] = *SDL_modelist[i][j]; | |
| 193 saved_mode[b] = SDL_vgamode[i][j]; | |
| 194 SDL_modelist[i][j]->w = modeinfo->width; | |
| 195 SDL_modelist[i][j]->h = modeinfo->height; | |
| 196 SDL_vgamode[i][j] = mode; | |
| 197 /* Everybody scoot down! */ | |
| 198 if ( saved_rect[b].w && saved_rect[b].h ) { | |
| 199 for ( ++j; SDL_modelist[i][j]->w; ++j ) { | |
| 200 saved_rect[!b] = *SDL_modelist[i][j]; | |
| 201 saved_mode[!b] = SDL_vgamode[i][j]; | |
| 202 *SDL_modelist[i][j] = saved_rect[b]; | |
| 203 SDL_vgamode[i][j] = saved_mode[b]; | |
| 204 b = !b; | |
| 205 } | |
| 206 *SDL_modelist[i][j] = saved_rect[b]; | |
| 207 SDL_vgamode[i][j] = saved_mode[b]; | |
| 208 } | |
| 209 } else { | |
| 210 ++SDL_nummodes[i]; | |
| 211 } | |
| 212 } | |
| 213 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) ); | |
| 214 } | |
| 215 | |
| 216 static void SVGA_UpdateVideoInfo(_THIS) | |
| 217 { | |
| 218 vga_modeinfo *modeinfo; | |
| 219 | |
| 220 this->info.wm_available = 0; | |
| 221 this->info.hw_available = 1; | |
| 222 modeinfo = vga_getmodeinfo(vga_getcurrentmode()); | |
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223 this->info.video_mem = modeinfo->memory; |
| 0 | 224 /* FIXME: Add hardware accelerated blit information */ |
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225 #ifdef SVGALIB_DEBUG |
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226 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); |
| 0 | 227 #endif |
| 228 } | |
| 229 | |
| 230 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
| 231 { | |
| 232 int keyboard; | |
| 233 int i, j; | |
| 234 int mode, total_modes; | |
| 235 | |
| 236 /* Initialize all variables that we clean on shutdown */ | |
| 237 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 238 SDL_nummodes[i] = 0; | |
| 239 SDL_modelist[i] = NULL; | |
| 240 SDL_vgamode[i] = NULL; | |
| 241 } | |
| 242 | |
| 243 /* Initialize the library */ | |
| 244 vga_disabledriverreport(); | |
| 245 if ( vga_init() < 0 ) { | |
| 246 SDL_SetError("Unable to initialize SVGAlib"); | |
| 247 return(-1); | |
| 248 } | |
| 249 vga_setmode(TEXT); | |
| 250 | |
| 251 /* Enable mouse and keyboard support */ | |
| 252 vga_setmousesupport(1); | |
| 253 keyboard = keyboard_init_return_fd(); | |
| 254 if ( keyboard < 0 ) { | |
| 255 SDL_SetError("Unable to initialize keyboard"); | |
| 256 return(-1); | |
| 257 } | |
| 258 if ( SVGA_initkeymaps(keyboard) < 0 ) { | |
| 259 return(-1); | |
| 260 } | |
| 261 keyboard_seteventhandler(SVGA_keyboardcallback); | |
| 262 | |
| 263 /* Determine the screen depth (use default 8-bit depth) */ | |
| 264 vformat->BitsPerPixel = 8; | |
| 265 | |
| 266 /* Enumerate the available fullscreen modes */ | |
| 267 total_modes = 0; | |
| 268 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 269 if ( vga_hasmode(mode) ) { | |
| 270 if ( SVGA_AddMode(this, mode, 0, 0) ) { | |
| 271 ++total_modes; | |
| 272 } | |
| 273 } | |
| 274 } | |
| 275 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes; | |
| 276 if ( total_modes == 0 ) { | |
| 277 SDL_SetError("No linear video modes available"); | |
| 278 return(-1); | |
| 279 } | |
| 280 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
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281 SDL_vgamode[i] = (int *)SDL_malloc(SDL_nummodes[i]*sizeof(int)); |
| 0 | 282 if ( SDL_vgamode[i] == NULL ) { |
| 283 SDL_OutOfMemory(); | |
| 284 return(-1); | |
| 285 } | |
| 286 SDL_modelist[i] = (SDL_Rect **) | |
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287 SDL_malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); |
| 0 | 288 if ( SDL_modelist[i] == NULL ) { |
| 289 SDL_OutOfMemory(); | |
| 290 return(-1); | |
| 291 } | |
| 292 for ( j=0; j<SDL_nummodes[i]; ++j ) { | |
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293 SDL_modelist[i][j]=(SDL_Rect *)SDL_malloc(sizeof(SDL_Rect)); |
| 0 | 294 if ( SDL_modelist[i][j] == NULL ) { |
| 295 SDL_OutOfMemory(); | |
| 296 return(-1); | |
| 297 } | |
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298 SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); |
| 0 | 299 } |
| 300 SDL_modelist[i][j] = NULL; | |
| 301 } | |
| 302 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 303 if ( vga_hasmode(mode) ) { | |
| 304 SVGA_AddMode(this, mode, 1, 0); | |
| 305 } | |
| 306 } | |
| 307 SVGA_AddMode(this, G320x200x256, 1, 1); | |
| 308 | |
| 309 /* Free extra (duplicated) modes */ | |
| 310 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 311 j = 0; | |
| 312 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { | |
| 313 j++; | |
| 314 } | |
| 315 while ( SDL_modelist[i][j] ) { | |
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316 SDL_free(SDL_modelist[i][j]); |
| 0 | 317 SDL_modelist[i][j] = NULL; |
| 318 j++; | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 /* Fill in our hardware acceleration capabilities */ | |
| 323 SVGA_UpdateVideoInfo(this); | |
| 324 | |
| 325 /* We're done! */ | |
| 326 return(0); | |
| 327 } | |
| 328 | |
| 329 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
| 330 { | |
| 331 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); | |
| 332 } | |
| 333 | |
| 334 /* Various screen update functions available */ | |
| 335 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 336 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 337 | |
| 338 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, | |
| 339 int width, int height, int bpp, Uint32 flags) | |
| 340 { | |
| 341 int mode; | |
| 342 int vgamode; | |
| 343 vga_modeinfo *modeinfo; | |
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344 int screenpage_len; |
| 0 | 345 |
| 346 /* Try to set the requested linear video mode */ | |
| 347 bpp = (bpp+7)/8-1; | |
| 348 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) { | |
| 349 if ( (SDL_modelist[bpp][mode]->w == width) && | |
| 350 (SDL_modelist[bpp][mode]->h == height) ) { | |
| 351 break; | |
| 352 } | |
| 353 } | |
| 354 if ( SDL_modelist[bpp][mode] == NULL ) { | |
| 355 SDL_SetError("Couldn't find requested mode in list"); | |
| 356 return(NULL); | |
| 357 } | |
| 358 vga_setmode(SDL_vgamode[bpp][mode]); | |
| 359 vga_setpage(0); | |
| 360 | |
| 361 vgamode=SDL_vgamode[bpp][mode]; | |
| 362 if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) { | |
| 363 SDL_SetError("Unable to set linear addressing"); | |
| 364 return(NULL); | |
| 365 } | |
| 366 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]); | |
| 367 | |
| 368 /* Update hardware acceleration info */ | |
| 369 SVGA_UpdateVideoInfo(this); | |
| 370 | |
| 371 /* Allocate the new pixel format for the screen */ | |
| 372 bpp = (bpp+1)*8; | |
| 373 if ( (bpp == 16) && (modeinfo->colors == 32768) ) { | |
| 374 bpp = 15; | |
| 375 } | |
| 376 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) { | |
| 377 return(NULL); | |
| 378 } | |
| 379 | |
| 380 /* Set up the new mode framebuffer */ | |
| 381 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); | |
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382 if ( bpp == 8 ) { |
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383 /* FIXME: What about DirectColor? */ |
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384 current->flags |= SDL_HWPALETTE; |
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385 } |
| 0 | 386 current->w = width; |
| 387 current->h = height; | |
| 388 current->pitch = modeinfo->linewidth; | |
| 389 current->pixels = vga_getgraphmem(); | |
| 390 | |
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391 /* set double-buffering */ |
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392 if ( flags & SDL_DOUBLEBUF ) |
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393 { |
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394 /* length of one screen page in bytes */ |
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395 screenpage_len=current->h*modeinfo->linewidth; |
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396 |
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397 /* if start address should be aligned */ |
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398 if ( modeinfo->linewidth_unit ) |
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399 { |
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400 if ( screenpage_len % modeinfo->linewidth_unit ) |
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401 { |
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402 screenpage_len += modeinfo->linewidth_unit - ( screenpage_len % modeinfo->linewidth_unit ); |
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403 } |
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404 } |
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405 |
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406 /* if we heve enough videomemory = ak je dost videopamete */ |
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407 if ( modeinfo->memory > ( screenpage_len * 2 / 1024 ) ) |
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408 { |
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409 current->flags |= SDL_DOUBLEBUF; |
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410 flip_page = 0; |
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411 flip_offset[0] = 0; |
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412 flip_offset[1] = screenpage_len; |
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413 flip_address[0] = vga_getgraphmem(); |
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414 flip_address[1] = flip_address[0]+screenpage_len; |
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415 SVGA_FlipHWSurface(this,current); |
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416 } |
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417 } |
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418 |
| 0 | 419 /* Set the blit function */ |
| 420 this->UpdateRects = SVGA_DirectUpdate; | |
| 421 | |
| 422 /* Set up the mouse handler again (buggy SVGAlib 1.40) */ | |
| 423 mouse_seteventhandler(SVGA_mousecallback); | |
| 424 | |
| 425 /* We're done */ | |
| 426 return(current); | |
| 427 } | |
| 428 | |
| 429 /* We don't actually allow hardware surfaces other than the main one */ | |
| 430 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 431 { | |
| 432 return(-1); | |
| 433 } | |
| 434 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 435 { | |
| 436 return; | |
| 437 } | |
| 438 | |
| 439 /* We need to wait for vertical retrace on page flipped displays */ | |
| 440 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 441 { | |
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442 /* The waiting is done in SVGA_FlipHWSurface() */ |
| 0 | 443 return(0); |
| 444 } | |
| 445 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 446 { | |
| 447 return; | |
| 448 } | |
| 449 | |
| 450 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 451 { | |
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452 vga_setdisplaystart(flip_offset[flip_page]); |
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453 flip_page=!flip_page; |
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454 surface->pixels=flip_address[flip_page]; |
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455 vga_waitretrace(); |
| 0 | 456 return(0); |
| 457 } | |
| 458 | |
| 459 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 460 { | |
| 461 return; | |
| 462 } | |
| 463 | |
| 464 /* FIXME: Can this be used under SVGAlib? */ | |
| 465 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 466 { | |
| 467 return; | |
| 468 } | |
| 469 | |
| 470 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
| 471 { | |
| 472 int i; | |
| 473 | |
| 474 for(i = 0; i < ncolors; i++) { | |
| 475 vga_setpalette(firstcolor + i, | |
| 476 colors[i].r>>2, | |
| 477 colors[i].g>>2, | |
| 478 colors[i].b>>2); | |
| 479 } | |
| 480 return(1); | |
| 481 } | |
| 482 | |
| 483 /* Note: If we are terminated, this could be called in the middle of | |
| 484 another SDL video routine -- notably UpdateRects. | |
| 485 */ | |
| 486 void SVGA_VideoQuit(_THIS) | |
| 487 { | |
| 488 int i, j; | |
| 489 | |
| 490 /* Reset the console video mode */ | |
| 491 if ( this->screen && (this->screen->w && this->screen->h) ) { | |
| 492 vga_setmode(TEXT); | |
| 493 } | |
| 494 keyboard_close(); | |
| 495 | |
| 496 /* Free video mode lists */ | |
| 497 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 498 if ( SDL_modelist[i] != NULL ) { | |
| 499 for ( j=0; SDL_modelist[i][j]; ++j ) | |
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500 SDL_free(SDL_modelist[i][j]); |
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501 SDL_free(SDL_modelist[i]); |
| 0 | 502 SDL_modelist[i] = NULL; |
| 503 } | |
| 504 if ( SDL_vgamode[i] != NULL ) { | |
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505 SDL_free(SDL_vgamode[i]); |
| 0 | 506 SDL_vgamode[i] = NULL; |
| 507 } | |
| 508 } | |
| 509 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) { | |
| 510 /* Direct screen access, no memory buffer */ | |
| 511 this->screen->pixels = NULL; | |
| 512 } | |
| 513 } | |
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514 |