KernelLand/Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Kernel
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * drv/vterm.c
   6  * - Virtual Terminal - Initialisation and VFS Interface
   7  */
   8 #define DEBUG   0
   9 #include "vterm.h"
  10 #include <fs_devfs.h>
  11 #include <modules.h>
  12 #include <api_drv_keyboard.h>
  13 #include <api_drv_video.h>
  14 #include <errno.h>
  15 #include <semaphore.h>
  16
  17 // === CONSTANTS ===
  18 #define VERSION ((0<<8)|(50))
  19
  20 #define NUM_VTS 8
  21 //#define DEFAULT_OUTPUT        "BochsGA"
  22 #define DEFAULT_OUTPUT  "Vesa"
  23 #define FALLBACK_OUTPUT "x86_VGAText"
  24 #define DEFAULT_INPUT   "Keyboard"
  25 #define DEFAULT_WIDTH   640
  26 #define DEFAULT_HEIGHT  480
  27 #define DEFAULT_SCROLLBACK      4       // 2 Screens of text + current screen
  28 //#define DEFAULT_SCROLLBACK    0
  29
  30 // === TYPES ===
  31
  32 // === IMPORTS ===
  33 extern void     Debug_SetKTerminal(const char *File);
  34
  35 // === PROTOTYPES ===
  36  int    VT_Install(char **Arguments);
  37 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  38 tVFS_Node       *VT_FindDir(tVFS_Node *Node, const char *Name);
  39  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  40 size_t  VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer);
  41 size_t  VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer);
  42  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  43 void    VT_Terminal_Reference(tVFS_Node *Node);
  44 void    VT_Terminal_Close(tVFS_Node *Node);
  45 //void  VT_SetTerminal(int Term);
  46
  47 // === CONSTANTS ===
  48
  49 // === GLOBALS ===
  50 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, NULL);
  51 tVFS_NodeType   gVT_RootNodeType = {
  52         .TypeName = "VTerm Root",
  53         .ReadDir = VT_ReadDir,
  54         .FindDir = VT_FindDir,
  55         .IOCtl = VT_Root_IOCtl
  56         };
  57 tVFS_NodeType   gVT_TermNodeType = {
  58         .TypeName = "VTerm",
  59         .Read = VT_Read,
  60         .Write = VT_Write,
  61         .IOCtl = VT_Terminal_IOCtl
  62         };
  63 tDevFS_Driver   gVT_DrvInfo = {
  64         NULL, "VTerm",
  65         {
  66         .Flags = VFS_FFLAG_DIRECTORY,
  67         .Size = NUM_VTS,
  68         .Inode = -1,
  69         .NumACLs = 0,
  70         .Type = &gVT_RootNodeType
  71         }
  72 };
  73 // --- Terminals ---
  74 tVTerm  gVT_Terminals[NUM_VTS];
  75  int    giVT_CurrentTerminal = 0;
  76 tVTerm  *gpVT_CurTerm = &gVT_Terminals[0];
  77 // --- Video State ---
  78 short   giVT_RealWidth  = DEFAULT_WIDTH;        //!< Screen Width
  79 short   giVT_RealHeight = DEFAULT_HEIGHT;       //!< Screen Height
  80  int    giVT_Scrollback = DEFAULT_SCROLLBACK;
  81 // --- Driver Handles ---
  82 char    *gsVT_OutputDevice = NULL;
  83 char    *gsVT_InputDevice = NULL;
  84  int    giVT_OutputDevHandle = -2;
  85  int    giVT_InputDevHandle = -2;
  86
  87 // === CODE ===
  88 /**
  89  * \fn int VT_Install(char **Arguments)
  90  * \brief Installs the Virtual Terminal Driver
  91  */
  92 int VT_Install(char **Arguments)
  93 {
  94          int    i;
  95
  96         // Scan Arguments
  97         if(Arguments)
  98         {
  99                 char    **args;
 100                 const char      *arg;
 101                 for(args = Arguments; (arg = *args); args++ )
 102                 {
 103                         char    data[strlen(arg)+1];
 104                         char    *opt = data;
 105                         char    *val;
 106
 107                         val = strchr(arg, '=');
 108                         strcpy(data, arg);
 109                         if( val ) {
 110                                 data[ val - arg ] = '\0';
 111                                 val ++;
 112                         }
 113                         Log_Debug("VTerm", "Argument '%s'", arg);
 114
 115                         if( strcmp(opt, "Video") == 0 ) {
 116                                 if( !gsVT_OutputDevice )
 117                                         gsVT_OutputDevice = strdup(val);
 118                         }
 119                         else if( strcmp(opt, "Input") == 0 ) {
 120                                 if( !gsVT_InputDevice )
 121                                         gsVT_InputDevice = strdup(val);
 122                         }
 123                         else if( strcmp(opt, "Width") == 0 ) {
 124                                 giVT_RealWidth = atoi( val );
 125                         }
 126                         else if( strcmp(opt, "Height") == 0 ) {
 127                                 giVT_RealHeight = atoi( val );
 128                         }
 129                         else if( strcmp(opt, "Scrollback") == 0 ) {
 130                                 giVT_Scrollback = atoi( val );
 131                         }
 132                 }
 133         }
 134
 135         // Apply Defaults
 136         if(!gsVT_OutputDevice)  gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
 137         else if( Module_EnsureLoaded( gsVT_OutputDevice ) )     gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
 138         if( Module_EnsureLoaded( gsVT_OutputDevice ) )  gsVT_OutputDevice = (char*)FALLBACK_OUTPUT;
 139         if( Module_EnsureLoaded( gsVT_OutputDevice ) ) {
 140                 Log_Error("VTerm", "Fallback video '%s' is not avaliable, giving up", FALLBACK_OUTPUT);
 141                 return MODULE_ERR_MISC;
 142         }
 143
 144         if(!gsVT_InputDevice)   gsVT_InputDevice = (char*)DEFAULT_INPUT;
 145         else if( Module_EnsureLoaded( gsVT_InputDevice ) )      gsVT_InputDevice = (char*)DEFAULT_INPUT;
 146         if( Module_EnsureLoaded( gsVT_InputDevice ) ) {
 147                 Log_Error("VTerm", "Fallback input '%s' is not avaliable, input will not be avaliable", DEFAULT_INPUT);
 148         }
 149
 150         // Create device paths
 151         {
 152                 char    *tmp;
 153                 tmp = malloc( 9 + strlen(gsVT_OutputDevice) + 1 );
 154                 strcpy(tmp, "/Devices/");
 155                 strcpy(&tmp[9], gsVT_OutputDevice);
 156                 gsVT_OutputDevice = tmp;
 157
 158                 tmp = malloc( 9 + strlen(gsVT_InputDevice) + 1 );
 159                 strcpy(tmp, "/Devices/");
 160                 strcpy(&tmp[9], gsVT_InputDevice);
 161                 gsVT_InputDevice = tmp;
 162         }
 163
 164         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 165         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 166
 167         VT_InitOutput();
 168         VT_InitInput();
 169
 170
 171         // Create Nodes
 172         Log_Debug("VTerm", "Initialising nodes (and creating buffers)");
 173         for( i = 0; i < NUM_VTS; i++ )
 174         {
 175                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 176                 gVT_Terminals[i].Flags = 0;
 177 //              gVT_Terminals[i].Flags = VT_FLAG_HIDECSR;       //HACK - Stop all those memcpy calls
 178                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 179                 gVT_Terminals[i].WritePos = 0;
 180                 gVT_Terminals[i].AltWritePos = 0;
 181                 gVT_Terminals[i].ViewPos = 0;
 182                 gVT_Terminals[i].ReadingThread = -1;
 183                 gVT_Terminals[i].ScrollHeight = 0;
 184
 185                 // Initialise
 186                 VT_int_ChangeMode( &gVT_Terminals[i],
 187                         TERM_MODE_TEXT, giVT_RealWidth, giVT_RealHeight );
 188
 189                 gVT_Terminals[i].Name[0] = '0'+i;
 190                 gVT_Terminals[i].Name[1] = '\0';
 191                 gVT_Terminals[i].Node.Inode = i;
 192                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 193                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 194
 195                 gVT_Terminals[i].Node.Type = &gVT_TermNodeType;
 196 //              Semaphore_Init(&gVT_Terminals[i].InputSemaphore, 0, MAX_INPUT_CHARS8, "VTerm", gVT_Terminals[i].Name);
 197         }
 198
 199         // Add to DevFS
 200         DevFS_AddDevice( &gVT_DrvInfo );
 201
 202         // Set kernel output to VT0
 203         Log_Debug("VTerm", "Setting kernel output to VT#0");
 204         Debug_SetKTerminal("/Devices/VTerm/0");
 205
 206         return MODULE_ERR_OK;
 207 }
 208
 209 /**
 210  * \brief Set the video resolution
 211  * \param Width New screen width
 212  * \param Height        New screen height
 213  */
 214 void VT_SetResolution(int Width, int Height)
 215 {
 216         tVideo_IOCtl_Mode       mode = {0};
 217          int    tmp;
 218          int    i;
 219
 220         // Create the video mode
 221         mode.width = Width;
 222         mode.height = Height;
 223         mode.bpp = 32;
 224         mode.flags = 0;
 225
 226         // Set video mode
 227         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 228         tmp = mode.id;
 229         if( Width != mode.width || Height != mode.height )
 230         {
 231                 Log_Warning("VTerm",
 232                         "Selected resolution (%ix%i) is not supported by the device, using (%ix%i)",
 233                         giVT_RealWidth, giVT_RealHeight,
 234                         mode.width, mode.height
 235                         );
 236                 giVT_RealWidth = mode.width;
 237                 giVT_RealHeight = mode.height;
 238         }
 239         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 240
 241         // Resize text terminals if needed
 242         if( gVT_Terminals[0].Text && (giVT_RealWidth != mode.width || giVT_RealHeight != mode.height) )
 243         {
 244                  int    newBufSize = (giVT_RealWidth/giVT_CharWidth)
 245                                         *(giVT_RealHeight/giVT_CharHeight)
 246                                         *(giVT_Scrollback+1);
 247                 //tVT_Char      *tmp;
 248                 // Resize the text terminals
 249                 Log_Debug("VTerm", "Resizing terminals to %ix%i",
 250                         giVT_RealWidth/giVT_CharWidth, giVT_RealHeight/giVT_CharHeight);
 251                 for( i = 0; i < NUM_VTS; i ++ )
 252                 {
 253                         if( gVT_Terminals[i].Mode != TERM_MODE_TEXT )   continue;
 254
 255                         gVT_Terminals[i].TextWidth = giVT_RealWidth/giVT_CharWidth;
 256                         gVT_Terminals[i].TextHeight = giVT_RealHeight/giVT_CharHeight;
 257                         gVT_Terminals[i].ScrollHeight = gVT_Terminals[i].TextHeight;
 258
 259                         gVT_Terminals[i].Text = realloc(
 260                                 gVT_Terminals[i].Text,
 261                                 newBufSize*sizeof(tVT_Char)
 262                                 );
 263                 }
 264         }
 265 }
 266
 267 /**
 268  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 269  * \brief Read from the VTerm Directory
 270  */
 271 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 272 {
 273         if(Pos < 0)     return NULL;
 274         if(Pos >= NUM_VTS)      return NULL;
 275         return strdup( gVT_Terminals[Pos].Name );
 276 }
 277
 278 /**
 279  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 280  * \brief Find an item in the VTerm directory
 281  * \param Node  Root node
 282  * \param Name  Name (number) of the terminal
 283  */
 284 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 285 {
 286          int    num;
 287
 288         ENTER("pNode sName", Node, Name);
 289
 290         // Open the input and output files if needed
 291         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 292         if(giVT_InputDevHandle == -2)   VT_InitInput();
 293
 294         // Sanity check name
 295         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 296                 LEAVE('n');
 297                 return NULL;
 298         }
 299         // Get index
 300         num = Name[0] - '0';
 301         if(num >= NUM_VTS) {
 302                 LEAVE('n');
 303                 return NULL;
 304         }
 305         // Return node
 306         LEAVE('p', &gVT_Terminals[num].Node);
 307         return &gVT_Terminals[num].Node;
 308 }
 309
 310 /**
 311  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 312  * \brief Control the VTerm Driver
 313  */
 314 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 315 {
 316          int    len;
 317         switch(Id)
 318         {
 319         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 320         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 321         case DRV_IOCTL_VERSION: return VERSION;
 322         case DRV_IOCTL_LOOKUP:  return 0;
 323
 324         case 4: // Get Video Driver
 325                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 326                 return strlen(gsVT_OutputDevice);
 327
 328         case 5: // Set Video Driver
 329                 if(!Data)       return -EINVAL;
 330                 if(Threads_GetUID() != 0)       return -EACCES;
 331
 332                 len = strlen(Data);
 333
 334                 // TODO: Check if the string used is a heap string
 335
 336                 free(gsVT_OutputDevice);
 337
 338                 gsVT_OutputDevice = malloc(len+1);
 339                 strcpy(gsVT_OutputDevice, Data);
 340
 341                 VFS_Close(giVT_OutputDevHandle);
 342                 giVT_OutputDevHandle = -1;
 343
 344                 VT_InitOutput();
 345                 return 1;
 346         }
 347         return 0;
 348 }
 349
 350 /**
 351  * \brief Read from a virtual terminal
 352  */
 353 size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 354 {
 355          int    pos, avail;
 356         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 357         Uint32  *codepoint_buf = Buffer;
 358         Uint32  *codepoint_in;
 359
 360         Mutex_Acquire( &term->ReadingLock );
 361
 362         // Check current mode
 363         switch(term->Mode)
 364         {
 365         // Text Mode (UTF-8)
 366         case TERM_MODE_TEXT:
 367                 VT_int_UpdateCursor(term, 1);
 368
 369                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UTF-8)");
 370
 371                 avail = term->InputWrite - term->InputRead;
 372                 if(avail < 0)
 373                         avail += MAX_INPUT_CHARS8;
 374                 if(avail > Length)
 375                         avail = Length;
 376
 377                 pos = 0;
 378                 while( avail -- )
 379                 {
 380                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 381                         pos ++;
 382                         term->InputRead ++;
 383                         while(term->InputRead >= MAX_INPUT_CHARS8)
 384                                 term->InputRead -= MAX_INPUT_CHARS8;
 385                 }
 386                 break;
 387
 388         //case TERM_MODE_FB:
 389         // Other - UCS-4
 390         default:
 391                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UCS-4)");
 392
 393                 avail = term->InputWrite - term->InputRead;
 394                 if(avail < 0)
 395                         avail += MAX_INPUT_CHARS32;
 396                 Length /= 4;
 397                 if(avail > Length)
 398                         avail = Length;
 399
 400                 codepoint_in = (void*)term->InputBuffer;
 401                 codepoint_buf = Buffer;
 402
 403                 pos = 0;
 404                 while( avail -- )
 405                 {
 406                         codepoint_buf[pos] = codepoint_in[term->InputRead];
 407                         pos ++;
 408                         term->InputRead ++;
 409                         while(term->InputRead >= MAX_INPUT_CHARS32)
 410                                 term->InputRead -= MAX_INPUT_CHARS32;
 411                 }
 412                 pos *= 4;
 413                 break;
 414         }
 415
 416         // Mark none avaliable if buffer empty
 417         if( term->InputRead == term->InputWrite )
 418                 VFS_MarkAvaliable(&term->Node, 0);
 419
 420         term->ReadingThread = -1;
 421
 422 //      VT_int_UpdateCursor(term, term->Mode == TERM_MODE_TEXT);
 423
 424         Mutex_Release( &term->ReadingLock );
 425
 426         return pos;
 427 }
 428
 429 /**
 430  * \brief Write to a virtual terminal
 431  */
 432 size_t VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer)
 433 {
 434         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 435          int    size;
 436
 437         // Write
 438         switch( term->Mode )
 439         {
 440         // Print Text
 441         case TERM_MODE_TEXT:
 442                 VT_int_PutString(term, Buffer, Length);
 443                 break;
 444
 445         // Framebuffer :)
 446         case TERM_MODE_FB:
 447                 // - Sanity Checking
 448                 size = term->Width*term->Height*4;
 449                 if( Offset > size ) {
 450                         Log_Notice("VTerm", "VT_Write: Offset (0x%llx) > FBSize (0x%x)",
 451                                 Offset, size);
 452                         return 0;
 453                 }
 454                 if( Offset + Length > size ) {
 455                         Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
 456                                 Offset+Length, size);
 457                         Length = size - Offset;
 458                 }
 459
 460                 // Update screen if needed
 461                 if( Node->Inode == giVT_CurrentTerminal )
 462                 {
 463                         if( giVT_RealHeight > term->Height )
 464                                 Offset += (giVT_RealHeight - term->Height) / 2 * term->Width * 4;
 465                         // Handle undersized virtual terminals
 466                         if( giVT_RealWidth > term->Width )
 467                         {
 468                                 // No? :( Well, just center it
 469                                  int    x, y, w, h;
 470                                 Uint    dst_ofs;
 471                                 // TODO: Fix to handle the final line correctly?
 472                                 x = Offset/4;   y = x / term->Width;    x %= term->Width;
 473                                 w = Length/4+x; h = w / term->Width;    w %= term->Width;
 474
 475                                 // Center
 476                                 x += (giVT_RealWidth - term->Width) / 2;
 477                                 dst_ofs = (x + y * giVT_RealWidth) * 4;
 478                                 while(h--)
 479                                 {
 480                                         VFS_WriteAt( giVT_OutputDevHandle,
 481                                                 dst_ofs,
 482                                                 term->Width * 4,
 483                                                 Buffer
 484                                                 );
 485                                         Buffer = (void*)( (Uint)Buffer + term->Width*4 );
 486                                         dst_ofs += giVT_RealWidth * 4;
 487                                 }
 488                                 return 0;
 489                         }
 490                         else
 491                         {
 492                                 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 493                         }
 494                 }
 495                 else
 496                 {
 497                         if( !term->Buffer )
 498                                 term->Buffer = malloc( term->Width * term->Height * 4 );
 499                         // Copy to the local cache
 500                         memcpy( (char*)term->Buffer + (Uint)Offset, Buffer, Length );
 501                 }
 502                 break;
 503         // Just pass on (for now)
 504         // TODO: Handle locally too to ensure no information is lost on
 505         //       VT Switch (and to isolate terminals from each other)
 506         case TERM_MODE_2DACCEL:
 507         //case TERM_MODE_3DACCEL:
 508                 if( Node->Inode == giVT_CurrentTerminal )
 509                 {
 510                         VFS_Write( giVT_OutputDevHandle, Length, Buffer );
 511                 }
 512                 break;
 513         }
 514
 515         return 0;
 516 }
 517
 518 /**
 519  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 520  * \brief Call an IO Control on a virtual terminal
 521  */
 522 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 523 {
 524          int    *iData = Data;
 525          int    ret;
 526         tVTerm  *term = Node->ImplPtr;
 527         ENTER("pNode iId pData", Node, Id, Data);
 528
 529         if(Id >= DRV_IOCTL_LOOKUP) {
 530                 // Only root can fiddle with graphics modes
 531                 // TODO: Remove this and replace with user ownership
 532                 if( Threads_GetUID() != 0 )     return -1;
 533         }
 534
 535         switch(Id)
 536         {
 537         // --- Core Defined
 538         case DRV_IOCTL_TYPE:
 539                 LEAVE('i', DRV_TYPE_TERMINAL);
 540                 return DRV_TYPE_TERMINAL;
 541         case DRV_IOCTL_IDENT:
 542                 memcpy(Data, "VT\0\0", 4);
 543                 LEAVE('i', 0);
 544                 return 0;
 545         case DRV_IOCTL_VERSION:
 546                 LEAVE('x', VERSION);
 547                 return VERSION;
 548         case DRV_IOCTL_LOOKUP:
 549                 LEAVE('i', 0);
 550                 return 0;
 551
 552         // Get/Set the mode (and apply any changes)
 553         case TERM_IOCTL_MODETYPE:
 554                 if(Data != NULL)
 555                 {
 556                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 557                                 LEAVE('i', -1);
 558                                 return -1;
 559                         }
 560                         Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
 561
 562                         // Update mode if needed
 563                         if( term->Mode != *iData || term->NewWidth || term->NewHeight)
 564                         {
 565                                 // Adjust for text mode
 566                                 if( *iData == TERM_MODE_TEXT ) {
 567                                         term->NewHeight *= giVT_CharHeight;
 568                                         term->NewWidth *= giVT_CharWidth;
 569                                 }
 570                                 // Fill unchanged dimensions
 571                                 if(term->NewHeight == 0)        term->NewHeight = term->Height;
 572                                 if(term->NewWidth == 0) term->NewWidth = term->Width;
 573                                 // Set new mode
 574                                 VT_int_ChangeMode(term, *iData, term->NewWidth, term->NewHeight);
 575                                 // Clear unapplied dimensions
 576                                 term->NewWidth = 0;
 577                                 term->NewHeight = 0;
 578                         }
 579
 580                         // Update the screen dimensions
 581                         if(Node->Inode == giVT_CurrentTerminal)
 582                                 VT_SetTerminal( giVT_CurrentTerminal );
 583                 }
 584                 LEAVE('i', term->Mode);
 585                 return term->Mode;
 586
 587         // Get/set the terminal width
 588         case TERM_IOCTL_WIDTH:
 589                 if(Data != NULL) {
 590                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 591                                 LEAVE('i', -1);
 592                                 return -1;
 593                         }
 594                         term->NewWidth = *iData;
 595                 }
 596                 if( term->NewWidth )
 597                         ret = term->NewWidth;
 598                 else if( term->Mode == TERM_MODE_TEXT )
 599                         ret = term->TextWidth;
 600                 else
 601                         ret = term->Width;
 602                 LEAVE('i', ret);
 603                 return ret;
 604
 605         // Get/set the terminal height
 606         case TERM_IOCTL_HEIGHT:
 607                 if(Data != NULL) {
 608                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 609                                 LEAVE('i', -1);
 610                                 return -1;
 611                         }
 612                         term->NewHeight = *iData;
 613                 }
 614                 if( term->NewHeight )
 615                         ret = term->NewHeight;
 616                 else if( term->Mode == TERM_MODE_TEXT )
 617                         ret = term->TextHeight;
 618                 else
 619                         ret = term->Height;
 620                 LEAVE('i', ret);
 621                 return ret;
 622
 623         case TERM_IOCTL_FORCESHOW:
 624                 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
 625                         Threads_GetTID(), (int)Node->Inode);
 626                 VT_SetTerminal( Node->Inode );
 627                 LEAVE('i', 1);
 628                 return 1;
 629
 630         case TERM_IOCTL_GETSETCURSOR:
 631                 if(Data != NULL)
 632                 {
 633                         tVideo_IOCtl_Pos        *pos = Data;
 634                         if( !CheckMem(Data, sizeof(*pos)) ) {
 635                                 errno = -EINVAL;
 636                                 LEAVE('i', -1);
 637                                 return -1;
 638                         }
 639
 640                         if( term->Mode == TERM_MODE_TEXT )
 641                         {
 642                                 if(term->Flags & VT_FLAG_ALTBUF)
 643                                         term->AltWritePos = pos->x + pos->y * term->TextWidth;
 644                                 else
 645                                         term->WritePos = pos->x + pos->y * term->TextWidth + term->ViewPos;
 646                                 VT_int_UpdateCursor(term, 0);
 647                         }
 648                         else
 649                         {
 650                                 term->VideoCursorX = pos->x;
 651                                 term->VideoCursorY = pos->y;
 652                                 VT_int_UpdateCursor(term, 1);
 653                         }
 654                 }
 655                 ret = (term->Flags & VT_FLAG_ALTBUF) ? term->AltWritePos : term->WritePos-term->ViewPos;
 656                 LEAVE('i', ret);
 657                 return ret;
 658
 659         case TERM_IOCTL_SETCURSORBITMAP: {
 660                 tVideo_IOCtl_Bitmap     *bmp = Data;
 661                 if( Data == NULL )
 662                 {
 663                         free( term->VideoCursor );
 664                         term->VideoCursor = NULL;
 665                         LEAVE('i', 0);
 666                         return 0;
 667                 }
 668
 669                 // Sanity check bitmap
 670                 if( !CheckMem(bmp, sizeof(tVideo_IOCtl_Bitmap)) ) {
 671                         Log_Notice("VTerm", "%p in TERM_IOCTL_SETCURSORBITMAP invalid", bmp);
 672                         errno = -EINVAL;
 673                         LEAVE_RET('i', -1);
 674                 }
 675                 if( !CheckMem(bmp->Data, bmp->W*bmp->H*sizeof(Uint32)) ) {
 676                         Log_Notice("VTerm", "%p in TERM_IOCTL_SETCURSORBITMAP invalid", bmp);
 677                         errno = -EINVAL;
 678                         LEAVE_RET('i', -1);
 679                 }
 680
 681                 // Reallocate if needed
 682                 if(term->VideoCursor)
 683                 {
 684                         if(bmp->W * bmp->H != term->VideoCursor->W * term->VideoCursor->H) {
 685                                 free(term->VideoCursor);
 686                                 term->VideoCursor = NULL;
 687                         }
 688                 }
 689                 if(!term->VideoCursor) {
 690                         term->VideoCursor = malloc(sizeof(tVideo_IOCtl_Pos) + bmp->W*bmp->H*sizeof(Uint32));
 691                         if(!term->VideoCursor) {
 692                                 Log_Error("VTerm", "Unable to allocate memory for cursor");
 693                                 errno = -ENOMEM;
 694                                 LEAVE_RET('i', -1);
 695                         }
 696                 }
 697
 698                 memcpy(term->VideoCursor, bmp, sizeof(tVideo_IOCtl_Pos) + bmp->W*bmp->H*sizeof(Uint32));
 699
 700                 Log_Debug("VTerm", "Set VT%i's cursor to %p %ix%i",
 701                         (int)term->Node.Inode, bmp, bmp->W, bmp->H);
 702
 703                 if(gpVT_CurTerm == term)
 704                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSORBITMAP, term->VideoCursor);
 705
 706                 LEAVE('i', 0);
 707                 return 0; }
 708         }
 709         LEAVE('i', -1);
 710         return -1;
 711 }
 712
 713 void VT_Terminal_Reference(tVFS_Node *Node)
 714 {
 715         // Append PID to list
 716 }
 717
 718 void VT_Terminal_Close(tVFS_Node *Node)
 719 {
 720         // Remove PID from list
 721 }
 722
 723 /**
 724  * \fn void VT_SetTerminal(int ID)
 725  * \brief Set the current terminal
 726  */
 727 void VT_SetTerminal(int ID)
 728 {
 729         // Copy the screen state
 730         if( ID != giVT_CurrentTerminal && gpVT_CurTerm->Mode != TERM_MODE_TEXT )
 731         {
 732                 if( !gpVT_CurTerm->Buffer )
 733                         gpVT_CurTerm->Buffer = malloc( gpVT_CurTerm->Width*gpVT_CurTerm->Height*4 );
 734                 if( gpVT_CurTerm->Width < giVT_RealWidth )
 735                 {
 736                          int    line;
 737                         Uint    ofs = 0;
 738                         Uint32  *dest = gpVT_CurTerm->Buffer;
 739                         // Slower scanline copy
 740                         for( line = 0; line < gpVT_CurTerm->Height; line ++ )
 741                         {
 742                                 VFS_ReadAt(giVT_OutputDevHandle, ofs, gpVT_CurTerm->Width*4, dest);
 743                                 ofs += giVT_RealWidth * 4;
 744                                 dest += gpVT_CurTerm->Width;
 745                         }
 746                 }
 747                 else
 748                 {
 749                         VFS_ReadAt(giVT_OutputDevHandle,
 750                                 0, gpVT_CurTerm->Height*giVT_RealWidth*4,
 751                                 gpVT_CurTerm->Buffer
 752                                 );
 753                 }
 754         }
 755
 756         // Update current terminal ID
 757         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 758         giVT_CurrentTerminal = ID;
 759         gpVT_CurTerm = &gVT_Terminals[ID];
 760
 761         LOG("Attempting VT_SetMode");
 762
 763         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 764         {
 765                 VT_SetMode( VIDEO_BUFFMT_TEXT );
 766         }
 767         else
 768         {
 769                 // Update the cursor image
 770                 if(gpVT_CurTerm->VideoCursor)
 771                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSORBITMAP, gpVT_CurTerm->VideoCursor);
 772                 VT_SetMode( VIDEO_BUFFMT_FRAMEBUFFER );
 773         }
 774
 775         LOG("Mode set");
 776
 777         if(gpVT_CurTerm->Buffer)
 778         {
 779                 // TODO: Handle non equal sized
 780                 VFS_WriteAt(
 781                         giVT_OutputDevHandle,
 782                         0,
 783                         gpVT_CurTerm->Width*gpVT_CurTerm->Height*sizeof(Uint32),
 784                         gpVT_CurTerm->Buffer
 785                         );
 786                 LOG("Updated screen contents");
 787         }
 788
 789         VT_int_UpdateCursor(gpVT_CurTerm, 1);
 790         // Update the screen
 791         VT_int_UpdateScreen(gpVT_CurTerm, 1);
 792         LOG("done");
 793 }