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