Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #define DEBUG   0
   5 #include <acess.h>
   6 #include <fs_devfs.h>
   7 #include <modules.h>
   8 #include <tpl_drv_video.h>
   9 #include <tpl_drv_keyboard.h>
  10 #include <tpl_drv_terminal.h>
  11 #include <errno.h>
  12 #include <semaphore.h>
  13
  14 #define USE_CTRL_ALT    0
  15
  16 // === CONSTANTS ===
  17 #define VERSION ((0<<8)|(50))
  18
  19 #define NUM_VTS 8
  20 #define MAX_INPUT_CHARS32       64
  21 #define MAX_INPUT_CHARS8        (MAX_INPUT_CHARS32*4)
  22 //#define DEFAULT_OUTPUT        "BochsGA"
  23 #define DEFAULT_OUTPUT  "Vesa"
  24 #define DEFAULT_INPUT   "PS2Keyboard"
  25 #define DEFAULT_WIDTH   640
  26 #define DEFAULT_HEIGHT  480
  27 #define DEFAULT_SCROLLBACK      2       // 2 Screens of text + current screen
  28 #define DEFAULT_COLOUR  (VT_COL_BLACK|(0xAAA<<16))
  29
  30 #define VT_FLAG_HIDECSR 0x01
  31 #define VT_FLAG_HASFB   0x10    //!< Set if the VTerm has requested the Framebuffer
  32
  33 enum eVT_InModes {
  34         VT_INMODE_TEXT8,        // UTF-8 Text Mode (VT100/xterm Emulation)
  35         VT_INMODE_TEXT32,       // UTF-32 Text Mode (Acess Native)
  36         NUM_VT_INMODES
  37 };
  38
  39 // === TYPES ===
  40 typedef struct {
  41          int    Mode;   //!< Current Mode (see ::eTplTerminal_Modes)
  42          int    Flags;  //!< Flags (see VT_FLAG_*)
  43
  44         short   NewWidth;       //!< Un-applied dimensions (Width)
  45         short   NewHeight;      //!< Un-applied dimensions (Height)
  46         short   Width;  //!< Virtual Width
  47         short   Height; //!< Virtual Height
  48         short   TextWidth;      //!< Text Virtual Width
  49         short   TextHeight;     //!< Text Virtual Height
  50
  51          int    ViewPos;        //!< View Buffer Offset (Text Only)
  52          int    WritePos;       //!< Write Buffer Offset (Text Only)
  53         Uint32  CurColour;      //!< Current Text Colour
  54
  55         tMutex  ReadingLock;    //!< Lock the VTerm when a process is reading from it
  56         tTID    ReadingThread;  //!< Owner of the lock
  57          int    InputRead;      //!< Input buffer read position
  58          int    InputWrite;     //!< Input buffer write position
  59         char    InputBuffer[MAX_INPUT_CHARS8];
  60         tSemaphore      InputSemaphore;
  61
  62         tVT_Char        *Text;
  63         Uint32          *Buffer;
  64
  65         char    Name[2];        //!< Name of the terminal
  66         tVFS_Node       Node;
  67 } tVTerm;
  68
  69 // === IMPORTS ===
  70 extern void     Debug_SetKTerminal(const char *File);
  71
  72 // === PROTOTYPES ===
  73  int    VT_Install(char **Arguments);
  74 void    VT_InitOutput(void);
  75 void    VT_InitInput(void);
  76 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  77 tVFS_Node       *VT_FindDir(tVFS_Node *Node, const char *Name);
  78  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  79 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  80 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  81  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  82 void    VT_SetResolution(int Width, int Height);
  83 void    VT_SetMode(int Mode);
  84 void    VT_SetTerminal(int ID);
  85 void    VT_KBCallBack(Uint32 Codepoint);
  86 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  87 void    VT_int_ClearLine(tVTerm *Term, int Num);
  88  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  89 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  90 void    VT_int_ScrollFramebuffer( tVTerm *Term );
  91 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  92 void    VT_int_ChangeMode(tVTerm *Term, int NewMode, int NewWidth, int NewHeight);
  93
  94 // === CONSTANTS ===
  95 const Uint16    caVT100Colours[] = {
  96                 // Black, Red, Green, Yellow, Blue, Purple, Cyan, Gray
  97                 // Same again, but bright
  98                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  99                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
 100         };
 101
 102 // === GLOBALS ===
 103 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
 104 tDevFS_Driver   gVT_DrvInfo = {
 105         NULL, "VTerm",
 106         {
 107         .Flags = VFS_FFLAG_DIRECTORY,
 108         .Size = NUM_VTS,
 109         .Inode = -1,
 110         .NumACLs = 0,
 111         .ReadDir = VT_ReadDir,
 112         .FindDir = VT_FindDir,
 113         .IOCtl = VT_Root_IOCtl
 114         }
 115 };
 116 // --- Terminals ---
 117 tVTerm  gVT_Terminals[NUM_VTS];
 118  int    giVT_CurrentTerminal = 0;
 119 tVTerm  *gpVT_CurTerm = &gVT_Terminals[0];
 120 // --- Video State ---
 121 short   giVT_RealWidth  = DEFAULT_WIDTH;        //!< Screen Width
 122 short   giVT_RealHeight = DEFAULT_HEIGHT;       //!< Screen Height
 123  int    giVT_Scrollback = DEFAULT_SCROLLBACK;
 124 // --- Driver Handles ---
 125 char    *gsVT_OutputDevice = NULL;
 126 char    *gsVT_InputDevice = NULL;
 127  int    giVT_OutputDevHandle = -2;
 128  int    giVT_InputDevHandle = -2;
 129 // --- Key States --- (Used for VT Switching/Magic Combos)
 130  int    gbVT_CtrlDown = 0;
 131  int    gbVT_AltDown = 0;
 132  int    gbVT_SysrqDown = 0;
 133
 134 // === CODE ===
 135 /**
 136  * \fn int VT_Install(char **Arguments)
 137  * \brief Installs the Virtual Terminal Driver
 138  */
 139 int VT_Install(char **Arguments)
 140 {
 141          int    i;
 142
 143         // Scan Arguments
 144         if(Arguments)
 145         {
 146                 char    **args;
 147                 const char      *arg;
 148                 for(args = Arguments; (arg = *args); args++ )
 149                 {
 150                         char    data[strlen(arg)+1];
 151                         char    *opt = data;
 152                         char    *val;
 153
 154                         val = strchr(arg, '=');
 155                         strcpy(data, arg);
 156                         if( val ) {
 157                                 data[ val - arg ] = '\0';
 158                                 val ++;
 159                         }
 160                         Log_Debug("VTerm", "Argument '%s'", arg);
 161
 162                         if( strcmp(opt, "Video") == 0 ) {
 163                                 gsVT_OutputDevice = strdup(val);
 164                         }
 165                         else if( strcmp(opt, "Input") == 0 ) {
 166                                 gsVT_InputDevice = strdup(val);
 167                         }
 168                         else if( strcmp(opt, "Width") == 0 ) {
 169                                 giVT_RealWidth = atoi( val );
 170                         }
 171                         else if( strcmp(opt, "Height") == 0 ) {
 172                                 giVT_RealHeight = atoi( val );
 173                         }
 174                         else if( strcmp(opt, "Scrollback") == 0 ) {
 175                                 giVT_Scrollback = atoi( val );
 176                         }
 177                 }
 178         }
 179
 180         if(gsVT_OutputDevice)   Modules_InitialiseBuiltin( gsVT_OutputDevice );
 181         if(gsVT_InputDevice)    Modules_InitialiseBuiltin( gsVT_InputDevice );
 182
 183         // Apply Defaults
 184         if(!gsVT_OutputDevice)  gsVT_OutputDevice = strdup(DEFAULT_OUTPUT);
 185         if(!gsVT_InputDevice)   gsVT_InputDevice = strdup(DEFAULT_INPUT);
 186
 187         // Create paths
 188         {
 189                 char    *tmp;
 190                 tmp = malloc( 9 + strlen(gsVT_OutputDevice) + 1 );
 191                 strcpy(tmp, "/Devices/");
 192                 strcpy(&tmp[9], gsVT_OutputDevice);
 193                 gsVT_OutputDevice = tmp;
 194                 tmp = malloc( 9 + strlen(gsVT_InputDevice) + 1 );
 195                 strcpy(tmp, "/Devices/");
 196                 strcpy(&tmp[9], gsVT_InputDevice);
 197                 gsVT_InputDevice = tmp;
 198         }
 199
 200         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 201         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 202
 203         // Create Nodes
 204         for( i = 0; i < NUM_VTS; i++ )
 205         {
 206                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 207                 gVT_Terminals[i].Flags = 0;
 208                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 209                 gVT_Terminals[i].WritePos = 0;
 210                 gVT_Terminals[i].ViewPos = 0;
 211                 gVT_Terminals[i].ReadingThread = -1;
 212
 213                 // Initialise
 214                 VT_int_ChangeMode( &gVT_Terminals[i],
 215                         TERM_MODE_TEXT, giVT_RealWidth, giVT_RealHeight );
 216
 217                 gVT_Terminals[i].Name[0] = '0'+i;
 218                 gVT_Terminals[i].Name[1] = '\0';
 219                 gVT_Terminals[i].Node.Inode = i;
 220                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 221                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 222
 223                 gVT_Terminals[i].Node.Read = VT_Read;
 224                 gVT_Terminals[i].Node.Write = VT_Write;
 225                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 226                 Semaphore_Init(&gVT_Terminals[i].InputSemaphore, 0, MAX_INPUT_CHARS8, "VTerm", gVT_Terminals[i].Name);
 227         }
 228
 229         // Add to DevFS
 230         DevFS_AddDevice( &gVT_DrvInfo );
 231
 232         VT_InitOutput();
 233         VT_InitInput();
 234
 235         // Set kernel output to VT0
 236         Debug_SetKTerminal("/Devices/VTerm/0");
 237
 238         Log_Log("VTerm", "Returning %i", MODULE_ERR_OK);
 239         return MODULE_ERR_OK;
 240 }
 241
 242 /**
 243  * \fn void VT_InitOutput()
 244  * \brief Initialise Video Output
 245  */
 246 void VT_InitOutput()
 247 {
 248         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 249         if(giVT_OutputDevHandle == -1) {
 250                 Log_Warning("VTerm", "Oh F**k, I can't open the video device '%s'", gsVT_OutputDevice);
 251                 return ;
 252         }
 253         VT_SetResolution( giVT_RealWidth, giVT_RealHeight );
 254         VT_SetTerminal( 0 );
 255         VT_SetMode( VIDEO_BUFFMT_TEXT );
 256 }
 257
 258 /**
 259  * \fn void VT_InitInput()
 260  * \brief Initialises the input
 261  */
 262 void VT_InitInput()
 263 {
 264         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 265         if(giVT_InputDevHandle == -1) {
 266                 Log_Warning("VTerm", "Can't open the input device '%s'", gsVT_InputDevice);
 267                 return ;
 268         }
 269         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 270 }
 271
 272 /**
 273  * \brief Set the video resolution
 274  * \param Width New screen width
 275  * \param Height        New screen height
 276  */
 277 void VT_SetResolution(int Width, int Height)
 278 {
 279         tVideo_IOCtl_Mode       mode = {0};
 280          int    tmp;
 281          int    i;
 282
 283         // Create the video mode
 284         mode.width = Width;
 285         mode.height = Height;
 286         mode.bpp = 32;
 287         mode.flags = 0;
 288
 289         // Set video mode
 290         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 291         tmp = mode.id;
 292         if( Width != mode.width || Height != mode.height )
 293         {
 294                 Log_Warning("VTerm",
 295                         "Selected resolution (%ix%i is not supported) by the device, using (%ix%i)",
 296                         giVT_RealWidth, giVT_RealHeight,
 297                         mode.width, mode.height
 298                         );
 299         }
 300         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 301
 302         // Resize text terminals if needed
 303         if( giVT_RealWidth != mode.width || giVT_RealHeight != mode.height )
 304         {
 305                  int    newBufSize = (giVT_RealWidth/giVT_CharWidth)
 306                                         *(giVT_RealHeight/giVT_CharHeight)
 307                                         *(giVT_Scrollback+1);
 308                 //tVT_Char      *tmp;
 309                 // Resize the text terminals
 310                 giVT_RealWidth = mode.width;
 311                 giVT_RealHeight = mode.height;
 312                 for( i = 0; i < NUM_VTS; i ++ )
 313                 {
 314                         if( gVT_Terminals[i].Mode != TERM_MODE_TEXT )   continue;
 315
 316                         gVT_Terminals[i].Text = realloc(
 317                                 gVT_Terminals[i].Text,
 318                                 newBufSize*sizeof(tVT_Char)
 319                                 );
 320                 }
 321         }
 322 }
 323
 324 /**
 325  * \brief Set video output buffer mode
 326  */
 327 void VT_SetMode(int Mode)
 328 {
 329         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &Mode );
 330 }
 331
 332 /**
 333  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 334  * \brief Read from the VTerm Directory
 335  */
 336 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 337 {
 338         if(Pos < 0)     return NULL;
 339         if(Pos >= NUM_VTS)      return NULL;
 340         return strdup( gVT_Terminals[Pos].Name );
 341 }
 342
 343 /**
 344  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 345  * \brief Find an item in the VTerm directory
 346  * \param Node  Root node
 347  * \param Name  Name (number) of the terminal
 348  */
 349 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 350 {
 351          int    num;
 352
 353         ENTER("pNode sName", Node, Name);
 354
 355         // Open the input and output files if needed
 356         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 357         if(giVT_InputDevHandle == -2)   VT_InitInput();
 358
 359         // Sanity check name
 360         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 361                 LEAVE('n');
 362                 return NULL;
 363         }
 364         // Get index
 365         num = Name[0] - '0';
 366         if(num >= NUM_VTS) {
 367                 LEAVE('n');
 368                 return NULL;
 369         }
 370         // Return node
 371         LEAVE('p', &gVT_Terminals[num].Node);
 372         return &gVT_Terminals[num].Node;
 373 }
 374
 375 /**
 376  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 377  * \brief Control the VTerm Driver
 378  */
 379 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 380 {
 381          int    len;
 382         switch(Id)
 383         {
 384         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 385         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 386         case DRV_IOCTL_VERSION: return VERSION;
 387         case DRV_IOCTL_LOOKUP:  return 0;
 388
 389         case 4: // Get Video Driver
 390                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 391                 return strlen(gsVT_OutputDevice);
 392
 393         case 5: // Set Video Driver
 394                 if(!Data)       return -EINVAL;
 395                 if(Threads_GetUID() != 0)       return -EACCES;
 396
 397                 len = strlen(Data);
 398
 399                 // TODO: Check if the string used is a heap string
 400
 401                 free(gsVT_OutputDevice);
 402
 403                 gsVT_OutputDevice = malloc(len+1);
 404                 strcpy(gsVT_OutputDevice, Data);
 405
 406                 VFS_Close(giVT_OutputDevHandle);
 407                 giVT_OutputDevHandle = -1;
 408
 409                 VT_InitOutput();
 410                 return 1;
 411         }
 412         return 0;
 413 }
 414
 415 /**
 416  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 417  * \brief Read from a virtual terminal
 418  */
 419 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 420 {
 421          int    pos = 0;
 422         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 423
 424         Mutex_Acquire( &term->ReadingLock );
 425
 426         // Check current mode
 427         switch(term->Mode)
 428         {
 429         // Text Mode (UTF-8)
 430         case TERM_MODE_TEXT:
 431                 while(pos < Length)
 432                 {
 433                         int avail_bytes;
 434                         VFS_SelectNode(Node, VFS_SELECT_READ, NULL);
 435                         avail_bytes = term->InputRead - term->InputWrite;
 436
 437                         if(avail_bytes < 0)
 438                                 avail_bytes += MAX_INPUT_CHARS8;
 439                         if(avail_bytes > Length - pos)
 440                                 avail_bytes = Length - pos;
 441
 442                         while( avail_bytes -- )
 443                         {
 444                                 ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 445                                 pos ++;
 446                                 term->InputRead ++;
 447                                 term->InputRead %= MAX_INPUT_CHARS8;
 448                         }
 449                 }
 450                 break;
 451
 452         //case TERM_MODE_FB:
 453         // Other - UCS-4
 454         default:
 455                 while(pos < Length)
 456                 {
 457                          int avail;
 458                         VFS_SelectNode(Node, VFS_SELECT_READ, NULL);
 459
 460                         avail = term->InputRead - term->InputWrite;
 461                         if(avail < 0)
 462                                 avail += MAX_INPUT_CHARS32;
 463                         if(avail > Length - pos)
 464                                 avail = Length/4 - pos;
 465
 466
 467                         while( avail -- )
 468                         {
 469                                 ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 470                                 pos ++;
 471                                 term->InputRead ++;
 472                                 term->InputRead %= MAX_INPUT_CHARS32;
 473                         }
 474                 }
 475                 pos *= 4;
 476                 break;
 477         }
 478
 479         // Mark none avaliable if buffer empty
 480         if( term->InputRead == term->InputWrite )
 481                 VFS_MarkAvaliable(&term->Node, 0);
 482
 483         term->ReadingThread = -1;
 484
 485         Mutex_Release( &term->ReadingLock );
 486
 487         return pos;
 488 }
 489
 490 /**
 491  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 492  * \brief Write to a virtual terminal
 493  */
 494 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 495 {
 496         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 497          int    size;
 498
 499         // Write
 500         switch( term->Mode )
 501         {
 502         // Print Text
 503         case TERM_MODE_TEXT:
 504                 VT_int_PutString(term, Buffer, Length);
 505                 break;
 506         // Framebuffer :)
 507         case TERM_MODE_FB:
 508
 509                 // - Sanity Checking
 510                 size = term->Width*term->Height*4;
 511                 if( Offset > size ) {
 512                         Log_Notice("VTerm", "VT_Write: Offset (0x%llx) > FBSize (0x%x)",
 513                                 Offset, size);
 514                         return 0;
 515                 }
 516                 if( Offset + Length > size ) {
 517                         Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
 518                                 Offset+Length, size);
 519                         Length = size - Offset;
 520                 }
 521
 522                 // Copy to the local cache
 523                 memcpy( (void*)((Uint)term->Buffer + (Uint)Offset), Buffer, Length );
 524
 525                 // Update screen if needed
 526                 if( Node->Inode == giVT_CurrentTerminal )
 527                 {
 528                         // Fill entire screen?
 529                         if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
 530                         {
 531                                 // No? :( Well, just center it
 532                                  int    x, y, w, h;
 533                                 x = Offset/4;   y = x / term->Width;    x %= term->Width;
 534                                 w = Length/4+x; h = w / term->Width;    w %= term->Width;
 535                                 // Center
 536                                 x += (giVT_RealWidth - term->Width) / 2;
 537                                 y += (giVT_RealHeight - term->Height) / 2;
 538                                 while(h--)
 539                                 {
 540                                         VFS_WriteAt( giVT_OutputDevHandle,
 541                                                 (x + y * giVT_RealWidth)*4,
 542                                                 term->Width * 4,
 543                                                 Buffer
 544                                                 );
 545                                         Buffer = (void*)( (Uint)Buffer + term->Width*4 );
 546                                         y ++;
 547                                 }
 548                                 return 0;
 549                         }
 550                         else {
 551                                 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 552                         }
 553                 }
 554         // Just pass on (for now)
 555         // TODO: Handle locally too to ensure no information is lost on
 556         //       VT Switch (and to isolate terminals from each other)
 557         case TERM_MODE_2DACCEL:
 558         //case TERM_MODE_3DACCEL:
 559                 if( Node->Inode == giVT_CurrentTerminal )
 560                 {
 561                         VFS_Write( giVT_OutputDevHandle, Length, Buffer );
 562                 }
 563                 break;
 564         }
 565
 566         return 0;
 567 }
 568
 569 /**
 570  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 571  * \brief Call an IO Control on a virtual terminal
 572  */
 573 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 574 {
 575          int    *iData = Data;
 576          int    ret;
 577         tVTerm  *term = Node->ImplPtr;
 578         ENTER("pNode iId pData", Node, Id, Data);
 579
 580         if(Id >= DRV_IOCTL_LOOKUP) {
 581                 // Only root can fiddle with graphics modes
 582                 // TODO: Remove this and replace with user ownership
 583                 if( Threads_GetUID() != 0 )     return -1;
 584         }
 585
 586         switch(Id)
 587         {
 588         // --- Core Defined
 589         case DRV_IOCTL_TYPE:
 590                 LEAVE('i', DRV_TYPE_TERMINAL);
 591                 return DRV_TYPE_TERMINAL;
 592         case DRV_IOCTL_IDENT:
 593                 memcpy(Data, "VT\0\0", 4);
 594                 LEAVE('i', 0);
 595                 return 0;
 596         case DRV_IOCTL_VERSION:
 597                 LEAVE('x', VERSION);
 598                 return VERSION;
 599         case DRV_IOCTL_LOOKUP:
 600                 LEAVE('i', 0);
 601                 return 0;
 602
 603         // Get/Set the mode (and apply any changes)
 604         case TERM_IOCTL_MODETYPE:
 605                 if(Data != NULL)
 606                 {
 607                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 608                                 LEAVE('i', -1);
 609                                 return -1;
 610                         }
 611                         Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
 612
 613                         // Update mode if needed
 614                         if( term->Mode != *iData
 615                          || term->NewWidth
 616                          || term->NewHeight)
 617                         {
 618                                 // Adjust for text mode
 619                                 if( *iData == TERM_MODE_TEXT ) {
 620                                         term->NewHeight *= giVT_CharHeight;
 621                                         term->NewWidth *= giVT_CharWidth;
 622                                 }
 623                                 // Fill unchanged dimensions
 624                                 if(term->NewHeight == 0)        term->NewHeight = term->Height;
 625                                 if(term->NewWidth == 0) term->NewWidth = term->Width;
 626                                 // Set new mode
 627                                 VT_int_ChangeMode(term, *iData, term->NewWidth, term->NewHeight);
 628                                 // Clear unapplied dimensions
 629                                 term->NewWidth = 0;
 630                                 term->NewHeight = 0;
 631                         }
 632
 633                         // Update the screen dimensions
 634                         if(Node->Inode == giVT_CurrentTerminal)
 635                                 VT_SetTerminal( giVT_CurrentTerminal );
 636                 }
 637                 LEAVE('i', term->Mode);
 638                 return term->Mode;
 639
 640         // Get/set the terminal width
 641         case TERM_IOCTL_WIDTH:
 642                 if(Data != NULL) {
 643                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 644                                 LEAVE('i', -1);
 645                                 return -1;
 646                         }
 647                         term->NewWidth = *iData;
 648                 }
 649                 if( term->NewWidth )
 650                         ret = term->NewWidth;
 651                 else if( term->Mode == TERM_MODE_TEXT )
 652                         ret = term->TextWidth;
 653                 else
 654                         ret = term->Width;
 655                 LEAVE('i', ret);
 656                 return ret;
 657
 658         // Get/set the terminal height
 659         case TERM_IOCTL_HEIGHT:
 660                 if(Data != NULL) {
 661                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 662                                 LEAVE('i', -1);
 663                                 return -1;
 664                         }
 665                         term->NewHeight = *iData;
 666                 }
 667                 if( term->NewHeight )
 668                         ret = term->NewHeight;
 669                 else if( term->Mode == TERM_MODE_TEXT )
 670                         ret = term->TextHeight;
 671                 else
 672                         ret = term->Height;
 673                 LEAVE('i', ret);
 674                 return ret;
 675
 676         case TERM_IOCTL_FORCESHOW:
 677                 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
 678                         Threads_GetTID(), (int)Node->Inode);
 679                 VT_SetTerminal( Node->Inode );
 680                 LEAVE('i', 1);
 681                 return 1;
 682         }
 683         LEAVE('i', -1);
 684         return -1;
 685 }
 686
 687 /**
 688  * \fn void VT_SetTerminal(int ID)
 689  * \brief Set the current terminal
 690  */
 691 void VT_SetTerminal(int ID)
 692 {
 693         // Update current terminal ID
 694         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 695         giVT_CurrentTerminal = ID;
 696         gpVT_CurTerm = &gVT_Terminals[ID];
 697
 698         // Update cursor
 699         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT && !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
 700         {
 701                 tVideo_IOCtl_Pos        pos;
 702                 pos.x = (gpVT_CurTerm->WritePos - gpVT_CurTerm->ViewPos) % gpVT_CurTerm->TextWidth;
 703                 pos.y = (gpVT_CurTerm->WritePos - gpVT_CurTerm->ViewPos) / gpVT_CurTerm->TextWidth;
 704                 if( pos.x < gpVT_CurTerm->TextHeight )
 705                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 706         }
 707
 708         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 709                 VT_SetMode( VIDEO_BUFFMT_TEXT );
 710         else
 711                 VT_SetMode( VIDEO_BUFFMT_FRAMEBUFFER );
 712
 713         // Update the screen
 714         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 715 }
 716
 717 /**
 718  * \fn void VT_KBCallBack(Uint32 Codepoint)
 719  * \brief Called on keyboard interrupt
 720  * \param Codepoint     Pseudo-UTF32 character
 721  *
 722  * Handles a key press and sends the key code to the user's buffer.
 723  * If the code creates a kernel-magic sequence, it is not passed to the
 724  * user and is handled in-kernel.
 725  */
 726 void VT_KBCallBack(Uint32 Codepoint)
 727 {
 728         tVTerm  *term = gpVT_CurTerm;
 729
 730         // How the hell did we get a codepoint of zero?
 731         if(Codepoint == 0)      return;
 732
 733         // Key Up
 734         if( Codepoint & 0x80000000 )
 735         {
 736                 Codepoint &= 0x7FFFFFFF;
 737                 switch(Codepoint)
 738                 {
 739                 #if !USE_CTRL_ALT
 740                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 741                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 742                 #else
 743                 case KEY_LALT:  gbVT_AltDown &= ~1;     break;
 744                 case KEY_RALT:  gbVT_AltDown &= ~2;     break;
 745                 case KEY_LCTRL: gbVT_CtrlDown &= ~1     break;
 746                 case KEY_RCTRL: gbVT_CtrlDown &= ~2;    break;
 747                 #endif
 748                 }
 749                 return;
 750         }
 751
 752         switch(Codepoint)
 753         {
 754         #if !USE_CTRL_ALT       // HACK: Use both shifts instead of Ctrl-Alt
 755         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 756         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 757         #else
 758         case KEY_LALT:  gbVT_AltDown |= 1;      break;
 759         case KEY_RALT:  gbVT_AltDown |= 2;      break;
 760         case KEY_LCTRL: gbVT_CtrlDown |= 1;     break;
 761         case KEY_RCTRL: gbVT_CtrlDown |= 2;     break;
 762         #endif
 763
 764         default:
 765                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 766                         break;
 767                 switch(Codepoint)
 768                 {
 769                 case KEY_F1:    VT_SetTerminal(0);      return;
 770                 case KEY_F2:    VT_SetTerminal(1);      return;
 771                 case KEY_F3:    VT_SetTerminal(2);      return;
 772                 case KEY_F4:    VT_SetTerminal(3);      return;
 773                 case KEY_F5:    VT_SetTerminal(4);      return;
 774                 case KEY_F6:    VT_SetTerminal(5);      return;
 775                 case KEY_F7:    VT_SetTerminal(6);      return;
 776                 case KEY_F8:    VT_SetTerminal(7);      return;
 777                 case KEY_F9:    VT_SetTerminal(8);      return;
 778                 case KEY_F10:   VT_SetTerminal(9);      return;
 779                 case KEY_F11:   VT_SetTerminal(10);     return;
 780                 case KEY_F12:   VT_SetTerminal(11);     return;
 781                 // Scrolling
 782                 case KEY_PGUP:
 783                         if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
 784                                 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
 785                         else
 786                                 gpVT_CurTerm->ViewPos = 0;
 787                         return;
 788                 case KEY_PGDOWN:
 789                         if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*gpVT_CurTerm->Height*(giVT_Scrollback-1) )
 790                                 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
 791                         else
 792                                 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*gpVT_CurTerm->Height*(giVT_Scrollback-1);
 793                         return;
 794                 }
 795         }
 796
 797         // Encode key
 798         if(term->Mode == TERM_MODE_TEXT)
 799         {
 800                 Uint8   buf[6] = {0};
 801                  int    len = 0;
 802
 803                 // Ignore Modifer Keys
 804                 if(Codepoint > KEY_MODIFIERS)   return;
 805
 806                 // Get UTF-8/ANSI Encoding
 807                 switch(Codepoint)
 808                 {
 809                 case KEY_LEFT:
 810                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 811                         len = 3;
 812                         break;
 813                 case KEY_RIGHT:
 814                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 815                         len = 3;
 816                         break;
 817                 case KEY_UP:
 818                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 819                         len = 3;
 820                         break;
 821                 case KEY_DOWN:
 822                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 823                         len = 3;
 824                         break;
 825
 826                 case KEY_PGUP:
 827                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 828                         //len = 4;      // Commented out until I'm sure
 829                         break;
 830                 case KEY_PGDOWN:
 831                         len = 0;
 832                         break;
 833
 834                 // Attempt to encode in UTF-8
 835                 default:
 836                         len = WriteUTF8( buf, Codepoint );
 837                         if(len == 0) {
 838                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 839                         }
 840                         break;
 841                 }
 842
 843                 if(len == 0) {
 844                         // Unprintable / Don't Pass
 845                         return;
 846                 }
 847
 848                 // Write
 849                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 850                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 851                 else {
 852                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 853                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 854                 }
 855                 // Roll the buffer over
 856                 term->InputWrite += len;
 857                 term->InputWrite %= MAX_INPUT_CHARS8;
 858                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 859                         term->InputRead = term->InputWrite + 1;
 860                         term->InputRead %= MAX_INPUT_CHARS8;
 861                 }
 862         }
 863         else
 864         {
 865                 // Encode the raw UTF-32 Key
 866                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 867                 term->InputWrite ++;
 868                 term->InputWrite %= MAX_INPUT_CHARS32;
 869                 if(term->InputRead == term->InputWrite) {
 870                         term->InputRead ++;
 871                         term->InputRead %= MAX_INPUT_CHARS32;
 872                 }
 873         }
 874
 875         VFS_MarkAvaliable(&term->Node, 1);
 876
 877         // Wake up the thread waiting on us
 878         //if( term->ReadingThread >= 0 ) {
 879         //      Threads_WakeTID(term->ReadingThread);
 880         //}
 881 }
 882
 883 /**
 884  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 885  * \brief Clears a line in a virtual terminal
 886  */
 887 void VT_int_ClearLine(tVTerm *Term, int Num)
 888 {
 889          int    i;
 890         tVT_Char        *cell = &Term->Text[ Num*Term->TextWidth ];
 891         if( Num < 0 || Num >= Term->TextHeight * (giVT_Scrollback + 1) )        return ;
 892         //ENTER("pTerm iNum", Term, Num);
 893         for( i = Term->TextWidth; i--; )
 894         {
 895                 cell[ i ].Ch = 0;
 896                 cell[ i ].Colour = Term->CurColour;
 897         }
 898         //LEAVE('-');
 899 }
 900
 901 /**
 902  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 903  * \brief Parses a VT100 Escape code
 904  */
 905 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 906 {
 907         char    c;
 908          int    argc = 0, j = 1;
 909          int    tmp;
 910          int    args[6] = {0,0,0,0};
 911
 912         switch(Buffer[0])
 913         {
 914         //Large Code
 915         case '[':
 916                 // Get Arguments
 917                 c = Buffer[j++];
 918                 if( '0' <= c && c <= '9' )
 919                 {
 920                         do {
 921                                 if(c == ';')    c = Buffer[j++];
 922                                 while('0' <= c && c <= '9') {
 923                                         args[argc] *= 10;
 924                                         args[argc] += c-'0';
 925                                         c = Buffer[j++];
 926                                 }
 927                                 argc ++;
 928                         } while(c == ';');
 929                 }
 930
 931                 // Get Command
 932                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 933                 {
 934                         switch(c)
 935                         {
 936                         // Left
 937                         case 'D':
 938                                 if(argc == 1)   tmp = args[0];
 939                                 else    tmp = 1;
 940
 941                                 if( Term->WritePos-(tmp-1) % Term->TextWidth == 0 )
 942                                         Term->WritePos -= Term->WritePos % Term->TextWidth;
 943                                 else
 944                                         Term->WritePos -= tmp;
 945                                 break;
 946
 947                         // Right
 948                         case 'C':
 949                                 if(argc == 1)   tmp = args[0];
 950                                 else    tmp = 1;
 951                                 if( (Term->WritePos + tmp) % Term->TextWidth == 0 ) {
 952                                         Term->WritePos -= Term->WritePos % Term->TextWidth;
 953                                         Term->WritePos += Term->TextWidth - 1;
 954                                 } else
 955                                         Term->WritePos += tmp;
 956                                 break;
 957
 958                         // Clear By Line
 959                         case 'J':
 960                                 // Clear Screen
 961                                 switch(args[0])
 962                                 {
 963                                 case 2:
 964                                         {
 965                                          int    i = Term->TextHeight * (giVT_Scrollback + 1);
 966                                         while( i-- )    VT_int_ClearLine(Term, i);
 967                                         Term->WritePos = 0;
 968                                         Term->ViewPos = 0;
 969                                         VT_int_UpdateScreen(Term, 1);
 970                                         }
 971                                         break;
 972                                 }
 973                                 break;
 974                         // Set cursor position
 975                         case 'h':
 976                                 Term->WritePos = args[0] + args[1]*Term->TextWidth;
 977                                 Log_Debug("VTerm", "args = {%i, %i}", args[0], args[1]);
 978                                 break;
 979                         // Set Font flags
 980                         case 'm':
 981                                 for( ; argc--; )
 982                                 {
 983                                         // Flags
 984                                         if( 0 <= args[argc] && args[argc] <= 8)
 985                                         {
 986                                                 switch(args[argc])
 987                                                 {
 988                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 989                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 990                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 991                                                 }
 992                                         }
 993                                         // Foreground Colour
 994                                         else if(30 <= args[argc] && args[argc] <= 37) {
 995                                                 Term->CurColour &= 0xF000FFFF;
 996                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 997                                         }
 998                                         // Background Colour
 999                                         else if(40 <= args[argc] && args[argc] <= 47) {
1000                                                 Term->CurColour &= 0xFFFF8000;
1001                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
1002                                         }
1003                                 }
1004                                 break;
1005                         default:
1006                                 Log_Warning("VTerm", "Unknown control sequence");
1007                                 break;
1008                         }
1009                 }
1010                 break;
1011
1012         default:        break;
1013         }
1014
1015         //Log_Debug("VTerm", "j = %i, Buffer = '%s'", j, Buffer);
1016         return j;
1017 }
1018
1019 /**
1020  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
1021  * \brief Print a string to the Virtual Terminal
1022  */
1023 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
1024 {
1025         Uint32  val;
1026          int    i;
1027
1028         // Iterate
1029         for( i = 0; i < Count; i++ )
1030         {
1031                 // Handle escape sequences
1032                 if( Buffer[i] == 0x1B )
1033                 {
1034                         i ++;
1035                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]) - 1;
1036                         continue;
1037                 }
1038
1039                 // Fast check for non UTF-8
1040                 if( Buffer[i] < 128 )   // Plain ASCII
1041                         VT_int_PutChar(Term, Buffer[i]);
1042                 else {  // UTF-8
1043                         i += ReadUTF8(&Buffer[i], &val) - 1;
1044                         VT_int_PutChar(Term, val);
1045                 }
1046         }
1047         // Update Screen
1048         VT_int_UpdateScreen( Term, 0 );
1049
1050         // Update cursor
1051         if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
1052         {
1053                 tVideo_IOCtl_Pos        pos;
1054                 pos.x = (Term->WritePos - Term->ViewPos) % Term->TextWidth;
1055                 pos.y = (Term->WritePos - Term->ViewPos) / Term->TextWidth;
1056                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
1057         }
1058 }
1059
1060 /**
1061  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
1062  * \brief Write a single character to a VTerm
1063  */
1064 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
1065 {
1066          int    i;
1067
1068         switch(Ch)
1069         {
1070         case '\0':      return; // Ignore NULL byte
1071         case '\n':
1072                 VT_int_UpdateScreen( Term, 0 ); // Update the line before newlining
1073                 Term->WritePos += Term->TextWidth;
1074         case '\r':
1075                 Term->WritePos -= Term->WritePos % Term->TextWidth;
1076                 break;
1077
1078         case '\t':
1079                 do {
1080                         Term->Text[ Term->WritePos ].Ch = '\0';
1081                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1082                         Term->WritePos ++;
1083                 } while(Term->WritePos & 7);
1084                 break;
1085
1086         case '\b':
1087                 // Backspace is invalid at Offset 0
1088                 if(Term->WritePos == 0) break;
1089
1090                 Term->WritePos --;
1091                 // Singe Character
1092                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
1093                         Term->Text[ Term->WritePos ].Ch = 0;
1094                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1095                         break;
1096                 }
1097                 // Tab
1098                 i = 7;  // Limit it to 8
1099                 do {
1100                         Term->Text[ Term->WritePos ].Ch = 0;
1101                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1102                         Term->WritePos --;
1103                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
1104                 if(Term->Text[ Term->WritePos ].Ch != '\0')
1105                         Term->WritePos ++;
1106                 break;
1107
1108         default:
1109                 Term->Text[ Term->WritePos ].Ch = Ch;
1110                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1111                 Term->WritePos ++;
1112                 break;
1113         }
1114
1115         // Move Screen
1116         // - Check if we need to scroll the entire scrollback buffer
1117         if(Term->WritePos >= Term->TextWidth*Term->TextHeight*(giVT_Scrollback+1))
1118         {
1119                  int    base;
1120
1121                 // Move back by one
1122                 Term->WritePos -= Term->TextWidth;
1123                 // Update the scren
1124                 VT_int_UpdateScreen( Term, 0 );
1125
1126                 // Update view position
1127                 base = Term->TextWidth*Term->TextHeight*(giVT_Scrollback);
1128                 if(Term->ViewPos < base)
1129                         Term->ViewPos += Term->Width;
1130                 if(Term->ViewPos > base)
1131                         Term->ViewPos = base;
1132
1133                 // Scroll terminal cache
1134                 base = Term->TextWidth*(Term->TextHeight*(giVT_Scrollback+1)-1);
1135                 memcpy(
1136                         Term->Text,
1137                         &Term->Text[Term->TextWidth],
1138                         base*sizeof(tVT_Char)
1139                         );
1140
1141                 // Clear last row
1142                 for( i = 0; i < Term->TextWidth; i ++ )
1143                 {
1144                         Term->Text[ base + i ].Ch = 0;
1145                         Term->Text[ base + i ].Colour = Term->CurColour;
1146                 }
1147
1148                 VT_int_ScrollFramebuffer( Term );
1149                 VT_int_UpdateScreen( Term, 0 );
1150         }
1151         // Ok, so we only need to scroll the screen
1152         else if(Term->WritePos >= Term->ViewPos + Term->TextWidth*Term->TextHeight)
1153         {
1154                 //Debug("Term->WritePos (%i) >= %i",
1155                 //      Term->WritePos,
1156                 //      Term->ViewPos + Term->Width*Term->Height
1157                 //      );
1158                 //Debug("Scrolling screen only");
1159
1160                 // Update the last line
1161                 Term->WritePos -= Term->TextWidth;
1162                 VT_int_UpdateScreen( Term, 0 );
1163                 Term->WritePos += Term->TextWidth;
1164                 VT_int_ClearLine(Term, Term->WritePos / Term->TextWidth);
1165
1166                 // Scroll
1167                 Term->ViewPos += Term->TextWidth;
1168                 //Debug("Term->ViewPos = %i", Term->ViewPos);
1169                 VT_int_ScrollFramebuffer( Term );
1170                 VT_int_UpdateScreen( Term, 0 );
1171         }
1172
1173         //LEAVE('-');
1174 }
1175
1176 /**
1177  * \fn void VT_int_ScrollFramebuffer( tVTerm *Term )
1178  * \note Scrolls the framebuffer by 1 text line
1179  */
1180 void VT_int_ScrollFramebuffer( tVTerm *Term )
1181 {
1182          int    tmp;
1183         struct {
1184                 Uint8   Op;
1185                 Uint16  DstX, DstY;
1186                 Uint16  SrcX, SrcY;
1187                 Uint16  W, H;
1188         } PACKED        buf;
1189
1190         // Only update if this is the current terminal
1191         if( Term != gpVT_CurTerm )      return;
1192
1193         // Switch to 2D Command Stream
1194         tmp = VIDEO_BUFFMT_2DSTREAM;
1195         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
1196
1197         // BLIT from 0,0 to 0,giVT_CharHeight
1198         buf.Op = VIDEO_2DOP_BLIT;
1199         buf.DstX = 0;   buf.DstY = 0;
1200         buf.SrcX = 0;   buf.SrcY = giVT_CharHeight;
1201         buf.W = Term->TextWidth * giVT_CharWidth;
1202         buf.H = (Term->TextHeight-1) * giVT_CharHeight;
1203         VFS_WriteAt(giVT_OutputDevHandle, 0, sizeof(buf), &buf);
1204
1205         // Restore old mode (this function is only called during text mode)
1206         tmp = VIDEO_BUFFMT_TEXT;
1207         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
1208 }
1209
1210 /**
1211  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
1212  * \brief Updates the video framebuffer
1213  */
1214 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
1215 {
1216         // Only update if this is the current terminal
1217         if( Term != gpVT_CurTerm )      return;
1218
1219         switch( Term->Mode )
1220         {
1221         case TERM_MODE_TEXT:
1222                 // Re copy the entire screen?
1223                 if(UpdateAll) {
1224                         VFS_WriteAt(
1225                                 giVT_OutputDevHandle,
1226                                 0,
1227                                 Term->TextWidth*Term->TextHeight*sizeof(tVT_Char),
1228                                 &Term->Text[Term->ViewPos]
1229                                 );
1230                 }
1231                 // Only copy the current line
1232                 else {
1233                          int    pos = Term->WritePos - Term->WritePos % Term->TextWidth;
1234                         VFS_WriteAt(
1235                                 giVT_OutputDevHandle,
1236                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
1237                                 Term->TextWidth*sizeof(tVT_Char),
1238                                 &Term->Text[pos]
1239                                 );
1240                 }
1241                 break;
1242         case TERM_MODE_FB:
1243                 VFS_WriteAt(
1244                         giVT_OutputDevHandle,
1245                         0,
1246                         Term->Width*Term->Height*sizeof(Uint32),
1247                         Term->Buffer
1248                         );
1249                 break;
1250         }
1251 }
1252
1253 /**
1254  * \brief Update the screen mode
1255  * \param Term  Terminal to update
1256  * \param NewMode       New mode to set
1257  * \param NewWidth      New framebuffer width
1258  * \param NewHeight     New framebuffer height
1259  */
1260 void VT_int_ChangeMode(tVTerm *Term, int NewMode, int NewWidth, int NewHeight)
1261 {
1262          int    oldW = Term->Width;
1263          int    oldTW = oldW / giVT_CharWidth;
1264          int    oldH = Term->Height;
1265          int    oldTH = oldH / giVT_CharWidth;
1266         tVT_Char        *oldTBuf = Term->Text;
1267         Uint32  *oldFB = Term->Buffer;
1268          int    w, h, i;
1269
1270         // TODO: Increase RealWidth/RealHeight when this happens
1271         if(NewWidth > giVT_RealWidth)   NewWidth = giVT_RealWidth;
1272         if(NewHeight > giVT_RealHeight) NewHeight = giVT_RealHeight;
1273
1274         // Calculate new dimensions
1275         Term->TextWidth = NewWidth / giVT_CharWidth;
1276         Term->TextHeight = NewHeight / giVT_CharHeight;
1277         Term->Width = NewWidth;
1278         Term->Height = NewHeight;
1279         Term->Mode = NewMode;
1280
1281         // Allocate new buffers
1282         // - Text
1283         Term->Text = calloc(
1284                 Term->TextWidth * Term->TextHeight * (giVT_Scrollback+1),
1285                 sizeof(tVT_Char)
1286                 );
1287         if(oldTBuf) {
1288                 // Copy old buffer
1289                 w = oldTW;
1290                 if( w > Term->TextWidth )       w = Term->TextWidth;
1291                 h = oldTH;
1292                 if( h > Term->TextHeight )      h = Term->TextHeight;
1293                 h *= giVT_Scrollback + 1;
1294                 for( i = 0; i < h; i ++ )
1295                 {
1296                         memcpy(
1297                                 &Term->Text[i*Term->TextWidth],
1298                                 &oldTBuf[i*oldTW],
1299                                 w*sizeof(tVT_Char)
1300                                 );
1301
1302                 }
1303         }
1304
1305         // - Framebuffer
1306         Term->Buffer = calloc( Term->Width * Term->Height, sizeof(Uint32) );
1307         if(oldFB) {
1308                 // Copy old buffer
1309                 w = oldW;
1310                 if( w > Term->Width )   w = Term->Width;
1311                 h = oldH;
1312                 if( h > Term->Height )  h = Term->Height;
1313                 for( i = 0; i < h; i ++ )
1314                 {
1315                         memcpy(
1316                                 &Term->Buffer[i*Term->Width],
1317                                 &oldFB[i*oldW],
1318                                 w*sizeof(Uint32)
1319                                 );
1320                 }
1321         }
1322
1323
1324         // Debug
1325         switch(NewMode)
1326         {
1327         case TERM_MODE_TEXT:
1328                 Log_Log("VTerm", "Set VT %p to text mode (%ix%i)",
1329                         Term, Term->TextWidth, Term->TextHeight);
1330                 break;
1331         case TERM_MODE_FB:
1332                 Log_Log("VTerm", "Set VT %p to framebuffer mode (%ix%i)",
1333                         Term, Term->Width, Term->Height);
1334                 break;
1335         //case TERM_MODE_2DACCEL:
1336         //case TERM_MODE_3DACCEL:
1337         //      return;
1338         }
1339 }
1340
1341 // ---
1342 // Font Render
1343 // ---
1344 #define MONOSPACE_FONT  10816
1345
1346 #if MONOSPACE_FONT == 10808     // 8x8
1347 # include "vterm_font_8x8.h"
1348 #elif MONOSPACE_FONT == 10816   // 8x16
1349 # include "vterm_font_8x16.h"
1350 #endif
1351
1352 // === PROTOTYPES ===
1353 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
1354
1355 // === GLOBALS ===
1356 int     giVT_CharWidth = FONT_WIDTH;
1357 int     giVT_CharHeight = FONT_HEIGHT;
1358
1359 // === CODE ===
1360 /**
1361  * \brief Render a font character
1362  */
1363 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Depth, int Pitch, Uint32 BGC, Uint32 FGC)
1364 {
1365         Uint8   *font;
1366          int    x, y;
1367
1368         // 8-bpp and below
1369         if( Depth <= 8 )
1370         {
1371                 Uint8   *buf = Buffer;
1372
1373                 font = VT_Font_GetChar(Codepoint);
1374
1375                 for(y = 0; y < FONT_HEIGHT; y ++)
1376                 {
1377                         for(x = 0; x < FONT_WIDTH; x ++)
1378                         {
1379                                 if(*font & (1 << (FONT_WIDTH-x-1)))
1380                                         buf[x] = FGC;
1381                                 else
1382                                         buf[x] = BGC;
1383                         }
1384                         buf = (void*)( (tVAddr)buf + Pitch );
1385                         font ++;
1386                 }
1387         }
1388         // 16-bpp and below
1389         else if( Depth <= 16 )
1390         {
1391                 Uint16  *buf = Buffer;
1392
1393                 font = VT_Font_GetChar(Codepoint);
1394
1395                 for(y = 0; y < FONT_HEIGHT; y ++)
1396                 {
1397                         for(x = 0; x < FONT_WIDTH; x ++)
1398                         {
1399                                 if(*font & (1 << (FONT_WIDTH-x-1)))
1400                                         buf[x] = FGC;
1401                                 else
1402                                         buf[x] = BGC;
1403                         }
1404                         buf = (void*)( (tVAddr)buf + Pitch );
1405                         font ++;
1406                 }
1407         }
1408         // 24-bpp colour
1409         // - Special handling to not overwrite the next pixel
1410         //TODO: Endian issues here
1411         else if( Depth == 24 )
1412         {
1413                 Uint8   *buf = Buffer;
1414                 Uint8   bg_r = (BGC >> 16) & 0xFF;
1415                 Uint8   bg_g = (BGC >>  8) & 0xFF;
1416                 Uint8   bg_b = (BGC >>  0) & 0xFF;
1417                 Uint8   fg_r = (FGC >> 16) & 0xFF;
1418                 Uint8   fg_g = (FGC >>  8) & 0xFF;
1419                 Uint8   fg_b = (FGC >>  0) & 0xFF;
1420
1421                 font = VT_Font_GetChar(Codepoint);
1422
1423                 for(y = 0; y < FONT_HEIGHT; y ++)
1424                 {
1425                         for(x = 0; x < FONT_WIDTH; x ++)
1426                         {
1427                                 Uint8   r, g, b;
1428
1429                                 if(*font & (1 << (FONT_WIDTH-x-1))) {
1430                                         r = fg_r;       g = fg_g;       b = fg_b;
1431                                 }
1432                                 else {
1433                                         r = bg_r;       g = bg_g;       b = bg_b;
1434                                 }
1435                                 buf[x*3+0] = b;
1436                                 buf[x*3+1] = g;
1437                                 buf[x*3+2] = r;
1438                         }
1439                         buf = (void*)( (tVAddr)buf + Pitch );
1440                         font ++;
1441                 }
1442         }
1443         // 32-bpp colour (nice and easy)
1444         else if( Depth == 32 )
1445         {
1446                 Uint32  *buf = Buffer;
1447
1448                 font = VT_Font_GetChar(Codepoint);
1449
1450                 for(y = 0; y < FONT_HEIGHT; y ++)
1451                 {
1452                         for(x = 0; x < FONT_WIDTH; x ++)
1453                         {
1454                                 if(*font & (1 << (FONT_WIDTH-x-1)))
1455                                         buf[x] = FGC;
1456                                 else
1457                                         buf[x] = BGC;
1458                         }
1459                         buf = (Uint32*)( (tVAddr)buf + Pitch );
1460                         font ++;
1461                 }
1462         }
1463 }
1464
1465 /**
1466  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1467  * \brief Converts a 12-bit colour into 24 bits
1468  */
1469 Uint32 VT_Colour12to24(Uint16 Col12)
1470 {
1471         Uint32  ret;
1472          int    tmp;
1473         tmp = Col12 & 0xF;
1474         ret  = (tmp << 0) | (tmp << 4);
1475         tmp = (Col12 & 0xF0) >> 4;
1476         ret |= (tmp << 8) | (tmp << 12);
1477         tmp = (Col12 & 0xF00) >> 8;
1478         ret |= (tmp << 16) | (tmp << 20);
1479         return ret;
1480 }
1481 /**
1482  * \brief Converts a 12-bit colour into 15 bits
1483  */
1484 Uint16 VT_Colour12to15(Uint16 Col12)
1485 {
1486         Uint32  ret;
1487          int    tmp;
1488         tmp = Col12 & 0xF;
1489         ret  = (tmp << 1) | (tmp & 1);
1490         tmp = (Col12 & 0xF0) >> 4;
1491         ret |= ( (tmp << 1) | (tmp & 1) ) << 5;
1492         tmp = (Col12 & 0xF00) >> 8;
1493         ret |= ( (tmp << 1) | (tmp & 1) ) << 10;
1494         return ret;
1495 }
1496
1497 /**
1498  * \brief Converts a 12-bit colour into any other depth
1499  * \param Col12 12-bit source colour
1500  * \param Depth Desired bit deptj
1501  * \note Green then blue get the extra avaliable bits (16:5-6-5, 14:4-5-5)
1502  */
1503 Uint32 VT_Colour12toN(Uint16 Col12, int Depth)
1504 {
1505         Uint32  ret;
1506         Uint32  r, g, b;
1507          int    rSize, gSize, bSize;
1508
1509         // Fast returns
1510         if( Depth == 24 )       return VT_Colour12to24(Col12);
1511         if( Depth == 15 )       return VT_Colour12to15(Col12);
1512         // - 32 is a special case, it's usually 24-bit colour with an unused byte
1513         if( Depth == 32 )       return VT_Colour12to24(Col12);
1514
1515         // Bounds checks
1516         if( Depth < 8 ) return 0;
1517         if( Depth > 32 )        return 0;
1518
1519         r = Col12 & 0xF;
1520         g = (Col12 & 0xF0) >> 4;
1521         b = (Col12 & 0xF00) >> 8;
1522
1523         rSize = gSize = bSize = Depth / 3;
1524         if( rSize + gSize + bSize < Depth )     // Depth % 3 == 1
1525                 gSize ++;
1526         if( rSize + gSize + bSize < Depth )     // Depth % 3 == 2
1527                 bSize ++;
1528
1529         // Expand
1530         r <<= rSize - 4;        g <<= gSize - 4;        b <<= bSize - 4;
1531         // Fill with the lowest bit
1532         if( Col12 & 0x001 )     r |= (1 << (rSize - 4)) - 1;
1533         if( Col12 & 0x010 )     r |= (1 << (gSize - 4)) - 1;
1534         if( Col12 & 0x100 )     r |= (1 << (bSize - 4)) - 1;
1535
1536         // Create output
1537         ret  = r;
1538         ret |= g << rSize;
1539         ret |= b << (rSize + gSize);
1540
1541         return ret;
1542 }
1543
1544 /**
1545  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1546  * \brief Gets an index into the font array given a Unicode Codepoint
1547  * \note See http://en.wikipedia.org/wiki/CP437
1548  */
1549 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1550 {
1551          int    index = 0;
1552         if(Codepoint < 128)
1553                 return &VTermFont[Codepoint*FONT_HEIGHT];
1554         switch(Codepoint)
1555         {
1556         case 0xC7:      index = 128;    break;  // Ç
1557         case 0xFC:      index = 129;    break;  // ü
1558         case 0xE9:      index = 130;    break;  // é
1559         case 0xE2:      index = 131;    break;  // â
1560         case 0xE4:      index = 132;    break;  // ä
1561         case 0xE0:      index = 133;    break;  // à
1562         case 0xE5:      index = 134;    break;  // å
1563         case 0xE7:      index = 135;    break;  // ç
1564         case 0xEA:      index = 136;    break;  // ê
1565         case 0xEB:      index = 137;    break;  // ë
1566         case 0xE8:      index = 138;    break;  // è
1567         case 0xEF:      index = 139;    break;  // ï
1568         case 0xEE:      index = 140;    break;  // î
1569         case 0xEC:      index = 141;    break;  // ì
1570         case 0xC4:      index = 142;    break;  // Ä
1571         case 0xC5:      index = 143;    break;  // Å
1572         }
1573
1574         return &VTermFont[index*FONT_HEIGHT];
1575 }
1576
1577 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1578 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1579 EXPORT(VT_Font_Render);
1580 EXPORT(VT_Colour12to24);