Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #include <common.h>
   5 #include <fs_devfs.h>
   6 #include <modules.h>
   7 #include <tpl_drv_video.h>
   8 #include <tpl_drv_keyboard.h>
   9 #include <tpl_drv_terminal.h>
  10 #include <errno.h>
  11
  12 // === CONSTANTS ===
  13 #define VERSION ((0<<8)|(50))
  14
  15 #define NUM_VTS 7
  16 #define MAX_INPUT_CHARS32       64
  17 #define MAX_INPUT_CHARS8        (MAX_INPUT_CHARS32*4)
  18 #define VT_SCROLLBACK   1       // 2 Screens of text
  19 #define DEFAULT_OUTPUT  "VGA"
  20 //#define DEFAULT_OUTPUT        "BochsGA"
  21 #define DEFAULT_INPUT   "PS2Keyboard"
  22 #define DEFAULT_WIDTH   80
  23 #define DEFAULT_HEIGHT  25
  24 #define DEFAULT_COLOUR  (VT_COL_BLACK|(0xAAA<<16))
  25
  26 #define VT_FLAG_HIDECSR 0x01
  27
  28 enum eVT_InModes {
  29         VT_INMODE_TEXT8,        // UTF-8 Text Mode (VT100 Emulation)
  30         VT_INMODE_TEXT32,       // UTF-32 Text Mode (Acess Native)
  31         NUM_VT_INMODES
  32 };
  33
  34 // === TYPES ===
  35 typedef struct {
  36          int    Mode;   //!< Current Mode (see ::eTplTerminal_Modes)
  37          int    Flags;  //!< Flags (see VT_FLAG_*)
  38         short   Width;  //!< Virtual Width
  39         short   Height; //!< Virtual Height
  40         short   RealWidth;      //!< Real Width
  41         short   RealHeight;     //!< Real Height
  42
  43          int    ViewPos;        //!< View Buffer Offset (Text Only)
  44          int    WritePos;       //!< Write Buffer Offset (Text Only)
  45         Uint32  CurColour;      //!< Current Text Colour
  46         char    Name[2];        //!< Name of the terminal
  47
  48          int    InputRead;      //!< Input buffer read position
  49          int    InputWrite;     //!< Input buffer write position
  50         char    InputBuffer[MAX_INPUT_CHARS8];
  51         union {
  52                 tVT_Char        *Text;
  53                 Uint32          *Buffer;
  54         };
  55         tVFS_Node       Node;
  56 } tVTerm;
  57
  58 // === IMPORTS ===
  59 extern void     Debug_SetKTerminal(char *File);
  60
  61 // === PROTOTYPES ===
  62  int    VT_Install(char **Arguments);
  63 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  64 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  65  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  66 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  67 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  68  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  69 void    VT_SetTerminal(int ID);
  70 void    VT_KBCallBack(Uint32 Codepoint);
  71 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  72  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  73 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  74 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  75 void    VT_int_ChangeMode(tVTerm *Term, int NewMode);
  76
  77 // === CONSTANTS ===
  78 const Uint16    caVT100Colours[] = {
  79                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  80                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  81         };
  82
  83 // === GLOBALS ===
  84 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
  85 tDevFS_Driver   gVT_DrvInfo = {
  86         NULL, "VTerm",
  87         {
  88         .Flags = VFS_FFLAG_DIRECTORY,
  89         .Size = NUM_VTS,
  90         .Inode = -1,
  91         .NumACLs = 0,
  92         .ReadDir = VT_ReadDir,
  93         .FindDir = VT_FindDir,
  94         .IOCtl = VT_Root_IOCtl
  95         }
  96 };
  97 // --- Terminals ---
  98 tVTerm  gVT_Terminals[NUM_VTS];
  99  int    giVT_CurrentTerminal = 0;
 100 // --- Driver Handles ---
 101 char    *gsVT_OutputDevice = NULL;
 102 char    *gsVT_InputDevice = NULL;
 103  int    giVT_OutputDevHandle = -2;
 104  int    giVT_InputDevHandle = -2;
 105 // --- Key States --- (Used for VT Switching/Magic Combos)
 106  int    gbVT_CtrlDown = 0;
 107  int    gbVT_AltDown = 0;
 108  int    gbVT_SysrqDown = 0;
 109
 110 // === CODE ===
 111 /**
 112  * \fn int VT_Install(char **Arguments)
 113  * \brief Installs the Virtual Terminal Driver
 114  */
 115 int VT_Install(char **Arguments)
 116 {
 117         char    **args = Arguments;
 118         char    *arg;
 119          int    i;
 120
 121         // Scan Arguments
 122         if(Arguments)
 123         {
 124                 for( ; (arg = *args); args++ )
 125                 {
 126                         if(arg[0] != '-')       continue;
 127
 128                         switch(arg[1])
 129                         {
 130                         // Set output device
 131                         case 'o':
 132                                 if(args[1] ==  NULL)    break;
 133                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 134                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 135                                 strcpy(gsVT_OutputDevice, args[1]);
 136                                 args ++;
 137                                 break;
 138
 139                         // Set input device
 140                         case 'i':
 141                                 if(args[1] == NULL)     break;
 142                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 143                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 144                                 strcpy(gsVT_InputDevice, args[1]);
 145                                 args ++;
 146                                 break;
 147
 148                         }
 149                 }
 150         }
 151
 152         // Apply Defaults
 153         if(!gsVT_OutputDevice)  gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
 154         if(!gsVT_InputDevice)   gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
 155
 156         LOG("Using '%s' as output", gsVT_OutputDevice);
 157         LOG("Using '%s' as input", gsVT_InputDevice);
 158
 159         // Create Nodes
 160         for( i = 0; i < NUM_VTS; i++ )
 161         {
 162                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 163                 gVT_Terminals[i].Flags = 0;
 164                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 165                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 166                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 167                 gVT_Terminals[i].WritePos = 0;
 168                 gVT_Terminals[i].ViewPos = 0;
 169
 170                 gVT_Terminals[i].Buffer = calloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK, sizeof(tVT_Char) );
 171
 172                 gVT_Terminals[i].Name[0] = '0'+i;
 173                 gVT_Terminals[i].Name[1] = '\0';
 174                 gVT_Terminals[i].Node.Inode = i;
 175                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 176                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 177
 178                 gVT_Terminals[i].Node.Read = VT_Read;
 179                 gVT_Terminals[i].Node.Write = VT_Write;
 180                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 181         }
 182
 183         // Add to DevFS
 184         DevFS_AddDevice( &gVT_DrvInfo );
 185
 186         // Set kernel output to VT0
 187         //Debug_SetKTerminal("/Devices/VTerm/0");
 188
 189         return 0;
 190 }
 191
 192 /**
 193  * \fn void VT_InitOutput()
 194  * \brief Initialise Video Output
 195  */
 196 void VT_InitOutput()
 197 {
 198         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 199         LOG("giVT_OutputDevHandle = %x\n", giVT_OutputDevHandle);
 200         VT_SetTerminal( 0 );
 201 }
 202
 203 /**
 204  * \fn void VT_InitInput()
 205  * \brief Initialises the input
 206  */
 207 void VT_InitInput()
 208 {
 209         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 210         LOG("giVT_InputDevHandle = %x\n", giVT_InputDevHandle);
 211         if(giVT_InputDevHandle == -1)   return ;
 212         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 213 }
 214
 215 /**
 216  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 217  * \brief Read from the VTerm Directory
 218  */
 219 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 220 {
 221         if(Pos < 0)     return NULL;
 222         if(Pos >= NUM_VTS)      return NULL;
 223         return strdup( gVT_Terminals[Pos].Name );
 224 }
 225
 226 /**
 227  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 228  * \brief Find an item in the VTerm directory
 229  */
 230 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 231 {
 232          int    num;
 233
 234         //ENTER("pNode sName", Node, Name);
 235
 236         // Open the input and output files if needed
 237         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 238         if(giVT_InputDevHandle == -2)   VT_InitInput();
 239
 240         // Sanity check name
 241         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 242                 LEAVE('n');
 243                 return NULL;
 244         }
 245         // Get index
 246         num = Name[0] - '0';
 247         if(num >= NUM_VTS) {
 248                 LEAVE('n');
 249                 return NULL;
 250         }
 251         // Return node
 252         //LEAVE('p', &gVT_Terminals[num].Node);
 253         return &gVT_Terminals[num].Node;
 254 }
 255
 256 /**
 257  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 258  * \brief Control the VTerm Driver
 259  */
 260 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 261 {
 262          int    len;
 263         switch(Id)
 264         {
 265         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 266         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 267         case DRV_IOCTL_VERSION: return VERSION;
 268         case DRV_IOCTL_LOOKUP:  return 0;
 269
 270         case 4: // Get Video Driver
 271                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 272                 return strlen(gsVT_OutputDevice);
 273
 274         case 5: // Set Video Driver
 275                 if(!Data)       return -EINVAL;
 276                 if(Threads_GetUID() != 0)       return -EACCES;
 277
 278                 len = strlen(Data);
 279
 280                 free(gsVT_OutputDevice);
 281
 282                 gsVT_OutputDevice = malloc(len+1);
 283                 strcpy(gsVT_OutputDevice, Data);
 284
 285                 VFS_Close(giVT_OutputDevHandle);
 286                 giVT_OutputDevHandle = -1;
 287
 288                 VT_InitOutput();
 289                 return 1;
 290         }
 291         return 0;
 292 }
 293
 294 /**
 295  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 296  * \brief Read from a virtual terminal
 297  */
 298 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 299 {
 300          int    pos = 0;
 301         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 302
 303         // Check current mode
 304         switch(term->Mode)
 305         {
 306         case TERM_MODE_TEXT:
 307                 while(pos < Length)
 308                 {
 309                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 310
 311                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 312                         pos ++;
 313                         term->InputRead ++;
 314                         term->InputRead %= MAX_INPUT_CHARS8;
 315                 }
 316                 break;
 317
 318         case TERM_MODE_FB:
 319         case TERM_MODE_OPENGL:
 320                 while(pos < Length)
 321                 {
 322                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 323                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 324                         pos ++;
 325                         term->InputRead ++;
 326                         term->InputRead %= MAX_INPUT_CHARS32;
 327                 }
 328                 break;
 329         }
 330         return 0;
 331 }
 332
 333 /**
 334  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 335  * \brief Write to a virtual terminal
 336  */
 337 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 338 {
 339         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 340
 341         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 342
 343         // Write
 344         switch( term->Mode )
 345         {
 346         case TERM_MODE_TEXT:
 347                 VT_int_PutString(term, Buffer, Length);
 348                 break;
 349         }
 350
 351         //LEAVE('i', 0);
 352         return 0;
 353 }
 354
 355 /**
 356  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 357  * \brief Call an IO Control on a virtual terminal
 358  */
 359 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 360 {
 361          int    *iData = Data;
 362         tVTerm  *term = Node->ImplPtr;
 363         switch(Id)
 364         {
 365         case DRV_IOCTL_TYPE:    return DRV_TYPE_TERMINAL;
 366         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 367         case DRV_IOCTL_VERSION: return VERSION;
 368         case DRV_IOCTL_LOOKUP:  return 0;
 369
 370         // Get/Set the mode (and apply any changes)
 371         case TERM_IOCTL_MODETYPE:
 372                 if(Data == NULL)        return term->Mode;
 373
 374                 if(term->Mode != *iData) {
 375                         VT_int_ChangeMode(term, *iData);
 376                 }
 377
 378                 // Update the screen dimensions
 379                 if(giVT_CurrentTerminal == Node->Inode)
 380                         VT_SetTerminal( giVT_CurrentTerminal );
 381                 break;
 382
 383         // Get/set the terminal width
 384         case TERM_IOCTL_WIDTH:
 385                 if(Data == NULL)        return term->Width;
 386                 term->Width = *iData;
 387                 break;
 388
 389         // Get/set the terminal height
 390         case TERM_IOCTL_HEIGHT:
 391                 if(Data == NULL)        return term->Height;
 392                 term->Height = *iData;
 393                 break;
 394
 395         default:
 396                 return -1;
 397         }
 398         return 0;
 399 }
 400
 401 /**
 402  * \fn void VT_SetTerminal(int ID)
 403  * \brief Set the current terminal
 404  */
 405 void VT_SetTerminal(int ID)
 406 {
 407         tVideo_IOCtl_Mode       mode = {0};
 408          int    modeNum;
 409
 410         // Create the video mode
 411         mode.width = gVT_Terminals[ ID ].Width;
 412         mode.height = gVT_Terminals[ ID ].Height;
 413         // - Text Mode
 414         if(gVT_Terminals[ ID ].Mode == TERM_MODE_TEXT) {
 415                 mode.bpp = 12;
 416                 mode.flags = VIDEO_FLAG_TEXT;
 417         }
 418         // - Framebuffer or 3D
 419         else {
 420                 mode.bpp = 32;
 421                 mode.flags = 0;
 422         }
 423
 424         // Set video mode
 425         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 426         modeNum = mode.id;
 427         gVT_Terminals[ ID ].RealWidth = mode.width;
 428         gVT_Terminals[ ID ].RealHeight = mode.height;
 429         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETMODE, &modeNum );
 430
 431         // Update current terminal ID
 432         Log("Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 433         giVT_CurrentTerminal = ID;
 434
 435         // Update the screen
 436         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 437 }
 438
 439 /**
 440  * \fn void VT_KBCallBack(Uint32 Codepoint)
 441  * \brief Called on keyboard interrupt
 442  */
 443 void VT_KBCallBack(Uint32 Codepoint)
 444 {
 445         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 446
 447         // How the hell did we get a Codepoint of zero?
 448         if(Codepoint == 0)      return;
 449
 450         // Key Up
 451         if( Codepoint & 0x80000000 )
 452         {
 453                 Codepoint &= 0x7FFFFFFF;
 454                 switch(Codepoint)
 455                 {
 456                 case KEY_LALT:
 457                 case KEY_RALT:
 458                         gbVT_AltDown = 0;
 459                         break;
 460                 case KEY_LCTRL:
 461                 case KEY_RCTRL:
 462                         gbVT_CtrlDown = 0;
 463                         break;
 464                 }
 465                 return;
 466         }
 467
 468         switch(Codepoint)
 469         {
 470         case KEY_LALT:
 471         case KEY_RALT:
 472                 gbVT_AltDown = 1;
 473                 break;
 474         case KEY_LCTRL:
 475         case KEY_RCTRL:
 476                 gbVT_CtrlDown = 1;
 477                 break;
 478
 479         default:
 480                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 481                         break;
 482                 switch(Codepoint)
 483                 {
 484                 case KEY_F1:    VT_SetTerminal(0);      return;
 485                 case KEY_F2:    VT_SetTerminal(1);      return;
 486                 case KEY_F3:    VT_SetTerminal(2);      return;
 487                 case KEY_F4:    VT_SetTerminal(3);      return;
 488                 case KEY_F5:    VT_SetTerminal(4);      return;
 489                 case KEY_F6:    VT_SetTerminal(5);      return;
 490                 case KEY_F7:    VT_SetTerminal(6);      return;
 491                 case KEY_F8:    VT_SetTerminal(7);      return;
 492                 case KEY_F9:    VT_SetTerminal(8);      return;
 493                 case KEY_F10:   VT_SetTerminal(9);      return;
 494                 case KEY_F11:   VT_SetTerminal(10);     return;
 495                 case KEY_F12:   VT_SetTerminal(11);     return;
 496                 }
 497         }
 498
 499         // Encode key
 500         if(term->Mode == TERM_MODE_TEXT)
 501         {
 502                 Uint8   buf[6] = {0};
 503                  int    len;
 504
 505                 // Ignore Modifer Keys
 506                 if(Codepoint > KEY_MODIFIERS)   return;
 507
 508                 // Get UTF-8/ANSI Encoding
 509                 switch(Codepoint)
 510                 {
 511                 case KEY_LEFT:
 512                         buf[0] = '\x1B';        buf[1] = '[';
 513                         buf[2] = 'D';   len = 3;
 514                         break;
 515                 case KEY_RIGHT:
 516                         buf[0] = '\x1B';        buf[1] = '[';
 517                         buf[2] = 'C';   len = 3;
 518                         break;
 519                 default:
 520                         len = WriteUTF8( buf, Codepoint );
 521                         //Log("Codepoint = 0x%x", Codepoint);
 522                         break;
 523                 }
 524
 525                 //Log("len = %i, buf = %s", len, buf);
 526
 527                 // Write
 528                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 529                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 530                 else {
 531                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 532                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 533                 }
 534                 // Roll the buffer over
 535                 term->InputWrite += len;
 536                 term->InputWrite %= MAX_INPUT_CHARS8;
 537                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 538                         term->InputRead = term->InputWrite + 1;
 539                         term->InputRead %= MAX_INPUT_CHARS8;
 540                 }
 541
 542         }
 543         else
 544         {
 545                 // Encode the raw UTF-32 Key
 546                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 547                 term->InputWrite ++;
 548                 term->InputWrite %= MAX_INPUT_CHARS32;
 549                 if(term->InputRead == term->InputWrite) {
 550                         term->InputRead ++;
 551                         term->InputRead %= MAX_INPUT_CHARS32;
 552                 }
 553         }
 554 }
 555
 556 /**
 557  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 558  * \brief Print a string to the Virtual Terminal
 559  */
 560 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 561 {
 562         Uint32  val;
 563          int    i;
 564         for( i = 0; i < Count; i++ )
 565         {
 566                 if( Buffer[i] == 0x1B ) // Escape Sequence
 567                 {
 568                         i ++;
 569                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 570                         continue;
 571                 }
 572
 573                 if( Buffer[i] < 128 )   // Plain ASCII
 574                         VT_int_PutChar(Term, Buffer[i]);
 575                 else {  // UTF-8
 576                         i += ReadUTF8(&Buffer[i], &val);
 577                         VT_int_PutChar(Term, val);
 578                 }
 579         }
 580
 581         // Update cursor
 582         if( !(Term->Flags & VT_FLAG_HIDECSR) )
 583         {
 584                 tVideo_IOCtl_Pos        pos;
 585                 pos.x = Term->WritePos % Term->Width;
 586                 pos.y = Term->WritePos / Term->Width;
 587                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 588         }
 589 }
 590
 591 /**
 592  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 593  * \brief Clears a line in a virtual terminal
 594  */
 595 void VT_int_ClearLine(tVTerm *Term, int Num)
 596 {
 597          int    i;
 598         //ENTER("pTerm iNum", Term, Num);
 599         for( i = Term->Width; i--; )
 600         {
 601                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 602                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 603         }
 604         //LEAVE('-');
 605 }
 606
 607 /**
 608  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 609  * \brief Parses a VT100 Escape code
 610  */
 611 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 612 {
 613         char    c;
 614          int    argc = 0, j = 1;
 615          int    tmp;
 616          int    args[4] = {0,0,0,0};
 617
 618         switch(Buffer[0]) {
 619         //Large Code
 620         case '[':
 621                 // Get Arguments
 622                 c = Buffer[1];
 623                 do {
 624                         while('0' <= c && c <= '9') {
 625                                 args[argc] *= 10;
 626                                 args[argc] += c-'0';
 627                                 c = Buffer[++j];
 628                         }
 629                         if( j != 1 )    argc ++;
 630                 } while(c == ';');
 631
 632                 // Get string (what does this do?)
 633                 if(c == '"') {
 634                         c = Buffer[++j];
 635                         while(c != '"')
 636                                 c = Buffer[++j];
 637                 }
 638
 639                 // Get Command
 640                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 641                 {
 642                         switch(c)
 643                         {
 644                         // Left
 645                         case 'D':
 646                                 if(argc == 1)   tmp = args[0];
 647                                 else    tmp = 1;
 648
 649                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 650                                         Term->WritePos -= Term->WritePos % Term->Width;
 651                                 else
 652                                         Term->WritePos -= tmp;
 653                                 break;
 654
 655                         // Right
 656                         case 'C':
 657                                 if(argc == 1)   tmp = args[0];
 658                                 else    tmp = 1;
 659                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 660                                         Term->WritePos -= Term->WritePos % Term->Width;
 661                                         Term->WritePos += Term->Width - 1;
 662                                 } else
 663                                         Term->WritePos += tmp;
 664                                 break;
 665
 666                         // Clear By Line
 667                         case 'J':
 668                                 // Clear Screen
 669                                 switch(args[0])
 670                                 {
 671                                 case 2:
 672                                         {
 673                                          int    i = Term->Height * VT_SCROLLBACK;
 674                                         while( i-- )    VT_int_ClearLine(Term, i);
 675                                         Term->WritePos = 0;
 676                                         Term->ViewPos = 0;
 677                                         VT_int_UpdateScreen(Term, 1);
 678                                         }
 679                                         break;
 680                                 }
 681                                 break;
 682                         // Set Font flags
 683                         case 'm':
 684                                 for( ; argc--; )
 685                                 {
 686                                         // Flags
 687                                         if( 0 <= args[argc] && args[argc] <= 8)
 688                                         {
 689                                                 switch(args[argc])
 690                                                 {
 691                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 692                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 693                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 694                                                 }
 695                                         }
 696                                         // Foreground Colour
 697                                         else if(30 <= args[argc] && args[argc] <= 37) {
 698                                                 Term->CurColour &= 0xF000FFFF;
 699                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 700                                         }
 701                                         // Background Colour
 702                                         else if(40 <= args[argc] && args[argc] <= 47) {
 703                                                 Term->CurColour &= 0xFFFF8000;
 704                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 705                                         }
 706                                 }
 707                                 break;
 708                         }
 709                 }
 710                 break;
 711
 712         default:
 713                 break;
 714         }
 715
 716         return j + 1;
 717 }
 718
 719 /**
 720  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 721  * \brief Write a single character to a VTerm
 722  */
 723 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 724 {
 725          int    i;
 726         //ENTER("pTerm xCh", Term, Ch);
 727         //LOG("Term = {WritePos:%i, ViewPos:%i}\n", Term->WritePos, Term->ViewPos);
 728
 729         switch(Ch)
 730         {
 731         case '\0':      return; // Ignore NULL byte
 732         case '\n':
 733                 Term->WritePos += Term->Width;
 734         case '\r':
 735                 Term->WritePos -= Term->WritePos % Term->Width;
 736                 break;
 737
 738         case '\t':
 739                 do {
 740                         Term->Text[ Term->WritePos ].Ch = '\0';
 741                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 742                         Term->WritePos ++;
 743                 } while(Term->WritePos & 7);
 744                 break;
 745
 746         case '\b':
 747                 // Backspace is invalid at Offset 0
 748                 if(Term->WritePos == 0) break;
 749
 750                 Term->WritePos --;
 751                 // Singe Character
 752                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 753                         Term->Text[ Term->WritePos ].Ch = 0;
 754                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 755                         break;
 756                 }
 757                 // Tab
 758                 i = 7;  // Limit it to 8
 759                 do {
 760                         Term->Text[ Term->WritePos ].Ch = 0;
 761                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 762                         Term->WritePos --;
 763                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 764                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 765                         Term->WritePos ++;
 766                 break;
 767
 768         default:
 769                 Term->Text[ Term->WritePos ].Ch = Ch;
 770                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 771                 Term->WritePos ++;
 772                 break;
 773         }
 774
 775
 776         // Move Screen
 777         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 778         {
 779                  int    base, i;
 780                 Term->WritePos -= Term->Width;
 781
 782                 // Update view position
 783                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 784                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 785                 if(Term->ViewPos > base)        Term->ViewPos = base;
 786
 787                 // Scroll terminal cache
 788                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 789
 790                 // Scroll Back
 791                 memcpy(
 792                         Term->Text,
 793                         &Term->Text[Term->Width],
 794                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 795                         );
 796
 797                 // Clear last row
 798                 for( i = 0; i < Term->Width; i ++ )
 799                 {
 800                         Term->Text[ base + i ].Ch = 0;
 801                         Term->Text[ base + i ].Colour = Term->CurColour;
 802                 }
 803
 804                 VT_int_UpdateScreen( Term, 1 );
 805         }
 806         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 807         {
 808                 Term->ViewPos += Term->Width;
 809                 VT_int_UpdateScreen( Term, 1 );
 810         }
 811         else
 812                 VT_int_UpdateScreen( Term, 0 );
 813
 814         //LEAVE('-');
 815 }
 816
 817 /**
 818  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 819  * \brief Updates the video framebuffer
 820  */
 821 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 822 {
 823         // Only update if this is the current terminal
 824         if( Term != &gVT_Terminals[giVT_CurrentTerminal] )      return;
 825
 826         if( Term->Mode == TERM_MODE_TEXT )
 827         {
 828                 if(UpdateAll) {
 829                         VFS_WriteAt(
 830                                 giVT_OutputDevHandle,
 831                                 0,
 832                                 Term->Width*Term->Height*sizeof(tVT_Char),
 833                                 &Term->Text[Term->ViewPos]
 834                                 );
 835                 } else {
 836                          int    pos = Term->WritePos - Term->WritePos % Term->Width;
 837                         VFS_WriteAt(
 838                                 giVT_OutputDevHandle,
 839                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
 840                                 Term->Width*sizeof(tVT_Char),
 841                                 &Term->Text[pos]
 842                                 );
 843                 }
 844         }
 845         else
 846         {
 847                 VFS_WriteAt(
 848                         giVT_OutputDevHandle,
 849                         0,
 850                         Term->Width*Term->Height*sizeof(Uint32),
 851                         &Term->Buffer
 852                         );
 853         }
 854 }
 855
 856 /**
 857  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 858  * \brief Change the mode of a VTerm
 859  */
 860 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 861 {
 862         switch(NewMode)
 863         {
 864         case TERM_MODE_TEXT:
 865                 free(Term->Buffer);
 866                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
 867                 break;
 868         case TERM_MODE_FB:
 869                 free(Term->Text);
 870                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
 871                 break;
 872         case TERM_MODE_OPENGL:
 873                 return;
 874         }
 875
 876         Term->Mode = NewMode;
 877 }
 878
 879 // ---
 880 // Font Render
 881 // ---
 882 #define MONOSPACE_FONT  10816
 883
 884 #if MONOSPACE_FONT == 10808     // 8x8
 885 # include "vterm_font_8x8.h"
 886 #elif MONOSPACE_FONT == 10816   // 8x16
 887 # include "vterm_font_8x16.h"
 888 #endif
 889
 890 // === PROTOTYPES ===
 891 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
 892
 893 // === GLOBALS ===
 894 int     giVT_CharWidth = FONT_WIDTH;
 895 int     giVT_CharHeight = FONT_HEIGHT;
 896
 897 // === CODE ===
 898 /**
 899  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 900  * \brief Render a font character
 901  */
 902 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 903 {
 904         Uint8   *font;
 905         Uint32  *buf = Buffer;
 906          int    x, y;
 907         font = VT_Font_GetChar(Codepoint);
 908
 909         for(y = 0; y < FONT_HEIGHT; y ++)
 910         {
 911                 for(x = 0; x < FONT_WIDTH; x ++)
 912                 {
 913                         if(*font & (1 << (FONT_WIDTH-x)))
 914                                 buf[x] = FGC;
 915                         else
 916                                 buf[x] = BGC;
 917                 }
 918                 buf += Pitch;
 919                 font ++;
 920         }
 921 }
 922
 923 /**
 924  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
 925  * \brief Converts a
 926  */
 927 Uint32 VT_Colour12to24(Uint16 Col12)
 928 {
 929         Uint32  ret;
 930          int    tmp;
 931         tmp = Col12 & 0xF;
 932         ret  = (tmp << 0) | (tmp << 4);
 933         tmp = (Col12 & 0xF0) >> 4;
 934         ret |= (tmp << 8) | (tmp << 12);
 935         tmp = (Col12 & 0xF00) >> 8;
 936         ret |= (tmp << 16) | (tmp << 20);
 937         return ret;
 938 }
 939
 940 /**
 941  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 942  * \brief Gets an index into the font array given a Unicode Codepoint
 943  * \note See http://en.wikipedia.org/wiki/CP437
 944  */
 945 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 946 {
 947          int    index = 0;
 948         if(Codepoint < 128)
 949                 return &VTermFont[Codepoint*FONT_HEIGHT];
 950         switch(Codepoint)
 951         {
 952         case 0xC7:      index = 128;    break;  // Ç
 953         case 0xFC:      index = 129;    break;  // ü
 954         case 0xE9:      index = 130;    break;  // é
 955         case 0xE2:      index = 131;    break;  // â
 956         case 0xE4:      index = 132;    break;  // ä
 957         case 0xE0:      index = 133;    break;  // à
 958         case 0xE5:      index = 134;    break;  // å
 959         case 0xE7:      index = 135;    break;  // ç
 960         case 0xEA:      index = 136;    break;  // ê
 961         case 0xEB:      index = 137;    break;  // ë
 962         case 0xE8:      index = 138;    break;  // è
 963         case 0xEF:      index = 139;    break;  // ï
 964         case 0xEE:      index = 140;    break;  // î
 965         case 0xEC:      index = 141;    break;  // ì
 966         case 0xC4:      index = 142;    break;  // Ä
 967         case 0xC5:      index = 143;    break;  // Å
 968         }
 969
 970         return &VTermFont[index*FONT_HEIGHT];
 971 }
 972
 973 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
 974 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
 975 EXPORT(VT_Font_Render);
 976 EXPORT(VT_Colour12to24);