Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #define DEBUG   1
   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
  13 #define USE_CTRL_ALT    0
  14
  15 // === CONSTANTS ===
  16 #define VERSION ((0<<8)|(50))
  17
  18 #define NUM_VTS 8
  19 #define MAX_INPUT_CHARS32       64
  20 #define MAX_INPUT_CHARS8        (MAX_INPUT_CHARS32*4)
  21 #define VT_SCROLLBACK   2       // 2 Screens of text
  22 //#define DEFAULT_OUTPUT        "VGA"
  23 //#define DEFAULT_OUTPUT        "BochsGA"
  24 #define DEFAULT_OUTPUT  "Vesa"
  25 #define DEFAULT_INPUT   "PS2Keyboard"
  26 #define DEFAULT_WIDTH   80
  27 #define DEFAULT_HEIGHT  25
  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 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         short   Width;  //!< Virtual Width
  44         short   Height; //!< Virtual Height
  45
  46          int    ViewPos;        //!< View Buffer Offset (Text Only)
  47          int    WritePos;       //!< Write Buffer Offset (Text Only)
  48         Uint32  CurColour;      //!< Current Text Colour
  49
  50          int    InputRead;      //!< Input buffer read position
  51          int    InputWrite;     //!< Input buffer write position
  52         char    InputBuffer[MAX_INPUT_CHARS8];
  53         union {
  54                 tVT_Char        *Text;
  55                 Uint32          *Buffer;
  56         };
  57         char    Name[2];        //!< Name of the terminal
  58         tVFS_Node       Node;
  59 } tVTerm;
  60
  61 // === IMPORTS ===
  62 extern void     Debug_SetKTerminal(char *File);
  63
  64 // === PROTOTYPES ===
  65  int    VT_Install(char **Arguments);
  66 void    VT_InitOutput(void);
  67 void    VT_InitInput(void);
  68 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  69 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  70  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  71 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  72 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  73  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  74 void    VT_SetResolution(int IsTextMode, int Width, int Height);
  75 void    VT_SetTerminal(int ID);
  76 void    VT_KBCallBack(Uint32 Codepoint);
  77 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  78  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  79 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  80 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  81 void    VT_int_ChangeMode(tVTerm *Term, int NewMode);
  82
  83 // === CONSTANTS ===
  84 const Uint16    caVT100Colours[] = {
  85                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  86                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  87         };
  88
  89 // === GLOBALS ===
  90 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
  91 tDevFS_Driver   gVT_DrvInfo = {
  92         NULL, "VTerm",
  93         {
  94         .Flags = VFS_FFLAG_DIRECTORY,
  95         .Size = NUM_VTS,
  96         .Inode = -1,
  97         .NumACLs = 0,
  98         .ReadDir = VT_ReadDir,
  99         .FindDir = VT_FindDir,
 100         .IOCtl = VT_Root_IOCtl
 101         }
 102 };
 103 // --- Terminals ---
 104 tVTerm  gVT_Terminals[NUM_VTS];
 105  int    giVT_CurrentTerminal = 0;
 106 tVTerm  *gpVT_CurTerm = &gVT_Terminals[0];
 107 // --- Video State ---
 108 short   giVT_RealWidth; //!< Real Width
 109 short   giVT_RealHeight;        //!< Real Height
 110 // --- Driver Handles ---
 111 char    *gsVT_OutputDevice = NULL;
 112 char    *gsVT_InputDevice = NULL;
 113  int    giVT_OutputDevHandle = -2;
 114  int    giVT_InputDevHandle = -2;
 115 // --- Key States --- (Used for VT Switching/Magic Combos)
 116  int    gbVT_CtrlDown = 0;
 117  int    gbVT_AltDown = 0;
 118  int    gbVT_SysrqDown = 0;
 119
 120 // === CODE ===
 121 /**
 122  * \fn int VT_Install(char **Arguments)
 123  * \brief Installs the Virtual Terminal Driver
 124  */
 125 int VT_Install(char **Arguments)
 126 {
 127         char    **args = Arguments;
 128         char    *arg;
 129          int    i;
 130
 131         // Scan Arguments
 132         if(Arguments)
 133         {
 134                 for( ; (arg = *args); args++ )
 135                 {
 136                         if(arg[0] != '-')       continue;
 137
 138                         switch(arg[1])
 139                         {
 140                         // Set output device
 141                         case 'o':
 142                                 if(args[1] ==  NULL)    break;
 143                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 144                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 145                                 strcpy(gsVT_OutputDevice, args[1]);
 146                                 args ++;
 147                                 break;
 148
 149                         // Set input device
 150                         case 'i':
 151                                 if(args[1] == NULL)     break;
 152                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 153                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 154                                 strcpy(gsVT_InputDevice, args[1]);
 155                                 args ++;
 156                                 break;
 157                         }
 158                 }
 159         }
 160
 161         // Apply Defaults
 162         if(!gsVT_OutputDevice)  gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
 163         if(!gsVT_InputDevice)   gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
 164
 165         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 166         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 167
 168         // Create Nodes
 169         for( i = 0; i < NUM_VTS; i++ )
 170         {
 171                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 172                 gVT_Terminals[i].Flags = 0;
 173                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 174                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 175                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 176                 gVT_Terminals[i].WritePos = 0;
 177                 gVT_Terminals[i].ViewPos = 0;
 178
 179                 gVT_Terminals[i].Buffer = calloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK, sizeof(tVT_Char) );
 180
 181                 gVT_Terminals[i].Name[0] = '0'+i;
 182                 gVT_Terminals[i].Name[1] = '\0';
 183                 gVT_Terminals[i].Node.Inode = i;
 184                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 185                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 186
 187                 gVT_Terminals[i].Node.Read = VT_Read;
 188                 gVT_Terminals[i].Node.Write = VT_Write;
 189                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 190         }
 191
 192         // Add to DevFS
 193         DevFS_AddDevice( &gVT_DrvInfo );
 194
 195         VT_InitOutput();
 196         VT_InitInput();
 197
 198         // Set kernel output to VT0
 199         Debug_SetKTerminal("/Devices/VTerm/0");
 200
 201         Log_Log("VTerm", "Returning %i", MODULE_ERR_OK);
 202         return MODULE_ERR_OK;
 203 }
 204
 205 /**
 206  * \fn void VT_InitOutput()
 207  * \brief Initialise Video Output
 208  */
 209 void VT_InitOutput()
 210 {
 211         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 212         if(giVT_InputDevHandle == -1) {
 213                 Log_Warning("VTerm", "Oh F**k, I can't open the video device '%s'", gsVT_OutputDevice);
 214         }
 215         VT_SetTerminal( 0 );
 216         VT_SetResolution(1, 640, 480);
 217 }
 218
 219 /**
 220  * \fn void VT_InitInput()
 221  * \brief Initialises the input
 222  */
 223 void VT_InitInput()
 224 {
 225         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 226         if(giVT_InputDevHandle == -1)   return ;
 227         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 228 }
 229
 230 /**
 231  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 232  * \brief Read from the VTerm Directory
 233  */
 234 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 235 {
 236         if(Pos < 0)     return NULL;
 237         if(Pos >= NUM_VTS)      return NULL;
 238         return strdup( gVT_Terminals[Pos].Name );
 239 }
 240
 241 /**
 242  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 243  * \brief Find an item in the VTerm directory
 244  */
 245 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 246 {
 247          int    num;
 248
 249         ENTER("pNode sName", Node, Name);
 250
 251         // Open the input and output files if needed
 252         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 253         if(giVT_InputDevHandle == -2)   VT_InitInput();
 254
 255         // Sanity check name
 256         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 257                 LEAVE('n');
 258                 return NULL;
 259         }
 260         // Get index
 261         num = Name[0] - '0';
 262         if(num >= NUM_VTS) {
 263                 LEAVE('n');
 264                 return NULL;
 265         }
 266         // Return node
 267         LEAVE('p', &gVT_Terminals[num].Node);
 268         return &gVT_Terminals[num].Node;
 269 }
 270
 271 /**
 272  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 273  * \brief Control the VTerm Driver
 274  */
 275 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 276 {
 277          int    len;
 278         switch(Id)
 279         {
 280         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 281         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 282         case DRV_IOCTL_VERSION: return VERSION;
 283         case DRV_IOCTL_LOOKUP:  return 0;
 284
 285         case 4: // Get Video Driver
 286                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 287                 return strlen(gsVT_OutputDevice);
 288
 289         case 5: // Set Video Driver
 290                 if(!Data)       return -EINVAL;
 291                 if(Threads_GetUID() != 0)       return -EACCES;
 292
 293                 len = strlen(Data);
 294
 295                 free(gsVT_OutputDevice);
 296
 297                 gsVT_OutputDevice = malloc(len+1);
 298                 strcpy(gsVT_OutputDevice, Data);
 299
 300                 VFS_Close(giVT_OutputDevHandle);
 301                 giVT_OutputDevHandle = -1;
 302
 303                 VT_InitOutput();
 304                 return 1;
 305         }
 306         return 0;
 307 }
 308
 309 /**
 310  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 311  * \brief Read from a virtual terminal
 312  */
 313 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 314 {
 315          int    pos = 0;
 316         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 317
 318         // Check current mode
 319         switch(term->Mode)
 320         {
 321         case TERM_MODE_TEXT:
 322                 while(pos < Length)
 323                 {
 324                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 325
 326                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 327                         pos ++;
 328                         term->InputRead ++;
 329                         term->InputRead %= MAX_INPUT_CHARS8;
 330                 }
 331                 break;
 332
 333         //case TERM_MODE_FB:
 334         default:
 335                 while(pos < Length)
 336                 {
 337                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 338                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 339                         pos ++;
 340                         term->InputRead ++;
 341                         term->InputRead %= MAX_INPUT_CHARS32;
 342                 }
 343                 break;
 344         }
 345         return 0;
 346 }
 347
 348 /**
 349  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 350  * \brief Write to a virtual terminal
 351  */
 352 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 353 {
 354         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 355
 356         // Write
 357         switch( term->Mode )
 358         {
 359         case TERM_MODE_TEXT:
 360                 VT_int_PutString(term, Buffer, Length);
 361                 break;
 362         case TERM_MODE_FB:
 363                 if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
 364                 {
 365                         #if 0
 366                          int    x, y, h;
 367                         x = Offset/4;   y = x / term->Width;    x %= term->Width;
 368                         w = Length/4+x; h = w / term->Width;    w %= term->Width;
 369                         while(h--)
 370                         {
 371                                 VFS_WriteAt( giVT_OutputDevHandle,
 372                                         (x+y*term->RealWidth)*4,
 373                                         term->Width * 4,
 374                                         Buffer
 375                                         );
 376                                 Buffer = (void*)( (Uint)Buffer + term->Width*term->Height*4 );
 377                         }
 378                         #endif
 379                         return 0;
 380                 }
 381                 else {
 382                         return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 383                 }
 384         }
 385
 386         return 0;
 387 }
 388
 389 /**
 390  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 391  * \brief Call an IO Control on a virtual terminal
 392  */
 393 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 394 {
 395          int    *iData = Data;
 396         tVTerm  *term = Node->ImplPtr;
 397         ENTER("pNode iId pData", Node, Id, Data);
 398
 399         if(Id >= DRV_IOCTL_LOOKUP) {
 400                 if( Threads_GetUID() != 0 )     return -1;
 401         }
 402
 403         switch(Id)
 404         {
 405         case DRV_IOCTL_TYPE:
 406                 LEAVE('i', DRV_TYPE_TERMINAL);
 407                 return DRV_TYPE_TERMINAL;
 408         case DRV_IOCTL_IDENT:
 409                 memcpy(Data, "VT\0\0", 4);
 410                 LEAVE('i', 0);
 411                 return 0;
 412         case DRV_IOCTL_VERSION:
 413                 LEAVE('x', VERSION);
 414                 return VERSION;
 415         case DRV_IOCTL_LOOKUP:
 416                 LEAVE('i', 0);
 417                 return 0;
 418
 419         // Get/Set the mode (and apply any changes)
 420         case TERM_IOCTL_MODETYPE:
 421                 if(Data != NULL)
 422                 {
 423                         if(term->Mode != *iData)
 424                                 VT_int_ChangeMode(term, *iData);
 425
 426                         // Update the screen dimensions
 427                         if(giVT_CurrentTerminal == Node->Inode)
 428                                 VT_SetTerminal( giVT_CurrentTerminal );
 429                 }
 430                 LEAVE('i', term->Mode);
 431                 return term->Mode;
 432
 433         // Get/set the terminal width
 434         case TERM_IOCTL_WIDTH:
 435                 if(Data != NULL)        term->Width = *iData;
 436                 Log("VT_Terminal_IOCtl - RETURN term->Width = %i", term->Width);
 437                 LEAVE('i', term->Width);
 438                 return term->Width;
 439
 440         // Get/set the terminal height
 441         case TERM_IOCTL_HEIGHT:
 442                 if(Data != NULL)        term->Height = *iData;
 443                 Log("VT_Terminal_IOCtl - RETURN term->Height = %i", term->Height);
 444                 LEAVE('i', term->Height);
 445                 return term->Height;
 446
 447         case TERM_IOCTL_FORCESHOW:
 448                 VT_SetTerminal( Node->Inode );
 449                 LEAVE('i', 1);
 450                 return 1;
 451         }
 452         LEAVE('i', -1);
 453         return -1;
 454 }
 455
 456 void VT_SetResolution(int IsTextMode, int Width, int Height)
 457 {
 458         tVideo_IOCtl_Mode       mode = {0};
 459          int    tmp;
 460
 461         // Create the video mode
 462         mode.width = Width;
 463         mode.height = Height;
 464         mode.bpp = 32;
 465         mode.flags = 0;
 466
 467         // Set video mode
 468         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 469         tmp = mode.id;
 470         giVT_RealWidth = mode.width;
 471         giVT_RealHeight = mode.height;
 472         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 473
 474         tmp = IsTextMode ? VIDEO_BUFFMT_TEXT : VIDEO_BUFFMT_FRAMEBUFFER;
 475         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp );
 476 }
 477
 478 /**
 479  * \fn void VT_SetTerminal(int ID)
 480  * \brief Set the current terminal
 481  */
 482 void VT_SetTerminal(int ID)
 483 {
 484         // Update current terminal ID
 485         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 486         giVT_CurrentTerminal = ID;
 487         gpVT_CurTerm = &gVT_Terminals[ID];
 488
 489         // Update cursor
 490         if( !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
 491         {
 492                 tVideo_IOCtl_Pos        pos;
 493                 pos.x = gpVT_CurTerm->WritePos % gpVT_CurTerm->Width;
 494                 pos.y = gpVT_CurTerm->WritePos / gpVT_CurTerm->Width;
 495                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 496         }
 497
 498         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 499                 VT_SetResolution( 1, gpVT_CurTerm->Width*giVT_CharWidth, gpVT_CurTerm->Height*giVT_CharHeight );
 500         else
 501                 VT_SetResolution( 0, gpVT_CurTerm->Width, gpVT_CurTerm->Height );
 502
 503         // Update the screen
 504         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 505 }
 506
 507 /**
 508  * \fn void VT_KBCallBack(Uint32 Codepoint)
 509  * \brief Called on keyboard interrupt
 510  * \param Codepoint     Pseudo-UTF32 character
 511  *
 512  * Handles a key press and sends the key code to the user's buffer.
 513  * If the code creates a kernel-magic sequence, it is not passed to the
 514  * user and is handled in-kernel.
 515  */
 516 void VT_KBCallBack(Uint32 Codepoint)
 517 {
 518         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 519
 520         // How the hell did we get a Codepoint of zero?
 521         if(Codepoint == 0)      return;
 522
 523         // Key Up
 524         if( Codepoint & 0x80000000 )
 525         {
 526                 Codepoint &= 0x7FFFFFFF;
 527                 switch(Codepoint)
 528                 {
 529                 #if !USE_CTRL_ALT
 530                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 531                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 532                 #else
 533                 case KEY_LALT:
 534                 case KEY_RALT:
 535                         gbVT_AltDown = 0;
 536                         break;
 537                 case KEY_LCTRL:
 538                 case KEY_RCTRL:
 539                         gbVT_CtrlDown = 0;
 540                         break;
 541                 #endif
 542                 }
 543                 return;
 544         }
 545
 546         switch(Codepoint)
 547         {
 548         #if !USE_CTRL_ALT
 549         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 550         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 551         #else
 552         case KEY_LALT:
 553         case KEY_RALT:
 554                 gbVT_AltDown = 1;
 555                 break;
 556         case KEY_LCTRL:
 557         case KEY_RCTRL:
 558                 gbVT_CtrlDown = 1;
 559                 break;
 560         #endif
 561
 562         default:
 563                 #if USE_CTRL_ALT
 564                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 565                         break;
 566                 #endif
 567                 switch(Codepoint)
 568                 {
 569                 case KEY_F1:    VT_SetTerminal(0);      return;
 570                 case KEY_F2:    VT_SetTerminal(1);      return;
 571                 case KEY_F3:    VT_SetTerminal(2);      return;
 572                 case KEY_F4:    VT_SetTerminal(3);      return;
 573                 case KEY_F5:    VT_SetTerminal(4);      return;
 574                 case KEY_F6:    VT_SetTerminal(5);      return;
 575                 case KEY_F7:    VT_SetTerminal(6);      return;
 576                 case KEY_F8:    VT_SetTerminal(7);      return;
 577                 case KEY_F9:    VT_SetTerminal(8);      return;
 578                 case KEY_F10:   VT_SetTerminal(9);      return;
 579                 case KEY_F11:   VT_SetTerminal(10);     return;
 580                 case KEY_F12:   VT_SetTerminal(11);     return;
 581                 case KEY_PGUP:
 582                         if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
 583                                 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
 584                         else
 585                                 gpVT_CurTerm->ViewPos = 0;
 586                         return;
 587                 case KEY_PGDOWN:
 588                         if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1)) )
 589                                 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
 590                         else
 591                                 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1));
 592                         return;
 593                 }
 594         }
 595
 596         // Encode key
 597         if(term->Mode == TERM_MODE_TEXT)
 598         {
 599                 Uint8   buf[6] = {0};
 600                  int    len = 0;
 601
 602                 // Ignore Modifer Keys
 603                 if(Codepoint > KEY_MODIFIERS)   return;
 604
 605                 // Get UTF-8/ANSI Encoding
 606                 switch(Codepoint)
 607                 {
 608                 case KEY_LEFT:
 609                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 610                         len = 3;
 611                         break;
 612                 case KEY_RIGHT:
 613                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 614                         len = 3;
 615                         break;
 616                 case KEY_UP:
 617                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 618                         len = 3;
 619                         break;
 620                 case KEY_DOWN:
 621                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 622                         len = 3;
 623                         break;
 624
 625                 case KEY_PGUP:
 626                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 627                         //len = 4;      // Commented out until I'm sure
 628                         break;
 629                 case KEY_PGDOWN:
 630                         len = 0;
 631                         break;
 632
 633                 // Attempt to encode in UTF-8
 634                 default:
 635                         len = WriteUTF8( buf, Codepoint );
 636                         if(len == 0) {
 637                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 638                         }
 639                         break;
 640                 }
 641
 642                 if(len == 0) {
 643                         // Unprintable / Don't Pass
 644                         return;
 645                 }
 646
 647                 // Write
 648                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 649                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 650                 else {
 651                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 652                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 653                 }
 654                 // Roll the buffer over
 655                 term->InputWrite += len;
 656                 term->InputWrite %= MAX_INPUT_CHARS8;
 657                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 658                         term->InputRead = term->InputWrite + 1;
 659                         term->InputRead %= MAX_INPUT_CHARS8;
 660                 }
 661
 662         }
 663         else
 664         {
 665                 // Encode the raw UTF-32 Key
 666                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 667                 term->InputWrite ++;
 668                 term->InputWrite %= MAX_INPUT_CHARS32;
 669                 if(term->InputRead == term->InputWrite) {
 670                         term->InputRead ++;
 671                         term->InputRead %= MAX_INPUT_CHARS32;
 672                 }
 673         }
 674 }
 675
 676 /**
 677  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 678  * \brief Print a string to the Virtual Terminal
 679  */
 680 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 681 {
 682         Uint32  val;
 683          int    i;
 684         for( i = 0; i < Count; i++ )
 685         {
 686                 if( Buffer[i] == 0x1B ) // Escape Sequence
 687                 {
 688                         i ++;
 689                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 690                         continue;
 691                 }
 692
 693                 if( Buffer[i] < 128 )   // Plain ASCII
 694                         VT_int_PutChar(Term, Buffer[i]);
 695                 else {  // UTF-8
 696                         i += ReadUTF8(&Buffer[i], &val);
 697                         VT_int_PutChar(Term, val);
 698                 }
 699         }
 700
 701         // Update cursor
 702         if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
 703         {
 704                 tVideo_IOCtl_Pos        pos;
 705                 pos.x = Term->WritePos % Term->Width;
 706                 pos.y = Term->WritePos / Term->Width;
 707                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 708         }
 709 }
 710
 711 /**
 712  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 713  * \brief Clears a line in a virtual terminal
 714  */
 715 void VT_int_ClearLine(tVTerm *Term, int Num)
 716 {
 717          int    i;
 718         //ENTER("pTerm iNum", Term, Num);
 719         for( i = Term->Width; i--; )
 720         {
 721                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 722                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 723         }
 724         //LEAVE('-');
 725 }
 726
 727 /**
 728  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 729  * \brief Parses a VT100 Escape code
 730  */
 731 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 732 {
 733         char    c;
 734          int    argc = 0, j = 1;
 735          int    tmp;
 736          int    args[4] = {0,0,0,0};
 737
 738         switch(Buffer[0]) {
 739         //Large Code
 740         case '[':
 741                 // Get Arguments
 742                 c = Buffer[1];
 743                 do {
 744                         while('0' <= c && c <= '9') {
 745                                 args[argc] *= 10;
 746                                 args[argc] += c-'0';
 747                                 c = Buffer[++j];
 748                         }
 749                         if( j != 1 )    argc ++;
 750                 } while(c == ';');
 751
 752                 // Get string (what does this do?)
 753                 if(c == '"') {
 754                         c = Buffer[++j];
 755                         while(c != '"')
 756                                 c = Buffer[++j];
 757                 }
 758
 759                 // Get Command
 760                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 761                 {
 762                         switch(c)
 763                         {
 764                         // Left
 765                         case 'D':
 766                                 if(argc == 1)   tmp = args[0];
 767                                 else    tmp = 1;
 768
 769                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 770                                         Term->WritePos -= Term->WritePos % Term->Width;
 771                                 else
 772                                         Term->WritePos -= tmp;
 773                                 break;
 774
 775                         // Right
 776                         case 'C':
 777                                 if(argc == 1)   tmp = args[0];
 778                                 else    tmp = 1;
 779                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 780                                         Term->WritePos -= Term->WritePos % Term->Width;
 781                                         Term->WritePos += Term->Width - 1;
 782                                 } else
 783                                         Term->WritePos += tmp;
 784                                 break;
 785
 786                         // Clear By Line
 787                         case 'J':
 788                                 // Clear Screen
 789                                 switch(args[0])
 790                                 {
 791                                 case 2:
 792                                         {
 793                                          int    i = Term->Height * VT_SCROLLBACK;
 794                                         while( i-- )    VT_int_ClearLine(Term, i);
 795                                         Term->WritePos = 0;
 796                                         Term->ViewPos = 0;
 797                                         VT_int_UpdateScreen(Term, 1);
 798                                         }
 799                                         break;
 800                                 }
 801                                 break;
 802                         // Set Font flags
 803                         case 'm':
 804                                 for( ; argc--; )
 805                                 {
 806                                         // Flags
 807                                         if( 0 <= args[argc] && args[argc] <= 8)
 808                                         {
 809                                                 switch(args[argc])
 810                                                 {
 811                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 812                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 813                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 814                                                 }
 815                                         }
 816                                         // Foreground Colour
 817                                         else if(30 <= args[argc] && args[argc] <= 37) {
 818                                                 Term->CurColour &= 0xF000FFFF;
 819                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 820                                         }
 821                                         // Background Colour
 822                                         else if(40 <= args[argc] && args[argc] <= 47) {
 823                                                 Term->CurColour &= 0xFFFF8000;
 824                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 825                                         }
 826                                 }
 827                                 break;
 828                         }
 829                 }
 830                 break;
 831
 832         default:
 833                 break;
 834         }
 835
 836         return j + 1;
 837 }
 838
 839 /**
 840  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 841  * \brief Write a single character to a VTerm
 842  */
 843 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 844 {
 845          int    i;
 846         //ENTER("pTerm xCh", Term, Ch);
 847         //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
 848
 849         switch(Ch)
 850         {
 851         case '\0':      return; // Ignore NULL byte
 852         case '\n':
 853                 Term->WritePos += Term->Width;
 854         case '\r':
 855                 Term->WritePos -= Term->WritePos % Term->Width;
 856                 break;
 857
 858         case '\t':
 859                 do {
 860                         Term->Text[ Term->WritePos ].Ch = '\0';
 861                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 862                         Term->WritePos ++;
 863                 } while(Term->WritePos & 7);
 864                 break;
 865
 866         case '\b':
 867                 // Backspace is invalid at Offset 0
 868                 if(Term->WritePos == 0) break;
 869
 870                 Term->WritePos --;
 871                 // Singe Character
 872                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 873                         Term->Text[ Term->WritePos ].Ch = 0;
 874                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 875                         break;
 876                 }
 877                 // Tab
 878                 i = 7;  // Limit it to 8
 879                 do {
 880                         Term->Text[ Term->WritePos ].Ch = 0;
 881                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 882                         Term->WritePos --;
 883                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 884                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 885                         Term->WritePos ++;
 886                 break;
 887
 888         default:
 889                 Term->Text[ Term->WritePos ].Ch = Ch;
 890                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 891                 Term->WritePos ++;
 892                 break;
 893         }
 894
 895
 896         // Move Screen
 897         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 898         {
 899                  int    base, i;
 900                 Term->WritePos -= Term->Width;
 901
 902                 // Update view position
 903                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 904                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 905                 if(Term->ViewPos > base)        Term->ViewPos = base;
 906
 907                 // Scroll terminal cache
 908                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 909
 910                 // Scroll Back
 911                 memcpy(
 912                         Term->Text,
 913                         &Term->Text[Term->Width],
 914                         (Term->Width*Term->Height*VT_SCROLLBACK-Term->Width)*sizeof(tVT_Char)
 915                         );
 916
 917                 // Clear last row
 918                 for( i = 0; i < Term->Width; i ++ )
 919                 {
 920                         Term->Text[ base + i ].Ch = 0;
 921                         Term->Text[ base + i ].Colour = Term->CurColour;
 922                 }
 923
 924                 //LOG("Scrolled buffer");
 925                 VT_int_UpdateScreen( Term, 1 );
 926         }
 927         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 928         {
 929                 Term->ViewPos += Term->Width;
 930                 //LOG("Scrolled screen");
 931                 VT_int_UpdateScreen( Term, 1 );
 932         }
 933         else
 934                 VT_int_UpdateScreen( Term, 0 );
 935
 936         //LEAVE('-');
 937 }
 938
 939 /**
 940  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 941  * \brief Updates the video framebuffer
 942  */
 943 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 944 {
 945         // Only update if this is the current terminal
 946         if( Term != &gVT_Terminals[giVT_CurrentTerminal] )      return;
 947
 948         if( Term->Mode == TERM_MODE_TEXT )
 949         {
 950                 if(UpdateAll) {
 951                         //LOG("UpdateAll = 1");
 952                         //LOG("VFS_WriteAt(0x%x, 0, %i*sizeof(tVT_Char), &Term->Text[%i])",
 953                         //      giVT_OutputDevHandle, Term->Width*Term->Height, Term->ViewPos);
 954                         VFS_WriteAt(
 955                                 giVT_OutputDevHandle,
 956                                 0,
 957                                 Term->Width*Term->Height*sizeof(tVT_Char),
 958                                 &Term->Text[Term->ViewPos]
 959                                 );
 960                 } else {
 961                          int    pos = Term->WritePos - Term->WritePos % Term->Width;
 962                         //LOG("UpdateAll = 0");
 963                         //LOG("VFS_WriteAt(0x%x, %i*sizeof(tVT_Char), %i*sizeof(tVT_Char), &Term->Text[%i])",
 964                         //      giVT_OutputDevHandle, (pos - Term->ViewPos), Term->Width, pos);
 965                         VFS_WriteAt(
 966                                 giVT_OutputDevHandle,
 967                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
 968                                 Term->Width*sizeof(tVT_Char),
 969                                 &Term->Text[pos]
 970                                 );
 971                 }
 972         }
 973         else
 974         {
 975                 VFS_WriteAt(
 976                         giVT_OutputDevHandle,
 977                         0,
 978                         Term->Width*Term->Height*sizeof(Uint32),
 979                         &Term->Buffer
 980                         );
 981         }
 982 }
 983
 984 /**
 985  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 986  * \brief Change the mode of a VTerm
 987  */
 988 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 989 {
 990         switch(NewMode)
 991         {
 992         case TERM_MODE_TEXT:
 993                 free(Term->Buffer);
 994                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
 995                 break;
 996         case TERM_MODE_FB:
 997                 free(Term->Text);
 998                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
 999                 break;
1000         //case TERM_MODE_OPENGL:
1001         //      return;
1002         }
1003
1004         Term->Mode = NewMode;
1005 }
1006
1007 // ---
1008 // Font Render
1009 // ---
1010 #define MONOSPACE_FONT  10816
1011
1012 #if MONOSPACE_FONT == 10808     // 8x8
1013 # include "vterm_font_8x8.h"
1014 #elif MONOSPACE_FONT == 10816   // 8x16
1015 # include "vterm_font_8x16.h"
1016 #endif
1017
1018 // === PROTOTYPES ===
1019 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
1020
1021 // === GLOBALS ===
1022 int     giVT_CharWidth = FONT_WIDTH;
1023 int     giVT_CharHeight = FONT_HEIGHT;
1024
1025 // === CODE ===
1026 /**
1027  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1028  * \brief Render a font character
1029  */
1030 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1031 {
1032         Uint8   *font;
1033         Uint32  *buf = Buffer;
1034          int    x, y;
1035
1036         font = VT_Font_GetChar(Codepoint);
1037
1038         for(y = 0; y < FONT_HEIGHT; y ++)
1039         {
1040                 for(x = 0; x < FONT_WIDTH; x ++)
1041                 {
1042                         if(*font & (1 << (FONT_WIDTH-x-1)))
1043                                 buf[x] = FGC;
1044                         else
1045                                 buf[x] = BGC;
1046                 }
1047                 buf += Pitch;
1048                 font ++;
1049         }
1050 }
1051
1052 /**
1053  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1054  * \brief Converts a
1055  */
1056 Uint32 VT_Colour12to24(Uint16 Col12)
1057 {
1058         Uint32  ret;
1059          int    tmp;
1060         tmp = Col12 & 0xF;
1061         ret  = (tmp << 0) | (tmp << 4);
1062         tmp = (Col12 & 0xF0) >> 4;
1063         ret |= (tmp << 8) | (tmp << 12);
1064         tmp = (Col12 & 0xF00) >> 8;
1065         ret |= (tmp << 16) | (tmp << 20);
1066         return ret;
1067 }
1068
1069 /**
1070  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1071  * \brief Gets an index into the font array given a Unicode Codepoint
1072  * \note See http://en.wikipedia.org/wiki/CP437
1073  */
1074 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1075 {
1076          int    index = 0;
1077         if(Codepoint < 128)
1078                 return &VTermFont[Codepoint*FONT_HEIGHT];
1079         switch(Codepoint)
1080         {
1081         case 0xC7:      index = 128;    break;  // Ç
1082         case 0xFC:      index = 129;    break;  // ü
1083         case 0xE9:      index = 130;    break;  // é
1084         case 0xE2:      index = 131;    break;  // â
1085         case 0xE4:      index = 132;    break;  // ä
1086         case 0xE0:      index = 133;    break;  // à
1087         case 0xE5:      index = 134;    break;  // å
1088         case 0xE7:      index = 135;    break;  // ç
1089         case 0xEA:      index = 136;    break;  // ê
1090         case 0xEB:      index = 137;    break;  // ë
1091         case 0xE8:      index = 138;    break;  // è
1092         case 0xEF:      index = 139;    break;  // ï
1093         case 0xEE:      index = 140;    break;  // î
1094         case 0xEC:      index = 141;    break;  // ì
1095         case 0xC4:      index = 142;    break;  // Ä
1096         case 0xC5:      index = 143;    break;  // Å
1097         }
1098
1099         return &VTermFont[index*FONT_HEIGHT];
1100 }
1101
1102 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1103 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1104 EXPORT(VT_Font_Render);
1105 EXPORT(VT_Colour12to24);