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 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  67 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  68  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  69 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  70 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  71  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  72 void    VT_SetTerminal(int ID);
  73 void    VT_KBCallBack(Uint32 Codepoint);
  74 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  75  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  76 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  77 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  78 void    VT_int_ChangeMode(tVTerm *Term, int NewMode);
  79
  80 // === CONSTANTS ===
  81 const Uint16    caVT100Colours[] = {
  82                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  83                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  84         };
  85
  86 // === GLOBALS ===
  87 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
  88 tDevFS_Driver   gVT_DrvInfo = {
  89         NULL, "VTerm",
  90         {
  91         .Flags = VFS_FFLAG_DIRECTORY,
  92         .Size = NUM_VTS,
  93         .Inode = -1,
  94         .NumACLs = 0,
  95         .ReadDir = VT_ReadDir,
  96         .FindDir = VT_FindDir,
  97         .IOCtl = VT_Root_IOCtl
  98         }
  99 };
 100 // --- Terminals ---
 101 tVTerm  gVT_Terminals[NUM_VTS];
 102  int    giVT_CurrentTerminal = 0;
 103 tVTerm  *gpVT_CurTerm = &gVT_Terminals[0];
 104 // --- Video State ---
 105 short   giVT_RealWidth; //!< Real Width
 106 short   giVT_RealHeight;        //!< Real Height
 107  int    gbVT_TextMode = 1;
 108 // --- Driver Handles ---
 109 char    *gsVT_OutputDevice = NULL;
 110 char    *gsVT_InputDevice = NULL;
 111  int    giVT_OutputDevHandle = -2;
 112  int    giVT_InputDevHandle = -2;
 113 // --- Key States --- (Used for VT Switching/Magic Combos)
 114  int    gbVT_CtrlDown = 0;
 115  int    gbVT_AltDown = 0;
 116  int    gbVT_SysrqDown = 0;
 117
 118 // === CODE ===
 119 /**
 120  * \fn int VT_Install(char **Arguments)
 121  * \brief Installs the Virtual Terminal Driver
 122  */
 123 int VT_Install(char **Arguments)
 124 {
 125         char    **args = Arguments;
 126         char    *arg;
 127          int    i;
 128
 129         // Scan Arguments
 130         if(Arguments)
 131         {
 132                 for( ; (arg = *args); args++ )
 133                 {
 134                         if(arg[0] != '-')       continue;
 135
 136                         switch(arg[1])
 137                         {
 138                         // Set output device
 139                         case 'o':
 140                                 if(args[1] ==  NULL)    break;
 141                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 142                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 143                                 strcpy(gsVT_OutputDevice, args[1]);
 144                                 args ++;
 145                                 break;
 146
 147                         // Set input device
 148                         case 'i':
 149                                 if(args[1] == NULL)     break;
 150                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 151                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 152                                 strcpy(gsVT_InputDevice, args[1]);
 153                                 args ++;
 154                                 break;
 155
 156                         }
 157                 }
 158         }
 159
 160         // Apply Defaults
 161         if(!gsVT_OutputDevice)  gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
 162         if(!gsVT_InputDevice)   gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
 163
 164         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 165         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 166
 167         // Create Nodes
 168         for( i = 0; i < NUM_VTS; i++ )
 169         {
 170                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 171                 gVT_Terminals[i].Flags = 0;
 172                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 173                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 174                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 175                 gVT_Terminals[i].WritePos = 0;
 176                 gVT_Terminals[i].ViewPos = 0;
 177
 178                 gVT_Terminals[i].Buffer = calloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK, sizeof(tVT_Char) );
 179
 180                 gVT_Terminals[i].Name[0] = '0'+i;
 181                 gVT_Terminals[i].Name[1] = '\0';
 182                 gVT_Terminals[i].Node.Inode = i;
 183                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 184                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 185
 186                 gVT_Terminals[i].Node.Read = VT_Read;
 187                 gVT_Terminals[i].Node.Write = VT_Write;
 188                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 189         }
 190
 191         // Add to DevFS
 192         DevFS_AddDevice( &gVT_DrvInfo );
 193
 194         // Set kernel output to VT0
 195         Debug_SetKTerminal("/Devices/VTerm/0");
 196
 197         return MODULE_ERR_OK;
 198 }
 199
 200 /**
 201  * \fn void VT_InitOutput()
 202  * \brief Initialise Video Output
 203  */
 204 void VT_InitOutput()
 205 {
 206         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 207         VT_SetTerminal( 0 );
 208 }
 209
 210 /**
 211  * \fn void VT_InitInput()
 212  * \brief Initialises the input
 213  */
 214 void VT_InitInput()
 215 {
 216         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 217         if(giVT_InputDevHandle == -1)   return ;
 218         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 219 }
 220
 221 /**
 222  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 223  * \brief Read from the VTerm Directory
 224  */
 225 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 226 {
 227         if(Pos < 0)     return NULL;
 228         if(Pos >= NUM_VTS)      return NULL;
 229         return strdup( gVT_Terminals[Pos].Name );
 230 }
 231
 232 /**
 233  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 234  * \brief Find an item in the VTerm directory
 235  */
 236 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 237 {
 238          int    num;
 239
 240         //ENTER("pNode sName", Node, Name);
 241
 242         // Open the input and output files if needed
 243         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 244         if(giVT_InputDevHandle == -2)   VT_InitInput();
 245
 246         // Sanity check name
 247         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 248                 LEAVE('n');
 249                 return NULL;
 250         }
 251         // Get index
 252         num = Name[0] - '0';
 253         if(num >= NUM_VTS) {
 254                 LEAVE('n');
 255                 return NULL;
 256         }
 257         // Return node
 258         //LEAVE('p', &gVT_Terminals[num].Node);
 259         return &gVT_Terminals[num].Node;
 260 }
 261
 262 /**
 263  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 264  * \brief Control the VTerm Driver
 265  */
 266 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 267 {
 268          int    len;
 269         switch(Id)
 270         {
 271         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 272         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 273         case DRV_IOCTL_VERSION: return VERSION;
 274         case DRV_IOCTL_LOOKUP:  return 0;
 275
 276         case 4: // Get Video Driver
 277                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 278                 return strlen(gsVT_OutputDevice);
 279
 280         case 5: // Set Video Driver
 281                 if(!Data)       return -EINVAL;
 282                 if(Threads_GetUID() != 0)       return -EACCES;
 283
 284                 len = strlen(Data);
 285
 286                 free(gsVT_OutputDevice);
 287
 288                 gsVT_OutputDevice = malloc(len+1);
 289                 strcpy(gsVT_OutputDevice, Data);
 290
 291                 VFS_Close(giVT_OutputDevHandle);
 292                 giVT_OutputDevHandle = -1;
 293
 294                 VT_InitOutput();
 295                 return 1;
 296         }
 297         return 0;
 298 }
 299
 300 /**
 301  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 302  * \brief Read from a virtual terminal
 303  */
 304 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 305 {
 306          int    pos = 0;
 307         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 308
 309         // Check current mode
 310         switch(term->Mode)
 311         {
 312         case TERM_MODE_TEXT:
 313                 while(pos < Length)
 314                 {
 315                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 316
 317                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 318                         pos ++;
 319                         term->InputRead ++;
 320                         term->InputRead %= MAX_INPUT_CHARS8;
 321                 }
 322                 break;
 323
 324         case TERM_MODE_FB:
 325         //case TERM_MODE_:
 326                 while(pos < Length)
 327                 {
 328                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 329                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 330                         pos ++;
 331                         term->InputRead ++;
 332                         term->InputRead %= MAX_INPUT_CHARS32;
 333                 }
 334                 break;
 335         }
 336         return 0;
 337 }
 338
 339 /**
 340  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 341  * \brief Write to a virtual terminal
 342  */
 343 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 344 {
 345         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 346
 347         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 348
 349         // Write
 350         switch( term->Mode )
 351         {
 352         case TERM_MODE_TEXT:
 353                 VT_int_PutString(term, Buffer, Length);
 354                 break;
 355         case TERM_MODE_FB:
 356                 if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
 357                 {
 358                         #if 0
 359                          int    x, y, h;
 360                         x = Offset/4;   y = x / term->Width;    x %= term->Width;
 361                         w = Length/4+x; h = w / term->Width;    w %= term->Width;
 362                         while(h--)
 363                         {
 364                                 VFS_WriteAt( giVT_OutputDevHandle,
 365                                         (x+y*term->RealWidth)*4,
 366                                         term->Width * 4,
 367                                         Buffer
 368                                         );
 369                                 Buffer = (void*)( (Uint)Buffer + term->Width*term->Height*4 );
 370                         }
 371                         #endif
 372                         return 0;
 373                 }
 374                 else {
 375                         return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 376                 }
 377         }
 378
 379         //LEAVE('i', 0);
 380         return 0;
 381 }
 382
 383 /**
 384  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 385  * \brief Call an IO Control on a virtual terminal
 386  */
 387 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 388 {
 389          int    *iData = Data;
 390         tVTerm  *term = Node->ImplPtr;
 391         ENTER("pNode iId pData", Node, Id, Data);
 392
 393         if(Id >= DRV_IOCTL_LOOKUP) {
 394                 if( Threads_GetUID() != 0 )     return -1;
 395         }
 396
 397         switch(Id)
 398         {
 399         case DRV_IOCTL_TYPE:
 400                 LEAVE('i', DRV_TYPE_TERMINAL);
 401                 return DRV_TYPE_TERMINAL;
 402         case DRV_IOCTL_IDENT:
 403                 memcpy(Data, "VT\0\0", 4);
 404                 LEAVE('i', 0);
 405                 return 0;
 406         case DRV_IOCTL_VERSION:
 407                 LEAVE('x', VERSION);
 408                 return VERSION;
 409         case DRV_IOCTL_LOOKUP:
 410                 LEAVE('i', 0);
 411                 return 0;
 412
 413         // Get/Set the mode (and apply any changes)
 414         case TERM_IOCTL_MODETYPE:
 415                 if(Data != NULL)
 416                 {
 417                         if(term->Mode != *iData)
 418                                 VT_int_ChangeMode(term, *iData);
 419
 420                         // Update the screen dimensions
 421                         if(giVT_CurrentTerminal == Node->Inode)
 422                                 VT_SetTerminal( giVT_CurrentTerminal );
 423                 }
 424                 LEAVE('i', term->Mode);
 425                 return term->Mode;
 426
 427         // Get/set the terminal width
 428         case TERM_IOCTL_WIDTH:
 429                 if(Data != NULL)        term->Width = *iData;
 430                 Log("VT_Terminal_IOCtl - RETURN term->Width = %i", term->Width);
 431                 LEAVE('i', term->Width);
 432                 return term->Width;
 433
 434         // Get/set the terminal height
 435         case TERM_IOCTL_HEIGHT:
 436                 if(Data != NULL)        term->Height = *iData;
 437                 Log("VT_Terminal_IOCtl - RETURN term->Height = %i", term->Height);
 438                 LEAVE('i', term->Height);
 439                 return term->Height;
 440
 441         case TERM_IOCTL_FORCESHOW:
 442                 VT_SetTerminal( Node->Inode );
 443                 LEAVE('i', 1);
 444                 return 1;
 445         }
 446         LEAVE('i', -1);
 447         return -1;
 448 }
 449
 450 void VT_SetResolution(int IsTextMode, int Width, int Height)
 451 {
 452         tVideo_IOCtl_Mode       mode = {0};
 453          int    tmp;
 454
 455         // Create the video mode
 456         mode.width = Width;
 457         mode.height = Height;
 458         mode.bpp = 32;
 459         mode.flags = 0;
 460
 461         // Set video mode
 462         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 463         tmp = mode.id;
 464         giVT_RealWidth = mode.width;
 465         giVT_RealHeight = mode.height;
 466         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 467
 468
 469
 470         if(IsTextMode)
 471                 tmp = VIDEO_BUFFMT_TEXT;
 472         else
 473                 tmp = VIDEO_BUFFMT_FRAMEBUFFER;
 474         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp );
 475 }
 476
 477 /**
 478  * \fn void VT_SetTerminal(int ID)
 479  * \brief Set the current terminal
 480  */
 481 void VT_SetTerminal(int ID)
 482 {
 483         // Update current terminal ID
 484         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 485         giVT_CurrentTerminal = ID;
 486         gpVT_CurTerm = &gVT_Terminals[ID];
 487
 488         // Update cursor
 489         if( !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
 490         {
 491                 tVideo_IOCtl_Pos        pos;
 492                 pos.x = gpVT_CurTerm->WritePos % gpVT_CurTerm->Width;
 493                 pos.y = gpVT_CurTerm->WritePos / gpVT_CurTerm->Width;
 494                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 495         }
 496
 497         // Update the screen
 498         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 499 }
 500
 501 /**
 502  * \fn void VT_KBCallBack(Uint32 Codepoint)
 503  * \brief Called on keyboard interrupt
 504  * \param Codepoint     Pseudo-UTF32 character
 505  *
 506  * Handles a key press and sends the key code to the user's buffer.
 507  * If the code creates a kernel-magic sequence, it is not passed to the
 508  * user and is handled in-kernel.
 509  */
 510 void VT_KBCallBack(Uint32 Codepoint)
 511 {
 512         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 513
 514         // How the hell did we get a Codepoint of zero?
 515         if(Codepoint == 0)      return;
 516
 517         // Key Up
 518         if( Codepoint & 0x80000000 )
 519         {
 520                 Codepoint &= 0x7FFFFFFF;
 521                 switch(Codepoint)
 522                 {
 523                 #if !USE_CTRL_ALT
 524                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 525                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 526                 #else
 527                 case KEY_LALT:
 528                 case KEY_RALT:
 529                         gbVT_AltDown = 0;
 530                         break;
 531                 case KEY_LCTRL:
 532                 case KEY_RCTRL:
 533                         gbVT_CtrlDown = 0;
 534                         break;
 535                 #endif
 536                 }
 537                 return;
 538         }
 539
 540         switch(Codepoint)
 541         {
 542         #if !USE_CTRL_ALT
 543         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 544         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 545         #else
 546         case KEY_LALT:
 547         case KEY_RALT:
 548                 gbVT_AltDown = 1;
 549                 break;
 550         case KEY_LCTRL:
 551         case KEY_RCTRL:
 552                 gbVT_CtrlDown = 1;
 553                 break;
 554         #endif
 555
 556         default:
 557                 #if USE_CTRL_ALT
 558                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 559                         break;
 560                 #endif
 561                 switch(Codepoint)
 562                 {
 563                 case KEY_F1:    VT_SetTerminal(0);      return;
 564                 case KEY_F2:    VT_SetTerminal(1);      return;
 565                 case KEY_F3:    VT_SetTerminal(2);      return;
 566                 case KEY_F4:    VT_SetTerminal(3);      return;
 567                 case KEY_F5:    VT_SetTerminal(4);      return;
 568                 case KEY_F6:    VT_SetTerminal(5);      return;
 569                 case KEY_F7:    VT_SetTerminal(6);      return;
 570                 case KEY_F8:    VT_SetTerminal(7);      return;
 571                 case KEY_F9:    VT_SetTerminal(8);      return;
 572                 case KEY_F10:   VT_SetTerminal(9);      return;
 573                 case KEY_F11:   VT_SetTerminal(10);     return;
 574                 case KEY_F12:   VT_SetTerminal(11);     return;
 575                 case KEY_PGUP:
 576                         if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
 577                                 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
 578                         else
 579                                 gpVT_CurTerm->ViewPos = 0;
 580                         return;
 581                 case KEY_PGDOWN:
 582                         if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1)) )
 583                                 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
 584                         else
 585                                 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1));
 586                         return;
 587                 }
 588         }
 589
 590         // Encode key
 591         if(term->Mode == TERM_MODE_TEXT)
 592         {
 593                 Uint8   buf[6] = {0};
 594                  int    len = 0;
 595
 596                 // Ignore Modifer Keys
 597                 if(Codepoint > KEY_MODIFIERS)   return;
 598
 599                 // Get UTF-8/ANSI Encoding
 600                 switch(Codepoint)
 601                 {
 602                 case KEY_LEFT:
 603                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 604                         len = 3;
 605                         break;
 606                 case KEY_RIGHT:
 607                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 608                         len = 3;
 609                         break;
 610                 case KEY_UP:
 611                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 612                         len = 3;
 613                         break;
 614                 case KEY_DOWN:
 615                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 616                         len = 3;
 617                         break;
 618
 619                 case KEY_PGUP:
 620                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 621                         //len = 4;      // Commented out until I'm sure
 622                         break;
 623                 case KEY_PGDOWN:
 624                         len = 0;
 625                         break;
 626
 627                 // Attempt to encode in UTF-8
 628                 default:
 629                         len = WriteUTF8( buf, Codepoint );
 630                         if(len == 0) {
 631                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 632                         }
 633                         break;
 634                 }
 635
 636                 if(len == 0) {
 637                         // Unprintable / Don't Pass
 638                         return;
 639                 }
 640
 641                 // Write
 642                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 643                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 644                 else {
 645                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 646                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 647                 }
 648                 // Roll the buffer over
 649                 term->InputWrite += len;
 650                 term->InputWrite %= MAX_INPUT_CHARS8;
 651                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 652                         term->InputRead = term->InputWrite + 1;
 653                         term->InputRead %= MAX_INPUT_CHARS8;
 654                 }
 655
 656         }
 657         else
 658         {
 659                 // Encode the raw UTF-32 Key
 660                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 661                 term->InputWrite ++;
 662                 term->InputWrite %= MAX_INPUT_CHARS32;
 663                 if(term->InputRead == term->InputWrite) {
 664                         term->InputRead ++;
 665                         term->InputRead %= MAX_INPUT_CHARS32;
 666                 }
 667         }
 668 }
 669
 670 /**
 671  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 672  * \brief Print a string to the Virtual Terminal
 673  */
 674 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 675 {
 676         Uint32  val;
 677          int    i;
 678         for( i = 0; i < Count; i++ )
 679         {
 680                 if( Buffer[i] == 0x1B ) // Escape Sequence
 681                 {
 682                         i ++;
 683                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 684                         continue;
 685                 }
 686
 687                 if( Buffer[i] < 128 )   // Plain ASCII
 688                         VT_int_PutChar(Term, Buffer[i]);
 689                 else {  // UTF-8
 690                         i += ReadUTF8(&Buffer[i], &val);
 691                         VT_int_PutChar(Term, val);
 692                 }
 693         }
 694
 695         // Update cursor
 696         if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
 697         {
 698                 tVideo_IOCtl_Pos        pos;
 699                 pos.x = Term->WritePos % Term->Width;
 700                 pos.y = Term->WritePos / Term->Width;
 701                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 702         }
 703 }
 704
 705 /**
 706  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 707  * \brief Clears a line in a virtual terminal
 708  */
 709 void VT_int_ClearLine(tVTerm *Term, int Num)
 710 {
 711          int    i;
 712         //ENTER("pTerm iNum", Term, Num);
 713         for( i = Term->Width; i--; )
 714         {
 715                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 716                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 717         }
 718         //LEAVE('-');
 719 }
 720
 721 /**
 722  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 723  * \brief Parses a VT100 Escape code
 724  */
 725 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 726 {
 727         char    c;
 728          int    argc = 0, j = 1;
 729          int    tmp;
 730          int    args[4] = {0,0,0,0};
 731
 732         switch(Buffer[0]) {
 733         //Large Code
 734         case '[':
 735                 // Get Arguments
 736                 c = Buffer[1];
 737                 do {
 738                         while('0' <= c && c <= '9') {
 739                                 args[argc] *= 10;
 740                                 args[argc] += c-'0';
 741                                 c = Buffer[++j];
 742                         }
 743                         if( j != 1 )    argc ++;
 744                 } while(c == ';');
 745
 746                 // Get string (what does this do?)
 747                 if(c == '"') {
 748                         c = Buffer[++j];
 749                         while(c != '"')
 750                                 c = Buffer[++j];
 751                 }
 752
 753                 // Get Command
 754                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 755                 {
 756                         switch(c)
 757                         {
 758                         // Left
 759                         case 'D':
 760                                 if(argc == 1)   tmp = args[0];
 761                                 else    tmp = 1;
 762
 763                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 764                                         Term->WritePos -= Term->WritePos % Term->Width;
 765                                 else
 766                                         Term->WritePos -= tmp;
 767                                 break;
 768
 769                         // Right
 770                         case 'C':
 771                                 if(argc == 1)   tmp = args[0];
 772                                 else    tmp = 1;
 773                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 774                                         Term->WritePos -= Term->WritePos % Term->Width;
 775                                         Term->WritePos += Term->Width - 1;
 776                                 } else
 777                                         Term->WritePos += tmp;
 778                                 break;
 779
 780                         // Clear By Line
 781                         case 'J':
 782                                 // Clear Screen
 783                                 switch(args[0])
 784                                 {
 785                                 case 2:
 786                                         {
 787                                          int    i = Term->Height * VT_SCROLLBACK;
 788                                         while( i-- )    VT_int_ClearLine(Term, i);
 789                                         Term->WritePos = 0;
 790                                         Term->ViewPos = 0;
 791                                         VT_int_UpdateScreen(Term, 1);
 792                                         }
 793                                         break;
 794                                 }
 795                                 break;
 796                         // Set Font flags
 797                         case 'm':
 798                                 for( ; argc--; )
 799                                 {
 800                                         // Flags
 801                                         if( 0 <= args[argc] && args[argc] <= 8)
 802                                         {
 803                                                 switch(args[argc])
 804                                                 {
 805                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 806                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 807                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 808                                                 }
 809                                         }
 810                                         // Foreground Colour
 811                                         else if(30 <= args[argc] && args[argc] <= 37) {
 812                                                 Term->CurColour &= 0xF000FFFF;
 813                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 814                                         }
 815                                         // Background Colour
 816                                         else if(40 <= args[argc] && args[argc] <= 47) {
 817                                                 Term->CurColour &= 0xFFFF8000;
 818                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 819                                         }
 820                                 }
 821                                 break;
 822                         }
 823                 }
 824                 break;
 825
 826         default:
 827                 break;
 828         }
 829
 830         return j + 1;
 831 }
 832
 833 /**
 834  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 835  * \brief Write a single character to a VTerm
 836  */
 837 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 838 {
 839          int    i;
 840         //ENTER("pTerm xCh", Term, Ch);
 841         //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
 842
 843         switch(Ch)
 844         {
 845         case '\0':      return; // Ignore NULL byte
 846         case '\n':
 847                 Term->WritePos += Term->Width;
 848         case '\r':
 849                 Term->WritePos -= Term->WritePos % Term->Width;
 850                 break;
 851
 852         case '\t':
 853                 do {
 854                         Term->Text[ Term->WritePos ].Ch = '\0';
 855                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 856                         Term->WritePos ++;
 857                 } while(Term->WritePos & 7);
 858                 break;
 859
 860         case '\b':
 861                 // Backspace is invalid at Offset 0
 862                 if(Term->WritePos == 0) break;
 863
 864                 Term->WritePos --;
 865                 // Singe Character
 866                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 867                         Term->Text[ Term->WritePos ].Ch = 0;
 868                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 869                         break;
 870                 }
 871                 // Tab
 872                 i = 7;  // Limit it to 8
 873                 do {
 874                         Term->Text[ Term->WritePos ].Ch = 0;
 875                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 876                         Term->WritePos --;
 877                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 878                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 879                         Term->WritePos ++;
 880                 break;
 881
 882         default:
 883                 Term->Text[ Term->WritePos ].Ch = Ch;
 884                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 885                 Term->WritePos ++;
 886                 break;
 887         }
 888
 889
 890         // Move Screen
 891         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 892         {
 893                  int    base, i;
 894                 Term->WritePos -= Term->Width;
 895
 896                 // Update view position
 897                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 898                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 899                 if(Term->ViewPos > base)        Term->ViewPos = base;
 900
 901                 // Scroll terminal cache
 902                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 903
 904                 // Scroll Back
 905                 memcpy(
 906                         Term->Text,
 907                         &Term->Text[Term->Width],
 908                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 909                         );
 910
 911                 // Clear last row
 912                 for( i = 0; i < Term->Width; i ++ )
 913                 {
 914                         Term->Text[ base + i ].Ch = 0;
 915                         Term->Text[ base + i ].Colour = Term->CurColour;
 916                 }
 917
 918                 VT_int_UpdateScreen( Term, 1 );
 919         }
 920         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 921         {
 922                 Term->ViewPos += Term->Width;
 923                 VT_int_UpdateScreen( Term, 1 );
 924         }
 925         else
 926                 VT_int_UpdateScreen( Term, 0 );
 927
 928         //LEAVE('-');
 929 }
 930
 931 /**
 932  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 933  * \brief Updates the video framebuffer
 934  */
 935 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 936 {
 937         // Only update if this is the current terminal
 938         if( Term != &gVT_Terminals[giVT_CurrentTerminal] )      return;
 939
 940         if( Term->Mode == TERM_MODE_TEXT )
 941         {
 942                 if(gbVT_TextMode)
 943                 {
 944                         if(UpdateAll) {
 945                                 VFS_WriteAt(
 946                                         giVT_OutputDevHandle,
 947                                         0,
 948                                         Term->Width*Term->Height*sizeof(tVT_Char),
 949                                         &Term->Text[Term->ViewPos]
 950                                         );
 951                         } else {
 952                                  int    pos = Term->WritePos - Term->WritePos % Term->Width;
 953                                 VFS_WriteAt(
 954                                         giVT_OutputDevHandle,
 955                                         (pos - Term->ViewPos)*sizeof(tVT_Char),
 956                                         Term->Width*sizeof(tVT_Char),
 957                                         &Term->Text[pos]
 958                                         );
 959                         }
 960                 }
 961                 else
 962                 {
 963                         //TODO: Do VT Rendered Text
 964                         #if 0
 965                         if( UpdateAll ) {
 966                                 VT_RenderText(0, Term->Width*Term->Height, &Term->Text[Term->ViewPos]);
 967                         }
 968                         else {
 969                                  int    pos = Term->WritePos - Term->WritePos % Term->Width;
 970                                 VT_RenderText(
 971                                         pos - Term->ViewPos,
 972                                         Term->Width,
 973                                         &Term->Text[pos]
 974                                         );
 975                         }
 976                         #endif
 977                 }
 978         }
 979         else
 980         {
 981                 VFS_WriteAt(
 982                         giVT_OutputDevHandle,
 983                         0,
 984                         Term->Width*Term->Height*sizeof(Uint32),
 985                         &Term->Buffer
 986                         );
 987         }
 988 }
 989
 990 /**
 991  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 992  * \brief Change the mode of a VTerm
 993  */
 994 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 995 {
 996         switch(NewMode)
 997         {
 998         case TERM_MODE_TEXT:
 999                 free(Term->Buffer);
1000                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
1001                 break;
1002         case TERM_MODE_FB:
1003                 free(Term->Text);
1004                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
1005                 break;
1006         //case TERM_MODE_OPENGL:
1007         //      return;
1008         }
1009
1010         Term->Mode = NewMode;
1011 }
1012
1013 // ---
1014 // Font Render
1015 // ---
1016 #define MONOSPACE_FONT  10816
1017
1018 #if MONOSPACE_FONT == 10808     // 8x8
1019 # include "vterm_font_8x8.h"
1020 #elif MONOSPACE_FONT == 10816   // 8x16
1021 # include "vterm_font_8x16.h"
1022 #endif
1023
1024 // === PROTOTYPES ===
1025 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
1026
1027 // === GLOBALS ===
1028 int     giVT_CharWidth = FONT_WIDTH+1;
1029 int     giVT_CharHeight = FONT_HEIGHT;
1030
1031 // === CODE ===
1032 /**
1033  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1034  * \brief Render a font character
1035  */
1036 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1037 {
1038         Uint8   *font;
1039         Uint32  *buf = Buffer;
1040          int    x, y;
1041
1042         font = VT_Font_GetChar(Codepoint);
1043
1044         for(y = 0; y < FONT_HEIGHT; y ++)
1045         {
1046                 for(x = 0; x < FONT_WIDTH; x ++)
1047                 {
1048                         if(*font & (1 << (FONT_WIDTH-x-1)))
1049                                 buf[x] = FGC;
1050                         else
1051                                 buf[x] = BGC;
1052                 }
1053                 buf += Pitch;
1054                 font ++;
1055         }
1056 }
1057
1058 /**
1059  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1060  * \brief Converts a
1061  */
1062 Uint32 VT_Colour12to24(Uint16 Col12)
1063 {
1064         Uint32  ret;
1065          int    tmp;
1066         tmp = Col12 & 0xF;
1067         ret  = (tmp << 0) | (tmp << 4);
1068         tmp = (Col12 & 0xF0) >> 4;
1069         ret |= (tmp << 8) | (tmp << 12);
1070         tmp = (Col12 & 0xF00) >> 8;
1071         ret |= (tmp << 16) | (tmp << 20);
1072         return ret;
1073 }
1074
1075 /**
1076  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1077  * \brief Gets an index into the font array given a Unicode Codepoint
1078  * \note See http://en.wikipedia.org/wiki/CP437
1079  */
1080 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1081 {
1082          int    index = 0;
1083         if(Codepoint < 128)
1084                 return &VTermFont[Codepoint*FONT_HEIGHT];
1085         switch(Codepoint)
1086         {
1087         case 0xC7:      index = 128;    break;  // Ç
1088         case 0xFC:      index = 129;    break;  // ü
1089         case 0xE9:      index = 130;    break;  // é
1090         case 0xE2:      index = 131;    break;  // â
1091         case 0xE4:      index = 132;    break;  // ä
1092         case 0xE0:      index = 133;    break;  // à
1093         case 0xE5:      index = 134;    break;  // å
1094         case 0xE7:      index = 135;    break;  // ç
1095         case 0xEA:      index = 136;    break;  // ê
1096         case 0xEB:      index = 137;    break;  // ë
1097         case 0xE8:      index = 138;    break;  // è
1098         case 0xEF:      index = 139;    break;  // ï
1099         case 0xEE:      index = 140;    break;  // î
1100         case 0xEC:      index = 141;    break;  // ì
1101         case 0xC4:      index = 142;    break;  // Ä
1102         case 0xC5:      index = 143;    break;  // Å
1103         }
1104
1105         return &VTermFont[index*FONT_HEIGHT];
1106 }
1107
1108 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1109 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1110 EXPORT(VT_Font_Render);
1111 EXPORT(VT_Colour12to24);