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   1       // 2 Screens of text
  22 #define DEFAULT_OUTPUT  "VGA"
  23 //#define DEFAULT_OUTPUT        "BochsGA"
  24 #define DEFAULT_INPUT   "PS2Keyboard"
  25 #define DEFAULT_WIDTH   80
  26 #define DEFAULT_HEIGHT  25
  27 #define DEFAULT_COLOUR  (VT_COL_BLACK|(0xAAA<<16))
  28
  29 #define VT_FLAG_HIDECSR 0x01
  30 #define VT_FLAG_HASFB   0x10    //!< Set if the VTerm has requested the Framebuffer
  31
  32 enum eVT_InModes {
  33         VT_INMODE_TEXT8,        // UTF-8 Text Mode (VT100 Emulation)
  34         VT_INMODE_TEXT32,       // UTF-32 Text Mode (Acess Native)
  35         NUM_VT_INMODES
  36 };
  37
  38 // === TYPES ===
  39 typedef struct {
  40          int    Mode;   //!< Current Mode (see ::eTplTerminal_Modes)
  41          int    Flags;  //!< Flags (see VT_FLAG_*)
  42         short   Width;  //!< Virtual Width
  43         short   Height; //!< Virtual Height
  44         short   RealWidth;      //!< Real Width
  45         short   RealHeight;     //!< Real Height
  46
  47          int    ViewPos;        //!< View Buffer Offset (Text Only)
  48          int    WritePos;       //!< Write Buffer Offset (Text Only)
  49         Uint32  CurColour;      //!< Current Text Colour
  50         char    Name[2];        //!< Name of the terminal
  51
  52          int    InputRead;      //!< Input buffer read position
  53          int    InputWrite;     //!< Input buffer write position
  54         char    InputBuffer[MAX_INPUT_CHARS8];
  55         union {
  56                 tVT_Char        *Text;
  57                 Uint32          *Buffer;
  58         };
  59         tVFS_Node       Node;
  60 } tVTerm;
  61
  62 // === IMPORTS ===
  63 extern void     Debug_SetKTerminal(char *File);
  64
  65 // === PROTOTYPES ===
  66  int    VT_Install(char **Arguments);
  67 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  68 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  69  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  70 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  71 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  72  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  73 void    VT_SetTerminal(int ID);
  74 void    VT_KBCallBack(Uint32 Codepoint);
  75 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  76  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  77 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  78 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  79 void    VT_int_ChangeMode(tVTerm *Term, int NewMode);
  80
  81 // === CONSTANTS ===
  82 const Uint16    caVT100Colours[] = {
  83                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  84                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  85         };
  86
  87 // === GLOBALS ===
  88 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
  89 tDevFS_Driver   gVT_DrvInfo = {
  90         NULL, "VTerm",
  91         {
  92         .Flags = VFS_FFLAG_DIRECTORY,
  93         .Size = NUM_VTS,
  94         .Inode = -1,
  95         .NumACLs = 0,
  96         .ReadDir = VT_ReadDir,
  97         .FindDir = VT_FindDir,
  98         .IOCtl = VT_Root_IOCtl
  99         }
 100 };
 101 // --- Terminals ---
 102 tVTerm  gVT_Terminals[NUM_VTS];
 103  int    giVT_CurrentTerminal = 0;
 104 // --- Driver Handles ---
 105 char    *gsVT_OutputDevice = NULL;
 106 char    *gsVT_InputDevice = NULL;
 107  int    giVT_OutputDevHandle = -2;
 108  int    giVT_InputDevHandle = -2;
 109 // --- Key States --- (Used for VT Switching/Magic Combos)
 110  int    gbVT_CtrlDown = 0;
 111  int    gbVT_AltDown = 0;
 112  int    gbVT_SysrqDown = 0;
 113
 114 // === CODE ===
 115 /**
 116  * \fn int VT_Install(char **Arguments)
 117  * \brief Installs the Virtual Terminal Driver
 118  */
 119 int VT_Install(char **Arguments)
 120 {
 121         char    **args = Arguments;
 122         char    *arg;
 123          int    i;
 124
 125         // Scan Arguments
 126         if(Arguments)
 127         {
 128                 for( ; (arg = *args); args++ )
 129                 {
 130                         if(arg[0] != '-')       continue;
 131
 132                         switch(arg[1])
 133                         {
 134                         // Set output device
 135                         case 'o':
 136                                 if(args[1] ==  NULL)    break;
 137                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 138                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 139                                 strcpy(gsVT_OutputDevice, args[1]);
 140                                 args ++;
 141                                 break;
 142
 143                         // Set input device
 144                         case 'i':
 145                                 if(args[1] == NULL)     break;
 146                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 147                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 148                                 strcpy(gsVT_InputDevice, args[1]);
 149                                 args ++;
 150                                 break;
 151
 152                         }
 153                 }
 154         }
 155
 156         // Apply Defaults
 157         if(!gsVT_OutputDevice)  gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
 158         if(!gsVT_InputDevice)   gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
 159
 160         LOG("Using '%s' as output", gsVT_OutputDevice);
 161         LOG("Using '%s' as input", gsVT_InputDevice);
 162
 163         // Create Nodes
 164         for( i = 0; i < NUM_VTS; i++ )
 165         {
 166                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 167                 gVT_Terminals[i].Flags = 0;
 168                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 169                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 170                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 171                 gVT_Terminals[i].WritePos = 0;
 172                 gVT_Terminals[i].ViewPos = 0;
 173
 174                 gVT_Terminals[i].Buffer = calloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK, sizeof(tVT_Char) );
 175
 176                 gVT_Terminals[i].Name[0] = '0'+i;
 177                 gVT_Terminals[i].Name[1] = '\0';
 178                 gVT_Terminals[i].Node.Inode = i;
 179                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 180                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 181
 182                 gVT_Terminals[i].Node.Read = VT_Read;
 183                 gVT_Terminals[i].Node.Write = VT_Write;
 184                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 185         }
 186
 187         // Add to DevFS
 188         DevFS_AddDevice( &gVT_DrvInfo );
 189
 190         // Set kernel output to VT0
 191         Debug_SetKTerminal("/Devices/VTerm/0");
 192
 193         return MODULE_INIT_SUCCESS;
 194 }
 195
 196 /**
 197  * \fn void VT_InitOutput()
 198  * \brief Initialise Video Output
 199  */
 200 void VT_InitOutput()
 201 {
 202         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 203         VT_SetTerminal( 0 );
 204 }
 205
 206 /**
 207  * \fn void VT_InitInput()
 208  * \brief Initialises the input
 209  */
 210 void VT_InitInput()
 211 {
 212         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 213         if(giVT_InputDevHandle == -1)   return ;
 214         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 215 }
 216
 217 /**
 218  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 219  * \brief Read from the VTerm Directory
 220  */
 221 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 222 {
 223         if(Pos < 0)     return NULL;
 224         if(Pos >= NUM_VTS)      return NULL;
 225         return strdup( gVT_Terminals[Pos].Name );
 226 }
 227
 228 /**
 229  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 230  * \brief Find an item in the VTerm directory
 231  */
 232 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 233 {
 234          int    num;
 235
 236         //ENTER("pNode sName", Node, Name);
 237
 238         // Open the input and output files if needed
 239         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 240         if(giVT_InputDevHandle == -2)   VT_InitInput();
 241
 242         // Sanity check name
 243         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 244                 LEAVE('n');
 245                 return NULL;
 246         }
 247         // Get index
 248         num = Name[0] - '0';
 249         if(num >= NUM_VTS) {
 250                 LEAVE('n');
 251                 return NULL;
 252         }
 253         // Return node
 254         //LEAVE('p', &gVT_Terminals[num].Node);
 255         return &gVT_Terminals[num].Node;
 256 }
 257
 258 /**
 259  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 260  * \brief Control the VTerm Driver
 261  */
 262 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 263 {
 264          int    len;
 265         switch(Id)
 266         {
 267         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 268         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 269         case DRV_IOCTL_VERSION: return VERSION;
 270         case DRV_IOCTL_LOOKUP:  return 0;
 271
 272         case 4: // Get Video Driver
 273                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 274                 return strlen(gsVT_OutputDevice);
 275
 276         case 5: // Set Video Driver
 277                 if(!Data)       return -EINVAL;
 278                 if(Threads_GetUID() != 0)       return -EACCES;
 279
 280                 len = strlen(Data);
 281
 282                 free(gsVT_OutputDevice);
 283
 284                 gsVT_OutputDevice = malloc(len+1);
 285                 strcpy(gsVT_OutputDevice, Data);
 286
 287                 VFS_Close(giVT_OutputDevHandle);
 288                 giVT_OutputDevHandle = -1;
 289
 290                 VT_InitOutput();
 291                 return 1;
 292         }
 293         return 0;
 294 }
 295
 296 /**
 297  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 298  * \brief Read from a virtual terminal
 299  */
 300 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 301 {
 302          int    pos = 0;
 303         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 304
 305         // Check current mode
 306         switch(term->Mode)
 307         {
 308         case TERM_MODE_TEXT:
 309                 while(pos < Length)
 310                 {
 311                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 312
 313                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 314                         pos ++;
 315                         term->InputRead ++;
 316                         term->InputRead %= MAX_INPUT_CHARS8;
 317                 }
 318                 break;
 319
 320         case TERM_MODE_FB:
 321         case TERM_MODE_OPENGL:
 322                 while(pos < Length)
 323                 {
 324                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 325                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 326                         pos ++;
 327                         term->InputRead ++;
 328                         term->InputRead %= MAX_INPUT_CHARS32;
 329                 }
 330                 break;
 331         }
 332         return 0;
 333 }
 334
 335 /**
 336  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 337  * \brief Write to a virtual terminal
 338  */
 339 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 340 {
 341         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 342
 343         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 344
 345         // Write
 346         switch( term->Mode )
 347         {
 348         case TERM_MODE_TEXT:
 349                 VT_int_PutString(term, Buffer, Length);
 350                 break;
 351         }
 352
 353         //LEAVE('i', 0);
 354         return 0;
 355 }
 356
 357 /**
 358  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 359  * \brief Call an IO Control on a virtual terminal
 360  */
 361 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 362 {
 363          int    *iData = Data;
 364         tVTerm  *term = Node->ImplPtr;
 365         ENTER("pNode iId pData", Node, Id, Data);
 366
 367         switch(Id)
 368         {
 369         case DRV_IOCTL_TYPE:
 370                 LEAVE('i', DRV_TYPE_TERMINAL);
 371                 return DRV_TYPE_TERMINAL;
 372         case DRV_IOCTL_IDENT:
 373                 memcpy(Data, "VT\0\0", 4);
 374                 LEAVE('i', 0);
 375                 return 0;
 376         case DRV_IOCTL_VERSION:
 377                 LEAVE('x', VERSION);
 378                 return VERSION;
 379         case DRV_IOCTL_LOOKUP:
 380                 LEAVE('i', 0);
 381                 return 0;
 382
 383         // Get/Set the mode (and apply any changes)
 384         case TERM_IOCTL_MODETYPE:
 385                 if(Data != NULL)
 386                 {
 387                         if(term->Mode != *iData)
 388                                 VT_int_ChangeMode(term, *iData);
 389
 390                         // Update the screen dimensions
 391                         if(giVT_CurrentTerminal == Node->Inode)
 392                                 VT_SetTerminal( giVT_CurrentTerminal );
 393                 }
 394                 LEAVE('i', term->Mode);
 395                 return term->Mode;
 396
 397         // Get/set the terminal width
 398         case TERM_IOCTL_WIDTH:
 399                 if(Data != NULL)        term->Width = *iData;
 400                 Log("VT_Terminal_IOCtl - RETURN term->Width = %i", term->Width);
 401                 LEAVE('i', term->Width);
 402                 return term->Width;
 403
 404         // Get/set the terminal height
 405         case TERM_IOCTL_HEIGHT:
 406                 if(Data != NULL)        term->Height = *iData;
 407                 Log("VT_Terminal_IOCtl - RETURN term->Height = %i", term->Height);
 408                 LEAVE('i', term->Height);
 409                 return term->Height;
 410         }
 411         LEAVE('i', -1);
 412         return -1;
 413 }
 414
 415 /**
 416  * \fn void VT_SetTerminal(int ID)
 417  * \brief Set the current terminal
 418  */
 419 void VT_SetTerminal(int ID)
 420 {
 421         tVideo_IOCtl_Mode       mode = {0};
 422          int    modeNum;
 423
 424         // Create the video mode
 425         mode.width = gVT_Terminals[ ID ].Width;
 426         mode.height = gVT_Terminals[ ID ].Height;
 427         // - Text Mode
 428         if(gVT_Terminals[ ID ].Mode == TERM_MODE_TEXT) {
 429                 mode.bpp = 12;
 430                 mode.flags = VIDEO_FLAG_TEXT;
 431         }
 432         // - Framebuffer or 3D
 433         else {
 434                 mode.bpp = 32;
 435                 mode.flags = 0;
 436         }
 437
 438         // Set video mode
 439         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 440         modeNum = mode.id;
 441         gVT_Terminals[ ID ].RealWidth = mode.width;
 442         gVT_Terminals[ ID ].RealHeight = mode.height;
 443         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &modeNum );
 444
 445         // Update current terminal ID
 446         Log("Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 447         giVT_CurrentTerminal = ID;
 448
 449         // Update the screen
 450         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 451 }
 452
 453 /**
 454  * \fn void VT_KBCallBack(Uint32 Codepoint)
 455  * \brief Called on keyboard interrupt
 456  */
 457 void VT_KBCallBack(Uint32 Codepoint)
 458 {
 459         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 460
 461         // How the hell did we get a Codepoint of zero?
 462         if(Codepoint == 0)      return;
 463
 464         // Key Up
 465         if( Codepoint & 0x80000000 )
 466         {
 467                 Codepoint &= 0x7FFFFFFF;
 468                 switch(Codepoint)
 469                 {
 470                 #if !USE_CTRL_ALT
 471                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 472                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 473                 #else
 474                 case KEY_LALT:
 475                 case KEY_RALT:
 476                         gbVT_AltDown = 0;
 477                         break;
 478                 case KEY_LCTRL:
 479                 case KEY_RCTRL:
 480                         gbVT_CtrlDown = 0;
 481                         break;
 482                 #endif
 483                 }
 484                 return;
 485         }
 486
 487         switch(Codepoint)
 488         {
 489         #if !USE_CTRL_ALT
 490         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 491         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 492         #else
 493         case KEY_LALT:
 494         case KEY_RALT:
 495                 gbVT_AltDown = 1;
 496                 break;
 497         case KEY_LCTRL:
 498         case KEY_RCTRL:
 499                 gbVT_CtrlDown = 1;
 500                 break;
 501         #endif
 502
 503         default:
 504                 #if USE_CTRL_ALT
 505                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 506                         break;
 507                 #endif
 508                 switch(Codepoint)
 509                 {
 510                 case KEY_F1:    VT_SetTerminal(0);      return;
 511                 case KEY_F2:    VT_SetTerminal(1);      return;
 512                 case KEY_F3:    VT_SetTerminal(2);      return;
 513                 case KEY_F4:    VT_SetTerminal(3);      return;
 514                 case KEY_F5:    VT_SetTerminal(4);      return;
 515                 case KEY_F6:    VT_SetTerminal(5);      return;
 516                 case KEY_F7:    VT_SetTerminal(6);      return;
 517                 case KEY_F8:    VT_SetTerminal(7);      return;
 518                 case KEY_F9:    VT_SetTerminal(8);      return;
 519                 case KEY_F10:   VT_SetTerminal(9);      return;
 520                 case KEY_F11:   VT_SetTerminal(10);     return;
 521                 case KEY_F12:   VT_SetTerminal(11);     return;
 522                 case KEY_PGUP:
 523                         return;
 524                 case KEY_PGDOWN:
 525                         return;
 526                 }
 527         }
 528
 529         // Encode key
 530         if(term->Mode == TERM_MODE_TEXT)
 531         {
 532                 Uint8   buf[6] = {0};
 533                  int    len = 0;
 534
 535                 // Ignore Modifer Keys
 536                 if(Codepoint > KEY_MODIFIERS)   return;
 537
 538                 // Get UTF-8/ANSI Encoding
 539                 switch(Codepoint)
 540                 {
 541                 case KEY_LEFT:
 542                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 543                         len = 3;
 544                         break;
 545                 case KEY_RIGHT:
 546                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 547                         len = 3;
 548                         break;
 549                 case KEY_UP:
 550                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 551                         len = 3;
 552                         break;
 553                 case KEY_DOWN:
 554                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 555                         len = 3;
 556                         break;
 557
 558                 case KEY_PGUP:
 559                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 560                         //len = 4;      // Commented out until I'm sure
 561                         break;
 562                 case KEY_PGDOWN:
 563                         len = 0;
 564                         break;
 565
 566                 // Attempt to encode in UTF-8
 567                 default:
 568                         len = WriteUTF8( buf, Codepoint );
 569                         if(len == 0) {
 570                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 571                         }
 572                         break;
 573                 }
 574
 575                 if(len == 0) {
 576                         // Unprintable / Don't Pass
 577                         return;
 578                 }
 579
 580                 // Write
 581                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 582                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 583                 else {
 584                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 585                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 586                 }
 587                 // Roll the buffer over
 588                 term->InputWrite += len;
 589                 term->InputWrite %= MAX_INPUT_CHARS8;
 590                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 591                         term->InputRead = term->InputWrite + 1;
 592                         term->InputRead %= MAX_INPUT_CHARS8;
 593                 }
 594
 595         }
 596         else
 597         {
 598                 // Encode the raw UTF-32 Key
 599                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 600                 term->InputWrite ++;
 601                 term->InputWrite %= MAX_INPUT_CHARS32;
 602                 if(term->InputRead == term->InputWrite) {
 603                         term->InputRead ++;
 604                         term->InputRead %= MAX_INPUT_CHARS32;
 605                 }
 606         }
 607 }
 608
 609 /**
 610  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 611  * \brief Print a string to the Virtual Terminal
 612  */
 613 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 614 {
 615         Uint32  val;
 616          int    i;
 617         for( i = 0; i < Count; i++ )
 618         {
 619                 if( Buffer[i] == 0x1B ) // Escape Sequence
 620                 {
 621                         i ++;
 622                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 623                         continue;
 624                 }
 625
 626                 if( Buffer[i] < 128 )   // Plain ASCII
 627                         VT_int_PutChar(Term, Buffer[i]);
 628                 else {  // UTF-8
 629                         i += ReadUTF8(&Buffer[i], &val);
 630                         VT_int_PutChar(Term, val);
 631                 }
 632         }
 633
 634         // Update cursor
 635         if( !(Term->Flags & VT_FLAG_HIDECSR) )
 636         {
 637                 tVideo_IOCtl_Pos        pos;
 638                 pos.x = Term->WritePos % Term->Width;
 639                 pos.y = Term->WritePos / Term->Width;
 640                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 641         }
 642 }
 643
 644 /**
 645  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 646  * \brief Clears a line in a virtual terminal
 647  */
 648 void VT_int_ClearLine(tVTerm *Term, int Num)
 649 {
 650          int    i;
 651         //ENTER("pTerm iNum", Term, Num);
 652         for( i = Term->Width; i--; )
 653         {
 654                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 655                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 656         }
 657         //LEAVE('-');
 658 }
 659
 660 /**
 661  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 662  * \brief Parses a VT100 Escape code
 663  */
 664 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 665 {
 666         char    c;
 667          int    argc = 0, j = 1;
 668          int    tmp;
 669          int    args[4] = {0,0,0,0};
 670
 671         switch(Buffer[0]) {
 672         //Large Code
 673         case '[':
 674                 // Get Arguments
 675                 c = Buffer[1];
 676                 do {
 677                         while('0' <= c && c <= '9') {
 678                                 args[argc] *= 10;
 679                                 args[argc] += c-'0';
 680                                 c = Buffer[++j];
 681                         }
 682                         if( j != 1 )    argc ++;
 683                 } while(c == ';');
 684
 685                 // Get string (what does this do?)
 686                 if(c == '"') {
 687                         c = Buffer[++j];
 688                         while(c != '"')
 689                                 c = Buffer[++j];
 690                 }
 691
 692                 // Get Command
 693                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 694                 {
 695                         switch(c)
 696                         {
 697                         // Left
 698                         case 'D':
 699                                 if(argc == 1)   tmp = args[0];
 700                                 else    tmp = 1;
 701
 702                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 703                                         Term->WritePos -= Term->WritePos % Term->Width;
 704                                 else
 705                                         Term->WritePos -= tmp;
 706                                 break;
 707
 708                         // Right
 709                         case 'C':
 710                                 if(argc == 1)   tmp = args[0];
 711                                 else    tmp = 1;
 712                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 713                                         Term->WritePos -= Term->WritePos % Term->Width;
 714                                         Term->WritePos += Term->Width - 1;
 715                                 } else
 716                                         Term->WritePos += tmp;
 717                                 break;
 718
 719                         // Clear By Line
 720                         case 'J':
 721                                 // Clear Screen
 722                                 switch(args[0])
 723                                 {
 724                                 case 2:
 725                                         {
 726                                          int    i = Term->Height * VT_SCROLLBACK;
 727                                         while( i-- )    VT_int_ClearLine(Term, i);
 728                                         Term->WritePos = 0;
 729                                         Term->ViewPos = 0;
 730                                         VT_int_UpdateScreen(Term, 1);
 731                                         }
 732                                         break;
 733                                 }
 734                                 break;
 735                         // Set Font flags
 736                         case 'm':
 737                                 for( ; argc--; )
 738                                 {
 739                                         // Flags
 740                                         if( 0 <= args[argc] && args[argc] <= 8)
 741                                         {
 742                                                 switch(args[argc])
 743                                                 {
 744                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 745                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 746                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 747                                                 }
 748                                         }
 749                                         // Foreground Colour
 750                                         else if(30 <= args[argc] && args[argc] <= 37) {
 751                                                 Term->CurColour &= 0xF000FFFF;
 752                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 753                                         }
 754                                         // Background Colour
 755                                         else if(40 <= args[argc] && args[argc] <= 47) {
 756                                                 Term->CurColour &= 0xFFFF8000;
 757                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 758                                         }
 759                                 }
 760                                 break;
 761                         }
 762                 }
 763                 break;
 764
 765         default:
 766                 break;
 767         }
 768
 769         return j + 1;
 770 }
 771
 772 /**
 773  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 774  * \brief Write a single character to a VTerm
 775  */
 776 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 777 {
 778          int    i;
 779         //ENTER("pTerm xCh", Term, Ch);
 780         //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
 781
 782         switch(Ch)
 783         {
 784         case '\0':      return; // Ignore NULL byte
 785         case '\n':
 786                 Term->WritePos += Term->Width;
 787         case '\r':
 788                 Term->WritePos -= Term->WritePos % Term->Width;
 789                 break;
 790
 791         case '\t':
 792                 do {
 793                         Term->Text[ Term->WritePos ].Ch = '\0';
 794                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 795                         Term->WritePos ++;
 796                 } while(Term->WritePos & 7);
 797                 break;
 798
 799         case '\b':
 800                 // Backspace is invalid at Offset 0
 801                 if(Term->WritePos == 0) break;
 802
 803                 Term->WritePos --;
 804                 // Singe Character
 805                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 806                         Term->Text[ Term->WritePos ].Ch = 0;
 807                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 808                         break;
 809                 }
 810                 // Tab
 811                 i = 7;  // Limit it to 8
 812                 do {
 813                         Term->Text[ Term->WritePos ].Ch = 0;
 814                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 815                         Term->WritePos --;
 816                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 817                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 818                         Term->WritePos ++;
 819                 break;
 820
 821         default:
 822                 Term->Text[ Term->WritePos ].Ch = Ch;
 823                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 824                 Term->WritePos ++;
 825                 break;
 826         }
 827
 828
 829         // Move Screen
 830         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 831         {
 832                  int    base, i;
 833                 Term->WritePos -= Term->Width;
 834
 835                 // Update view position
 836                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 837                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 838                 if(Term->ViewPos > base)        Term->ViewPos = base;
 839
 840                 // Scroll terminal cache
 841                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 842
 843                 // Scroll Back
 844                 memcpy(
 845                         Term->Text,
 846                         &Term->Text[Term->Width],
 847                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 848                         );
 849
 850                 // Clear last row
 851                 for( i = 0; i < Term->Width; i ++ )
 852                 {
 853                         Term->Text[ base + i ].Ch = 0;
 854                         Term->Text[ base + i ].Colour = Term->CurColour;
 855                 }
 856
 857                 VT_int_UpdateScreen( Term, 1 );
 858         }
 859         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 860         {
 861                 Term->ViewPos += Term->Width;
 862                 VT_int_UpdateScreen( Term, 1 );
 863         }
 864         else
 865                 VT_int_UpdateScreen( Term, 0 );
 866
 867         //LEAVE('-');
 868 }
 869
 870 /**
 871  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 872  * \brief Updates the video framebuffer
 873  */
 874 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 875 {
 876         // Only update if this is the current terminal
 877         if( Term != &gVT_Terminals[giVT_CurrentTerminal] )      return;
 878
 879         if( Term->Mode == TERM_MODE_TEXT )
 880         {
 881                 if(UpdateAll) {
 882                         VFS_WriteAt(
 883                                 giVT_OutputDevHandle,
 884                                 0,
 885                                 Term->Width*Term->Height*sizeof(tVT_Char),
 886                                 &Term->Text[Term->ViewPos]
 887                                 );
 888                 } else {
 889                          int    pos = Term->WritePos - Term->WritePos % Term->Width;
 890                         VFS_WriteAt(
 891                                 giVT_OutputDevHandle,
 892                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
 893                                 Term->Width*sizeof(tVT_Char),
 894                                 &Term->Text[pos]
 895                                 );
 896                 }
 897         }
 898         else
 899         {
 900                 VFS_WriteAt(
 901                         giVT_OutputDevHandle,
 902                         0,
 903                         Term->Width*Term->Height*sizeof(Uint32),
 904                         &Term->Buffer
 905                         );
 906         }
 907 }
 908
 909 /**
 910  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 911  * \brief Change the mode of a VTerm
 912  */
 913 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 914 {
 915         switch(NewMode)
 916         {
 917         case TERM_MODE_TEXT:
 918                 free(Term->Buffer);
 919                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
 920                 break;
 921         case TERM_MODE_FB:
 922                 free(Term->Text);
 923                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
 924                 break;
 925         case TERM_MODE_OPENGL:
 926                 return;
 927         }
 928
 929         Term->Mode = NewMode;
 930 }
 931
 932 // ---
 933 // Font Render
 934 // ---
 935 #define MONOSPACE_FONT  10816
 936
 937 #if MONOSPACE_FONT == 10808     // 8x8
 938 # include "vterm_font_8x8.h"
 939 #elif MONOSPACE_FONT == 10816   // 8x16
 940 # include "vterm_font_8x16.h"
 941 #endif
 942
 943 // === PROTOTYPES ===
 944 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
 945
 946 // === GLOBALS ===
 947 int     giVT_CharWidth = FONT_WIDTH+1;
 948 int     giVT_CharHeight = FONT_HEIGHT;
 949
 950 // === CODE ===
 951 /**
 952  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 953  * \brief Render a font character
 954  */
 955 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 956 {
 957         Uint8   *font;
 958         Uint32  *buf = Buffer;
 959          int    x, y;
 960
 961         font = VT_Font_GetChar(Codepoint);
 962
 963         for(y = 0; y < FONT_HEIGHT; y ++)
 964         {
 965                 for(x = 0; x < FONT_WIDTH; x ++)
 966                 {
 967                         if(*font & (1 << (FONT_WIDTH-x-1)))
 968                                 buf[x] = FGC;
 969                         else
 970                                 buf[x] = BGC;
 971                 }
 972                 buf += Pitch;
 973                 font ++;
 974         }
 975 }
 976
 977 /**
 978  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
 979  * \brief Converts a
 980  */
 981 Uint32 VT_Colour12to24(Uint16 Col12)
 982 {
 983         Uint32  ret;
 984          int    tmp;
 985         tmp = Col12 & 0xF;
 986         ret  = (tmp << 0) | (tmp << 4);
 987         tmp = (Col12 & 0xF0) >> 4;
 988         ret |= (tmp << 8) | (tmp << 12);
 989         tmp = (Col12 & 0xF00) >> 8;
 990         ret |= (tmp << 16) | (tmp << 20);
 991         return ret;
 992 }
 993
 994 /**
 995  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 996  * \brief Gets an index into the font array given a Unicode Codepoint
 997  * \note See http://en.wikipedia.org/wiki/CP437
 998  */
 999 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1000 {
1001          int    index = 0;
1002         if(Codepoint < 128)
1003                 return &VTermFont[Codepoint*FONT_HEIGHT];
1004         switch(Codepoint)
1005         {
1006         case 0xC7:      index = 128;    break;  // Ç
1007         case 0xFC:      index = 129;    break;  // ü
1008         case 0xE9:      index = 130;    break;  // é
1009         case 0xE2:      index = 131;    break;  // â
1010         case 0xE4:      index = 132;    break;  // ä
1011         case 0xE0:      index = 133;    break;  // à
1012         case 0xE5:      index = 134;    break;  // å
1013         case 0xE7:      index = 135;    break;  // ç
1014         case 0xEA:      index = 136;    break;  // ê
1015         case 0xEB:      index = 137;    break;  // ë
1016         case 0xE8:      index = 138;    break;  // è
1017         case 0xEF:      index = 139;    break;  // ï
1018         case 0xEE:      index = 140;    break;  // î
1019         case 0xEC:      index = 141;    break;  // ì
1020         case 0xC4:      index = 142;    break;  // Ä
1021         case 0xC5:      index = 143;    break;  // Å
1022         }
1023
1024         return &VTermFont[index*FONT_HEIGHT];
1025 }
1026
1027 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1028 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1029 EXPORT(VT_Font_Render);
1030 EXPORT(VT_Colour12to24);