Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #define DEBUG   0
   5 #include <acess.h>
   6 #include <fs_devfs.h>
   7 #include <modules.h>
   8 #include <tpl_drv_video.h>
   9 #include <tpl_drv_keyboard.h>
  10 #include <tpl_drv_terminal.h>
  11 #include <errno.h>
  12
  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                 return ;
 215         }
 216         VT_SetTerminal( 0 );
 217         VT_SetResolution(1, 640, 400);
 218 }
 219
 220 /**
 221  * \fn void VT_InitInput()
 222  * \brief Initialises the input
 223  */
 224 void VT_InitInput()
 225 {
 226         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 227         if(giVT_InputDevHandle == -1)   return ;
 228         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 229 }
 230
 231 /**
 232  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 233  * \brief Read from the VTerm Directory
 234  */
 235 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 236 {
 237         if(Pos < 0)     return NULL;
 238         if(Pos >= NUM_VTS)      return NULL;
 239         return strdup( gVT_Terminals[Pos].Name );
 240 }
 241
 242 /**
 243  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 244  * \brief Find an item in the VTerm directory
 245  */
 246 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 247 {
 248          int    num;
 249
 250         ENTER("pNode sName", Node, Name);
 251
 252         // Open the input and output files if needed
 253         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 254         if(giVT_InputDevHandle == -2)   VT_InitInput();
 255
 256         // Sanity check name
 257         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 258                 LEAVE('n');
 259                 return NULL;
 260         }
 261         // Get index
 262         num = Name[0] - '0';
 263         if(num >= NUM_VTS) {
 264                 LEAVE('n');
 265                 return NULL;
 266         }
 267         // Return node
 268         LEAVE('p', &gVT_Terminals[num].Node);
 269         return &gVT_Terminals[num].Node;
 270 }
 271
 272 /**
 273  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 274  * \brief Control the VTerm Driver
 275  */
 276 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 277 {
 278          int    len;
 279         switch(Id)
 280         {
 281         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 282         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 283         case DRV_IOCTL_VERSION: return VERSION;
 284         case DRV_IOCTL_LOOKUP:  return 0;
 285
 286         case 4: // Get Video Driver
 287                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 288                 return strlen(gsVT_OutputDevice);
 289
 290         case 5: // Set Video Driver
 291                 if(!Data)       return -EINVAL;
 292                 if(Threads_GetUID() != 0)       return -EACCES;
 293
 294                 len = strlen(Data);
 295
 296                 free(gsVT_OutputDevice);
 297
 298                 gsVT_OutputDevice = malloc(len+1);
 299                 strcpy(gsVT_OutputDevice, Data);
 300
 301                 VFS_Close(giVT_OutputDevHandle);
 302                 giVT_OutputDevHandle = -1;
 303
 304                 VT_InitOutput();
 305                 return 1;
 306         }
 307         return 0;
 308 }
 309
 310 /**
 311  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 312  * \brief Read from a virtual terminal
 313  */
 314 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 315 {
 316          int    pos = 0;
 317         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 318
 319         // Check current mode
 320         switch(term->Mode)
 321         {
 322         case TERM_MODE_TEXT:
 323                 while(pos < Length)
 324                 {
 325                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 326
 327                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 328                         pos ++;
 329                         term->InputRead ++;
 330                         term->InputRead %= MAX_INPUT_CHARS8;
 331                 }
 332                 break;
 333
 334         //case TERM_MODE_FB:
 335         default:
 336                 while(pos < Length)
 337                 {
 338                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 339                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 340                         pos ++;
 341                         term->InputRead ++;
 342                         term->InputRead %= MAX_INPUT_CHARS32;
 343                 }
 344                 break;
 345         }
 346         return 0;
 347 }
 348
 349 /**
 350  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 351  * \brief Write to a virtual terminal
 352  */
 353 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 354 {
 355         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 356
 357         // Write
 358         switch( term->Mode )
 359         {
 360         case TERM_MODE_TEXT:
 361                 VT_int_PutString(term, Buffer, Length);
 362                 break;
 363         case TERM_MODE_FB:
 364                 if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
 365                 {
 366                         #if 0
 367                          int    x, y, h;
 368                         x = Offset/4;   y = x / term->Width;    x %= term->Width;
 369                         w = Length/4+x; h = w / term->Width;    w %= term->Width;
 370                         while(h--)
 371                         {
 372                                 VFS_WriteAt( giVT_OutputDevHandle,
 373                                         (x+y*term->RealWidth)*4,
 374                                         term->Width * 4,
 375                                         Buffer
 376                                         );
 377                                 Buffer = (void*)( (Uint)Buffer + term->Width*term->Height*4 );
 378                         }
 379                         #endif
 380                         return 0;
 381                 }
 382                 else {
 383                         return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 384                 }
 385         }
 386
 387         return 0;
 388 }
 389
 390 /**
 391  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 392  * \brief Call an IO Control on a virtual terminal
 393  */
 394 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 395 {
 396          int    *iData = Data;
 397         tVTerm  *term = Node->ImplPtr;
 398         ENTER("pNode iId pData", Node, Id, Data);
 399
 400         if(Id >= DRV_IOCTL_LOOKUP) {
 401                 if( Threads_GetUID() != 0 )     return -1;
 402         }
 403
 404         switch(Id)
 405         {
 406         case DRV_IOCTL_TYPE:
 407                 LEAVE('i', DRV_TYPE_TERMINAL);
 408                 return DRV_TYPE_TERMINAL;
 409         case DRV_IOCTL_IDENT:
 410                 memcpy(Data, "VT\0\0", 4);
 411                 LEAVE('i', 0);
 412                 return 0;
 413         case DRV_IOCTL_VERSION:
 414                 LEAVE('x', VERSION);
 415                 return VERSION;
 416         case DRV_IOCTL_LOOKUP:
 417                 LEAVE('i', 0);
 418                 return 0;
 419
 420         // Get/Set the mode (and apply any changes)
 421         case TERM_IOCTL_MODETYPE:
 422                 if(Data != NULL)
 423                 {
 424                         if(term->Mode != *iData)
 425                                 VT_int_ChangeMode(term, *iData);
 426
 427                         // Update the screen dimensions
 428                         if(giVT_CurrentTerminal == Node->Inode)
 429                                 VT_SetTerminal( giVT_CurrentTerminal );
 430                 }
 431                 LEAVE('i', term->Mode);
 432                 return term->Mode;
 433
 434         // Get/set the terminal width
 435         case TERM_IOCTL_WIDTH:
 436                 if(Data != NULL)        term->Width = *iData;
 437                 Log("VT_Terminal_IOCtl - RETURN term->Width = %i", term->Width);
 438                 LEAVE('i', term->Width);
 439                 return term->Width;
 440
 441         // Get/set the terminal height
 442         case TERM_IOCTL_HEIGHT:
 443                 if(Data != NULL)        term->Height = *iData;
 444                 Log("VT_Terminal_IOCtl - RETURN term->Height = %i", term->Height);
 445                 LEAVE('i', term->Height);
 446                 return term->Height;
 447
 448         case TERM_IOCTL_FORCESHOW:
 449                 VT_SetTerminal( Node->Inode );
 450                 LEAVE('i', 1);
 451                 return 1;
 452         }
 453         LEAVE('i', -1);
 454         return -1;
 455 }
 456
 457 void VT_SetResolution(int IsTextMode, int Width, int Height)
 458 {
 459         tVideo_IOCtl_Mode       mode = {0};
 460          int    tmp;
 461
 462         // Create the video mode
 463         mode.width = Width;
 464         mode.height = Height;
 465         mode.bpp = 32;
 466         mode.flags = 0;
 467
 468         // Set video mode
 469         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 470         tmp = mode.id;
 471         giVT_RealWidth = mode.width;
 472         giVT_RealHeight = mode.height;
 473         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 474
 475         tmp = IsTextMode ? VIDEO_BUFFMT_TEXT : VIDEO_BUFFMT_FRAMEBUFFER;
 476         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp );
 477 }
 478
 479 /**
 480  * \fn void VT_SetTerminal(int ID)
 481  * \brief Set the current terminal
 482  */
 483 void VT_SetTerminal(int ID)
 484 {
 485         // Update current terminal ID
 486         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 487         giVT_CurrentTerminal = ID;
 488         gpVT_CurTerm = &gVT_Terminals[ID];
 489
 490         // Update cursor
 491         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT && !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
 492         {
 493                 tVideo_IOCtl_Pos        pos;
 494                 pos.x = gpVT_CurTerm->WritePos % gpVT_CurTerm->Width;
 495                 pos.y = gpVT_CurTerm->WritePos / gpVT_CurTerm->Width;
 496                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 497         }
 498
 499         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 500                 VT_SetResolution( 1, gpVT_CurTerm->Width*giVT_CharWidth, gpVT_CurTerm->Height*giVT_CharHeight );
 501         else
 502                 VT_SetResolution( 0, gpVT_CurTerm->Width, gpVT_CurTerm->Height );
 503
 504         // Update the screen
 505         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 506 }
 507
 508 /**
 509  * \fn void VT_KBCallBack(Uint32 Codepoint)
 510  * \brief Called on keyboard interrupt
 511  * \param Codepoint     Pseudo-UTF32 character
 512  *
 513  * Handles a key press and sends the key code to the user's buffer.
 514  * If the code creates a kernel-magic sequence, it is not passed to the
 515  * user and is handled in-kernel.
 516  */
 517 void VT_KBCallBack(Uint32 Codepoint)
 518 {
 519         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 520
 521         // How the hell did we get a Codepoint of zero?
 522         if(Codepoint == 0)      return;
 523
 524         // Key Up
 525         if( Codepoint & 0x80000000 )
 526         {
 527                 Codepoint &= 0x7FFFFFFF;
 528                 switch(Codepoint)
 529                 {
 530                 #if !USE_CTRL_ALT
 531                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 532                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 533                 #else
 534                 case KEY_LALT:
 535                 case KEY_RALT:
 536                         gbVT_AltDown = 0;
 537                         break;
 538                 case KEY_LCTRL:
 539                 case KEY_RCTRL:
 540                         gbVT_CtrlDown = 0;
 541                         break;
 542                 #endif
 543                 }
 544                 return;
 545         }
 546
 547         switch(Codepoint)
 548         {
 549         #if !USE_CTRL_ALT
 550         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 551         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 552         #else
 553         case KEY_LALT:
 554         case KEY_RALT:
 555                 gbVT_AltDown = 1;
 556                 break;
 557         case KEY_LCTRL:
 558         case KEY_RCTRL:
 559                 gbVT_CtrlDown = 1;
 560                 break;
 561         #endif
 562
 563         default:
 564                 #if USE_CTRL_ALT
 565                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 566                         break;
 567                 #endif
 568                 switch(Codepoint)
 569                 {
 570                 case KEY_F1:    VT_SetTerminal(0);      return;
 571                 case KEY_F2:    VT_SetTerminal(1);      return;
 572                 case KEY_F3:    VT_SetTerminal(2);      return;
 573                 case KEY_F4:    VT_SetTerminal(3);      return;
 574                 case KEY_F5:    VT_SetTerminal(4);      return;
 575                 case KEY_F6:    VT_SetTerminal(5);      return;
 576                 case KEY_F7:    VT_SetTerminal(6);      return;
 577                 case KEY_F8:    VT_SetTerminal(7);      return;
 578                 case KEY_F9:    VT_SetTerminal(8);      return;
 579                 case KEY_F10:   VT_SetTerminal(9);      return;
 580                 case KEY_F11:   VT_SetTerminal(10);     return;
 581                 case KEY_F12:   VT_SetTerminal(11);     return;
 582                 case KEY_PGUP:
 583                         if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
 584                                 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
 585                         else
 586                                 gpVT_CurTerm->ViewPos = 0;
 587                         return;
 588                 case KEY_PGDOWN:
 589                         if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1)) )
 590                                 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
 591                         else
 592                                 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1));
 593                         return;
 594                 }
 595         }
 596
 597         // Encode key
 598         if(term->Mode == TERM_MODE_TEXT)
 599         {
 600                 Uint8   buf[6] = {0};
 601                  int    len = 0;
 602
 603                 // Ignore Modifer Keys
 604                 if(Codepoint > KEY_MODIFIERS)   return;
 605
 606                 // Get UTF-8/ANSI Encoding
 607                 switch(Codepoint)
 608                 {
 609                 case KEY_LEFT:
 610                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 611                         len = 3;
 612                         break;
 613                 case KEY_RIGHT:
 614                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 615                         len = 3;
 616                         break;
 617                 case KEY_UP:
 618                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 619                         len = 3;
 620                         break;
 621                 case KEY_DOWN:
 622                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 623                         len = 3;
 624                         break;
 625
 626                 case KEY_PGUP:
 627                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 628                         //len = 4;      // Commented out until I'm sure
 629                         break;
 630                 case KEY_PGDOWN:
 631                         len = 0;
 632                         break;
 633
 634                 // Attempt to encode in UTF-8
 635                 default:
 636                         len = WriteUTF8( buf, Codepoint );
 637                         if(len == 0) {
 638                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 639                         }
 640                         break;
 641                 }
 642
 643                 if(len == 0) {
 644                         // Unprintable / Don't Pass
 645                         return;
 646                 }
 647
 648                 // Write
 649                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 650                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 651                 else {
 652                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 653                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 654                 }
 655                 // Roll the buffer over
 656                 term->InputWrite += len;
 657                 term->InputWrite %= MAX_INPUT_CHARS8;
 658                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 659                         term->InputRead = term->InputWrite + 1;
 660                         term->InputRead %= MAX_INPUT_CHARS8;
 661                 }
 662
 663         }
 664         else
 665         {
 666                 // Encode the raw UTF-32 Key
 667                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 668                 term->InputWrite ++;
 669                 term->InputWrite %= MAX_INPUT_CHARS32;
 670                 if(term->InputRead == term->InputWrite) {
 671                         term->InputRead ++;
 672                         term->InputRead %= MAX_INPUT_CHARS32;
 673                 }
 674         }
 675 }
 676
 677 /**
 678  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 679  * \brief Clears a line in a virtual terminal
 680  */
 681 void VT_int_ClearLine(tVTerm *Term, int Num)
 682 {
 683          int    i;
 684         //ENTER("pTerm iNum", Term, Num);
 685         for( i = Term->Width; i--; )
 686         {
 687                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 688                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 689         }
 690         //LEAVE('-');
 691 }
 692
 693 /**
 694  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 695  * \brief Parses a VT100 Escape code
 696  */
 697 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 698 {
 699         char    c;
 700          int    argc = 0, j = 1;
 701          int    tmp;
 702          int    args[4] = {0,0,0,0};
 703
 704         switch(Buffer[0]) {
 705         //Large Code
 706         case '[':
 707                 // Get Arguments
 708                 c = Buffer[1];
 709                 do {
 710                         while('0' <= c && c <= '9') {
 711                                 args[argc] *= 10;
 712                                 args[argc] += c-'0';
 713                                 c = Buffer[++j];
 714                         }
 715                         if( j != 1 )    argc ++;
 716                 } while(c == ';');
 717
 718                 // Get string (what does this do?)
 719                 if(c == '"') {
 720                         c = Buffer[++j];
 721                         while(c != '"')
 722                                 c = Buffer[++j];
 723                 }
 724
 725                 // Get Command
 726                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 727                 {
 728                         switch(c)
 729                         {
 730                         // Left
 731                         case 'D':
 732                                 if(argc == 1)   tmp = args[0];
 733                                 else    tmp = 1;
 734
 735                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 736                                         Term->WritePos -= Term->WritePos % Term->Width;
 737                                 else
 738                                         Term->WritePos -= tmp;
 739                                 break;
 740
 741                         // Right
 742                         case 'C':
 743                                 if(argc == 1)   tmp = args[0];
 744                                 else    tmp = 1;
 745                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 746                                         Term->WritePos -= Term->WritePos % Term->Width;
 747                                         Term->WritePos += Term->Width - 1;
 748                                 } else
 749                                         Term->WritePos += tmp;
 750                                 break;
 751
 752                         // Clear By Line
 753                         case 'J':
 754                                 // Clear Screen
 755                                 switch(args[0])
 756                                 {
 757                                 case 2:
 758                                         {
 759                                          int    i = Term->Height * VT_SCROLLBACK;
 760                                         while( i-- )    VT_int_ClearLine(Term, i);
 761                                         Term->WritePos = 0;
 762                                         Term->ViewPos = 0;
 763                                         VT_int_UpdateScreen(Term, 1);
 764                                         }
 765                                         break;
 766                                 }
 767                                 break;
 768                         // Set Font flags
 769                         case 'm':
 770                                 for( ; argc--; )
 771                                 {
 772                                         // Flags
 773                                         if( 0 <= args[argc] && args[argc] <= 8)
 774                                         {
 775                                                 switch(args[argc])
 776                                                 {
 777                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 778                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 779                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 780                                                 }
 781                                         }
 782                                         // Foreground Colour
 783                                         else if(30 <= args[argc] && args[argc] <= 37) {
 784                                                 Term->CurColour &= 0xF000FFFF;
 785                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 786                                         }
 787                                         // Background Colour
 788                                         else if(40 <= args[argc] && args[argc] <= 47) {
 789                                                 Term->CurColour &= 0xFFFF8000;
 790                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 791                                         }
 792                                 }
 793                                 break;
 794                         }
 795                 }
 796                 break;
 797
 798         default:
 799                 break;
 800         }
 801
 802         return j + 1;
 803 }
 804
 805 /**
 806  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 807  * \brief Print a string to the Virtual Terminal
 808  */
 809 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 810 {
 811         Uint32  val;
 812          int    i;
 813         for( i = 0; i < Count; i++ )
 814         {
 815                 if( Buffer[i] == 0x1B ) // Escape Sequence
 816                 {
 817                         i ++;
 818                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 819                         continue;
 820                 }
 821
 822                 if( Buffer[i] < 128 )   // Plain ASCII
 823                         VT_int_PutChar(Term, Buffer[i]);
 824                 else {  // UTF-8
 825                         i += ReadUTF8(&Buffer[i], &val);
 826                         VT_int_PutChar(Term, val);
 827                 }
 828         }
 829         // Update Screen
 830         VT_int_UpdateScreen( Term, 0 );
 831
 832         // Update cursor
 833         if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
 834         {
 835                 tVideo_IOCtl_Pos        pos;
 836                 pos.x = Term->WritePos % Term->Width;
 837                 pos.y = Term->WritePos / Term->Width;
 838                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 839         }
 840 }
 841
 842 /**
 843  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 844  * \brief Write a single character to a VTerm
 845  */
 846 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 847 {
 848          int    i;
 849         //ENTER("pTerm xCh", Term, Ch);
 850         //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
 851
 852         switch(Ch)
 853         {
 854         case '\0':      return; // Ignore NULL byte
 855         case '\n':
 856                 VT_int_UpdateScreen( Term, 0 ); // Update the line before newlining
 857                 Term->WritePos += Term->Width;
 858         case '\r':
 859                 Term->WritePos -= Term->WritePos % Term->Width;
 860                 break;
 861
 862         case '\t':
 863                 do {
 864                         Term->Text[ Term->WritePos ].Ch = '\0';
 865                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 866                         Term->WritePos ++;
 867                 } while(Term->WritePos & 7);
 868                 break;
 869
 870         case '\b':
 871                 // Backspace is invalid at Offset 0
 872                 if(Term->WritePos == 0) break;
 873
 874                 Term->WritePos --;
 875                 // Singe Character
 876                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 877                         Term->Text[ Term->WritePos ].Ch = 0;
 878                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 879                         break;
 880                 }
 881                 // Tab
 882                 i = 7;  // Limit it to 8
 883                 do {
 884                         Term->Text[ Term->WritePos ].Ch = 0;
 885                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 886                         Term->WritePos --;
 887                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 888                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 889                         Term->WritePos ++;
 890                 break;
 891
 892         default:
 893                 Term->Text[ Term->WritePos ].Ch = Ch;
 894                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 895                 Term->WritePos ++;
 896                 break;
 897         }
 898
 899
 900         // Move Screen
 901         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 902         {
 903                  int    base, i;
 904                 Term->WritePos -= Term->Width;
 905
 906                 // Update view position
 907                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 908                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 909                 if(Term->ViewPos > base)        Term->ViewPos = base;
 910
 911                 // Scroll terminal cache
 912                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 913
 914                 // Scroll Back
 915                 memcpy(
 916                         Term->Text,
 917                         &Term->Text[Term->Width],
 918                         (Term->Width*Term->Height*VT_SCROLLBACK-Term->Width)*sizeof(tVT_Char)
 919                         );
 920
 921                 // Clear last row
 922                 for( i = 0; i < Term->Width; i ++ )
 923                 {
 924                         Term->Text[ base + i ].Ch = 0;
 925                         Term->Text[ base + i ].Colour = Term->CurColour;
 926                 }
 927
 928                 //LOG("Scrolled buffer");
 929                 VT_int_UpdateScreen( Term, 1 );
 930         }
 931         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 932         {
 933                 Term->ViewPos += Term->Width;
 934                 //LOG("Scrolled screen");
 935                 VT_int_UpdateScreen( Term, 1 );
 936         }
 937
 938         //LEAVE('-');
 939 }
 940
 941 /**
 942  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 943  * \brief Updates the video framebuffer
 944  */
 945 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 946 {
 947         // Only update if this is the current terminal
 948         if( Term != &gVT_Terminals[giVT_CurrentTerminal] )      return;
 949
 950         if( Term->Mode == TERM_MODE_TEXT )
 951         {
 952                 if(UpdateAll) {
 953                         //LOG("UpdateAll = 1");
 954                         //LOG("VFS_WriteAt(0x%x, 0, %i*sizeof(tVT_Char), &Term->Text[%i])",
 955                         //      giVT_OutputDevHandle, Term->Width*Term->Height, Term->ViewPos);
 956                         VFS_WriteAt(
 957                                 giVT_OutputDevHandle,
 958                                 0,
 959                                 Term->Width*Term->Height*sizeof(tVT_Char),
 960                                 &Term->Text[Term->ViewPos]
 961                                 );
 962                 } else {
 963                          int    pos = Term->WritePos - Term->WritePos % Term->Width;
 964                         //LOG("UpdateAll = 0");
 965                         //LOG("VFS_WriteAt(0x%x, %i*sizeof(tVT_Char), %i*sizeof(tVT_Char), &Term->Text[%i])",
 966                         //      giVT_OutputDevHandle, (pos - Term->ViewPos), Term->Width, pos);
 967                         VFS_WriteAt(
 968                                 giVT_OutputDevHandle,
 969                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
 970                                 Term->Width*sizeof(tVT_Char),
 971                                 &Term->Text[pos]
 972                                 );
 973                 }
 974         }
 975         else
 976         {
 977                 VFS_WriteAt(
 978                         giVT_OutputDevHandle,
 979                         0,
 980                         Term->Width*Term->Height*sizeof(Uint32),
 981                         &Term->Buffer
 982                         );
 983         }
 984 }
 985
 986 /**
 987  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 988  * \brief Change the mode of a VTerm
 989  */
 990 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 991 {
 992         switch(NewMode)
 993         {
 994         case TERM_MODE_TEXT:
 995                 free(Term->Buffer);
 996                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
 997                 break;
 998         case TERM_MODE_FB:
 999                 free(Term->Text);
1000                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
1001                 break;
1002         //case TERM_MODE_OPENGL:
1003         //      return;
1004         }
1005
1006         Term->Mode = NewMode;
1007 }
1008
1009 // ---
1010 // Font Render
1011 // ---
1012 #define MONOSPACE_FONT  10816
1013
1014 #if MONOSPACE_FONT == 10808     // 8x8
1015 # include "vterm_font_8x8.h"
1016 #elif MONOSPACE_FONT == 10816   // 8x16
1017 # include "vterm_font_8x16.h"
1018 #endif
1019
1020 // === PROTOTYPES ===
1021 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
1022
1023 // === GLOBALS ===
1024 int     giVT_CharWidth = FONT_WIDTH;
1025 int     giVT_CharHeight = FONT_HEIGHT;
1026
1027 // === CODE ===
1028 /**
1029  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1030  * \brief Render a font character
1031  */
1032 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1033 {
1034         Uint8   *font;
1035         Uint32  *buf = Buffer;
1036          int    x, y;
1037
1038         font = VT_Font_GetChar(Codepoint);
1039
1040         for(y = 0; y < FONT_HEIGHT; y ++)
1041         {
1042                 for(x = 0; x < FONT_WIDTH; x ++)
1043                 {
1044                         if(*font & (1 << (FONT_WIDTH-x-1)))
1045                                 buf[x] = FGC;
1046                         else
1047                                 buf[x] = BGC;
1048                 }
1049                 buf += Pitch;
1050                 font ++;
1051         }
1052 }
1053
1054 /**
1055  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1056  * \brief Converts a
1057  */
1058 Uint32 VT_Colour12to24(Uint16 Col12)
1059 {
1060         Uint32  ret;
1061          int    tmp;
1062         tmp = Col12 & 0xF;
1063         ret  = (tmp << 0) | (tmp << 4);
1064         tmp = (Col12 & 0xF0) >> 4;
1065         ret |= (tmp << 8) | (tmp << 12);
1066         tmp = (Col12 & 0xF00) >> 8;
1067         ret |= (tmp << 16) | (tmp << 20);
1068         return ret;
1069 }
1070
1071 /**
1072  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1073  * \brief Gets an index into the font array given a Unicode Codepoint
1074  * \note See http://en.wikipedia.org/wiki/CP437
1075  */
1076 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1077 {
1078          int    index = 0;
1079         if(Codepoint < 128)
1080                 return &VTermFont[Codepoint*FONT_HEIGHT];
1081         switch(Codepoint)
1082         {
1083         case 0xC7:      index = 128;    break;  // Ç
1084         case 0xFC:      index = 129;    break;  // ü
1085         case 0xE9:      index = 130;    break;  // é
1086         case 0xE2:      index = 131;    break;  // â
1087         case 0xE4:      index = 132;    break;  // ä
1088         case 0xE0:      index = 133;    break;  // à
1089         case 0xE5:      index = 134;    break;  // å
1090         case 0xE7:      index = 135;    break;  // ç
1091         case 0xEA:      index = 136;    break;  // ê
1092         case 0xEB:      index = 137;    break;  // ë
1093         case 0xE8:      index = 138;    break;  // è
1094         case 0xEF:      index = 139;    break;  // ï
1095         case 0xEE:      index = 140;    break;  // î
1096         case 0xEC:      index = 141;    break;  // ì
1097         case 0xC4:      index = 142;    break;  // Ä
1098         case 0xC5:      index = 143;    break;  // Å
1099         }
1100
1101         return &VTermFont[index*FONT_HEIGHT];
1102 }
1103
1104 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1105 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1106 EXPORT(VT_Font_Render);
1107 EXPORT(VT_Colour12to24);