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          int    size;
 357
 358         // Write
 359         switch( term->Mode )
 360         {
 361         case TERM_MODE_TEXT:
 362                 VT_int_PutString(term, Buffer, Length);
 363                 break;
 364         case TERM_MODE_FB:
 365                 size = term->Width*term->Height*4;
 366                 if( Offset > size ) {
 367                         Log_Notice("VTerm", "VT_Write: Offset (0x%llx) > FBSize (0x%x)",
 368                                 Offset, size);
 369                         return 0;
 370                 }
 371
 372                 if( Offset + Length > size ) {
 373                         Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
 374                                 Offset+Length, size);
 375                         Length = size - Offset;
 376                 }
 377
 378                 memcpy( (void*)((Uint)term->Buffer + (Uint)Offset), Buffer, Length );
 379
 380                 if( Node->Inode == giVT_CurrentTerminal )
 381                 {
 382                         if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
 383                         {
 384                                 #if 0
 385                                  int    x, y, h;
 386                                 x = Offset/4;   y = x / term->Width;    x %= term->Width;
 387                                 w = Length/4+x; h = w / term->Width;    w %= term->Width;
 388                                 while(h--)
 389                                 {
 390                                         VFS_WriteAt( giVT_OutputDevHandle,
 391                                                 (x+y*term->RealWidth)*4,
 392                                                 term->Width * 4,
 393                                                 Buffer
 394                                                 );
 395                                         Buffer = (void*)( (Uint)Buffer + term->Width*term->Height*4 );
 396                                 }
 397                                 #endif
 398                                 return 0;
 399                         }
 400                         else {
 401                                 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 402                         }
 403                 }
 404         }
 405
 406         return 0;
 407 }
 408
 409 /**
 410  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 411  * \brief Call an IO Control on a virtual terminal
 412  */
 413 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 414 {
 415          int    *iData = Data;
 416         tVTerm  *term = Node->ImplPtr;
 417         ENTER("pNode iId pData", Node, Id, Data);
 418
 419         if(Id >= DRV_IOCTL_LOOKUP) {
 420                 // Only root can fiddle with graphics modes
 421                 // TODO: Remove this and replace with user ownership
 422                 if( Threads_GetUID() != 0 )     return -1;
 423         }
 424
 425         switch(Id)
 426         {
 427         case DRV_IOCTL_TYPE:
 428                 LEAVE('i', DRV_TYPE_TERMINAL);
 429                 return DRV_TYPE_TERMINAL;
 430         case DRV_IOCTL_IDENT:
 431                 memcpy(Data, "VT\0\0", 4);
 432                 LEAVE('i', 0);
 433                 return 0;
 434         case DRV_IOCTL_VERSION:
 435                 LEAVE('x', VERSION);
 436                 return VERSION;
 437         case DRV_IOCTL_LOOKUP:
 438                 LEAVE('i', 0);
 439                 return 0;
 440
 441         // Get/Set the mode (and apply any changes)
 442         case TERM_IOCTL_MODETYPE:
 443                 if(Data != NULL)
 444                 {
 445                         Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
 446                         // Update mode if needed
 447                         if(term->Mode != *iData)
 448                                 VT_int_ChangeMode(term, *iData);
 449
 450                         // Update the screen dimensions
 451                         if(Node->Inode == giVT_CurrentTerminal)
 452                                 VT_SetTerminal( giVT_CurrentTerminal );
 453                 }
 454                 LEAVE('i', term->Mode);
 455                 return term->Mode;
 456
 457         // Get/set the terminal width
 458         case TERM_IOCTL_WIDTH:
 459                 if(Data != NULL)        term->Width = *iData;
 460                 Log("VT_Terminal_IOCtl - RETURN term->Width = %i", term->Width);
 461                 LEAVE('i', term->Width);
 462                 return term->Width;
 463
 464         // Get/set the terminal height
 465         case TERM_IOCTL_HEIGHT:
 466                 if(Data != NULL)        term->Height = *iData;
 467                 Log("VT_Terminal_IOCtl - RETURN term->Height = %i", term->Height);
 468                 LEAVE('i', term->Height);
 469                 return term->Height;
 470
 471         case TERM_IOCTL_FORCESHOW:
 472                 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
 473                         Threads_GetTID(), (int)Node->Inode);
 474                 VT_SetTerminal( Node->Inode );
 475                 LEAVE('i', 1);
 476                 return 1;
 477         }
 478         LEAVE('i', -1);
 479         return -1;
 480 }
 481
 482 void VT_SetResolution(int IsTextMode, int Width, int Height)
 483 {
 484         tVideo_IOCtl_Mode       mode = {0};
 485          int    tmp;
 486
 487         // Create the video mode
 488         mode.width = Width;
 489         mode.height = Height;
 490         mode.bpp = 32;
 491         mode.flags = 0;
 492
 493         // Set video mode
 494         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 495         tmp = mode.id;
 496         giVT_RealWidth = mode.width;
 497         giVT_RealHeight = mode.height;
 498         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 499
 500         tmp = IsTextMode ? VIDEO_BUFFMT_TEXT : VIDEO_BUFFMT_FRAMEBUFFER;
 501         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp );
 502 }
 503
 504 /**
 505  * \fn void VT_SetTerminal(int ID)
 506  * \brief Set the current terminal
 507  */
 508 void VT_SetTerminal(int ID)
 509 {
 510         // Update current terminal ID
 511         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 512         giVT_CurrentTerminal = ID;
 513         gpVT_CurTerm = &gVT_Terminals[ID];
 514
 515         // Update cursor
 516         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT && !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
 517         {
 518                 tVideo_IOCtl_Pos        pos;
 519                 pos.x = gpVT_CurTerm->WritePos % gpVT_CurTerm->Width;
 520                 pos.y = gpVT_CurTerm->WritePos / gpVT_CurTerm->Width;
 521                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 522         }
 523
 524         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 525                 VT_SetResolution( 1, gpVT_CurTerm->Width*giVT_CharWidth, gpVT_CurTerm->Height*giVT_CharHeight );
 526         else
 527                 VT_SetResolution( 0, gpVT_CurTerm->Width, gpVT_CurTerm->Height );
 528
 529         // Update the screen
 530         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 531 }
 532
 533 /**
 534  * \fn void VT_KBCallBack(Uint32 Codepoint)
 535  * \brief Called on keyboard interrupt
 536  * \param Codepoint     Pseudo-UTF32 character
 537  *
 538  * Handles a key press and sends the key code to the user's buffer.
 539  * If the code creates a kernel-magic sequence, it is not passed to the
 540  * user and is handled in-kernel.
 541  */
 542 void VT_KBCallBack(Uint32 Codepoint)
 543 {
 544         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 545
 546         // How the hell did we get a Codepoint of zero?
 547         if(Codepoint == 0)      return;
 548
 549         // Key Up
 550         if( Codepoint & 0x80000000 )
 551         {
 552                 Codepoint &= 0x7FFFFFFF;
 553                 switch(Codepoint)
 554                 {
 555                 #if !USE_CTRL_ALT
 556                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 557                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 558                 #else
 559                 case KEY_LALT:
 560                 case KEY_RALT:
 561                         gbVT_AltDown = 0;
 562                         break;
 563                 case KEY_LCTRL:
 564                 case KEY_RCTRL:
 565                         gbVT_CtrlDown = 0;
 566                         break;
 567                 #endif
 568                 }
 569                 return;
 570         }
 571
 572         switch(Codepoint)
 573         {
 574         #if !USE_CTRL_ALT
 575         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 576         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 577         #else
 578         case KEY_LALT:
 579         case KEY_RALT:
 580                 gbVT_AltDown = 1;
 581                 break;
 582         case KEY_LCTRL:
 583         case KEY_RCTRL:
 584                 gbVT_CtrlDown = 1;
 585                 break;
 586         #endif
 587
 588         default:
 589                 #if USE_CTRL_ALT
 590                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 591                         break;
 592                 #endif
 593                 switch(Codepoint)
 594                 {
 595                 case KEY_F1:    VT_SetTerminal(0);      return;
 596                 case KEY_F2:    VT_SetTerminal(1);      return;
 597                 case KEY_F3:    VT_SetTerminal(2);      return;
 598                 case KEY_F4:    VT_SetTerminal(3);      return;
 599                 case KEY_F5:    VT_SetTerminal(4);      return;
 600                 case KEY_F6:    VT_SetTerminal(5);      return;
 601                 case KEY_F7:    VT_SetTerminal(6);      return;
 602                 case KEY_F8:    VT_SetTerminal(7);      return;
 603                 case KEY_F9:    VT_SetTerminal(8);      return;
 604                 case KEY_F10:   VT_SetTerminal(9);      return;
 605                 case KEY_F11:   VT_SetTerminal(10);     return;
 606                 case KEY_F12:   VT_SetTerminal(11);     return;
 607                 case KEY_PGUP:
 608                         if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
 609                                 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
 610                         else
 611                                 gpVT_CurTerm->ViewPos = 0;
 612                         return;
 613                 case KEY_PGDOWN:
 614                         if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1)) )
 615                                 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
 616                         else
 617                                 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1));
 618                         return;
 619                 }
 620         }
 621
 622         // Encode key
 623         if(term->Mode == TERM_MODE_TEXT)
 624         {
 625                 Uint8   buf[6] = {0};
 626                  int    len = 0;
 627
 628                 // Ignore Modifer Keys
 629                 if(Codepoint > KEY_MODIFIERS)   return;
 630
 631                 // Get UTF-8/ANSI Encoding
 632                 switch(Codepoint)
 633                 {
 634                 case KEY_LEFT:
 635                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 636                         len = 3;
 637                         break;
 638                 case KEY_RIGHT:
 639                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 640                         len = 3;
 641                         break;
 642                 case KEY_UP:
 643                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 644                         len = 3;
 645                         break;
 646                 case KEY_DOWN:
 647                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 648                         len = 3;
 649                         break;
 650
 651                 case KEY_PGUP:
 652                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 653                         //len = 4;      // Commented out until I'm sure
 654                         break;
 655                 case KEY_PGDOWN:
 656                         len = 0;
 657                         break;
 658
 659                 // Attempt to encode in UTF-8
 660                 default:
 661                         len = WriteUTF8( buf, Codepoint );
 662                         if(len == 0) {
 663                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 664                         }
 665                         break;
 666                 }
 667
 668                 if(len == 0) {
 669                         // Unprintable / Don't Pass
 670                         return;
 671                 }
 672
 673                 // Write
 674                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 675                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 676                 else {
 677                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 678                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 679                 }
 680                 // Roll the buffer over
 681                 term->InputWrite += len;
 682                 term->InputWrite %= MAX_INPUT_CHARS8;
 683                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 684                         term->InputRead = term->InputWrite + 1;
 685                         term->InputRead %= MAX_INPUT_CHARS8;
 686                 }
 687
 688         }
 689         else
 690         {
 691                 // Encode the raw UTF-32 Key
 692                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 693                 term->InputWrite ++;
 694                 term->InputWrite %= MAX_INPUT_CHARS32;
 695                 if(term->InputRead == term->InputWrite) {
 696                         term->InputRead ++;
 697                         term->InputRead %= MAX_INPUT_CHARS32;
 698                 }
 699         }
 700 }
 701
 702 /**
 703  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 704  * \brief Clears a line in a virtual terminal
 705  */
 706 void VT_int_ClearLine(tVTerm *Term, int Num)
 707 {
 708          int    i;
 709         //ENTER("pTerm iNum", Term, Num);
 710         for( i = Term->Width; i--; )
 711         {
 712                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 713                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 714         }
 715         //LEAVE('-');
 716 }
 717
 718 /**
 719  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 720  * \brief Parses a VT100 Escape code
 721  */
 722 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 723 {
 724         char    c;
 725          int    argc = 0, j = 1;
 726          int    tmp;
 727          int    args[4] = {0,0,0,0};
 728
 729         switch(Buffer[0]) {
 730         //Large Code
 731         case '[':
 732                 // Get Arguments
 733                 c = Buffer[1];
 734                 do {
 735                         while('0' <= c && c <= '9') {
 736                                 args[argc] *= 10;
 737                                 args[argc] += c-'0';
 738                                 c = Buffer[++j];
 739                         }
 740                         if( j != 1 )    argc ++;
 741                 } while(c == ';');
 742
 743                 // Get string (what does this do?)
 744                 if(c == '"') {
 745                         c = Buffer[++j];
 746                         while(c != '"')
 747                                 c = Buffer[++j];
 748                 }
 749
 750                 // Get Command
 751                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 752                 {
 753                         switch(c)
 754                         {
 755                         // Left
 756                         case 'D':
 757                                 if(argc == 1)   tmp = args[0];
 758                                 else    tmp = 1;
 759
 760                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 761                                         Term->WritePos -= Term->WritePos % Term->Width;
 762                                 else
 763                                         Term->WritePos -= tmp;
 764                                 break;
 765
 766                         // Right
 767                         case 'C':
 768                                 if(argc == 1)   tmp = args[0];
 769                                 else    tmp = 1;
 770                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 771                                         Term->WritePos -= Term->WritePos % Term->Width;
 772                                         Term->WritePos += Term->Width - 1;
 773                                 } else
 774                                         Term->WritePos += tmp;
 775                                 break;
 776
 777                         // Clear By Line
 778                         case 'J':
 779                                 // Clear Screen
 780                                 switch(args[0])
 781                                 {
 782                                 case 2:
 783                                         {
 784                                          int    i = Term->Height * VT_SCROLLBACK;
 785                                         while( i-- )    VT_int_ClearLine(Term, i);
 786                                         Term->WritePos = 0;
 787                                         Term->ViewPos = 0;
 788                                         VT_int_UpdateScreen(Term, 1);
 789                                         }
 790                                         break;
 791                                 }
 792                                 break;
 793                         // Set Font flags
 794                         case 'm':
 795                                 for( ; argc--; )
 796                                 {
 797                                         // Flags
 798                                         if( 0 <= args[argc] && args[argc] <= 8)
 799                                         {
 800                                                 switch(args[argc])
 801                                                 {
 802                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 803                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 804                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 805                                                 }
 806                                         }
 807                                         // Foreground Colour
 808                                         else if(30 <= args[argc] && args[argc] <= 37) {
 809                                                 Term->CurColour &= 0xF000FFFF;
 810                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 811                                         }
 812                                         // Background Colour
 813                                         else if(40 <= args[argc] && args[argc] <= 47) {
 814                                                 Term->CurColour &= 0xFFFF8000;
 815                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 816                                         }
 817                                 }
 818                                 break;
 819                         }
 820                 }
 821                 break;
 822
 823         default:
 824                 break;
 825         }
 826
 827         return j + 1;
 828 }
 829
 830 /**
 831  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 832  * \brief Print a string to the Virtual Terminal
 833  */
 834 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 835 {
 836         Uint32  val;
 837          int    i;
 838         for( i = 0; i < Count; i++ )
 839         {
 840                 if( Buffer[i] == 0x1B ) // Escape Sequence
 841                 {
 842                         i ++;
 843                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 844                         continue;
 845                 }
 846
 847                 if( Buffer[i] < 128 )   // Plain ASCII
 848                         VT_int_PutChar(Term, Buffer[i]);
 849                 else {  // UTF-8
 850                         i += ReadUTF8(&Buffer[i], &val);
 851                         VT_int_PutChar(Term, val);
 852                 }
 853         }
 854         // Update Screen
 855         VT_int_UpdateScreen( Term, 0 );
 856
 857         // Update cursor
 858         if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
 859         {
 860                 tVideo_IOCtl_Pos        pos;
 861                 pos.x = Term->WritePos % Term->Width;
 862                 pos.y = Term->WritePos / Term->Width;
 863                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 864         }
 865 }
 866
 867 /**
 868  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 869  * \brief Write a single character to a VTerm
 870  */
 871 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 872 {
 873          int    i;
 874         //ENTER("pTerm xCh", Term, Ch);
 875         //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
 876
 877         switch(Ch)
 878         {
 879         case '\0':      return; // Ignore NULL byte
 880         case '\n':
 881                 VT_int_UpdateScreen( Term, 0 ); // Update the line before newlining
 882                 Term->WritePos += Term->Width;
 883         case '\r':
 884                 Term->WritePos -= Term->WritePos % Term->Width;
 885                 break;
 886
 887         case '\t':
 888                 do {
 889                         Term->Text[ Term->WritePos ].Ch = '\0';
 890                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 891                         Term->WritePos ++;
 892                 } while(Term->WritePos & 7);
 893                 break;
 894
 895         case '\b':
 896                 // Backspace is invalid at Offset 0
 897                 if(Term->WritePos == 0) break;
 898
 899                 Term->WritePos --;
 900                 // Singe Character
 901                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 902                         Term->Text[ Term->WritePos ].Ch = 0;
 903                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 904                         break;
 905                 }
 906                 // Tab
 907                 i = 7;  // Limit it to 8
 908                 do {
 909                         Term->Text[ Term->WritePos ].Ch = 0;
 910                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 911                         Term->WritePos --;
 912                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 913                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 914                         Term->WritePos ++;
 915                 break;
 916
 917         default:
 918                 Term->Text[ Term->WritePos ].Ch = Ch;
 919                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 920                 Term->WritePos ++;
 921                 break;
 922         }
 923
 924
 925         // Move Screen
 926         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 927         {
 928                  int    base, i;
 929                 Term->WritePos -= Term->Width;
 930
 931                 // Update view position
 932                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 933                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 934                 if(Term->ViewPos > base)        Term->ViewPos = base;
 935
 936                 // Scroll terminal cache
 937                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 938
 939                 // Scroll Back
 940                 memcpy(
 941                         Term->Text,
 942                         &Term->Text[Term->Width],
 943                         (Term->Width*Term->Height*VT_SCROLLBACK-Term->Width)*sizeof(tVT_Char)
 944                         );
 945
 946                 // Clear last row
 947                 for( i = 0; i < Term->Width; i ++ )
 948                 {
 949                         Term->Text[ base + i ].Ch = 0;
 950                         Term->Text[ base + i ].Colour = Term->CurColour;
 951                 }
 952
 953                 //LOG("Scrolled buffer");
 954                 VT_int_UpdateScreen( Term, 1 );
 955         }
 956         else if(Term->WritePos >= Term->Width*Term->Height+Term->ViewPos)
 957         {
 958                 Term->ViewPos += Term->Width;
 959                 //LOG("Scrolled screen");
 960                 VT_int_UpdateScreen( Term, 1 );
 961         }
 962
 963         //LEAVE('-');
 964 }
 965
 966 /**
 967  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 968  * \brief Updates the video framebuffer
 969  */
 970 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 971 {
 972         // Only update if this is the current terminal
 973         if( Term != gpVT_CurTerm )      return;
 974
 975         switch( Term->Mode )
 976         {
 977         case TERM_MODE_TEXT:
 978                 if(UpdateAll) {
 979                         //LOG("UpdateAll = 1");
 980                         //LOG("VFS_WriteAt(0x%x, 0, %i*sizeof(tVT_Char), &Term->Text[%i])",
 981                         //      giVT_OutputDevHandle, Term->Width*Term->Height, Term->ViewPos);
 982                         VFS_WriteAt(
 983                                 giVT_OutputDevHandle,
 984                                 0,
 985                                 Term->Width*Term->Height*sizeof(tVT_Char),
 986                                 &Term->Text[Term->ViewPos]
 987                                 );
 988                 } else {
 989                          int    pos = Term->WritePos - Term->WritePos % Term->Width;
 990                         //LOG("UpdateAll = 0");
 991                         //LOG("VFS_WriteAt(0x%x, %i*sizeof(tVT_Char), %i*sizeof(tVT_Char), &Term->Text[%i])",
 992                         //      giVT_OutputDevHandle, (pos - Term->ViewPos), Term->Width, pos);
 993                         VFS_WriteAt(
 994                                 giVT_OutputDevHandle,
 995                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
 996                                 Term->Width*sizeof(tVT_Char),
 997                                 &Term->Text[pos]
 998                                 );
 999                 }
1000                 break;
1001         case TERM_MODE_FB:
1002                 VFS_WriteAt(
1003                         giVT_OutputDevHandle,
1004                         0,
1005                         Term->Width*Term->Height*sizeof(Uint32),
1006                         Term->Buffer
1007                         );
1008                 break;
1009         }
1010 }
1011
1012 /**
1013  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
1014  * \brief Change the mode of a VTerm
1015  */
1016 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
1017 {
1018         switch(NewMode)
1019         {
1020         case TERM_MODE_TEXT:
1021                 Log_Log("VTerm", "Set VT %p to text mode", Term);
1022                 free(Term->Buffer);
1023                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
1024                 break;
1025         case TERM_MODE_FB:
1026                 Log_Log("VTerm", "Set VT %p to framebuffer mode (%ix%i)", Term,
1027                         Term->Width, Term->Height);
1028                 free(Term->Text);
1029                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
1030                 Log_Debug("VTerm", "Term->Buffer = %p", Term->Buffer);
1031                 break;
1032         //case TERM_MODE_2DACCEL:
1033         //case TERM_MODE_3DACCEL:
1034         //      return;
1035         }
1036
1037         Term->Mode = NewMode;
1038 }
1039
1040 // ---
1041 // Font Render
1042 // ---
1043 #define MONOSPACE_FONT  10816
1044
1045 #if MONOSPACE_FONT == 10808     // 8x8
1046 # include "vterm_font_8x8.h"
1047 #elif MONOSPACE_FONT == 10816   // 8x16
1048 # include "vterm_font_8x16.h"
1049 #endif
1050
1051 // === PROTOTYPES ===
1052 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
1053
1054 // === GLOBALS ===
1055 int     giVT_CharWidth = FONT_WIDTH;
1056 int     giVT_CharHeight = FONT_HEIGHT;
1057
1058 // === CODE ===
1059 /**
1060  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1061  * \brief Render a font character
1062  */
1063 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1064 {
1065         Uint8   *font;
1066         Uint32  *buf = Buffer;
1067          int    x, y;
1068
1069         font = VT_Font_GetChar(Codepoint);
1070
1071         for(y = 0; y < FONT_HEIGHT; y ++)
1072         {
1073                 for(x = 0; x < FONT_WIDTH; x ++)
1074                 {
1075                         if(*font & (1 << (FONT_WIDTH-x-1)))
1076                                 buf[x] = FGC;
1077                         else
1078                                 buf[x] = BGC;
1079                 }
1080                 buf += Pitch;
1081                 font ++;
1082         }
1083 }
1084
1085 /**
1086  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1087  * \brief Converts a
1088  */
1089 Uint32 VT_Colour12to24(Uint16 Col12)
1090 {
1091         Uint32  ret;
1092          int    tmp;
1093         tmp = Col12 & 0xF;
1094         ret  = (tmp << 0) | (tmp << 4);
1095         tmp = (Col12 & 0xF0) >> 4;
1096         ret |= (tmp << 8) | (tmp << 12);
1097         tmp = (Col12 & 0xF00) >> 8;
1098         ret |= (tmp << 16) | (tmp << 20);
1099         return ret;
1100 }
1101
1102 /**
1103  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1104  * \brief Gets an index into the font array given a Unicode Codepoint
1105  * \note See http://en.wikipedia.org/wiki/CP437
1106  */
1107 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1108 {
1109          int    index = 0;
1110         if(Codepoint < 128)
1111                 return &VTermFont[Codepoint*FONT_HEIGHT];
1112         switch(Codepoint)
1113         {
1114         case 0xC7:      index = 128;    break;  // Ç
1115         case 0xFC:      index = 129;    break;  // ü
1116         case 0xE9:      index = 130;    break;  // é
1117         case 0xE2:      index = 131;    break;  // â
1118         case 0xE4:      index = 132;    break;  // ä
1119         case 0xE0:      index = 133;    break;  // à
1120         case 0xE5:      index = 134;    break;  // å
1121         case 0xE7:      index = 135;    break;  // ç
1122         case 0xEA:      index = 136;    break;  // ê
1123         case 0xEB:      index = 137;    break;  // ë
1124         case 0xE8:      index = 138;    break;  // è
1125         case 0xEF:      index = 139;    break;  // ï
1126         case 0xEE:      index = 140;    break;  // î
1127         case 0xEC:      index = 141;    break;  // ì
1128         case 0xC4:      index = 142;    break;  // Ä
1129         case 0xC5:      index = 143;    break;  // Å
1130         }
1131
1132         return &VTermFont[index*FONT_HEIGHT];
1133 }
1134
1135 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1136 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1137 EXPORT(VT_Font_Render);
1138 EXPORT(VT_Colour12to24);