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