Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #include <common.h>
   5 #include <fs_devfs.h>
   6 #include <modules.h>
   7 #include <tpl_drv_video.h>
   8 #include <tpl_drv_keyboard.h>
   9 #include <tpl_drv_terminal.h>
  10 #include <errno.h>
  11
  12 // === CONSTANTS ===
  13 #define VERSION ((0<<8)|(50))
  14
  15 #define NUM_VTS 4
  16 #define MAX_INPUT_CHARS32       64
  17 #define MAX_INPUT_CHARS8        (MAX_INPUT_CHARS32*4)
  18 #define VT_SCROLLBACK   1       // 2 Screens of text
  19 #define DEFAULT_OUTPUT  "VGA"
  20 //#define DEFAULT_OUTPUT        "/Devices/BochsGA"
  21 #define DEFAULT_INPUT   "PS2Keyboard"
  22 #define DEFAULT_WIDTH   80
  23 #define DEFAULT_HEIGHT  25
  24 #define DEFAULT_COLOUR  (VT_COL_BLACK|(0xAAA<<16))
  25
  26 #define VT_FLAG_HIDECSR 0x01
  27
  28 enum eVT_InModes {
  29         VT_INMODE_TEXT8,        // UTF-8 Text Mode (VT100 Emulation)
  30         VT_INMODE_TEXT32,       // UTF-32 Text Mode (Acess Native)
  31         NUM_VT_INMODES
  32 };
  33
  34 // === TYPES ===
  35 typedef struct {
  36          int    Mode;   //!< Current Mode (see ::eTplTerminal_Modes)
  37          int    Flags;  //!< Flags (see VT_FLAG_*)
  38         short   Width;  //!< Virtual Width
  39         short   Height; //!< Virtual Height
  40         short   RealWidth;      //!< Real Width
  41         short   RealHeight;     //!< Real Height
  42
  43          int    ViewPos;        //!< View Buffer Offset (Text Only)
  44          int    WritePos;       //!< Write Buffer Offset (Text Only)
  45         Uint32  CurColour;      //!< Current Text Colour
  46         char    Name[2];        //!< Name of the terminal
  47
  48          int    InputRead;      //!< Input buffer read position
  49          int    InputWrite;     //!< Input buffer write position
  50         char    InputBuffer[MAX_INPUT_CHARS8];
  51         union {
  52                 tVT_Char        *Text;
  53                 Uint32          *Buffer;
  54         };
  55         tVFS_Node       Node;
  56 } tVTerm;
  57
  58 // === PROTOTYPES ===
  59  int    VT_Install(char **Arguments);
  60 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  61 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  62  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  63 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  64 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  65  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  66 void    VT_SetTerminal(int ID);
  67 void    VT_KBCallBack(Uint32 Codepoint);
  68 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  69  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  70 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  71 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  72
  73 // === CONSTANTS ===
  74 const Uint16    caVT100Colours[] = {
  75                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  76                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  77         };
  78
  79 // === GLOBALS ===
  80 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
  81 tDevFS_Driver   gVT_DrvInfo = {
  82         NULL, "VTerm",
  83         {
  84         .Flags = VFS_FFLAG_DIRECTORY,
  85         .Size = NUM_VTS,
  86         .Inode = -1,
  87         .NumACLs = 0,
  88         .ReadDir = VT_ReadDir,
  89         .FindDir = VT_FindDir,
  90         .IOCtl = VT_Root_IOCtl
  91         }
  92 };
  93 // --- Terminals ---
  94 tVTerm  gVT_Terminals[NUM_VTS];
  95  int    giVT_CurrentTerminal = 0;
  96 // --- Driver Handles ---
  97 char    *gsVT_OutputDevice = NULL;
  98 char    *gsVT_InputDevice = NULL;
  99  int    giVT_OutputDevHandle = -2;
 100  int    giVT_InputDevHandle = -2;
 101 // --- Key States --- (Used for VT Switching/Magic Combos)
 102  int    gbVT_CtrlDown = 0;
 103  int    gbVT_AltDown = 0;
 104  int    gbVT_SysrqDown = 0;
 105
 106 // === CODE ===
 107 /**
 108  * \fn int VT_Install(char **Arguments)
 109  * \brief Installs the Virtual Terminal Driver
 110  */
 111 int VT_Install(char **Arguments)
 112 {
 113         char    **args = Arguments;
 114         char    *arg;
 115          int    i;
 116
 117         // Scan Arguments
 118         if(Arguments)
 119         {
 120                 for( ; (arg = *args); args++ )
 121                 {
 122                         if(arg[0] != '-')       continue;
 123
 124                         switch(arg[1])
 125                         {
 126                         // Set output device
 127                         case 'o':
 128                                 if(args[1] ==  NULL)    break;
 129                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 130                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 131                                 strcpy(gsVT_OutputDevice, args[1]);
 132                                 args ++;
 133                                 break;
 134
 135                         // Set input device
 136                         case 'i':
 137                                 if(args[1] == NULL)     break;
 138                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 139                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 140                                 strcpy(gsVT_InputDevice, args[1]);
 141                                 args ++;
 142                                 break;
 143
 144                         }
 145                 }
 146         }
 147
 148         // Apply Defaults
 149         if(!gsVT_OutputDevice)  gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
 150         if(!gsVT_InputDevice)   gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
 151
 152         LOG("Using '%s' as output", gsVT_OutputDevice);
 153         LOG("Using '%s' as input", gsVT_InputDevice);
 154
 155         // Create Nodes
 156         for( i = 0; i < NUM_VTS; i++ )
 157         {
 158                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 159                 gVT_Terminals[i].Flags = 0;
 160                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 161                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 162                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 163                 gVT_Terminals[i].WritePos = 0;
 164                 gVT_Terminals[i].ViewPos = 0;
 165
 166                 gVT_Terminals[i].Buffer = malloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK*sizeof(tVT_Char) );
 167                 memset( gVT_Terminals[i].Buffer, 0, DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK*sizeof(tVT_Char) );
 168
 169                 gVT_Terminals[i].Name[0] = '0'+i;
 170                 gVT_Terminals[i].Name[1] = '\0';
 171                 gVT_Terminals[i].Node.Inode = i;
 172                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 173                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 174
 175                 gVT_Terminals[i].Node.Read = VT_Read;
 176                 gVT_Terminals[i].Node.Write = VT_Write;
 177                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 178         }
 179
 180         // Add to DevFS
 181         DevFS_AddDevice( &gVT_DrvInfo );
 182
 183         return 0;
 184 }
 185
 186 /**
 187  * \fn void VT_InitOutput()
 188  * \brief Initialise Video Output
 189  */
 190 void VT_InitOutput()
 191 {
 192         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 193         LOG("giVT_OutputDevHandle = %x\n", giVT_OutputDevHandle);
 194         VT_SetTerminal( 0 );
 195 }
 196
 197 /**
 198  * \fn void VT_InitInput()
 199  * \brief Initialises the input
 200  */
 201 void VT_InitInput()
 202 {
 203         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 204         LOG("giVT_InputDevHandle = %x\n", giVT_InputDevHandle);
 205         if(giVT_InputDevHandle == -1)   return ;
 206         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 207 }
 208
 209 /**
 210  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 211  * \brief Read from the VTerm Directory
 212  */
 213 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 214 {
 215         if(Pos < 0)     return NULL;
 216         if(Pos >= NUM_VTS)      return NULL;
 217         return strdup( gVT_Terminals[Pos].Name );
 218 }
 219
 220 /**
 221  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 222  * \brief Find an item in the VTerm directory
 223  */
 224 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 225 {
 226          int    num;
 227
 228         //ENTER("pNode sName", Node, Name);
 229
 230         // Open the input and output files if needed
 231         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 232         if(giVT_InputDevHandle == -2)   VT_InitInput();
 233
 234         // Sanity check name
 235         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 236                 LEAVE('n');
 237                 return NULL;
 238         }
 239         // Get index
 240         num = Name[0] - '0';
 241         if(num >= NUM_VTS) {
 242                 LEAVE('n');
 243                 return NULL;
 244         }
 245         // Return node
 246         //LEAVE('p', &gVT_Terminals[num].Node);
 247         return &gVT_Terminals[num].Node;
 248 }
 249
 250 /**
 251  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 252  * \brief Control the VTerm Driver
 253  */
 254 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 255 {
 256          int    len;
 257         switch(Id)
 258         {
 259         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 260         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 261         case DRV_IOCTL_VERSION: return VERSION;
 262         case DRV_IOCTL_LOOKUP:  return 0;
 263
 264         case 4: // Get Video Driver
 265                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 266                 return strlen(gsVT_OutputDevice);
 267
 268         case 5: // Set Video Driver
 269                 if(!Data)       return -EINVAL;
 270                 if(Threads_GetUID() != 0)       return -EACCES;
 271
 272                 len = strlen(Data);
 273
 274                 free(gsVT_OutputDevice);
 275
 276                 gsVT_OutputDevice = malloc(len+1);
 277                 strcpy(gsVT_OutputDevice, Data);
 278
 279                 VFS_Close(giVT_OutputDevHandle);
 280                 giVT_OutputDevHandle = -1;
 281
 282                 VT_InitOutput();
 283                 return 1;
 284         }
 285         return 0;
 286 }
 287
 288 /**
 289  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 290  * \brief Read from a virtual terminal
 291  */
 292 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 293 {
 294          int    pos = 0;
 295         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 296
 297         // Check current mode
 298         switch(term->Mode)
 299         {
 300         case TERM_MODE_TEXT:
 301                 while(pos < Length)
 302                 {
 303                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 304
 305                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 306                         pos ++;
 307                         term->InputRead ++;
 308                         term->InputRead %= MAX_INPUT_CHARS8;
 309                 }
 310                 break;
 311
 312         case TERM_MODE_FB:
 313         case TERM_MODE_OPENGL:
 314                 while(pos < Length)
 315                 {
 316                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 317                         while(term->InputRead != term->InputWrite)
 318                         {
 319                                 ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 320                                 pos ++;
 321                                 term->InputRead ++;
 322                                 term->InputRead %= MAX_INPUT_CHARS32;
 323                         }
 324                 }
 325                 break;
 326         }
 327         return 0;
 328 }
 329
 330 /**
 331  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 332  * \brief Write to a virtual terminal
 333  */
 334 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 335 {
 336         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 337
 338         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 339
 340         // Write
 341         switch( term->Mode )
 342         {
 343         case TERM_MODE_TEXT:
 344                 VT_int_PutString(term, Buffer, Length);
 345                 break;
 346         }
 347
 348         //LEAVE('i', 0);
 349         return 0;
 350 }
 351
 352 /**
 353  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 354  * \brief Call an IO Control on a virtual terminal
 355  */
 356 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 357 {
 358          int    *iData = Data;
 359         tVTerm  *term = Node->ImplPtr;
 360         switch(Id)
 361         {
 362         case DRV_IOCTL_TYPE:    return DRV_TYPE_TERMINAL;
 363         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 364         case DRV_IOCTL_VERSION: return VERSION;
 365         case DRV_IOCTL_LOOKUP:  return 0;
 366
 367         // Get/Set the mode (and apply any changes)
 368         case TERM_IOCTL_MODETYPE:
 369                 if(Data == NULL)        return term->Mode;
 370                 term->Mode = *iData;
 371                 // Update the screen dimensions
 372                 if(giVT_CurrentTerminal == Node->Inode)
 373                         VT_SetTerminal( giVT_CurrentTerminal );
 374                 break;
 375
 376         // Get/set the terminal width
 377         case TERM_IOCTL_WIDTH:
 378                 if(Data == NULL)        return term->Width;
 379                 term->Width = *iData;
 380                 break;
 381
 382         // Get/set the terminal height
 383         case TERM_IOCTL_HEIGHT:
 384                 if(Data == NULL)        return term->Height;
 385                 term->Height = *iData;
 386                 break;
 387
 388         default:
 389                 return -1;
 390         }
 391         return 0;
 392 }
 393
 394 /**
 395  * \fn void VT_SetTerminal(int ID)
 396  * \brief Set the current terminal
 397  */
 398 void VT_SetTerminal(int ID)
 399 {
 400         tVideo_IOCtl_Mode       mode = {0};
 401          int    modeNum;
 402
 403         // Create the video mode
 404         mode.width = gVT_Terminals[ ID ].Width;
 405         mode.height = gVT_Terminals[ ID ].Height;
 406         // - Text Mode
 407         if(gVT_Terminals[ ID ].Mode == TERM_MODE_TEXT) {
 408                 mode.bpp = 12;
 409                 mode.flags = VIDEO_FLAG_TEXT;
 410         }
 411         // - Framebuffer or 3D
 412         else {
 413                 mode.bpp = 32;
 414                 mode.flags = 0;
 415         }
 416
 417         // Set video mode
 418         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 419         modeNum = mode.id;
 420         gVT_Terminals[ ID ].RealWidth = mode.width;
 421         gVT_Terminals[ ID ].RealHeight = mode.height;
 422         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETMODE, &modeNum );
 423 }
 424
 425 /**
 426  * \fn void VT_KBCallBack(Uint32 Codepoint)
 427  * \brief Called on keyboard interrupt
 428  */
 429 void VT_KBCallBack(Uint32 Codepoint)
 430 {
 431         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 432
 433         // How the hell did we get a Codepoint of zero?
 434         if(Codepoint == 0)      return;
 435
 436         // Key Up
 437         if( Codepoint & 0x80000000 )
 438         {
 439                 Codepoint &= 0x7FFFFFFF;
 440                 switch(Codepoint)
 441                 {
 442                 case KEY_LALT:
 443                 case KEY_RALT:
 444                         gbVT_AltDown = 0;
 445                         break;
 446                 case KEY_LCTRL:
 447                 case KEY_RCTRL:
 448                         gbVT_CtrlDown = 0;
 449                         break;
 450                 }
 451                 return;
 452         }
 453
 454         switch(Codepoint)
 455         {
 456         case KEY_LALT:
 457         case KEY_RALT:
 458                 gbVT_AltDown = 1;
 459                 break;
 460         case KEY_LCTRL:
 461         case KEY_RCTRL:
 462                 gbVT_CtrlDown = 1;
 463                 break;
 464
 465         default:
 466                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 467                         break;
 468                 switch(Codepoint)
 469                 {
 470                 case KEY_F1:
 471                         giVT_CurrentTerminal = 0;
 472                         break;
 473                 case KEY_F2:
 474                         giVT_CurrentTerminal = 0;
 475                         break;
 476                 case KEY_F3:
 477                         giVT_CurrentTerminal = 0;
 478                         break;
 479                 case KEY_F4:
 480                         giVT_CurrentTerminal = 0;
 481                         break;
 482                 }
 483                 return;
 484         }
 485
 486         // Encode key
 487         if(term->Mode == TERM_MODE_TEXT)
 488         {
 489                 Uint8   buf[6] = {0};
 490                  int    len;
 491
 492                 // Ignore Modifer Keys
 493                 if(Codepoint > KEY_MODIFIERS)   return;
 494
 495                 // Get UTF-8/ANSI Encoding
 496                 switch(Codepoint)
 497                 {
 498                 case KEY_LEFT:
 499                         buf[0] = '\x1B';        buf[1] = '[';
 500                         buf[2] = 'D';   len = 3;
 501                         break;
 502                 case KEY_RIGHT:
 503                         buf[0] = '\x1B';        buf[1] = '[';
 504                         buf[2] = 'C';   len = 3;
 505                         break;
 506                 default:
 507                         len = WriteUTF8( buf, Codepoint );
 508                         //Log("Codepoint = 0x%x", Codepoint);
 509                         break;
 510                 }
 511
 512                 //Log("len = %i, buf = %s", len, buf);
 513
 514                 // Write
 515                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 516                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 517                 else {
 518                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 519                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 520                 }
 521                 // Roll the buffer over
 522                 term->InputWrite += len;
 523                 term->InputWrite %= MAX_INPUT_CHARS8;
 524                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 525                         term->InputRead = term->InputWrite + 1;
 526                         term->InputRead %= MAX_INPUT_CHARS8;
 527                 }
 528
 529         }
 530         else
 531         {
 532                 // Encode the raw UTF-32 Key
 533                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 534                 term->InputWrite ++;
 535                 term->InputWrite %= MAX_INPUT_CHARS32;
 536                 if(term->InputRead == term->InputWrite) {
 537                         term->InputRead ++;
 538                         term->InputRead %= MAX_INPUT_CHARS32;
 539                 }
 540         }
 541 }
 542
 543 /**
 544  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 545  * \brief Print a string to the Virtual Terminal
 546  */
 547 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 548 {
 549         Uint32  val;
 550          int    i;
 551         for( i = 0; i < Count; i++ )
 552         {
 553                 if( Buffer[i] == 0x1B ) // Escape Sequence
 554                 {
 555                         i ++;
 556                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 557                         continue;
 558                 }
 559
 560                 if( Buffer[i] < 128 )   // Plain ASCII
 561                         VT_int_PutChar(Term, Buffer[i]);
 562                 else {  // UTF-8
 563                         i += ReadUTF8(&Buffer[i], &val);
 564                         VT_int_PutChar(Term, val);
 565                 }
 566         }
 567
 568         // Update cursor
 569         if( !(Term->Flags & VT_FLAG_HIDECSR) )
 570         {
 571                 tVideo_IOCtl_Pos        pos;
 572                 pos.x = Term->WritePos % Term->Width;
 573                 pos.y = Term->WritePos / Term->Width;
 574                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 575         }
 576 }
 577
 578 /**
 579  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 580  * \brief Clears a line in a virtual terminal
 581  */
 582 void VT_int_ClearLine(tVTerm *Term, int Num)
 583 {
 584          int    i;
 585         //ENTER("pTerm iNum", Term, Num);
 586         for( i = Term->Width; i--; )
 587         {
 588                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 589                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 590         }
 591         //LEAVE('-');
 592 }
 593
 594 /**
 595  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 596  * \brief Parses a VT100 Escape code
 597  */
 598 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 599 {
 600         char    c;
 601          int    argc = 0, j = 1;
 602          int    tmp;
 603          int    args[4] = {0,0,0,0};
 604
 605         switch(Buffer[0]) {
 606         //Large Code
 607         case '[':
 608                 // Get Arguments
 609                 c = Buffer[1];
 610                 do {
 611                         while('0' <= c && c <= '9') {
 612                                 args[argc] *= 10;
 613                                 args[argc] += c-'0';
 614                                 c = Buffer[++j];
 615                         }
 616                         if( j != 1 )    argc ++;
 617                 } while(c == ';');
 618
 619                 // Get string (what does this do?)
 620                 if(c == '"') {
 621                         c = Buffer[++j];
 622                         while(c != '"')
 623                                 c = Buffer[++j];
 624                 }
 625
 626                 // Get Command
 627                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 628                 {
 629                         switch(c)
 630                         {
 631                         // Left
 632                         case 'D':
 633                                 if(argc == 1)   tmp = args[0];
 634                                 else    tmp = 1;
 635
 636                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 637                                         Term->WritePos -= Term->WritePos % Term->Width;
 638                                 else
 639                                         Term->WritePos -= tmp;
 640                                 Log("Left by %i", tmp);
 641                                 break;
 642
 643                         // Right
 644                         case 'C':
 645                                 if(argc == 1)   tmp = args[0];
 646                                 else    tmp = 1;
 647                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 648                                         Term->WritePos -= Term->WritePos % Term->Width;
 649                                         Term->WritePos += Term->Width - 1;
 650                                 } else
 651                                         Term->WritePos += tmp;
 652                                 break;
 653
 654                         // Clear By Line
 655                         case 'J':
 656                                 // Clear Screen
 657                                 switch(args[0])
 658                                 {
 659                                 case 2:
 660                                         {
 661                                          int    i = Term->Height * VT_SCROLLBACK;
 662                                         while( i-- )    VT_int_ClearLine(Term, i);
 663                                         Term->WritePos = 0;
 664                                         Term->ViewPos = 0;
 665                                         VT_int_UpdateScreen(Term, 1);
 666                                         }
 667                                         break;
 668                                 }
 669                                 break;
 670                         // Set Font flags
 671                         case 'm':
 672                                 for( ; argc--; )
 673                                 {
 674                                         // Flags
 675                                         if( 0 <= args[argc] && args[argc] <= 8)
 676                                         {
 677                                                 switch(args[argc])
 678                                                 {
 679                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 680                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 681                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 682                                                 }
 683                                         }
 684                                         // Foreground Colour
 685                                         else if(30 <= args[argc] && args[argc] <= 37) {
 686                                                 Term->CurColour &= 0xF000FFFF;
 687                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 688                                         }
 689                                         // Background Colour
 690                                         else if(40 <= args[argc] && args[argc] <= 47) {
 691                                                 Term->CurColour &= 0xFFFF8000;
 692                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 693                                         }
 694                                 }
 695                                 break;
 696                         }
 697                 }
 698                 break;
 699
 700         default:
 701                 break;
 702         }
 703
 704         return j + 1;
 705 }
 706
 707 /**
 708  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 709  * \brief Write a single character to a VTerm
 710  */
 711 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 712 {
 713          int    i;
 714         //ENTER("pTerm xCh", Term, Ch);
 715         //LOG("Term = {WritePos:%i, ViewPos:%i}\n", Term->WritePos, Term->ViewPos);
 716
 717         switch(Ch)
 718         {
 719         case '\0':      return; // Ignore NULL byte
 720         case '\n':
 721                 Term->WritePos += Term->Width;
 722         case '\r':
 723                 Term->WritePos -= Term->WritePos % Term->Width;
 724                 break;
 725
 726         case '\t':
 727                 do {
 728                         Term->Text[ Term->WritePos ].Ch = '\0';
 729                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 730                         Term->WritePos ++;
 731                 } while(Term->WritePos & 7);
 732                 break;
 733
 734         case '\b':
 735                 // Backspace is invalid at Offset 0
 736                 if(Term->WritePos == 0) break;
 737
 738                 Term->WritePos --;
 739                 // Singe Character
 740                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 741                         Term->Text[ Term->WritePos ].Ch = 0;
 742                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 743                         break;
 744                 }
 745                 // Tab
 746                 i = 7;  // Limit it to 8
 747                 do {
 748                         Term->Text[ Term->WritePos ].Ch = 0;
 749                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 750                         Term->WritePos --;
 751                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 752                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 753                         Term->WritePos ++;
 754                 break;
 755
 756         default:
 757                 Term->Text[ Term->WritePos ].Ch = Ch;
 758                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 759                 Term->WritePos ++;
 760                 break;
 761         }
 762
 763
 764         // Move Screen
 765         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 766         {
 767                  int    base, i;
 768                 Term->WritePos -= Term->Width;
 769
 770                 // Update view position
 771                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 772                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 773                 if(Term->ViewPos > base)        Term->ViewPos = base;
 774
 775                 // Scroll terminal cache
 776                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 777
 778                 // Scroll Back
 779                 memcpy(
 780                         Term->Text,
 781                         &Term->Text[Term->Width],
 782                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 783                         );
 784
 785                 // Clear last row
 786                 for( i = 0; i < Term->Width; i ++ )
 787                 {
 788                         Term->Text[ base + i ].Ch = 0;
 789                         Term->Text[ base + i ].Colour = Term->CurColour;
 790                 }
 791
 792                 VT_int_UpdateScreen( Term, 1 );
 793         }
 794         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 795         {
 796                 Term->ViewPos += Term->Width;
 797                 VT_int_UpdateScreen( Term, 1 );
 798         }
 799         else
 800                 VT_int_UpdateScreen( Term, 0 );
 801
 802         //LEAVE('-');
 803 }
 804
 805 /**
 806  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 807  * \brief Updates the video framebuffer
 808  */
 809 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 810 {
 811         if(UpdateAll) {
 812                 VFS_WriteAt(
 813                         giVT_OutputDevHandle,
 814                         0,
 815                         Term->Width*Term->Height*sizeof(tVT_Char),
 816                         &Term->Text[Term->ViewPos]
 817                         );
 818         } else {
 819                  int    pos = Term->WritePos - Term->WritePos % Term->Width;
 820                 VFS_WriteAt(
 821                         giVT_OutputDevHandle,
 822                         (pos - Term->ViewPos)*sizeof(tVT_Char),
 823                         Term->Width*sizeof(tVT_Char),
 824                         &Term->Text[pos]
 825                         );
 826         }
 827 }
 828
 829 // ---
 830 // Font Render
 831 // ---
 832 #define MONOSPACE_FONT  10816
 833
 834 #if MONOSPACE_FONT == 10808     // 8x8
 835 # include "vterm_font_8x8.h"
 836 #elif MONOSPACE_FONT == 10816   // 8x16
 837 # include "vterm_font_8x16.h"
 838 #endif
 839
 840 // === PROTOTYPES ===
 841 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
 842
 843 // === GLOBALS ===
 844 int     giVT_CharWidth = FONT_WIDTH;
 845 int     giVT_CharHeight = FONT_HEIGHT;
 846
 847 // === CODE ===
 848 /**
 849  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 850  * \brief Render a font character
 851  */
 852 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 853 {
 854         Uint8   *font;
 855         Uint32  *buf = Buffer;
 856          int    x, y;
 857         font = VT_Font_GetChar(Codepoint);
 858
 859         for(y = 0; y < FONT_HEIGHT; y ++)
 860         {
 861                 for(x = 0; x < FONT_WIDTH; x ++)
 862                 {
 863                         if(*font & (1 << (FONT_WIDTH-x)))
 864                                 buf[x] = FGC;
 865                         else
 866                                 buf[x] = BGC;
 867                 }
 868                 buf += Pitch;
 869                 font ++;
 870         }
 871 }
 872
 873 /**
 874  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
 875  * \brief Converts a
 876  */
 877 Uint32 VT_Colour12to24(Uint16 Col12)
 878 {
 879         Uint32  ret;
 880          int    tmp;
 881         tmp = Col12 & 0xF;
 882         ret  = (tmp << 0) | (tmp << 4);
 883         tmp = (Col12 & 0xF0) >> 4;
 884         ret |= (tmp << 8) | (tmp << 12);
 885         tmp = (Col12 & 0xF00) >> 8;
 886         ret |= (tmp << 16) | (tmp << 20);
 887         return ret;
 888 }
 889
 890 /**
 891  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 892  * \brief Gets an index into the font array given a Unicode Codepoint
 893  * \note See http://en.wikipedia.org/wiki/CP437
 894  */
 895 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 896 {
 897          int    index = 0;
 898         if(Codepoint < 128)
 899                 return &VTermFont[Codepoint*FONT_HEIGHT];
 900         switch(Codepoint)
 901         {
 902         case 0xC7:      index = 128;    break;  // Ç
 903         case 0xFC:      index = 129;    break;  // ü
 904         case 0xE9:      index = 130;    break;  // é
 905         case 0xE2:      index = 131;    break;  // â
 906         case 0xE4:      index = 132;    break;  // ä
 907         case 0xE0:      index = 133;    break;  // à
 908         case 0xE5:      index = 134;    break;  // å
 909         case 0xE7:      index = 135;    break;  // ç
 910         case 0xEA:      index = 136;    break;  // ê
 911         case 0xEB:      index = 137;    break;  // ë
 912         case 0xE8:      index = 138;    break;  // è
 913         case 0xEF:      index = 139;    break;  // ï
 914         case 0xEE:      index = 140;    break;  // î
 915         case 0xEC:      index = 141;    break;  // ì
 916         case 0xC4:      index = 142;    break;  // Ä
 917         case 0xC5:      index = 143;    break;  // Å
 918         }
 919
 920         return &VTermFont[index*FONT_HEIGHT];
 921 }
 922
 923 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
 924 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
 925 EXPORT(VT_Font_Render);
 926 EXPORT(VT_Colour12to24);