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