Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #define DEBUG   1
   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   1       // 2 Screens of text
  22 #define DEFAULT_OUTPUT  "VGA"
  23 //#define DEFAULT_OUTPUT        "BochsGA"
  24 #define DEFAULT_INPUT   "PS2Keyboard"
  25 #define DEFAULT_WIDTH   80
  26 #define DEFAULT_HEIGHT  25
  27 #define DEFAULT_COLOUR  (VT_COL_BLACK|(0xAAA<<16))
  28
  29 #define VT_FLAG_HIDECSR 0x01
  30 #define VT_FLAG_HASFB   0x10    //!< Set if the VTerm has requested the Framebuffer
  31
  32 enum eVT_InModes {
  33         VT_INMODE_TEXT8,        // UTF-8 Text Mode (VT100 Emulation)
  34         VT_INMODE_TEXT32,       // UTF-32 Text Mode (Acess Native)
  35         NUM_VT_INMODES
  36 };
  37
  38 // === TYPES ===
  39 typedef struct {
  40          int    Mode;   //!< Current Mode (see ::eTplTerminal_Modes)
  41          int    Flags;  //!< Flags (see VT_FLAG_*)
  42         short   Width;  //!< Virtual Width
  43         short   Height; //!< Virtual Height
  44         short   RealWidth;      //!< Real Width
  45         short   RealHeight;     //!< Real Height
  46
  47          int    ViewPos;        //!< View Buffer Offset (Text Only)
  48          int    WritePos;       //!< Write Buffer Offset (Text Only)
  49         Uint32  CurColour;      //!< Current Text Colour
  50         char    Name[2];        //!< Name of the terminal
  51
  52          int    InputRead;      //!< Input buffer read position
  53          int    InputWrite;     //!< Input buffer write position
  54         char    InputBuffer[MAX_INPUT_CHARS8];
  55         union {
  56                 tVT_Char        *Text;
  57                 Uint32          *Buffer;
  58         };
  59         tVFS_Node       Node;
  60 } tVTerm;
  61
  62 // === IMPORTS ===
  63 extern void     Debug_SetKTerminal(char *File);
  64
  65 // === PROTOTYPES ===
  66  int    VT_Install(char **Arguments);
  67 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  68 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  69  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  70 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  71 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  72  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  73 void    VT_SetTerminal(int ID);
  74 void    VT_KBCallBack(Uint32 Codepoint);
  75 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  76  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  77 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  78 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  79 void    VT_int_ChangeMode(tVTerm *Term, int NewMode);
  80
  81 // === CONSTANTS ===
  82 const Uint16    caVT100Colours[] = {
  83                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  84                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  85         };
  86
  87 // === GLOBALS ===
  88 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
  89 tDevFS_Driver   gVT_DrvInfo = {
  90         NULL, "VTerm",
  91         {
  92         .Flags = VFS_FFLAG_DIRECTORY,
  93         .Size = NUM_VTS,
  94         .Inode = -1,
  95         .NumACLs = 0,
  96         .ReadDir = VT_ReadDir,
  97         .FindDir = VT_FindDir,
  98         .IOCtl = VT_Root_IOCtl
  99         }
 100 };
 101 // --- Terminals ---
 102 tVTerm  gVT_Terminals[NUM_VTS];
 103  int    giVT_CurrentTerminal = 0;
 104 // --- Driver Handles ---
 105 char    *gsVT_OutputDevice = NULL;
 106 char    *gsVT_InputDevice = NULL;
 107  int    giVT_OutputDevHandle = -2;
 108  int    giVT_InputDevHandle = -2;
 109 // --- Key States --- (Used for VT Switching/Magic Combos)
 110  int    gbVT_CtrlDown = 0;
 111  int    gbVT_AltDown = 0;
 112  int    gbVT_SysrqDown = 0;
 113
 114 // === CODE ===
 115 /**
 116  * \fn int VT_Install(char **Arguments)
 117  * \brief Installs the Virtual Terminal Driver
 118  */
 119 int VT_Install(char **Arguments)
 120 {
 121         char    **args = Arguments;
 122         char    *arg;
 123          int    i;
 124
 125         // Scan Arguments
 126         if(Arguments)
 127         {
 128                 for( ; (arg = *args); args++ )
 129                 {
 130                         if(arg[0] != '-')       continue;
 131
 132                         switch(arg[1])
 133                         {
 134                         // Set output device
 135                         case 'o':
 136                                 if(args[1] ==  NULL)    break;
 137                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 138                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 139                                 strcpy(gsVT_OutputDevice, args[1]);
 140                                 args ++;
 141                                 break;
 142
 143                         // Set input device
 144                         case 'i':
 145                                 if(args[1] == NULL)     break;
 146                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 147                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 148                                 strcpy(gsVT_InputDevice, args[1]);
 149                                 args ++;
 150                                 break;
 151
 152                         }
 153                 }
 154         }
 155
 156         // Apply Defaults
 157         if(!gsVT_OutputDevice)  gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
 158         if(!gsVT_InputDevice)   gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
 159
 160         LOG("Using '%s' as output", gsVT_OutputDevice);
 161         LOG("Using '%s' as input", gsVT_InputDevice);
 162
 163         // Create Nodes
 164         for( i = 0; i < NUM_VTS; i++ )
 165         {
 166                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 167                 gVT_Terminals[i].Flags = 0;
 168                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 169                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 170                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 171                 gVT_Terminals[i].WritePos = 0;
 172                 gVT_Terminals[i].ViewPos = 0;
 173
 174                 gVT_Terminals[i].Buffer = calloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK, sizeof(tVT_Char) );
 175
 176                 gVT_Terminals[i].Name[0] = '0'+i;
 177                 gVT_Terminals[i].Name[1] = '\0';
 178                 gVT_Terminals[i].Node.Inode = i;
 179                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 180                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 181
 182                 gVT_Terminals[i].Node.Read = VT_Read;
 183                 gVT_Terminals[i].Node.Write = VT_Write;
 184                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 185         }
 186
 187         // Add to DevFS
 188         DevFS_AddDevice( &gVT_DrvInfo );
 189
 190         // Set kernel output to VT0
 191         Debug_SetKTerminal("/Devices/VTerm/0");
 192
 193         return MODULE_ERR_OK;
 194 }
 195
 196 /**
 197  * \fn void VT_InitOutput()
 198  * \brief Initialise Video Output
 199  */
 200 void VT_InitOutput()
 201 {
 202         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 203         VT_SetTerminal( 0 );
 204 }
 205
 206 /**
 207  * \fn void VT_InitInput()
 208  * \brief Initialises the input
 209  */
 210 void VT_InitInput()
 211 {
 212         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 213         if(giVT_InputDevHandle == -1)   return ;
 214         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 215 }
 216
 217 /**
 218  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 219  * \brief Read from the VTerm Directory
 220  */
 221 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 222 {
 223         if(Pos < 0)     return NULL;
 224         if(Pos >= NUM_VTS)      return NULL;
 225         return strdup( gVT_Terminals[Pos].Name );
 226 }
 227
 228 /**
 229  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 230  * \brief Find an item in the VTerm directory
 231  */
 232 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 233 {
 234          int    num;
 235
 236         //ENTER("pNode sName", Node, Name);
 237
 238         // Open the input and output files if needed
 239         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 240         if(giVT_InputDevHandle == -2)   VT_InitInput();
 241
 242         // Sanity check name
 243         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 244                 LEAVE('n');
 245                 return NULL;
 246         }
 247         // Get index
 248         num = Name[0] - '0';
 249         if(num >= NUM_VTS) {
 250                 LEAVE('n');
 251                 return NULL;
 252         }
 253         // Return node
 254         //LEAVE('p', &gVT_Terminals[num].Node);
 255         return &gVT_Terminals[num].Node;
 256 }
 257
 258 /**
 259  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 260  * \brief Control the VTerm Driver
 261  */
 262 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 263 {
 264          int    len;
 265         switch(Id)
 266         {
 267         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 268         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 269         case DRV_IOCTL_VERSION: return VERSION;
 270         case DRV_IOCTL_LOOKUP:  return 0;
 271
 272         case 4: // Get Video Driver
 273                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 274                 return strlen(gsVT_OutputDevice);
 275
 276         case 5: // Set Video Driver
 277                 if(!Data)       return -EINVAL;
 278                 if(Threads_GetUID() != 0)       return -EACCES;
 279
 280                 len = strlen(Data);
 281
 282                 free(gsVT_OutputDevice);
 283
 284                 gsVT_OutputDevice = malloc(len+1);
 285                 strcpy(gsVT_OutputDevice, Data);
 286
 287                 VFS_Close(giVT_OutputDevHandle);
 288                 giVT_OutputDevHandle = -1;
 289
 290                 VT_InitOutput();
 291                 return 1;
 292         }
 293         return 0;
 294 }
 295
 296 /**
 297  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 298  * \brief Read from a virtual terminal
 299  */
 300 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 301 {
 302          int    pos = 0;
 303         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 304
 305         // Check current mode
 306         switch(term->Mode)
 307         {
 308         case TERM_MODE_TEXT:
 309                 while(pos < Length)
 310                 {
 311                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 312
 313                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 314                         pos ++;
 315                         term->InputRead ++;
 316                         term->InputRead %= MAX_INPUT_CHARS8;
 317                 }
 318                 break;
 319
 320         case TERM_MODE_FB:
 321         //case TERM_MODE_:
 322                 while(pos < Length)
 323                 {
 324                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 325                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 326                         pos ++;
 327                         term->InputRead ++;
 328                         term->InputRead %= MAX_INPUT_CHARS32;
 329                 }
 330                 break;
 331         }
 332         return 0;
 333 }
 334
 335 /**
 336  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 337  * \brief Write to a virtual terminal
 338  */
 339 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 340 {
 341         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 342
 343         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 344
 345         // Write
 346         switch( term->Mode )
 347         {
 348         case TERM_MODE_TEXT:
 349                 VT_int_PutString(term, Buffer, Length);
 350                 break;
 351         case TERM_MODE_FB:
 352                 if( term->RealWidth > term->Width || term->RealHeight > term->Height )
 353                 {
 354                         #if 0
 355                          int    x, y, h;
 356                         x = Offset/4;   y = x / term->Width;    x %= term->Width;
 357                         w = Length/4+x; h = w / term->Width;    w %= term->Width;
 358                         while(h--)
 359                         {
 360                                 VFS_WriteAt( giVT_OutputDevHandle,
 361                                         (x+y*term->RealWidth)*4,
 362                                         term->Width * 4,
 363                                         Buffer
 364                                         );
 365                                 Buffer = (void*)( (Uint)Buffer + term->Width*term->Height*4 );
 366                         }
 367                         #endif
 368                         return 0;
 369                 }
 370                 else {
 371                         return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 372                 }
 373         }
 374
 375         //LEAVE('i', 0);
 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 /**
 447  * \fn void VT_SetTerminal(int ID)
 448  * \brief Set the current terminal
 449  */
 450 void VT_SetTerminal(int ID)
 451 {
 452         tVideo_IOCtl_Mode       mode = {0};
 453          int    modeNum;
 454
 455         // Create the video mode
 456         mode.width = gVT_Terminals[ ID ].Width;
 457         mode.height = gVT_Terminals[ ID ].Height;
 458         // - Text Mode
 459         if(gVT_Terminals[ ID ].Mode == TERM_MODE_TEXT) {
 460                 mode.bpp = 12;
 461                 mode.flags = VIDEO_FLAG_TEXT;
 462         }
 463         // - Framebuffer or 3D
 464         else {
 465                 mode.bpp = 32;
 466                 mode.flags = 0;
 467         }
 468
 469         // Set video mode
 470         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 471         modeNum = mode.id;
 472         gVT_Terminals[ ID ].RealWidth = mode.width;
 473         gVT_Terminals[ ID ].RealHeight = mode.height;
 474         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &modeNum );
 475
 476         // Update current terminal ID
 477         Log("Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 478         giVT_CurrentTerminal = ID;
 479
 480         // Update the screen
 481         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 482 }
 483
 484 /**
 485  * \fn void VT_KBCallBack(Uint32 Codepoint)
 486  * \brief Called on keyboard interrupt
 487  * \param Codepoint     Pseudo-UTF32 character
 488  *
 489  * Handles a key press and sends the key code to the user's buffer.
 490  * If the code creates a kernel-magic sequence, it is not passed to the
 491  * user and is handled in-kernel.
 492  */
 493 void VT_KBCallBack(Uint32 Codepoint)
 494 {
 495         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 496
 497         // How the hell did we get a Codepoint of zero?
 498         if(Codepoint == 0)      return;
 499
 500         // Key Up
 501         if( Codepoint & 0x80000000 )
 502         {
 503                 Codepoint &= 0x7FFFFFFF;
 504                 switch(Codepoint)
 505                 {
 506                 #if !USE_CTRL_ALT
 507                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 508                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 509                 #else
 510                 case KEY_LALT:
 511                 case KEY_RALT:
 512                         gbVT_AltDown = 0;
 513                         break;
 514                 case KEY_LCTRL:
 515                 case KEY_RCTRL:
 516                         gbVT_CtrlDown = 0;
 517                         break;
 518                 #endif
 519                 }
 520                 return;
 521         }
 522
 523         switch(Codepoint)
 524         {
 525         #if !USE_CTRL_ALT
 526         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 527         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 528         #else
 529         case KEY_LALT:
 530         case KEY_RALT:
 531                 gbVT_AltDown = 1;
 532                 break;
 533         case KEY_LCTRL:
 534         case KEY_RCTRL:
 535                 gbVT_CtrlDown = 1;
 536                 break;
 537         #endif
 538
 539         default:
 540                 #if USE_CTRL_ALT
 541                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 542                         break;
 543                 #endif
 544                 switch(Codepoint)
 545                 {
 546                 case KEY_F1:    VT_SetTerminal(0);      return;
 547                 case KEY_F2:    VT_SetTerminal(1);      return;
 548                 case KEY_F3:    VT_SetTerminal(2);      return;
 549                 case KEY_F4:    VT_SetTerminal(3);      return;
 550                 case KEY_F5:    VT_SetTerminal(4);      return;
 551                 case KEY_F6:    VT_SetTerminal(5);      return;
 552                 case KEY_F7:    VT_SetTerminal(6);      return;
 553                 case KEY_F8:    VT_SetTerminal(7);      return;
 554                 case KEY_F9:    VT_SetTerminal(8);      return;
 555                 case KEY_F10:   VT_SetTerminal(9);      return;
 556                 case KEY_F11:   VT_SetTerminal(10);     return;
 557                 case KEY_F12:   VT_SetTerminal(11);     return;
 558                 case KEY_PGUP:
 559                         return;
 560                 case KEY_PGDOWN:
 561                         return;
 562                 }
 563         }
 564
 565         // Encode key
 566         if(term->Mode == TERM_MODE_TEXT)
 567         {
 568                 Uint8   buf[6] = {0};
 569                  int    len = 0;
 570
 571                 // Ignore Modifer Keys
 572                 if(Codepoint > KEY_MODIFIERS)   return;
 573
 574                 // Get UTF-8/ANSI Encoding
 575                 switch(Codepoint)
 576                 {
 577                 case KEY_LEFT:
 578                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 579                         len = 3;
 580                         break;
 581                 case KEY_RIGHT:
 582                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 583                         len = 3;
 584                         break;
 585                 case KEY_UP:
 586                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 587                         len = 3;
 588                         break;
 589                 case KEY_DOWN:
 590                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 591                         len = 3;
 592                         break;
 593
 594                 case KEY_PGUP:
 595                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 596                         //len = 4;      // Commented out until I'm sure
 597                         break;
 598                 case KEY_PGDOWN:
 599                         len = 0;
 600                         break;
 601
 602                 // Attempt to encode in UTF-8
 603                 default:
 604                         len = WriteUTF8( buf, Codepoint );
 605                         if(len == 0) {
 606                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 607                         }
 608                         break;
 609                 }
 610
 611                 if(len == 0) {
 612                         // Unprintable / Don't Pass
 613                         return;
 614                 }
 615
 616                 // Write
 617                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 618                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 619                 else {
 620                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 621                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 622                 }
 623                 // Roll the buffer over
 624                 term->InputWrite += len;
 625                 term->InputWrite %= MAX_INPUT_CHARS8;
 626                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 627                         term->InputRead = term->InputWrite + 1;
 628                         term->InputRead %= MAX_INPUT_CHARS8;
 629                 }
 630
 631         }
 632         else
 633         {
 634                 // Encode the raw UTF-32 Key
 635                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 636                 term->InputWrite ++;
 637                 term->InputWrite %= MAX_INPUT_CHARS32;
 638                 if(term->InputRead == term->InputWrite) {
 639                         term->InputRead ++;
 640                         term->InputRead %= MAX_INPUT_CHARS32;
 641                 }
 642         }
 643 }
 644
 645 /**
 646  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 647  * \brief Print a string to the Virtual Terminal
 648  */
 649 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 650 {
 651         Uint32  val;
 652          int    i;
 653         for( i = 0; i < Count; i++ )
 654         {
 655                 if( Buffer[i] == 0x1B ) // Escape Sequence
 656                 {
 657                         i ++;
 658                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 659                         continue;
 660                 }
 661
 662                 if( Buffer[i] < 128 )   // Plain ASCII
 663                         VT_int_PutChar(Term, Buffer[i]);
 664                 else {  // UTF-8
 665                         i += ReadUTF8(&Buffer[i], &val);
 666                         VT_int_PutChar(Term, val);
 667                 }
 668         }
 669
 670         // Update cursor
 671         if( !(Term->Flags & VT_FLAG_HIDECSR) )
 672         {
 673                 tVideo_IOCtl_Pos        pos;
 674                 pos.x = Term->WritePos % Term->Width;
 675                 pos.y = Term->WritePos / Term->Width;
 676                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 677         }
 678 }
 679
 680 /**
 681  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 682  * \brief Clears a line in a virtual terminal
 683  */
 684 void VT_int_ClearLine(tVTerm *Term, int Num)
 685 {
 686          int    i;
 687         //ENTER("pTerm iNum", Term, Num);
 688         for( i = Term->Width; i--; )
 689         {
 690                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 691                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 692         }
 693         //LEAVE('-');
 694 }
 695
 696 /**
 697  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 698  * \brief Parses a VT100 Escape code
 699  */
 700 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 701 {
 702         char    c;
 703          int    argc = 0, j = 1;
 704          int    tmp;
 705          int    args[4] = {0,0,0,0};
 706
 707         switch(Buffer[0]) {
 708         //Large Code
 709         case '[':
 710                 // Get Arguments
 711                 c = Buffer[1];
 712                 do {
 713                         while('0' <= c && c <= '9') {
 714                                 args[argc] *= 10;
 715                                 args[argc] += c-'0';
 716                                 c = Buffer[++j];
 717                         }
 718                         if( j != 1 )    argc ++;
 719                 } while(c == ';');
 720
 721                 // Get string (what does this do?)
 722                 if(c == '"') {
 723                         c = Buffer[++j];
 724                         while(c != '"')
 725                                 c = Buffer[++j];
 726                 }
 727
 728                 // Get Command
 729                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 730                 {
 731                         switch(c)
 732                         {
 733                         // Left
 734                         case 'D':
 735                                 if(argc == 1)   tmp = args[0];
 736                                 else    tmp = 1;
 737
 738                                 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
 739                                         Term->WritePos -= Term->WritePos % Term->Width;
 740                                 else
 741                                         Term->WritePos -= tmp;
 742                                 break;
 743
 744                         // Right
 745                         case 'C':
 746                                 if(argc == 1)   tmp = args[0];
 747                                 else    tmp = 1;
 748                                 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
 749                                         Term->WritePos -= Term->WritePos % Term->Width;
 750                                         Term->WritePos += Term->Width - 1;
 751                                 } else
 752                                         Term->WritePos += tmp;
 753                                 break;
 754
 755                         // Clear By Line
 756                         case 'J':
 757                                 // Clear Screen
 758                                 switch(args[0])
 759                                 {
 760                                 case 2:
 761                                         {
 762                                          int    i = Term->Height * VT_SCROLLBACK;
 763                                         while( i-- )    VT_int_ClearLine(Term, i);
 764                                         Term->WritePos = 0;
 765                                         Term->ViewPos = 0;
 766                                         VT_int_UpdateScreen(Term, 1);
 767                                         }
 768                                         break;
 769                                 }
 770                                 break;
 771                         // Set Font flags
 772                         case 'm':
 773                                 for( ; argc--; )
 774                                 {
 775                                         // Flags
 776                                         if( 0 <= args[argc] && args[argc] <= 8)
 777                                         {
 778                                                 switch(args[argc])
 779                                                 {
 780                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 781                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 782                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 783                                                 }
 784                                         }
 785                                         // Foreground Colour
 786                                         else if(30 <= args[argc] && args[argc] <= 37) {
 787                                                 Term->CurColour &= 0xF000FFFF;
 788                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 789                                         }
 790                                         // Background Colour
 791                                         else if(40 <= args[argc] && args[argc] <= 47) {
 792                                                 Term->CurColour &= 0xFFFF8000;
 793                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 794                                         }
 795                                 }
 796                                 break;
 797                         }
 798                 }
 799                 break;
 800
 801         default:
 802                 break;
 803         }
 804
 805         return j + 1;
 806 }
 807
 808 /**
 809  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 810  * \brief Write a single character to a VTerm
 811  */
 812 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 813 {
 814          int    i;
 815         //ENTER("pTerm xCh", Term, Ch);
 816         //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
 817
 818         switch(Ch)
 819         {
 820         case '\0':      return; // Ignore NULL byte
 821         case '\n':
 822                 Term->WritePos += Term->Width;
 823         case '\r':
 824                 Term->WritePos -= Term->WritePos % Term->Width;
 825                 break;
 826
 827         case '\t':
 828                 do {
 829                         Term->Text[ Term->WritePos ].Ch = '\0';
 830                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 831                         Term->WritePos ++;
 832                 } while(Term->WritePos & 7);
 833                 break;
 834
 835         case '\b':
 836                 // Backspace is invalid at Offset 0
 837                 if(Term->WritePos == 0) break;
 838
 839                 Term->WritePos --;
 840                 // Singe Character
 841                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
 842                         Term->Text[ Term->WritePos ].Ch = 0;
 843                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 844                         break;
 845                 }
 846                 // Tab
 847                 i = 7;  // Limit it to 8
 848                 do {
 849                         Term->Text[ Term->WritePos ].Ch = 0;
 850                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 851                         Term->WritePos --;
 852                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
 853                 if(Term->Text[ Term->WritePos ].Ch != '\0')
 854                         Term->WritePos ++;
 855                 break;
 856
 857         default:
 858                 Term->Text[ Term->WritePos ].Ch = Ch;
 859                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 860                 Term->WritePos ++;
 861                 break;
 862         }
 863
 864
 865         // Move Screen
 866         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 867         {
 868                  int    base, i;
 869                 Term->WritePos -= Term->Width;
 870
 871                 // Update view position
 872                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 873                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 874                 if(Term->ViewPos > base)        Term->ViewPos = base;
 875
 876                 // Scroll terminal cache
 877                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 878
 879                 // Scroll Back
 880                 memcpy(
 881                         Term->Text,
 882                         &Term->Text[Term->Width],
 883                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 884                         );
 885
 886                 // Clear last row
 887                 for( i = 0; i < Term->Width; i ++ )
 888                 {
 889                         Term->Text[ base + i ].Ch = 0;
 890                         Term->Text[ base + i ].Colour = Term->CurColour;
 891                 }
 892
 893                 VT_int_UpdateScreen( Term, 1 );
 894         }
 895         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 896         {
 897                 Term->ViewPos += Term->Width;
 898                 VT_int_UpdateScreen( Term, 1 );
 899         }
 900         else
 901                 VT_int_UpdateScreen( Term, 0 );
 902
 903         //LEAVE('-');
 904 }
 905
 906 /**
 907  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 908  * \brief Updates the video framebuffer
 909  */
 910 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 911 {
 912         // Only update if this is the current terminal
 913         if( Term != &gVT_Terminals[giVT_CurrentTerminal] )      return;
 914
 915         if( Term->Mode == TERM_MODE_TEXT )
 916         {
 917                 if(UpdateAll) {
 918                         VFS_WriteAt(
 919                                 giVT_OutputDevHandle,
 920                                 0,
 921                                 Term->Width*Term->Height*sizeof(tVT_Char),
 922                                 &Term->Text[Term->ViewPos]
 923                                 );
 924                 } else {
 925                          int    pos = Term->WritePos - Term->WritePos % Term->Width;
 926                         VFS_WriteAt(
 927                                 giVT_OutputDevHandle,
 928                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
 929                                 Term->Width*sizeof(tVT_Char),
 930                                 &Term->Text[pos]
 931                                 );
 932                 }
 933         }
 934         else
 935         {
 936                 VFS_WriteAt(
 937                         giVT_OutputDevHandle,
 938                         0,
 939                         Term->Width*Term->Height*sizeof(Uint32),
 940                         &Term->Buffer
 941                         );
 942         }
 943 }
 944
 945 /**
 946  * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 947  * \brief Change the mode of a VTerm
 948  */
 949 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
 950 {
 951         switch(NewMode)
 952         {
 953         case TERM_MODE_TEXT:
 954                 free(Term->Buffer);
 955                 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
 956                 break;
 957         case TERM_MODE_FB:
 958                 free(Term->Text);
 959                 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
 960                 break;
 961         //case TERM_MODE_OPENGL:
 962         //      return;
 963         }
 964
 965         Term->Mode = NewMode;
 966 }
 967
 968 // ---
 969 // Font Render
 970 // ---
 971 #define MONOSPACE_FONT  10816
 972
 973 #if MONOSPACE_FONT == 10808     // 8x8
 974 # include "vterm_font_8x8.h"
 975 #elif MONOSPACE_FONT == 10816   // 8x16
 976 # include "vterm_font_8x16.h"
 977 #endif
 978
 979 // === PROTOTYPES ===
 980 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
 981
 982 // === GLOBALS ===
 983 int     giVT_CharWidth = FONT_WIDTH+1;
 984 int     giVT_CharHeight = FONT_HEIGHT;
 985
 986 // === CODE ===
 987 /**
 988  * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 989  * \brief Render a font character
 990  */
 991 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
 992 {
 993         Uint8   *font;
 994         Uint32  *buf = Buffer;
 995          int    x, y;
 996
 997         font = VT_Font_GetChar(Codepoint);
 998
 999         for(y = 0; y < FONT_HEIGHT; y ++)
1000         {
1001                 for(x = 0; x < FONT_WIDTH; x ++)
1002                 {
1003                         if(*font & (1 << (FONT_WIDTH-x-1)))
1004                                 buf[x] = FGC;
1005                         else
1006                                 buf[x] = BGC;
1007                 }
1008                 buf += Pitch;
1009                 font ++;
1010         }
1011 }
1012
1013 /**
1014  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1015  * \brief Converts a
1016  */
1017 Uint32 VT_Colour12to24(Uint16 Col12)
1018 {
1019         Uint32  ret;
1020          int    tmp;
1021         tmp = Col12 & 0xF;
1022         ret  = (tmp << 0) | (tmp << 4);
1023         tmp = (Col12 & 0xF0) >> 4;
1024         ret |= (tmp << 8) | (tmp << 12);
1025         tmp = (Col12 & 0xF00) >> 8;
1026         ret |= (tmp << 16) | (tmp << 20);
1027         return ret;
1028 }
1029
1030 /**
1031  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1032  * \brief Gets an index into the font array given a Unicode Codepoint
1033  * \note See http://en.wikipedia.org/wiki/CP437
1034  */
1035 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1036 {
1037          int    index = 0;
1038         if(Codepoint < 128)
1039                 return &VTermFont[Codepoint*FONT_HEIGHT];
1040         switch(Codepoint)
1041         {
1042         case 0xC7:      index = 128;    break;  // Ç
1043         case 0xFC:      index = 129;    break;  // ü
1044         case 0xE9:      index = 130;    break;  // é
1045         case 0xE2:      index = 131;    break;  // â
1046         case 0xE4:      index = 132;    break;  // ä
1047         case 0xE0:      index = 133;    break;  // à
1048         case 0xE5:      index = 134;    break;  // å
1049         case 0xE7:      index = 135;    break;  // ç
1050         case 0xEA:      index = 136;    break;  // ê
1051         case 0xEB:      index = 137;    break;  // ë
1052         case 0xE8:      index = 138;    break;  // è
1053         case 0xEF:      index = 139;    break;  // ï
1054         case 0xEE:      index = 140;    break;  // î
1055         case 0xEC:      index = 141;    break;  // ì
1056         case 0xC4:      index = 142;    break;  // Ä
1057         case 0xC5:      index = 143;    break;  // Å
1058         }
1059
1060         return &VTermFont[index*FONT_HEIGHT];
1061 }
1062
1063 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1064 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1065 EXPORT(VT_Font_Render);
1066 EXPORT(VT_Colour12to24);