Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #define DEBUG   0
   5 #include <acess.h>
   6 #include <fs_devfs.h>
   7 #include <modules.h>
   8 #include <tpl_drv_video.h>
   9 #include <tpl_drv_keyboard.h>
  10 #include <tpl_drv_terminal.h>
  11 #include <errno.h>
  12 #include <semaphore.h>
  13
  14 #define USE_CTRL_ALT    0
  15
  16 // === CONSTANTS ===
  17 #define VERSION ((0<<8)|(50))
  18
  19 #define NUM_VTS 8
  20 #define MAX_INPUT_CHARS32       64
  21 #define MAX_INPUT_CHARS8        (MAX_INPUT_CHARS32*4)
  22 //#define DEFAULT_OUTPUT        "BochsGA"
  23 #define DEFAULT_OUTPUT  "Vesa"
  24 #define DEFAULT_INPUT   "PS2Keyboard"
  25 #define DEFAULT_WIDTH   640
  26 #define DEFAULT_HEIGHT  480
  27 #define DEFAULT_SCROLLBACK      2       // 2 Screens of text + current screen
  28 #define DEFAULT_COLOUR  (VT_COL_BLACK|(0xAAA<<16))
  29
  30 #define VT_FLAG_HIDECSR 0x01
  31 #define VT_FLAG_HASFB   0x10    //!< Set if the VTerm has requested the Framebuffer
  32
  33 enum eVT_InModes {
  34         VT_INMODE_TEXT8,        // UTF-8 Text Mode (VT100/xterm Emulation)
  35         VT_INMODE_TEXT32,       // UTF-32 Text Mode (Acess Native)
  36         NUM_VT_INMODES
  37 };
  38
  39 // === TYPES ===
  40 typedef struct {
  41          int    Mode;   //!< Current Mode (see ::eTplTerminal_Modes)
  42          int    Flags;  //!< Flags (see VT_FLAG_*)
  43
  44         short   NewWidth;       //!< Un-applied dimensions (Width)
  45         short   NewHeight;      //!< Un-applied dimensions (Height)
  46         short   Width;  //!< Virtual Width
  47         short   Height; //!< Virtual Height
  48         short   TextWidth;      //!< Text Virtual Width
  49         short   TextHeight;     //!< Text Virtual Height
  50
  51          int    ViewPos;        //!< View Buffer Offset (Text Only)
  52          int    WritePos;       //!< Write Buffer Offset (Text Only)
  53         Uint32  CurColour;      //!< Current Text Colour
  54
  55         tMutex  ReadingLock;    //!< Lock the VTerm when a process is reading from it
  56         tTID    ReadingThread;  //!< Owner of the lock
  57          int    InputRead;      //!< Input buffer read position
  58          int    InputWrite;     //!< Input buffer write position
  59         char    InputBuffer[MAX_INPUT_CHARS8];
  60         tSemaphore      InputSemaphore;
  61
  62         tVT_Char        *Text;
  63         Uint32          *Buffer;
  64
  65         char    Name[2];        //!< Name of the terminal
  66         tVFS_Node       Node;
  67 } tVTerm;
  68
  69 // === IMPORTS ===
  70 extern void     Debug_SetKTerminal(const char *File);
  71
  72 // === PROTOTYPES ===
  73  int    VT_Install(char **Arguments);
  74 void    VT_InitOutput(void);
  75 void    VT_InitInput(void);
  76 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  77 tVFS_Node       *VT_FindDir(tVFS_Node *Node, const char *Name);
  78  int    VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
  79 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  80 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  81  int    VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
  82 void    VT_SetResolution(int Width, int Height);
  83 void    VT_SetMode(int Mode);
  84 void    VT_SetTerminal(int ID);
  85 void    VT_KBCallBack(Uint32 Codepoint);
  86 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  87 void    VT_int_ClearLine(tVTerm *Term, int Num);
  88  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  89 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  90 void    VT_int_ScrollFramebuffer( tVTerm *Term );
  91 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  92 void    VT_int_ChangeMode(tVTerm *Term, int NewMode, int NewWidth, int NewHeight);
  93
  94 // === CONSTANTS ===
  95 const Uint16    caVT100Colours[] = {
  96                 // Black, Red, Green, Yellow, Blue, Purple, Cyan, Gray
  97                 // Same again, but bright
  98                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
  99                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
 100         };
 101
 102 // === GLOBALS ===
 103 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
 104 tDevFS_Driver   gVT_DrvInfo = {
 105         NULL, "VTerm",
 106         {
 107         .Flags = VFS_FFLAG_DIRECTORY,
 108         .Size = NUM_VTS,
 109         .Inode = -1,
 110         .NumACLs = 0,
 111         .ReadDir = VT_ReadDir,
 112         .FindDir = VT_FindDir,
 113         .IOCtl = VT_Root_IOCtl
 114         }
 115 };
 116 // --- Terminals ---
 117 tVTerm  gVT_Terminals[NUM_VTS];
 118  int    giVT_CurrentTerminal = 0;
 119 tVTerm  *gpVT_CurTerm = &gVT_Terminals[0];
 120 // --- Video State ---
 121 short   giVT_RealWidth  = DEFAULT_WIDTH;        //!< Screen Width
 122 short   giVT_RealHeight = DEFAULT_HEIGHT;       //!< Screen Height
 123  int    giVT_Scrollback = DEFAULT_SCROLLBACK;
 124 // --- Driver Handles ---
 125 char    *gsVT_OutputDevice = NULL;
 126 char    *gsVT_InputDevice = NULL;
 127  int    giVT_OutputDevHandle = -2;
 128  int    giVT_InputDevHandle = -2;
 129 // --- Key States --- (Used for VT Switching/Magic Combos)
 130  int    gbVT_CtrlDown = 0;
 131  int    gbVT_AltDown = 0;
 132  int    gbVT_SysrqDown = 0;
 133
 134 // === CODE ===
 135 /**
 136  * \fn int VT_Install(char **Arguments)
 137  * \brief Installs the Virtual Terminal Driver
 138  */
 139 int VT_Install(char **Arguments)
 140 {
 141          int    i;
 142
 143         // Scan Arguments
 144         if(Arguments)
 145         {
 146                 char    **args;
 147                 const char      *arg;
 148                 for(args = Arguments; (arg = *args); args++ )
 149                 {
 150                         char    data[strlen(arg)+1];
 151                         char    *opt = data;
 152                         char    *val;
 153
 154                         val = strchr(arg, '=');
 155                         strcpy(data, arg);
 156                         if( val ) {
 157                                 data[ val - arg ] = '\0';
 158                                 val ++;
 159                         }
 160                         Log_Debug("VTerm", "Argument '%s'", arg);
 161
 162                         if( strcmp(opt, "Video") == 0 ) {
 163                                 gsVT_OutputDevice = strdup(val);
 164                         }
 165                         else if( strcmp(opt, "Input") == 0 ) {
 166                                 gsVT_InputDevice = strdup(val);
 167                         }
 168                         else if( strcmp(opt, "Width") == 0 ) {
 169                                 giVT_RealWidth = atoi( val );
 170                         }
 171                         else if( strcmp(opt, "Height") == 0 ) {
 172                                 giVT_RealHeight = atoi( val );
 173                         }
 174                         else if( strcmp(opt, "Scrollback") == 0 ) {
 175                                 giVT_Scrollback = atoi( val );
 176                         }
 177                 }
 178         }
 179
 180         if(gsVT_OutputDevice)   Modules_InitialiseBuiltin( gsVT_OutputDevice );
 181         if(gsVT_InputDevice)    Modules_InitialiseBuiltin( gsVT_InputDevice );
 182
 183         // Apply Defaults
 184         if(!gsVT_OutputDevice)  gsVT_OutputDevice = strdup(DEFAULT_OUTPUT);
 185         if(!gsVT_InputDevice)   gsVT_InputDevice = strdup(DEFAULT_INPUT);
 186
 187         // Create paths
 188         {
 189                 char    *tmp;
 190                 tmp = malloc( 9 + strlen(gsVT_OutputDevice) + 1 );
 191                 strcpy(tmp, "/Devices/");
 192                 strcpy(&tmp[9], gsVT_OutputDevice);
 193                 gsVT_OutputDevice = tmp;
 194                 tmp = malloc( 9 + strlen(gsVT_InputDevice) + 1 );
 195                 strcpy(tmp, "/Devices/");
 196                 strcpy(&tmp[9], gsVT_InputDevice);
 197                 gsVT_InputDevice = tmp;
 198         }
 199
 200         Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
 201         Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
 202
 203         // Create Nodes
 204         for( i = 0; i < NUM_VTS; i++ )
 205         {
 206                 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
 207                 gVT_Terminals[i].Flags = 0;
 208                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 209                 gVT_Terminals[i].WritePos = 0;
 210                 gVT_Terminals[i].ViewPos = 0;
 211                 gVT_Terminals[i].ReadingThread = -1;
 212
 213                 // Initialise
 214                 VT_int_ChangeMode( &gVT_Terminals[i],
 215                         TERM_MODE_TEXT, giVT_RealWidth, giVT_RealHeight );
 216
 217                 gVT_Terminals[i].Name[0] = '0'+i;
 218                 gVT_Terminals[i].Name[1] = '\0';
 219                 gVT_Terminals[i].Node.Inode = i;
 220                 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
 221                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 222
 223                 gVT_Terminals[i].Node.Read = VT_Read;
 224                 gVT_Terminals[i].Node.Write = VT_Write;
 225                 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
 226                 Semaphore_Init(&gVT_Terminals[i].InputSemaphore, 0, MAX_INPUT_CHARS8, "VTerm", gVT_Terminals[i].Name);
 227         }
 228
 229         // Add to DevFS
 230         DevFS_AddDevice( &gVT_DrvInfo );
 231
 232         VT_InitOutput();
 233         VT_InitInput();
 234
 235         // Set kernel output to VT0
 236         Debug_SetKTerminal("/Devices/VTerm/0");
 237
 238         Log_Log("VTerm", "Returning %i", MODULE_ERR_OK);
 239         return MODULE_ERR_OK;
 240 }
 241
 242 /**
 243  * \fn void VT_InitOutput()
 244  * \brief Initialise Video Output
 245  */
 246 void VT_InitOutput()
 247 {
 248         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 249         if(giVT_OutputDevHandle == -1) {
 250                 Log_Warning("VTerm", "Oh F**k, I can't open the video device '%s'", gsVT_OutputDevice);
 251                 return ;
 252         }
 253         VT_SetResolution( giVT_RealWidth, giVT_RealHeight );
 254         VT_SetTerminal( 0 );
 255         VT_SetMode( VIDEO_BUFFMT_TEXT );
 256 }
 257
 258 /**
 259  * \fn void VT_InitInput()
 260  * \brief Initialises the input
 261  */
 262 void VT_InitInput()
 263 {
 264         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 265         if(giVT_InputDevHandle == -1) {
 266                 Log_Warning("VTerm", "Can't open the input device '%s'", gsVT_InputDevice);
 267                 return ;
 268         }
 269         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 270 }
 271
 272 /**
 273  * \brief Set the video resolution
 274  * \param Width New screen width
 275  * \param Height        New screen height
 276  */
 277 void VT_SetResolution(int Width, int Height)
 278 {
 279         tVideo_IOCtl_Mode       mode = {0};
 280          int    tmp;
 281          int    i;
 282
 283         // Create the video mode
 284         mode.width = Width;
 285         mode.height = Height;
 286         mode.bpp = 32;
 287         mode.flags = 0;
 288
 289         // Set video mode
 290         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
 291         tmp = mode.id;
 292         if( Width != mode.width || Height != mode.height )
 293         {
 294                 Log_Warning("VTerm",
 295                         "Selected resolution (%ix%i is not supported) by the device, using (%ix%i)",
 296                         giVT_RealWidth, giVT_RealHeight,
 297                         mode.width, mode.height
 298                         );
 299         }
 300         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
 301
 302         // Resize text terminals if needed
 303         if( giVT_RealWidth != mode.width || giVT_RealHeight != mode.height )
 304         {
 305                  int    newBufSize = (giVT_RealWidth/giVT_CharWidth)
 306                                         *(giVT_RealHeight/giVT_CharHeight)
 307                                         *(giVT_Scrollback+1);
 308                 //tVT_Char      *tmp;
 309                 // Resize the text terminals
 310                 giVT_RealWidth = mode.width;
 311                 giVT_RealHeight = mode.height;
 312                 for( i = 0; i < NUM_VTS; i ++ )
 313                 {
 314                         if( gVT_Terminals[i].Mode != TERM_MODE_TEXT )   continue;
 315
 316                         gVT_Terminals[i].Text = realloc(
 317                                 gVT_Terminals[i].Text,
 318                                 newBufSize*sizeof(tVT_Char)
 319                                 );
 320                 }
 321         }
 322 }
 323
 324 /**
 325  * \brief Set video output buffer mode
 326  */
 327 void VT_SetMode(int Mode)
 328 {
 329         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &Mode );
 330 }
 331
 332 /**
 333  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 334  * \brief Read from the VTerm Directory
 335  */
 336 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 337 {
 338         if(Pos < 0)     return NULL;
 339         if(Pos >= NUM_VTS)      return NULL;
 340         return strdup( gVT_Terminals[Pos].Name );
 341 }
 342
 343 /**
 344  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 345  * \brief Find an item in the VTerm directory
 346  * \param Node  Root node
 347  * \param Name  Name (number) of the terminal
 348  */
 349 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
 350 {
 351          int    num;
 352
 353         ENTER("pNode sName", Node, Name);
 354
 355         // Open the input and output files if needed
 356         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 357         if(giVT_InputDevHandle == -2)   VT_InitInput();
 358
 359         // Sanity check name
 360         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 361                 LEAVE('n');
 362                 return NULL;
 363         }
 364         // Get index
 365         num = Name[0] - '0';
 366         if(num >= NUM_VTS) {
 367                 LEAVE('n');
 368                 return NULL;
 369         }
 370         // Return node
 371         LEAVE('p', &gVT_Terminals[num].Node);
 372         return &gVT_Terminals[num].Node;
 373 }
 374
 375 /**
 376  * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 377  * \brief Control the VTerm Driver
 378  */
 379 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 380 {
 381          int    len;
 382         switch(Id)
 383         {
 384         case DRV_IOCTL_TYPE:    return DRV_TYPE_MISC;
 385         case DRV_IOCTL_IDENT:   memcpy(Data, "VT\0\0", 4);      return 0;
 386         case DRV_IOCTL_VERSION: return VERSION;
 387         case DRV_IOCTL_LOOKUP:  return 0;
 388
 389         case 4: // Get Video Driver
 390                 if(Data)        strcpy(Data, gsVT_OutputDevice);
 391                 return strlen(gsVT_OutputDevice);
 392
 393         case 5: // Set Video Driver
 394                 if(!Data)       return -EINVAL;
 395                 if(Threads_GetUID() != 0)       return -EACCES;
 396
 397                 len = strlen(Data);
 398
 399                 // TODO: Check if the string used is a heap string
 400
 401                 free(gsVT_OutputDevice);
 402
 403                 gsVT_OutputDevice = malloc(len+1);
 404                 strcpy(gsVT_OutputDevice, Data);
 405
 406                 VFS_Close(giVT_OutputDevHandle);
 407                 giVT_OutputDevHandle = -1;
 408
 409                 VT_InitOutput();
 410                 return 1;
 411         }
 412         return 0;
 413 }
 414
 415 /**
 416  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 417  * \brief Read from a virtual terminal
 418  */
 419 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 420 {
 421          int    pos = 0;
 422          int    avail;
 423         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 424
 425         Mutex_Acquire( &term->ReadingLock );
 426
 427         // Check current mode
 428         switch(term->Mode)
 429         {
 430         // Text Mode (UTF-8)
 431         case TERM_MODE_TEXT:
 432                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UTF-8)");
 433
 434                 avail = term->InputWrite - term->InputRead;
 435                 if(avail < 0)
 436                         avail += MAX_INPUT_CHARS8;
 437                 if(avail > Length - pos)
 438                         avail = Length - pos;
 439
 440                 while( avail -- )
 441                 {
 442                         ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 443                         pos ++;
 444                         term->InputRead ++;
 445                         term->InputRead %= MAX_INPUT_CHARS8;
 446                 }
 447                 break;
 448
 449         //case TERM_MODE_FB:
 450         // Other - UCS-4
 451         default:
 452                 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UCS-4)");
 453
 454                 avail = term->InputWrite - term->InputRead;
 455                 if(avail < 0)
 456                         avail += MAX_INPUT_CHARS32;
 457                 if(avail > Length - pos)
 458                         avail = Length/4 - pos;
 459
 460
 461                 while( avail -- )
 462                 {
 463                         ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
 464                         pos ++;
 465                         term->InputRead ++;
 466                         term->InputRead %= MAX_INPUT_CHARS32;
 467                 }
 468                 pos *= 4;
 469                 break;
 470         }
 471
 472         // Mark none avaliable if buffer empty
 473         if( term->InputRead == term->InputWrite )
 474                 VFS_MarkAvaliable(&term->Node, 0);
 475
 476         term->ReadingThread = -1;
 477
 478         Mutex_Release( &term->ReadingLock );
 479
 480         return pos;
 481 }
 482
 483 /**
 484  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 485  * \brief Write to a virtual terminal
 486  */
 487 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 488 {
 489         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 490          int    size;
 491
 492         // Write
 493         switch( term->Mode )
 494         {
 495         // Print Text
 496         case TERM_MODE_TEXT:
 497                 VT_int_PutString(term, Buffer, Length);
 498                 break;
 499         // Framebuffer :)
 500         case TERM_MODE_FB:
 501
 502                 // - Sanity Checking
 503                 size = term->Width*term->Height*4;
 504                 if( Offset > size ) {
 505                         Log_Notice("VTerm", "VT_Write: Offset (0x%llx) > FBSize (0x%x)",
 506                                 Offset, size);
 507                         return 0;
 508                 }
 509                 if( Offset + Length > size ) {
 510                         Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
 511                                 Offset+Length, size);
 512                         Length = size - Offset;
 513                 }
 514
 515                 // Copy to the local cache
 516                 memcpy( (void*)((Uint)term->Buffer + (Uint)Offset), Buffer, Length );
 517
 518                 // Update screen if needed
 519                 if( Node->Inode == giVT_CurrentTerminal )
 520                 {
 521                         // Fill entire screen?
 522                         if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
 523                         {
 524                                 // No? :( Well, just center it
 525                                  int    x, y, w, h;
 526                                 x = Offset/4;   y = x / term->Width;    x %= term->Width;
 527                                 w = Length/4+x; h = w / term->Width;    w %= term->Width;
 528                                 // Center
 529                                 x += (giVT_RealWidth - term->Width) / 2;
 530                                 y += (giVT_RealHeight - term->Height) / 2;
 531                                 while(h--)
 532                                 {
 533                                         VFS_WriteAt( giVT_OutputDevHandle,
 534                                                 (x + y * giVT_RealWidth)*4,
 535                                                 term->Width * 4,
 536                                                 Buffer
 537                                                 );
 538                                         Buffer = (void*)( (Uint)Buffer + term->Width*4 );
 539                                         y ++;
 540                                 }
 541                                 return 0;
 542                         }
 543                         else {
 544                                 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
 545                         }
 546                 }
 547         // Just pass on (for now)
 548         // TODO: Handle locally too to ensure no information is lost on
 549         //       VT Switch (and to isolate terminals from each other)
 550         case TERM_MODE_2DACCEL:
 551         //case TERM_MODE_3DACCEL:
 552                 if( Node->Inode == giVT_CurrentTerminal )
 553                 {
 554                         VFS_Write( giVT_OutputDevHandle, Length, Buffer );
 555                 }
 556                 break;
 557         }
 558
 559         return 0;
 560 }
 561
 562 /**
 563  * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 564  * \brief Call an IO Control on a virtual terminal
 565  */
 566 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
 567 {
 568          int    *iData = Data;
 569          int    ret;
 570         tVTerm  *term = Node->ImplPtr;
 571         ENTER("pNode iId pData", Node, Id, Data);
 572
 573         if(Id >= DRV_IOCTL_LOOKUP) {
 574                 // Only root can fiddle with graphics modes
 575                 // TODO: Remove this and replace with user ownership
 576                 if( Threads_GetUID() != 0 )     return -1;
 577         }
 578
 579         switch(Id)
 580         {
 581         // --- Core Defined
 582         case DRV_IOCTL_TYPE:
 583                 LEAVE('i', DRV_TYPE_TERMINAL);
 584                 return DRV_TYPE_TERMINAL;
 585         case DRV_IOCTL_IDENT:
 586                 memcpy(Data, "VT\0\0", 4);
 587                 LEAVE('i', 0);
 588                 return 0;
 589         case DRV_IOCTL_VERSION:
 590                 LEAVE('x', VERSION);
 591                 return VERSION;
 592         case DRV_IOCTL_LOOKUP:
 593                 LEAVE('i', 0);
 594                 return 0;
 595
 596         // Get/Set the mode (and apply any changes)
 597         case TERM_IOCTL_MODETYPE:
 598                 if(Data != NULL)
 599                 {
 600                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 601                                 LEAVE('i', -1);
 602                                 return -1;
 603                         }
 604                         Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
 605
 606                         // Update mode if needed
 607                         if( term->Mode != *iData
 608                          || term->NewWidth
 609                          || term->NewHeight)
 610                         {
 611                                 // Adjust for text mode
 612                                 if( *iData == TERM_MODE_TEXT ) {
 613                                         term->NewHeight *= giVT_CharHeight;
 614                                         term->NewWidth *= giVT_CharWidth;
 615                                 }
 616                                 // Fill unchanged dimensions
 617                                 if(term->NewHeight == 0)        term->NewHeight = term->Height;
 618                                 if(term->NewWidth == 0) term->NewWidth = term->Width;
 619                                 // Set new mode
 620                                 VT_int_ChangeMode(term, *iData, term->NewWidth, term->NewHeight);
 621                                 // Clear unapplied dimensions
 622                                 term->NewWidth = 0;
 623                                 term->NewHeight = 0;
 624                         }
 625
 626                         // Update the screen dimensions
 627                         if(Node->Inode == giVT_CurrentTerminal)
 628                                 VT_SetTerminal( giVT_CurrentTerminal );
 629                 }
 630                 LEAVE('i', term->Mode);
 631                 return term->Mode;
 632
 633         // Get/set the terminal width
 634         case TERM_IOCTL_WIDTH:
 635                 if(Data != NULL) {
 636                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 637                                 LEAVE('i', -1);
 638                                 return -1;
 639                         }
 640                         term->NewWidth = *iData;
 641                 }
 642                 if( term->NewWidth )
 643                         ret = term->NewWidth;
 644                 else if( term->Mode == TERM_MODE_TEXT )
 645                         ret = term->TextWidth;
 646                 else
 647                         ret = term->Width;
 648                 LEAVE('i', ret);
 649                 return ret;
 650
 651         // Get/set the terminal height
 652         case TERM_IOCTL_HEIGHT:
 653                 if(Data != NULL) {
 654                         if( CheckMem(Data, sizeof(int)) == 0 ) {
 655                                 LEAVE('i', -1);
 656                                 return -1;
 657                         }
 658                         term->NewHeight = *iData;
 659                 }
 660                 if( term->NewHeight )
 661                         ret = term->NewHeight;
 662                 else if( term->Mode == TERM_MODE_TEXT )
 663                         ret = term->TextHeight;
 664                 else
 665                         ret = term->Height;
 666                 LEAVE('i', ret);
 667                 return ret;
 668
 669         case TERM_IOCTL_FORCESHOW:
 670                 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
 671                         Threads_GetTID(), (int)Node->Inode);
 672                 VT_SetTerminal( Node->Inode );
 673                 LEAVE('i', 1);
 674                 return 1;
 675         }
 676         LEAVE('i', -1);
 677         return -1;
 678 }
 679
 680 /**
 681  * \fn void VT_SetTerminal(int ID)
 682  * \brief Set the current terminal
 683  */
 684 void VT_SetTerminal(int ID)
 685 {
 686         // Update current terminal ID
 687         Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
 688         giVT_CurrentTerminal = ID;
 689         gpVT_CurTerm = &gVT_Terminals[ID];
 690
 691         // Update cursor
 692         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT && !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
 693         {
 694                 tVideo_IOCtl_Pos        pos;
 695                 pos.x = (gpVT_CurTerm->WritePos - gpVT_CurTerm->ViewPos) % gpVT_CurTerm->TextWidth;
 696                 pos.y = (gpVT_CurTerm->WritePos - gpVT_CurTerm->ViewPos) / gpVT_CurTerm->TextWidth;
 697                 if( pos.x < gpVT_CurTerm->TextHeight )
 698                         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 699         }
 700
 701         if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
 702                 VT_SetMode( VIDEO_BUFFMT_TEXT );
 703         else
 704                 VT_SetMode( VIDEO_BUFFMT_FRAMEBUFFER );
 705
 706         // Update the screen
 707         VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
 708 }
 709
 710 /**
 711  * \fn void VT_KBCallBack(Uint32 Codepoint)
 712  * \brief Called on keyboard interrupt
 713  * \param Codepoint     Pseudo-UTF32 character
 714  *
 715  * Handles a key press and sends the key code to the user's buffer.
 716  * If the code creates a kernel-magic sequence, it is not passed to the
 717  * user and is handled in-kernel.
 718  */
 719 void VT_KBCallBack(Uint32 Codepoint)
 720 {
 721         tVTerm  *term = gpVT_CurTerm;
 722
 723         // How the hell did we get a codepoint of zero?
 724         if(Codepoint == 0)      return;
 725
 726         // Key Up
 727         if( Codepoint & 0x80000000 )
 728         {
 729                 Codepoint &= 0x7FFFFFFF;
 730                 switch(Codepoint)
 731                 {
 732                 #if !USE_CTRL_ALT
 733                 case KEY_RSHIFT:        gbVT_CtrlDown = 0;      break;
 734                 case KEY_LSHIFT:        gbVT_AltDown = 0;       break;
 735                 #else
 736                 case KEY_LALT:  gbVT_AltDown &= ~1;     break;
 737                 case KEY_RALT:  gbVT_AltDown &= ~2;     break;
 738                 case KEY_LCTRL: gbVT_CtrlDown &= ~1     break;
 739                 case KEY_RCTRL: gbVT_CtrlDown &= ~2;    break;
 740                 #endif
 741                 }
 742                 return;
 743         }
 744
 745         switch(Codepoint)
 746         {
 747         #if !USE_CTRL_ALT       // HACK: Use both shifts instead of Ctrl-Alt
 748         case KEY_RSHIFT:        gbVT_CtrlDown = 1;      break;
 749         case KEY_LSHIFT:        gbVT_AltDown = 1;       break;
 750         #else
 751         case KEY_LALT:  gbVT_AltDown |= 1;      break;
 752         case KEY_RALT:  gbVT_AltDown |= 2;      break;
 753         case KEY_LCTRL: gbVT_CtrlDown |= 1;     break;
 754         case KEY_RCTRL: gbVT_CtrlDown |= 2;     break;
 755         #endif
 756
 757         default:
 758                 if(!gbVT_AltDown || !gbVT_CtrlDown)
 759                         break;
 760                 switch(Codepoint)
 761                 {
 762                 case KEY_F1:    VT_SetTerminal(0);      return;
 763                 case KEY_F2:    VT_SetTerminal(1);      return;
 764                 case KEY_F3:    VT_SetTerminal(2);      return;
 765                 case KEY_F4:    VT_SetTerminal(3);      return;
 766                 case KEY_F5:    VT_SetTerminal(4);      return;
 767                 case KEY_F6:    VT_SetTerminal(5);      return;
 768                 case KEY_F7:    VT_SetTerminal(6);      return;
 769                 case KEY_F8:    VT_SetTerminal(7);      return;
 770                 case KEY_F9:    VT_SetTerminal(8);      return;
 771                 case KEY_F10:   VT_SetTerminal(9);      return;
 772                 case KEY_F11:   VT_SetTerminal(10);     return;
 773                 case KEY_F12:   VT_SetTerminal(11);     return;
 774                 // Scrolling
 775                 case KEY_PGUP:
 776                         if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
 777                                 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
 778                         else
 779                                 gpVT_CurTerm->ViewPos = 0;
 780                         return;
 781                 case KEY_PGDOWN:
 782                         if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*gpVT_CurTerm->Height*(giVT_Scrollback-1) )
 783                                 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
 784                         else
 785                                 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*gpVT_CurTerm->Height*(giVT_Scrollback-1);
 786                         return;
 787                 }
 788         }
 789
 790         // Encode key
 791         if(term->Mode == TERM_MODE_TEXT)
 792         {
 793                 Uint8   buf[6] = {0};
 794                  int    len = 0;
 795
 796                 // Ignore Modifer Keys
 797                 if(Codepoint > KEY_MODIFIERS)   return;
 798
 799                 // Get UTF-8/ANSI Encoding
 800                 switch(Codepoint)
 801                 {
 802                 case KEY_LEFT:
 803                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'D';
 804                         len = 3;
 805                         break;
 806                 case KEY_RIGHT:
 807                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'C';
 808                         len = 3;
 809                         break;
 810                 case KEY_UP:
 811                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'A';
 812                         len = 3;
 813                         break;
 814                 case KEY_DOWN:
 815                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = 'B';
 816                         len = 3;
 817                         break;
 818
 819                 case KEY_PGUP:
 820                         buf[0] = '\x1B';        buf[1] = '[';   buf[2] = '5';   // Some overline also
 821                         //len = 4;      // Commented out until I'm sure
 822                         break;
 823                 case KEY_PGDOWN:
 824                         len = 0;
 825                         break;
 826
 827                 // Attempt to encode in UTF-8
 828                 default:
 829                         len = WriteUTF8( buf, Codepoint );
 830                         if(len == 0) {
 831                                 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
 832                         }
 833                         break;
 834                 }
 835
 836                 if(len == 0) {
 837                         // Unprintable / Don't Pass
 838                         return;
 839                 }
 840
 841                 // Write
 842                 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
 843                         memcpy( &term->InputBuffer[term->InputWrite], buf, len );
 844                 else {
 845                         memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
 846                         memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
 847                 }
 848                 // Roll the buffer over
 849                 term->InputWrite += len;
 850                 term->InputWrite %= MAX_INPUT_CHARS8;
 851                 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
 852                         term->InputRead = term->InputWrite + 1;
 853                         term->InputRead %= MAX_INPUT_CHARS8;
 854                 }
 855         }
 856         else
 857         {
 858                 // Encode the raw UTF-32 Key
 859                 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
 860                 term->InputWrite ++;
 861                 term->InputWrite %= MAX_INPUT_CHARS32;
 862                 if(term->InputRead == term->InputWrite) {
 863                         term->InputRead ++;
 864                         term->InputRead %= MAX_INPUT_CHARS32;
 865                 }
 866         }
 867
 868         VFS_MarkAvaliable(&term->Node, 1);
 869
 870         // Wake up the thread waiting on us
 871         //if( term->ReadingThread >= 0 ) {
 872         //      Threads_WakeTID(term->ReadingThread);
 873         //}
 874 }
 875
 876 /**
 877  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 878  * \brief Clears a line in a virtual terminal
 879  */
 880 void VT_int_ClearLine(tVTerm *Term, int Num)
 881 {
 882          int    i;
 883         tVT_Char        *cell = &Term->Text[ Num*Term->TextWidth ];
 884         if( Num < 0 || Num >= Term->TextHeight * (giVT_Scrollback + 1) )        return ;
 885         //ENTER("pTerm iNum", Term, Num);
 886         for( i = Term->TextWidth; i--; )
 887         {
 888                 cell[ i ].Ch = 0;
 889                 cell[ i ].Colour = Term->CurColour;
 890         }
 891         //LEAVE('-');
 892 }
 893
 894 /**
 895  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 896  * \brief Parses a VT100 Escape code
 897  */
 898 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 899 {
 900         char    c;
 901          int    argc = 0, j = 1;
 902          int    tmp;
 903          int    args[6] = {0,0,0,0};
 904
 905         switch(Buffer[0])
 906         {
 907         //Large Code
 908         case '[':
 909                 // Get Arguments
 910                 c = Buffer[j++];
 911                 if( '0' <= c && c <= '9' )
 912                 {
 913                         do {
 914                                 if(c == ';')    c = Buffer[j++];
 915                                 while('0' <= c && c <= '9') {
 916                                         args[argc] *= 10;
 917                                         args[argc] += c-'0';
 918                                         c = Buffer[j++];
 919                                 }
 920                                 argc ++;
 921                         } while(c == ';');
 922                 }
 923
 924                 // Get Command
 925                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 926                 {
 927                         switch(c)
 928                         {
 929                         // Left
 930                         case 'D':
 931                                 if(argc == 1)   tmp = args[0];
 932                                 else    tmp = 1;
 933
 934                                 if( Term->WritePos-(tmp-1) % Term->TextWidth == 0 )
 935                                         Term->WritePos -= Term->WritePos % Term->TextWidth;
 936                                 else
 937                                         Term->WritePos -= tmp;
 938                                 break;
 939
 940                         // Right
 941                         case 'C':
 942                                 if(argc == 1)   tmp = args[0];
 943                                 else    tmp = 1;
 944                                 if( (Term->WritePos + tmp) % Term->TextWidth == 0 ) {
 945                                         Term->WritePos -= Term->WritePos % Term->TextWidth;
 946                                         Term->WritePos += Term->TextWidth - 1;
 947                                 } else
 948                                         Term->WritePos += tmp;
 949                                 break;
 950
 951                         // Clear By Line
 952                         case 'J':
 953                                 // Clear Screen
 954                                 switch(args[0])
 955                                 {
 956                                 case 2:
 957                                         {
 958                                          int    i = Term->TextHeight * (giVT_Scrollback + 1);
 959                                         while( i-- )    VT_int_ClearLine(Term, i);
 960                                         Term->WritePos = 0;
 961                                         Term->ViewPos = 0;
 962                                         VT_int_UpdateScreen(Term, 1);
 963                                         }
 964                                         break;
 965                                 }
 966                                 break;
 967                         // Set cursor position
 968                         case 'h':
 969                                 Term->WritePos = args[0] + args[1]*Term->TextWidth;
 970                                 Log_Debug("VTerm", "args = {%i, %i}", args[0], args[1]);
 971                                 break;
 972                         // Set Font flags
 973                         case 'm':
 974                                 for( ; argc--; )
 975                                 {
 976                                         // Flags
 977                                         if( 0 <= args[argc] && args[argc] <= 8)
 978                                         {
 979                                                 switch(args[argc])
 980                                                 {
 981                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 982                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 983                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 984                                                 }
 985                                         }
 986                                         // Foreground Colour
 987                                         else if(30 <= args[argc] && args[argc] <= 37) {
 988                                                 Term->CurColour &= 0xF000FFFF;
 989                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 990                                         }
 991                                         // Background Colour
 992                                         else if(40 <= args[argc] && args[argc] <= 47) {
 993                                                 Term->CurColour &= 0xFFFF8000;
 994                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 995                                         }
 996                                 }
 997                                 break;
 998                         default:
 999                                 Log_Warning("VTerm", "Unknown control sequence");
1000                                 break;
1001                         }
1002                 }
1003                 break;
1004
1005         default:        break;
1006         }
1007
1008         //Log_Debug("VTerm", "j = %i, Buffer = '%s'", j, Buffer);
1009         return j;
1010 }
1011
1012 /**
1013  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
1014  * \brief Print a string to the Virtual Terminal
1015  */
1016 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
1017 {
1018         Uint32  val;
1019          int    i;
1020
1021         // Iterate
1022         for( i = 0; i < Count; i++ )
1023         {
1024                 // Handle escape sequences
1025                 if( Buffer[i] == 0x1B )
1026                 {
1027                         i ++;
1028                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]) - 1;
1029                         continue;
1030                 }
1031
1032                 // Fast check for non UTF-8
1033                 if( Buffer[i] < 128 )   // Plain ASCII
1034                         VT_int_PutChar(Term, Buffer[i]);
1035                 else {  // UTF-8
1036                         i += ReadUTF8(&Buffer[i], &val) - 1;
1037                         VT_int_PutChar(Term, val);
1038                 }
1039         }
1040         // Update Screen
1041         VT_int_UpdateScreen( Term, 0 );
1042
1043         // Update cursor
1044         if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
1045         {
1046                 tVideo_IOCtl_Pos        pos;
1047                 pos.x = (Term->WritePos - Term->ViewPos) % Term->TextWidth;
1048                 pos.y = (Term->WritePos - Term->ViewPos) / Term->TextWidth;
1049                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
1050         }
1051 }
1052
1053 /**
1054  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
1055  * \brief Write a single character to a VTerm
1056  */
1057 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
1058 {
1059          int    i;
1060
1061         switch(Ch)
1062         {
1063         case '\0':      return; // Ignore NULL byte
1064         case '\n':
1065                 VT_int_UpdateScreen( Term, 0 ); // Update the line before newlining
1066                 Term->WritePos += Term->TextWidth;
1067         case '\r':
1068                 Term->WritePos -= Term->WritePos % Term->TextWidth;
1069                 break;
1070
1071         case '\t':
1072                 do {
1073                         Term->Text[ Term->WritePos ].Ch = '\0';
1074                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1075                         Term->WritePos ++;
1076                 } while(Term->WritePos & 7);
1077                 break;
1078
1079         case '\b':
1080                 // Backspace is invalid at Offset 0
1081                 if(Term->WritePos == 0) break;
1082
1083                 Term->WritePos --;
1084                 // Singe Character
1085                 if(Term->Text[ Term->WritePos ].Ch != '\0') {
1086                         Term->Text[ Term->WritePos ].Ch = 0;
1087                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1088                         break;
1089                 }
1090                 // Tab
1091                 i = 7;  // Limit it to 8
1092                 do {
1093                         Term->Text[ Term->WritePos ].Ch = 0;
1094                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1095                         Term->WritePos --;
1096                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
1097                 if(Term->Text[ Term->WritePos ].Ch != '\0')
1098                         Term->WritePos ++;
1099                 break;
1100
1101         default:
1102                 Term->Text[ Term->WritePos ].Ch = Ch;
1103                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
1104                 Term->WritePos ++;
1105                 break;
1106         }
1107
1108         // Move Screen
1109         // - Check if we need to scroll the entire scrollback buffer
1110         if(Term->WritePos >= Term->TextWidth*Term->TextHeight*(giVT_Scrollback+1))
1111         {
1112                  int    base;
1113
1114                 // Move back by one
1115                 Term->WritePos -= Term->TextWidth;
1116                 // Update the scren
1117                 VT_int_UpdateScreen( Term, 0 );
1118
1119                 // Update view position
1120                 base = Term->TextWidth*Term->TextHeight*(giVT_Scrollback);
1121                 if(Term->ViewPos < base)
1122                         Term->ViewPos += Term->Width;
1123                 if(Term->ViewPos > base)
1124                         Term->ViewPos = base;
1125
1126                 // Scroll terminal cache
1127                 base = Term->TextWidth*(Term->TextHeight*(giVT_Scrollback+1)-1);
1128                 memcpy(
1129                         Term->Text,
1130                         &Term->Text[Term->TextWidth],
1131                         base*sizeof(tVT_Char)
1132                         );
1133
1134                 // Clear last row
1135                 for( i = 0; i < Term->TextWidth; i ++ )
1136                 {
1137                         Term->Text[ base + i ].Ch = 0;
1138                         Term->Text[ base + i ].Colour = Term->CurColour;
1139                 }
1140
1141                 VT_int_ScrollFramebuffer( Term );
1142                 VT_int_UpdateScreen( Term, 0 );
1143         }
1144         // Ok, so we only need to scroll the screen
1145         else if(Term->WritePos >= Term->ViewPos + Term->TextWidth*Term->TextHeight)
1146         {
1147                 //Debug("Term->WritePos (%i) >= %i",
1148                 //      Term->WritePos,
1149                 //      Term->ViewPos + Term->Width*Term->Height
1150                 //      );
1151                 //Debug("Scrolling screen only");
1152
1153                 // Update the last line
1154                 Term->WritePos -= Term->TextWidth;
1155                 VT_int_UpdateScreen( Term, 0 );
1156                 Term->WritePos += Term->TextWidth;
1157                 VT_int_ClearLine(Term, Term->WritePos / Term->TextWidth);
1158
1159                 // Scroll
1160                 Term->ViewPos += Term->TextWidth;
1161                 //Debug("Term->ViewPos = %i", Term->ViewPos);
1162                 VT_int_ScrollFramebuffer( Term );
1163                 VT_int_UpdateScreen( Term, 0 );
1164         }
1165
1166         //LEAVE('-');
1167 }
1168
1169 /**
1170  * \fn void VT_int_ScrollFramebuffer( tVTerm *Term )
1171  * \note Scrolls the framebuffer by 1 text line
1172  */
1173 void VT_int_ScrollFramebuffer( tVTerm *Term )
1174 {
1175          int    tmp;
1176         struct {
1177                 Uint8   Op;
1178                 Uint16  DstX, DstY;
1179                 Uint16  SrcX, SrcY;
1180                 Uint16  W, H;
1181         } PACKED        buf;
1182
1183         // Only update if this is the current terminal
1184         if( Term != gpVT_CurTerm )      return;
1185
1186         // Switch to 2D Command Stream
1187         tmp = VIDEO_BUFFMT_2DSTREAM;
1188         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
1189
1190         // BLIT from 0,0 to 0,giVT_CharHeight
1191         buf.Op = VIDEO_2DOP_BLIT;
1192         buf.DstX = 0;   buf.DstY = 0;
1193         buf.SrcX = 0;   buf.SrcY = giVT_CharHeight;
1194         buf.W = Term->TextWidth * giVT_CharWidth;
1195         buf.H = (Term->TextHeight-1) * giVT_CharHeight;
1196         VFS_WriteAt(giVT_OutputDevHandle, 0, sizeof(buf), &buf);
1197
1198         // Restore old mode (this function is only called during text mode)
1199         tmp = VIDEO_BUFFMT_TEXT;
1200         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
1201 }
1202
1203 /**
1204  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
1205  * \brief Updates the video framebuffer
1206  */
1207 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
1208 {
1209         // Only update if this is the current terminal
1210         if( Term != gpVT_CurTerm )      return;
1211
1212         switch( Term->Mode )
1213         {
1214         case TERM_MODE_TEXT:
1215                 // Re copy the entire screen?
1216                 if(UpdateAll) {
1217                         VFS_WriteAt(
1218                                 giVT_OutputDevHandle,
1219                                 0,
1220                                 Term->TextWidth*Term->TextHeight*sizeof(tVT_Char),
1221                                 &Term->Text[Term->ViewPos]
1222                                 );
1223                 }
1224                 // Only copy the current line
1225                 else {
1226                          int    pos = Term->WritePos - Term->WritePos % Term->TextWidth;
1227                         VFS_WriteAt(
1228                                 giVT_OutputDevHandle,
1229                                 (pos - Term->ViewPos)*sizeof(tVT_Char),
1230                                 Term->TextWidth*sizeof(tVT_Char),
1231                                 &Term->Text[pos]
1232                                 );
1233                 }
1234                 break;
1235         case TERM_MODE_FB:
1236                 VFS_WriteAt(
1237                         giVT_OutputDevHandle,
1238                         0,
1239                         Term->Width*Term->Height*sizeof(Uint32),
1240                         Term->Buffer
1241                         );
1242                 break;
1243         }
1244 }
1245
1246 /**
1247  * \brief Update the screen mode
1248  * \param Term  Terminal to update
1249  * \param NewMode       New mode to set
1250  * \param NewWidth      New framebuffer width
1251  * \param NewHeight     New framebuffer height
1252  */
1253 void VT_int_ChangeMode(tVTerm *Term, int NewMode, int NewWidth, int NewHeight)
1254 {
1255          int    oldW = Term->Width;
1256          int    oldTW = oldW / giVT_CharWidth;
1257          int    oldH = Term->Height;
1258          int    oldTH = oldH / giVT_CharWidth;
1259         tVT_Char        *oldTBuf = Term->Text;
1260         Uint32  *oldFB = Term->Buffer;
1261          int    w, h, i;
1262
1263         // TODO: Increase RealWidth/RealHeight when this happens
1264         if(NewWidth > giVT_RealWidth)   NewWidth = giVT_RealWidth;
1265         if(NewHeight > giVT_RealHeight) NewHeight = giVT_RealHeight;
1266
1267         // Calculate new dimensions
1268         Term->TextWidth = NewWidth / giVT_CharWidth;
1269         Term->TextHeight = NewHeight / giVT_CharHeight;
1270         Term->Width = NewWidth;
1271         Term->Height = NewHeight;
1272         Term->Mode = NewMode;
1273
1274         // Allocate new buffers
1275         // - Text
1276         Term->Text = calloc(
1277                 Term->TextWidth * Term->TextHeight * (giVT_Scrollback+1),
1278                 sizeof(tVT_Char)
1279                 );
1280         if(oldTBuf) {
1281                 // Copy old buffer
1282                 w = oldTW;
1283                 if( w > Term->TextWidth )       w = Term->TextWidth;
1284                 h = oldTH;
1285                 if( h > Term->TextHeight )      h = Term->TextHeight;
1286                 h *= giVT_Scrollback + 1;
1287                 for( i = 0; i < h; i ++ )
1288                 {
1289                         memcpy(
1290                                 &Term->Text[i*Term->TextWidth],
1291                                 &oldTBuf[i*oldTW],
1292                                 w*sizeof(tVT_Char)
1293                                 );
1294
1295                 }
1296         }
1297
1298         // - Framebuffer
1299         Term->Buffer = calloc( Term->Width * Term->Height, sizeof(Uint32) );
1300         if(oldFB) {
1301                 // Copy old buffer
1302                 w = oldW;
1303                 if( w > Term->Width )   w = Term->Width;
1304                 h = oldH;
1305                 if( h > Term->Height )  h = Term->Height;
1306                 for( i = 0; i < h; i ++ )
1307                 {
1308                         memcpy(
1309                                 &Term->Buffer[i*Term->Width],
1310                                 &oldFB[i*oldW],
1311                                 w*sizeof(Uint32)
1312                                 );
1313                 }
1314         }
1315
1316
1317         // Debug
1318         switch(NewMode)
1319         {
1320         case TERM_MODE_TEXT:
1321                 Log_Log("VTerm", "Set VT %p to text mode (%ix%i)",
1322                         Term, Term->TextWidth, Term->TextHeight);
1323                 break;
1324         case TERM_MODE_FB:
1325                 Log_Log("VTerm", "Set VT %p to framebuffer mode (%ix%i)",
1326                         Term, Term->Width, Term->Height);
1327                 break;
1328         //case TERM_MODE_2DACCEL:
1329         //case TERM_MODE_3DACCEL:
1330         //      return;
1331         }
1332 }
1333
1334 // ---
1335 // Font Render
1336 // ---
1337 #define MONOSPACE_FONT  10816
1338
1339 #if MONOSPACE_FONT == 10808     // 8x8
1340 # include "vterm_font_8x8.h"
1341 #elif MONOSPACE_FONT == 10816   // 8x16
1342 # include "vterm_font_8x16.h"
1343 #endif
1344
1345 // === PROTOTYPES ===
1346 Uint8   *VT_Font_GetChar(Uint32 Codepoint);
1347
1348 // === GLOBALS ===
1349 int     giVT_CharWidth = FONT_WIDTH;
1350 int     giVT_CharHeight = FONT_HEIGHT;
1351
1352 // === CODE ===
1353 /**
1354  * \brief Render a font character
1355  */
1356 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Depth, int Pitch, Uint32 BGC, Uint32 FGC)
1357 {
1358         Uint8   *font;
1359          int    x, y;
1360
1361         // 8-bpp and below
1362         if( Depth <= 8 )
1363         {
1364                 Uint8   *buf = Buffer;
1365
1366                 font = VT_Font_GetChar(Codepoint);
1367
1368                 for(y = 0; y < FONT_HEIGHT; y ++)
1369                 {
1370                         for(x = 0; x < FONT_WIDTH; x ++)
1371                         {
1372                                 if(*font & (1 << (FONT_WIDTH-x-1)))
1373                                         buf[x] = FGC;
1374                                 else
1375                                         buf[x] = BGC;
1376                         }
1377                         buf = (void*)( (tVAddr)buf + Pitch );
1378                         font ++;
1379                 }
1380         }
1381         // 16-bpp and below
1382         else if( Depth <= 16 )
1383         {
1384                 Uint16  *buf = Buffer;
1385
1386                 font = VT_Font_GetChar(Codepoint);
1387
1388                 for(y = 0; y < FONT_HEIGHT; y ++)
1389                 {
1390                         for(x = 0; x < FONT_WIDTH; x ++)
1391                         {
1392                                 if(*font & (1 << (FONT_WIDTH-x-1)))
1393                                         buf[x] = FGC;
1394                                 else
1395                                         buf[x] = BGC;
1396                         }
1397                         buf = (void*)( (tVAddr)buf + Pitch );
1398                         font ++;
1399                 }
1400         }
1401         // 24-bpp colour
1402         // - Special handling to not overwrite the next pixel
1403         //TODO: Endian issues here
1404         else if( Depth == 24 )
1405         {
1406                 Uint8   *buf = Buffer;
1407                 Uint8   bg_r = (BGC >> 16) & 0xFF;
1408                 Uint8   bg_g = (BGC >>  8) & 0xFF;
1409                 Uint8   bg_b = (BGC >>  0) & 0xFF;
1410                 Uint8   fg_r = (FGC >> 16) & 0xFF;
1411                 Uint8   fg_g = (FGC >>  8) & 0xFF;
1412                 Uint8   fg_b = (FGC >>  0) & 0xFF;
1413
1414                 font = VT_Font_GetChar(Codepoint);
1415
1416                 for(y = 0; y < FONT_HEIGHT; y ++)
1417                 {
1418                         for(x = 0; x < FONT_WIDTH; x ++)
1419                         {
1420                                 Uint8   r, g, b;
1421
1422                                 if(*font & (1 << (FONT_WIDTH-x-1))) {
1423                                         r = fg_r;       g = fg_g;       b = fg_b;
1424                                 }
1425                                 else {
1426                                         r = bg_r;       g = bg_g;       b = bg_b;
1427                                 }
1428                                 buf[x*3+0] = b;
1429                                 buf[x*3+1] = g;
1430                                 buf[x*3+2] = r;
1431                         }
1432                         buf = (void*)( (tVAddr)buf + Pitch );
1433                         font ++;
1434                 }
1435         }
1436         // 32-bpp colour (nice and easy)
1437         else if( Depth == 32 )
1438         {
1439                 Uint32  *buf = Buffer;
1440
1441                 font = VT_Font_GetChar(Codepoint);
1442
1443                 for(y = 0; y < FONT_HEIGHT; y ++)
1444                 {
1445                         for(x = 0; x < FONT_WIDTH; x ++)
1446                         {
1447                                 if(*font & (1 << (FONT_WIDTH-x-1)))
1448                                         buf[x] = FGC;
1449                                 else
1450                                         buf[x] = BGC;
1451                         }
1452                         buf = (Uint32*)( (tVAddr)buf + Pitch );
1453                         font ++;
1454                 }
1455         }
1456 }
1457
1458 /**
1459  * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1460  * \brief Converts a 12-bit colour into 24 bits
1461  */
1462 Uint32 VT_Colour12to24(Uint16 Col12)
1463 {
1464         Uint32  ret;
1465          int    tmp;
1466         tmp = Col12 & 0xF;
1467         ret  = (tmp << 0) | (tmp << 4);
1468         tmp = (Col12 & 0xF0) >> 4;
1469         ret |= (tmp << 8) | (tmp << 12);
1470         tmp = (Col12 & 0xF00) >> 8;
1471         ret |= (tmp << 16) | (tmp << 20);
1472         return ret;
1473 }
1474 /**
1475  * \brief Converts a 12-bit colour into 15 bits
1476  */
1477 Uint16 VT_Colour12to15(Uint16 Col12)
1478 {
1479         Uint32  ret;
1480          int    tmp;
1481         tmp = Col12 & 0xF;
1482         ret  = (tmp << 1) | (tmp & 1);
1483         tmp = (Col12 & 0xF0) >> 4;
1484         ret |= ( (tmp << 1) | (tmp & 1) ) << 5;
1485         tmp = (Col12 & 0xF00) >> 8;
1486         ret |= ( (tmp << 1) | (tmp & 1) ) << 10;
1487         return ret;
1488 }
1489
1490 /**
1491  * \brief Converts a 12-bit colour into any other depth
1492  * \param Col12 12-bit source colour
1493  * \param Depth Desired bit deptj
1494  * \note Green then blue get the extra avaliable bits (16:5-6-5, 14:4-5-5)
1495  */
1496 Uint32 VT_Colour12toN(Uint16 Col12, int Depth)
1497 {
1498         Uint32  ret;
1499         Uint32  r, g, b;
1500          int    rSize, gSize, bSize;
1501
1502         // Fast returns
1503         if( Depth == 24 )       return VT_Colour12to24(Col12);
1504         if( Depth == 15 )       return VT_Colour12to15(Col12);
1505         // - 32 is a special case, it's usually 24-bit colour with an unused byte
1506         if( Depth == 32 )       return VT_Colour12to24(Col12);
1507
1508         // Bounds checks
1509         if( Depth < 8 ) return 0;
1510         if( Depth > 32 )        return 0;
1511
1512         r = Col12 & 0xF;
1513         g = (Col12 & 0xF0) >> 4;
1514         b = (Col12 & 0xF00) >> 8;
1515
1516         rSize = gSize = bSize = Depth / 3;
1517         if( rSize + gSize + bSize < Depth )     // Depth % 3 == 1
1518                 gSize ++;
1519         if( rSize + gSize + bSize < Depth )     // Depth % 3 == 2
1520                 bSize ++;
1521
1522         // Expand
1523         r <<= rSize - 4;        g <<= gSize - 4;        b <<= bSize - 4;
1524         // Fill with the lowest bit
1525         if( Col12 & 0x001 )     r |= (1 << (rSize - 4)) - 1;
1526         if( Col12 & 0x010 )     r |= (1 << (gSize - 4)) - 1;
1527         if( Col12 & 0x100 )     r |= (1 << (bSize - 4)) - 1;
1528
1529         // Create output
1530         ret  = r;
1531         ret |= g << rSize;
1532         ret |= b << (rSize + gSize);
1533
1534         return ret;
1535 }
1536
1537 /**
1538  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1539  * \brief Gets an index into the font array given a Unicode Codepoint
1540  * \note See http://en.wikipedia.org/wiki/CP437
1541  */
1542 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1543 {
1544          int    index = 0;
1545         if(Codepoint < 128)
1546                 return &VTermFont[Codepoint*FONT_HEIGHT];
1547         switch(Codepoint)
1548         {
1549         case 0xC7:      index = 128;    break;  // Ç
1550         case 0xFC:      index = 129;    break;  // ü
1551         case 0xE9:      index = 130;    break;  // é
1552         case 0xE2:      index = 131;    break;  // â
1553         case 0xE4:      index = 132;    break;  // ä
1554         case 0xE0:      index = 133;    break;  // à
1555         case 0xE5:      index = 134;    break;  // å
1556         case 0xE7:      index = 135;    break;  // ç
1557         case 0xEA:      index = 136;    break;  // ê
1558         case 0xEB:      index = 137;    break;  // ë
1559         case 0xE8:      index = 138;    break;  // è
1560         case 0xEF:      index = 139;    break;  // ï
1561         case 0xEE:      index = 140;    break;  // î
1562         case 0xEC:      index = 141;    break;  // ì
1563         case 0xC4:      index = 142;    break;  // Ä
1564         case 0xC5:      index = 143;    break;  // Å
1565         }
1566
1567         return &VTermFont[index*FONT_HEIGHT];
1568 }
1569
1570 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1571 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1572 EXPORT(VT_Font_Render);
1573 EXPORT(VT_Colour12to24);