Kernel/drv/vterm.c

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