2 * Acess2 Virtual Terminal Driver
8 #include <tpl_drv_video.h>
9 #include <tpl_drv_keyboard.h>
10 #include <tpl_drv_terminal.h>
13 #define USE_CTRL_ALT 0
16 #define VERSION ((0<<8)|(50))
19 #define MAX_INPUT_CHARS32 64
20 #define MAX_INPUT_CHARS8 (MAX_INPUT_CHARS32*4)
21 #define VT_SCROLLBACK 2 // 2 Screens of text
22 #define DEFAULT_OUTPUT "VGA"
23 //#define DEFAULT_OUTPUT "BochsGA"
24 //#define DEFAULT_OUTPUT "Vesa"
25 #define DEFAULT_INPUT "PS2Keyboard"
26 #define DEFAULT_WIDTH 80
27 #define DEFAULT_HEIGHT 25
28 #define DEFAULT_COLOUR (VT_COL_BLACK|(0xAAA<<16))
30 #define VT_FLAG_HIDECSR 0x01
31 #define VT_FLAG_HASFB 0x10 //!< Set if the VTerm has requested the Framebuffer
34 VT_INMODE_TEXT8, // UTF-8 Text Mode (VT100 Emulation)
35 VT_INMODE_TEXT32, // UTF-32 Text Mode (Acess Native)
41 int Mode; //!< Current Mode (see ::eTplTerminal_Modes)
42 int Flags; //!< Flags (see VT_FLAG_*)
43 short Width; //!< Virtual Width
44 short Height; //!< Virtual Height
46 int ViewPos; //!< View Buffer Offset (Text Only)
47 int WritePos; //!< Write Buffer Offset (Text Only)
48 Uint32 CurColour; //!< Current Text Colour
50 int InputRead; //!< Input buffer read position
51 int InputWrite; //!< Input buffer write position
52 char InputBuffer[MAX_INPUT_CHARS8];
57 char Name[2]; //!< Name of the terminal
62 extern void Debug_SetKTerminal(char *File);
65 int VT_Install(char **Arguments);
66 char *VT_ReadDir(tVFS_Node *Node, int Pos);
67 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name);
68 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
69 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
70 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
71 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
72 void VT_SetTerminal(int ID);
73 void VT_KBCallBack(Uint32 Codepoint);
74 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
75 int VT_int_ParseEscape(tVTerm *Term, char *Buffer);
76 void VT_int_PutChar(tVTerm *Term, Uint32 Ch);
77 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
78 void VT_int_ChangeMode(tVTerm *Term, int NewMode);
81 const Uint16 caVT100Colours[] = {
82 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
83 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
87 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_OUTPUT, DEFAULT_INPUT, NULL);
88 tDevFS_Driver gVT_DrvInfo = {
91 .Flags = VFS_FFLAG_DIRECTORY,
95 .ReadDir = VT_ReadDir,
96 .FindDir = VT_FindDir,
97 .IOCtl = VT_Root_IOCtl
101 tVTerm gVT_Terminals[NUM_VTS];
102 int giVT_CurrentTerminal = 0;
103 tVTerm *gpVT_CurTerm = &gVT_Terminals[0];
104 // --- Video State ---
105 short giVT_RealWidth; //!< Real Width
106 short giVT_RealHeight; //!< Real Height
107 int gbVT_TextMode = 1;
108 // --- Driver Handles ---
109 char *gsVT_OutputDevice = NULL;
110 char *gsVT_InputDevice = NULL;
111 int giVT_OutputDevHandle = -2;
112 int giVT_InputDevHandle = -2;
113 // --- Key States --- (Used for VT Switching/Magic Combos)
114 int gbVT_CtrlDown = 0;
115 int gbVT_AltDown = 0;
116 int gbVT_SysrqDown = 0;
120 * \fn int VT_Install(char **Arguments)
121 * \brief Installs the Virtual Terminal Driver
123 int VT_Install(char **Arguments)
125 char **args = Arguments;
132 for( ; (arg = *args); args++ )
134 if(arg[0] != '-') continue;
140 if(args[1] == NULL) break;
141 if(gsVT_OutputDevice) free(gsVT_OutputDevice);
142 gsVT_OutputDevice = malloc(strlen(args[1])+1);
143 strcpy(gsVT_OutputDevice, args[1]);
149 if(args[1] == NULL) break;
150 if(gsVT_InputDevice) free(gsVT_InputDevice);
151 gsVT_InputDevice = malloc(strlen(args[1])+1);
152 strcpy(gsVT_InputDevice, args[1]);
161 if(!gsVT_OutputDevice) gsVT_OutputDevice = "/Devices/"DEFAULT_OUTPUT;
162 if(!gsVT_InputDevice) gsVT_InputDevice = "/Devices/"DEFAULT_INPUT;
164 Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
165 Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
168 for( i = 0; i < NUM_VTS; i++ )
170 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
171 gVT_Terminals[i].Flags = 0;
172 gVT_Terminals[i].Width = DEFAULT_WIDTH;
173 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
174 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
175 gVT_Terminals[i].WritePos = 0;
176 gVT_Terminals[i].ViewPos = 0;
178 gVT_Terminals[i].Buffer = calloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK, sizeof(tVT_Char) );
180 gVT_Terminals[i].Name[0] = '0'+i;
181 gVT_Terminals[i].Name[1] = '\0';
182 gVT_Terminals[i].Node.Inode = i;
183 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
184 gVT_Terminals[i].Node.NumACLs = 0; // Only root can open virtual terminals
186 gVT_Terminals[i].Node.Read = VT_Read;
187 gVT_Terminals[i].Node.Write = VT_Write;
188 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
192 DevFS_AddDevice( &gVT_DrvInfo );
194 // Set kernel output to VT0
195 Debug_SetKTerminal("/Devices/VTerm/0");
197 return MODULE_ERR_OK;
201 * \fn void VT_InitOutput()
202 * \brief Initialise Video Output
206 giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
211 * \fn void VT_InitInput()
212 * \brief Initialises the input
216 giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
217 if(giVT_InputDevHandle == -1) return ;
218 VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
222 * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
223 * \brief Read from the VTerm Directory
225 char *VT_ReadDir(tVFS_Node *Node, int Pos)
227 if(Pos < 0) return NULL;
228 if(Pos >= NUM_VTS) return NULL;
229 return strdup( gVT_Terminals[Pos].Name );
233 * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
234 * \brief Find an item in the VTerm directory
236 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
240 //ENTER("pNode sName", Node, Name);
242 // Open the input and output files if needed
243 if(giVT_OutputDevHandle == -2) VT_InitOutput();
244 if(giVT_InputDevHandle == -2) VT_InitInput();
247 if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
258 //LEAVE('p', &gVT_Terminals[num].Node);
259 return &gVT_Terminals[num].Node;
263 * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
264 * \brief Control the VTerm Driver
266 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
271 case DRV_IOCTL_TYPE: return DRV_TYPE_MISC;
272 case DRV_IOCTL_IDENT: memcpy(Data, "VT\0\0", 4); return 0;
273 case DRV_IOCTL_VERSION: return VERSION;
274 case DRV_IOCTL_LOOKUP: return 0;
276 case 4: // Get Video Driver
277 if(Data) strcpy(Data, gsVT_OutputDevice);
278 return strlen(gsVT_OutputDevice);
280 case 5: // Set Video Driver
281 if(!Data) return -EINVAL;
282 if(Threads_GetUID() != 0) return -EACCES;
286 free(gsVT_OutputDevice);
288 gsVT_OutputDevice = malloc(len+1);
289 strcpy(gsVT_OutputDevice, Data);
291 VFS_Close(giVT_OutputDevHandle);
292 giVT_OutputDevHandle = -1;
301 * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
302 * \brief Read from a virtual terminal
304 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
307 tVTerm *term = &gVT_Terminals[ Node->Inode ];
309 // Check current mode
315 while(term->InputRead == term->InputWrite) Threads_Yield();
317 ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
320 term->InputRead %= MAX_INPUT_CHARS8;
328 while(term->InputRead == term->InputWrite) Threads_Yield();
329 ((Uint32*)Buffer)[pos] = ((Uint32*)term->InputBuffer)[term->InputRead];
332 term->InputRead %= MAX_INPUT_CHARS32;
340 * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
341 * \brief Write to a virtual terminal
343 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
345 tVTerm *term = &gVT_Terminals[ Node->Inode ];
347 //ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
353 VT_int_PutString(term, Buffer, Length);
356 if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
360 x = Offset/4; y = x / term->Width; x %= term->Width;
361 w = Length/4+x; h = w / term->Width; w %= term->Width;
364 VFS_WriteAt( giVT_OutputDevHandle,
365 (x+y*term->RealWidth)*4,
369 Buffer = (void*)( (Uint)Buffer + term->Width*term->Height*4 );
375 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
384 * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
385 * \brief Call an IO Control on a virtual terminal
387 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
390 tVTerm *term = Node->ImplPtr;
391 ENTER("pNode iId pData", Node, Id, Data);
393 if(Id >= DRV_IOCTL_LOOKUP) {
394 if( Threads_GetUID() != 0 ) return -1;
400 LEAVE('i', DRV_TYPE_TERMINAL);
401 return DRV_TYPE_TERMINAL;
402 case DRV_IOCTL_IDENT:
403 memcpy(Data, "VT\0\0", 4);
406 case DRV_IOCTL_VERSION:
409 case DRV_IOCTL_LOOKUP:
413 // Get/Set the mode (and apply any changes)
414 case TERM_IOCTL_MODETYPE:
417 if(term->Mode != *iData)
418 VT_int_ChangeMode(term, *iData);
420 // Update the screen dimensions
421 if(giVT_CurrentTerminal == Node->Inode)
422 VT_SetTerminal( giVT_CurrentTerminal );
424 LEAVE('i', term->Mode);
427 // Get/set the terminal width
428 case TERM_IOCTL_WIDTH:
429 if(Data != NULL) term->Width = *iData;
430 Log("VT_Terminal_IOCtl - RETURN term->Width = %i", term->Width);
431 LEAVE('i', term->Width);
434 // Get/set the terminal height
435 case TERM_IOCTL_HEIGHT:
436 if(Data != NULL) term->Height = *iData;
437 Log("VT_Terminal_IOCtl - RETURN term->Height = %i", term->Height);
438 LEAVE('i', term->Height);
441 case TERM_IOCTL_FORCESHOW:
442 VT_SetTerminal( Node->Inode );
450 void VT_SetResolution(int IsTextMode, int Width, int Height)
452 tVideo_IOCtl_Mode mode = {0};
455 // Create the video mode
457 mode.height = Height;
462 VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
464 giVT_RealWidth = mode.width;
465 giVT_RealHeight = mode.height;
466 VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
471 tmp = VIDEO_BUFFMT_TEXT;
473 tmp = VIDEO_BUFFMT_FRAMEBUFFER;
474 VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp );
478 * \fn void VT_SetTerminal(int ID)
479 * \brief Set the current terminal
481 void VT_SetTerminal(int ID)
483 // Update current terminal ID
484 Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
485 giVT_CurrentTerminal = ID;
486 gpVT_CurTerm = &gVT_Terminals[ID];
489 if( !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR) )
491 tVideo_IOCtl_Pos pos;
492 pos.x = gpVT_CurTerm->WritePos % gpVT_CurTerm->Width;
493 pos.y = gpVT_CurTerm->WritePos / gpVT_CurTerm->Width;
494 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
498 VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
502 * \fn void VT_KBCallBack(Uint32 Codepoint)
503 * \brief Called on keyboard interrupt
504 * \param Codepoint Pseudo-UTF32 character
506 * Handles a key press and sends the key code to the user's buffer.
507 * If the code creates a kernel-magic sequence, it is not passed to the
508 * user and is handled in-kernel.
510 void VT_KBCallBack(Uint32 Codepoint)
512 tVTerm *term = &gVT_Terminals[giVT_CurrentTerminal];
514 // How the hell did we get a Codepoint of zero?
515 if(Codepoint == 0) return;
518 if( Codepoint & 0x80000000 )
520 Codepoint &= 0x7FFFFFFF;
524 case KEY_RSHIFT: gbVT_CtrlDown = 0; break;
525 case KEY_LSHIFT: gbVT_AltDown = 0; break;
543 case KEY_RSHIFT: gbVT_CtrlDown = 1; break;
544 case KEY_LSHIFT: gbVT_AltDown = 1; break;
558 if(!gbVT_AltDown || !gbVT_CtrlDown)
563 case KEY_F1: VT_SetTerminal(0); return;
564 case KEY_F2: VT_SetTerminal(1); return;
565 case KEY_F3: VT_SetTerminal(2); return;
566 case KEY_F4: VT_SetTerminal(3); return;
567 case KEY_F5: VT_SetTerminal(4); return;
568 case KEY_F6: VT_SetTerminal(5); return;
569 case KEY_F7: VT_SetTerminal(6); return;
570 case KEY_F8: VT_SetTerminal(7); return;
571 case KEY_F9: VT_SetTerminal(8); return;
572 case KEY_F10: VT_SetTerminal(9); return;
573 case KEY_F11: VT_SetTerminal(10); return;
574 case KEY_F12: VT_SetTerminal(11); return;
576 if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
577 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
579 gpVT_CurTerm->ViewPos = 0;
582 if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1)) )
583 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
585 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*(gpVT_CurTerm->Height*(VT_SCROLLBACK-1));
591 if(term->Mode == TERM_MODE_TEXT)
596 // Ignore Modifer Keys
597 if(Codepoint > KEY_MODIFIERS) return;
599 // Get UTF-8/ANSI Encoding
603 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'D';
607 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'C';
611 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'A';
615 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'B';
620 buf[0] = '\x1B'; buf[1] = '['; buf[2] = '5'; // Some overline also
621 //len = 4; // Commented out until I'm sure
627 // Attempt to encode in UTF-8
629 len = WriteUTF8( buf, Codepoint );
631 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
637 // Unprintable / Don't Pass
642 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
643 memcpy( &term->InputBuffer[term->InputWrite], buf, len );
645 memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
646 memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
648 // Roll the buffer over
649 term->InputWrite += len;
650 term->InputWrite %= MAX_INPUT_CHARS8;
651 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
652 term->InputRead = term->InputWrite + 1;
653 term->InputRead %= MAX_INPUT_CHARS8;
659 // Encode the raw UTF-32 Key
660 ((Uint32*)term->InputBuffer)[ term->InputWrite ] = Codepoint;
662 term->InputWrite %= MAX_INPUT_CHARS32;
663 if(term->InputRead == term->InputWrite) {
665 term->InputRead %= MAX_INPUT_CHARS32;
671 * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
672 * \brief Print a string to the Virtual Terminal
674 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
678 for( i = 0; i < Count; i++ )
680 if( Buffer[i] == 0x1B ) // Escape Sequence
683 i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
687 if( Buffer[i] < 128 ) // Plain ASCII
688 VT_int_PutChar(Term, Buffer[i]);
690 i += ReadUTF8(&Buffer[i], &val);
691 VT_int_PutChar(Term, val);
696 if( Term == gpVT_CurTerm && !(Term->Flags & VT_FLAG_HIDECSR) )
698 tVideo_IOCtl_Pos pos;
699 pos.x = Term->WritePos % Term->Width;
700 pos.y = Term->WritePos / Term->Width;
701 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
706 * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
707 * \brief Clears a line in a virtual terminal
709 void VT_int_ClearLine(tVTerm *Term, int Num)
712 //ENTER("pTerm iNum", Term, Num);
713 for( i = Term->Width; i--; )
715 Term->Text[ Num*Term->Width + i ].Ch = 0;
716 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
722 * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
723 * \brief Parses a VT100 Escape code
725 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
730 int args[4] = {0,0,0,0};
738 while('0' <= c && c <= '9') {
743 if( j != 1 ) argc ++;
746 // Get string (what does this do?)
754 if( ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
760 if(argc == 1) tmp = args[0];
763 if( Term->WritePos-(tmp-1) % Term->Width == 0 )
764 Term->WritePos -= Term->WritePos % Term->Width;
766 Term->WritePos -= tmp;
771 if(argc == 1) tmp = args[0];
773 if( (Term->WritePos + tmp) % Term->Width == 0 ) {
774 Term->WritePos -= Term->WritePos % Term->Width;
775 Term->WritePos += Term->Width - 1;
777 Term->WritePos += tmp;
787 int i = Term->Height * VT_SCROLLBACK;
788 while( i-- ) VT_int_ClearLine(Term, i);
791 VT_int_UpdateScreen(Term, 1);
801 if( 0 <= args[argc] && args[argc] <= 8)
805 case 0: Term->CurColour = DEFAULT_COLOUR; break; // Reset
806 case 1: Term->CurColour |= 0x80000000; break; // Bright
807 case 2: Term->CurColour &= ~0x80000000; break; // Dim
811 else if(30 <= args[argc] && args[argc] <= 37) {
812 Term->CurColour &= 0xF000FFFF;
813 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
816 else if(40 <= args[argc] && args[argc] <= 47) {
817 Term->CurColour &= 0xFFFF8000;
818 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
834 * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
835 * \brief Write a single character to a VTerm
837 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
840 //ENTER("pTerm xCh", Term, Ch);
841 //LOG("Term = {WritePos:%i, ViewPos:%i}", Term->WritePos, Term->ViewPos);
845 case '\0': return; // Ignore NULL byte
847 Term->WritePos += Term->Width;
849 Term->WritePos -= Term->WritePos % Term->Width;
854 Term->Text[ Term->WritePos ].Ch = '\0';
855 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
857 } while(Term->WritePos & 7);
861 // Backspace is invalid at Offset 0
862 if(Term->WritePos == 0) break;
866 if(Term->Text[ Term->WritePos ].Ch != '\0') {
867 Term->Text[ Term->WritePos ].Ch = 0;
868 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
872 i = 7; // Limit it to 8
874 Term->Text[ Term->WritePos ].Ch = 0;
875 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
877 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\0');
878 if(Term->Text[ Term->WritePos ].Ch != '\0')
883 Term->Text[ Term->WritePos ].Ch = Ch;
884 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
891 if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
894 Term->WritePos -= Term->Width;
896 // Update view position
897 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
898 if(Term->ViewPos < base) Term->ViewPos += Term->Width;
899 if(Term->ViewPos > base) Term->ViewPos = base;
901 // Scroll terminal cache
902 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
907 &Term->Text[Term->Width],
908 Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
912 for( i = 0; i < Term->Width; i ++ )
914 Term->Text[ base + i ].Ch = 0;
915 Term->Text[ base + i ].Colour = Term->CurColour;
918 VT_int_UpdateScreen( Term, 1 );
920 else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
922 Term->ViewPos += Term->Width;
923 VT_int_UpdateScreen( Term, 1 );
926 VT_int_UpdateScreen( Term, 0 );
932 * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
933 * \brief Updates the video framebuffer
935 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
937 // Only update if this is the current terminal
938 if( Term != &gVT_Terminals[giVT_CurrentTerminal] ) return;
940 if( Term->Mode == TERM_MODE_TEXT )
946 giVT_OutputDevHandle,
948 Term->Width*Term->Height*sizeof(tVT_Char),
949 &Term->Text[Term->ViewPos]
952 int pos = Term->WritePos - Term->WritePos % Term->Width;
954 giVT_OutputDevHandle,
955 (pos - Term->ViewPos)*sizeof(tVT_Char),
956 Term->Width*sizeof(tVT_Char),
963 //TODO: Do VT Rendered Text
966 VT_RenderText(0, Term->Width*Term->Height, &Term->Text[Term->ViewPos]);
969 int pos = Term->WritePos - Term->WritePos % Term->Width;
982 giVT_OutputDevHandle,
984 Term->Width*Term->Height*sizeof(Uint32),
991 * \fn void VT_int_ChangeMode(tVTerm *Term, int NewMode)
992 * \brief Change the mode of a VTerm
994 void VT_int_ChangeMode(tVTerm *Term, int NewMode)
1000 Term->Text = calloc( Term->Width*Term->Height*VT_SCROLLBACK, sizeof(tVT_Char) );
1004 Term->Buffer = calloc( Term->Width*Term->Height, sizeof(Uint32) );
1006 //case TERM_MODE_OPENGL:
1010 Term->Mode = NewMode;
1016 #define MONOSPACE_FONT 10816
1018 #if MONOSPACE_FONT == 10808 // 8x8
1019 # include "vterm_font_8x8.h"
1020 #elif MONOSPACE_FONT == 10816 // 8x16
1021 # include "vterm_font_8x16.h"
1024 // === PROTOTYPES ===
1025 Uint8 *VT_Font_GetChar(Uint32 Codepoint);
1028 int giVT_CharWidth = FONT_WIDTH+1;
1029 int giVT_CharHeight = FONT_HEIGHT;
1033 * \fn void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1034 * \brief Render a font character
1036 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Pitch, Uint32 BGC, Uint32 FGC)
1039 Uint32 *buf = Buffer;
1042 font = VT_Font_GetChar(Codepoint);
1044 for(y = 0; y < FONT_HEIGHT; y ++)
1046 for(x = 0; x < FONT_WIDTH; x ++)
1048 if(*font & (1 << (FONT_WIDTH-x-1)))
1059 * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1062 Uint32 VT_Colour12to24(Uint16 Col12)
1067 ret = (tmp << 0) | (tmp << 4);
1068 tmp = (Col12 & 0xF0) >> 4;
1069 ret |= (tmp << 8) | (tmp << 12);
1070 tmp = (Col12 & 0xF00) >> 8;
1071 ret |= (tmp << 16) | (tmp << 20);
1076 * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1077 * \brief Gets an index into the font array given a Unicode Codepoint
1078 * \note See http://en.wikipedia.org/wiki/CP437
1080 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1084 return &VTermFont[Codepoint*FONT_HEIGHT];
1087 case 0xC7: index = 128; break; // Ç
1088 case 0xFC: index = 129; break; // ü
1089 case 0xE9: index = 130; break; // é
1090 case 0xE2: index = 131; break; // â
1091 case 0xE4: index = 132; break; // ä
1092 case 0xE0: index = 133; break; // à
1093 case 0xE5: index = 134; break; // å
1094 case 0xE7: index = 135; break; // ç
1095 case 0xEA: index = 136; break; // ê
1096 case 0xEB: index = 137; break; // ë
1097 case 0xE8: index = 138; break; // è
1098 case 0xEF: index = 139; break; // ï
1099 case 0xEE: index = 140; break; // î
1100 case 0xEC: index = 141; break; // ì
1101 case 0xC4: index = 142; break; // Ä
1102 case 0xC5: index = 143; break; // Å
1105 return &VTermFont[index*FONT_HEIGHT];
1108 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1109 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1110 EXPORT(VT_Font_Render);
1111 EXPORT(VT_Colour12to24);