2 * Acess2 Virtual Terminal Driver
7 #include <tpl_drv_video.h>
11 #define MAX_INPUT_CHARS 64
12 #define VT_SCROLLBACK 4 // 4 Screens of text
13 #define DEFAULT_OUTPUT "/Devices/VGA"
14 #define DEFAULT_INPUT "/Devices/PS2Keyboard"
15 #define DEFAULT_WIDTH 80
16 #define DEFAULT_HEIGHT 25
17 #define DEFAULT_COLOUR (VT_COL_BLACK|(VT_COL_WHITE<<16))
20 VT_MODE_TEXT8, // UTF-8 Text Mode (VT100 Emulation)
21 VT_MODE_TEXT32, // UTF-32 Text Mode (Acess Native)
22 VT_MODE_8BPP, // 256 Colour Mode
23 VT_MODE_16BPP, // 16 bit Colour Mode
24 VT_MODE_24BPP, // 24 bit Colour Mode
25 VT_MODE_32BPP, // 32 bit Colour Mode
33 int ViewPos, WritePos;
38 Uint32 InputBuffer[MAX_INPUT_CHARS];
47 int VT_Install(char **Arguments);
48 char *VT_ReadDir(tVFS_Node *Node, int Pos);
49 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name);
50 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
51 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
52 int VT_IOCtl(tVFS_Node *Node, int Id, void *Data);
53 void VT_KBCallBack(Uint32 Codepoint);
54 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
55 int VT_int_ParseEscape(tVTerm *Term, char *Buffer);
56 void VT_int_PutChar(tVTerm *Term, Uint32 Ch);
57 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
60 const Uint16 caVT100Colours[] = {
61 VT_COL_BLACK, 0, 0, 0, 0, 0, 0, VT_COL_LTGREY,
62 VT_COL_GREY, 0, 0, 0, 0, 0, 0, VT_COL_WHITE
66 MODULE_DEFINE(0, 0x0032, VTerm, VT_Install, NULL, NULL);
67 tDevFS_Driver gVT_DrvInfo = {
70 .Flags = VFS_FFLAG_DIRECTORY,
73 .ReadDir = VT_ReadDir,
77 tVTerm gVT_Terminals[NUM_VTS];
78 char *gsVT_OutputDevice = NULL;
79 char *gsVT_InputDevice = NULL;
80 int giVT_OutputDevHandle = -2;
81 int giVT_InputDevHandle = -2;
82 int giVT_CurrentTerminal = 0;
86 * \fn int VT_Install(char **Arguments)
88 int VT_Install(char **Arguments)
90 char **args = Arguments;
97 for( ; (arg = *args); args++ )
99 if(arg[0] != '-') continue;
105 if(args[1] == NULL) break;
106 if(gsVT_OutputDevice) free(gsVT_OutputDevice);
107 gsVT_OutputDevice = malloc(strlen(args[1])+1);
108 strcpy(gsVT_OutputDevice, args[1]);
114 if(args[1] == NULL) break;
115 if(gsVT_InputDevice) free(gsVT_InputDevice);
116 gsVT_InputDevice = malloc(strlen(args[1])+1);
117 strcpy(gsVT_InputDevice, args[1]);
126 if(!gsVT_OutputDevice) gsVT_OutputDevice = DEFAULT_OUTPUT;
127 if(!gsVT_InputDevice) gsVT_InputDevice = DEFAULT_INPUT;
129 LOG("Using '%s' as output", gsVT_OutputDevice);
130 LOG("Using '%s' as input", gsVT_InputDevice);
133 for( i = 0; i < NUM_VTS; i++ )
135 gVT_Terminals[i].Mode = VT_MODE_TEXT8;
136 gVT_Terminals[i].Width = DEFAULT_WIDTH;
137 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
138 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
139 gVT_Terminals[i].WritePos = 0;
140 gVT_Terminals[i].ViewPos = 0;
142 gVT_Terminals[i].Buffer = malloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*sizeof(tVT_Char) );
143 memset( gVT_Terminals[i].Buffer, 0, DEFAULT_WIDTH*DEFAULT_HEIGHT*sizeof(tVT_Char) );
145 gVT_Terminals[i].Name[0] = '0'+i;
146 gVT_Terminals[i].Name[1] = '\0';
147 gVT_Terminals[i].Node.Inode = i;
148 gVT_Terminals[i].Node.NumACLs = 0; // Only root can open virtual terminals
150 gVT_Terminals[i].Node.Read = VT_Read;
151 gVT_Terminals[i].Node.Write = VT_Write;
152 gVT_Terminals[i].Node.IOCtl = VT_IOCtl;
156 DevFS_AddDevice( &gVT_DrvInfo );
162 * \fn void VT_InitOutput()
163 * \brief Initialise Video Output
167 giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
168 LOG("giVT_OutputDevHandle = %x\n", giVT_OutputDevHandle);
172 * \fn void VT_InitInput()
173 * \brief Initialises the input
177 giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
178 LOG("giVT_InputDevHandle = %x\n", giVT_InputDevHandle);
182 * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
183 * \brief Read from the VTerm Directory
185 char *VT_ReadDir(tVFS_Node *Node, int Pos)
187 if(Pos < 0) return NULL;
188 if(Pos >= NUM_VTS) return NULL;
189 return gVT_Terminals[Pos].Name;
193 * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
194 * \brief Find an item in the VTerm directory
196 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
200 //ENTER("pNode sName", Node, Name);
202 // Open the input and output files if needed
203 if(giVT_OutputDevHandle == -2) VT_InitOutput();
204 if(giVT_InputDevHandle == -2) VT_InitInput();
207 if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
218 //LEAVE('p', &gVT_Terminals[num].Node);
219 return &gVT_Terminals[num].Node;
223 * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
224 * \brief Read from a virtual terminal
226 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
229 tVTerm *term = &gVT_Terminals[ Node->Inode ];
231 // Check current mode
237 while(term->InputRead == term->InputWrite) Proc_Yield();
238 while(term->InputRead != term->InputWrite)
240 pos += WriteUTF8(Buffer+pos, term->InputBuffer[term->InputRead]);
249 while(term->InputRead == term->InputWrite) Proc_Yield();
250 while(term->InputRead != term->InputWrite)
252 ((Uint32*)Buffer)[pos] = term->InputBuffer[term->InputRead];
263 * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
264 * \brief Write to a virtual terminal
266 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
268 tVTerm *term = &gVT_Terminals[ Node->Inode ];
270 //ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
276 VT_int_PutString(term, Buffer, Length);
279 //VT_int_PutString32(term, Buffer, Length);
287 * \fn int VT_IOCtl(tVFS_Node *Node, int Id, void *Data)
288 * \brief Call an IO Control on a virtual terminal
290 int VT_IOCtl(tVFS_Node *Node, int Id, void *Data)
296 * \fn void VT_KBCallBack(Uint32 Codepoint)
297 * \brief Called on keyboard interrupt
299 void VT_KBCallBack(Uint32 Codepoint)
301 tVTerm *term = &gVT_Terminals[giVT_CurrentTerminal];
303 term->InputBuffer[ term->InputWrite ] = Codepoint;
305 term->InputWrite %= MAX_INPUT_CHARS;
306 if(term->InputRead == term->InputWrite) {
308 term->InputRead %= MAX_INPUT_CHARS;
313 * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
314 * \brief Print a string to the Virtual Terminal
316 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
320 for( i = 0; i < Count; i++ )
322 if( Buffer[i] == 0x1B ) // Escape Sequence
324 i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
328 if( Buffer[i] < 128 ) // Plain ASCII
329 VT_int_PutChar(Term, Buffer[i]);
331 i += ReadUTF8(&Buffer[i], &val);
332 VT_int_PutChar(Term, val);
338 * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
339 * \brief Parses a VT100 Escape code
341 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
345 int args[4] = {0,0,0,0};
353 while('0' <= c && c <= '9') {
361 // Get string (what does this do?)
369 if( ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
376 memset(Term->Text, 0, Term->Width*Term->Height*VT_SCROLLBACK*sizeof(tVT_Char));
386 if( 0 <= args[argc] && args[argc] <= 8)
390 case 0: Term->CurColour = DEFAULT_COLOUR; break; // Reset
391 case 1: Term->CurColour |= 0x80000000; break; // Bright
392 case 2: Term->CurColour &= ~0x80000000; break; // Dim
396 else if(30 <= args[argc] && args[argc] <= 37) {
397 Term->CurColour &= 0xF000FFFF;
398 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
401 else if(40 <= args[argc] && args[argc] <= 47) {
402 Term->CurColour &= 0xFFFF8000;
403 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
419 * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
420 * \brief Write a single character to a VTerm
422 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
425 //ENTER("pTerm xCh", Term, Ch);
426 //LOG("Term = {WritePos:%i, ViewPos:%i}\n", Term->WritePos, Term->ViewPos);
431 Term->WritePos += Term->Width;
433 Term->WritePos -= Term->WritePos % Term->Width;
438 Term->Text[ Term->WritePos ].Ch = '\t';
439 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
441 } while(Term->WritePos & 7);
445 // Backspace is invalid at Offset 0
446 if(Term->WritePos == 0) break;
450 if(Term->Text[ Term->WritePos ].Ch != '\t') {
451 Term->Text[ Term->WritePos ].Ch = 0;
452 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
456 i = 7; // Limit it to 8
458 Term->Text[ Term->WritePos ].Ch = 0;
459 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
461 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\t');
465 Term->Text[ Term->WritePos ].Ch = Ch;
466 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
471 if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
474 Term->WritePos -= Term->Width;
476 // Update view position
477 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
478 if(Term->ViewPos < base) Term->ViewPos += Term->Width;
479 if(Term->ViewPos > base) Term->ViewPos = base;
481 // Scroll terminal cache
482 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
485 memcpy( Term->Text, &Term->Text[Term->Width], base*sizeof(tVT_Char) );
488 for( i = 0; i < Term->Width; i ++ )
490 Term->Text[ base + i ].Ch = 0;
491 Term->Text[ base + i ].Colour = Term->CurColour;
494 VT_int_UpdateScreen( Term, 1 );
497 VT_int_UpdateScreen( Term, 0 );
503 * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
504 * \brief Updates the video framebuffer
506 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
510 giVT_OutputDevHandle,
512 Term->Width*Term->Height*sizeof(tVT_Char),
513 &Term->Text[Term->ViewPos]
516 int pos = Term->WritePos - Term->WritePos % Term->Width;
518 giVT_OutputDevHandle,
519 (pos - Term->ViewPos)*sizeof(tVT_Char),
520 Term->Width*sizeof(tVT_Char),
529 #define MONOSPACE_FONT 10816
531 #if MONOSPACE_FONT == 10808 // 8x8
532 # include "vterm_font_8x8.h"
533 #elif MONOSPACE_FONT == 10816 // 8x16
534 # include "vterm_font_8x16.h"
538 int VT_Font_GetWidth(Uint32 Codepoint)
542 int VT_Font_GetHeight(Uint32 Codepoint)
547 void VT_Font_Render(Uint32 Codepoint, void *Buffer, Uint32 BGC, Uint32 FGC)
554 * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
555 * \brief Gets an index into the font array given a Unicode Codepoint
556 * \note See http://en.wikipedia.org/wiki/CP437
558 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
562 return &VTermFont[Codepoint*FONT_HEIGHT];
565 case 0xC7: index = 128; break; // Ç
566 case 0xFC: index = 129; break; // ü
567 case 0xE9: index = 130; break; // é
568 case 0xE2: index = 131; break; // â
569 case 0xE4: index = 132; break; // ä
570 case 0xE0: index = 133; break; // à
571 case 0xE5: index = 134; break; // å
572 case 0xE7: index = 135; break; // ç
573 case 0xEA: index = 136; break; // ê
574 case 0xEB: index = 137; break; // ë
575 case 0xE8: index = 138; break; // è
576 case 0xEF: index = 139; break; // ï
577 case 0xEE: index = 140; break; // î
578 case 0xEC: index = 141; break; // ì
579 case 0xC4: index = 142; break; // Ä
580 case 0xC5: index = 143; break; // Å
583 return &VTermFont[index*FONT_HEIGHT];