2 * Acess2 Virtual Terminal Driver
8 #include <api_drv_video.h>
9 #include <api_drv_keyboard.h>
10 #include <api_drv_terminal.h>
12 #include <semaphore.h>
15 #define VERSION ((0<<8)|(50))
18 #define MAX_INPUT_CHARS32 64
19 #define MAX_INPUT_CHARS8 (MAX_INPUT_CHARS32*4)
20 //#define DEFAULT_OUTPUT "BochsGA"
21 #define DEFAULT_OUTPUT "Vesa"
22 #define FALLBACK_OUTPUT "x86_VGAText"
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_SCROLLBACK 0
28 #define DEFAULT_COLOUR (VT_COL_BLACK|(0xAAA<<16))
30 #define VT_FLAG_HIDECSR 0x01
31 #define VT_FLAG_ALTBUF 0x02 //!< Alternate screen buffer
32 #define VT_FLAG_RAWIN 0x04 //!< Don't handle ^Z/^C/^V
33 #define VT_FLAG_HASFB 0x10 //!< Set if the VTerm has requested the Framebuffer
36 VT_INMODE_TEXT8, // UTF-8 Text Mode (VT100/xterm Emulation)
37 VT_INMODE_TEXT32, // UTF-32 Text Mode (Acess Native)
43 int Mode; //!< Current Mode (see ::eTplTerminal_Modes)
44 int Flags; //!< Flags (see VT_FLAG_*)
46 short NewWidth; //!< Un-applied dimensions (Width)
47 short NewHeight; //!< Un-applied dimensions (Height)
48 short Width; //!< Virtual Width
49 short Height; //!< Virtual Height
50 short TextWidth; //!< Text Virtual Width
51 short TextHeight; //!< Text Virtual Height
53 Uint32 CurColour; //!< Current Text Colour
55 int ViewPos; //!< View Buffer Offset (Text Only)
56 int WritePos; //!< Write Buffer Offset (Text Only)
59 tVT_Char *AltBuf; //!< Alternate Screen Buffer
60 int AltWritePos; //!< Alternate write position
61 short ScrollTop; //!< Top of scrolling region (smallest)
62 short ScrollHeight; //!< Length of scrolling region
64 tMutex ReadingLock; //!< Lock the VTerm when a process is reading from it
65 tTID ReadingThread; //!< Owner of the lock
66 int InputRead; //!< Input buffer read position
67 int InputWrite; //!< Input buffer write position
68 char InputBuffer[MAX_INPUT_CHARS8];
69 // tSemaphore InputSemaphore;
73 char Name[2]; //!< Name of the terminal
78 extern void Debug_SetKTerminal(const char *File);
81 int VT_Install(char **Arguments);
82 void VT_InitOutput(void);
83 void VT_InitInput(void);
84 char *VT_ReadDir(tVFS_Node *Node, int Pos);
85 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name);
86 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
87 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
88 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
89 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
90 void VT_SetResolution(int Width, int Height);
91 void VT_SetMode(int Mode);
92 void VT_SetTerminal(int ID);
93 void VT_KBCallBack(Uint32 Codepoint);
94 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
95 void VT_int_ClearLine(tVTerm *Term, int Num);
96 int VT_int_ParseEscape(tVTerm *Term, char *Buffer);
97 void VT_int_PutChar(tVTerm *Term, Uint32 Ch);
98 void VT_int_ScrollText(tVTerm *Term, int Count);
99 void VT_int_ScrollFramebuffer( tVTerm *Term, int Count );
100 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
101 void VT_int_ChangeMode(tVTerm *Term, int NewMode, int NewWidth, int NewHeight);
102 void VT_int_ToggleAltBuffer(tVTerm *Term, int Enabled);
105 const Uint16 caVT100Colours[] = {
106 // Black, Red, Green, Yellow, Blue, Purple, Cyan, Gray
107 // Same again, but bright
108 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, 0xAAA,
109 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
113 MODULE_DEFINE(0, VERSION, VTerm, VT_Install, NULL, DEFAULT_INPUT, NULL);
114 tDevFS_Driver gVT_DrvInfo = {
117 .Flags = VFS_FFLAG_DIRECTORY,
121 .ReadDir = VT_ReadDir,
122 .FindDir = VT_FindDir,
123 .IOCtl = VT_Root_IOCtl
127 tVTerm gVT_Terminals[NUM_VTS];
128 int giVT_CurrentTerminal = 0;
129 tVTerm *gpVT_CurTerm = &gVT_Terminals[0];
130 // --- Video State ---
131 short giVT_RealWidth = DEFAULT_WIDTH; //!< Screen Width
132 short giVT_RealHeight = DEFAULT_HEIGHT; //!< Screen Height
133 int giVT_Scrollback = DEFAULT_SCROLLBACK;
134 // --- Driver Handles ---
135 char *gsVT_OutputDevice = NULL;
136 char *gsVT_InputDevice = NULL;
137 int giVT_OutputDevHandle = -2;
138 int giVT_InputDevHandle = -2;
139 // --- Key States --- (Used for VT Switching/Magic Combos)
140 int gbVT_CtrlDown = 0;
141 int gbVT_AltDown = 0;
142 int gbVT_SysrqDown = 0;
146 * \fn int VT_Install(char **Arguments)
147 * \brief Installs the Virtual Terminal Driver
149 int VT_Install(char **Arguments)
158 for(args = Arguments; (arg = *args); args++ )
160 char data[strlen(arg)+1];
164 val = strchr(arg, '=');
167 data[ val - arg ] = '\0';
170 Log_Debug("VTerm", "Argument '%s'", arg);
172 if( strcmp(opt, "Video") == 0 ) {
173 if( !gsVT_OutputDevice )
174 gsVT_OutputDevice = strdup(val);
176 else if( strcmp(opt, "Input") == 0 ) {
177 if( !gsVT_InputDevice )
178 gsVT_InputDevice = strdup(val);
180 else if( strcmp(opt, "Width") == 0 ) {
181 giVT_RealWidth = atoi( val );
183 else if( strcmp(opt, "Height") == 0 ) {
184 giVT_RealHeight = atoi( val );
186 else if( strcmp(opt, "Scrollback") == 0 ) {
187 giVT_Scrollback = atoi( val );
193 if(!gsVT_OutputDevice) gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
194 else if( Module_EnsureLoaded( gsVT_OutputDevice ) ) gsVT_OutputDevice = (char*)DEFAULT_OUTPUT;
195 if( Module_EnsureLoaded( gsVT_OutputDevice ) ) gsVT_OutputDevice = (char*)FALLBACK_OUTPUT;
196 if( Module_EnsureLoaded( gsVT_OutputDevice ) ) {
197 Log_Error("VTerm", "Fallback video '%s' is not avaliable, giving up", FALLBACK_OUTPUT);
198 return MODULE_ERR_MISC;
201 if(!gsVT_InputDevice) gsVT_InputDevice = (char*)DEFAULT_INPUT;
202 else if( Module_EnsureLoaded( gsVT_InputDevice ) ) gsVT_InputDevice = (char*)DEFAULT_INPUT;
204 // Create device paths
207 tmp = malloc( 9 + strlen(gsVT_OutputDevice) + 1 );
208 strcpy(tmp, "/Devices/");
209 strcpy(&tmp[9], gsVT_OutputDevice);
210 gsVT_OutputDevice = tmp;
212 tmp = malloc( 9 + strlen(gsVT_InputDevice) + 1 );
213 strcpy(tmp, "/Devices/");
214 strcpy(&tmp[9], gsVT_InputDevice);
215 gsVT_InputDevice = tmp;
218 Log_Log("VTerm", "Using '%s' as output", gsVT_OutputDevice);
219 Log_Log("VTerm", "Using '%s' as input", gsVT_InputDevice);
225 for( i = 0; i < NUM_VTS; i++ )
227 gVT_Terminals[i].Mode = TERM_MODE_TEXT;
228 gVT_Terminals[i].Flags = 0;
229 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
230 gVT_Terminals[i].WritePos = 0;
231 gVT_Terminals[i].AltWritePos = 0;
232 gVT_Terminals[i].ViewPos = 0;
233 gVT_Terminals[i].ReadingThread = -1;
234 gVT_Terminals[i].ScrollHeight = 0;
237 VT_int_ChangeMode( &gVT_Terminals[i],
238 TERM_MODE_TEXT, giVT_RealWidth, giVT_RealHeight );
240 gVT_Terminals[i].Name[0] = '0'+i;
241 gVT_Terminals[i].Name[1] = '\0';
242 gVT_Terminals[i].Node.Inode = i;
243 gVT_Terminals[i].Node.ImplPtr = &gVT_Terminals[i];
244 gVT_Terminals[i].Node.NumACLs = 0; // Only root can open virtual terminals
246 gVT_Terminals[i].Node.Read = VT_Read;
247 gVT_Terminals[i].Node.Write = VT_Write;
248 gVT_Terminals[i].Node.IOCtl = VT_Terminal_IOCtl;
249 // Semaphore_Init(&gVT_Terminals[i].InputSemaphore, 0, MAX_INPUT_CHARS8, "VTerm", gVT_Terminals[i].Name);
253 DevFS_AddDevice( &gVT_DrvInfo );
255 // Set kernel output to VT0
256 Debug_SetKTerminal("/Devices/VTerm/0");
258 return MODULE_ERR_OK;
262 * \fn void VT_InitOutput()
263 * \brief Initialise Video Output
267 giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
268 if(giVT_OutputDevHandle == -1) {
269 Log_Warning("VTerm", "Oh F**k, I can't open the video device '%s'", gsVT_OutputDevice);
272 VT_SetResolution( giVT_RealWidth, giVT_RealHeight );
274 VT_SetMode( VIDEO_BUFFMT_TEXT );
278 * \fn void VT_InitInput()
279 * \brief Initialises the input
283 giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
284 if(giVT_InputDevHandle == -1) {
285 Log_Warning("VTerm", "Can't open the input device '%s'", gsVT_InputDevice);
288 VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
292 * \brief Set the video resolution
293 * \param Width New screen width
294 * \param Height New screen height
296 void VT_SetResolution(int Width, int Height)
298 tVideo_IOCtl_Mode mode = {0};
302 // Create the video mode
304 mode.height = Height;
309 VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_FINDMODE, &mode );
311 if( Width != mode.width || Height != mode.height )
314 "Selected resolution (%ix%i is not supported) by the device, using (%ix%i)",
315 giVT_RealWidth, giVT_RealHeight,
316 mode.width, mode.height
319 VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_GETSETMODE, &tmp );
321 // Resize text terminals if needed
322 if( gVT_Terminals[0].Text && (giVT_RealWidth != mode.width || giVT_RealHeight != mode.height) )
324 int newBufSize = (giVT_RealWidth/giVT_CharWidth)
325 *(giVT_RealHeight/giVT_CharHeight)
326 *(giVT_Scrollback+1);
328 // Resize the text terminals
329 giVT_RealWidth = mode.width;
330 giVT_RealHeight = mode.height;
331 Log_Debug("VTerm", "Resizing terminals to %ix%i",
332 giVT_RealWidth/giVT_CharWidth, giVT_RealHeight/giVT_CharHeight);
333 for( i = 0; i < NUM_VTS; i ++ )
335 if( gVT_Terminals[i].Mode != TERM_MODE_TEXT ) continue;
337 gVT_Terminals[i].TextWidth = giVT_RealWidth/giVT_CharWidth;
338 gVT_Terminals[i].TextHeight = giVT_RealHeight/giVT_CharHeight;
339 gVT_Terminals[i].ScrollHeight = gVT_Terminals[i].TextHeight;
341 gVT_Terminals[i].Text = realloc(
342 gVT_Terminals[i].Text,
343 newBufSize*sizeof(tVT_Char)
350 * \brief Set video output buffer mode
352 void VT_SetMode(int Mode)
354 VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &Mode );
358 * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
359 * \brief Read from the VTerm Directory
361 char *VT_ReadDir(tVFS_Node *Node, int Pos)
363 if(Pos < 0) return NULL;
364 if(Pos >= NUM_VTS) return NULL;
365 return strdup( gVT_Terminals[Pos].Name );
369 * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
370 * \brief Find an item in the VTerm directory
371 * \param Node Root node
372 * \param Name Name (number) of the terminal
374 tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
378 ENTER("pNode sName", Node, Name);
380 // Open the input and output files if needed
381 if(giVT_OutputDevHandle == -2) VT_InitOutput();
382 if(giVT_InputDevHandle == -2) VT_InitInput();
385 if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
396 LEAVE('p', &gVT_Terminals[num].Node);
397 return &gVT_Terminals[num].Node;
401 * \fn int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
402 * \brief Control the VTerm Driver
404 int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
409 case DRV_IOCTL_TYPE: return DRV_TYPE_MISC;
410 case DRV_IOCTL_IDENT: memcpy(Data, "VT\0\0", 4); return 0;
411 case DRV_IOCTL_VERSION: return VERSION;
412 case DRV_IOCTL_LOOKUP: return 0;
414 case 4: // Get Video Driver
415 if(Data) strcpy(Data, gsVT_OutputDevice);
416 return strlen(gsVT_OutputDevice);
418 case 5: // Set Video Driver
419 if(!Data) return -EINVAL;
420 if(Threads_GetUID() != 0) return -EACCES;
424 // TODO: Check if the string used is a heap string
426 free(gsVT_OutputDevice);
428 gsVT_OutputDevice = malloc(len+1);
429 strcpy(gsVT_OutputDevice, Data);
431 VFS_Close(giVT_OutputDevHandle);
432 giVT_OutputDevHandle = -1;
441 * \brief Read from a virtual terminal
443 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
447 tVTerm *term = &gVT_Terminals[ Node->Inode ];
448 Uint32 *codepoint_buf = Buffer;
449 Uint32 *codepoint_in;
451 Mutex_Acquire( &term->ReadingLock );
454 if( term == gpVT_CurTerm && !(term->Flags & VT_FLAG_HIDECSR) )
456 tVideo_IOCtl_Pos csr_pos;
459 if(term->Flags & VT_FLAG_ALTBUF)
460 offset = term->AltWritePos;
462 offset = term->WritePos - term->ViewPos;
464 csr_pos.x = offset % term->TextWidth;
465 csr_pos.y = offset / term->TextWidth;
466 if( 0 <= csr_pos.y && csr_pos.y < term->TextHeight )
467 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &csr_pos);
470 // Check current mode
475 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UTF-8)");
477 avail = term->InputWrite - term->InputRead;
479 avail += MAX_INPUT_CHARS8;
480 if(avail > Length - pos)
481 avail = Length - pos;
485 ((char*)Buffer)[pos] = term->InputBuffer[term->InputRead];
488 while(term->InputRead > MAX_INPUT_CHARS8)
489 term->InputRead -= MAX_INPUT_CHARS8;
496 VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UCS-4)");
498 avail = term->InputWrite - term->InputRead;
500 avail += MAX_INPUT_CHARS32;
501 if(avail > Length - pos)
502 avail = Length/4 - pos;
504 codepoint_in = (void*)term->InputBuffer;
505 codepoint_buf = Buffer;
509 codepoint_buf[pos] = codepoint_in[term->InputRead];
512 while(term->InputRead > MAX_INPUT_CHARS32)
513 term->InputRead -= MAX_INPUT_CHARS32;
519 // Mark none avaliable if buffer empty
520 if( term->InputRead == term->InputWrite )
521 VFS_MarkAvaliable(&term->Node, 0);
523 term->ReadingThread = -1;
525 if( term == gpVT_CurTerm && !(term->Flags & VT_FLAG_HIDECSR) )
527 tVideo_IOCtl_Pos csr_pos;
528 csr_pos.x = -1; csr_pos.y = -1;
529 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &csr_pos);
532 Mutex_Release( &term->ReadingLock );
538 * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
539 * \brief Write to a virtual terminal
541 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
543 tVTerm *term = &gVT_Terminals[ Node->Inode ];
551 VT_int_PutString(term, Buffer, Length);
557 size = term->Width*term->Height*4;
558 if( Offset > size ) {
559 Log_Notice("VTerm", "VT_Write: Offset (0x%llx) > FBSize (0x%x)",
563 if( Offset + Length > size ) {
564 Log_Notice("VTerm", "VT_Write: Offset+Length (0x%llx) > FBSize (0x%x)",
565 Offset+Length, size);
566 Length = size - Offset;
569 // Copy to the local cache
570 memcpy( (void*)((Uint)term->Buffer + (Uint)Offset), Buffer, Length );
572 // Update screen if needed
573 if( Node->Inode == giVT_CurrentTerminal )
575 // Fill entire screen?
576 if( giVT_RealWidth > term->Width || giVT_RealHeight > term->Height )
578 // No? :( Well, just center it
580 x = Offset/4; y = x / term->Width; x %= term->Width;
581 w = Length/4+x; h = w / term->Width; w %= term->Width;
583 x += (giVT_RealWidth - term->Width) / 2;
584 y += (giVT_RealHeight - term->Height) / 2;
587 VFS_WriteAt( giVT_OutputDevHandle,
588 (x + y * giVT_RealWidth)*4,
592 Buffer = (void*)( (Uint)Buffer + term->Width*4 );
598 return VFS_WriteAt( giVT_OutputDevHandle, Offset, Length, Buffer );
601 // Just pass on (for now)
602 // TODO: Handle locally too to ensure no information is lost on
603 // VT Switch (and to isolate terminals from each other)
604 case TERM_MODE_2DACCEL:
605 //case TERM_MODE_3DACCEL:
606 if( Node->Inode == giVT_CurrentTerminal )
608 VFS_Write( giVT_OutputDevHandle, Length, Buffer );
617 * \fn int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
618 * \brief Call an IO Control on a virtual terminal
620 int VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data)
624 tVTerm *term = Node->ImplPtr;
625 ENTER("pNode iId pData", Node, Id, Data);
627 if(Id >= DRV_IOCTL_LOOKUP) {
628 // Only root can fiddle with graphics modes
629 // TODO: Remove this and replace with user ownership
630 if( Threads_GetUID() != 0 ) return -1;
637 LEAVE('i', DRV_TYPE_TERMINAL);
638 return DRV_TYPE_TERMINAL;
639 case DRV_IOCTL_IDENT:
640 memcpy(Data, "VT\0\0", 4);
643 case DRV_IOCTL_VERSION:
646 case DRV_IOCTL_LOOKUP:
650 // Get/Set the mode (and apply any changes)
651 case TERM_IOCTL_MODETYPE:
654 if( CheckMem(Data, sizeof(int)) == 0 ) {
658 Log_Log("VTerm", "VTerm %i mode set to %i", (int)Node->Inode, *iData);
660 // Update mode if needed
661 if( term->Mode != *iData
665 // Adjust for text mode
666 if( *iData == TERM_MODE_TEXT ) {
667 term->NewHeight *= giVT_CharHeight;
668 term->NewWidth *= giVT_CharWidth;
670 // Fill unchanged dimensions
671 if(term->NewHeight == 0) term->NewHeight = term->Height;
672 if(term->NewWidth == 0) term->NewWidth = term->Width;
674 VT_int_ChangeMode(term, *iData, term->NewWidth, term->NewHeight);
675 // Clear unapplied dimensions
680 // Update the screen dimensions
681 if(Node->Inode == giVT_CurrentTerminal)
682 VT_SetTerminal( giVT_CurrentTerminal );
684 LEAVE('i', term->Mode);
687 // Get/set the terminal width
688 case TERM_IOCTL_WIDTH:
690 if( CheckMem(Data, sizeof(int)) == 0 ) {
694 term->NewWidth = *iData;
697 ret = term->NewWidth;
698 else if( term->Mode == TERM_MODE_TEXT )
699 ret = term->TextWidth;
705 // Get/set the terminal height
706 case TERM_IOCTL_HEIGHT:
708 if( CheckMem(Data, sizeof(int)) == 0 ) {
712 term->NewHeight = *iData;
714 if( term->NewHeight )
715 ret = term->NewHeight;
716 else if( term->Mode == TERM_MODE_TEXT )
717 ret = term->TextHeight;
723 case TERM_IOCTL_FORCESHOW:
724 Log_Log("VTerm", "Thread %i forced VTerm %i to be shown",
725 Threads_GetTID(), (int)Node->Inode);
726 VT_SetTerminal( Node->Inode );
730 case TERM_IOCTL_GETCURSOR:
731 ret = (term->Flags & VT_FLAG_ALTBUF) ? term->AltWritePos : term->WritePos-term->ViewPos;
740 * \fn void VT_SetTerminal(int ID)
741 * \brief Set the current terminal
743 void VT_SetTerminal(int ID)
745 // Update current terminal ID
746 Log_Log("VTerm", "Changed terminal from %i to %i", giVT_CurrentTerminal, ID);
747 giVT_CurrentTerminal = ID;
748 gpVT_CurTerm = &gVT_Terminals[ID];
751 // TODO: Check if the reading lock is held
752 if( gpVT_CurTerm->Text && gpVT_CurTerm->Mode == TERM_MODE_TEXT
753 && !(gpVT_CurTerm->Flags & VT_FLAG_HIDECSR)
754 && Mutex_IsLocked( &gpVT_CurTerm->ReadingLock )
757 tVideo_IOCtl_Pos pos;
758 int offset = (gpVT_CurTerm->Flags & VT_FLAG_ALTBUF) ? gpVT_CurTerm->AltWritePos : gpVT_CurTerm->WritePos - gpVT_CurTerm->ViewPos;
759 pos.x = offset % gpVT_CurTerm->TextWidth;
760 pos.y = offset / gpVT_CurTerm->TextWidth;
761 if( 0 <= pos.y && pos.y < gpVT_CurTerm->TextHeight )
762 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
765 if( gpVT_CurTerm->Mode == TERM_MODE_TEXT )
766 VT_SetMode( VIDEO_BUFFMT_TEXT );
768 VT_SetMode( VIDEO_BUFFMT_FRAMEBUFFER );
771 VT_int_UpdateScreen( &gVT_Terminals[ ID ], 1 );
775 * \fn void VT_KBCallBack(Uint32 Codepoint)
776 * \brief Called on keyboard interrupt
777 * \param Codepoint Pseudo-UTF32 character
779 * Handles a key press and sends the key code to the user's buffer.
780 * If the code creates a kernel-magic sequence, it is not passed to the
781 * user and is handled in-kernel.
783 void VT_KBCallBack(Uint32 Codepoint)
785 tVTerm *term = gpVT_CurTerm;
787 // How the hell did we get a codepoint of zero?
788 if(Codepoint == 0) return;
791 if( Codepoint & 0x80000000 )
793 Codepoint &= 0x7FFFFFFF;
796 case KEY_LALT: gbVT_AltDown &= ~1; break;
797 case KEY_RALT: gbVT_AltDown &= ~2; break;
798 case KEY_LCTRL: gbVT_CtrlDown &= ~1; break;
799 case KEY_RCTRL: gbVT_CtrlDown &= ~2; break;
806 case KEY_LALT: gbVT_AltDown |= 1; break;
807 case KEY_RALT: gbVT_AltDown |= 2; break;
808 case KEY_LCTRL: gbVT_CtrlDown |= 1; break;
809 case KEY_RCTRL: gbVT_CtrlDown |= 2; break;
812 if(!gbVT_AltDown || !gbVT_CtrlDown)
816 case KEY_F1: VT_SetTerminal(0); return;
817 case KEY_F2: VT_SetTerminal(1); return;
818 case KEY_F3: VT_SetTerminal(2); return;
819 case KEY_F4: VT_SetTerminal(3); return;
820 case KEY_F5: VT_SetTerminal(4); return;
821 case KEY_F6: VT_SetTerminal(5); return;
822 case KEY_F7: VT_SetTerminal(6); return;
823 case KEY_F8: VT_SetTerminal(7); return;
824 case KEY_F9: VT_SetTerminal(8); return;
825 case KEY_F10: VT_SetTerminal(9); return;
826 case KEY_F11: VT_SetTerminal(10); return;
827 case KEY_F12: VT_SetTerminal(11); return;
830 if( gpVT_CurTerm->Flags & VT_FLAG_ALTBUF )
832 if( gpVT_CurTerm->ViewPos > gpVT_CurTerm->Width )
833 gpVT_CurTerm->ViewPos -= gpVT_CurTerm->Width;
835 gpVT_CurTerm->ViewPos = 0;
838 if( gpVT_CurTerm->Flags & VT_FLAG_ALTBUF )
840 if( gpVT_CurTerm->ViewPos < gpVT_CurTerm->Width*gpVT_CurTerm->Height*(giVT_Scrollback) )
841 gpVT_CurTerm->ViewPos += gpVT_CurTerm->Width;
843 gpVT_CurTerm->ViewPos = gpVT_CurTerm->Width*gpVT_CurTerm->Height*(giVT_Scrollback);
849 if(term->Mode == TERM_MODE_TEXT)
854 // Ignore Modifer Keys
855 if(Codepoint > KEY_MODIFIERS) return;
857 // Get UTF-8/ANSI Encoding
861 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'D';
865 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'C';
869 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'A';
873 buf[0] = '\x1B'; buf[1] = '['; buf[2] = 'B';
878 //buf[0] = '\x1B'; buf[1] = '['; buf[2] = '5'; // Some overline also
879 //len = 4; // Commented out until I'm sure
886 // Attempt to encode in UTF-8
888 len = WriteUTF8( buf, Codepoint );
890 Warning("Codepoint (%x) is unrepresentable in UTF-8", Codepoint);
896 // Unprintable / Don't Pass
901 // Handle meta characters
902 if( !(term->Flags & VT_FLAG_RAWIN) )
914 if( MAX_INPUT_CHARS8 - term->InputWrite >= len )
915 memcpy( &term->InputBuffer[term->InputWrite], buf, len );
917 memcpy( &term->InputBuffer[term->InputWrite], buf, MAX_INPUT_CHARS8 - term->InputWrite );
918 memcpy( &term->InputBuffer[0], buf, len - (MAX_INPUT_CHARS8 - term->InputWrite) );
920 // Roll the buffer over
921 term->InputWrite += len;
922 term->InputWrite %= MAX_INPUT_CHARS8;
923 if( (term->InputWrite - term->InputRead + MAX_INPUT_CHARS8)%MAX_INPUT_CHARS8 < len ) {
924 term->InputRead = term->InputWrite + 1;
925 term->InputRead %= MAX_INPUT_CHARS8;
930 // Encode the raw UTF-32 Key
931 Uint32 *raw_in = (void*)term->InputBuffer;
932 raw_in[ term->InputWrite ] = Codepoint;
934 term->InputWrite %= MAX_INPUT_CHARS32;
935 if(term->InputRead == term->InputWrite) {
937 term->InputRead %= MAX_INPUT_CHARS32;
941 VFS_MarkAvaliable(&term->Node, 1);
945 * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
946 * \brief Clears a line in a virtual terminal
948 void VT_int_ClearLine(tVTerm *Term, int Num)
953 if( Num < 0 || Num >= Term->TextHeight * (giVT_Scrollback + 1) ) return ;
955 cell = (Term->Flags & VT_FLAG_ALTBUF) ? Term->AltBuf : Term->Text;
956 cell = &cell[ Num*Term->TextWidth ];
958 for( i = Term->TextWidth; i--; )
961 cell[ i ].Colour = Term->CurColour;
966 * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
967 * \brief Parses a VT100 Escape code
969 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
974 int args[6] = {0,0,0,0};
975 int bQuestionMark = 0;
987 if( '0' <= c && c <= '9' )
990 if(c == ';') c = Buffer[j++];
991 while('0' <= c && c <= '9') {
1001 if( ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
1007 // DEC Private Mode Set
1009 if(argc != 1) break;
1013 VT_int_ToggleAltBuffer(Term, 1);
1018 if(argc != 1) break;
1022 VT_int_ToggleAltBuffer(Term, 0);
1027 Log_Warning("VTerm", "Unknown control sequence '\\x1B[?%c'", c);
1041 if(argc == 1) tmp *= args[0];
1042 if( Term->Flags & VT_FLAG_ALTBUF )
1044 if( (Term->AltWritePos + tmp) % Term->TextWidth == 0 ) {
1045 Term->AltWritePos -= Term->AltWritePos % Term->TextWidth;
1046 Term->AltWritePos += Term->TextWidth - 1;
1049 Term->AltWritePos += tmp;
1053 if( (Term->WritePos + tmp) % Term->TextWidth == 0 ) {
1054 Term->WritePos -= Term->WritePos % Term->TextWidth;
1055 Term->WritePos += Term->TextWidth - 1;
1058 Term->WritePos += tmp;
1066 case 0: // Erase below
1068 case 1: // Erase above
1070 case 2: // Erase all
1071 if( Term->Flags & VT_FLAG_ALTBUF )
1073 int i = Term->TextHeight;
1074 while( i-- ) VT_int_ClearLine(Term, i);
1075 Term->AltWritePos = 0;
1076 VT_int_UpdateScreen(Term, 1);
1080 int i = Term->TextHeight * (giVT_Scrollback + 1);
1081 while( i-- ) VT_int_ClearLine(Term, i);
1084 VT_int_UpdateScreen(Term, 1);
1094 case 0: // Erase to right
1095 if( Term->Flags & VT_FLAG_ALTBUF )
1098 max = Term->Width - Term->AltWritePos % Term->Width;
1099 for( i = 0; i < max; i ++ )
1100 Term->AltBuf[Term->AltWritePos+i].Ch = 0;
1105 max = Term->Width - Term->WritePos % Term->Width;
1106 for( i = 0; i < max; i ++ )
1107 Term->Text[Term->WritePos+i].Ch = 0;
1109 VT_int_UpdateScreen(Term, 0);
1111 case 1: // Erase to left
1112 if( Term->Flags & VT_FLAG_ALTBUF )
1114 int i = Term->AltWritePos % Term->Width;
1116 Term->AltBuf[Term->AltWritePos++].Ch = 0;
1120 int i = Term->WritePos % Term->Width;
1122 Term->Text[Term->WritePos++].Ch = 0;
1124 VT_int_UpdateScreen(Term, 0);
1126 case 2: // Erase all
1127 if( Term->Flags & VT_FLAG_ALTBUF )
1129 VT_int_ClearLine(Term, Term->AltWritePos / Term->Width);
1133 VT_int_ClearLine(Term, Term->WritePos / Term->Width);
1135 VT_int_UpdateScreen(Term, 0);
1140 // Set cursor position
1142 if( Term->Flags & VT_FLAG_ALTBUF )
1143 Term->AltWritePos = args[0] + args[1]*Term->TextWidth;
1145 Term->WritePos = args[0] + args[1]*Term->TextWidth;
1146 //Log_Debug("VTerm", "args = {%i, %i}", args[0], args[1]);
1149 // Scroll up `n` lines
1152 // Scroll down `n` lines
1154 if(argc == 1) tmp *= args[0];
1155 if( Term->Flags & VT_FLAG_ALTBUF )
1156 VT_int_ScrollText(Term, tmp);
1159 if(Term->ViewPos/Term->TextWidth + tmp < 0)
1161 if(Term->ViewPos/Term->TextWidth + tmp > Term->TextHeight * (giVT_Scrollback + 1))
1164 Term->ViewPos += Term->TextWidth*tmp;
1173 if( 0 <= args[argc] && args[argc] <= 8)
1177 case 0: Term->CurColour = DEFAULT_COLOUR; break; // Reset
1178 case 1: Term->CurColour |= 0x80000000; break; // Bright
1179 case 2: Term->CurColour &= ~0x80000000; break; // Dim
1182 // Foreground Colour
1183 else if(30 <= args[argc] && args[argc] <= 37) {
1184 Term->CurColour &= 0xF000FFFF;
1185 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
1187 // Background Colour
1188 else if(40 <= args[argc] && args[argc] <= 47) {
1189 Term->CurColour &= 0xFFFF8000;
1190 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
1195 // Set scrolling region
1197 if( argc != 2 ) break;
1198 Term->ScrollTop = args[0];
1199 Term->ScrollHeight = args[1] - args[0];
1203 Log_Warning("VTerm", "Unknown control sequence '\\x1B[%c'", c);
1213 //Log_Debug("VTerm", "j = %i, Buffer = '%s'", j, Buffer);
1218 * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
1219 * \brief Print a string to the Virtual Terminal
1221 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
1227 for( i = 0; i < Count; i++ )
1229 // Handle escape sequences
1230 if( Buffer[i] == 0x1B )
1233 i += VT_int_ParseEscape(Term, (char*)&Buffer[i]) - 1;
1237 // Fast check for non UTF-8
1238 if( Buffer[i] < 128 ) // Plain ASCII
1239 VT_int_PutChar(Term, Buffer[i]);
1241 i += ReadUTF8(&Buffer[i], &val) - 1;
1242 VT_int_PutChar(Term, val);
1246 VT_int_UpdateScreen( Term, 0 );
1250 * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
1251 * \brief Write a single character to a VTerm
1253 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
1259 if(Term->Flags & VT_FLAG_ALTBUF) {
1260 buffer = Term->AltBuf;
1261 write_pos = Term->AltWritePos;
1264 buffer = Term->Text;
1265 write_pos = Term->WritePos;
1270 case '\0': return; // Ignore NULL byte
1272 VT_int_UpdateScreen( Term, 0 ); // Update the line before newlining
1273 write_pos += Term->TextWidth;
1275 write_pos -= write_pos % Term->TextWidth;
1278 case '\t': { int tmp = write_pos / Term->TextWidth;
1279 write_pos %= Term->TextWidth;
1281 buffer[ write_pos ].Ch = '\0';
1282 buffer[ write_pos ].Colour = Term->CurColour;
1284 } while(write_pos & 7);
1285 write_pos += tmp * Term->TextWidth;
1289 // Backspace is invalid at Offset 0
1290 if(write_pos == 0) break;
1294 if(buffer[ write_pos ].Ch != '\0') {
1295 buffer[ write_pos ].Ch = 0;
1296 buffer[ write_pos ].Colour = Term->CurColour;
1300 i = 7; // Limit it to 8
1302 buffer[ write_pos ].Ch = 0;
1303 buffer[ write_pos ].Colour = Term->CurColour;
1305 } while(write_pos && i-- && buffer[ write_pos ].Ch == '\0');
1306 if(buffer[ write_pos ].Ch != '\0')
1311 buffer[ write_pos ].Ch = Ch;
1312 buffer[ write_pos ].Colour = Term->CurColour;
1313 // Update the line before wrapping
1314 if( (write_pos + 1) % Term->TextWidth == 0 )
1315 VT_int_UpdateScreen( Term, 0 );
1320 if(Term->Flags & VT_FLAG_ALTBUF)
1322 Term->AltBuf = buffer;
1323 Term->AltWritePos = write_pos;
1325 if(Term->AltWritePos >= Term->TextWidth*Term->TextHeight)
1327 Term->AltWritePos -= Term->TextWidth;
1328 VT_int_ScrollText(Term, 1);
1334 Term->Text = buffer;
1335 Term->WritePos = write_pos;
1337 // - Check if we need to scroll the entire scrollback buffer
1338 if(Term->WritePos >= Term->TextWidth*Term->TextHeight*(giVT_Scrollback+1))
1342 // Update previous line
1343 Term->WritePos -= Term->TextWidth;
1344 VT_int_UpdateScreen( Term, 0 );
1346 // Update view position
1347 base = Term->TextWidth*Term->TextHeight*(giVT_Scrollback);
1348 if(Term->ViewPos < base)
1349 Term->ViewPos += Term->Width;
1350 if(Term->ViewPos > base)
1351 Term->ViewPos = base;
1353 VT_int_ScrollText(Term, 1);
1355 // Ok, so we only need to scroll the screen
1356 else if(Term->WritePos >= Term->ViewPos + Term->TextWidth*Term->TextHeight)
1358 // Update the last line
1359 Term->WritePos -= Term->TextWidth;
1360 VT_int_UpdateScreen( Term, 0 );
1361 Term->WritePos += Term->TextWidth;
1363 VT_int_ScrollText(Term, 1);
1365 Term->ViewPos += Term->TextWidth;
1372 void VT_int_ScrollText(tVTerm *Term, int Count)
1375 int height, init_write_pos;
1377 int scroll_top, scroll_height;
1379 // Get buffer pointer and attributes
1380 if( Term->Flags & VT_FLAG_ALTBUF )
1383 height = Term->TextHeight;
1384 init_write_pos = Term->AltWritePos;
1385 scroll_top = Term->ScrollTop;
1386 scroll_height = Term->ScrollHeight;
1391 height = Term->TextHeight*(giVT_Scrollback+1);
1392 init_write_pos = Term->WritePos;
1394 scroll_height = height;
1397 // Scroll text downwards
1403 if(Count > scroll_height) Count = scroll_height;
1404 base = Term->TextWidth*(scroll_top + scroll_height - Count);
1405 len = Term->TextWidth*(scroll_height - Count);
1407 // Scroll terminal cache
1409 &buf[Term->TextWidth*scroll_top],
1410 &buf[Term->TextWidth*(scroll_top+Count)],
1411 len*sizeof(tVT_Char)
1414 for( i = 0; i < Term->TextWidth*Count; i ++ )
1416 buf[ base + i ].Ch = 0;
1417 buf[ base + i ].Colour = Term->CurColour;
1421 VT_int_ScrollFramebuffer( Term, Count );
1422 if( Term->Flags & VT_FLAG_ALTBUF )
1423 Term->AltWritePos = base;
1425 Term->WritePos = Term->ViewPos + Term->TextWidth*(Term->TextHeight - Count);
1426 for( i = 0; i < Count; i ++ )
1428 VT_int_UpdateScreen( Term, 0 );
1429 if( Term->Flags & VT_FLAG_ALTBUF )
1430 Term->AltWritePos += Term->TextWidth;
1432 Term->WritePos += Term->TextWidth;
1438 if(Count > scroll_height) Count = scroll_height;
1440 len = Term->TextWidth*(scroll_height - Count);
1442 // Scroll terminal cache
1444 &buf[Term->TextWidth*(scroll_top+Count)],
1445 &buf[Term->TextWidth*scroll_top],
1446 len*sizeof(tVT_Char)
1448 // Clear preceding rows
1449 for( i = 0; i < Term->TextWidth*Count; i ++ )
1452 buf[ i ].Colour = Term->CurColour;
1455 VT_int_ScrollFramebuffer( Term, -Count );
1456 if( Term->Flags & VT_FLAG_ALTBUF )
1457 Term->AltWritePos = Term->TextWidth*scroll_top;
1459 Term->WritePos = Term->ViewPos;
1460 for( i = 0; i < Count; i ++ )
1462 VT_int_UpdateScreen( Term, 0 );
1463 if( Term->Flags & VT_FLAG_ALTBUF )
1464 Term->AltWritePos += Term->TextWidth;
1466 Term->WritePos += Term->TextWidth;
1470 if( Term->Flags & VT_FLAG_ALTBUF )
1471 Term->AltWritePos = init_write_pos;
1473 Term->WritePos = init_write_pos;
1477 * \fn void VT_int_ScrollFramebuffer( tVTerm *Term, int Count )
1478 * \note Scrolls the framebuffer down by \a Count text lines
1480 void VT_int_ScrollFramebuffer( tVTerm *Term, int Count )
1490 // Only update if this is the current terminal
1491 if( Term != gpVT_CurTerm ) return;
1493 if( Count > Term->ScrollHeight ) Count = Term->ScrollHeight;
1494 if( Count < -Term->ScrollHeight ) Count = -Term->ScrollHeight;
1496 // Switch to 2D Command Stream
1497 tmp = VIDEO_BUFFMT_2DSTREAM;
1498 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
1500 // BLIT to 0,0 from 0,giVT_CharHeight
1501 buf.Op = VIDEO_2DOP_BLIT;
1502 buf.SrcX = 0; buf.DstX = 0;
1503 // TODO: Don't assume character dimensions
1504 buf.W = Term->TextWidth * giVT_CharWidth;
1507 buf.SrcY = (Term->ScrollTop+Count) * giVT_CharHeight;
1508 buf.DstY = Term->ScrollTop * giVT_CharHeight;
1510 else // Scroll up, move text down
1513 buf.SrcY = Term->ScrollTop * giVT_CharHeight;
1514 buf.DstY = (Term->ScrollTop+Count) * giVT_CharHeight;
1516 buf.H = (Term->ScrollHeight-Count) * giVT_CharHeight;
1517 VFS_WriteAt(giVT_OutputDevHandle, 0, sizeof(buf), &buf);
1519 // Restore old mode (this function is only called during text mode)
1520 tmp = VIDEO_BUFFMT_TEXT;
1521 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
1525 * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
1526 * \brief Updates the video framebuffer
1528 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
1531 int view_pos, write_pos;
1532 // Only update if this is the current terminal
1533 if( Term != gpVT_CurTerm ) return;
1535 switch( Term->Mode )
1537 case TERM_MODE_TEXT:
1538 view_pos = (Term->Flags & VT_FLAG_ALTBUF) ? 0 : Term->ViewPos;
1539 write_pos = (Term->Flags & VT_FLAG_ALTBUF) ? Term->AltWritePos : Term->WritePos;
1540 buffer = (Term->Flags & VT_FLAG_ALTBUF) ? Term->AltBuf : Term->Text;
1541 // Re copy the entire screen?
1544 giVT_OutputDevHandle,
1546 Term->TextWidth*Term->TextHeight*sizeof(tVT_Char),
1550 // Only copy the current line
1552 int ofs = write_pos - write_pos % Term->TextWidth;
1554 giVT_OutputDevHandle,
1555 (ofs - view_pos)*sizeof(tVT_Char),
1556 Term->TextWidth*sizeof(tVT_Char),
1563 giVT_OutputDevHandle,
1565 Term->Width*Term->Height*sizeof(Uint32),
1573 * \brief Update the screen mode
1574 * \param Term Terminal to update
1575 * \param NewMode New mode to set
1576 * \param NewWidth New framebuffer width
1577 * \param NewHeight New framebuffer height
1579 void VT_int_ChangeMode(tVTerm *Term, int NewMode, int NewWidth, int NewHeight)
1581 // TODO: Increase RealWidth/RealHeight when this happens
1582 if(NewWidth > giVT_RealWidth) NewWidth = giVT_RealWidth;
1583 if(NewHeight > giVT_RealHeight) NewHeight = giVT_RealHeight;
1585 Term->Mode = NewMode;
1587 if(NewWidth != Term->Width || NewHeight != Term->Height)
1589 int oldW = Term->Width;
1590 int oldTW = Term->TextWidth;
1591 int oldH = Term->Height;
1592 int oldTH = Term->TextHeight;
1593 tVT_Char *oldTBuf = Term->Text;
1594 Uint32 *oldFB = Term->Buffer;
1596 // Calculate new dimensions
1597 Term->Width = NewWidth;
1598 Term->Height = NewHeight;
1599 Term->TextWidth = NewWidth / giVT_CharWidth;
1600 Term->TextHeight = NewHeight / giVT_CharHeight;
1601 Term->ScrollHeight = Term->TextHeight - (oldTH - Term->ScrollHeight) - Term->ScrollTop;
1603 // Allocate new buffers
1605 Term->Text = calloc(
1606 Term->TextWidth * Term->TextHeight * (giVT_Scrollback+1),
1611 w = (oldTW > Term->TextWidth) ? Term->TextWidth : oldTW;
1612 h = (oldTH > Term->TextHeight) ? Term->TextHeight : oldTH;
1613 h *= giVT_Scrollback + 1;
1614 for( i = 0; i < h; i ++ )
1617 &Term->Text[i*Term->TextWidth],
1626 Term->AltBuf = realloc(
1628 Term->TextWidth * Term->TextHeight * sizeof(tVT_Char)
1632 Term->Buffer = calloc( Term->Width * Term->Height, sizeof(Uint32) );
1635 w = (oldW > Term->Width) ? Term->Width : oldW;
1636 h = (oldH > Term->Height) ? Term->Height : oldH;
1637 for( i = 0; i < h; i ++ )
1640 &Term->Buffer[i*Term->Width],
1651 case TERM_MODE_TEXT:
1652 Log_Log("VTerm", "Set VT %p to text mode (%ix%i)",
1653 Term, Term->TextWidth, Term->TextHeight);
1656 Log_Log("VTerm", "Set VT %p to framebuffer mode (%ix%i)",
1657 Term, Term->Width, Term->Height);
1659 //case TERM_MODE_2DACCEL:
1660 //case TERM_MODE_3DACCEL:
1668 void VT_int_ToggleAltBuffer(tVTerm *Term, int Enabled)
1671 Term->Flags |= VT_FLAG_ALTBUF;
1673 Term->Flags &= ~VT_FLAG_ALTBUF;
1674 VT_int_UpdateScreen(Term, 1);
1680 #define MONOSPACE_FONT 10816
1682 #if MONOSPACE_FONT == 10808 // 8x8
1683 # include "vterm_font_8x8.h"
1684 #elif MONOSPACE_FONT == 10816 // 8x16
1685 # include "vterm_font_8x16.h"
1688 // === PROTOTYPES ===
1689 Uint8 *VT_Font_GetChar(Uint32 Codepoint);
1692 int giVT_CharWidth = FONT_WIDTH;
1693 int giVT_CharHeight = FONT_HEIGHT;
1697 * \brief Render a font character
1699 void VT_Font_Render(Uint32 Codepoint, void *Buffer, int Depth, int Pitch, Uint32 BGC, Uint32 FGC)
1707 Uint8 *buf = Buffer;
1709 font = VT_Font_GetChar(Codepoint);
1711 for(y = 0; y < FONT_HEIGHT; y ++)
1713 for(x = 0; x < FONT_WIDTH; x ++)
1715 if(*font & (1 << (FONT_WIDTH-x-1)))
1720 buf = (void*)( (tVAddr)buf + Pitch );
1725 else if( Depth <= 16 )
1727 Uint16 *buf = Buffer;
1729 font = VT_Font_GetChar(Codepoint);
1731 for(y = 0; y < FONT_HEIGHT; y ++)
1733 for(x = 0; x < FONT_WIDTH; x ++)
1735 if(*font & (1 << (FONT_WIDTH-x-1)))
1740 buf = (void*)( (tVAddr)buf + Pitch );
1745 // - Special handling to not overwrite the next pixel
1746 //TODO: Endian issues here
1747 else if( Depth == 24 )
1749 Uint8 *buf = Buffer;
1750 Uint8 bg_r = (BGC >> 16) & 0xFF;
1751 Uint8 bg_g = (BGC >> 8) & 0xFF;
1752 Uint8 bg_b = (BGC >> 0) & 0xFF;
1753 Uint8 fg_r = (FGC >> 16) & 0xFF;
1754 Uint8 fg_g = (FGC >> 8) & 0xFF;
1755 Uint8 fg_b = (FGC >> 0) & 0xFF;
1757 font = VT_Font_GetChar(Codepoint);
1759 for(y = 0; y < FONT_HEIGHT; y ++)
1761 for(x = 0; x < FONT_WIDTH; x ++)
1765 if(*font & (1 << (FONT_WIDTH-x-1))) {
1766 r = fg_r; g = fg_g; b = fg_b;
1769 r = bg_r; g = bg_g; b = bg_b;
1775 buf = (void*)( (tVAddr)buf + Pitch );
1779 // 32-bpp colour (nice and easy)
1780 else if( Depth == 32 )
1782 Uint32 *buf = Buffer;
1784 font = VT_Font_GetChar(Codepoint);
1786 for(y = 0; y < FONT_HEIGHT; y ++)
1788 for(x = 0; x < FONT_WIDTH; x ++)
1790 if(*font & (1 << (FONT_WIDTH-x-1)))
1795 buf = (Uint32*)( (tVAddr)buf + Pitch );
1802 * \fn Uint32 VT_Colour12to24(Uint16 Col12)
1803 * \brief Converts a 12-bit colour into 24 bits
1805 Uint32 VT_Colour12to24(Uint16 Col12)
1810 ret = (tmp << 0) | (tmp << 4);
1811 tmp = (Col12 & 0xF0) >> 4;
1812 ret |= (tmp << 8) | (tmp << 12);
1813 tmp = (Col12 & 0xF00) >> 8;
1814 ret |= (tmp << 16) | (tmp << 20);
1818 * \brief Converts a 12-bit colour into 15 bits
1820 Uint16 VT_Colour12to15(Uint16 Col12)
1825 ret = (tmp << 1) | (tmp & 1);
1826 tmp = (Col12 & 0xF0) >> 4;
1827 ret |= ( (tmp << 1) | (tmp & 1) ) << 5;
1828 tmp = (Col12 & 0xF00) >> 8;
1829 ret |= ( (tmp << 1) | (tmp & 1) ) << 10;
1834 * \brief Converts a 12-bit colour into any other depth
1835 * \param Col12 12-bit source colour
1836 * \param Depth Desired bit deptj
1837 * \note Green then blue get the extra avaliable bits (16:5-6-5, 14:4-5-5)
1839 Uint32 VT_Colour12toN(Uint16 Col12, int Depth)
1843 int rSize, gSize, bSize;
1846 if( Depth == 24 ) return VT_Colour12to24(Col12);
1847 if( Depth == 15 ) return VT_Colour12to15(Col12);
1848 // - 32 is a special case, it's usually 24-bit colour with an unused byte
1849 if( Depth == 32 ) return VT_Colour12to24(Col12);
1852 if( Depth < 8 ) return 0;
1853 if( Depth > 32 ) return 0;
1856 g = (Col12 & 0xF0) >> 4;
1857 b = (Col12 & 0xF00) >> 8;
1859 rSize = gSize = bSize = Depth / 3;
1860 if( rSize + gSize + bSize < Depth ) // Depth % 3 == 1
1862 if( rSize + gSize + bSize < Depth ) // Depth % 3 == 2
1866 r <<= rSize - 4; g <<= gSize - 4; b <<= bSize - 4;
1867 // Fill with the lowest bit
1868 if( Col12 & 0x001 ) r |= (1 << (rSize - 4)) - 1;
1869 if( Col12 & 0x010 ) r |= (1 << (gSize - 4)) - 1;
1870 if( Col12 & 0x100 ) r |= (1 << (bSize - 4)) - 1;
1875 ret |= b << (rSize + gSize);
1881 * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1882 * \brief Gets an index into the font array given a Unicode Codepoint
1883 * \note See http://en.wikipedia.org/wiki/CP437
1885 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
1889 return &VTermFont[Codepoint*FONT_HEIGHT];
1892 case 0xC7: index = 128; break; // Ç
1893 case 0xFC: index = 129; break; // ü
1894 case 0xE9: index = 130; break; // é
1895 case 0xE2: index = 131; break; // â
1896 case 0xE4: index = 132; break; // ä
1897 case 0xE0: index = 133; break; // à
1898 case 0xE5: index = 134; break; // å
1899 case 0xE7: index = 135; break; // ç
1900 case 0xEA: index = 136; break; // ê
1901 case 0xEB: index = 137; break; // ë
1902 case 0xE8: index = 138; break; // è
1903 case 0xEF: index = 139; break; // ï
1904 case 0xEE: index = 140; break; // î
1905 case 0xEC: index = 141; break; // ì
1906 case 0xC4: index = 142; break; // Ä
1907 case 0xC5: index = 143; break; // Å
1910 return &VTermFont[index*FONT_HEIGHT];
1913 EXPORTAS(&giVT_CharWidth, giVT_CharWidth);
1914 EXPORTAS(&giVT_CharHeight, giVT_CharHeight);
1915 EXPORT(VT_Font_Render);
1916 EXPORT(VT_Colour12to24);