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Add unicode support to kernel terminal and console.

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This commit is contained in:
Jonas 'Sortie' Termansen 2014-04-19 20:28:54 +02:00
parent f41964fcab
commit dc11b9f837
9 changed files with 312 additions and 77 deletions
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15
kernel/include/sortix/kernel/textbuffer.h
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014.
This file is part of Sortix.
@ -27,6 +27,7 @@
#include <sys/types.h>
#include <stddef.h>
#include <stdint.h>
#include <sortix/kernel/kthread.h>
@ -42,11 +43,19 @@ struct TextPos
size_t y;
};
struct TextCharPOD
{
wchar_t c;
uint8_t vgacolor; // Format of <sortix/vga.h>
};
struct TextChar
{
TextChar() { }
TextChar(char c, uint8_t vgacolor) : c(c), vgacolor(vgacolor) { }
char c;
TextChar(const TextCharPOD& o) : c(o.c), vgacolor(o.vgacolor) { }
TextChar(wchar_t c, uint8_t vgacolor) : c(c), vgacolor(vgacolor) { }
operator TextCharPOD() { return TextCharPOD{c, vgacolor}; }
wchar_t c;
uint8_t vgacolor; // Format of <sortix/vga.h>
};

4
kernel/kernel.cpp
View file

@ -209,7 +209,9 @@ extern "C" void KernelInit(unsigned long magic, multiboot_info_t* bootinfo)
const size_t VGA_WIDTH = 80;
const size_t VGA_HEIGHT = 25;
static uint16_t vga_attr_buffer[VGA_WIDTH*VGA_HEIGHT];
VGATextBuffer textbuf(VGAFB, vga_attr_buffer, VGA_WIDTH, VGA_HEIGHT);
static struct TextCharPOD vga_chars_pod_buffer[VGA_WIDTH*VGA_HEIGHT];
TextChar* vga_chars_buffer = (TextChar*) vga_chars_pod_buffer;
VGATextBuffer textbuf(VGAFB, vga_chars_buffer, vga_attr_buffer, VGA_WIDTH, VGA_HEIGHT);
TextBufferHandle textbufhandlestack(NULL, false, &textbuf, false);
textbufhandle = Ref<TextBufferHandle>(&textbufhandlestack);

48
kernel/lfbtextbuffer.cpp
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014.
This file is part of Sortix.
@ -62,7 +62,7 @@ LFBTextBuffer* CreateLFBTextBuffer(uint8_t* lfb, uint32_t lfbformat,
size_t fontsize = VGA_FONT_CHARSIZE * VGA_FONT_NUMCHARS;
uint8_t* backbuf;
uint8_t* font;
uint16_t* chars;
TextChar* chars;
uint16_t* attrs;
TextBufferCmd* queue;
LFBTextBuffer* ret;
@ -73,7 +73,7 @@ LFBTextBuffer* CreateLFBTextBuffer(uint8_t* lfb, uint32_t lfbformat,
goto cleanup_done;
if ( !(font = new uint8_t[fontsize]) )
goto cleanup_backbuf;
if ( !(chars = new uint16_t[columns * rows]) )
if ( !(chars = new TextChar[columns * rows]) )
goto cleanup_font;
if ( !(attrs = new uint16_t[columns * rows]) )
goto cleanup_chars;
@ -106,9 +106,9 @@ LFBTextBuffer* CreateLFBTextBuffer(uint8_t* lfb, uint32_t lfbformat,
ret->columns = columns;
ret->rows = rows;
ret->font = font;
memset(chars, 0, sizeof(uint16_t) * columns * rows);
memset(chars, 0, sizeof(chars[0]) * columns * rows);
ret->chars = chars;
memset(attrs, 0, sizeof(uint16_t) * columns * rows);
memset(attrs, 0, sizeof(attrs[0]) * columns * rows);
ret->attrs = attrs;
for ( size_t i = 0; i < 16UL; i++ )
{
@ -147,21 +147,6 @@ cleanup_done:
return NULL;
}
// TODO: Those are also in vgatextbuffer.cpp. Move them to a shared location and
// give them better names.
static TextChar EntryToTextChar(uint16_t entry)
{
char c = entry & 0x00FF;
uint8_t vgacolor = entry >> 8U;
return TextChar{c, vgacolor};
}
static uint16_t CharToTextEntry(TextChar c)
{
unsigned char uc = c.c;
return (uint16_t) uc | (uint16_t) c.vgacolor << 8U;
}
LFBTextBuffer::LFBTextBuffer()
{
}
@ -216,7 +201,7 @@ TextPos LFBTextBuffer::AddToPosition(TextPos pos, size_t count)
return CropPosition(ret);
}
void LFBTextBuffer::RenderChar(uint16_t vgachar, size_t posx, size_t posy)
void LFBTextBuffer::RenderChar(TextChar textchar, size_t posx, size_t posy)
{
if ( columns <= posx || rows <= posy )
return;
@ -224,15 +209,15 @@ void LFBTextBuffer::RenderChar(uint16_t vgachar, size_t posx, size_t posy)
if ( lfbformat != 32 || VGA_FONT_WIDTH != 8UL )
return;
bool drawcursor = cursorenabled && posx == cursorpos.x && posy == cursorpos.y;
uint8_t c = vgachar >> 0 & 0xFF;
uint8_t fgcoloridx = vgachar >> 8 & 0x0F;
uint8_t bgcoloridx = vgachar >> 12 & 0x0F;
uint8_t fgcoloridx = textchar.vgacolor >> 0 & 0x0F;
uint8_t bgcoloridx = textchar.vgacolor >> 4 & 0x0F;
uint32_t fgcolor = colors[fgcoloridx];
uint32_t bgcolor = colors[bgcoloridx];
const uint8_t* charfont = VGA::GetCharacterFont(font, textchar.c);
for ( size_t y = 0; y < VGA_FONT_HEIGHT; y++ )
{
size_t pixely = posy * VGA_FONT_HEIGHT + y;
uint8_t linebitmap = font[c * VGA_FONT_CHARSIZE + y];
uint8_t linebitmap = charfont[y];
for ( size_t x = 0; x < VGA_FONT_WIDTH+1; x++ )
{
uint32_t* line = (uint32_t*) (lfb + pixely * scansize);
@ -354,7 +339,7 @@ TextChar LFBTextBuffer::GetChar(TextPos pos) const
if ( UsablePosition(pos) )
{
((LFBTextBuffer*) this)->StopRendering();
TextChar ret = EntryToTextChar(chars[pos.y * columns + pos.x]);
TextChar ret = chars[pos.y * columns + pos.x];
((LFBTextBuffer*) this)->ResumeRendering();
return ret;
}
@ -365,12 +350,11 @@ void LFBTextBuffer::SetChar(TextPos pos, TextChar c)
{
if ( !UsablePosition(pos) )
return;
uint16_t entry = CharToTextEntry(c);
TextBufferCmd cmd;
cmd.type = TEXTBUFCMD_CHAR;
cmd.x = pos.x;
cmd.y = pos.y;
cmd.c = entry;
cmd.c = c;
IssueCommand(&cmd);
}
@ -443,7 +427,7 @@ void LFBTextBuffer::Scroll(ssize_t off, TextChar fillwith)
TextBufferCmd cmd;
cmd.type = TEXTBUFCMD_SCROLL;
cmd.scroll_offset = off;
cmd.c = CharToTextEntry(fillwith);
cmd.c = fillwith;
IssueCommand(&cmd);
}
@ -472,12 +456,12 @@ void LFBTextBuffer::Fill(TextPos from, TextPos to, TextChar fillwith,
cmd.from_y = from.y;
cmd.to_x = to.x;
cmd.to_y = to.y;
cmd.c = CharToTextEntry(fillwith);
cmd.c = fillwith;
cmd.attr = fillattr;
IssueCommand(&cmd);
}
void LFBTextBuffer::DoScroll(ssize_t off, uint16_t entry)
void LFBTextBuffer::DoScroll(ssize_t off, TextChar entry)
{
bool neg = 0 < off;
size_t absoff = off < 0 ? -off : off;
@ -506,7 +490,7 @@ void LFBTextBuffer::DoMove(TextPos to, TextPos from, size_t numchars)
attrs[dest + numchars-1 - i] = attrs[src + numchars-1 - i];
}
void LFBTextBuffer::DoFill(TextPos from, TextPos to, uint16_t fillwith,
void LFBTextBuffer::DoFill(TextPos from, TextPos to, TextChar fillwith,
uint16_t fillattr)
{
size_t start = OffsetOfPos(from);

12
kernel/lfbtextbuffer.h
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014.
This file is part of Sortix.
@ -54,7 +54,7 @@ struct TextBufferCmd
union
{
bool b;
struct { uint16_t c; uint16_t attr; };
struct { TextCharPOD c; uint16_t attr; };
size_t val;
};
};
@ -91,7 +91,7 @@ public:
virtual void RenderThread();
private:
void RenderChar(uint16_t vgachar, size_t posx, size_t posy);
void RenderChar(TextChar textchar, size_t posx, size_t posy);
void RenderCharAt(TextPos pos);
void RenderRegion(size_t c1, size_t r1, size_t c2, size_t r2);
void RenderRange(TextPos from, TextPos to);
@ -99,9 +99,9 @@ private:
size_t OffsetOfPos(TextPos pos) const;
TextPos CropPosition(TextPos pos) const;
TextPos AddToPosition(TextPos pos, size_t count);
void DoScroll(ssize_t off, uint16_t entry);
void DoScroll(ssize_t off, TextChar entry);
void DoMove(TextPos to, TextPos from, size_t numchars);
void DoFill(TextPos from, TextPos to, uint16_t fillwith, uint16_t fillattr);
void DoFill(TextPos from, TextPos to, TextChar fillwith, uint16_t fillattr);
void IssueCommand(TextBufferCmd* cmd);
void StopRendering();
void ResumeRendering();
@ -131,7 +131,7 @@ private:
uint8_t* lfb;
uint8_t* backbuf;
uint8_t* font;
uint16_t* chars;
TextChar* chars;
uint16_t* attrs;
size_t columns;
size_t rows;

54
kernel/textterminal.cpp
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
This file is part of Sortix.
@ -22,6 +22,10 @@
*******************************************************************************/
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include <sortix/vga.h>
#include <sortix/kernel/kernel.h>
@ -37,6 +41,7 @@ const uint16_t ATTR_CHAR = 1U << 0U;
TextTerminal::TextTerminal(Ref<TextBufferHandle> textbufhandle)
{
memset(&ps, 0, sizeof(ps));
this->textbufhandle = textbufhandle;
this->termlock = KTHREAD_MUTEX_INITIALIZER;
Reset();
@ -233,24 +238,39 @@ bool TextTerminal::EmergencySync()
void TextTerminal::PutChar(TextBuffer* textbuf, char c)
{
if ( ansimode )
PutAnsiEscaped(textbuf, c);
else switch ( c )
return PutAnsiEscaped(textbuf, c);
if ( mbsinit(&ps) )
{
case '\n': Newline(textbuf); break;
case '\r': column = 0; break;
case '\b': Backspace(textbuf); break;
case '\t': Tab(textbuf); break;
case '\e': AnsiReset(); break;
default:
{
if ( textbuf->Width() <= column )
Newline(textbuf);
TextPos pos(column++, line);
TextChar tc(c, vgacolor);
textbuf->SetChar(pos, tc);
textbuf->SetCharAttr(pos, ATTR_CHAR);
} break;
switch ( c )
{
case '\n': Newline(textbuf); return;
case '\r': column = 0; return;
case '\b': Backspace(textbuf); return;
case '\t': Tab(textbuf); return;
case '\e': AnsiReset(); return;
default: break;
}
}
wchar_t wc;
size_t result = mbrtowc(&wc, &c, 1, &ps);
if ( result == (size_t) -2 )
return;
if ( result == (size_t) -1 )
{
memset(&ps, 0, sizeof(ps));
wc = L'<EFBFBD>';
}
if ( result == (size_t) 0 )
wc = L' ';
if ( textbuf->Width() <= column )
Newline(textbuf);
TextPos pos(column++, line);
TextChar tc(wc, vgacolor);
textbuf->SetChar(pos, tc);
textbuf->SetCharAttr(pos, ATTR_CHAR);
}
void TextTerminal::UpdateCursor(TextBuffer* textbuf)

5
kernel/textterminal.h
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
This file is part of Sortix.
@ -25,6 +25,8 @@
#ifndef SORTIX_TEXTTERMINAL_H
#define SORTIX_TEXTTERMINAL_H
#include <wchar.h>
#include <sortix/kernel/kthread.h>
#include <sortix/kernel/refcount.h>
@ -63,6 +65,7 @@ private:
void Reset();
private:
mbstate_t ps;
mutable Ref<TextBufferHandle> textbufhandle;
mutable kthread_mutex_t termlock;
uint8_t vgacolor;

218
kernel/vga.h
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
This file is part of Sortix.
@ -25,6 +25,8 @@
#ifndef SORTIX_VGA_H
#define SORTIX_VGA_H
#include <stddef.h>
#include <sortix/kernel/refcount.h>
namespace Sortix {
@ -38,6 +40,220 @@ const size_t VGA_FONT_CHARSIZE = VGA_FONT_WIDTH * VGA_FONT_HEIGHT / 8UL;
namespace VGA {
// https://en.wikipedia.org/wiki/Code_page_437
__attribute__((unused))
static inline int MapWideToVGAFont(wchar_t c)
{
if ( 32 <= c && c < 127 )
return (int) c;
switch ( c )
{
case L'☺': return 1;
case L'☻': return 2;
case L'♥': return 3;
case L'♦': return 4;
case L'♣': return 5;
case L'♠': return 6;
case L'•': return 7;
case L'◘': return 8;
case L'○': return 9;
case L'◙': return 10;
case L'♂': return 11;
case L'♀': return 12;
case L'♪': return 13;
case L'♬': return 14;
case L'☼': return 15;
case L'►': return 16;
case L'◄': return 17;
case L'↕': return 18;
case L'‼': return 19;
case L'': return 20;
case L'§': return 21;
case L'▬': return 22;
case L'↨': return 23;
case L'↑': return 24;
case L'↓': return 25;
case L'→': return 26;
case L'←': return 27;
case L'∟': return 28;
case L'↔': return 29;
case L'▲': return 30;
case L'▼': return 31;
case L'⌂': return 127;
case L'Ç': return 128;
case L'ü': return 129;
case L'é': return 130;
case L'â': return 131;
case L'ä': return 132;
case L'à': return 133;
case L'å': return 134;
case L'ç': return 135;
case L'ê': return 136;
case L'ë': return 137;
case L'è': return 138;
case L'ï': return 139;
case L'î': return 140;
case L'ì': return 141;
case L'Ä': return 142;
case L'Å': return 143;
case L'É': return 144;
case L'æ': return 145;
case L'Æ': return 146;
case L'ô': return 147;
case L'ö': return 148;
case L'ò': return 149;
case L'û': return 150;
case L'ù': return 151;
case L'ÿ': return 152;
case L'Ö': return 153;
case L'Ü': return 154;
case L'¢': return 155;
case L'£': return 156;
case L'¥': return 157;
case L'₧': return 158;
case L'ƒ': return 159;
case L'á': return 160;
case L'í': return 161;
case L'ó': return 162;
case L'ú': return 163;
case L'ñ': return 164;
case L'Ñ': return 165;
case L'ª': return 166;
case L'º': return 167;
case L'¿': return 168;
case L'⌐': return 169;
case L'¬': return 170;
case L'½': return 171;
case L'¼': return 172;
case L'¡': return 173;
case L'«': return 174;
case L'»': return 175;
case L'░': return 176;
case L'▒': return 177;
case L'▓': return 178;
case L'│': return 179;
case L'┤': return 180;
case L'╡': return 181;
case L'╢': return 182;
case L'╖': return 183;
case L'╕': return 184;
case L'╣': return 185;
case L'║': return 186;
case L'╗': return 187;
case L'╝': return 188;
case L'╜': return 189;
case L'╛': return 190;
case L'┐': return 191;
case L'└': return 192;
case L'┴': return 193;
case L'┬': return 194;
case L'├': return 195;
case L'─': return 196;
case L'┼': return 197;
case L'╞': return 198;
case L'╟': return 199;
case L'╚': return 200;
case L'╔': return 201;
case L'╩': return 202;
case L'╦': return 203;
case L'╠': return 204;
case L'═': return 205;
case L'╬': return 206;
case L'╧': return 207;
case L'╨': return 208;
case L'╤': return 209;
case L'╥': return 210;
case L'╙': return 211;
case L'╘': return 212;
case L'╒': return 213;
case L'╓': return 214;
case L'╫': return 215;
case L'╪': return 216;
case L'┘': return 217;
case L'┌': return 218;
case L'█': return 219;
case L'▄': return 220;
case L'▌': return 221;
case L'▐': return 222;
case L'▀': return 223;
case L'α': return 224;
case L'ß': return 225; /* German sharp S U+00DF */
case L'β': return 225; /* Greek lowercase beta U+03B2 */
case L'Γ': return 226;
case L'π': return 227;
case L'Σ': return 228; /* Greek uppercase sigma U+03A3 */
case L'∑': return 228; /* n-ary summation sign U+2211 (replacement) */
case L'σ': return 229;
case L'µ': return 230;
case L'τ': return 231;
case L'Φ': return 232;
case L'Θ': return 233;
case L'Ω': return 234;
case L'δ': return 235; /* Greek lowercase delta U+03B4 */
case L'ð': return 235; /* Icelandic lowercase eth U+00F0 (replacement) */
case L'∂': return 235; /* Partial derivative sign U+2202 (replacement) */
case L'∞': return 236;
case L'φ': return 237; /* Greek lowercase phi U+03C6 */
case L'∅': return 237; /* Empty set sign U+2205 (replacement) */
case L'ϕ': return 237; /* Greek phi symbol in italics U+03D5 (replacement) */
case L'⌀': return 237; /* Diameter sign U+2300 (replacement) */
case L'ø': return 237; /* Latin lowercase O with stroke U+00F8 (replacement) */
case L'Ø': return 237; /* Latin uppercase O with stroke U+00D8 (replacement) */
case L'ε': return 238; /* Greek lowercase epsilon U+03B5 */
case L'∈': return 238; /* Element-of sign U+2208 */
case L'€': return 238; /* Euro sign U+20AC */
case L'∩': return 239;
case L'≡': return 240;
case L'±': return 241;
case L'≥': return 242;
case L'≤': return 243;
case L'⌠': return 244;
case L'⌡': return 245;
case L'÷': return 246;
case L'≈': return 247;
case L'°': return 248;
case L'∙': return 249;
case L'·': return 250;
case L'√': return 251;
case L'ⁿ': return 252;
case L'²': return 253;
case L'■': return 254;
default: return 0 <= c && c < 256 ? c : -1;
}
}
__attribute__((unused))
static const uint8_t font_replacement_character[16] =
{
0b00000000,
0b00010000,
0b00111000,
0b01000100,
0b10111010,
0b10111010,
0b11110110,
0b11101110,
0b11101110,
0b11111110,
0b01101100,
0b00101000,
0b00010000,
0b00000000,
0b00000000,
0b00000000,
};
__attribute__((unused))
static inline const uint8_t* GetCharacterFont(const uint8_t* font, wchar_t wc)
{
if ( wc == L'<EFBFBD>' )
return font_replacement_character;
int remap = MapWideToVGAFont(wc);
if ( remap < 0 )
return font_replacement_character;
return font + 16 * remap;
}
void Init(const char* devpath, Ref<Descriptor> slashdev);
void SetCursor(unsigned x, unsigned y);
const uint8_t* GetFont();

28
kernel/vgatextbuffer.cpp
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014.
This file is part of Sortix.
@ -34,10 +34,11 @@
namespace Sortix {
VGATextBuffer::VGATextBuffer(uint16_t* vga, uint16_t* attr,
VGATextBuffer::VGATextBuffer(uint16_t* vga, TextChar* chars, uint16_t* attr,
size_t width, size_t height)
{
this->vga = vga;
this->chars = chars;
this->attr = attr;
this->width = width;
this->height = height;
@ -50,17 +51,12 @@ VGATextBuffer::~VGATextBuffer()
{
}
static TextChar EntryToTextChar(uint16_t entry)
{
char c = entry & 0x00FF;
uint8_t vgacolor = entry >> 8U;
return TextChar{c, vgacolor};
}
static uint16_t CharToTextEntry(TextChar c)
{
unsigned char uc = c.c;
return (uint16_t) uc | (uint16_t) c.vgacolor << 8U;
int remap = VGA::MapWideToVGAFont(c.c);
if ( remap < 0 )
return (uint16_t) '?' | (uint16_t) COLOR8_RED << 8U;
return (uint16_t) remap | (uint16_t) c.vgacolor << 8U;
}
bool VGATextBuffer::UsablePosition(TextPos pos) const
@ -95,13 +91,14 @@ size_t VGATextBuffer::Height() const
TextChar VGATextBuffer::GetChar(TextPos pos) const
{
if ( UsablePosition(pos) )
return EntryToTextChar(vga[OffsetOfPos(pos)]);
return chars[OffsetOfPos(pos)];
return {0, 0};
}
void VGATextBuffer::SetChar(TextPos pos, TextChar c)
{
if ( UsablePosition(pos) )
chars[OffsetOfPos(pos)] = c,
vga[OffsetOfPos(pos)] = CharToTextEntry(c);
}
@ -141,11 +138,13 @@ void VGATextBuffer::Move(TextPos to, TextPos from, size_t numchars)
size_t src = OffsetOfPos(CropPosition(from));
if ( dest < src )
for ( size_t i = 0; i < numchars; i++ )
vga[dest + i] = vga[src + i],
chars[dest + i] = chars[src + i],
vga[dest + i] = CharToTextEntry(chars[dest + i]),
attr[dest + i] = attr[src + i];
else if ( src < dest )
for ( size_t i = 0; i < numchars; i++ )
vga[dest + numchars-1 - i] = vga[src + numchars-1 - i],
chars[dest + numchars-1 - i] = chars[src + numchars-1 - i],
vga[dest + numchars-1 - i] = CharToTextEntry(chars[dest + numchars-1 - i]),
attr[dest + numchars-1 - i] = attr[src + numchars-1 - i];
}
@ -158,6 +157,7 @@ void VGATextBuffer::Fill(TextPos from, TextPos to, TextChar fillwith,
size_t end = OffsetOfPos(to);
size_t entry = CharToTextEntry(fillwith);
for ( size_t i = start; i <= end; i++ )
chars[i] = fillwith,
vga[i] = entry,
attr[i] = fillattr;
}

5
kernel/vgatextbuffer.h
View file

@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014.
This file is part of Sortix.
@ -32,7 +32,7 @@ namespace Sortix {
class VGATextBuffer : public TextBuffer
{
public:
VGATextBuffer(uint16_t* vga, uint16_t* attr, size_t width, size_t height);
VGATextBuffer(uint16_t* vga, TextChar* chars, uint16_t* attr, size_t width, size_t height);
virtual ~VGATextBuffer();
virtual size_t Width() const;
virtual size_t Height() const;
@ -60,6 +60,7 @@ private:
private:
uint16_t* vga;
TextChar* chars;
uint16_t* attr;
size_t width;
size_t height;