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sortix--sortix/kernel/vgatextbuffer.h

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The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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/*******************************************************************************
Recover kernel log during emergencies.
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Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
This file is part of Sortix.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
vgatextbuffer.h
An indexable text buffer with the VGA text mode framebuffer as backend.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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*******************************************************************************/
#ifndef SORTIX_VGATEXTBUFFER_H
#define SORTIX_VGATEXTBUFFER_H
#include <sortix/kernel/textbuffer.h>
namespace Sortix {
class VGATextBuffer : public TextBuffer
{
public:
VGATextBuffer(uint16_t* vga, uint16_t* attr, size_t width, size_t height);
virtual ~VGATextBuffer();
virtual size_t Width() const;
virtual size_t Height() const;
virtual TextChar GetChar(TextPos pos) const;
virtual void SetChar(TextPos pos, TextChar c);
virtual uint16_t GetCharAttr(TextPos pos) const ;
virtual void SetCharAttr(TextPos pos, uint16_t attrval);
virtual void Scroll(ssize_t off, TextChar fillwith);
virtual void Move(TextPos to, TextPos from, size_t numchars);
virtual void Fill(TextPos from, TextPos to, TextChar fillwith,
uint16_t fillattr);
virtual bool GetCursorEnabled() const;
virtual void SetCursorEnabled(bool enablecursor);
virtual TextPos GetCursorPos() const;
virtual void SetCursorPos(TextPos cursorpos);
Recover kernel log during emergencies.
2013-11-11 16:21:56 -05:00
virtual bool EmergencyIsImpaired();
virtual bool EmergencyRecoup();
virtual void EmergencyReset();
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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private:
bool UsablePosition(TextPos pos) const;
TextPos CropPosition(TextPos pos) const;
size_t OffsetOfPos(TextPos pos) const;
void UpdateCursor();
private:
uint16_t* vga;
uint16_t* attr;
size_t width;
size_t height;
TextPos cursorpos;
bool cursorenabled;
};
} // namespace Sortix
#endif
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