70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/*
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* Copyright (c) 2012, 2013, 2014, 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* vgatextbuffer.h
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* An indexable text buffer with the VGA text mode framebuffer as backend.
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*/
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#ifndef SORTIX_VGATEXTBUFFER_H
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#define SORTIX_VGATEXTBUFFER_H
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#include <sortix/kernel/textbuffer.h>
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namespace Sortix {
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class VGATextBuffer : public TextBuffer
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{
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public:
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VGATextBuffer(uint16_t* vga, TextChar* chars, size_t width, size_t height);
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virtual ~VGATextBuffer();
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virtual size_t Width();
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virtual size_t Height();
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virtual TextChar GetChar(TextPos pos);
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virtual void SetChar(TextPos pos, TextChar c);
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virtual void Scroll(ssize_t off, TextChar fillwith);
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virtual void Move(TextPos to, TextPos from, size_t numchars);
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virtual void Fill(TextPos from, TextPos to, TextChar fillwith);
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virtual bool GetCursorEnabled();
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virtual void SetCursorEnabled(bool enablecursor);
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virtual TextPos GetCursorPos();
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virtual void SetCursorPos(TextPos cursorpos);
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virtual void SpawnThreads();
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virtual void Invalidate();
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virtual bool EmergencyIsImpaired();
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virtual bool EmergencyRecoup();
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virtual void EmergencyReset();
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virtual void Resume();
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virtual void Pause();
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private:
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bool UsablePosition(TextPos pos) const;
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TextPos CropPosition(TextPos pos) const;
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size_t OffsetOfPos(TextPos pos) const;
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void UpdateCursor();
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private:
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uint16_t* vga;
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TextChar* chars;
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size_t width;
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size_t height;
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TextPos cursorpos;
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bool cursorenabled;
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};
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} // namespace Sortix
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#endif
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