76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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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, uint16_t* attr, size_t width, size_t height);
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virtual ~VGATextBuffer();
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virtual size_t Width() const;
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virtual size_t Height() const;
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virtual TextChar GetChar(TextPos pos) const;
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virtual void SetChar(TextPos pos, TextChar c);
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virtual uint16_t GetCharAttr(TextPos pos) const ;
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virtual void SetCharAttr(TextPos pos, uint16_t attrval);
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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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uint16_t fillattr);
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virtual bool GetCursorEnabled() const;
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virtual void SetCursorEnabled(bool enablecursor);
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virtual TextPos GetCursorPos() const;
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virtual void SetCursorPos(TextPos cursorpos);
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virtual void SpawnThreads();
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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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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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uint16_t* attr;
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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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