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75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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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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vga.h
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A Video Graphics Array driver.
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*******************************************************************************/
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#ifndef SORTIX_VGA_H
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#define SORTIX_VGA_H
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#include "device.h"
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#include "stream.h"
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namespace Sortix {
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const size_t VGA_FONT_WIDTH = 8UL;
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const size_t VGA_FONT_HEIGHT = 16UL;
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const size_t VGA_FONT_NUMCHARS = 256UL;
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const size_t VGA_FONT_CHARSIZE = VGA_FONT_WIDTH * VGA_FONT_HEIGHT / 8UL;
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namespace VGA {
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void Init();
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void SetCursor(unsigned x, unsigned y);
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const uint8_t* GetFont();
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} // namespace VGA
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// TODO: This class shouldn't be exposed publicly; it is used in a hack in the
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// /dev filesystem. However, vga.cpp should register /dev/vga instead.
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class DevVGA : public DevBuffer
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{
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public:
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typedef DevBuffer BaseClass;
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public:
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DevVGA();
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virtual ~DevVGA();
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private:
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size_t offset;
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public:
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virtual ssize_t Read(uint8_t* dest, size_t count);
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virtual ssize_t Write(const uint8_t* src, size_t count);
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virtual bool IsReadable();
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virtual bool IsWritable();
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virtual size_t BlockSize();
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virtual uintmax_t Size();
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virtual uintmax_t Position();
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virtual bool Seek(uintmax_t position);
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virtual bool Resize(uintmax_t size);
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};
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} // namespace Sortix
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#endif
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