VGA.h

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/*
 * Copyright (C) 2009 Niek Linnenbank
 *
 * This program 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.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __SERVER_VIDEO_VGA_H
#define __SERVER_VIDEO_VGA_H
 
#include <FreeNOS/System.h>
#include <DeviceServer.h>
#include <Types.h>
 
#define VGA_PADDR (0xb8000)
 
#define VGA_IOADDR 0x3d4
 
#define VGA_IODATA 0x3d5
 
#define VGA_ATTR(front,back) \
    (((back & 0xf) << 4) | ((front & 0xf)))
 
#define VGA_CHAR(ch,front,back) \
    ((VGA_ATTR(front,back) << 8) | (ch & 0xff))
 
enum Colors
{
    BLACK        = 0,
    BLUE         = 1,
    GREEN        = 2,
    CYAN         = 3,
    RED          = 4,
    MAGENTA      = 5,
    BROWN        = 6,
    LIGHTGREY    = 7,
    DARKGREY     = 8,
    LIGHTBLUE    = 9,
    LIGHTGREEN   = 10,
    LIGHTCYAN    = 11,
    LIGHTRED     = 12,
    LIGHTMAGENTA = 13,
    LIGHTBROWN   = 14,
    WHITE        = 15,
};
 
class VGA : public Device
{
    public:
 
    VGA(const u32 inode,
        const Size width = 80,
        const Size height = 25);
 
    virtual FileSystem::Result initialize();
 
    virtual FileSystem::Result read(IOBuffer & buffer,
                                    Size & size,
                                    const Size offset);
 
    virtual FileSystem::Result write(IOBuffer & buffer,
                                     Size & size,
                                     const Size offset);
 
  private:
 
    u16 *vga;
 
    Size width;
 
    Size height;
 
    Arch::IO m_io;
};
 
#endif /* __SERVER_VIDEO_VGA_H */