con_console.hpp

#if !defined(__CON_CONSOLE_HPP__)
#define __CON_CONSOLE_HPP__

//
// L4 includes
//
#include <l4/l4con/l4con_pslim.h>

//
// local includes
//
#include "core/common.hpp"

struct con_console : private noncopyable
{
    //
    // types
    //
    typedef l4con_pslim_color_t color_t;
    typedef l4con_pslim_rect_t rect_t;
    static_assert(is_unsigned<color_t>::conforms, "color_t must be an unsigned integer");

    //
    // constants
    //
    enum default_margin_constants
    {
        DEFAULT_HORIZONTAL_MARGIN = 5,
        DEFAULT_VERTICAL_MARGIN = 5
    };

    enum color_constants
    {
        DEFAULT_FGCOLOR = 0xffffff,
        DEFAULT_BGCOLOR = 0x000000
    };

    static const color_t colors[][2];

  protected:
    const rect_t margins;
    rect_t screen;

    l4_threadid_t vc_id;
    uint8_t  mode;
    uint32_t bits_per_pixel, bytes_per_pixel, bytes_per_line,
             flags, font_width, font_height;

    inline con_console(const rect_t &margins=((rect_t){x: 0, y: 0, w: 0, h: 0}))
        : margins(margins), screen(((rect_t){x: 0, y: 0, w: 0, h: 0})), vc_id(L4_INVALID_ID)
    {
        open_console();
    }

    inline ~con_console(void)
    {
        close_console();
    }

    int open_console(void);
    int close_console(void);

    inline bool is_open(void) const
    {
        return !l4_is_invalid_id(vc_id);
    }

    int fill(color_t fill_color=DEFAULT_BGCOLOR, uint32_t x=0, uint32_t y=0, uint32_t w=0, uint32_t h=0) const;
    int vscroll(color_t fill_color=DEFAULT_BGCOLOR, int delta=-1) const;

    inline int clear(color_t fill_color=DEFAULT_BGCOLOR) const
    {
        return fill(fill_color, screen.x, screen.y, screen.w, screen.h);
    }

  protected:
    static l4_threadid_t get_con_id(void);
};

#endif

// ***** end of source ***** //