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/*

 * Copyright (c) 2006 Josef Cejka

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/** @addtogroup console

 * @{

 */

/** @file

 */

#include <screenbuffer.h>

#include <console/style.h>

#include <malloc.h>

#include <unistd.h>

/** Store one character to screenbuffer.

 *

 * Its position is determined by scr->position_x

 * and scr->position_y.

 *

 * @param scr Screenbuffer

 * @param c   Stored character

 *

 */

void screenbuffer_putchar(screenbuffer_t *scr, wchar_t ch)

{

    keyfield_t *field =

        get_field_at(scr, scr->position_x, scr->position_y);

    field->character = ch;

    field->attrs = scr->attrs;

}

/** Initilize screenbuffer.

 *

 * Allocate space for screen content in accordance to given size.

 *

 * @param scr    Initialized screenbuffer

 * @param size_x Width in characters

 * @param size_y Height in characters

 *

 * @return Pointer to screenbuffer (same as scr parameter) or NULL

 *

 */

screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y)

{

    scr->buffer = (keyfield_t *) malloc(sizeof(keyfield_t) * size_x * size_y);

    if (!scr->buffer)

        return NULL;

    scr->size_x = size_x;

    scr->size_y = size_y;

    scr->attrs.t = at_style;

    scr->attrs.a.s.style = STYLE_NORMAL;

    scr->is_cursor_visible = 1;

    screenbuffer_clear(scr);

    return scr;

}

/** Clear screenbuffer.

 *

 * @param scr Screenbuffer

 *

 */

void screenbuffer_clear(screenbuffer_t *scr)

{

    unsigned int i;

    for (i = 0; i < (scr->size_x * scr->size_y); i++) {

        scr->buffer[i].character = ' ';

        scr->buffer[i].attrs = scr->attrs;

    }

    scr->top_line = 0;

    scr->position_y = 0;

    scr->position_x = 0;

}

/** Clear one buffer line.

 *

 * @param scr

 * @param line One buffer line (not a screen line!)

 *

 */

void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line)

{

    unsigned int i;

    for (i = 0; i < scr->size_x; i++) {

        scr->buffer[i + line * scr->size_x].character = ' ';

        scr->buffer[i + line * scr->size_x].attrs = scr->attrs;

    }

}

/** Copy content buffer from screenbuffer to given memory.

 *

 * @param scr  Source screenbuffer

 * @param dest Destination

 *

 */

void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest)

{

    unsigned int i;

    for (i = 0; i < scr->size_x * scr->size_y; i++)

        dest[i] = scr->buffer[i];

}

/** Set new cursor position in screenbuffer.

 *

 * @param scr

 * @param x

 * @param y

 *

 */

void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y)

{

    scr->position_x = x % scr->size_x;

    scr->position_y = y % scr->size_y;

}

/** Set new style.

 *

 * @param scr

 * @param fg_color

 * @param bg_color

 *

 */

void screenbuffer_set_style(screenbuffer_t *scr, int style)

{

    scr->attrs.t = at_style;

    scr->attrs.a.s.style = style;

}

/** Set new color.

 *

 * @param scr

 * @param fg_color

 * @param bg_color

 *

 */

void screenbuffer_set_color(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color, unsigned int flags)

{

    scr->attrs.t = at_idx;

    scr->attrs.a.i.fg_color = fg_color;

    scr->attrs.a.i.bg_color = bg_color;

    scr->attrs.a.i.flags = flags;

}

/** Set new RGB color.

 *

 * @param scr

 * @param fg_color

 * @param bg_color

 *

 */

void screenbuffer_set_rgb_color(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color)

{

    scr->attrs.t = at_rgb;

    scr->attrs.a.r.fg_color = fg_color;

    scr->attrs.a.r.bg_color = bg_color;

}

/** @}

 */