| 0,0 → 1,72 |
|---|
| /* |
| * 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. |
| */ |
| |
| #ifndef __SCREENBUFFER_H__ |
| #define __SCREENBUFFER_H__ |
| |
| |
| #define DEFAULT_FOREGROUND_COLOR 0xffffff |
| #define DEFAULT_BACKGROUND_COLOR 0x00003f |
| |
| typedef struct { |
| unsigned int bg_color; /**< background color */ |
| unsigned int fg_color; /**< foreground color */ |
| } style_t; |
| |
| /** One field at screen. It contain one character and its attributes. */ |
| typedef struct { |
| char character; /**< Character itself */ |
| style_t style; /**< Character`s attributes */ |
| } keyfield_t; |
| |
| /** Structure for buffering state of one virtual console. |
| */ |
| typedef struct { |
| keyfield_t *buffer; /**< Screen content - characters and its style. Used as cyclyc buffer. */ |
| unsigned int size_x, size_y; /**< Number of columns and rows */ |
| unsigned int position_x, position_y; /**< Coordinates of last printed character for determining cursor position */ |
| style_t style; /**< Current style */ |
| unsigned int top_line; /**< Points to buffer[][] line that will be printed at screen as the first line */ |
| } screenbuffer_t; |
| |
| static inline keyfield_t *get_field_at(screenbuffer_t *scr, unsigned int x, unsigned int y) |
| { |
| return scr->buffer + x + ((y + scr->top_line) % scr->size_y) * scr->size_x; |
| } |
| |
| |
| int screenbuffer_putchar(screenbuffer_t *scr, char c); |
| screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y); |
| |
| void screenbuffer_clear(screenbuffer_t *scr); |
| void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line); |
| void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest); |
| void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y); |
| |
| #endif |
| |