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| Rev | Author | Line No. | Line |
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| 1487 | cejka | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Josef Cejka |
| 1487 | cejka | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1649 | cejka | 29 | /** @addtogroup console |
| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1487 | cejka | 35 | #ifndef __SCREENBUFFER_H__ |
| 36 | #define __SCREENBUFFER_H__ |
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| 37 | |||
| 38 | |||
| 1630 | palkovsky | 39 | #define DEFAULT_FOREGROUND 0x0 /**< default console foreground color */ |
| 40 | #define DEFAULT_BACKGROUND 0xf0f0f0 /**< default console background color */ |
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| 1487 | cejka | 41 | |
| 42 | typedef struct { |
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| 43 | unsigned int bg_color; /**< background color */ |
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| 44 | unsigned int fg_color; /**< foreground color */ |
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| 45 | } style_t; |
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| 46 | |||
| 1525 | cejka | 47 | /** One field on screen. It contain one character and its attributes. */ |
| 1487 | cejka | 48 | typedef struct { |
| 49 | char character; /**< Character itself */ |
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| 50 | style_t style; /**< Character`s attributes */ |
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| 51 | } keyfield_t; |
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| 52 | |||
| 53 | /** Structure for buffering state of one virtual console. |
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| 54 | */ |
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| 55 | typedef struct { |
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| 56 | keyfield_t *buffer; /**< Screen content - characters and its style. Used as cyclyc buffer. */ |
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| 57 | unsigned int size_x, size_y; /**< Number of columns and rows */ |
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| 58 | unsigned int position_x, position_y; /**< Coordinates of last printed character for determining cursor position */ |
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| 59 | style_t style; /**< Current style */ |
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| 60 | unsigned int top_line; /**< Points to buffer[][] line that will be printed at screen as the first line */ |
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| 1575 | cejka | 61 | unsigned char is_cursor_visible; /**< Cursor state - default is visible */ |
| 1487 | cejka | 62 | } screenbuffer_t; |
| 63 | |||
| 1525 | cejka | 64 | /** Returns keyfield for position on screen. Screenbuffer->buffer is cyclic buffer so we must couted in index of the topmost line. |
| 65 | * @param scr screenbuffer |
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| 1649 | cejka | 66 | * @param x position on screen |
| 1525 | cejka | 67 | * @param y position on screen |
| 68 | * @return keyfield structure with character and its attributes on x,y |
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| 69 | */ |
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| 1487 | cejka | 70 | static inline keyfield_t *get_field_at(screenbuffer_t *scr, unsigned int x, unsigned int y) |
| 71 | { |
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| 72 | return scr->buffer + x + ((y + scr->top_line) % scr->size_y) * scr->size_x; |
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| 73 | } |
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| 74 | |||
| 1525 | cejka | 75 | /** Compares two styles. |
| 76 | * @param s1 first style |
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| 77 | * @param s2 second style |
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| 78 | * @return nonzero on equality |
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| 79 | */ |
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| 1509 | palkovsky | 80 | static inline int style_same(style_t s1, style_t s2) |
| 81 | { |
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| 82 | return s1.fg_color == s2.fg_color && s1.bg_color == s2.bg_color; |
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| 83 | } |
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| 1487 | cejka | 84 | |
| 1509 | palkovsky | 85 | |
| 1525 | cejka | 86 | void screenbuffer_putchar(screenbuffer_t *scr, char c); |
| 1487 | cejka | 87 | screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y); |
| 88 | |||
| 89 | void screenbuffer_clear(screenbuffer_t *scr); |
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| 90 | void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line); |
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| 91 | void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest); |
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| 92 | void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y); |
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| 1525 | cejka | 93 | void screenbuffer_set_style(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color); |
| 1487 | cejka | 94 | |
| 95 | #endif |
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| 96 | |||
| 1649 | cejka | 97 | |
| 98 | /** @} |
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| 99 | */ |
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| 100 |