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| Rev | Author | Line No. | Line |
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| 1487 | cejka | 1 | /* |
| 2 | * Copyright (C) 2006 Josef Cejka |
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| 3 | * All rights reserved. |
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| 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 | |||
| 29 | #include <screenbuffer.h> |
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| 30 | #include <malloc.h> |
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| 31 | #include <unistd.h> |
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| 32 | |||
| 1525 | cejka | 33 | /** Store one character to screenbuffer. Its position is determined by scr->position_x and scr->position_y. |
| 34 | * @param scr screenbuffer |
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| 35 | * @param c stored character |
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| 1487 | cejka | 36 | */ |
| 1525 | cejka | 37 | void screenbuffer_putchar(screenbuffer_t *scr, char c) |
| 1487 | cejka | 38 | { |
| 39 | keyfield_t *field; |
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| 40 | |||
| 41 | field = get_field_at(scr, scr->position_x, scr->position_y); |
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| 42 | |||
| 43 | field->character = c; |
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| 44 | field->style = scr->style; |
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| 45 | } |
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| 46 | |||
| 1525 | cejka | 47 | /** Initilize screenbuffer. Allocate space for screen content in accordance to given size. |
| 48 | * @param scr initialized screenbuffer |
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| 1526 | cejka | 49 | * @param size_x width in characters |
| 50 | * @param size_y height in characters |
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| 51 | * @return pointer to screenbuffer (same as scr parameter) or NULL |
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| 1525 | cejka | 52 | */ |
| 1487 | cejka | 53 | screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y) |
| 54 | { |
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| 55 | if ((scr->buffer = (keyfield_t *)malloc(sizeof(keyfield_t) * size_x * size_y)) == NULL) { |
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| 56 | return NULL; |
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| 57 | } |
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| 58 | |||
| 59 | scr->size_x = size_x; |
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| 60 | scr->size_y = size_y; |
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| 61 | scr->style.fg_color = DEFAULT_FOREGROUND_COLOR; |
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| 62 | scr->style.bg_color = DEFAULT_BACKGROUND_COLOR; |
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| 1497 | cejka | 63 | |
| 64 | screenbuffer_clear(scr); |
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| 65 | |||
| 1487 | cejka | 66 | return scr; |
| 67 | } |
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| 68 | |||
| 1526 | cejka | 69 | /** Clear screenbuffer. |
| 70 | * @param scr screenbuffer |
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| 71 | */ |
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| 1487 | cejka | 72 | void screenbuffer_clear(screenbuffer_t *scr) |
| 73 | { |
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| 74 | unsigned int i; |
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| 75 | |||
| 1497 | cejka | 76 | for (i = 0; i < (scr->size_x * scr->size_y); i++) { |
| 1487 | cejka | 77 | scr->buffer[i].character = ' '; |
| 78 | scr->buffer[i].style = scr->style; |
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| 79 | } |
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| 80 | |||
| 81 | scr->top_line = 0; |
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| 82 | scr->position_y = 0; |
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| 83 | scr->position_x = 0; |
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| 84 | } |
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| 85 | |||
| 1526 | cejka | 86 | /** Clear one buffer line. |
| 1487 | cejka | 87 | * @param scr |
| 88 | * @param line One buffer line (not a screen line!) |
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| 89 | */ |
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| 90 | void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line) |
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| 91 | { |
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| 92 | unsigned int i; |
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| 93 | |||
| 94 | for (i = 0; i < scr->size_x; i++) { |
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| 95 | scr->buffer[i + line*scr->size_x].character = ' '; |
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| 96 | scr->buffer[i + line*scr->size_x].style = scr->style; |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 1526 | cejka | 100 | /** Copy content buffer from screenbuffer to given memory. |
| 101 | * @param scr source screenbuffer |
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| 102 | * @param dest destination |
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| 103 | */ |
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| 1487 | cejka | 104 | void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest) |
| 105 | { |
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| 106 | unsigned int i; |
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| 107 | |||
| 108 | for (i = 0; i < scr->size_x * scr->size_y; i++) { |
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| 109 | dest[i] = scr->buffer[i]; |
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| 110 | } |
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| 111 | } |
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| 112 | |||
| 1526 | cejka | 113 | /** Set new cursor position in screenbuffer. |
| 114 | * @param scr |
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| 115 | * @param x |
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| 116 | * @param y |
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| 117 | */ |
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| 1487 | cejka | 118 | void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y) |
| 119 | { |
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| 120 | scr->position_x = x % scr->size_x; |
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| 1525 | cejka | 121 | scr->position_y = y % scr->size_y; |
| 1487 | cejka | 122 | } |
| 123 | |||
| 1526 | cejka | 124 | /** Set new style. |
| 125 | * @param scr |
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| 126 | * @param fg_color |
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| 127 | * @param bg_color |
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| 128 | */ |
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| 1525 | cejka | 129 | void screenbuffer_set_style(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color) |
| 130 | { |
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| 131 | scr->style.fg_color = fg_color; |
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| 132 | scr->style.bg_color = bg_color; |
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| 133 | } |
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| 134 |