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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 | |||
| 33 | /** Get field from buffer that corresponds to character at position x,y at screen |
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| 34 | * |
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| 35 | */ |
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| 36 | |||
| 37 | int screenbuffer_putchar(screenbuffer_t *scr, char c) |
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| 38 | { |
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| 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 | |||
| 46 | scr->position_x++; |
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| 47 | if (scr->position_x == scr->size_x) { |
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| 48 | scr->position_x = 0; |
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| 49 | scr->position_y++; |
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| 50 | if (scr->position_y == scr->size_y) { |
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| 51 | /* scroll */ |
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| 52 | scr->position_y--; |
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| 53 | screenbuffer_clear_line(scr, scr->top_line++); |
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| 54 | } |
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| 55 | } |
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| 56 | |||
| 57 | return 1; |
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| 58 | } |
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| 59 | |||
| 60 | screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y) |
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| 61 | { |
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| 62 | if ((scr->buffer = (keyfield_t *)malloc(sizeof(keyfield_t) * size_x * size_y)) == NULL) { |
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| 63 | return NULL; |
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| 64 | } |
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| 65 | |||
| 66 | scr->size_x = size_x; |
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| 67 | scr->size_y = size_y; |
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| 68 | scr->position_y = 0; |
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| 69 | scr->position_x = 0; |
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| 70 | scr->style.fg_color = DEFAULT_FOREGROUND_COLOR; |
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| 71 | scr->style.bg_color = DEFAULT_BACKGROUND_COLOR; |
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| 72 | scr->top_line = 0; |
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| 73 | return scr; |
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| 74 | } |
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| 75 | |||
| 76 | void screenbuffer_clear(screenbuffer_t *scr) |
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| 77 | { |
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| 78 | unsigned int i; |
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| 79 | |||
| 80 | for (i = 0; i < scr->size_x * scr->size_y; i++) { |
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| 81 | scr->buffer[i].character = ' '; |
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| 82 | scr->buffer[i].style = scr->style; |
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| 83 | } |
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| 84 | |||
| 85 | scr->top_line = 0; |
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| 86 | scr->position_y = 0; |
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| 87 | scr->position_x = 0; |
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| 88 | } |
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| 89 | |||
| 90 | /** Clear one buffer line |
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| 91 | * @param scr |
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| 92 | * @param line One buffer line (not a screen line!) |
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| 93 | */ |
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| 94 | void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line) |
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| 95 | { |
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| 96 | unsigned int i; |
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| 97 | |||
| 98 | for (i = 0; i < scr->size_x; i++) { |
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| 99 | scr->buffer[i + line*scr->size_x].character = ' '; |
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| 100 | scr->buffer[i + line*scr->size_x].style = scr->style; |
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| 101 | } |
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| 102 | } |
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| 103 | |||
| 104 | void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest) |
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| 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 | |||
| 113 | void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y) |
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| 114 | { |
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| 115 | scr->position_x = x % scr->size_x; |
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| 116 | scr->position_y = (y + scr->top_line) % scr->size_y; |
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| 117 | } |
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| 118 |