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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Josef Cejka |
2 | * Copyright (C) 2006 Josef Cejka |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <screenbuffer.h> |
29 | #include <screenbuffer.h> |
30 | #include <malloc.h> |
30 | #include <malloc.h> |
31 | #include <unistd.h> |
31 | #include <unistd.h> |
32 | 32 | ||
33 | /** Get field from buffer that corresponds to character at position x,y at screen |
33 | /** Get field from buffer that corresponds to character at position x,y at screen |
34 | * |
34 | * |
35 | */ |
35 | */ |
36 | 36 | ||
37 | int screenbuffer_putchar(screenbuffer_t *scr, char c) |
37 | int screenbuffer_putchar(screenbuffer_t *scr, char c) |
38 | { |
38 | { |
39 | keyfield_t *field; |
39 | keyfield_t *field; |
40 | 40 | ||
41 | field = get_field_at(scr, scr->position_x, scr->position_y); |
41 | field = get_field_at(scr, scr->position_x, scr->position_y); |
42 | 42 | ||
43 | field->character = c; |
43 | field->character = c; |
44 | field->style = scr->style; |
44 | field->style = scr->style; |
45 | 45 | ||
46 | scr->position_x++; |
- | |
47 | if (scr->position_x == scr->size_x) { |
- | |
48 | scr->position_x = 0; |
- | |
49 | scr->position_y++; |
- | |
50 | if (scr->position_y == scr->size_y) { |
- | |
51 | /* scroll */ |
- | |
52 | scr->position_y--; |
- | |
53 | screenbuffer_clear_line(scr, scr->top_line++); |
- | |
54 | } |
- | |
55 | } |
- | |
56 | - | ||
57 | return 1; |
46 | return 1; |
58 | } |
47 | } |
59 | 48 | ||
60 | screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y) |
49 | screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y) |
61 | { |
50 | { |
62 | if ((scr->buffer = (keyfield_t *)malloc(sizeof(keyfield_t) * size_x * size_y)) == NULL) { |
51 | if ((scr->buffer = (keyfield_t *)malloc(sizeof(keyfield_t) * size_x * size_y)) == NULL) { |
63 | return NULL; |
52 | return NULL; |
64 | } |
53 | } |
65 | 54 | ||
66 | scr->size_x = size_x; |
55 | scr->size_x = size_x; |
67 | scr->size_y = size_y; |
56 | scr->size_y = size_y; |
68 | scr->position_y = 0; |
- | |
69 | scr->position_x = 0; |
- | |
70 | scr->style.fg_color = DEFAULT_FOREGROUND_COLOR; |
57 | scr->style.fg_color = DEFAULT_FOREGROUND_COLOR; |
71 | scr->style.bg_color = DEFAULT_BACKGROUND_COLOR; |
58 | scr->style.bg_color = DEFAULT_BACKGROUND_COLOR; |
- | 59 | ||
72 | scr->top_line = 0; |
60 | screenbuffer_clear(scr); |
- | 61 | ||
73 | return scr; |
62 | return scr; |
74 | } |
63 | } |
75 | 64 | ||
76 | void screenbuffer_clear(screenbuffer_t *scr) |
65 | void screenbuffer_clear(screenbuffer_t *scr) |
77 | { |
66 | { |
78 | unsigned int i; |
67 | unsigned int i; |
79 | 68 | ||
80 | for (i = 0; i < scr->size_x * scr->size_y; i++) { |
69 | for (i = 0; i < (scr->size_x * scr->size_y); i++) { |
81 | scr->buffer[i].character = ' '; |
70 | scr->buffer[i].character = ' '; |
82 | scr->buffer[i].style = scr->style; |
71 | scr->buffer[i].style = scr->style; |
83 | } |
72 | } |
84 | 73 | ||
85 | scr->top_line = 0; |
74 | scr->top_line = 0; |
86 | scr->position_y = 0; |
75 | scr->position_y = 0; |
87 | scr->position_x = 0; |
76 | scr->position_x = 0; |
88 | } |
77 | } |
89 | 78 | ||
90 | /** Clear one buffer line |
79 | /** Clear one buffer line |
91 | * @param scr |
80 | * @param scr |
92 | * @param line One buffer line (not a screen line!) |
81 | * @param line One buffer line (not a screen line!) |
93 | */ |
82 | */ |
94 | void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line) |
83 | void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line) |
95 | { |
84 | { |
96 | unsigned int i; |
85 | unsigned int i; |
97 | 86 | ||
98 | for (i = 0; i < scr->size_x; i++) { |
87 | for (i = 0; i < scr->size_x; i++) { |
99 | scr->buffer[i + line*scr->size_x].character = ' '; |
88 | scr->buffer[i + line*scr->size_x].character = ' '; |
100 | scr->buffer[i + line*scr->size_x].style = scr->style; |
89 | scr->buffer[i + line*scr->size_x].style = scr->style; |
101 | } |
90 | } |
102 | } |
91 | } |
103 | 92 | ||
104 | void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest) |
93 | void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest) |
105 | { |
94 | { |
106 | unsigned int i; |
95 | unsigned int i; |
107 | 96 | ||
108 | for (i = 0; i < scr->size_x * scr->size_y; i++) { |
97 | for (i = 0; i < scr->size_x * scr->size_y; i++) { |
109 | dest[i] = scr->buffer[i]; |
98 | dest[i] = scr->buffer[i]; |
110 | } |
99 | } |
111 | } |
100 | } |
112 | 101 | ||
113 | void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y) |
102 | void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y) |
114 | { |
103 | { |
115 | scr->position_x = x % scr->size_x; |
104 | scr->position_x = x % scr->size_x; |
116 | scr->position_y = (y + scr->top_line) % scr->size_y; |
105 | scr->position_y = y % scr->size_y; |
117 | } |
106 | } |
118 | 107 | ||
119 | 108 |