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misc: split libraries, closes #2496
author David Demelier <markand@malikania.fr>
date Thu, 15 Oct 2020 10:32:18 +0200
parents 7f1af54bb35a
children a43e79d489ea
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1 /*
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2 * trace_hud.c -- on screen hud
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <stdio.h>
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21 #include <string.h>
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22
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23 #include <core/font.h>
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24 #include <core/trace.h>
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25 #include <core/window.h>
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26
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27 #include <ui/label.h>
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28 #include <ui/theme.h>
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29
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30 #include "trace_hud.h"
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31
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32 #define LINES_MAX (4)
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33 #define THEME(t) ((t) ? (t) : theme_default())
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34
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35 static struct {
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36 char lines[LINES_MAX + 1][TRACE_LINE_MAX];
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37 unsigned int elapsed;
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38 } data;
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39
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40 struct trace_hud trace_hud = {
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41 .timeout = TRACE_HUD_TIMEOUT_DEFAULT
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42 };
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43
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44 void
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45 trace_hud_handler(const char *str)
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46 {
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47 assert(str);
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48
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49 /* 1.Try to find an empty line. */
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50 for (size_t i = 0; i < LINES_MAX; ++i) {
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51 if (data.lines[i][0] == '\0') {
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52 snprintf(data.lines[i], sizeof (data.lines[i]), "%s", str);
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53 return;
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54 }
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55 }
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56
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57 /* 2. All lines are full, put in last one and move other. */
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58 memmove(&data.lines[0], &data.lines[1], sizeof (data.lines[0]) * LINES_MAX - 1);
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59 snprintf(data.lines[LINES_MAX - 1], sizeof (data.lines[0]), "%s", str);
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60
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61 /* 3. Reset elapsed time now. */
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62 data.elapsed = 0;
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63 }
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64
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65 void
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66 trace_hud_update(unsigned int ticks)
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67 {
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68 data.elapsed += ticks;
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69
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70 /*
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71 * We have an empty line in the data.lines at LINES_MAX, so we simply so
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72 * to move the whole array.
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73 *
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74 * [0] = "abc"
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75 * [1] = "def"
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76 * [2] = "xyz"
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77 * [3] = "zef"
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78 * [n] = "ldkf"
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79 * [LINES_MAX + 1] = "\0"
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80 */
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81 if (data.elapsed >= trace_hud.timeout) {
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82 data.elapsed = 0;
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83 memmove(&data.lines[0], &data.lines[1], sizeof (data.lines[0]) * LINES_MAX);
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84 }
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85 }
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86
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87 void
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88 trace_hud_draw(void)
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89 {
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90 struct theme *th;
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91 int x, y;
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92
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93 th = THEME(trace_hud.theme);
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94 x = th->padding;
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95 y = th->padding;
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96
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97 for (int i = 0; i < LINES_MAX && data.lines[i][0]; ++i) {
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98 label_draw(&(struct label) {
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99 .x = x,
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100 .y = y,
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101 .text = data.lines[i],
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102 .theme = th,
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103 .align = LABEL_ALIGN_TOP_LEFT
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104 });
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105
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106 y += font_height(th->fonts[THEME_FONT_INTERFACE]);
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107 y += th->padding;
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108 }
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109 }
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110
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111 void
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112 trace_hud_clear(void)
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113 {
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114 memset(&data, 0, sizeof (data));
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115 }