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annotate libmlk-adventure/adventure/trace_hud.c @ 278:cc676046aac9

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core: add sprite_scale function
author David Demelier <markand@malikania.fr>
date Tue, 15 Dec 2020 22:06:32 +0100
parents 8d41e317c07b
children 196264679079
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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/action.h>
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24 #include <core/font.h>
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25 #include <core/trace.h>
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26 #include <core/window.h>
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27
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28 #include <ui/label.h>
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29 #include <ui/theme.h>
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30
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31 #include "trace_hud.h"
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32
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33 #define LINES_MAX (4)
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34 #define THEME(t) ((t) ? (t) : theme_default())
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35
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36 static struct {
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37 char lines[LINES_MAX + 1][TRACE_LINE_MAX];
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38 unsigned int elapsed;
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39 } data;
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40
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41 struct trace_hud trace_hud = {
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42 .timeout = TRACE_HUD_TIMEOUT_DEFAULT
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43 };
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44
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45 void
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46 trace_hud_handler(const char *str)
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47 {
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48 assert(str);
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49
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50 /* 1.Try to find an empty line. */
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51 for (size_t i = 0; i < LINES_MAX; ++i) {
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52 if (data.lines[i][0] == '\0') {
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53 snprintf(data.lines[i], sizeof (data.lines[i]), "%s", str);
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54 return;
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55 }
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56 }
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57
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58 /* 2. All lines are full, put in last one and move other. */
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59 memmove(&data.lines[0], &data.lines[1], sizeof (data.lines[0]) * LINES_MAX - 1);
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60 snprintf(data.lines[LINES_MAX - 1], sizeof (data.lines[0]), "%s", str);
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61
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62 /* 3. Reset elapsed time now. */
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63 data.elapsed = 0;
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64 }
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65
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66 void
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67 trace_hud_update(unsigned int ticks)
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68 {
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69 data.elapsed += ticks;
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70
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71 /*
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72 * We have an empty line in the data.lines at LINES_MAX, so we simply so
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73 * to move the whole array.
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74 *
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75 * [0] = "abc"
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76 * [1] = "def"
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77 * [2] = "xyz"
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78 * [3] = "zef"
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79 * [n] = "ldkf"
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80 * [LINES_MAX + 1] = "\0"
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81 */
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82 if (data.elapsed >= trace_hud.timeout) {
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83 data.elapsed = 0;
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84 memmove(&data.lines[0], &data.lines[1], sizeof (data.lines[0]) * LINES_MAX);
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85 }
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86 }
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87
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88 void
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89 trace_hud_draw(void)
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90 {
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91 struct theme *th;
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92 int x, y;
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93
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94 th = THEME(trace_hud.theme);
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95 x = th->padding;
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96 y = th->padding;
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97
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98 for (int i = 0; i < LINES_MAX && data.lines[i][0]; ++i) {
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99 label_draw(&(struct label) {
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100 .x = x,
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101 .y = y,
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102 .text = data.lines[i],
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103 .theme = th,
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104 .flags = LABEL_FLAGS_SHADOW
141
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105 });
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106
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107 y += font_height(th->fonts[THEME_FONT_INTERFACE]);
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108 y += th->padding;
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109 }
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110 }
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111
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112 void
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113 trace_hud_clear(void)
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114 {
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115 memset(&data, 0, sizeof (data));
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116 }
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117
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118 static bool
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119 update(struct action *a, unsigned int ticks)
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120 {
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121 (void)a;
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122
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123 trace_hud_update(ticks);
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124
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125 return false;
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126 }
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127
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128 static void
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129 draw(struct action *a)
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130 {
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131 (void)a;
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132
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133 trace_hud_draw();
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134 }
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135
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136 struct action *
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137 trace_hud_action(void)
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138 {
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139 static struct action a = {
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140 .update = update,
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141 .draw = draw
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David Demelier <markand@malikania.fr>
parents: 243
diff changeset
142 };
8d41e317c07b adventure: enable trace_hud
David Demelier <markand@malikania.fr>
parents: 243
diff changeset
143
8d41e317c07b adventure: enable trace_hud
David Demelier <markand@malikania.fr>
parents: 243
diff changeset
144 return &a;
8d41e317c07b adventure: enable trace_hud
David Demelier <markand@malikania.fr>
parents: 243
diff changeset
145 }