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annotate examples/example-trace/example-trace.c @ 486:d6757c30658e

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core: rework errors
author David Demelier <markand@malikania.fr>
date Tue, 28 Feb 2023 13:04:13 +0100
parents 3ff1fe64d0cd
children 8d5a266a1774
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1 /*
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2 * example-trace.c -- example on how to use custom trace handlers
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3 *
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4 * Copyright (c) 2020-2023 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 <mlk/core/core.h>
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20 #include <mlk/core/err.h>
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21 #include <mlk/core/event.h>
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22 #include <mlk/core/game.h>
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23 #include <mlk/core/sys.h>
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24 #include <mlk/core/window.h>
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25 #include <mlk/core/painter.h>
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26 #include <mlk/core/panic.h>
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27 #include <mlk/core/state.h>
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28 #include <mlk/core/trace.h>
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29 #include <mlk/core/util.h>
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30
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31 #include <mlk/ui/theme.h>
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32 #include <mlk/ui/ui.h>
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33
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34 #include <mlk/example/example.h>
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35 #include <mlk/example/trace-hud.h>
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36
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37 static struct mlk_state *states[1];
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38
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39 static void
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40 init(void)
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41 {
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42 int err;
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43
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44 if ((err = mlk_example_init("example-trace")) < 0)
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45 mlk_panicf("mlk_example_init: %s", mlk_err_string(err));
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46
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47 mlk_trace_handler = trace_hud_handler;
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48 }
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49
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50 static void
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51 handle(struct mlk_state *st, const union mlk_event *ev)
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52 {
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53 (void)st;
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54
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55 switch (ev->type) {
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56 case MLK_EVENT_KEYDOWN:
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57 switch (ev->key.key) {
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58 case MLK_KEY_ESCAPE:
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59 trace_hud_clear();
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60 break;
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61 default:
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62 mlk_tracef("keydown pressed: %d", ev->key.key);
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63 break;
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64 }
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65 break;
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66 case MLK_EVENT_CLICKDOWN:
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67 mlk_tracef("click at %d,%d", ev->click.x, ev->click.y);
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68 break;
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69 case MLK_EVENT_QUIT:
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70 mlk_game_quit();
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71 break;
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72 default:
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73 break;
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74 }
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75 }
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77 static void
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78 update(struct mlk_state *st, unsigned int ticks)
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79 {
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80 (void)st;
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81
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82 trace_hud_update(ticks);
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83 }
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84
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85 static void
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86 draw(struct mlk_state *st)
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87 {
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88 (void)st;
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89
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90 mlk_painter_set_color(0x4f8fbaff);
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91 mlk_painter_clear();
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92 trace_hud_draw();
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93 mlk_painter_present();
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94 }
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95
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96 static void
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97 run(void)
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98 {
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99 struct mlk_state state = {
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100 .handle = handle,
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101 .update = update,
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102 .draw = draw
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103 };
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104
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105 mlk_game_init(states, MLK_UTIL_SIZE(states));
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106 mlk_game_push(&state);
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107 mlk_game_loop();
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108 }
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109
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110 static void
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111 quit(void)
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112 {
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113 mlk_window_finish();
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114 ui_finish();
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115 mlk_core_finish();
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116 }
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117
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118 int
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119 main(int argc, char **argv)
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120 {
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121 (void)argc;
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122 (void)argv;
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123
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124 init();
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125 run();
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126 quit();
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127 }
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128