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annotate examples/example-font.c @ 193:78774cc2cc6b

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doc: minimal typo
author David Demelier <markand@malikania.fr>
date Sat, 07 Nov 2020 19:26:51 +0100
parents 6992085d47fd
children 133926e08d6e
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1 /*
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2 * example-font.c -- show how to use fonts
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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 <core/clock.h>
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20 #include <core/core.h>
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21 #include <core/event.h>
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22 #include <core/font.h>
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23 #include <core/painter.h>
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24 #include <core/panic.h>
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25 #include <core/sys.h>
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26 #include <core/texture.h>
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27 #include <core/util.h>
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28 #include <core/window.h>
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29
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30 #include <ui/theme.h>
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31 #include <ui/ui.h>
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32
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33 #define W (1280)
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34 #define H (720)
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35
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36 /* Friendly taken from: https://lospec.com/palette-list/apollo */
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37 static const unsigned long colors[] = {
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38 0x3c5e8bff, /* Blue. */
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39 0x468232ff, /* Green. */
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40 0xad7757ff, /* Light brown. */
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41 0x884b2bff, /* Brown. */
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42 0x752438ff, /* Red. */
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43 0x7a367bff, /* Magenta. */
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44 0x151d28ff, /* Dark */
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45 0xc7cfccff, /* Christian Grey. */
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46 };
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47
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48 static void
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49 init(void)
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50 {
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51 if (!core_init() || !ui_init())
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52 panic();
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53 if (!window_open("Example - Font", W, H))
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54 panic();
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55 }
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56
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57 static void
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58 run(void)
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59 {
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60 struct clock clock = {0};
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61 struct font *font = theme_default()->fonts[THEME_FONT_INTERFACE];
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62 int ci = 0;
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63 enum font_style style = font->style;
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64
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65 clock_start(&clock);
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66
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67 for (;;) {
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68 struct texture tex;
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69 union event ev;
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70 unsigned int elapsed = clock_elapsed(&clock);
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71
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72 clock_start(&clock);
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73
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74 while (event_poll(&ev)) {
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75 switch (ev.type) {
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76 case EVENT_KEYDOWN:
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77 switch (ev.key.key) {
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78 case KEY_LEFT:
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79 if (ci > 0)
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80 ci--;
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81 break;
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82 case KEY_RIGHT:
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83 if ((size_t)ci < NELEM(colors))
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84 ci++;
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85 break;
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86 case KEY_SPACE:
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87 if (style == FONT_STYLE_ANTIALIASED)
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88 style = FONT_STYLE_NONE;
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89 else
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90 style = FONT_STYLE_ANTIALIASED;
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91 default:
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92 break;
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93 }
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94 break;
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95 case EVENT_QUIT:
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96 return;
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97 default:
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98 break;
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99 }
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100 }
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101
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102 painter_set_color(0xffffffff);
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103 painter_clear();
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104
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105 font->style = style;
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106
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107 if (!font_render(font, &tex, "Example of text. Use <Left>/<Right> to change color and <Space> to toggle antialiasing.", colors[ci]))
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108 panic();
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109
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110 texture_draw(&tex, 10, 10);
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111 painter_present();
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112 texture_finish(&tex);
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113
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114 if ((elapsed = clock_elapsed(&clock)) < 20)
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115 delay(20 - elapsed);
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116 }
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117 }
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118
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119 static void
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120 quit(void)
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121 {
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122 window_finish();
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123 ui_finish();
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124 core_finish();
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125 }
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126
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127 int
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128 main(int argc, char **argv)
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129 {
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130 (void)argc;
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131 (void)argv;
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132
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133 init();
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134 run();
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135 quit();
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136
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137 return 0;
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138 }