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annotate libmlk-rpg/mlk/rpg/battle-indicator.c @ 564:e91f37da2992

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core: doxygenize window
author David Demelier <markand@malikania.fr>
date Wed, 08 Mar 2023 20:09:21 +0100
parents 6100c643dba0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * battle-indicator.c -- drawable for rendering a hp/mp count usage
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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 <assert.h>
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20 #include <math.h>
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21 #include <stdio.h>
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22 #include <string.h>
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23
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24 #include <mlk/core/color.h>
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25 #include <mlk/core/font.h>
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26 #include <mlk/core/panic.h>
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27
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28 #include "battle-indicator.h"
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29
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30 #define STEP (2)
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31 #define DELAY (5)
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32
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33 static inline unsigned int
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34 inc(int cmp, int tgt)
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35 {
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36 return tgt > cmp ? fmin(cmp + STEP, tgt) : fmax(cmp - STEP, tgt);
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37 }
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38
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39 static inline int
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40 colored(const struct battle_indicator *bti)
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41 {
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42 /* Only check r, g, b and ignore alpha. */
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43 return MLK_COLOR_R(bti->cur) == MLK_COLOR_R(bti->color) &&
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44 MLK_COLOR_G(bti->cur) == MLK_COLOR_G(bti->color) &&
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45 MLK_COLOR_B(bti->cur) == MLK_COLOR_B(bti->color);
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46 }
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47
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48 void
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49 battle_indicator_start(struct battle_indicator *bti)
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50 {
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51 assert(bti);
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52
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53 char buf[128];
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54 int err;
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55
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56 snprintf(buf, sizeof (buf), "%u", bti->amount);
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57
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58 bti->cur = 0xffffffff;
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59 bti->elapsed = 0;
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60 bti->alpha = 250;
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61
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62 #if 0
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63 if ((err = mlk_font_render(theme->fonts[MLK_THEME_FONT_INTERFACE], &bti->tex[0], buf, bti->cur)) < 0 ||
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64 (err = mlk_font_render(theme->fonts[MLK_THEME_FONT_INTERFACE], &bti->tex[1], buf, 0x000000ff)) < 0)
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65 mlk_panic(err);
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66 #endif
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67 }
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69 int
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70 battle_indicator_completed(const struct battle_indicator *bti)
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71 {
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72 assert(battle_indicator_ok(bti));
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73
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74 return colored(bti) && bti->alpha == 0;
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75 }
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76
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77 int
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78 battle_indicator_ok(const struct battle_indicator *bti)
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79 {
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80 return bti && mlk_texture_ok(&bti->tex[0]) && mlk_texture_ok(&bti->tex[1]);
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81 }
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82
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83 int
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84 battle_indicator_update(struct battle_indicator *bti, unsigned int ticks)
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85 {
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86 assert(battle_indicator_ok(bti));
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87
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88 bti->elapsed += ticks;
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89
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90 if (bti->elapsed > DELAY) {
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91 bti->elapsed = 0;
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92
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93 if (!colored(bti)) {
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94 /* Update colors first. */
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95 bti->cur = MLK_COLOR_HEX(
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96 inc(MLK_COLOR_R(bti->cur), MLK_COLOR_R(bti->color)),
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97 inc(MLK_COLOR_G(bti->cur), MLK_COLOR_G(bti->color)),
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98 inc(MLK_COLOR_B(bti->cur), MLK_COLOR_B(bti->color)),
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99 255
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100 );
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101
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102 mlk_texture_set_color_mod(&bti->tex[0], bti->cur);
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103 } else {
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104 /* Update alpha next. */
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105 bti->alpha -= 10;
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106
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107 mlk_texture_set_alpha_mod(&bti->tex[0], bti->alpha);
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108 mlk_texture_set_alpha_mod(&bti->tex[1], bti->alpha);
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109 }
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110 }
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111
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112 return battle_indicator_completed(bti);
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113 }
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114
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115 void
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116 battle_indicator_draw(const struct battle_indicator *bti, int x, int y)
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117 {
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118 assert(battle_indicator_ok(bti));
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119
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120 mlk_texture_draw(&bti->tex[1], x + 1, y + 1);
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121 mlk_texture_draw(&bti->tex[0], x, y);
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122 }
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123
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124 void
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125 battle_indicator_finish(struct battle_indicator *bti)
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126 {
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127 assert(bti);
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128
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129 mlk_texture_finish(&bti->tex[0]);
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130 mlk_texture_finish(&bti->tex[1]);
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131
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132 memset(bti, 0, sizeof (*bti));
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133 }