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annotate libadventure/adventure/state/panic.c @ 162:629f55f3961e

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core: rework states
author David Demelier <markand@malikania.fr>
date Sun, 18 Oct 2020 12:01:59 +0200
parents libadventure/adventure/panic_state.c@c577c15df07f
children 6992085d47fd
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1 /*
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2 * panic_state.c -- panic state
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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 <stdlib.h>
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22 #include <stdnoreturn.h>
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23 #include <string.h>
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24
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25 #include <core/error.h>
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26 #include <core/event.h>
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27 #include <core/font.h>
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28 #include <core/game.h>
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29 #include <core/painter.h>
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30 #include <core/panic.h>
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31 #include <core/state.h>
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32 #include <core/sys.h>
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33 #include <core/texture.h>
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34 #include <core/util.h>
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35 #include <core/window.h>
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36
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37 #include <ui/align.h>
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38 #include <ui/theme.h>
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39
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40 #include <rpg/map_state.h>
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41
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42 #include "panic.h"
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43
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44 #define BACKGROUND 0x4f5070ff
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45 #define FOREGROUND 0xffffffff
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46
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47 #define OUT "molko-adventure.txt"
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48
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49 struct view {
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50 struct {
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51 struct texture tex;
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52 int x;
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53 int y;
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54 } texts[4];
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55 };
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56
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57 static noreturn void
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58 die(const char *fmt, ...)
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59 {
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60 assert(fmt);
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61
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62 va_list ap;
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63
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64 va_start(ap, fmt);
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65 fprintf(stderr, "abort: ");
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66 vfprintf(stderr, fmt, ap);
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67 va_end(ap);
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68 abort();
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69 exit(1);
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70 }
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71
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72 static noreturn void
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73 stop(void)
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74 {
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75 die("%s", error());
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76 }
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77
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78 static void
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79 dump(void)
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80 {
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81 FILE *fp;
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82
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83 if ((fp = fopen(OUT, "w"))) {
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84 /* TODO: add more info here. */
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85 fprintf(fp, "Molko's Adventure crash dump report\n");
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86 fclose(fp);
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87 }
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88
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89 abort();
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90 }
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91
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92 static struct view *
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93 init(void)
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94 {
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95 struct theme *theme;
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96 struct view *view;
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97 struct font font;
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98
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99 theme = theme_default();
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100 view = ecalloc(1, sizeof (*view));
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101
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102 /* Generate the texts. */
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103 font_shallow(&font, theme->fonts[THEME_FONT_INTERFACE]);
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104 font.style = FONT_STYLE_ANTIALIASED,
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105 font.color = FOREGROUND;
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106
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107 if (!font_render(&font, &view->texts[0].tex, "An unrecoverable error occured and the game cannot continue.") ||
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108 !font_render(&font, &view->texts[1].tex, "Please report the detailed error as provided below.") ||
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109 !font_render(&font, &view->texts[2].tex, "Press <s> to save information and generate a core dump.") ||
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110 !font_render(&font, &view->texts[3].tex, "Press <q> to quit without saving information."))
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111 die("%s", error());
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112
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113 /* All align x the same. */
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114 for (size_t i = 0; i < NELEM(view->texts); ++i)
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115 view->texts[i].x = theme->padding;
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116
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117 /* Header (0-1). */
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118 view->texts[0].y = theme->padding;
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119 view->texts[1].y = view->texts[0].y + view->texts[0].tex.h + theme->padding;
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120
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121 /* Footer. (2-3). */
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122 view->texts[3].y = window.h - view->texts[2].tex.h - theme->padding;
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123 view->texts[2].y = view->texts[3].y - view->texts[3].tex.h - theme->padding;
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124
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125 return view;
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126 }
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127
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128 static void
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129 handle_keydown(const struct event_key *ev)
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130 {
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131 assert(ev);
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132
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133 switch (ev->key) {
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134 case KEY_q:
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135 game_quit();
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136 break;
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137 case KEY_s:
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138 dump();
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139 break;
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140 default:
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141 break;
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142 }
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143 }
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144
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145 static void
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146 start(struct state *state)
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147 {
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148 (void)state;
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149
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150 /* We remove the panic handler to avoid infinite recursion. */
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151 panic_handler = stop;
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152 }
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153
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154 static void
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155 handle(struct state *state, const union event *ev)
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156 {
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157 assert(ev);
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158
162
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159 (void)state;
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160
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161 switch (ev->type) {
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162 case EVENT_KEYDOWN:
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163 handle_keydown(&ev->key);
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164 break;
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165 default:
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166 break;
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167 }
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168 }
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169
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170 static void
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171 draw(struct state *state)
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172 {
162
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173 struct theme *theme = theme_default();
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174 struct view *view = state->data;
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175 struct texture tex;
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176 struct font font;
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177 int x, y;
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178
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179 painter_set_color(BACKGROUND);
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180 painter_clear();
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181
162
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182 for (size_t i = 0; i < NELEM(view->texts); ++i)
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183 texture_draw(&view->texts[i].tex, view->texts[i].x, view->texts[i].y);
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184
162
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185 /* The error is only available here. */
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186 font_shallow(&font, theme->fonts[THEME_FONT_INTERFACE]);
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187 font.color = FOREGROUND;
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188 font.style = FONT_STYLE_ANTIALIASED;
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189
162
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190 if (!font_render(&font, &tex, error()))
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191 die("%s\n", error());
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192
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193 align(ALIGN_LEFT, &x, &y, tex.w, tex.h, 0, 0, window.w, window.h);
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194
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195 texture_draw(&tex, x + theme->padding, y);
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196 texture_finish(&tex);
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197 }
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198
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199 static void
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200 finish(struct state *state)
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201 {
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202 struct view *view = state->data;
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203
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204 if (!view)
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205 return;
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206
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207 for (size_t i = 0; i < NELEM(view->texts); ++i)
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208 texture_finish(&view->texts[i].tex);
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209
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210 free(view);
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211 memset(state, 0, sizeof (*state));
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212 }
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213
162
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214 void
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215 panic_state(struct state *state)
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216 {
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217 assert(state);
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218
162
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219 memset(state, 0, sizeof (*state));
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220 state->data = init();
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221 state->start = start;
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222 state->handle = handle;
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223 state->draw = draw;
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224 state->finish = finish;
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225 }