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annotate src/adventure/panic_state.c @ 117:445035ace840

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core: fix panic handling early
author David Demelier <markand@malikania.fr>
date Sat, 03 Oct 2020 19:03:22 +0200
parents c7e993455985
children
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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
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23 #include <error.h>
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24 #include <event.h>
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25 #include <font.h>
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26 #include <game.h>
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27 #include <painter.h>
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28 #include <sys.h>
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29 #include <texture.h>
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30 #include <util.h>
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31 #include <window.h>
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32 #include <map_state.h>
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33
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34 #include <assets/fonts/Lato-Regular.h>
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35
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36 #include "panic_state.h"
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37
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38 #define BACKGROUND 0x4f5070ff
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39 #define FOREGROUND 0xffffffff
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40
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41 #define SIZE 16
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42 #define PADDING 20
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43
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44 #define OUT "molko-adventure.txt"
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45
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46 struct label {
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47 const char *text;
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48 struct texture texture;
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49 };
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50
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51 static struct {
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52 struct font font;
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53 } data;
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54
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55 static struct label headers[] = {
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56 { "An unrecoverable error occured and the game cannot continue.", 0 },
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57 { "Please report the detailed error as provided below.", 0 },
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58 };
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59
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60 static struct label bottom[] = {
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61 { "Press <s> to save information and generate a core dump.", 0 },
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62 { "Press <q> to quit without saving information.", 0 }
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63 };
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64
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65 static struct label lerror;
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66
89
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67 static void
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68 die(const char *fmt, ...)
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69 {
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70 assert(fmt);
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71
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72 va_list ap;
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73
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74 va_start(ap, fmt);
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75 fprintf(stderr, "abort: ");
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76 vfprintf(stderr, fmt, ap);
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77 va_end(ap);
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78 exit(1);
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79 }
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80
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81 static void
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82 enter(void)
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83 {
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84 }
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85
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86 static void
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87 dump(void)
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88 {
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89 FILE *fp;
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90
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91 if (!(fp = fopen(OUT, "w")))
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92 goto dump;
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93
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94 /* Print various information. */
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95 fprintf(fp, "Molko's Adventure crash dump report\n");
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96 fprintf(fp, "== state map dump ==\n");
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97 fprintf(fp, "map:\n");
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98 fprintf(fp, " w %u\n", map_state_data.map.data.w);
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99 fprintf(fp, " h %u\n", map_state_data.map.data.h);
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100 fprintf(fp, "player:\n");
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101 fprintf(fp, " x: %u\n", map_state_data.player.x);
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102 fprintf(fp, " y: %u\n", map_state_data.player.y);
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103 fprintf(fp, "view:\n");
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104 fprintf(fp, " w: %u\n", map_state_data.view.w);
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105 fprintf(fp, " h: %u\n", map_state_data.view.h);
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106 fprintf(fp, " x: %u\n", map_state_data.view.x);
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107 fprintf(fp, " y: %u\n", map_state_data.view.y);
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108
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109 dump:
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110 if (fp)
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111 fclose(fp);
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112
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113 abort();
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114 }
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115
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116 static void
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117 handle_keydown(const struct event_key *ev)
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118 {
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119 assert(ev);
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120
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121 switch (ev->key) {
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122 case KEY_q:
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123 game_quit();
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124 break;
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125 case KEY_s:
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126 dump();
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127 break;
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128 default:
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129 break;
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130 }
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131 }
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132
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133 static void
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134 handle(const union event *ev)
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135 {
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136 assert(ev);
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137
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138 switch (ev->type) {
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139 case EVENT_KEYDOWN:
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140 handle_keydown(&ev->key);
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141 break;
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142 default:
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143 break;
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144 }
89
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145 }
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146
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147 static void
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148 generate(struct label labels[], size_t labelsz)
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149 {
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150 assert(labels);
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151
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152 for (size_t i = 0; i < labelsz; ++i) {
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153 if (texture_ok(&labels[i].texture))
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154 continue;
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155
94
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156 data.font.color = FOREGROUND;
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157 font_render(&data.font, &labels[i].texture, labels[i].text);
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158
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159 if (!texture_ok(&labels[i].texture))
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160 die("%s\n", error());
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161 }
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162 }
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163
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164 static void
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165 update(unsigned int ticks)
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166 {
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167 (void)ticks;
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168
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169 lerror.text = error();
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170
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171 generate(headers, NELEM(headers));
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172 generate(&lerror, 1);
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173 generate(bottom, NELEM(bottom));
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174 }
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175
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176 static void
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177 draw(void)
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178 {
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179 int y = PADDING;
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180
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181 painter_set_target(NULL);
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182 painter_set_color(BACKGROUND);
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183 painter_clear();
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184
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185 /* Header. */
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186 for (size_t i = 0; i < NELEM(headers); ++i) {
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187 texture_draw(&headers[i].texture, PADDING, y);
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188 y += headers[i].texture.h + 2;
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189 }
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190
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191 /* Error message. */
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192 texture_draw(&lerror.texture, PADDING, y + PADDING);
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193
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194 /* Bottom. */
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195 y = window.h - PADDING;
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196 y -= bottom[0].texture.h;
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197
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198 for (size_t i = 0; i < NELEM(bottom); ++i) {
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199 texture_draw(&bottom[i].texture, PADDING, y);
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200 y -= bottom[i].texture.h + 2;
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201 }
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202 }
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203
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204 static void
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205 leave(void)
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206 {
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207 }
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208
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209 struct state panic_state = {
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210 .enter = enter,
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211 .handle = handle,
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212 .update = update,
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213 .draw = draw,
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214 .leave = leave
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215 };
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216
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217 void
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218 panic_state_init(void)
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219 {
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220 /*
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221 * If the panic state can not be loaded we're unable to show any
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222 * useful information to the screen so as last resort print them
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223 * on the console.
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224 */
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225 if (!(font_openmem(&data.font, Lato_Regular, sizeof (Lato_Regular), SIZE)))
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226 die("%s", error());
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227 }