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annotate nuklear_ui/blastem_nuklear.c @ 1477:1cdd7f492af8 nuklear_ui

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Pause menu now triggered on ui.exit event
author Michael Pavone <pavone@retrodev.com>
date Wed, 22 Nov 2017 11:18:36 -0800
parents 0646ae0987c3
children da1dce39e846
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #define NK_IMPLEMENTATION
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2 #define NK_SDL_GLES2_IMPLEMENTATION
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3
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4 #include <stdlib.h>
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5 #include "blastem_nuklear.h"
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6 #include "font.h"
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7 #include "../render.h"
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8 #include "../render_sdl.h"
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9 #include "../util.h"
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10 #include "../paths.h"
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11 #include "../blastem.h"
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12
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13 static struct nk_context *context;
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14
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15 typedef void (*view_fun)(struct nk_context *);
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16 static view_fun current_view;
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17 static view_fun previous_view;
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18
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19 void view_play(struct nk_context *context)
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20 {
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21
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22 }
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23
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24 void view_load(struct nk_context *context)
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25 {
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26 static char *current_path;
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27 static dir_entry *entries;
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28 static size_t num_entries;
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29 static uint32_t selected_entry;
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30 get_initial_browse_path(&current_path);
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31 if (!entries) {
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32 entries = get_dir_list(current_path, &num_entries);
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33 }
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34 uint32_t width = render_width();
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35 uint32_t height = render_height();
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36 if (nk_begin(context, "Load ROM", nk_rect(0, 0, width, height), 0)) {
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37 nk_layout_row_static(context, height - 100, width - 60, 1);
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38 if (nk_group_begin(context, "Select ROM", NK_WINDOW_BORDER | NK_WINDOW_TITLE)) {
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39 nk_layout_row_static(context, 28, width-100, 1);
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40 for (uint32_t i = 0; i < num_entries; i++)
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41 {
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42 int selected = i == selected_entry;
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43 nk_selectable_label(context, entries[i].name, NK_TEXT_ALIGN_LEFT, &selected);
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44 if (selected) {
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45 selected_entry = i;
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46 }
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47 }
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48 nk_group_end(context);
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49 }
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50 nk_layout_row_static(context, 52, width > 600 ? 300 : width / 2, 2);
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51 if (nk_button_label(context, "Back")) {
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52 current_view = previous_view;
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53 }
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54 if (nk_button_label(context, "Open")) {
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55 char const *pieces[] = {current_path, PATH_SEP, entries[selected_entry].name};
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56 if (entries[selected_entry].is_dir) {
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57 char *old = current_path;
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58 current_path = alloc_concat_m(3, pieces);
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59 free(old);
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60 free_dir_list(entries, num_entries);
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61 entries = NULL;
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62 } else {
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63 current_system->next_rom = alloc_concat_m(3, pieces);
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64 current_system->request_exit(current_system);
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65 current_view = view_play;
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66 }
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67 }
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68 nk_end(context);
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69 }
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70 }
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71
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72 void view_about(struct nk_context *context)
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73 {
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74 }
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75
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76 typedef struct {
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77 const char *title;
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78 view_fun next_view;
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79 } menu_item;
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80
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81 static void menu(struct nk_context *context, uint32_t num_entries, const menu_item *items)
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82 {
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83 const uint32_t button_height = 52;
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84 const uint32_t ideal_button_width = 300;
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85 const uint32_t button_space = 6;
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86
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87 uint32_t width = render_width();
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88 uint32_t height = render_height();
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89 uint32_t top = height/2 - (button_height * num_entries)/2;
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90 uint32_t button_width = width > ideal_button_width ? ideal_button_width : width;
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91 uint32_t left = width/2 - button_width/2;
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92
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93 nk_layout_space_begin(context, NK_STATIC, top + button_height * num_entries, num_entries);
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94 for (uint32_t i = 0; i < num_entries; i++)
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95 {
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96 nk_layout_space_push(context, nk_rect(left, top + i * button_height, button_width, button_height-button_space));
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97 if (nk_button_label(context, items[i].title)) {
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98 previous_view = current_view;
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99 current_view = items[i].next_view;
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100 if (!current_view) {
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101 exit(0);
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102 }
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103 }
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104 }
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105 nk_layout_space_end(context);
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106 }
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107
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108 void view_choose_state(struct nk_context *context, uint8_t is_load)
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109 {
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110
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111 }
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112
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113 void view_save_state(struct nk_context *context)
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114 {
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115 view_choose_state(context, 0);
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116 }
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117
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118 void view_load_state(struct nk_context *context)
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119 {
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120 view_choose_state(context, 1);
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121 }
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122
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123 void view_pause(struct nk_context *context)
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124 {
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125 static menu_item items[] = {
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126 {"Resume", view_play},
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127 {"Load ROM", view_load},
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128 {"Save State", view_save_state},
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129 {"Load State", view_load_state},
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130 {"Exit", NULL}
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131 };
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132
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133 const uint32_t num_buttons = 3;
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134 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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135 menu(context, sizeof(items)/sizeof(*items), items);
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136 nk_end(context);
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137 }
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138 }
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139
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140 void view_menu(struct nk_context *context)
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141 {
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142 static menu_item items[] = {
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143 {"Load ROM", view_load},
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144 {"About", view_about},
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145 {"Exit", NULL}
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146 };
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147
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148 const uint32_t num_buttons = 3;
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149 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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150 menu(context, sizeof(items)/sizeof(*items), items);
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151 nk_end(context);
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152 }
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153 }
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154
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155 void blastem_nuklear_render(void)
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156 {
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157 nk_input_end(context);
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158 current_view(context);
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159 nk_sdl_render(NK_ANTI_ALIASING_ON, 512 * 1024, 128 * 1024);
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160 nk_input_begin(context);
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161 }
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162
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163 void idle_loop(void)
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164 {
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165 while (current_view != view_play)
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166 {
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167 render_update_display();
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168 }
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169 }
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170 static void handle_event(SDL_Event *event)
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171 {
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172 nk_sdl_handle_event(event);
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173 }
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174
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175 static void context_destroyed(void)
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176 {
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177 nk_sdl_device_destroy();
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178 }
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179 static void context_created(void)
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180 {
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181 nk_sdl_device_create();
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182 struct nk_font_atlas *atlas;
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183 nk_sdl_font_stash_begin(&atlas);
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184 char *font = default_font_path();
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185 if (!font) {
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186 fatal_error("Failed to find default font path\n");
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187 }
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188 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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189 nk_sdl_font_stash_end();
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190 nk_style_set_font(context, &def_font->handle);
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191 }
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192
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193 void show_pause_menu(void)
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194 {
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195 context->style.window.background = nk_rgba(0, 0, 0, 128);
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196 context->style.window.fixed_background = nk_style_item_color(nk_rgba(0, 0, 0, 128));
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197 current_view = view_pause;
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198 }
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199
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200 static uint8_t active;
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201 uint8_t is_nuklear_active(void)
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202 {
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203 return active;
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204 }
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205
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206 void blastem_nuklear_init(uint8_t file_loaded)
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207 {
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208 context = nk_sdl_init(render_get_window());
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209
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210 struct nk_font_atlas *atlas;
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211 nk_sdl_font_stash_begin(&atlas);
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212 char *font = default_font_path();
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213 if (!font) {
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214 fatal_error("Failed to find default font path\n");
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215 }
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216 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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217 nk_sdl_font_stash_end();
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218 nk_style_set_font(context, &def_font->handle);
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219 current_view = file_loaded ? view_play : view_menu;
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220 render_set_ui_render_fun(blastem_nuklear_render);
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221 render_set_event_handler(handle_event);
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222 render_set_gl_context_handlers(context_destroyed, context_created);
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223 active = 1;
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224 idle_loop();
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225 }