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annotate nuklear_ui/blastem_nuklear.c @ 1483:001120e91fed nuklear_ui

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Skip loading menu ROM if Nuklear UI is enabled. Allow disabling Nuklear UI in favor of old menu ROM both at compile time and in config. Fall back to ROM UI if GL is unavailable
author Michael Pavone <pavone@retrodev.com>
date Sat, 25 Nov 2017 20:43:20 -0800
parents 2d203bf73dbd
children d82af64c94d2
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 "../saves.h"
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12 #include "../blastem.h"
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13
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14 static struct nk_context *context;
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15
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16 typedef void (*view_fun)(struct nk_context *);
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17 static view_fun current_view;
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18 static view_fun previous_view;
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19
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20 void view_play(struct nk_context *context)
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21 {
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22
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23 }
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24
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25 void view_load(struct nk_context *context)
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26 {
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27 static char *current_path;
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28 static dir_entry *entries;
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29 static size_t num_entries;
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30 static uint32_t selected_entry;
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31 if (!current_path) {
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32 get_initial_browse_path(&current_path);
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33 }
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34 if (!entries) {
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35 entries = get_dir_list(current_path, &num_entries);
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36 }
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37 uint32_t width = render_width();
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38 uint32_t height = render_height();
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39 if (nk_begin(context, "Load ROM", nk_rect(0, 0, width, height), 0)) {
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40 nk_layout_row_static(context, height - 100, width - 60, 1);
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41 if (nk_group_begin(context, "Select ROM", NK_WINDOW_BORDER | NK_WINDOW_TITLE)) {
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42 nk_layout_row_static(context, 28, width-100, 1);
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43 for (uint32_t i = 0; i < num_entries; i++)
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44 {
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45 int selected = i == selected_entry;
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46 nk_selectable_label(context, entries[i].name, NK_TEXT_ALIGN_LEFT, &selected);
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47 if (selected) {
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48 selected_entry = i;
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49 }
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50 }
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51 nk_group_end(context);
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52 }
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53 nk_layout_row_static(context, 52, width > 600 ? 300 : width / 2, 2);
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54 if (nk_button_label(context, "Back")) {
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55 current_view = previous_view;
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56 }
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57 if (nk_button_label(context, "Open")) {
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58 char *full_path = path_append(current_path, entries[selected_entry].name);
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59 if (entries[selected_entry].is_dir) {
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60 free(current_path);
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61 current_path = full_path;
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62 free_dir_list(entries, num_entries);
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63 entries = NULL;
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64 } else {
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65 if (current_system) {
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66 current_system->next_rom = full_path;
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67 current_system->request_exit(current_system);
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68 } else {
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69 init_system_with_media(full_path, SYSTEM_UNKNOWN);
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70 free(full_path);
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71 }
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72 current_view = view_play;
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73 }
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74 }
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75 nk_end(context);
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76 }
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77 }
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78
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79 void view_about(struct nk_context *context)
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80 {
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81 }
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82
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83 typedef struct {
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84 const char *title;
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85 view_fun next_view;
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86 } menu_item;
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87
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88 static save_slot_info *slots;
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89 static uint32_t num_slots, selected_slot;
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90
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91 void view_choose_state(struct nk_context *context, uint8_t is_load)
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92 {
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93 uint32_t width = render_width();
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94 uint32_t height = render_height();
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95 if (nk_begin(context, "Slot Picker", nk_rect(0, 0, width, height), 0)) {
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96 nk_layout_row_static(context, height - 100, width - 60, 1);
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97 if (nk_group_begin(context, "Select Save Slot", NK_WINDOW_BORDER | NK_WINDOW_TITLE)) {
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98 nk_layout_row_static(context, 28, width-100, 1);
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99 if (!slots) {
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100 slots = get_slot_info(current_system, &num_slots);
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101 }
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102 for (uint32_t i = 0; i < num_slots; i++)
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103 {
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104 int selected = i == selected_slot;
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105 nk_selectable_label(context, slots[i].desc, NK_TEXT_ALIGN_LEFT, &selected);
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106 if (selected && (slots[i].modification_time || !is_load)) {
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107 selected_slot = i;
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108 }
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109 }
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110 nk_group_end(context);
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111 }
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112 nk_layout_row_static(context, 52, width > 600 ? 300 : width / 2, 2);
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113 if (nk_button_label(context, "Back")) {
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114 current_view = previous_view;
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115 }
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116 if (is_load) {
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117 if (nk_button_label(context, "Load")) {
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118 current_system->load_state(current_system, selected_slot);
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119 current_view = view_play;
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120 }
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121 } else {
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122 if (nk_button_label(context, "Save")) {
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123 current_system->save_state = selected_slot + 1;
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124 current_view = view_play;
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125 }
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126 }
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127 nk_end(context);
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128 }
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129 }
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130
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131 void view_save_state(struct nk_context *context)
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132 {
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133 view_choose_state(context, 0);
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134 }
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135
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136 void view_load_state(struct nk_context *context)
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137 {
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138 view_choose_state(context, 1);
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139 }
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140
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141 static void menu(struct nk_context *context, uint32_t num_entries, const menu_item *items)
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142 {
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143 const uint32_t button_height = 52;
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144 const uint32_t ideal_button_width = 300;
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145 const uint32_t button_space = 6;
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146
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147 uint32_t width = render_width();
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148 uint32_t height = render_height();
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149 uint32_t top = height/2 - (button_height * num_entries)/2;
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150 uint32_t button_width = width > ideal_button_width ? ideal_button_width : width;
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151 uint32_t left = width/2 - button_width/2;
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152
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153 nk_layout_space_begin(context, NK_STATIC, top + button_height * num_entries, num_entries);
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154 for (uint32_t i = 0; i < num_entries; i++)
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155 {
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156 nk_layout_space_push(context, nk_rect(left, top + i * button_height, button_width, button_height-button_space));
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157 if (nk_button_label(context, items[i].title)) {
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158 previous_view = current_view;
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159 current_view = items[i].next_view;
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160 if (!current_view) {
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161 exit(0);
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162 }
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163 if (current_view == view_save_state || current_view == view_load_state) {
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164 free_slot_info(slots);
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165 slots = NULL;
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166 }
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167 }
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168 }
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169 nk_layout_space_end(context);
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170 }
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171
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172 void view_pause(struct nk_context *context)
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173 {
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174 static menu_item items[] = {
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175 {"Resume", view_play},
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176 {"Load ROM", view_load},
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177 {"Save State", view_save_state},
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178 {"Load State", view_load_state},
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179 {"Exit", NULL}
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180 };
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181
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182 const uint32_t num_buttons = 3;
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183 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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184 menu(context, sizeof(items)/sizeof(*items), items);
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185 nk_end(context);
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186 }
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187 }
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188
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189 void view_menu(struct nk_context *context)
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190 {
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191 static menu_item items[] = {
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192 {"Load ROM", view_load},
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193 {"About", view_about},
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194 {"Exit", NULL}
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195 };
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196
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197 const uint32_t num_buttons = 3;
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198 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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199 menu(context, sizeof(items)/sizeof(*items), items);
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200 nk_end(context);
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201 }
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202 }
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diff changeset
203
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diff changeset
204 void blastem_nuklear_render(void)
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diff changeset
205 {
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diff changeset
206 nk_input_end(context);
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diff changeset
207 current_view(context);
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208 nk_sdl_render(NK_ANTI_ALIASING_ON, 512 * 1024, 128 * 1024);
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209 nk_input_begin(context);
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210 }
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diff changeset
211
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diff changeset
212 void idle_loop(void)
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213 {
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214 const uint32_t MIN_UI_DELAY = 15;
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diff changeset
215 static uint32_t last;
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216 while (current_view != view_play)
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diff changeset
217 {
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diff changeset
218 uint32_t current = render_elapsed_ms();
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219 if ((current - last) < MIN_UI_DELAY) {
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220 render_sleep_ms(MIN_UI_DELAY - (current - last) - 1);
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221 }
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diff changeset
222 last = current;
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223 render_update_display();
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224 }
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diff changeset
225 }
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diff changeset
226 static void handle_event(SDL_Event *event)
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diff changeset
227 {
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228 nk_sdl_handle_event(event);
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229 }
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diff changeset
230
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diff changeset
231 static void context_destroyed(void)
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232 {
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233 nk_sdl_device_destroy();
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234 }
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235 static void context_created(void)
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236 {
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237 nk_sdl_device_create();
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238 struct nk_font_atlas *atlas;
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239 nk_sdl_font_stash_begin(&atlas);
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240 char *font = default_font_path();
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241 if (!font) {
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242 fatal_error("Failed to find default font path\n");
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243 }
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244 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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245 nk_sdl_font_stash_end();
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246 nk_style_set_font(context, &def_font->handle);
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247 }
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248
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249 void show_pause_menu(void)
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diff changeset
250 {
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diff changeset
251 context->style.window.background = nk_rgba(0, 0, 0, 128);
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252 context->style.window.fixed_background = nk_style_item_color(nk_rgba(0, 0, 0, 128));
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diff changeset
253 current_view = view_pause;
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254 }
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255
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256 static uint8_t active;
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257 uint8_t is_nuklear_active(void)
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258 {
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259 return active;
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260 }
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261
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262 uint8_t is_nuklear_available(void)
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263 {
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264 if (!render_has_gl()) {
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265 //currently no fallback if GL2 unavailable
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266 return 0;
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267 }
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268 char *style = tern_find_path(config, "ui\0style\0", TVAL_PTR).ptrval;
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269 if (!style) {
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270 return 1;
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271 }
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272 return strcmp(style, "rom") != 0;
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273 }
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274
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275 void blastem_nuklear_init(uint8_t file_loaded)
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276 {
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277 context = nk_sdl_init(render_get_window());
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278
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279 struct nk_font_atlas *atlas;
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280 nk_sdl_font_stash_begin(&atlas);
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281 char *font = default_font_path();
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282 if (!font) {
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283 fatal_error("Failed to find default font path\n");
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284 }
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285 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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286 nk_sdl_font_stash_end();
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287 nk_style_set_font(context, &def_font->handle);
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288 current_view = file_loaded ? view_play : view_menu;
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289 render_set_ui_render_fun(blastem_nuklear_render);
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290 render_set_event_handler(handle_event);
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291 render_set_gl_context_handlers(context_destroyed, context_created);
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292 active = 1;
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293 idle_loop();
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294 }