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annotate nuklear_ui/blastem_nuklear.c @ 1475:afa3fbb76bff nuklear_ui

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Basic support for loading ROMs via Nuklear UI
author Michael Pavone <pavone@retrodev.com>
date Tue, 21 Nov 2017 23:11:11 -0800
parents c5c022c7aa54
children 0646ae0987c3
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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
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18 void view_play(struct nk_context *context)
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19 {
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20
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21 }
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22
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23 void view_load(struct nk_context *context)
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24 {
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25 static char *current_path;
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26 static dir_entry *entries;
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27 static size_t num_entries;
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28 static uint32_t selected_entry;
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29 get_initial_browse_path(&current_path);
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30 if (!entries) {
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31 entries = get_dir_list(current_path, &num_entries);
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32 }
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33 uint32_t width = render_width();
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34 uint32_t height = render_height();
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35 if (nk_begin(context, "Load ROM", nk_rect(0, 0, width, height), 0)) {
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36 nk_layout_row_static(context, height - 100, width - 60, 1);
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37 if (nk_group_begin(context, "Select ROM", NK_WINDOW_BORDER | NK_WINDOW_TITLE)) {
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38 nk_layout_row_static(context, 28, width-100, 1);
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39 for (uint32_t i = 0; i < num_entries; i++)
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40 {
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41 int selected = i == selected_entry;
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42 nk_selectable_label(context, entries[i].name, NK_TEXT_ALIGN_LEFT, &selected);
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43 if (selected) {
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44 selected_entry = i;
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45 }
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46 }
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47 nk_group_end(context);
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48 }
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49 nk_layout_row_static(context, 52, 300, 1);
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50 if (nk_button_label(context, "Open")) {
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51 char const *pieces[] = {current_path, PATH_SEP, entries[selected_entry].name};
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52 if (entries[selected_entry].is_dir) {
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53 char *old = current_path;
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54 current_path = alloc_concat_m(3, pieces);
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55 free(old);
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56 free_dir_list(entries, num_entries);
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57 entries = NULL;
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58 } else {
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59 current_system->next_rom = alloc_concat_m(3, pieces);
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60 current_system->request_exit(current_system);
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61 current_view = view_play;
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62 }
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63 }
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64 nk_end(context);
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65 }
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66 }
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67
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68 void view_about(struct nk_context *context)
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69 {
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70 }
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71
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72 typedef struct {
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73 const char *title;
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74 view_fun next_view;
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75 } menu_item;
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76
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77 static void menu(struct nk_context *context, uint32_t num_entries, const menu_item *items)
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78 {
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79 const uint32_t button_height = 52;
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80 const uint32_t ideal_button_width = 300;
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81 const uint32_t button_space = 6;
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82
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83 uint32_t width = render_width();
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84 uint32_t height = render_height();
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85 uint32_t top = height/2 - (button_height * num_entries)/2;
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86 uint32_t button_width = width > ideal_button_width ? ideal_button_width : width;
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87 uint32_t left = width/2 - button_width/2;
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88
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89 nk_layout_space_begin(context, NK_STATIC, top + button_height * num_entries, num_entries);
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90 for (uint32_t i = 0; i < num_entries; i++)
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91 {
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92 nk_layout_space_push(context, nk_rect(left, top + i * button_height, button_width, button_height-button_space));
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93 if (nk_button_label(context, items[i].title)) {
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94 current_view = items[i].next_view;
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95 if (!current_view) {
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96 exit(0);
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97 }
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98 }
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99 }
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100 nk_layout_space_end(context);
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101 }
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102
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103 void view_menu(struct nk_context *context)
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104 {
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105 static menu_item items[] = {
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106 {"Load ROM", view_load},
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107 {"About", view_about},
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108 {"Exit", NULL}
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109 };
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110
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111 const uint32_t num_buttons = 3;
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112 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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113 menu(context, sizeof(items)/sizeof(*items), items);
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114 nk_end(context);
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115 }
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116 }
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117
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118 void blastem_nuklear_render(void)
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119 {
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120 nk_input_end(context);
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121 current_view(context);
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122 glViewport(0, 0, render_width(), render_height());
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123 /* glClear(GL_COLOR_BUFFER_BIT);
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124 glClearColor(0, 0, 0, 0);*/
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125 nk_sdl_render(NK_ANTI_ALIASING_ON, 512 * 1024, 128 * 1024);
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126 //SDL_GL_SwapWindow(render_get_window());
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127 nk_input_begin(context);
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128 }
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129
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130 void idle_loop(void)
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131 {
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132 while (current_view != view_play)
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133 {
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134 render_update_display();
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135 }
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136 }
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137 static void handle_event(SDL_Event *event)
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138 {
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139 nk_sdl_handle_event(event);
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140 }
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141
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142 void blastem_nuklear_init(uint8_t file_loaded)
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143 {
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144 context = nk_sdl_init(render_get_window());
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145
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146 struct nk_font_atlas *atlas;
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147 nk_sdl_font_stash_begin(&atlas);
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148 char *font = default_font_path();
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149 if (!font) {
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150 fatal_error("Failed to find default font path\n");
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151 }
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152 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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153 nk_sdl_font_stash_end();
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154 nk_style_set_font(context, &def_font->handle);
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155 current_view = file_loaded ? view_play : view_menu;
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156 render_set_ui_render_fun(blastem_nuklear_render);
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157 render_set_event_handler(handle_event);
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158 idle_loop();
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159 }