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annotate infinite_canvas/main.c @ 276:b55c22cff335

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Add interactive infinite canvas prototype
author MrJuneJune <me@mrjunejune.com>
date Mon, 17 Aug 2026 16:57:56 -0700
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children 8d560f50ed4c
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1 #include "infinite_canvas/canvas.h"
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2 #include "infinite_canvas/web_surface.h"
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3
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4 #if defined(INFINITE_CANVAS_DEV_UI)
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5 #include "infinite_canvas/dev_ui.h"
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6 #endif
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7
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8 #if defined(PLATFORM_WEB)
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9 #include <emscripten/emscripten.h>
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10 #endif
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11
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12 #include <stdio.h>
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13 #include <stdlib.h>
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14 #include <string.h>
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15
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16 typedef struct {
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17 Dowa_Arena *p_arena;
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18 Canvas_Camera camera;
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19 Canvas_Scene scene;
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20 Canvas_Web_Surface web_surface;
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21 Font font;
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22 Canvas_Theme theme;
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23 boolean owns_font;
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24 const char *p_screenshot_path;
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25 uint32 frame_count;
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26 #if defined(INFINITE_CANVAS_DEV_UI)
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27 Canvas_Dev_UI dev_ui;
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28 #endif
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29 } Canvas_App;
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30
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31 static Canvas_App *g_app = NULL;
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32
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33 static void Canvas_App_Draw_Frame(void)
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34 {
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35 int32 width = GetScreenWidth();
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36 int32 height = GetScreenHeight();
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37 Canvas_Camera_Set_Viewport(&g_app->camera, width, height);
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38
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39 boolean block_pointer_input = FALSE;
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40 #if defined(INFINITE_CANVAS_DEV_UI)
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41 block_pointer_input = Canvas_Dev_UI_Contains_Pointer(&g_app->dev_ui);
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42 #endif
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43 boolean web_input = Canvas_Web_Surface_Update_Input(
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44 &g_app->web_surface,
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45 &g_app->camera,
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46 &g_app->scene);
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47 block_pointer_input = block_pointer_input || web_input;
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48 boolean entity_input = Canvas_Scene_Update_Interaction(
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49 &g_app->scene,
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50 &g_app->camera,
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51 block_pointer_input);
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52 boolean keyboard_focus =
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53 Canvas_Scene_Is_Text_Editing(&g_app->scene) ||
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54 Canvas_Web_Surface_Is_Focused(&g_app->web_surface);
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55 if (!keyboard_focus && IsKeyPressed(KEY_P)) {
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56 Canvas_Scene_Toggle_Selected_Pin(&g_app->scene, &g_app->camera);
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57 }
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58 Canvas_Update_Camera_Input(
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59 &g_app->camera,
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60 block_pointer_input || entity_input,
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61 keyboard_focus);
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62 Canvas_Scene_Sync_Pinned(&g_app->scene, &g_app->camera);
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63 Canvas_Scene_Update_Notification_Stack(&g_app->scene, &g_app->camera);
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64
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65 Canvas_Web_Surface_Sync(&g_app->web_surface, &g_app->camera, &g_app->scene);
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66
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67 BeginDrawing();
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68 ClearBackground(g_app->theme.background);
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69 Canvas_Draw_World(
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70 &g_app->camera,
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71 &g_app->scene,
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72 g_app->font,
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73 &g_app->theme);
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74 Canvas_Web_Surface_Draw(&g_app->web_surface, &g_app->camera, &g_app->scene);
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75 #if defined(INFINITE_CANVAS_DEV_UI)
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76 Canvas_Dev_UI_Draw(
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77 &g_app->dev_ui,
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78 &g_app->camera,
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79 &g_app->scene,
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80 g_app->font,
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81 &g_app->theme);
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82 #endif
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83 EndDrawing();
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84 g_app->frame_count++;
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85 #if !defined(PLATFORM_WEB)
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86 if (g_app->frame_count == 30) {
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87 RestoreWindow();
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88 SetWindowFocused();
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89 }
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90 #endif
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91 if (g_app->p_screenshot_path &&
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92 g_app->frame_count == 180) {
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93 TakeScreenshot(g_app->p_screenshot_path);
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94 }
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95 }
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96
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97 int main(int argc, char **p_argv)
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98 {
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99 #if !defined(PLATFORM_WEB)
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100 int32 subprocess_result = Canvas_Web_Surface_Execute_Subprocess(argc, p_argv);
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101 if (subprocess_result >= 0) return subprocess_result;
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102 #else
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103 (void)argc;
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104 (void)p_argv;
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105 #endif
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106
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107 Dowa_Arena *p_arena = Dowa_Arena_Create(8 * ONE_MEGA_BYTE);
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108 if (!p_arena) return 1;
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109
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110 g_app = (Canvas_App *)Dowa_Arena_Allocate(p_arena, sizeof(*g_app));
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111 if (!g_app) {
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112 Dowa_Arena_Free(p_arena);
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113 return 1;
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114 }
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115 memset(g_app, 0, sizeof(*g_app));
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116 g_app->p_arena = p_arena;
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117 g_app->p_screenshot_path = getenv("INFINITE_CANVAS_SCREENSHOT");
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118 Canvas_Theme_Resolve(
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119 &g_app->theme,
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120 Canvas_Theme_Mode_From_String(getenv("INFINITE_CANVAS_THEME")));
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121
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122 SetConfigFlags(FLAG_WINDOW_RESIZABLE | FLAG_WINDOW_HIGHDPI | FLAG_MSAA_4X_HINT);
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123 #if defined(INFINITE_CANVAS_DEV_UI)
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124 InitWindow(1920, 1200, "Infinite Canvas");
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125 SetWindowMinSize(1200, 800);
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126 #else
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127 InitWindow(1280, 720, "Infinite Canvas");
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128 SetWindowMinSize(640, 360);
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129 #endif
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130 SetTargetFPS(60);
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131 #if !defined(PLATFORM_WEB)
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132 SetWindowFocused();
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133 #endif
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134 if (!Canvas_Web_Surface_Init(&g_app->web_surface, p_arena)) {
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135 TraceLog(LOG_WARNING, "Web surface initialization failed");
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136 }
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137
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138 g_app->font = LoadFontEx("infinite_canvas/assets/Inter-Variable.ttf", 48, NULL, 0);
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139 g_app->owns_font = g_app->font.texture.id != 0;
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140 if (!g_app->owns_font) g_app->font = GetFontDefault();
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141 else SetTextureFilter(g_app->font.texture, TEXTURE_FILTER_BILINEAR);
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142 Canvas_Camera_Init(&g_app->camera, GetScreenWidth(), GetScreenHeight());
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143 Canvas_Scene_Init(&g_app->scene, p_arena);
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144 if (getenv("INFINITE_CANVAS_BROWSER_STRESS")) {
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145 Canvas_Scene_Add_Browser_Grid(&g_app->scene);
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146 } else {
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147 Canvas_Scene_Add_Demo(&g_app->scene);
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148 }
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149 const char *p_image_source = getenv("INFINITE_CANVAS_IMAGE_SOURCE");
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150 if (p_image_source) {
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151 for (size_t index = 0; index < Dowa_Array_Length(g_app->scene.p_entities); index++) {
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152 Canvas_Entity *p_entity = &g_app->scene.p_entities[index];
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153 if (p_entity->type == CANVAS_ENTITY_IMAGE) {
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154 snprintf(p_entity->text, sizeof(p_entity->text), "%s", p_image_source);
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155 break;
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156 }
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157 }
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158 }
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159 #if !defined(PLATFORM_WEB)
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160 for (size_t index = 0; index < Dowa_Array_Length(g_app->scene.p_entities); index++) {
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161 Canvas_Entity *p_entity = &g_app->scene.p_entities[index];
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162 if (p_entity->type == CANVAS_ENTITY_WEB_CONTENT) {
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163 snprintf(p_entity->text, sizeof(p_entity->text), "https://www.google.com");
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164 break;
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165 }
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166 }
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167 #endif
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168 #if defined(INFINITE_CANVAS_DEV_UI)
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169 Canvas_Dev_UI_Init(&g_app->dev_ui, g_app->font, &g_app->theme);
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170 #endif
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171
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172 #if defined(PLATFORM_WEB)
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173 emscripten_set_main_loop(Canvas_App_Draw_Frame, 0, 1);
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174 #else
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175 while (!WindowShouldClose()) Canvas_App_Draw_Frame();
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176 Canvas_Web_Surface_Shutdown(&g_app->web_surface);
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177 if (g_app->owns_font) UnloadFont(g_app->font);
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178 Dowa_Arena_Free(p_arena);
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179 g_app = NULL;
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180 CloseWindow();
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181 #endif
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182
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183 return 0;
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184 }