restructure more

ThirdParty/entt/testbed/application/application.cpp

@@ -0,0 +1,92 @@
+#include <cstdint>
+#include <SDL3/SDL.h>
+#include <application/application.h>
+#include <application/context.h>
+#include <backends/imgui_impl_sdl3.h>
+#include <backends/imgui_impl_sdlrenderer3.h>
+#include <component/input_listener_component.h>
+#include <component/position_component.h>
+#include <component/rect_component.h>
+#include <component/renderable_component.h>
+#include <entt/entity/registry.hpp>
+#include <imgui.h>
+#include <meta/meta.h>
+#include <system/hud_system.h>
+#include <system/imgui_system.h>
+#include <system/input_system.h>
+#include <system/rendering_system.h>
+
+namespace testbed {
+
+void application::update(entt::registry &registry) {
+    ImGui_ImplSDLRenderer3_NewFrame();
+    ImGui_ImplSDL3_NewFrame();
+    ImGui::NewFrame();
+
+    // update...
+    static_cast<void>(registry);
+}
+
+void application::draw(entt::registry &registry, const context &context) const {
+    SDL_SetRenderDrawColor(context, 0u, 0u, 0u, SDL_ALPHA_OPAQUE);
+    SDL_RenderClear(context);
+
+    rendering_system(registry, context);
+    hud_system(registry, context);
+    imgui_system(registry);
+
+    ImGui::Render();
+    ImGuiIO &io = ImGui::GetIO();
+    SDL_SetRenderScale(context, io.DisplayFramebufferScale.x, io.DisplayFramebufferScale.y);
+    ImGui_ImplSDLRenderer3_RenderDrawData(ImGui::GetDrawData(), context);
+
+    SDL_RenderPresent(context);
+}
+
+void application::input(entt::registry &registry) {
+    ImGuiIO &io = ImGui::GetIO();
+    SDL_Event event{};
+
+    while(SDL_PollEvent(&event)) {
+        ImGui_ImplSDL3_ProcessEvent(&event);
+        input_system(registry, event, quit);
+    }
+}
+
+application::application()
+    : quit{} {
+    SDL_Init(SDL_INIT_EVENTS | SDL_INIT_VIDEO);
+}
+
+application::~application() {
+    SDL_Quit();
+}
+
+static void static_setup_for_dev_purposes(entt::registry &registry) {
+    const auto entt = registry.create();
+
+    registry.emplace<input_listener_component>(entt);
+    registry.emplace<position_component>(entt, SDL_FPoint{400.f, 400.f});
+    registry.emplace<rect_component>(entt, SDL_FRect{0.f, 0.f, 20.f, 20.f});
+    registry.emplace<renderable_component>(entt);
+}
+
+int application::run() {
+    entt::registry registry{};
+    context context{};
+
+    meta_setup();
+    static_setup_for_dev_purposes(registry);
+
+    quit = false;
+
+    while(!quit) {
+        update(registry);
+        draw(registry, context);
+        input(registry);
+    }
+
+    return 0;
+}
+
+} // namespace testbed