implement pre-launch ui for configuring iso directory (#301)

UI will automatically open on boot and will not launch the game if there is no valid iso path specified in the config. Can optionally be disabled on future game launches.

src/m_Do/m_Do_main.cpp

@@ -62,6 +62,7 @@
 #include "SDL3/SDL_filesystem.h"
 #include "cxxopts.hpp"
 #include "dusk/config.hpp"
+#include "dusk/imgui/ImGuiConsole.hpp"
 #include "tracy/Tracy.hpp"
 
 // --- GLOBALS ---
@@ -83,6 +84,7 @@ const int audioHeapSize = 0x14D800;
 
 #if TARGET_PC
 bool dusk::IsShuttingDown = false;
+bool dusk::IsGameLaunched = false;
 #endif
 
 s32 LOAD_COPYDATE(void*) {
@@ -117,6 +119,43 @@ AuroraStats dusk::lastFrameAuroraStats;
 float dusk::frameUsagePct = 0.0f;
 const char* configPath;
 
+AuroraWindowSize preLaunchUIWindowSize;
+
+bool launchUILoop() {
+    while (!dusk::IsGameLaunched) {
+        const AuroraEvent* event = aurora_update();
+        while (event != nullptr && event->type != AURORA_NONE) {
+            switch (event->type) {
+            case AURORA_WINDOW_RESIZED:
+                preLaunchUIWindowSize = event->windowSize;
+                break;
+            case AURORA_DISPLAY_SCALE_CHANGED:
+                dusk::ImGuiEngine_Initialize(event->windowSize.scale);
+                break;
+            case AURORA_EXIT:
+                return false;
+            }
+
+            event++;
+        }
+
+        if (!aurora_begin_frame()) {
+            DuskLog.debug("aurora_begin_frame returned false, skipping draw this frame");
+            continue;
+        }
+
+        dusk::g_imguiConsole.PreDraw();
+
+        dusk::g_imguiConsole.PostDraw();
+
+        aurora_end_frame();
+    }
+
+    DuskLog.info("Game Launched!");
+
+    return true;
+}
+
 void main01(void) {
     OS_REPORT("\x1b[m");
 
@@ -155,6 +194,8 @@ void main01(void) {
 
     OSReport("Entering Main Loop (main01)...\n");
 
+    if (preLaunchUIWindowSize.width != 0)
+        mDoGph_gInf_c::setWindowSize(preLaunchUIWindowSize);
 
     do {
         // 1. Update Window Events
@@ -243,6 +284,7 @@ static AuroraBackend ParseAuroraBackend(const std::string& value) {
 
 static void aurora_imgui_init_callback(const AuroraWindowSize* size) {
     dusk::ImGuiEngine_Initialize(size->scale);
+    dusk::ImGuiEngine_AddTextures();
 }
 
 static void ApplyCVarOverrides(const cxxopts::OptionValue& option) {
@@ -380,7 +422,22 @@ int game_main(int argc, char* argv[]) {
         fmt::format("Dusk {} [{}]", DUSK_WC_DESCRIBE, dusk::backend_name(auroraInfo.backend))
             .c_str());
 
-    const auto& dvd_path = parsed_arg_options["dvd"].as<std::string>();
+    // pre game launch ui main loop
+    if (!launchUILoop()) {
+        aurora_shutdown();
+        return 0;
+    }
+
+    std::string dvd_path;
+    if (parsed_arg_options.count("dvd")) {
+        dvd_path = parsed_arg_options["dvd"].as<std::string>();
+    }else {
+        dvd_path = dusk::getSettings().backend.isoPath;
+
+        if (dvd_path.empty()) {
+            DuskLog.fatal("No DVD image specified, unable to boot!");
+        }
+    }
     DuskLog.info("Loading DVD image: {}", dvd_path);
     if (!aurora_dvd_open(dvd_path.c_str())) {
         DuskLog.fatal("Failed to open DVD image: {}", dvd_path);