Add "lock aspect ratio" setting

Uses new Aurora functionality: https://github.com/encounter/aurora/pull/97

Fixes #138

include/dusk/dusk.h

@@ -5,4 +5,12 @@
 
 extern AuroraInfo auroraInfo;
 
+constexpr u32 defaultWindowWidth = 608;
+constexpr u32 defaultWindowHeight = 448;
+
+constexpr u32 defaultAspectRatioW = 19;
+constexpr u32 defaultAspectRatioH = 14;
+
+static_assert(defaultWindowWidth / defaultAspectRatioW == defaultWindowHeight / defaultAspectRatioH);
+
 #endif  // DUSK_DUSK_H

include/dusk/settings.h

@@ -11,6 +11,7 @@ struct UserSettings {
     struct {
         // Video
         bool enableFullscreen;
+        bool lockAspectRatio;
     } video;
 
     struct {

src/dusk/imgui/ImGuiMenuGame.cpp

@@ -6,8 +6,9 @@
 #include <imgui_internal.h>
 
 #include "JSystem/JUtility/JUTGamePad.h"
-#include "dusk/audio/DuskDsp.hpp"
 #include "dusk/audio/DuskAudioSystem.h"
+#include "dusk/audio/DuskDsp.hpp"
+#include "dusk/dusk.h"
 #include "dusk/hotkeys.h"
 #include "dusk/settings.h"
 #include "m_Do/m_Do_controller_pad.h"
@@ -29,6 +30,15 @@ namespace dusk {
                     VISetWindowFullscreen(getSettings().video.enableFullscreen);
                 }
 
+                bool& lockAspect = getSettings().video.lockAspectRatio;
+                if (ImGui::Checkbox("Lock Aspect Ratio", &lockAspect)) {
+                    if (lockAspect) {
+                        VILockAspectRatio(defaultAspectRatioW, defaultAspectRatioH);
+                    } else {
+                        VIUnlockAspectRatio();
+                    }
+                }
+
                 ImGui::EndMenu();
             }
 

src/dusk/settings.cpp

@@ -8,6 +8,7 @@ UserSettings g_userSettings = {
     // Video
     .video = {
         .enableFullscreen = false,
+        .lockAspectRatio = false,
     },
 
     // Audio

src/m_Do/m_Do_main.cpp

@@ -269,8 +269,8 @@ int game_main(int argc, char* argv[]) {
     config.appName = "Dusk";
     config.windowPosX = -1;
     config.windowPosY = -1;
-    config.windowWidth = 608 * 2;
-    config.windowHeight = 448 * 2;
+    config.windowWidth = defaultWindowWidth * 2;
+    config.windowHeight = defaultWindowHeight * 2;
     config.desiredBackend = ParseAuroraBackend(parsed_arg_options["backend"].as<std::string>());
     config.logCallback = &aurora_log_callback;
     config.logLevel = (AuroraLogLevel)parsed_arg_options["log-level"].as<uint8_t>();