renderer_base: Add GetSampleCount

Only enables sample counts higher than 1 on vulkan

src/video_core/renderer_base.cpp

@@ -29,6 +29,17 @@ u32 RendererBase::GetResolutionScaleFactor() {
                              : render_window.GetFramebufferLayout().GetScalingRatio();
 }
 
+u8 RendererBase::GetSampleCount() const {
+    const auto graphics_api = Settings::values.graphics_api.GetValue();
+
+    // Enabled for vulkan only for now
+    if (graphics_api != Settings::GraphicsAPI::Vulkan) {
+        return 1;
+    }
+
+    return Settings::values.sample_count.GetValue();
+}
+
 void RendererBase::UpdateCurrentFramebufferLayout(bool is_portrait_mode) {
     const auto update_layout = [is_portrait_mode](Frontend::EmuWindow& window) {
         const Layout::FramebufferLayout& layout = window.GetFramebufferLayout();

src/video_core/renderer_base.h

@@ -69,6 +69,9 @@ public:
     /// Returns the resolution scale factor relative to the native 3DS screen resolution
     u32 GetResolutionScaleFactor();
 
+    /// Returns the MSAA sample count
+    u8 GetSampleCount() const;
+
     /// Updates the framebuffer layout of the contained render window handle.
     void UpdateCurrentFramebufferLayout(bool is_portrait_mode = {});