vk_state_tracker: Implement dirty flags for scissors

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -998,6 +998,9 @@ void RasterizerVulkan::UpdateViewportsState(Tegra::Engines::Maxwell3D& gpu) {
 }
 
 void RasterizerVulkan::UpdateScissorsState(Tegra::Engines::Maxwell3D& gpu) {
+    if (!state_tracker.TouchScissors()) {
+        return;
+    }
     const auto& regs = gpu.regs;
     const std::array scissors = {
         GetScissorState(regs, 0),  GetScissorState(regs, 1),  GetScissorState(regs, 2),

src/video_core/renderer_vulkan/vk_state_tracker.cpp

@@ -29,6 +29,7 @@ using Flags = std::remove_reference_t<decltype(Maxwell3D::dirty.flags)>;
 Flags MakeInvalidationFlags() {
     Flags flags{};
     flags[Viewports] = true;
+    flags[Scissors] = true;
     return flags;
 }
 
@@ -71,6 +72,10 @@ void SetupDirtyViewports(Tables& tables) {
     tables[0][OFF(viewport_transform_enabled)] = Viewports;
 }
 
+void SetupDirtyScissors(Tables& tables) {
+    FillBlock(tables[0], OFF(scissor_test), NUM(scissor_test), Scissors);
+}
+
 } // Anonymous namespace
 
 StateTracker::StateTracker(Core::System& system)
@@ -81,6 +86,7 @@ void StateTracker::Initialize() {
     auto& tables = dirty.tables;
     SetupDirtyRenderTargets(tables);
     SetupDirtyViewports(tables);
+    SetupDirtyScissors(tables);
 
     auto& store = dirty.on_write_stores;
     store[RenderTargets] = true;

src/video_core/renderer_vulkan/vk_state_tracker.h

@@ -20,6 +20,7 @@ enum : u8 {
     First = VideoCommon::Dirty::LastCommonEntry,
 
     Viewports,
+    Scissors,
 };
 
 } // namespace Dirty
@@ -36,6 +37,10 @@ public:
         return Exchange(Dirty::Viewports, false);
     }
 
+    bool TouchScissors() {
+        return Exchange(Dirty::Scissors, false);
+    }
+
 private:
     using Flags = std::remove_reference_t<decltype(Tegra::Engines::Maxwell3D::dirty.flags)>;