vk_state_tracker: Implement dirty flags for blend constants

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -1026,6 +1026,9 @@ void RasterizerVulkan::UpdateDepthBias(Tegra::Engines::Maxwell3D& gpu) {
 }
 
 void RasterizerVulkan::UpdateBlendConstants(Tegra::Engines::Maxwell3D& gpu) {
+    if (!state_tracker.TouchBlendConstants()) {
+        return;
+    }
     const std::array blend_color = {gpu.regs.blend_color.r, gpu.regs.blend_color.g,
                                     gpu.regs.blend_color.b, gpu.regs.blend_color.a};
     scheduler.Record([blend_color](auto cmdbuf, auto& dld) {

src/video_core/renderer_vulkan/vk_state_tracker.cpp

@@ -31,6 +31,7 @@ Flags MakeInvalidationFlags() {
     flags[Viewports] = true;
     flags[Scissors] = true;
     flags[DepthBias] = true;
+    flags[BlendConstants] = true;
     return flags;
 }
 
@@ -84,6 +85,10 @@ void SetupDirtyDepthBias(Tables& tables) {
     table[OFF(polygon_offset_factor)] = DepthBias;
 }
 
+void SetupDirtyBlendConstants(Tables& tables) {
+    FillBlock(tables[0], OFF(blend_color), NUM(blend_color), BlendConstants);
+}
+
 } // Anonymous namespace
 
 StateTracker::StateTracker(Core::System& system)
@@ -96,6 +101,7 @@ void StateTracker::Initialize() {
     SetupDirtyViewports(tables);
     SetupDirtyScissors(tables);
     SetupDirtyDepthBias(tables);
+    SetupDirtyBlendConstants(tables);
 
     auto& store = dirty.on_write_stores;
     store[RenderTargets] = true;

src/video_core/renderer_vulkan/vk_state_tracker.h

@@ -22,6 +22,7 @@ enum : u8 {
     Viewports,
     Scissors,
     DepthBias,
+    BlendConstants,
 };
 
 } // namespace Dirty
@@ -46,6 +47,10 @@ public:
         return Exchange(Dirty::DepthBias, false);
     }
 
+    bool TouchBlendConstants() {
+        return Exchange(Dirty::BlendConstants, false);
+    }
+
 private:
     using Flags = std::remove_reference_t<decltype(Tegra::Engines::Maxwell3D::dirty.flags)>;