gl_state_tracker: Implement dirty flags for multisample

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -1130,6 +1130,13 @@ void RasterizerOpenGL::SyncColorMask() {
 }
 
 void RasterizerOpenGL::SyncMultiSampleState() {
+    auto& gpu = system.GPU().Maxwell3D();
+    auto& flags = gpu.dirty.flags;
+    if (!flags[Dirty::MultisampleControl]) {
+        return;
+    }
+    flags[Dirty::MultisampleControl] = false;
+
     const auto& regs = system.GPU().Maxwell3D().regs;
     oglEnable(GL_SAMPLE_ALPHA_TO_COVERAGE, regs.multisample_control.alpha_to_coverage);
     oglEnable(GL_SAMPLE_ALPHA_TO_ONE, regs.multisample_control.alpha_to_one);

src/video_core/renderer_opengl/gl_state_tracker.cpp

@@ -185,6 +185,10 @@ void SetupDirtyPolygonOffset(Tables& tables) {
     table[OFF(polygon_offset_clamp)] = PolygonOffset;
 }
 
+void SetupDirtyMultisampleControl(Tables& tables) {
+    FillBlock(tables[0], OFF(multisample_control), NUM(multisample_control), MultisampleControl);
+}
+
 void SetupDirtyMisc(Tables& tables) {
     auto& table = tables[0];
 
@@ -216,6 +220,7 @@ void StateTracker::Initialize() {
     SetupDirtyBlend(tables);
     SetupDirtyPrimitiveRestart(tables);
     SetupDirtyPolygonOffset(tables);
+    SetupDirtyMultisampleControl(tables);
     SetupDirtyMisc(tables);
 
     auto& store = dirty.on_write_stores;

src/video_core/renderer_opengl/gl_state_tracker.h

@@ -65,6 +65,7 @@ enum : u8 {
     AlphaTest,
     PrimitiveRestart,
     PolygonOffset,
+    MultisampleControl,
 
     Last
 };