3 files changed, 17 insertions, 0 deletions
diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index a04e00ecb..2bc534be3 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -69,6 +69,15 @@ void Maxwell3D::InitializeRegisterDefaults() {
     // TODO(Rodrigo): Most games do not set a point size. I think this is a case of a
     // register carrying a default value. Assume it's OpenGL's default (1).
     regs.point_size = 1.0f;
+
+    // TODO(bunnei): Some games do not initialize the color masks (e.g. Sonic Mania). Assuming a
+    // default of enabled fixes rendering here.
+    for (std::size_t color_mask = 0; color_mask < Regs::NumRenderTargets; color_mask++) {
+        regs.color_mask[color_mask].R.Assign(1);
+        regs.color_mask[color_mask].G.Assign(1);
+        regs.color_mask[color_mask].B.Assign(1);
+        regs.color_mask[color_mask].A.Assign(1);
+    }
 }
 
 void Maxwell3D::CallMacroMethod(u32 method, std::vector<u32> parameters) {
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index 9e480dc39..eff6abd55 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -389,6 +389,13 @@ public:
                 ReverseSubtract = 3,
                 Min = 4,
                 Max = 5,
+
+                // These values are used by Nouveau and some games.
+                AddGL = 0x8006,
+                SubtractGL = 0x8007,
+                ReverseSubtractGL = 0x8008,
+                MinGL = 0x800a,
+                MaxGL = 0x800b
             };
 
             enum class Factor : u32 {
diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index 83a6fd875..c5f502ce1 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -153,6 +153,7 @@ enum class PredCondition : u64 {
     NotEqual = 5,
     GreaterEqual = 6,
     LessThanWithNan = 9,
+    LessEqualWithNan = 11,
     GreaterThanWithNan = 12,
     NotEqualWithNan = 13,
     GreaterEqualWithNan = 14,