2 files changed, 31 insertions, 1 deletions
diff --git a/src/amberscript/parser.cc b/src/amberscript/parser.cc
index d3e0eb6..8cd6e19 100644
--- a/src/amberscript/parser.cc
+++ b/src/amberscript/parser.cc
@@ -3893,6 +3893,30 @@ Result Parser::ParseSampler() {
       sampler->SetNormalizedCoords(false);
       sampler->SetMinLOD(0.0f);
       sampler->SetMaxLOD(0.0f);
+    } else if (param == "COMPARE") {
+      token = tokenizer_->NextToken();
+
+      if (!token->IsIdentifier())
+        return Result("invalid value for COMPARE");
+
+      if (token->AsString() == "on")
+        sampler->SetCompareEnable(true);
+      else if (token->AsString() == "off")
+        sampler->SetCompareEnable(false);
+      else
+        return Result("invalid value for COMPARE: " + token->AsString());
+    } else if (param == "COMPARE_OP") {
+      token = tokenizer_->NextToken();
+
+      if (!token->IsIdentifier())
+        return Result("invalid value for COMPARE_OP");
+
+      CompareOp compare_op = StrToCompareOp(token->AsString());
+      if (compare_op != CompareOp::kUnknown) {
+        sampler->SetCompareOp(compare_op);
+      } else {
+        return Result("invalid value for COMPARE_OP: " + token->AsString());
+      }
     } else {
       return Result("unexpected sampler parameter " + param);
     }
diff --git a/src/amberscript/parser_sampler_test.cc b/src/amberscript/parser_sampler_test.cc
index 6cba69d..d4b0dd1 100644
--- a/src/amberscript/parser_sampler_test.cc
+++ b/src/amberscript/parser_sampler_test.cc
@@ -45,6 +45,8 @@ TEST_F(AmberScriptParserTest, SamplerDefaultValues) {
   EXPECT_EQ(0.0, sampler->GetMinLOD());
   EXPECT_EQ(1.0, sampler->GetMaxLOD());
   EXPECT_EQ(true, sampler->GetNormalizedCoords());
+  EXPECT_EQ(false, sampler->GetCompareEnable());
+  EXPECT_EQ(CompareOp::kNever, sampler->GetCompareOp());
 }
 
 TEST_F(AmberScriptParserTest, SamplerCustomValues) {
@@ -57,7 +59,9 @@ SAMPLER sampler MAG_FILTER linear \
   BORDER_COLOR float_opaque_white \
   MIN_LOD 2.5 \
   MAX_LOD 5.0 \
-  NORMALIZED_COORDS)";
+  NORMALIZED_COORDS \
+  COMPARE on \
+  COMPARE_OP greater)";
 
   Parser parser;
   Result r = parser.Parse(in);
@@ -81,6 +85,8 @@ SAMPLER sampler MAG_FILTER linear \
   EXPECT_EQ(2.5, sampler->GetMinLOD());
   EXPECT_EQ(5.0, sampler->GetMaxLOD());
   EXPECT_EQ(true, sampler->GetNormalizedCoords());
+  EXPECT_EQ(true, sampler->GetCompareEnable());
+  EXPECT_EQ(CompareOp::kGreater, sampler->GetCompareOp());
 }
 
 TEST_F(AmberScriptParserTest, SamplerUnexpectedParameter) {