3 files changed, 27 insertions, 0 deletions
diff --git a/tools/render-test/options.cpp b/tools/render-test/options.cpp
index a486c8b15..53f88b7a9 100644
--- a/tools/render-test/options.cpp
+++ b/tools/render-test/options.cpp
@@ -76,6 +76,22 @@ void parseOptions(int* argc, char** argv)
         {
             gOptions.mode = Mode::GLSLCrossCompile;
         }
+        else if( strcmp(arg, "-xslang") == 0 )
+        {
+            // This is an option that we want to pass along to Slang
+
+            if( argCursor == argEnd )
+            {
+                fprintf(stderr, "expected argument for '%s' option\n", arg);
+                exit(1);
+            }
+            if( gOptions.slangArgCount == kMaxSlangArgs )
+            {
+                fprintf(stderr, "maximum number of '%s' options exceeded (%d)\n", arg, kMaxSlangArgs);
+                exit(1);
+            }
+            gOptions.slangArgs[gOptions.slangArgCount++] = *argCursor++;
+        }
         else
         {
             fprintf(stderr, "unknown option '%s'\n", arg);
diff --git a/tools/render-test/options.h b/tools/render-test/options.h
index 0731a5dc9..fbc615d56 100644
--- a/tools/render-test/options.h
+++ b/tools/render-test/options.h
@@ -25,12 +25,21 @@ enum class Mode
     GLSLCrossCompile,
 };
 
+enum
+{
+    // maximum number of command-line arguments to pass along to slang
+    kMaxSlangArgs = 16,
+};
+
 struct Options
 {
     char const* appName = "render-test";
     char const* sourcePath = nullptr;
     char const* outputPath = nullptr;
     Mode mode = Mode::Slang;
+
+    char const* slangArgs[kMaxSlangArgs];
+    int slangArgCount = 0;
 };
 
 extern Options gOptions;
diff --git a/tools/render-test/slang-support.cpp b/tools/render-test/slang-support.cpp
index bec651e87..8db62ebef 100644
--- a/tools/render-test/slang-support.cpp
+++ b/tools/render-test/slang-support.cpp
@@ -35,6 +35,8 @@ struct SlangShaderCompilerWrapper : public ShaderCompiler
         }
         spAddPreprocessorDefine(slangRequest, langDefine, "1");
 
+        spProcessCommandLineArguments(slangRequest, &gOptions.slangArgs[0], gOptions.slangArgCount);
+
         int vertexTranslationUnit = 0;
         int fragmentTranslationUnit = 0;
         if( sourceLanguage == SLANG_SOURCE_LANGUAGE_GLSL )