From fcf83dbf9effab3bd98bad2b83b2468b7eb05cfd Mon Sep 17 00:00:00 2001
From: Tim Foley <tfoley@nvidia.com>
Date: Fri, 9 Jun 2017 11:34:21 -0700
Subject: Initial import of code.

---
 tools/render-test/slang-support.cpp | 84 +++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 tools/render-test/slang-support.cpp

(limited to 'tools/render-test/slang-support.cpp')

diff --git a/tools/render-test/slang-support.cpp b/tools/render-test/slang-support.cpp
new file mode 100644
index 000000000..5aafc562e
--- /dev/null
+++ b/tools/render-test/slang-support.cpp
@@ -0,0 +1,84 @@
+// slang-support.cpp
+
+#define SLANG_INCLUDE_IMPLEMENTATION
+
+#include "slang-support.h"
+
+#include <stdio.h>
+
+namespace renderer_test {
+
+struct SlangShaderCompilerWrapper : public ShaderCompiler
+{
+    ShaderCompiler*     innerCompiler;
+    SlangCompileTarget  target;
+
+    virtual ShaderProgram* compileProgram(ShaderCompileRequest const& request) override
+    {
+        SlangSession* slangSession = spCreateSession(NULL);
+        SlangCompileRequest* slangRequest = spCreateCompileRequest(slangSession);
+
+        spSetCodeGenTarget(slangRequest, target);
+
+        int translationUnitIndex = spAddTranslationUnit(slangRequest, SLANG_SOURCE_LANGUAGE_SLANG, nullptr);
+
+        spAddTranslationUnitSourceString(slangRequest, translationUnitIndex, request.source.path, request.source.text);
+
+        int vertexEntryPoint = spAddTranslationUnitEntryPoint(slangRequest, translationUnitIndex, request.vertexShader.name,   spFindProfile(slangSession, request.vertexShader.profile));
+        int fragmentEntryPoint = spAddTranslationUnitEntryPoint(slangRequest, translationUnitIndex, request.fragmentShader.name, spFindProfile(slangSession, request.fragmentShader.profile));
+
+        int compileErr = spCompile(slangRequest);
+        if(auto diagnostics = spGetDiagnosticOutput(slangRequest))
+        {
+            // TODO(tfoley): re-enable when I get a logging solution in place
+//            OutputDebugStringA(diagnostics);
+            fprintf(stderr, "%s", diagnostics);
+        }
+        if(compileErr)
+        {
+            return nullptr;
+        }
+
+        char const* translatedCode = spGetTranslationUnitSource(slangRequest, translationUnitIndex);
+        char const* vertexCode = spGetEntryPointSource(slangRequest, translationUnitIndex, vertexEntryPoint);
+        char const* fragmentCode = spGetEntryPointSource(slangRequest, translationUnitIndex, fragmentEntryPoint);
+
+        ShaderCompileRequest innerRequest = request;
+        innerRequest.source.text = translatedCode;
+        innerRequest.vertexShader.source.text = vertexCode;
+        innerRequest.fragmentShader.source.text = fragmentCode;
+
+
+        auto result = innerCompiler->compileProgram(innerRequest);
+
+        // We clean up the Slang compilation context and result *after*
+        // we have run the downstream compiler, because Slang
+        // owns the memory allocation for the generated text, and will
+        // free it when we destroy the compilation result.
+        spDestroyCompileRequest(slangRequest);
+        spDestroySession(slangSession);
+
+        return result;
+    }
+};
+
+ShaderCompiler* createSlangShaderCompiler(ShaderCompiler* innerCompiler, SlangCompileTarget target)
+{
+    auto result = new SlangShaderCompilerWrapper();
+    result->innerCompiler = innerCompiler;
+    result->target = target;
+
+    return result;
+
+}
+
+
+} // renderer_test
+
+//
+// In order to actually use Slang in our application, we need to link in its
+// implementation. The easiest way to accomplish this is by directly inlcuding
+// the (concatenated) Slang source code into our app.
+//
+
+#include <slang.h>
-- 
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