Add pybind11 bindings for Slang generator.

Author: kwokcb

.github/workflows/main.yml

@@ -229,6 +229,7 @@ jobs:
         python Scripts/generateshader.py ../resources/Materials/Examples/StandardSurface --target osl
         python Scripts/generateshader.py ../resources/Materials/Examples/StandardSurface --target mdl
         python Scripts/generateshader.py ../resources/Materials/Examples/StandardSurface --target msl
+        python Scripts/generateshader.py ../resources/Materials/Examples/StandardSurface --target slang
       working-directory: python
 
     - name: Shader Validation Tests (Windows)

python/Scripts/generateshader.py

@@ -11,6 +11,7 @@
 import MaterialX.PyMaterialXGenMdl as mx_gen_mdl
 import MaterialX.PyMaterialXGenMsl as mx_gen_msl
 import MaterialX.PyMaterialXGenOsl as mx_gen_osl
+import MaterialX.PyMaterialXGenSlang as mx_gen_slang
 import MaterialX.PyMaterialXGenShader as mx_gen_shader
 
 def validateCode(sourceCodeFile, codevalidator, codevalidatorArgs):
@@ -102,6 +103,8 @@ def main():
             shadergen = mx_gen_glsl.WgslShaderGenerator.create()
         elif gentarget == 'msl':
             shadergen = mx_gen_msl.MslShaderGenerator.create()
+        elif gentarget == 'slang':
+            shadergen = mx_gen_slang.SlangShaderGenerator.create()
         else:
             shadergen = mx_gen_glsl.GlslShaderGenerator.create()
 

source/PyMaterialX/CMakeLists.txt

@@ -37,7 +37,7 @@ endif()
 
 add_subdirectory(PyMaterialXCore)
 add_subdirectory(PyMaterialXFormat)
-if (MATERIALX_BUILD_GEN_GLSL OR MATERIALX_BUILD_GEN_OSL OR MATERIALX_BUILD_GEN_MDL OR MATERIALX_BUILD_GEN_MSL)
+if (MATERIALX_BUILD_GEN_GLSL OR MATERIALX_BUILD_GEN_OSL OR MATERIALX_BUILD_GEN_MDL OR MATERIALX_BUILD_GEN_MSL OR MATERIALX_BUILD_GEN_SLANG)
     add_subdirectory(PyMaterialXGenShader)
     if (MATERIALX_BUILD_GEN_GLSL)
         add_subdirectory(PyMaterialXGenGlsl)
@@ -51,6 +51,9 @@ if (MATERIALX_BUILD_GEN_GLSL OR MATERIALX_BUILD_GEN_OSL OR MATERIALX_BUILD_GEN_M
     if (MATERIALX_BUILD_GEN_MDL)
         add_subdirectory(PyMaterialXGenMdl)
     endif()
+    if (MATERIALX_BUILD_GEN_SLANG)
+        add_subdirectory(PyMaterialXGenSlang)
+    endif()
 endif()
 if (MATERIALX_BUILD_RENDER)
     add_subdirectory(PyMaterialXRender)

source/PyMaterialX/PyMaterialXGenSlang/CMakeLists.txt

@@ -0,0 +1,26 @@
+file(GLOB pymaterialxgenslang_source "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp")
+file(GLOB pymaterialxgenslang_headers "${CMAKE_CURRENT_SOURCE_DIR}/*.h")
+
+pybind11_add_module(PyMaterialXGenSlang SHARED ${PYBIND11_MODULE_FLAGS} ${pymaterialxgenslang_source} ${pymaterialxgenslang_headers})
+
+if(APPLE)
+    set_target_properties(PyMaterialXGenSlang PROPERTIES CXX_VISIBILITY_PRESET "default")
+endif()
+
+set_target_properties(
+    PyMaterialXGenSlang
+    PROPERTIES
+    OUTPUT_NAME PyMaterialXGenSlang
+    COMPILE_FLAGS "${EXTERNAL_COMPILE_FLAGS}"
+    LINK_FLAGS "${EXTERNAL_LINK_FLAGS}"
+    INSTALL_RPATH "${MATERIALX_UP_TWO_RPATH}"
+    DEBUG_POSTFIX "${MATERIALX_PYTHON_DEBUG_POSTFIX}")
+
+target_link_libraries(
+    PyMaterialXGenSlang
+    PUBLIC PyMaterialXGenShader
+           MaterialXGenSlang
+    PRIVATE ${CMAKE_DL_LIBS})
+
+install(TARGETS PyMaterialXGenSlang
+        DESTINATION "${MATERIALX_PYTHON_FOLDER_NAME}")

source/PyMaterialX/PyMaterialXGenSlang/PyModule.cpp

@@ -0,0 +1,20 @@
+//
+// Copyright Contributors to the MaterialX Project
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include <PyMaterialX/PyMaterialX.h>
+
+namespace py = pybind11;
+
+void bindPySlangShaderGenerator(py::module& mod);
+
+PYBIND11_MODULE(PyMaterialXGenSlang, mod)
+{
+    mod.doc() = "Shader generation using the Slang shading language.";
+
+    // PyMaterialXGenSlang depends on types defined in PyMaterialXGenShader
+    PYMATERIALX_IMPORT_MODULE(PyMaterialXGenShader);
+
+    bindPySlangShaderGenerator(mod);
+}

source/PyMaterialX/PyMaterialXGenSlang/PySlangShaderGenerator.cpp

@@ -0,0 +1,33 @@
+//
+// Copyright Contributors to the MaterialX Project
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include <PyMaterialX/PyMaterialX.h>
+
+#include <MaterialXGenSlang/SlangShaderGenerator.h>
+#include <MaterialXGenShader/Shader.h>
+#include <MaterialXGenShader/ShaderGenerator.h>
+
+namespace py = pybind11;
+namespace mx = MaterialX;
+
+// Slang shader generator bindings
+
+namespace
+{
+    // Creator wrapper to avoid having to expose the TypeSystem class in python
+    mx::ShaderGeneratorPtr SlangShaderGenerator_create()
+    {
+        return mx::SlangShaderGenerator::create();
+    }
+}
+
+void bindPySlangShaderGenerator(py::module& mod)
+{
+    py::class_<mx::SlangShaderGenerator, mx::HwShaderGenerator, mx::SlangShaderGeneratorPtr>(mod, "SlangShaderGenerator")
+        .def_static("create", &SlangShaderGenerator_create)
+        .def("generate", &mx::SlangShaderGenerator::generate)
+        .def("getTarget", &mx::SlangShaderGenerator::getTarget)
+        .def("getVersion", &mx::SlangShaderGenerator::getVersion);
+}