HwHeightToNormalNode.h

//
// Copyright Contributors to the MaterialX Project
// SPDX-License-Identifier: Apache-2.0
//
 
#ifndef MATERIALX_HWHEIGHTTONORMALNODE_H
#define MATERIALX_HWHEIGHTTONORMALNODE_H
 
#include <MaterialXGenShader/HwShaderGenerator.h>
 
#include <MaterialXGenShader/Nodes/ConvolutionNode.h>
 
MATERIALX_NAMESPACE_BEGIN

class MX_GENSHADER_API HwHeightToNormalNode : public ConvolutionNode
{
  public:
    HwHeightToNormalNode(const string& samplingIncludeFilename) : _samplingIncludeFilename(samplingIncludeFilename) {}
    virtual ~HwHeightToNormalNode() {}
 
    static ShaderNodeImplPtr create(const string& samplingIncludeFilename);
 
    void createVariables(const ShaderNode&, GenContext&, Shader& shader) const override;
 
    void emitFunctionDefinition(const ShaderNode& node, GenContext& context, ShaderStage& stage) const override;
    void emitFunctionCall(const ShaderNode& node, GenContext& context, ShaderStage& stage) const override;
 
  protected:
    bool acceptsInputType(TypeDesc type) const override;

    void computeSampleOffsetStrings(const string& sampleSizeName, const string& offsetTypeString,
                                    unsigned int filterWidth, StringVec& offsetStrings) const override;
 
  private:
    const string _samplingIncludeFilename;
};
 
MATERIALX_NAMESPACE_END
 
#endif