BlurNode.h

//
// Copyright Contributors to the MaterialX Project
// SPDX-License-Identifier: Apache-2.0
//
 
#ifndef MATERIALX_BLURNODE_H
#define MATERIALX_BLURNODE_H
 
#include <MaterialXGenShader/Nodes/ConvolutionNode.h>
 
MATERIALX_NAMESPACE_BEGIN
 
class MX_GENSHADER_API BlurNode : public ConvolutionNode
{
  public:
    void emitFunctionDefinition(const ShaderNode& node, GenContext& context, ShaderStage& stage) const override;
    void emitFunctionCall(const ShaderNode& node, GenContext& context, ShaderStage& stage) const override;
 
  protected:
    BlurNode();
 
    virtual void emitSamplingFunctionDefinition(const ShaderNode& node, GenContext& context, ShaderStage& stage) const = 0;
 
    bool acceptsInputType(TypeDesc type) const override;
 
    void computeSampleOffsetStrings(const string& sampleSizeName, const string& offsetTypeString,
                                    unsigned int filterWidth, StringVec& offsetStrings) const override;
 
    virtual void outputSampleArray(const ShaderGenerator& shadergen, ShaderStage& stage, TypeDesc inputType,
                                   const string& sampleName, const StringVec& sampleStrings) const;
    [[deprecated]] void outputSampleArray(const ShaderGenerator& shadergen, ShaderStage& stage, const TypeDesc* inputType,
                                          const string& sampleName, const StringVec& sampleStrings) const 
    { 
        return outputSampleArray(shadergen, stage, *inputType, sampleName, sampleStrings);
    }
 
    static const string _sampleSizeFunctionUV;
    static const float _filterSize;
    static const float _filterOffset;
 
    static const string BOX_FILTER;
    static const string BOX_WEIGHTS_VARIABLE;
 
    static const string GAUSSIAN_FILTER;
    static const string GAUSSIAN_WEIGHTS_VARIABLE;
 
    static const string FILTER_LIST;
 
    static const string IN_STRING;
    static const string FILTER_TYPE_STRING;
    static const string FILTER_SIZE_STRING;
};
 
MATERIALX_NAMESPACE_END
 
#endif