template<typename ExprT, typename VariableT>
class ImFusion::ImageMath::internal::StashTpl< ExprT, VariableT >
ImageMath class that can be used to substitute a multi-channel expression into another expression Typically, the expression being substituted is "expensive" relative to the "cheap" expression being substituted into.
The prototypical example is expr/length(expr). Here the map x -> x/length(x) is "cheap" to evaluate, but relies on x being evaluated multiple times, which is expensive if an expression is substituted for x. This class "stashes" the evaluation of the expensive expression for all channels, and only then evaluates the "cheap" expression on the result. The example of the map x -> x/length(x) can be realized in the following way:
auto expensiveExpr = ....
auto cheapExpr = var/var.length();
auto normalized = StashTpl<decltype(expr),decltype(var)>(expr,var);
Helper Variable class for use with stashes.
Definition StashTpl.h:26
- See also
- also ExprBaseTpl::stashThenApply
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| StashTpl (const ExprT &expensiveExpression, const VariableT &cheapExpression) |
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| StashTpl (const StashTpl &other) |
| | Copy-constructor in order to rerun the variable substitution.
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template<typename ImgT> |
| auto | convertToMemImgExpr () const noexcept |
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auto | convertToSharedImgExpr (std::size_t index) const |
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template<typename SubOperandT> |
| auto | substituteVariable (const SubOperandT &operand) const |
| | Substitutes any Variable leaf.
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IMFUSION_STRONG_INLINE expr_type | eval (const std::size_t i, const vec4i &coord) const |
| GlExprInterface & | expensiveExpression () override |
| const GlExprInterface & | expensiveExpression () const override |
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const ExprT & | expensiveExpressionRaw () const |
| GlExprInterface & | cheapExpression () override |
| const GlExprInterface & | cheapExpression () const override |
| ImageDescriptor | imgDesc () const override |
| | Return ImageDescriptor of this expression. This reference is expected to remain the same while the class exists.
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| int | numImgs () const override |
| | Return number of images of this expression.
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| DeviceStrategy | deviceStrategy () const override |
| | Return DeviceStrategy of this expression.
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const auto & | get () const |
| | get a const reference to this with the actual type
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| auto | polyWrapper () const |
| auto | uniquePolyWrapper () const |
| auto | sharedPolyWrapper () const |
| auto | binaryOp (const ExprBaseTpl< RhsT > &rhs, const Op &func=Op()) const |
| auto | unaryOp (const Op &func=Op()) const |
| reduction_type | reduce (std::vector< vec4i > *arg=nullptr) const |
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auto | forceCPU () const |
| | Forces CPU execution.
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auto | forceGPU () const |
| | Forces GPU execution.
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| auto | channelSwizzle (const std::vector< std::size_t > &indices) const |
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auto | head () |
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| ADD_SPECIAL_SWIZZLE (x, {0}) |
| auto | streamChannels (int numStreamedChannels) const |
| auto | substituteVariableWithImg (T &img) const |
| auto | operator- () const |
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auto | cast () const |
| auto | storageToOriginal (const ImageDescriptor &desc) |
| | Apply shift/scale to the operand,.
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| auto | originalToStorage (const ImageDescriptor &desc) |
| | Apply shift/scale to the operand,.
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auto | channelReduction () |
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| ADD_CHANNEL_REDUCTION_OPERATOR (channelSum, add) |
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auto | channelMean () |
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auto | squaredLength () const |
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auto | channelDistance (const ExprBaseTpl< RhsT > &other) const |
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auto | dot (const ExprBaseTpl< RhsT > &other) const |
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auto | stashThenApply (const ExprBaseTpl< VariableT > &varExpr) const |
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auto | hnormalized () const |
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auto | normalized () const |
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auto | homogeneous () const |
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auto | appendZero () const |
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auto | select (const ExprBaseTpl< LhsT > &lhs, const ExprBaseTpl< RhsT > &rhs) const |
| | Ternary (condition.x ? if_true : if_false) operator.
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| ADD_REDUCTION_OPERATOR (sum, add) |
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| ADD_ARG_REDUCTION_OPERATOR (min, min) |
| Eigen::Matrix< double, Eigen::Dynamic, 1 > | mean () const |
| Eigen::Matrix< double, Eigen::Dynamic, 1 > | l1Norm () const |
| Eigen::Matrix< double, Eigen::Dynamic, 1 > | squaredl2Norm () const |
| Eigen::Matrix< double, Eigen::Dynamic, 1 > | l2Norm () const |
| Eigen::Matrix< double, Eigen::Dynamic, 1 > | lpNorm (double p) const |
| Eigen::Matrix< double, Eigen::Dynamic, 1 > | lInfNorm () const |
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auto | evaluateIntoImage (bool clearShiftScale=false) const |
| | Create an empty image and evaluate this expression into it.
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auto | toMask () const |
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auto | toDeformation (const ImageDescriptorWorld imgDesc) const |
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auto | resample (const ImageDescriptorWorld &inputDesc, const ImageDescriptorWorld &outputDesc) const |
| std::string | evalString (bool tagAndAssign=true) const override |
| | Print expression.
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| void | tagAndAssignNames (std::unordered_map< internal::TaggingIndex, const void * > &taggedLeaves, std::unordered_map< std::type_index, int > &countPerLeafType, const std::string &prefix) const override |
| | We need to tag leaves and tell unique leaves that they are responsible to define the uniforms and set the shader arguments.
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| void | getUniformDefinitionList (std::string &definitionList, const std::vector< int > &indices, const std::string &prefix) const override |
| | Collect uniform/sampler definitions.
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| void | getVariableDefinitionList (std::string &definitionList, const std::vector< int > &indices, const std::string &prefix) const override |
| | Collect variable definitions.
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| int | setArguments (GL::Program &p, const std::vector< int > &indices, const std::string &prefix) const override |
| | Set uniform/sampler arguments.
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| std::vector< GlExprInterface * > | children () override |
| | Used for traversing the expression tree. Contains the immediate children of node.
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| std::vector< const GlExprInterface * > | children () const override |
| | Used for traversing the expression tree. Contains the immediate children of node.
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ExprInterface & | exprInterface () |
| | Get image descriptor of the wrapped expression.
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const ExprInterface & | exprInterface () const |
| virtual bool | setMagFilter (ImageMath::MagFilter mag) |
| | Set interpolation behaviour of the current leaf (only).
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| virtual bool | setWrap (ImageMath::Wrap wrap) |
| | Set interpolation behaviour of the current leaf (only).
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| bool | setMagFilterRecursive (ImageMath::MagFilter mag) |
| | Set interpolation behaviour of the current leaf and all of its children.
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| bool | setWrapRecursive (ImageMath::Wrap wrap) |
| | Set wrap behaviour of the current leaf and all of its children.
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