SkSL::RP::LValue Class Reference

Inheritance diagram for SkSL::RP::LValue:

Public Member Functions
virtual	~LValue ()=default
virtual bool	isWritable () const =0
virtual SlotRange	fixedSlotRange (Generator *gen)=0
virtual AutoStack *	dynamicSlotRange ()=0
virtual SkSpan< const int8_t >	swizzle ()
virtual bool	push (Generator *gen, SlotRange fixedOffset, AutoStack *dynamicOffset, SkSpan< const int8_t > swizzle)=0
virtual bool	store (Generator *gen, SlotRange fixedOffset, AutoStack *dynamicOffset, SkSpan< const int8_t > swizzle)=0

Public Attributes
std::unique_ptr< Expression >	fScratchExpression

Detailed Description

Definition at line 673 of file SkSLRasterPipelineCodeGenerator.cpp.

Constructor & Destructor Documentation

~LValue()

virtual SkSL::RP::LValue::~LValue ( )

virtualdefault

Member Function Documentation

dynamicSlotRange()

virtual AutoStack * SkSL::RP::LValue::dynamicSlotRange ( )

pure virtual

Returns a stack which holds a single integer, representing the dynamic offset of the lvalue. This value does not incorporate the fixed offset. If null is returned, the lvalue doesn't have a dynamic offset. evaluateDynamicIndices must be called before this is used.

Implemented in SkSL::RP::ScratchLValue, SkSL::RP::VariableLValue, SkSL::RP::ImmutableLValue, SkSL::RP::SwizzleLValue, SkSL::RP::UnownedLValueSlice, and SkSL::RP::DynamicIndexLValue.

fixedSlotRange()

virtual SlotRange SkSL::RP::LValue::fixedSlotRange ( Generator *  gen )

pure virtual

Returns the fixed slot range of the lvalue, after it is winnowed down to the selected field/index. The range is calculated assuming every dynamic index will evaluate to zero.

Implemented in SkSL::RP::ScratchLValue, SkSL::RP::VariableLValue, SkSL::RP::ImmutableLValue, SkSL::RP::SwizzleLValue, SkSL::RP::UnownedLValueSlice, and SkSL::RP::DynamicIndexLValue.

isWritable()

virtual bool SkSL::RP::LValue::isWritable ( ) const

pure virtual

Returns true if this lvalue is actually writable–temporaries and uniforms are not.

Implemented in SkSL::RP::ScratchLValue, SkSL::RP::VariableLValue, SkSL::RP::ImmutableLValue, SkSL::RP::SwizzleLValue, SkSL::RP::UnownedLValueSlice, and SkSL::RP::DynamicIndexLValue.

push()

virtual bool SkSL::RP::LValue::push ( Generator *  gen, SlotRange  fixedOffset, AutoStack *  dynamicOffset, SkSpan< const int8_t >  swizzle  )

pure virtual

Pushes values directly onto the stack.

Implemented in SkSL::RP::ScratchLValue, SkSL::RP::VariableLValue, SkSL::RP::ImmutableLValue, SkSL::RP::SwizzleLValue, SkSL::RP::UnownedLValueSlice, and SkSL::RP::DynamicIndexLValue.

store()

virtual bool SkSL::RP::LValue::store ( Generator *  gen, SlotRange  fixedOffset, AutoStack *  dynamicOffset, SkSpan< const int8_t >  swizzle  )

pure virtual

Stores topmost values from the stack directly into the lvalue.

Implemented in SkSL::RP::ScratchLValue, SkSL::RP::VariableLValue, SkSL::RP::ImmutableLValue, SkSL::RP::SwizzleLValue, SkSL::RP::UnownedLValueSlice, and SkSL::RP::DynamicIndexLValue.

swizzle()

virtual SkSpan< const int8_t > SkSL::RP::LValue::swizzle ( )

inlinevirtual

Returns the swizzle components of the lvalue, or an empty span for non-swizzle LValues.

Reimplemented in SkSL::RP::SwizzleLValue.

Definition at line 694 of file SkSLRasterPipelineCodeGenerator.cpp.

{ return {}; }

Member Data Documentation

fScratchExpression

std::unique_ptr<Expression> SkSL::RP::LValue::fScratchExpression

Some lvalues refer to a temporary expression; these temps can be held in the scratch-expression field to ensure that they exist for the lifetime of the lvalue.

Definition at line 711 of file SkSLRasterPipelineCodeGenerator.cpp.

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The documentation for this class was generated from the following file:

• third_party/skia/src/sksl/codegen/SkSLRasterPipelineCodeGenerator.cpp