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290 lines
9.4 KiB
290 lines
9.4 KiB
4 months ago
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#ifndef _RSGEXPRESSION_HPP
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#define _RSGEXPRESSION_HPP
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/*-------------------------------------------------------------------------
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* drawElements Quality Program Random Shader Generator
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* ----------------------------------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Expressions.
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*
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* Creating expressions:
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* + Children must be created in in reverse evaluation order.
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* - Must be tokenized / evaluated taking that order in account.
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*
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* Evaluation:
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* + Done recursively. (Do we have enough stack?)
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* + R-values: Nodes must implement getValue() in some way. Value
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* must be valid after evaluate().
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* + L-values: Valid writable value access proxy must be returned after
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* evaluate().
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*//*--------------------------------------------------------------------*/
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#include "rsgDefs.hpp"
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#include "rsgGeneratorState.hpp"
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#include "rsgVariableValue.hpp"
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#include "rsgVariable.hpp"
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#include "rsgVariableManager.hpp"
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#include "rsgExecutionContext.hpp"
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namespace rsg
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{
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// \todo [2011-06-10 pyry] Declare in ShaderParameters?
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const float unusedValueWeight = 0.05f;
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class Expression
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{
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public:
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virtual ~Expression (void);
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// Shader generation API
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virtual Expression* createNextChild (GeneratorState& state) = DE_NULL;
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virtual void tokenize (GeneratorState& state, TokenStream& str) const = DE_NULL;
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// Execution API
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virtual void evaluate (ExecutionContext& ctx) = DE_NULL;
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virtual ExecConstValueAccess getValue (void) const = DE_NULL;
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virtual ExecValueAccess getLValue (void) const { DE_ASSERT(DE_FALSE); throw Exception("Expression::getLValue(): not L-value node"); }
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static Expression* createRandom (GeneratorState& state, ConstValueRangeAccess valueRange);
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static Expression* createRandomLValue (GeneratorState& state, ConstValueRangeAccess valueRange);
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};
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class VariableAccess : public Expression
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{
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public:
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virtual ~VariableAccess (void) {}
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Expression* createNextChild (GeneratorState& state) { DE_UNREF(state); return DE_NULL; }
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void tokenize (GeneratorState& state, TokenStream& str) const { DE_UNREF(state); str << Token(m_variable->getName()); }
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void evaluate (ExecutionContext& ctx);
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ExecConstValueAccess getValue (void) const { return m_valueAccess; }
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ExecValueAccess getLValue (void) const { return m_valueAccess; }
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protected:
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VariableAccess (void) : m_variable(DE_NULL) {}
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const Variable* m_variable;
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ExecValueAccess m_valueAccess;
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};
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class VariableRead : public VariableAccess
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{
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public:
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VariableRead (GeneratorState& state, ConstValueRangeAccess valueRange);
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VariableRead (const Variable* variable);
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virtual ~VariableRead (void) {}
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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};
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class VariableWrite : public VariableAccess
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{
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public:
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VariableWrite (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~VariableWrite (void) {}
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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};
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class FloatLiteral : public Expression
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{
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public:
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FloatLiteral (GeneratorState& state, ConstValueRangeAccess valueRange);
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FloatLiteral (float customValue);
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virtual ~FloatLiteral (void) {}
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Expression* createNextChild (GeneratorState& state) { DE_UNREF(state); return DE_NULL; }
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& ctx) { DE_UNREF(ctx); }
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ExecConstValueAccess getValue (void) const { return m_value.getValue(VariableType::getScalarType(VariableType::TYPE_FLOAT)); }
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private:
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ExecValueStorage m_value;
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};
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class IntLiteral : public Expression
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{
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public:
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IntLiteral (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~IntLiteral (void) {}
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Expression* createNextChild (GeneratorState& state) { DE_UNREF(state); return DE_NULL; }
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& ctx) { DE_UNREF(ctx); }
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ExecConstValueAccess getValue (void) const { return m_value.getValue(VariableType::getScalarType(VariableType::TYPE_INT)); }
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private:
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ExecValueStorage m_value;
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};
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class BoolLiteral : public Expression
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{
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public:
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BoolLiteral (GeneratorState& state, ConstValueRangeAccess valueRange);
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BoolLiteral (bool customValue);
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virtual ~BoolLiteral (void) {}
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Expression* createNextChild (GeneratorState& state) { DE_UNREF(state); return DE_NULL; }
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& ctx) { DE_UNREF(ctx); }
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ExecConstValueAccess getValue (void) const { return m_value.getValue(VariableType::getScalarType(VariableType::TYPE_BOOL)); }
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private:
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ExecValueStorage m_value;
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};
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class ConstructorOp : public Expression
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{
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public:
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ConstructorOp (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~ConstructorOp (void);
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Expression* createNextChild (GeneratorState& state);
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& ctx);
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ExecConstValueAccess getValue (void) const { return m_value.getValue(m_valueRange.getType()); }
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private:
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ValueRange m_valueRange;
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ExecValueStorage m_value;
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std::vector<ValueRange> m_inputValueRanges;
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std::vector<Expression*> m_inputExpressions;
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};
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class AssignOp : public Expression
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{
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public:
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AssignOp (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~AssignOp (void);
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Expression* createNextChild (GeneratorState& state);
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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// \todo [2011-02-28 pyry] LValue variant of AssignOp
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// static float getLValueWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& ctx);
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ExecConstValueAccess getValue (void) const { return m_value.getValue(m_valueRange.getType()); }
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private:
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ValueRange m_valueRange;
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ExecValueStorage m_value;
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Expression* m_lvalueExpr;
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Expression* m_rvalueExpr;
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};
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class ParenOp : public Expression
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{
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public:
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ParenOp (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~ParenOp (void);
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Expression* createNextChild (GeneratorState& state);
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void tokenize (GeneratorState& state, TokenStream& str) const;
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void setChild (Expression* expression);
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& execCtx) { m_child->evaluate(execCtx); }
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ExecConstValueAccess getValue (void) const { return m_child->getValue(); }
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private:
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ValueRange m_valueRange;
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Expression* m_child;
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};
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class SwizzleOp : public Expression
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{
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public:
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SwizzleOp (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~SwizzleOp (void);
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Expression* createNextChild (GeneratorState& state);
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& execCtx);
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ExecConstValueAccess getValue (void) const { return m_value.getValue(m_outValueRange.getType()); }
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private:
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ValueRange m_outValueRange;
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int m_numInputElements;
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deUint8 m_swizzle[4];
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Expression* m_child;
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ExecValueStorage m_value;
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};
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class TexLookup : public Expression
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{
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public:
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TexLookup (GeneratorState& state, ConstValueRangeAccess valueRange);
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virtual ~TexLookup (void);
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Expression* createNextChild (GeneratorState& state);
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void tokenize (GeneratorState& state, TokenStream& str) const;
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static float getWeight (const GeneratorState& state, ConstValueRangeAccess valueRange);
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void evaluate (ExecutionContext& execCtx);
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ExecConstValueAccess getValue (void) const { return m_value.getValue(m_valueType); }
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private:
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enum Type
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{
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TYPE_TEXTURE2D,
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TYPE_TEXTURE2D_LOD,
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TYPE_TEXTURE2D_PROJ,
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TYPE_TEXTURE2D_PROJ_LOD,
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TYPE_TEXTURECUBE,
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TYPE_TEXTURECUBE_LOD,
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TYPE_LAST
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};
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Type m_type;
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const Variable* m_sampler;
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Expression* m_coordExpr;
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Expression* m_lodBiasExpr;
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VariableType m_valueType;
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ExecValueStorage m_value;
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};
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} // rsg
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#endif // _RSGEXPRESSION_HPP
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