113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
// Copyright (C) 2020 Jérôme Leclercq
|
|
// This file is part of the "Nazara Engine - Renderer module"
|
|
// For conditions of distribution and use, see copyright notice in Config.hpp
|
|
|
|
#pragma once
|
|
|
|
#ifndef NAZARA_GLSLWRITER_HPP
|
|
#define NAZARA_GLSLWRITER_HPP
|
|
|
|
#include <Nazara/Prerequisites.hpp>
|
|
#include <Nazara/Shader/Config.hpp>
|
|
#include <Nazara/Shader/ShaderAst.hpp>
|
|
#include <Nazara/Shader/ShaderVarVisitor.hpp>
|
|
#include <Nazara/Shader/ShaderAstVisitor.hpp>
|
|
#include <Nazara/Shader/ShaderWriter.hpp>
|
|
#include <set>
|
|
#include <sstream>
|
|
#include <string>
|
|
|
|
namespace Nz
|
|
{
|
|
class NAZARA_SHADER_API GlslWriter : public ShaderWriter, public ShaderVarVisitor, public ShaderAstVisitor
|
|
{
|
|
public:
|
|
struct Environment;
|
|
using ExtSupportCallback = std::function<bool(const std::string_view& name)>;
|
|
|
|
GlslWriter();
|
|
GlslWriter(const GlslWriter&) = delete;
|
|
GlslWriter(GlslWriter&&) = delete;
|
|
~GlslWriter() = default;
|
|
|
|
std::string Generate(const ShaderAst& shader, const States& conditions = {});
|
|
|
|
void SetEnv(Environment environment);
|
|
|
|
struct Environment
|
|
{
|
|
ExtSupportCallback extCallback;
|
|
unsigned int glMajorVersion = 3;
|
|
unsigned int glMinorVersion = 0;
|
|
bool glES = false;
|
|
bool flipYPosition = false;
|
|
};
|
|
|
|
private:
|
|
void Append(ShaderExpressionType type);
|
|
void Append(ShaderNodes::BuiltinEntry builtin);
|
|
void Append(ShaderNodes::BasicType type);
|
|
void Append(ShaderNodes::MemoryLayout layout);
|
|
template<typename T> void Append(const T& param);
|
|
void AppendCommentSection(const std::string& section);
|
|
void AppendField(const std::string& structName, std::size_t* memberIndex, std::size_t remainingMembers);
|
|
void AppendFunction(const ShaderAst::Function& func);
|
|
void AppendFunctionPrototype(const ShaderAst::Function& func);
|
|
void AppendLine(const std::string& txt = {});
|
|
|
|
template<typename T> void DeclareVariables(const ShaderAst& shader, const std::vector<T>& variables, const std::string& keyword = {}, const std::string& section = {});
|
|
|
|
void EnterScope();
|
|
void LeaveScope();
|
|
|
|
using ShaderVarVisitor::Visit;
|
|
using ShaderAstVisitor::Visit;
|
|
void Visit(ShaderNodes::ExpressionPtr& expr, bool encloseIfRequired = false);
|
|
void Visit(ShaderNodes::AccessMember& node) override;
|
|
void Visit(ShaderNodes::AssignOp& node) override;
|
|
void Visit(ShaderNodes::Branch& node) override;
|
|
void Visit(ShaderNodes::BinaryOp& node) override;
|
|
void Visit(ShaderNodes::BuiltinVariable& var) override;
|
|
void Visit(ShaderNodes::Cast& node) override;
|
|
void Visit(ShaderNodes::ConditionalExpression& node) override;
|
|
void Visit(ShaderNodes::ConditionalStatement& node) override;
|
|
void Visit(ShaderNodes::Constant& node) override;
|
|
void Visit(ShaderNodes::DeclareVariable& node) override;
|
|
void Visit(ShaderNodes::ExpressionStatement& node) override;
|
|
void Visit(ShaderNodes::Identifier& node) override;
|
|
void Visit(ShaderNodes::InputVariable& var) override;
|
|
void Visit(ShaderNodes::IntrinsicCall& node) override;
|
|
void Visit(ShaderNodes::LocalVariable& var) override;
|
|
void Visit(ShaderNodes::ParameterVariable& var) override;
|
|
void Visit(ShaderNodes::OutputVariable& var) override;
|
|
void Visit(ShaderNodes::Sample2D& node) override;
|
|
void Visit(ShaderNodes::StatementBlock& node) override;
|
|
void Visit(ShaderNodes::SwizzleOp& node) override;
|
|
void Visit(ShaderNodes::UniformVariable& var) override;
|
|
|
|
static bool HasExplicitBinding(const ShaderAst& shader);
|
|
static bool HasExplicitLocation(const ShaderAst& shader);
|
|
|
|
struct Context
|
|
{
|
|
const ShaderAst* shader = nullptr;
|
|
const ShaderAst::Function* currentFunction = nullptr;
|
|
const States* states = nullptr;
|
|
};
|
|
|
|
struct State
|
|
{
|
|
std::stringstream stream;
|
|
unsigned int indentLevel = 0;
|
|
};
|
|
|
|
Context m_context;
|
|
Environment m_environment;
|
|
State* m_currentState;
|
|
};
|
|
}
|
|
|
|
#include <Nazara/Shader/GlslWriter.inl>
|
|
|
|
#endif // NAZARA_GLSLWRITER_HPP
|