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Shader/GlslWriter: Improve GLSL readability

This commit is contained in:
Jérôme Leclercq 2021-04-14 20:10:11 +02:00
parent a90937eb4f
commit 0860a0689f
2 changed files with 23 additions and 17 deletions
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1
include/Nazara/Shader/GlslWriter.hpp
View File

@ -64,6 +64,7 @@ namespace Nz
void AppendHeader();
void AppendLine(const std::string& txt = {});
template<typename... Args> void AppendLine(Args&&... params);
void AppendStatementList(std::vector<ShaderAst::StatementPtr>& statements);
void EnterScope();
void LeaveScope(bool skipLine = true);

39
src/Nazara/Shader/GlslWriter.cpp
View File

@ -311,6 +311,20 @@ namespace Nz
AppendLine();
}
void GlslWriter::AppendStatementList(std::vector<ShaderAst::StatementPtr>& statements)
{
bool first = true;
for (const ShaderAst::StatementPtr& statement : statements)
{
if (!first && statement->GetType() != ShaderAst::NodeType::NoOpStatement)
AppendLine();
statement->Visit(*this);
first = false;
}
}
void GlslWriter::EnterScope()
{
NazaraAssert(m_currentState, "This function should only be called while processing an AST");
@ -361,8 +375,7 @@ namespace Nz
// Output struct is handled on return node
m_currentState->isInEntryPoint = true;
for (auto& statement : node.statements)
statement->Visit(*this);
AppendStatementList(node.statements);
m_currentState->isInEntryPoint = false;
}
@ -711,8 +724,7 @@ namespace Nz
EnterScope();
{
for (auto& statement : node.statements)
statement->Visit(*this);
AppendStatementList(node.statements);
}
LeaveScope();
}
@ -758,7 +770,7 @@ namespace Nz
node.initialExpression->Visit(*this);
}
AppendLine(";");
Append(";");
}
void GlslWriter::Visit(ShaderAst::DiscardStatement& /*node*/)
@ -769,7 +781,7 @@ namespace Nz
void GlslWriter::Visit(ShaderAst::ExpressionStatement& node)
{
node.expression->Visit(*this);
AppendLine(";");
Append(";");
}
void GlslWriter::Visit(ShaderAst::IntrinsicExpression& node)
@ -802,16 +814,7 @@ namespace Nz
void GlslWriter::Visit(ShaderAst::MultiStatement& node)
{
bool first = true;
for (const ShaderAst::StatementPtr& statement : node.statements)
{
if (!first && statement->GetType() != ShaderAst::NodeType::NoOpStatement)
AppendLine();
statement->Visit(*this);
first = false;
}
AppendStatementList(node.statements);
}
void GlslWriter::Visit(ShaderAst::NoOpStatement& /*node*/)
@ -843,6 +846,8 @@ namespace Nz
outputStructVarName = s_outputVarName;
}
AppendLine();
for (const auto& [name, targetName] : m_currentState->outputFields)
{
bool isOutputPosition = (m_currentState->stage == ShaderStageType::Vertex && m_environment.flipYPosition && targetName == "gl_Position");
@ -853,7 +858,7 @@ namespace Nz
if (isOutputPosition)
Append(" * vec4(1.0, ", s_flipYUniformName, ", 1.0, 1.0)");
Append(";");
AppendLine(";");
}
AppendLine();