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Shader: Add support for pow intrinsic

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This commit is contained in:
Jérôme Leclercq
2021-06-05 01:29:36 +02:00
parent 2d502775a6
commit 50bf26d92f
5 changed files with 48 additions and 1 deletions
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18
src/Nazara/Shader/Ast/SanitizeVisitor.cpp
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@@ -59,9 +59,10 @@ namespace Nz::ShaderAst
{
RegisterIntrinsic("cross", IntrinsicType::CrossProduct);
RegisterIntrinsic("dot", IntrinsicType::DotProduct);
RegisterIntrinsic("length", IntrinsicType::Length);
RegisterIntrinsic("max", IntrinsicType::Max);
RegisterIntrinsic("min", IntrinsicType::Min);
RegisterIntrinsic("length", IntrinsicType::Length);
RegisterIntrinsic("pow", IntrinsicType::Pow);
// Collect function name and their types
if (nodePtr->GetType() == NodeType::MultiStatement)
@@ -1289,6 +1290,7 @@ namespace Nz::ShaderAst
case IntrinsicType::DotProduct:
case IntrinsicType::Max:
case IntrinsicType::Min:
case IntrinsicType::Pow:
{
if (node.parameters.size() != 2)
throw AstError { "Expected two parameters" };
@@ -1379,6 +1381,20 @@ namespace Nz::ShaderAst
break;
}
case IntrinsicType::Pow:
{
const ExpressionType& type = GetExpressionType(*node.parameters.front());
if (!IsPrimitiveType(type) && !IsVectorType(type))
throw AstError{ "pow only works with primitive and vector types" };
if ((IsPrimitiveType(type) && std::get<PrimitiveType>(type) != PrimitiveType::Float32) ||
(IsVectorType(type) && std::get<VectorType>(type).type != PrimitiveType::Float32))
throw AstError{ "pow only works with floating-point primitive or vectors" };
node.cachedExpressionType = type;
break;
}
case IntrinsicType::SampleTexture:
{
node.cachedExpressionType = VectorType{ 4, std::get<SamplerType>(GetExpressionType(*node.parameters.front())).sampledType };