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Shader: Add support for depth_write and early_fragment_tests attributes (+ FragDepth builtin)

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This commit is contained in:
Jérôme Leclercq
2021-06-01 12:32:24 +02:00
parent 465837ff12
commit 16e2f5f819
12 changed files with 456 additions and 136 deletions
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62
src/Nazara/Shader/LangWriter.cpp
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@@ -41,6 +41,20 @@ namespace Nz
inline bool HasValue() const { return builtin.has_value(); }
};
struct LangWriter::DepthWriteAttribute
{
std::optional<ShaderAst::DepthWriteMode> writeMode;
inline bool HasValue() const { return writeMode.has_value(); }
};
struct LangWriter::EarlyFragmentTestsAttribute
{
std::optional<bool> earlyFragmentTests;
inline bool HasValue() const { return earlyFragmentTests.has_value(); }
};
struct LangWriter::EntryAttribute
{
std::optional<ShaderStageType> stageType;
@@ -216,12 +230,12 @@ namespace Nz
Append(" ");
}
void LangWriter::AppendAttribute(BindingAttribute builtin)
void LangWriter::AppendAttribute(BindingAttribute binding)
{
if (!builtin.HasValue())
if (!binding.HasValue())
return;
Append("binding(", *builtin.bindingIndex, ")");
Append("binding(", *binding.bindingIndex, ")");
}
void LangWriter::AppendAttribute(BuiltinAttribute builtin)
@@ -235,11 +249,51 @@ namespace Nz
Append("builtin(fragcoord)");
break;
case ShaderAst::BuiltinEntry::FragDepth:
Append("builtin(fragdepth)");
break;
case ShaderAst::BuiltinEntry::VertexPosition:
Append("builtin(position)");
break;
}
}
void LangWriter::AppendAttribute(DepthWriteAttribute depthWrite)
{
if (!depthWrite.HasValue())
return;
switch (*depthWrite.writeMode)
{
case ShaderAst::DepthWriteMode::Greater:
Append("depth_write(greater)");
break;
case ShaderAst::DepthWriteMode::Less:
Append("depth_write(less)");
break;
case ShaderAst::DepthWriteMode::Replace:
Append("depth_write(replace)");
break;
case ShaderAst::DepthWriteMode::Unchanged:
Append("depth_write(unchanged)");
break;
}
}
void LangWriter::AppendAttribute(EarlyFragmentTestsAttribute earlyFragmentTests)
{
if (!earlyFragmentTests.HasValue())
return;
if (*earlyFragmentTests.earlyFragmentTests)
Append("early_fragment_tests(on)");
else
Append("early_fragment_tests(off)");
}
void LangWriter::AppendAttribute(EntryAttribute entry)
{
@@ -553,7 +607,7 @@ namespace Nz
std::optional<std::size_t> varIndexOpt = node.varIndex;
AppendAttributes(true, EntryAttribute{ node.entryStage });
AppendAttributes(true, EntryAttribute{ node.entryStage }, EarlyFragmentTestsAttribute{ node.earlyFragmentTests }, DepthWriteAttribute{ node.depthWrite });
Append("fn ", node.name, "(");
for (std::size_t i = 0; i < node.parameters.size(); ++i)
{