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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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14
src/Nazara/Shader/GlslWriter.cpp
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@@ -110,6 +110,7 @@ namespace Nz
std::unordered_map<ShaderAst::BuiltinEntry, Builtin> s_builtinMapping = {
{ ShaderAst::BuiltinEntry::FragCoord, { "gl_FragCoord", ShaderStageType::Fragment } },
{ ShaderAst::BuiltinEntry::FragDepth, { "gl_FragDepth", ShaderStageType::Fragment } },
{ ShaderAst::BuiltinEntry::VertexPosition, { "gl_Position", ShaderStageType::Vertex } }
};
}
@@ -206,6 +207,10 @@ namespace Nz
Append("gl_FragCoord");
break;
case ShaderAst::BuiltinEntry::FragDepth:
Append("gl_FragDepth");
break;
case ShaderAst::BuiltinEntry::VertexPosition:
Append("gl_Position");
break;
@@ -500,6 +505,15 @@ namespace Nz
void GlslWriter::HandleEntryPoint(ShaderAst::DeclareFunctionStatement& node)
{
if (node.entryStage == ShaderStageType::Fragment && node.earlyFragmentTests && *node.earlyFragmentTests)
{
if ((m_environment.glES && m_environment.glMajorVersion >= 3 && m_environment.glMinorVersion >= 1) || (!m_environment.glES && m_environment.glMajorVersion >= 4 && m_environment.glMinorVersion >= 2) || m_environment.extCallback("GL_ARB_shader_image_load_store"))
{
AppendLine("layout(early_fragment_tests) in;");
AppendLine();
}
}
HandleInOut();
AppendLine("void main()");
EnterScope();