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Merge pull request #3520 from ReinUsesLisp/legacy-varyings

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gl_shader_decompiler: Implement legacy varyings
This commit is contained in:
bunnei
2020-03-25 19:27:51 -04:00
committed by GitHub
parent f8382c9d9d f5658a9fda
commit e6aff11057
4 changed files with 119 additions and 47 deletions
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67
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -366,10 +366,19 @@ constexpr bool IsGenericAttribute(Attribute::Index index) {
return index >= Attribute::Index::Attribute_0 && index <= Attribute::Index::Attribute_31;
}
constexpr bool IsLegacyTexCoord(Attribute::Index index) {
return static_cast<int>(index) >= static_cast<int>(Attribute::Index::TexCoord_0) &&
static_cast<int>(index) <= static_cast<int>(Attribute::Index::TexCoord_7);
}
constexpr Attribute::Index ToGenericAttribute(u64 value) {
return static_cast<Attribute::Index>(value + static_cast<u64>(Attribute::Index::Attribute_0));
}
constexpr int GetLegacyTexCoordIndex(Attribute::Index index) {
return static_cast<int>(index) - static_cast<int>(Attribute::Index::TexCoord_0);
}
u32 GetGenericAttributeIndex(Attribute::Index index) {
ASSERT(IsGenericAttribute(index));
return static_cast<u32>(index) - static_cast<u32>(Attribute::Index::Attribute_0);
@ -498,7 +507,7 @@ private:
if (!identifier.empty()) {
code.AddLine("// {}", identifier);
}
code.AddLine("#version 440 core");
code.AddLine("#version 440 {}", ir.UsesLegacyVaryings() ? "compatibility" : "core");
code.AddLine("#extension GL_ARB_separate_shader_objects : enable");
if (device.HasShaderBallot()) {
code.AddLine("#extension GL_ARB_shader_ballot : require");
@ -561,6 +570,16 @@ private:
if (stage != ShaderType::Fragment) {
return;
}
if (ir.UsesLegacyVaryings()) {
code.AddLine("in gl_PerFragment {{");
++code.scope;
code.AddLine("vec4 gl_TexCoord[8];");
code.AddLine("vec4 gl_Color;");
code.AddLine("vec4 gl_SecondaryColor;");
--code.scope;
code.AddLine("}};");
}
for (u32 rt = 0; rt < Maxwell::NumRenderTargets; ++rt) {
code.AddLine("layout (location = {}) out vec4 frag_color{};", rt, rt);
}
@ -617,12 +636,12 @@ private:
code.AddLine("float gl_PointSize;");
}
if (ir.UsesInstanceId()) {
code.AddLine("int gl_InstanceID;");
}
if (ir.UsesVertexId()) {
code.AddLine("int gl_VertexID;");
if (ir.UsesLegacyVaryings()) {
code.AddLine("vec4 gl_TexCoord[8];");
code.AddLine("vec4 gl_FrontColor;");
code.AddLine("vec4 gl_FrontSecondaryColor;");
code.AddLine("vec4 gl_BackColor;");
code.AddLine("vec4 gl_BackSecondaryColor;");
}
--code.scope;
@ -1128,6 +1147,10 @@ private:
default:
UNREACHABLE();
}
case Attribute::Index::FrontColor:
return {"gl_Color"s + GetSwizzle(element), Type::Float};
case Attribute::Index::FrontSecondaryColor:
return {"gl_SecondaryColor"s + GetSwizzle(element), Type::Float};
case Attribute::Index::PointCoord:
switch (element) {
case 0:
@ -1168,6 +1191,12 @@ private:
return {GeometryPass(GetGenericInputAttribute(attribute)) + GetSwizzle(element),
Type::Float};
}
if (IsLegacyTexCoord(attribute)) {
UNIMPLEMENTED_IF(stage == ShaderType::Geometry);
return {fmt::format("gl_TexCoord[{}]{}", GetLegacyTexCoordIndex(attribute),
GetSwizzle(element)),
Type::Float};
}
break;
}
UNIMPLEMENTED_MSG("Unhandled input attribute: {}", static_cast<u32>(attribute));
@ -1206,11 +1235,12 @@ private:
}
std::optional<Expression> GetOutputAttribute(const AbufNode* abuf) {
const u32 element = abuf->GetElement();
switch (const auto attribute = abuf->GetIndex()) {
case Attribute::Index::Position:
return {{"gl_Position"s + GetSwizzle(abuf->GetElement()), Type::Float}};
return {{"gl_Position"s + GetSwizzle(element), Type::Float}};
case Attribute::Index::LayerViewportPointSize:
switch (abuf->GetElement()) {
switch (element) {
case 0:
UNIMPLEMENTED();
return {};
@ -1228,13 +1258,26 @@ private:
return {{"gl_PointSize", Type::Float}};
}
return {};
case Attribute::Index::FrontColor:
return {{"gl_FrontColor"s + GetSwizzle(element), Type::Float}};
case Attribute::Index::FrontSecondaryColor:
return {{"gl_FrontSecondaryColor"s + GetSwizzle(element), Type::Float}};
case Attribute::Index::BackColor:
return {{"gl_BackColor"s + GetSwizzle(element), Type::Float}};
case Attribute::Index::BackSecondaryColor:
return {{"gl_BackSecondaryColor"s + GetSwizzle(element), Type::Float}};
case Attribute::Index::ClipDistances0123:
return {{fmt::format("gl_ClipDistance[{}]", abuf->GetElement()), Type::Float}};
return {{fmt::format("gl_ClipDistance[{}]", element), Type::Float}};
case Attribute::Index::ClipDistances4567:
return {{fmt::format("gl_ClipDistance[{}]", abuf->GetElement() + 4), Type::Float}};
return {{fmt::format("gl_ClipDistance[{}]", element + 4), Type::Float}};
default:
if (IsGenericAttribute(attribute)) {
return {{GetGenericOutputAttribute(attribute, abuf->GetElement()), Type::Float}};
return {{GetGenericOutputAttribute(attribute, element), Type::Float}};
}
if (IsLegacyTexCoord(attribute)) {
return {{fmt::format("gl_TexCoord[{}]{}", GetLegacyTexCoordIndex(attribute),
GetSwizzle(element)),
Type::Float}};
}
UNIMPLEMENTED_MSG("Unhandled output attribute: {}", static_cast<u32>(attribute));
return {};