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VideoCommon: Better logic op invert approximation

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This commit is contained in:
TellowKrinkle 2022-07-13 03:56:33 -05:00
commit 600ad5f498
6 changed files with 139 additions and 33 deletions
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83
Source/Core/VideoCommon/RenderState.cpp
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@ -185,6 +185,7 @@ void BlendingState::ApproximateLogicOpWithBlending()
{
struct LogicOpApproximation
{
bool blendEnable;
bool subtract;
SrcBlendFactor srcfactor;
DstBlendFactor dstfactor;
@ -193,31 +194,69 @@ void BlendingState::ApproximateLogicOpWithBlending()
// but INVSRCCLR and INVDSTCLR were also aliased and were mixed.
// Thus, NOR, EQUIV, INVERT, COPY_INVERTED, and OR_INVERTED duplicate(d) other values.
static constexpr std::array<LogicOpApproximation, 16> approximations = {{
{false, SrcBlendFactor::Zero, DstBlendFactor::Zero}, // CLEAR
{false, SrcBlendFactor::DstClr, DstBlendFactor::Zero}, // AND
{true, SrcBlendFactor::One, DstBlendFactor::InvSrcClr}, // AND_REVERSE
{false, SrcBlendFactor::One, DstBlendFactor::Zero}, // COPY
{true, SrcBlendFactor::DstClr, DstBlendFactor::One}, // AND_INVERTED
{false, SrcBlendFactor::Zero, DstBlendFactor::One}, // NOOP
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // XOR
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::One}, // OR
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // NOR
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::Zero}, // EQUIV
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // INVERT
{false, SrcBlendFactor::One, DstBlendFactor::InvDstAlpha}, // OR_REVERSE
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // COPY_INVERTED
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::One}, // OR_INVERTED
{false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // NAND
{false, SrcBlendFactor::One, DstBlendFactor::One}, // SET
// clang-format off
{false, false, SrcBlendFactor::One, DstBlendFactor::Zero}, // CLEAR (Shader outputs 0)
{true, false, SrcBlendFactor::DstClr, DstBlendFactor::Zero}, // AND
{true, true, SrcBlendFactor::One, DstBlendFactor::InvSrcClr}, // AND_REVERSE
{false, false, SrcBlendFactor::One, DstBlendFactor::Zero}, // COPY
{true, true, SrcBlendFactor::DstClr, DstBlendFactor::One}, // AND_INVERTED
{true, false, SrcBlendFactor::Zero, DstBlendFactor::One}, // NOOP
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // XOR
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::One}, // OR
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // NOR
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::Zero}, // EQUIV
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::Zero}, // INVERT (Shader outputs 255)
{true, false, SrcBlendFactor::One, DstBlendFactor::InvDstAlpha}, // OR_REVERSE
{false, false, SrcBlendFactor::One, DstBlendFactor::Zero}, // COPY_INVERTED (Shader inverts)
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::One}, // OR_INVERTED
{true, false, SrcBlendFactor::InvDstClr, DstBlendFactor::InvSrcClr}, // NAND
{false, false, SrcBlendFactor::One, DstBlendFactor::Zero}, // SET (Shader outputs 255)
// clang-format on
}};
logicopenable = false;
blendenable = true;
subtract = approximations[u32(logicmode.Value())].subtract;
srcfactor = approximations[u32(logicmode.Value())].srcfactor;
srcfactoralpha = approximations[u32(logicmode.Value())].srcfactor;
dstfactor = approximations[u32(logicmode.Value())].dstfactor;
dstfactoralpha = approximations[u32(logicmode.Value())].dstfactor;
usedualsrc = false;
const LogicOpApproximation& approximation = approximations[static_cast<u32>(logicmode.Value())];
if (approximation.blendEnable)
{
blendenable = true;
subtract = approximation.subtract;
srcfactor = approximation.srcfactor;
srcfactoralpha = approximation.srcfactor;
dstfactor = approximation.dstfactor;
dstfactoralpha = approximation.dstfactor;
}
}
bool BlendingState::LogicOpApproximationIsExact()
{
switch (logicmode.Value())
{
case LogicOp::Clear:
case LogicOp::Set:
case LogicOp::NoOp:
case LogicOp::Invert:
case LogicOp::CopyInverted:
case LogicOp::Copy:
return true;
default:
return false;
}
}
bool BlendingState::LogicOpApproximationWantsShaderHelp()
{
switch (logicmode.Value())
{
case LogicOp::Clear:
case LogicOp::Set:
case LogicOp::NoOp:
case LogicOp::Invert:
case LogicOp::CopyInverted:
return true;
default:
return false;
}
}
void SamplerState::Generate(const BPMemory& bp, u32 index)