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internal/graphicsdriver/metal: Reuse DepthStencilState objects

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In Metal, *State objects are not 'transient' and are expensive to
create. Reuse them whenever possible.

See also: https://developer.apple.com/library/archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Cmd-Submiss/Cmd-Submiss.html
This commit is contained in:
Hajime Hoshi 2021-07-06 15:05:44 +09:00
parent ab26312108
commit 3670b7dd62
1 changed files with 56 additions and 57 deletions
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113
internal/graphicsdriver/metal/graphics.go
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@ -312,6 +312,7 @@ type Graphics struct {
cq mtl.CommandQueue
cb mtl.CommandBuffer
rce mtl.RenderCommandEncoder
dsss map[stencilMode]mtl.DepthStencilState
screenDrawable ca.MetalDrawable
@ -511,11 +512,21 @@ func (g *Graphics) Reset() error {
g.cq = mtl.CommandQueue{}
}
// Creating *State objects are expensive and reuse them whenever possible.
// See https://developer.apple.com/library/archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Cmd-Submiss/Cmd-Submiss.html
// TODO: Release existing rpss
if g.rpss == nil {
g.rpss = map[rpsKey]mtl.RenderPipelineState{}
}
for _, dss := range g.dsss {
dss.Release()
}
if g.dsss == nil {
g.dsss = map[stencilMode]mtl.DepthStencilState{}
}
if err := g.view.reset(); err != nil {
return err
}
@ -635,6 +646,50 @@ func (g *Graphics) Reset() error {
}
}
// The stencil reference value is always 0 (default).
g.dsss[prepareStencil] = g.view.getMTLDevice().MakeDepthStencilState(mtl.DepthStencilDescriptor{
BackFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationInvert,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
FrontFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationInvert,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
})
g.dsss[drawWithStencil] = g.view.getMTLDevice().MakeDepthStencilState(mtl.DepthStencilDescriptor{
BackFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionNotEqual,
},
FrontFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionNotEqual,
},
})
g.dsss[noStencil] = g.view.getMTLDevice().MakeDepthStencilState(mtl.DepthStencilDescriptor{
BackFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
FrontFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
})
g.cq = g.view.getMTLDevice().MakeCommandQueue()
return nil
}
@ -727,63 +782,7 @@ func (g *Graphics) draw(rps mtl.RenderPipelineState, dst *Image, dstRegion drive
}
}
// The stencil reference value is always 0 (default).
switch stencilMode {
case prepareStencil:
desc := mtl.DepthStencilDescriptor{
BackFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationInvert,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
FrontFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationInvert,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
}
ss := g.view.getMTLDevice().MakeDepthStencilState(desc)
g.rce.SetDepthStencilState(ss)
ss.Release()
case drawWithStencil:
desc := mtl.DepthStencilDescriptor{
BackFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionNotEqual,
},
FrontFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionNotEqual,
},
}
ss := g.view.getMTLDevice().MakeDepthStencilState(desc)
g.rce.SetDepthStencilState(ss)
ss.Release()
case noStencil:
desc := mtl.DepthStencilDescriptor{
BackFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
FrontFaceStencil: mtl.StencilDescriptor{
StencilFailureOperation: mtl.StencilOperationKeep,
DepthFailureOperation: mtl.StencilOperationKeep,
DepthStencilPassOperation: mtl.StencilOperationKeep,
StencilCompareFunction: mtl.CompareFunctionAlways,
},
}
ss := g.view.getMTLDevice().MakeDepthStencilState(desc)
g.rce.SetDepthStencilState(ss)
ss.Release()
}
g.rce.SetDepthStencilState(g.dsss[stencilMode])
g.rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, indexLen, mtl.IndexTypeUInt16, g.ib, indexOffset*2)