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internal/graphicsdriver/directx: remove tearing

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This is basically a revert of 0035ba0bd1.
I couldn't confirm that allowing tearing improved FPS. Rather, this
has a potential risk to cause an error at Present of the swap chain due
to an inconsistent argument, though I have not confirmed an actual issue.

Now the DirectX 11 driver was introduced, the situation has changed.

Updates #2034
Updates #2188
This commit is contained in:
Hajime Hoshi 2023-04-09 14:45:40 +09:00
parent cc24796270
commit 78d3e4273b
2 changed files with 2 additions and 91 deletions
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69
internal/graphicsdriver/directx/dxgi_windows.go
View File

@ -35,12 +35,6 @@ const (
type _DXGI_COLOR_SPACE_TYPE int32
type _DXGI_FEATURE int32
const (
_DXGI_FEATURE_PRESENT_ALLOW_TEARING _DXGI_FEATURE = 0
)
type _DXGI_FORMAT int32
const (
@ -60,18 +54,11 @@ type _DXGI_MODE_SCALING int32
type _DXGI_PRESENT uint32
const (
_DXGI_PRESENT_TEST _DXGI_PRESENT = 0x00000001
_DXGI_PRESENT_ALLOW_TEARING _DXGI_PRESENT = 0x00000200
_DXGI_PRESENT_TEST _DXGI_PRESENT = 0x00000001
)
type _DXGI_SCALING int32
type _DXGI_SWAP_CHAIN_FLAG int32
const (
_DXGI_SWAP_CHAIN_FLAG_ALLOW_TEARING _DXGI_SWAP_CHAIN_FLAG = 2048
)
type _DXGI_SWAP_EFFECT int32
const (
@ -103,7 +90,6 @@ var (
_IID_IDXGIDevice = windows.GUID{Data1: 0x54ec77fa, Data2: 0x1377, Data3: 0x44e6, Data4: [...]byte{0x8c, 0x32, 0x88, 0xfd, 0x5f, 0x44, 0xc8, 0x4c}}
_IID_IDXGIFactory = windows.GUID{Data1: 0x7b7166ec, Data2: 0x21c7, Data3: 0x44ae, Data4: [...]byte{0xb2, 0x1a, 0xc9, 0xae, 0x32, 0x1a, 0xe3, 0x69}}
_IID_IDXGIFactory4 = windows.GUID{Data1: 0x1bc6ea02, Data2: 0xef36, Data3: 0x464f, Data4: [...]byte{0xbf, 0x0c, 0x21, 0xca, 0x39, 0xe5, 0x16, 0x8a}}
_IID_IDXGIFactory5 = windows.GUID{Data1: 0x7632e1f5, Data2: 0xee65, Data3: 0x4dca, Data4: [...]byte{0x87, 0xfd, 0x84, 0xcd, 0x75, 0xf8, 0x83, 0x8d}}
_IID_IDXGISwapChain4 = windows.GUID{Data1: 0x3d585d5a, Data2: 0xbd4a, Data3: 0x489e, Data4: [...]byte{0xb1, 0xf4, 0x3d, 0xbc, 0xb6, 0x45, 0x2f, 0xfb}}
)
@ -391,59 +377,6 @@ func (i *_IDXGIFactory4) Release() uint32 {
return uint32(r)
}
type _IDXGIFactory5 struct {
vtbl *_IDXGIFactory5_Vtbl
}
type _IDXGIFactory5_Vtbl struct {
QueryInterface uintptr
AddRef uintptr
Release uintptr
SetPrivateData uintptr
SetPrivateDataInterface uintptr
GetPrivateData uintptr
GetParent uintptr
EnumAdapters uintptr
MakeWindowAssociation uintptr
GetWindowAssociation uintptr
CreateSwapChain uintptr
CreateSoftwareAdapter uintptr
EnumAdapters1 uintptr
IsCurrent uintptr
IsWindowedStereoEnabled uintptr
CreateSwapChainForHwnd uintptr
CreateSwapChainForCoreWindow uintptr
GetSharedResourceAdapterLuid uintptr
RegisterStereoStatusWindow uintptr
RegisterStereoStatusEvent uintptr
UnregisterStereoStatus uintptr
RegisterOcclusionStatusWindow uintptr
RegisterOcclusionStatusEvent uintptr
UnregisterOcclusionStatus uintptr
CreateSwapChainForComposition uintptr
GetCreationFlags uintptr
EnumAdapterByLuid uintptr
EnumWarpAdapter uintptr
CheckFeatureSupport uintptr
}
func (i *_IDXGIFactory5) CheckFeatureSupport(feature _DXGI_FEATURE, pFeatureSupportData unsafe.Pointer, featureSupportDataSize uint32) error {
r, _, _ := syscall.Syscall6(i.vtbl.CheckFeatureSupport, 4, uintptr(unsafe.Pointer(i)),
uintptr(feature), uintptr(pFeatureSupportData), uintptr(featureSupportDataSize),
0, 0)
runtime.KeepAlive(pFeatureSupportData)
if uint32(r) != uint32(windows.S_OK) {
return fmt.Errorf("directx: IDXGIFactory5::CheckFeatureSupport failed: %w", handleError(windows.Handle(uint32(r))))
}
return nil
}
func (i *_IDXGIFactory5) Release() uint32 {
r, _, _ := syscall.Syscall(i.vtbl.Release, 1, uintptr(unsafe.Pointer(i)), 0, 0)
return uint32(r)
}
type _IDXGIOutput struct {
vtbl *_IDXGIOutput_Vtbl
}

24
internal/graphicsdriver/directx/graphics_windows.go
View File

@ -150,8 +150,6 @@ type graphicsInfra struct {
swapChain *_IDXGISwapChain
swapChain4 *_IDXGISwapChain4
allowTearing bool
// occluded reports whether the screen is invisible or not.
occluded bool
@ -172,16 +170,6 @@ func newGraphicsInfra() (*graphicsInfra, error) {
}
runtime.SetFinalizer(g, (*graphicsInfra).release)
if f, err := g.factory.QueryInterface(&_IID_IDXGIFactory5); err == nil && f != nil {
factory := (*_IDXGIFactory5)(f)
defer factory.Release()
var allowTearing int32
if err := factory.CheckFeatureSupport(_DXGI_FEATURE_PRESENT_ALLOW_TEARING, unsafe.Pointer(&allowTearing), uint32(unsafe.Sizeof(allowTearing))); err == nil && allowTearing != 0 {
g.allowTearing = true
}
}
return g, nil
}
@ -282,10 +270,6 @@ func (g *graphicsInfra) initSwapChain(width, height int, device unsafe.Pointer,
}
g.bufferCount = int(desc.BufferCount)
if g.allowTearing {
desc.Flags |= uint32(_DXGI_SWAP_CHAIN_FLAG_ALLOW_TEARING)
}
s, err := g.factory.CreateSwapChain(device, desc)
if err != nil {
return err
@ -315,11 +299,7 @@ func (g *graphicsInfra) resizeSwapChain(width, height int) error {
return fmt.Errorf("directx: swap chain must be initialized at resizeSwapChain, but is not")
}
var flag uint32
if g.allowTearing {
flag |= uint32(_DXGI_SWAP_CHAIN_FLAG_ALLOW_TEARING)
}
if err := g.swapChain.ResizeBuffers(uint32(g.bufferCount), uint32(width), uint32(height), _DXGI_FORMAT_B8G8R8A8_UNORM, flag); err != nil {
if err := g.swapChain.ResizeBuffers(uint32(g.bufferCount), uint32(width), uint32(height), _DXGI_FORMAT_B8G8R8A8_UNORM, 0); err != nil {
return err
}
return nil
@ -346,8 +326,6 @@ func (g *graphicsInfra) present(vsyncEnabled bool) error {
// Do actual rendering only when the screen is visible.
if vsyncEnabled {
syncInterval = 1
} else if g.allowTearing {
flags |= _DXGI_PRESENT_ALLOW_TEARING
}
}