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internal/graphicsdriver/directx: reduce memory usages when reading pixels

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Updates #2294
Updates #2582
This commit is contained in:
Hajime Hoshi 2023-02-28 22:52:38 +09:00
parent 707a44e367
commit 264f0bad42
2 changed files with 27 additions and 29 deletions
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5
image_test.go
View File

@ -26,7 +26,6 @@ import (
"runtime"
"testing"
"time"
"unsafe"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
@ -51,10 +50,6 @@ func skipTooSlowTests(t *testing.T) bool {
t.Skip("too slow or fragile on Wasm")
return true
}
if runtime.GOOS == "windows" && unsafe.Sizeof(uintptr(0)) == 4 {
t.Skip("out of memory often happens on 32bit Windows (#2332)")
return true
}
return false
}

51
internal/graphicsdriver/directx/graphics_windows.go
View File

@ -1335,7 +1335,6 @@ type Image struct {
layouts _D3D12_PLACED_SUBRESOURCE_FOOTPRINT
totalBytes uint64
uploadingStagingBuffer *_ID3D12Resource
readingStagingBuffer *_ID3D12Resource
rtvDescriptorHeap *_ID3D12DescriptorHeap
dsvDescriptorHeap *_ID3D12DescriptorHeap
}
@ -1362,10 +1361,6 @@ func (i *Image) disposeImpl() {
i.uploadingStagingBuffer.Release()
i.uploadingStagingBuffer = nil
}
if i.readingStagingBuffer != nil {
i.readingStagingBuffer.Release()
i.readingStagingBuffer = nil
}
if i.stencil != nil {
i.stencil.Release()
i.stencil = nil
@ -1392,18 +1387,6 @@ func (i *Image) ensureUploadingStagingBuffer() error {
return nil
}
func (i *Image) ensureReadingStagingBuffer() error {
if i.readingStagingBuffer != nil {
return nil
}
var err error
i.readingStagingBuffer, err = createBuffer(i.graphics.device, i.totalBytes, _D3D12_HEAP_TYPE_READBACK)
if err != nil {
return err
}
return nil
}
func (i *Image) ReadPixels(buf []byte, x, y, width, height int) error {
if i.screen {
return errors.New("directx: Pixels cannot be called on the screen")
@ -1413,23 +1396,43 @@ func (i *Image) ReadPixels(buf []byte, x, y, width, height int) error {
return err
}
if err := i.ensureReadingStagingBuffer(); err != nil {
desc := _D3D12_RESOURCE_DESC{
Dimension: _D3D12_RESOURCE_DIMENSION_TEXTURE2D,
Alignment: 0,
Width: uint64(width),
Height: uint32(height),
DepthOrArraySize: 1,
MipLevels: 0,
Format: _DXGI_FORMAT_R8G8B8A8_UNORM,
SampleDesc: _DXGI_SAMPLE_DESC{
Count: 1,
Quality: 0,
},
Layout: _D3D12_TEXTURE_LAYOUT_UNKNOWN,
Flags: _D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET,
}
layouts, _, _, totalBytes := i.graphics.device.GetCopyableFootprints(&desc, 0, 1, 0)
readingStagingBuffer, err := createBuffer(i.graphics.device, totalBytes, _D3D12_HEAP_TYPE_READBACK)
if err != nil {
return err
}
defer func() {
readingStagingBuffer.Release()
}()
if rb, ok := i.transiteState(_D3D12_RESOURCE_STATE_COPY_SOURCE); ok {
i.graphics.copyCommandList.ResourceBarrier([]_D3D12_RESOURCE_BARRIER_Transition{rb})
}
m, err := i.readingStagingBuffer.Map(0, &_D3D12_RANGE{0, 0})
m, err := readingStagingBuffer.Map(0, &_D3D12_RANGE{0, 0})
if err != nil {
return err
}
dst := _D3D12_TEXTURE_COPY_LOCATION_PlacedFootPrint{
pResource: i.readingStagingBuffer,
pResource: readingStagingBuffer,
Type: _D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT,
PlacedFootprint: i.layouts,
PlacedFootprint: layouts,
}
src := _D3D12_TEXTURE_COPY_LOCATION_SubresourceIndex{
pResource: i.texture,
@ -1451,12 +1454,12 @@ func (i *Image) ReadPixels(buf []byte, x, y, width, height int) error {
return err
}
dstBytes := unsafe.Slice((*byte)(unsafe.Pointer(m)), i.totalBytes)
dstBytes := unsafe.Slice((*byte)(unsafe.Pointer(m)), totalBytes)
for j := 0; j < height; j++ {
copy(buf[j*width*4:(j+1)*width*4], dstBytes[j*int(i.layouts.Footprint.RowPitch):])
copy(buf[j*width*4:(j+1)*width*4], dstBytes[j*int(layouts.Footprint.RowPitch):])
}
i.readingStagingBuffer.Unmap(0, nil)
readingStagingBuffer.Unmap(0, nil)
return nil
}