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Revert "shareable: Implement extending shareable texture again"

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This reverts commit b474946619.

Reason: #567
This commit is contained in:
Hajime Hoshi 2018-03-24 04:23:00 +09:00
parent 2110191794
commit b92bc6f21c
1 changed files with 10 additions and 58 deletions
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68
internal/shareable/shareable.go
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@ -34,43 +34,6 @@ type backend struct {
page *packing.Page
}
func (b *backend) TryAlloc(width, height int) (*packing.Node, bool) {
// If the region is allocated without any extention, it's fine.
if n := b.page.Alloc(width, height); n != nil {
return n, true
}
// Simulate the extending the page and calculate the appropriate page size.
page := b.page.Clone()
nExtended := 0
for {
if !page.Extend() {
// The page can't be extended any more. Return as failure.
return nil, false
}
nExtended++
if n := page.Alloc(width, height); n != nil {
break
}
}
for i := 0; i < nExtended; i++ {
b.page.Extend()
}
s := b.page.Size()
newImg := restorable.NewImage(s, s, false)
w, h := b.restorable.Size()
newImg.DrawImage(b.restorable, 0, 0, w, h, nil, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
b.restorable.Dispose()
b.restorable = newImg
n := b.page.Alloc(width, height)
if n == nil {
panic("not reached")
}
return n, true
}
var (
// backendsM is a mutex for critical sections of the backend and packing.Node objects.
backendsM sync.Mutex
@ -216,10 +179,7 @@ func (s *Image) IsInvalidated() (bool, error) {
}
func NewImage(width, height int) *Image {
const (
initSize = 1024
maxSize = 4096
)
const maxSize = 2048
backendsM.Lock()
defer backendsM.Unlock()
@ -233,34 +193,26 @@ func NewImage(width, height int) *Image {
}
}
for _, b := range theBackends {
if n, ok := b.TryAlloc(width, height); ok {
for _, s := range theBackends {
if n := s.page.Alloc(width, height); n != nil {
return &Image{
backend: b,
backend: s,
node: n,
}
}
}
size := initSize
for width > size || height > size {
if size == maxSize {
panic("not reached")
}
size *= 2
s := &backend{
restorable: restorable.NewImage(maxSize, maxSize, false),
page: packing.NewPage(maxSize, maxSize), // TODO: Utilize 'Extend' page.
}
theBackends = append(theBackends, s)
b := &backend{
restorable: restorable.NewImage(size, size, false),
page: packing.NewPage(size, maxSize),
}
theBackends = append(theBackends, b)
n := b.page.Alloc(width, height)
n := s.page.Alloc(width, height)
if n == nil {
panic("not reached")
}
i := &Image{
backend: b,
backend: s,
node: n,
}
runtime.SetFinalizer(i, (*Image).Dispose)