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shareable: Refactoring

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This commit is contained in:
Hajime Hoshi 2018-03-16 01:21:33 +09:00
parent 9092ec083d
commit e7925a12bd
1 changed files with 23 additions and 21 deletions
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44
internal/shareable/shareable.go
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@ -29,21 +29,28 @@ import (
type backend struct {
restorable *restorable.Image
page *packing.Page
// If page is nil, the backend is not shared.
page *packing.Page
}
func (b *backend) Extend() bool {
if !b.page.Extend() {
return false
func (b *backend) TryAlloc(width, height int) (*packing.Node, bool) {
for {
if n := b.page.Alloc(width, height); n != nil {
return n, true
}
if !b.page.Extend() {
break
}
s := b.page.Size()
newImg := restorable.NewImage(s, s, false)
newImg.DrawImage(b.restorable, 0, 0, s, s, nil, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
b.restorable.Dispose()
b.restorable = newImg
}
s := b.page.Size()
newImg := restorable.NewImage(s, s, false)
newImg.DrawImage(b.restorable, 0, 0, s, s, nil, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
b.restorable.Dispose()
b.restorable = newImg
return true
return nil, false
}
var (
@ -209,15 +216,10 @@ func NewImage(width, height int) *Image {
}
for _, b := range theBackends {
for {
if n := b.page.Alloc(width, height); n != nil {
return &Image{
backend: b,
node: n,
}
}
if !b.Extend() {
break
if n, ok := b.TryAlloc(width, height); ok {
return &Image{
backend: b,
node: n,
}
}
}