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shareable: Add 'disposed' state instead of 'allocated' state

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This commit is contained in:
Hajime Hoshi 2018-04-30 03:26:58 +09:00
parent b1c55f395f
commit 9df977dff8
1 changed files with 20 additions and 23 deletions
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43
internal/shareable/shareable.go
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@ -82,9 +82,9 @@ var (
)
type Image struct {
allocated bool
width int
height int
width int
height int
disposed bool
backend *backend
@ -93,7 +93,7 @@ type Image struct {
}
func (i *Image) ensureNotShared() {
if !i.allocated {
if i.backend == nil {
i.allocate(false)
return
}
@ -113,7 +113,7 @@ func (i *Image) ensureNotShared() {
}
func (i *Image) region() (x, y, width, height int) {
if !i.allocated {
if i.backend == nil {
panic("not reached")
}
if i.node == nil {
@ -131,7 +131,7 @@ func (i *Image) DrawImage(img *Image, sx0, sy0, sx1, sy1 int, geom *affine.GeoM,
backendsM.Lock()
defer backendsM.Unlock()
if !img.allocated {
if img.backend == nil {
img.allocate(true)
}
@ -155,7 +155,7 @@ func (i *Image) ReplacePixels(p []byte) {
backendsM.Lock()
defer backendsM.Unlock()
if !i.allocated {
if i.backend == nil {
i.allocate(true)
}
@ -170,7 +170,7 @@ func (i *Image) At(x, y int) (color.Color, error) {
backendsM.Lock()
defer backendsM.Unlock()
if !i.allocated {
if i.backend == nil {
return color.RGBA{}, nil
}
@ -183,10 +183,6 @@ func (i *Image) At(x, y int) (color.Color, error) {
return clr, err
}
func (i *Image) isDisposed() bool {
return i.backend == nil
}
func (i *Image) Dispose() {
backendsM.Lock()
defer backendsM.Unlock()
@ -195,12 +191,18 @@ func (i *Image) Dispose() {
func (i *Image) dispose() {
defer func() {
i.disposed = true
i.backend = nil
i.node = nil
runtime.SetFinalizer(i, nil)
}()
if i.isDisposed() {
if i.disposed {
return
}
if i.backend == nil {
// Not allocated yet.
return
}
@ -247,7 +249,7 @@ func NewImage(width, height int) *Image {
}
func (i *Image) allocate(shareable bool) {
if i.allocated {
if i.backend != nil {
panic("not reached")
}
@ -257,7 +259,6 @@ func (i *Image) allocate(shareable bool) {
)
if !shareable || i.width > maxSize || i.height > maxSize {
i.allocated = true
i.backend = &backend{
restorable: restorable.NewImage(i.width, i.height, false),
}
@ -266,7 +267,6 @@ func (i *Image) allocate(shareable bool) {
for _, b := range theBackends {
if n, ok := b.TryAlloc(i.width, i.height); ok {
i.allocated = true
i.backend = b
i.node = n
return
@ -290,7 +290,6 @@ func (i *Image) allocate(shareable bool) {
if n == nil {
panic("not reached")
}
i.allocated = true
i.backend = b
i.node = n
runtime.SetFinalizer(i, (*Image).Dispose)
@ -303,9 +302,8 @@ func NewVolatileImage(width, height int) *Image {
r := restorable.NewImage(width, height, true)
i := &Image{
allocated: true,
width: width,
height: height,
width: width,
height: height,
backend: &backend{
restorable: r,
},
@ -320,9 +318,8 @@ func NewScreenFramebufferImage(width, height int) *Image {
r := restorable.NewScreenFramebufferImage(width, height)
i := &Image{
allocated: true,
width: width,
height: height,
width: width,
height: height,
backend: &backend{
restorable: r,
},