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internal/mipmap: reuse internal mipmap images whenever possible

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Closes #3093
This commit is contained in:
Hajime Hoshi 2024-09-12 15:25:43 +09:00
parent 4bccf9d009
commit 6389db14a2
1 changed files with 35 additions and 16 deletions
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51
internal/mipmap/mipmap.go
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@ -41,7 +41,12 @@ type Mipmap struct {
height int
imageType atlas.ImageType
orig *buffered.Image
imgs map[int]*buffered.Image
imgs map[int]imageWithDirtyFlag
}
type imageWithDirtyFlag struct {
img *buffered.Image
dirty bool
}
func New(width, height int, imageType atlas.ImageType) *Mipmap {
@ -59,7 +64,14 @@ func (m *Mipmap) DumpScreenshot(graphicsDriver graphicsdriver.Graphics, name str
func (m *Mipmap) WritePixels(pix []byte, region image.Rectangle) {
m.orig.WritePixels(pix, region)
m.deallocateMipmaps()
m.markDirty()
}
func (m *Mipmap) markDirty() {
for i, img := range m.imgs {
img.dirty = true
m.imgs[i] = img
}
}
func (m *Mipmap) ReadPixels(graphicsDriver graphicsdriver.Graphics, pixels []byte, region image.Rectangle) (ok bool, err error) {
@ -125,14 +137,17 @@ func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderSrcImageCount]*Mipmap, verti
}
m.orig.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule, hint)
m.deallocateMipmaps()
m.markDirty()
}
func (m *Mipmap) setImg(level int, img *buffered.Image) {
if m.imgs == nil {
m.imgs = map[int]*buffered.Image{}
m.imgs = map[int]imageWithDirtyFlag{}
}
m.imgs[level] = imageWithDirtyFlag{
img: img,
dirty: false,
}
m.imgs[level] = img
}
func (m *Mipmap) level(level int) *buffered.Image {
@ -144,8 +159,9 @@ func (m *Mipmap) level(level int) *buffered.Image {
panic("mipmap: mipmap images for a screen image is not implemented yet")
}
if img, ok := m.imgs[level]; ok {
return img
img, ok := m.imgs[level]
if ok && !img.dirty {
return img.img
}
var src *buffered.Image
@ -182,7 +198,13 @@ func (m *Mipmap) level(level int) *buffered.Image {
return nil
}
s := buffered.NewImage(w2, h2, m.imageType)
var s *buffered.Image
if img.img != nil {
// As s is overwritten, this doesn't have to be cleared.
s = img.img
} else {
s = buffered.NewImage(w2, h2, m.imageType)
}
dstRegion := image.Rect(0, 0, w2, h2)
w := sizeForLevel(m.width, level-1)
@ -191,7 +213,7 @@ func (m *Mipmap) level(level int) *buffered.Image {
s.DrawTriangles([graphics.ShaderSrcImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderSrcImageCount]image.Rectangle{srcRegion}, atlas.LinearFilterShader, nil, graphicsdriver.FillRuleFillAll, restorable.HintOverwriteDstRegion)
m.setImg(level, s)
return m.imgs[level]
return m.imgs[level].img
}
func sizeForLevel(x int, level int) int {
@ -205,19 +227,16 @@ func sizeForLevel(x int, level int) int {
}
func (m *Mipmap) Deallocate() {
m.deallocateMipmaps()
m.orig.Deallocate()
}
func (m *Mipmap) deallocateMipmaps() {
for _, img := range m.imgs {
if img != nil {
img.Deallocate()
if img.img == nil {
continue
}
img.img.Deallocate()
}
for k := range m.imgs {
delete(m.imgs, k)
}
m.orig.Deallocate()
}
// mipmapLevel returns an appropriate mipmap level for the given distance.