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mipmap: Do not allocate independent mipmaps for each sub-image

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Fixes #1247
This commit is contained in:
Hajime Hoshi 2020-07-15 00:22:25 +09:00
parent 2a9fd5ef13
commit f8956941b7
2 changed files with 51 additions and 48 deletions
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89
internal/mipmap/mipmap.go
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@ -54,28 +54,32 @@ func (g *GeoM) det() float32 {
return g.A*g.D - g.B*g.C return g.A*g.D - g.B*g.C
} }
type levelToImage map[int]*shareable.Image
// Mipmap is a set of shareable.Image sorted by the order of mipmap level. // Mipmap is a set of shareable.Image sorted by the order of mipmap level.
// The level 0 image is a regular image and higher-level images are used for mipmap. // The level 0 image is a regular image and higher-level images are used for mipmap.
type Mipmap struct { type Mipmap struct {
width int
height int
volatile bool volatile bool
orig *shareable.Image orig *shareable.Image
imgs map[image.Rectangle]levelToImage imgs map[int]*shareable.Image
} }
func New(width, height int, volatile bool) *Mipmap { func New(width, height int, volatile bool) *Mipmap {
return &Mipmap{ return &Mipmap{
width: width,
height: height,
volatile: volatile, volatile: volatile,
orig: shareable.NewImage(width, height, volatile), orig: shareable.NewImage(width, height, volatile),
imgs: map[image.Rectangle]levelToImage{}, imgs: map[int]*shareable.Image{},
} }
} }
func NewScreenFramebufferMipmap(width, height int) *Mipmap { func NewScreenFramebufferMipmap(width, height int) *Mipmap {
return &Mipmap{ return &Mipmap{
width: width,
height: height,
orig: shareable.NewScreenFramebufferImage(width, height), orig: shareable.NewScreenFramebufferImage(width, height),
imgs: map[image.Rectangle]levelToImage{}, imgs: map[int]*shareable.Image{},
} }
} }
@ -149,17 +153,24 @@ func (m *Mipmap) DrawImage(src *Mipmap, bounds image.Rectangle, geom GeoM, color
a, b, c, d, tx, ty := geom.A, geom.B, geom.C, geom.D, geom.Tx, geom.Ty a, b, c, d, tx, ty := geom.A, geom.B, geom.C, geom.D, geom.Tx, geom.Ty
if level == 0 { if level == 0 {
vs := quadVertices(bounds.Min.X, bounds.Min.Y, bounds.Max.X, bounds.Max.Y, a, b, c, d, tx, ty, cr, cg, cb, ca, screen) sx0 := float32(bounds.Min.X)
sy0 := float32(bounds.Min.Y)
sx1 := float32(bounds.Max.X)
sy1 := float32(bounds.Max.Y)
vs := quadVertices(sx0, sy0, sx1, sy1, a, b, c, d, tx, ty, cr, cg, cb, ca, screen)
is := graphics.QuadIndices() is := graphics.QuadIndices()
m.orig.DrawTriangles(src.orig, vs, is, colorm, mode, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, nil) m.orig.DrawTriangles(src.orig, vs, is, colorm, mode, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, nil)
} else if buf := src.level(bounds, level); buf != nil { } else if buf := src.level(level); buf != nil {
w, h := sizeForLevel(bounds.Dx(), bounds.Dy(), level)
s := pow2(level) s := pow2(level)
sx0 := float32(sizeForLevel(bounds.Min.X, level))
sy0 := float32(sizeForLevel(bounds.Min.Y, level))
sx1 := float32(sizeForLevel(bounds.Max.X, level))
sy1 := float32(sizeForLevel(bounds.Max.Y, level))
a *= s a *= s
b *= s b *= s
c *= s c *= s
d *= s d *= s
vs := quadVertices(0, 0, w, h, a, b, c, d, tx, ty, cr, cg, cb, ca, false) vs := quadVertices(sx0, sy0, sx1, sy1, a, b, c, d, tx, ty, cr, cg, cb, ca, false)
is := graphics.QuadIndices() is := graphics.QuadIndices()
m.orig.DrawTriangles(buf, vs, is, colorm, mode, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, nil) m.orig.DrawTriangles(buf, vs, is, colorm, mode, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, nil)
} }
@ -204,7 +215,7 @@ func (m *Mipmap) DrawTriangles(src *Mipmap, vertices []float32, indices []uint16
m.disposeMipmaps() m.disposeMipmaps()
} }
func (m *Mipmap) level(r image.Rectangle, level int) *shareable.Image { func (m *Mipmap) level(level int) *shareable.Image {
if level == 0 { if level == 0 {
panic("ebiten: level must be non-zero at level") panic("ebiten: level must be non-zero at level")
} }
@ -213,12 +224,7 @@ func (m *Mipmap) level(r image.Rectangle, level int) *shareable.Image {
panic("ebiten: mipmap images for a volatile image is not implemented yet") panic("ebiten: mipmap images for a volatile image is not implemented yet")
} }
if _, ok := m.imgs[r]; !ok { if img, ok := m.imgs[level]; ok {
m.imgs[r] = levelToImage{}
}
imgs := m.imgs[r]
if img, ok := imgs[level]; ok {
return img return img
} }
@ -228,65 +234,64 @@ func (m *Mipmap) level(r image.Rectangle, level int) *shareable.Image {
switch { switch {
case level == 1: case level == 1:
src = m.orig src = m.orig
vs = quadVertices(r.Min.X, r.Min.Y, r.Max.X, r.Max.Y, 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1, false) vs = quadVertices(0, 0, float32(m.width), float32(m.height), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1, false)
filter = driver.FilterLinear filter = driver.FilterLinear
case level > 1: case level > 1:
src = m.level(r, level-1) src = m.level(level - 1)
if src == nil { if src == nil {
imgs[level] = nil m.imgs[level] = nil
return nil return nil
} }
w, h := sizeForLevel(r.Dx(), r.Dy(), level-1) w := sizeForLevel(m.width, level-1)
vs = quadVertices(0, 0, w, h, 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1, false) h := sizeForLevel(m.height, level-1)
vs = quadVertices(0, 0, float32(w), float32(h), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1, false)
filter = driver.FilterLinear filter = driver.FilterLinear
case level == -1: case level == -1:
src = m.orig src = m.orig
vs = quadVertices(r.Min.X, r.Min.Y, r.Max.X, r.Max.Y, 2, 0, 0, 2, 0, 0, 1, 1, 1, 1, false) vs = quadVertices(0, 0, float32(m.width), float32(m.height), 2, 0, 0, 2, 0, 0, 1, 1, 1, 1, false)
filter = driver.FilterNearest filter = driver.FilterNearest
case level < -1: case level < -1:
src = m.level(r, level+1) src = m.level(level + 1)
if src == nil { if src == nil {
imgs[level] = nil m.imgs[level] = nil
return nil return nil
} }
w, h := sizeForLevel(r.Dx(), r.Dy(), level+1) w := sizeForLevel(m.width, level-1)
vs = quadVertices(0, 0, w, h, 2, 0, 0, 2, 0, 0, 1, 1, 1, 1, false) h := sizeForLevel(m.height, level-1)
vs = quadVertices(0, 0, float32(w), float32(h), 2, 0, 0, 2, 0, 0, 1, 1, 1, 1, false)
filter = driver.FilterNearest filter = driver.FilterNearest
default: default:
panic(fmt.Sprintf("ebiten: invalid level: %d", level)) panic(fmt.Sprintf("ebiten: invalid level: %d", level))
} }
is := graphics.QuadIndices() is := graphics.QuadIndices()
w2, h2 := sizeForLevel(r.Dx(), r.Dy(), level) w2 := sizeForLevel(m.width, level-1)
h2 := sizeForLevel(m.height, level-1)
if w2 == 0 || h2 == 0 { if w2 == 0 || h2 == 0 {
imgs[level] = nil m.imgs[level] = nil
return nil return nil
} }
s := shareable.NewImage(w2, h2, m.volatile) s := shareable.NewImage(w2, h2, m.volatile)
s.DrawTriangles(src, vs, is, nil, driver.CompositeModeCopy, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, nil) s.DrawTriangles(src, vs, is, nil, driver.CompositeModeCopy, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, nil)
imgs[level] = s m.imgs[level] = s
return imgs[level] return m.imgs[level]
} }
func sizeForLevel(origWidth, origHeight int, level int) (width, height int) { func sizeForLevel(x int, level int) int {
width = origWidth
height = origHeight
if level > 0 { if level > 0 {
for i := 0; i < level; i++ { for i := 0; i < level; i++ {
width /= 2 x /= 2
height /= 2 if x == 0 {
if width == 0 || height == 0 { return 0
return 0, 0
} }
} }
} else { } else {
for i := 0; i < -level; i++ { for i := 0; i < -level; i++ {
width *= 2 x *= 2
height *= 2
} }
} }
return return x
} }
func (m *Mipmap) MarkDisposed() { func (m *Mipmap) MarkDisposed() {
@ -296,11 +301,9 @@ func (m *Mipmap) MarkDisposed() {
} }
func (m *Mipmap) disposeMipmaps() { func (m *Mipmap) disposeMipmaps() {
for _, a := range m.imgs { for _, img := range m.imgs {
for _, img := range a {
img.MarkDisposed() img.MarkDisposed()
} }
}
for k := range m.imgs { for k := range m.imgs {
delete(m.imgs, k) delete(m.imgs, k)
} }

6
internal/mipmap/vertex.go
View File

@ -60,9 +60,9 @@ func vertexSlice(n int, last bool) []float32 {
return make([]float32, n*graphics.VertexFloatNum) return make([]float32, n*graphics.VertexFloatNum)
} }
func quadVertices(sx0, sy0, sx1, sy1 int, a, b, c, d, tx, ty float32, cr, cg, cb, ca float32, last bool) []float32 { func quadVertices(sx0, sy0, sx1, sy1 float32, a, b, c, d, tx, ty float32, cr, cg, cb, ca float32, last bool) []float32 {
x := float32(sx1 - sx0) x := sx1 - sx0
y := float32(sy1 - sy0) y := sy1 - sy0
ax, by, cx, dy := a*x, b*y, c*x, d*y ax, by, cx, dy := a*x, b*y, c*x, d*y
u0, v0, u1, v1 := float32(sx0), float32(sy0), float32(sx1), float32(sy1) u0, v0, u1, v1 := float32(sx0), float32(sy0), float32(sx1), float32(sy1)