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Cache SubImage for the empty images

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This commit is contained in:
Hajime Hoshi 2021-01-25 01:31:18 +09:00
parent 2b77b57b75
commit 569964d7e4
3 changed files with 13 additions and 6 deletions
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5
ebitenutil/shapes.go
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@ -24,7 +24,8 @@ import (
)
var (
emptyImage = ebiten.NewImage(3, 3)
emptyImage = ebiten.NewImage(3, 3)
emptySubImage = emptyImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
)
func init() {
@ -46,7 +47,7 @@ func DrawLine(dst *ebiten.Image, x1, y1, x2, y2 float64, clr color.Color) {
op.ColorM = colormcache.ColorToColorM(clr)
// Filter must be 'nearest' filter (default).
// Linear filtering would make edges blurred.
dst.DrawImage(emptyImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image), op)
dst.DrawImage(emptySubImage, op)
}
// DrawRect draws a rectangle on the given destination dst.

7
image.go
View File

@ -69,7 +69,10 @@ func (i *Image) Clear() {
i.Fill(color.Transparent)
}
var emptyImage = NewImage(3, 3)
var (
emptyImage = NewImage(3, 3)
emptySubImage = emptyImage.SubImage(image.Rect(1, 1, 2, 2)).(*Image)
)
func init() {
w, h := emptyImage.Size()
@ -101,7 +104,7 @@ func (i *Image) Fill(clr color.Color) {
op.ColorM.Scale(rf, gf, bf, af)
op.CompositeMode = CompositeModeCopy
i.DrawImage(emptyImage.SubImage(image.Rect(1, 1, 2, 2)).(*Image), op)
i.DrawImage(emptySubImage, op)
}
func canSkipMipmap(geom GeoM, filter driver.Filter) bool {

7
vector/path.go
View File

@ -26,7 +26,10 @@ import (
"github.com/hajimehoshi/ebiten/v2/vector/internal/triangulate"
)
var emptyImage = ebiten.NewImage(3, 3)
var (
emptyImage = ebiten.NewImage(3, 3)
emptySubImage = emptyImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
)
func init() {
emptyImage.Fill(color.White)
@ -139,5 +142,5 @@ func (p *Path) Fill(dst *ebiten.Image, op *FillOptions) {
}
base += uint16(len(seg))
}
dst.DrawTriangles(vertices, indices, emptyImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image), nil)
dst.DrawTriangles(vertices, indices, emptySubImage, nil)
}