mth/ebiten
1
0
Fork 0
mirror of https://github.com/hajimehoshi/ebiten.git synced 2024-12-26 11:48:55 +01:00
Code Issues Packages Projects Releases Wiki Activity

ebitenutil: Bug fix: line should use linear filter

Browse Source
This commit is contained in:
Hajime Hoshi 2017-12-03 23:11:39 +09:00
parent d832f1e3cb
commit 95906e9630
1 changed files with 12 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
ebitenutil/shapes.go
View File

@ -21,11 +21,16 @@ import (
"github.com/hajimehoshi/ebiten" "github.com/hajimehoshi/ebiten"
) )
var emptyImage *ebiten.Image var (
emptyNearestImage *ebiten.Image
emptyLinearImage *ebiten.Image
)
func init() { func init() {
emptyImage, _ = ebiten.NewImage(16, 16, ebiten.FilterNearest) emptyNearestImage, _ = ebiten.NewImage(16, 16, ebiten.FilterNearest)
_ = emptyImage.Fill(color.White) _ = emptyNearestImage.Fill(color.White)
emptyLinearImage, _ = ebiten.NewImage(16, 16, ebiten.FilterLinear)
_ = emptyLinearImage.Fill(color.White)
} }
func colorScale(clr color.Color) (rf, gf, bf, af float64) { func colorScale(clr color.Color) (rf, gf, bf, af float64) {
@ -45,7 +50,7 @@ func colorScale(clr color.Color) (rf, gf, bf, af float64) {
// //
// DrawLine is intended to be used mainly for debugging or prototyping purpose. // DrawLine is intended to be used mainly for debugging or prototyping purpose.
func DrawLine(dst *ebiten.Image, x1, y1, x2, y2 float64, clr color.Color) { func DrawLine(dst *ebiten.Image, x1, y1, x2, y2 float64, clr color.Color) {
ew, eh := emptyImage.Size() ew, eh := emptyLinearImage.Size()
length := math.Hypot(x2-x1, y2-y1) length := math.Hypot(x2-x1, y2-y1)
op := &ebiten.DrawImageOptions{} op := &ebiten.DrawImageOptions{}
@ -53,18 +58,18 @@ func DrawLine(dst *ebiten.Image, x1, y1, x2, y2 float64, clr color.Color) {
op.GeoM.Rotate(math.Atan2(y2-y1, x2-x1)) op.GeoM.Rotate(math.Atan2(y2-y1, x2-x1))
op.GeoM.Translate(x1, y1) op.GeoM.Translate(x1, y1)
op.ColorM.Scale(colorScale(clr)) op.ColorM.Scale(colorScale(clr))
_ = dst.DrawImage(emptyImage, op) _ = dst.DrawImage(emptyLinearImage, op)
} }
// DrawRect draws a rectangle on the given destination dst. // DrawRect draws a rectangle on the given destination dst.
// //
// DrawRect is intended to be used mainly for debugging or prototyping purpose. // DrawRect is intended to be used mainly for debugging or prototyping purpose.
func DrawRect(dst *ebiten.Image, x, y, width, height float64, clr color.Color) { func DrawRect(dst *ebiten.Image, x, y, width, height float64, clr color.Color) {
ew, eh := emptyImage.Size() ew, eh := emptyNearestImage.Size()
op := &ebiten.DrawImageOptions{} op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(width/float64(ew), height/float64(eh)) op.GeoM.Scale(width/float64(ew), height/float64(eh))
op.GeoM.Translate(x, y) op.GeoM.Translate(x, y)
op.ColorM.Scale(colorScale(clr)) op.ColorM.Scale(colorScale(clr))
_ = dst.DrawImage(emptyImage, op) _ = dst.DrawImage(emptyNearestImage, op)
} }