mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 03:08:54 +01:00
graphics: More precise enlarging
Before this change, enlarging a 1px image with x4095 scale was not accurate and edges were missing. This change fixes this issue. Updates #611
This commit is contained in:
parent
ab0a6f4ff7
commit
e434869dd7
@ -961,12 +961,15 @@ loop:
|
||||
src.ReplacePixels(pix)
|
||||
|
||||
_, dh := dst.Size()
|
||||
for i := 32; i < dh; i += 32 {
|
||||
for i := 0; i < dh; {
|
||||
dst.Clear()
|
||||
op := &DrawImageOptions{}
|
||||
op.GeoM.Scale(1, float64(i)/float64(h))
|
||||
dst.DrawImage(src.SubImage(image.Rect(0, 0, w, h)).(*Image), op)
|
||||
for j := -2; j <= 2; j++ {
|
||||
for j := -1; j <= 1; j++ {
|
||||
if i+j < 0 {
|
||||
continue
|
||||
}
|
||||
got := dst.At(0, i+j).(color.RGBA)
|
||||
want := color.RGBA{}
|
||||
if j < 0 {
|
||||
@ -977,6 +980,14 @@ loop:
|
||||
continue loop
|
||||
}
|
||||
}
|
||||
switch i % 32 {
|
||||
case 31, 0:
|
||||
i++
|
||||
case 1:
|
||||
i += 32 - 2
|
||||
default:
|
||||
panic("not reached")
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -161,8 +161,8 @@ func (m *mipmap) mipmapLevel(geom *GeoM, width, height int, filter driver.Filter
|
||||
}
|
||||
|
||||
// Use 'negative' mipmap to render edges correctly (#611, #907).
|
||||
// It looks like 256 is the enlargement factor that causes edge missings to pass the test TestImageStretch.
|
||||
const tooBigScale = 256
|
||||
// It looks like 128 is the enlargement factor that causes edge missings to pass the test TestImageStretch.
|
||||
const tooBigScale = 128
|
||||
if sx, sy := geomScaleSize(geom); sx >= tooBigScale || sy >= tooBigScale {
|
||||
// If the filter is not nearest, the target needs to be rendered with gradiation. Don't use mipmaps.
|
||||
if filter != driver.FilterNearest {
|
||||
|
Loading…
Reference in New Issue
Block a user