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internal/mipmap: refactoring

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This commit is contained in:
Hajime Hoshi 2024-08-11 22:33:21 +09:00
parent e6807794f2
commit 9a751d7c26
1 changed files with 4 additions and 8 deletions
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12
internal/mipmap/mipmap.go
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@ -111,11 +111,10 @@ func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderSrcImageCount]*Mipmap, verti
}
if level != 0 {
if img := src.level(level); img != nil {
const n = graphics.VertexFloatCount
s := float32(pow2(level))
for i := 0; i < len(vertices)/n; i++ {
vertices[i*n+2] /= s
vertices[i*n+3] /= s
for i := 0; i < len(vertices); i += graphics.VertexFloatCount {
vertices[i+2] /= s
vertices[i+3] /= s
}
imgs[i] = img
continue
@ -150,12 +149,10 @@ func (m *Mipmap) level(level int) *buffered.Image {
var src *buffered.Image
vs := make([]float32, 4*graphics.VertexFloatCount)
shader := atlas.NearestFilterShader
switch {
case level == 1:
src = m.orig
graphics.QuadVertices(vs, 0, 0, float32(m.width), float32(m.height), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
shader = atlas.LinearFilterShader
case level > 1:
src = m.level(level - 1)
if src == nil {
@ -165,7 +162,6 @@ func (m *Mipmap) level(level int) *buffered.Image {
w := sizeForLevel(m.width, level-1)
h := sizeForLevel(m.height, level-1)
graphics.QuadVertices(vs, 0, 0, float32(w), float32(h), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
shader = atlas.LinearFilterShader
default:
panic(fmt.Sprintf("mipmap: invalid level: %d", level))
}
@ -188,7 +184,7 @@ func (m *Mipmap) level(level int) *buffered.Image {
s := buffered.NewImage(w2, h2, m.imageType)
dstRegion := image.Rect(0, 0, w2, h2)
s.DrawTriangles([graphics.ShaderSrcImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderSrcImageCount]image.Rectangle{}, shader, nil, graphicsdriver.FillRuleFillAll)
s.DrawTriangles([graphics.ShaderSrcImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderSrcImageCount]image.Rectangle{}, atlas.LinearFilterShader, nil, graphicsdriver.FillRuleFillAll)
m.setImg(level, s)
return m.imgs[level]