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internal/mipmap: reland: do not consider filter to determine mipmap level

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This is a reland of 42833614fb.

Now the filter argument is not used (a4e9a05b14),
the filter value can be the nearest filter even though the shader is
for the linear filter.

As long as `canSkipMipmap` is set correctly, we don't have to consider
the parameter `filter`. We should ignore it.

Updates #2364
This commit is contained in:
Hajime Hoshi 2022-10-02 19:14:23 +09:00
parent 4b087a3af4
commit f293a03ab6
2 changed files with 6 additions and 11 deletions
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5
image.go
View File

@ -245,8 +245,7 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) {
})
}
// TODO: Do not pass the filter value. We are removing this argument (#2369).
i.image.DrawTriangles(srcs, vs, is, affine.ColorMIdentity{}, mode, filter, graphicsdriver.AddressUnsafe, i.adjustedRegion(), graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, shader.shader, uniforms, false, canSkipMipmap(options.GeoM, filter))
i.image.DrawTriangles(srcs, vs, is, affine.ColorMIdentity{}, mode, graphicsdriver.FilterNearest, graphicsdriver.AddressUnsafe, i.adjustedRegion(), graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, shader.shader, uniforms, false, canSkipMipmap(options.GeoM, filter))
}
// Vertex represents a vertex passed to DrawTriangles.
@ -454,7 +453,7 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
})
}
i.image.DrawTriangles(srcs, vs, is, affine.ColorMIdentity{}, mode, graphicsdriver.FilterNearest, graphicsdriver.AddressUnsafe, i.adjustedRegion(), sr, [graphics.ShaderImageCount - 1][2]float32{}, shader.shader, uniforms, options.FillRule == EvenOdd, false)
i.image.DrawTriangles(srcs, vs, is, affine.ColorMIdentity{}, mode, graphicsdriver.FilterNearest, graphicsdriver.AddressUnsafe, i.adjustedRegion(), sr, [graphics.ShaderImageCount - 1][2]float32{}, shader.shader, uniforms, options.FillRule == EvenOdd, filter != graphicsdriver.FilterLinear)
}
// DrawTrianglesShaderOptions represents options for DrawTrianglesShader.

12
internal/mipmap/mipmap.go
View File

@ -89,13 +89,13 @@ func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderImageCount]*Mipmap, vertices
dy2 := vertices[n*indices[3*i+2]+1]
sx2 := vertices[n*indices[3*i+2]+2]
sy2 := vertices[n*indices[3*i+2]+3]
if l := mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, filter); level > l {
if l := mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1); level > l {
level = l
}
if l := mipmapLevelFromDistance(dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, filter); level > l {
if l := mipmapLevelFromDistance(dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2); level > l {
level = l
}
if l := mipmapLevelFromDistance(dx2, dy2, dx0, dy0, sx2, sy2, sx0, sy0, filter); level > l {
if l := mipmapLevelFromDistance(dx2, dy2, dx0, dy0, sx2, sy2, sx0, sy0); level > l {
level = l
}
}
@ -232,7 +232,7 @@ func (m *Mipmap) disposeMipmaps() {
}
// mipmapLevel returns an appropriate mipmap level for the given distance.
func mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1 float32, filter graphicsdriver.Filter) int {
func mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1 float32) int {
const maxLevel = 6
d := (dx1-dx0)*(dx1-dx0) + (dy1-dy0)*(dy1-dy0)
@ -252,10 +252,6 @@ func mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1 float32, fil
return 0
}
if filter != graphicsdriver.FilterLinear {
return 0
}
level := 0
for scale < 0.25 {
level++