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mipmap: Skip mipmap calculation if possible

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If we know we can skip mipmap calculation from GeoM, let's skip it.

Updates #1265
This commit is contained in:
Hajime Hoshi 2020-07-26 12:23:55 +09:00
parent d017a1b95e
commit 637afe6d67
2 changed files with 25 additions and 12 deletions
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33
image.go
View File

@ -93,6 +93,17 @@ func (i *Image) Fill(clr color.Color) error {
return nil
}
func canSkipMipmap(geom GeoM, filter driver.Filter) bool {
det := geom.det2x2()
if filter == driver.FilterNearest && det <= 1.1 {
return true
}
if filter == driver.FilterLinear && det >= 0.9 {
return true
}
return false
}
// DrawImageOptions represents options for DrawImage.
type DrawImageOptions struct {
// GeoM is a geometry matrix to draw.
@ -242,10 +253,12 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) error {
mode := driver.CompositeMode(options.CompositeMode)
filter := driver.FilterNearest
if options.Filter != FilterDefault {
filter = driver.Filter(options.Filter)
} else if img.filter != FilterDefault {
filter = driver.Filter(img.filter)
if options.Shader == nil {
if options.Filter != FilterDefault {
filter = driver.Filter(options.Filter)
} else if img.filter != FilterDefault {
filter = driver.Filter(img.filter)
}
}
a, b, c, d, tx, ty := options.GeoM.elements32()
@ -259,11 +272,11 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) error {
srcs := [graphics.ShaderImageNum]*mipmap.Mipmap{img.mipmap}
if options.Shader == nil {
i.mipmap.DrawTriangles(srcs, vs, is, options.ColorM.impl, mode, filter, driver.AddressUnsafe, driver.Region{}, nil, nil)
i.mipmap.DrawTriangles(srcs, vs, is, options.ColorM.impl, mode, filter, driver.AddressUnsafe, driver.Region{}, nil, nil, canSkipMipmap(options.GeoM, filter))
return nil
}
i.mipmap.DrawTriangles(srcs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, options.Shader.shader, options.Uniforms)
i.mipmap.DrawTriangles(srcs, vs, is, nil, mode, filter, driver.AddressUnsafe, driver.Region{}, options.Shader.shader, options.Uniforms, canSkipMipmap(options.GeoM, filter))
return nil
}
@ -424,10 +437,10 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
}
if options.Shader == nil {
i.mipmap.DrawTriangles(srcs, vs, is, options.ColorM.impl, mode, filter, driver.Address(options.Address), sr, nil, nil)
i.mipmap.DrawTriangles(srcs, vs, is, options.ColorM.impl, mode, filter, driver.Address(options.Address), sr, nil, nil, false)
return
}
i.mipmap.DrawTriangles(srcs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, options.Shader.shader, options.Uniforms)
i.mipmap.DrawTriangles(srcs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, options.Shader.shader, options.Uniforms, false)
}
// DrawRectShaderOptions represents options for DrawRectShader
@ -504,7 +517,7 @@ func (i *Image) DrawRectShader(width, height int, shader *Shader, options *DrawR
vs := graphics.QuadVertices(0, 0, float32(width), float32(height), a, b, c, d, tx, ty, 1, 1, 1, 1, false)
is := graphics.QuadIndices()
i.mipmap.DrawTriangles(imgs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, shader.shader, options.Uniforms)
i.mipmap.DrawTriangles(imgs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, shader.shader, options.Uniforms, canSkipMipmap(options.GeoM, driver.FilterNearest))
}
// DrawTrianglesShaderOptions represents options for DrawTrianglesShader
@ -600,7 +613,7 @@ func (i *Image) DrawTrianglesShader(vertices []Vertex, indices []uint16, shader
is := make([]uint16, len(indices))
copy(is, indices)
i.mipmap.DrawTriangles(imgs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, shader.shader, options.Uniforms)
i.mipmap.DrawTriangles(imgs, vs, is, nil, mode, driver.FilterNearest, driver.AddressUnsafe, driver.Region{}, shader.shader, options.Uniforms, false)
}
// SubImage returns an image representing the portion of the image p visible through r.

4
internal/mipmap/mipmap.go
View File

@ -90,10 +90,10 @@ func (m *Mipmap) Pixels(x, y, width, height int) ([]byte, error) {
return m.orig.Pixels(x, y, width, height)
}
func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderImageNum]*Mipmap, vertices []float32, indices []uint16, colorm *affine.ColorM, mode driver.CompositeMode, filter driver.Filter, address driver.Address, sourceRegion driver.Region, shader *Shader, uniforms []interface{}) {
func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderImageNum]*Mipmap, vertices []float32, indices []uint16, colorm *affine.ColorM, mode driver.CompositeMode, filter driver.Filter, address driver.Address, sourceRegion driver.Region, shader *Shader, uniforms []interface{}, canSkipMipmap bool) {
level := 0
// TODO: Do we need to check all the sources' states of being volatile?
if srcs[0] != nil && !srcs[0].volatile && filter != driver.FilterScreen {
if !canSkipMipmap && srcs[0] != nil && !srcs[0].volatile && filter != driver.FilterScreen {
level = math.MaxInt32
for i := 0; i < len(indices)/3; i++ {
const n = graphics.VertexFloatNum