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affine: Improve speed of ScaleOnly

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This commit is contained in:
Hajime Hoshi 2019-01-23 02:09:14 +09:00
parent 2b0dff197e
commit 54019a4735
1 changed files with 35 additions and 7 deletions
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42
internal/affine/colorm.go
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@ -68,13 +68,41 @@ func (c *ColorM) ScaleOnly() bool {
return true return true
} }
if c.body != nil { if c.body != nil {
for i, e := range c.body { if c.body[1] != 0 {
if i == 0 || i == 5 || i == 10 || i == 15 { return false
continue }
} if c.body[2] != 0 {
if e != 0 { return false
return false }
} if c.body[3] != 0 {
return false
}
if c.body[4] != 0 {
return false
}
if c.body[6] != 0 {
return false
}
if c.body[7] != 0 {
return false
}
if c.body[8] != 0 {
return false
}
if c.body[9] != 0 {
return false
}
if c.body[11] != 0 {
return false
}
if c.body[12] != 0 {
return false
}
if c.body[13] != 0 {
return false
}
if c.body[14] != 0 {
return false
} }
} }
if c.translate != nil { if c.translate != nil {