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affine: Implement ColorM.Add for backward compatibility: Don't use this anyway

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This commit is contained in:
Hajime Hoshi 2018-02-13 03:06:19 +09:00
parent f5a283effd
commit 929dfa1cfb
1 changed files with 22 additions and 1 deletions
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23
internal/affine/colorm.go
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@ -173,7 +173,28 @@ func (c *ColorM) Concat(other *ColorM) {
// Add is deprecated.
func (c *ColorM) Add(other ColorM) {
// Do nothing.
// Implementation is just for backward compatibility.
if c.body == nil {
c.body = colorMIdentityBody
c.translate = colorMIdentityTranslate
}
if other.body == nil {
other.body = colorMIdentityBody
other.translate = colorMIdentityTranslate
}
body := make([]float64, len(c.body))
for i := range c.body {
body[i] = c.body[i] + other.body[i]
}
translate := make([]float64, len(c.translate))
for i := range c.translate {
translate[i] = c.translate[i] + other.translate[i]
}
c.body = body
c.translate = translate
}
// Scale scales the matrix by (r, g, b, a).