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graphics: Add comments

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Hajime Hoshi 2016-02-29 01:55:29 +09:00
parent 321f5e376e
commit 568dbe9603
1 changed files with 2 additions and 2 deletions
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graphics.go
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@ -40,6 +40,6 @@ func glFilter(c *opengl.Context, filter Filter) opengl.Filter {
type CompositionMode int
const (
CompositionModeSourceOver CompositionMode = CompositionMode(opengl.CompositionModeSourceOver)
CompositionModeLighter = CompositionMode(opengl.CompositionModeLighter)
CompositionModeSourceOver CompositionMode = CompositionMode(opengl.CompositionModeSourceOver) // regular alpha blending
CompositionModeLighter = CompositionMode(opengl.CompositionModeLighter) // sum of source and destination (a.k.a. 'plus' or 'additive')
)