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graphics: Use an even number for screen height offset

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Fixes #622
This commit is contained in:
Hajime Hoshi 2018-08-12 19:26:38 +09:00
parent 610bf6e39f
commit a82201cfe8
1 changed files with 2 additions and 1 deletions
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3
graphicscontext.go
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@ -122,7 +122,8 @@ func (c *graphicsContext) Update(afterFrameUpdate func()) error {
// c.screen is special: its Y axis is down to up,
// and the origin point is lower left.
op.GeoM.Scale(c.screenScale, -c.screenScale)
op.GeoM.Translate(0, float64(dh))
// Make dh an even number to fit the upper side of the screen (#662).
op.GeoM.Translate(0, float64((dh+1)/2*2))
op.GeoM.Translate(c.offsetX, c.offsetY)
op.CompositeMode = CompositeModeCopy