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graphics: Better texels adjusting for small textures (#317)

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Hajime Hoshi 2017-02-06 10:35:42 +09:00
parent bb993a481b
commit 06394680c1
2 changed files with 4 additions and 4 deletions
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4
vertices_js.go
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@ -57,8 +57,8 @@ func vertices(parts ImageParts, width, height int, geo *affine.GeoM) []float32 {
} }
u0, v0, u1, v1 := float64(sx0)/wf, float64(sy0)/hf, float64(sx1)/wf, float64(sy1)/hf u0, v0, u1, v1 := float64(sx0)/wf, float64(sy0)/hf, float64(sx1)/wf, float64(sy1)/hf
// Adjust texels to fix a problem that outside texels are used (#317). // Adjust texels to fix a problem that outside texels are used (#317).
u1 -= 1.0 / 16384.0 u1 -= 1.0 / wf / 256.0
v1 -= 1.0 / 16384.0 v1 -= 1.0 / hf / 256.0
vs.SetIndex(n, dx0) vs.SetIndex(n, dx0)
vs.SetIndex(n+1, dy0) vs.SetIndex(n+1, dy0)
vs.SetIndex(n+2, u0) vs.SetIndex(n+2, u0)

4
vertices_notjs.go
View File

@ -56,8 +56,8 @@ func vertices(parts ImageParts, width, height int, geo *affine.GeoM) []float32 {
} }
u0, v0, u1, v1 := float32(sx0)/wf, float32(sy0)/hf, float32(sx1)/wf, float32(sy1)/hf u0, v0, u1, v1 := float32(sx0)/wf, float32(sy0)/hf, float32(sx1)/wf, float32(sy1)/hf
// Adjust texels to fix a problem that outside texels are used (#317). // Adjust texels to fix a problem that outside texels are used (#317).
u1 -= 1.0 / 16384.0 u1 -= 1.0 / wf / 256.0
v1 -= 1.0 / 16384.0 v1 -= 1.0 / hf / 256.0
vs[n] = x0 vs[n] = x0
vs[n+1] = y0 vs[n+1] = y0
vs[n+2] = u0 vs[n+2] = u0