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internal/graphicscommand: Optimize flush

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This commit is contained in:
Hajime Hoshi 2021-09-23 00:03:41 +09:00
parent 7675e2735b
commit 8063f2050c
1 changed files with 29 additions and 16 deletions
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45
internal/graphicscommand/command.go
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@ -219,26 +219,39 @@ func (q *commandQueue) flush() error {
for i := 0; i < n; i++ {
s := q.srcSizes[i]
idx := i * graphics.VertexFloatNum
// Convert pixels to texels.
vs[i*graphics.VertexFloatNum+2] /= s.width
vs[i*graphics.VertexFloatNum+3] /= s.height
vs[idx+2] /= s.width
vs[idx+3] /= s.height
// Avoid the center of the pixel, which is problematic (#929, #1171).
// Instead, align the vertices with about 1/3 pixels.
for idx := 0; idx < 2; idx++ {
x := vs[i*graphics.VertexFloatNum+idx]
ix := float32(math.Floor(float64(x)))
frac := x - ix
switch {
case frac < 3.0/16.0:
vs[i*graphics.VertexFloatNum+idx] = ix
case frac < 8.0/16.0:
vs[i*graphics.VertexFloatNum+idx] = ix + 5.0/16.0
case frac < 13.0/16.0:
vs[i*graphics.VertexFloatNum+idx] = ix + 11.0/16.0
default:
vs[i*graphics.VertexFloatNum+idx] = ix + 16.0/16.0
}
x := vs[idx]
y := vs[idx+1]
ix := float32(math.Floor(float64(x)))
iy := float32(math.Floor(float64(y)))
fracx := x - ix
fracy := y - iy
switch {
case fracx < 3.0/16.0:
vs[idx] = ix
case fracx < 8.0/16.0:
vs[idx] = ix + 5.0/16.0
case fracx < 13.0/16.0:
vs[idx] = ix + 11.0/16.0
default:
vs[idx] = ix + 16.0/16.0
}
switch {
case fracy < 3.0/16.0:
vs[idx+1] = iy
case fracy < 8.0/16.0:
vs[idx+1] = iy + 5.0/16.0
case fracy < 13.0/16.0:
vs[idx+1] = iy + 11.0/16.0
default:
vs[idx+1] = iy + 16.0/16.0
}
}
} else {