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internal/atlas: use bit manipulation for function power of 2 -like functions (#2915)

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Closes #2914
This commit is contained in:
Mykhailo Lohachov 2024-02-25 02:06:52 +09:00 committed by GitHub
parent 64cb6cf8a9
commit 012fe52b6f
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GPG Key ID: B5690EEEBB952194
2 changed files with 3 additions and 12 deletions
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7
internal/atlas/image.go
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@ -18,6 +18,7 @@ import (
"fmt" "fmt"
"image" "image"
"math" "math"
"math/bits"
"runtime" "runtime"
"sync" "sync"
@ -885,11 +886,7 @@ func floorPowerOf2(x int) int {
if x <= 0 { if x <= 0 {
return 0 return 0
} }
p2 := 1 return 1 << (bits.Len(uint(x)) - 1)
for p2*2 <= x {
p2 *= 2
}
return p2
} }
func BeginFrame(graphicsDriver graphicsdriver.Graphics) error { func BeginFrame(graphicsDriver graphicsdriver.Graphics) error {

8
internal/packing/packing.go
View File

@ -32,13 +32,7 @@ func isPositivePowerOf2(x int) bool {
if x <= 0 { if x <= 0 {
return false return false
} }
for x > 1 { return x&(x-1) == 0
if x/2*2 != x {
return false
}
x /= 2
}
return true
} }
func NewPage(initWidth, initHeight int, maxSize int) *Page { func NewPage(initWidth, initHeight int, maxSize int) *Page {