aw/go-resize
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Dst pixel coordinate fix

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disintegration 2015-03-19 22:52:55 +03:00
parent 53e9ca890b
commit 0feec06645
1 changed files with 3 additions and 3 deletions
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6
filters.go
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@ -87,7 +87,7 @@ func createWeights8(dy, filterLength int, blur, scale float64, kernel func(float
coeffs := make([]int16, dy*filterLength) coeffs := make([]int16, dy*filterLength)
start := make([]int, dy) start := make([]int, dy)
for y := 0; y < dy; y++ { for y := 0; y < dy; y++ {
interpX := scale * (float64(y) + 0.5) interpX := scale*(float64(y)+0.5) - 0.5
start[y] = int(interpX) - filterLength/2 + 1 start[y] = int(interpX) - filterLength/2 + 1
interpX -= float64(start[y]) interpX -= float64(start[y])
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
@ -107,7 +107,7 @@ func createWeights16(dy, filterLength int, blur, scale float64, kernel func(floa
coeffs := make([]int32, dy*filterLength) coeffs := make([]int32, dy*filterLength)
start := make([]int, dy) start := make([]int, dy)
for y := 0; y < dy; y++ { for y := 0; y < dy; y++ {
interpX := scale * (float64(y) + 0.5) interpX := scale*(float64(y)+0.5) - 0.5
start[y] = int(interpX) - filterLength/2 + 1 start[y] = int(interpX) - filterLength/2 + 1
interpX -= float64(start[y]) interpX -= float64(start[y])
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {
@ -126,7 +126,7 @@ func createWeightsNearest(dy, filterLength int, blur, scale float64) ([]bool, []
coeffs := make([]bool, dy*filterLength) coeffs := make([]bool, dy*filterLength)
start := make([]int, dy) start := make([]int, dy)
for y := 0; y < dy; y++ { for y := 0; y < dy; y++ {
interpX := scale * (float64(y) + 0.5) interpX := scale*(float64(y)+0.5) - 0.5
start[y] = int(interpX) - filterLength/2 + 1 start[y] = int(interpX) - filterLength/2 + 1
interpX -= float64(start[y]) interpX -= float64(start[y])
for i := 0; i < filterLength; i++ { for i := 0; i < filterLength; i++ {