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funny blur speedup

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This commit is contained in:
Ryan Oldenburg 2021-02-27 00:01:01 -06:00
parent 6ec7ec0fbb
commit a04388ee43
2 changed files with 8 additions and 8 deletions
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8
src/pixie/images.nim
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@ -347,8 +347,8 @@ proc blur*(image: Image, radius: float32, outOfBounds = ColorRGBX()) =
(values[3] div 1024 div 255).uint8
)
# Blur in the X direction.
let blurX = newImage(image.width, image.height)
# Blur in the X direction. Store with dimensions swapped for reading later.
let blurX = newImage(image.height, image.width)
for y in 0 ..< image.height:
for x in 0 ..< image.width:
var values: array[4, uint32]
@ -361,7 +361,7 @@ proc blur*(image: Image, radius: float32, outOfBounds = ColorRGBX()) =
for xx in max(x - radius, image.width) ..< x + radius:
values += outOfBounds * lookup[xx - x + radius]
blurX.setRgbaUnsafe(x, y, values.rgbx())
blurX.setRgbaUnsafe(y, x, values.rgbx())
# Blur in the Y direction.
for y in 0 ..< image.height:
@ -371,7 +371,7 @@ proc blur*(image: Image, radius: float32, outOfBounds = ColorRGBX()) =
values += outOfBounds * lookup[yy - y + radius]
for yy in max(y - radius, 0) ..< min(y + radius, image.height):
values += blurX.getRgbaUnsafe(x, yy) * lookup[yy - y + radius]
values += blurX.getRgbaUnsafe(yy, x) * lookup[yy - y + radius]
for yy in max(y - radius, image.height) ..< y + radius:
values += outOfBounds * lookup[yy - y + radius]

8
src/pixie/masks.nim
View file

@ -162,8 +162,8 @@ proc blur*(mask: Mask, radius: float32, outOfBounds: uint8 = 0) =
let lookup = gaussianLookup(radius)
# Blur in the X direction.
let blurX = newMask(mask.width, mask.height)
# Blur in the X direction. Store with dimensions swapped for reading later.
let blurX = newMask(mask.height, mask.width)
for y in 0 ..< mask.height:
for x in 0 ..< mask.width:
var value: uint32
@ -176,7 +176,7 @@ proc blur*(mask: Mask, radius: float32, outOfBounds: uint8 = 0) =
for xx in max(x - radius, mask.width) ..< x + radius:
value += outOfBounds * lookup[xx - x + radius]
blurX.setValueUnsafe(x, y, (value div 1024 div 255).uint8)
blurX.setValueUnsafe(y, x, (value div 1024 div 255).uint8)
# Blur in the Y direction and modify image.
for y in 0 ..< mask.height:
@ -186,7 +186,7 @@ proc blur*(mask: Mask, radius: float32, outOfBounds: uint8 = 0) =
value += outOfBounds * lookup[yy - y + radius]
for yy in max(y - radius, 0) ..< min(y + radius, mask.height):
value += blurX.getValueUnsafe(x, yy) * lookup[yy - y + radius]
value += blurX.getValueUnsafe(yy, x) * lookup[yy - y + radius]
for yy in max(y - radius, mask.height) ..< y + radius:
value += outOfBounds * lookup[yy - y + radius]