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blur performance improved

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This commit is contained in:
Ryan Oldenburg 2021-02-26 18:06:28 -06:00
parent 117cad90b2
commit 39d316d0d7
2 changed files with 54 additions and 27 deletions
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36
src/pixie/images.nim
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@ -354,22 +354,38 @@ proc blur*(image: Image, radius: float32) =
for y in 0 ..< image.height:
for x in 0 ..< image.width:
var values: array[4, uint32]
for xb in -radius .. radius:
let
sample = image[x + xb, y]
a = lookup[xb + radius].uint32
values += sample * a
if image.inside(x - radius, y) and image.inside(x + radius, y):
for step in -radius .. radius:
let
sample = image.getRgbaUnsafe(x + step, y)
a = lookup[step + radius].uint32
values += sample * a
else:
for step in -radius .. radius:
let
sample = image[x + step, y]
a = lookup[step + radius].uint32
values += sample * a
blurX.setRgbaUnsafe(x, y, values.rgba())
# Blur in the Y direction.
for y in 0 ..< image.height:
for x in 0 ..< image.width:
var values: array[4, uint32]
for yb in -radius .. radius:
let
sample = blurX[x, y + yb]
a = lookup[yb + radius].uint32
values += sample * a
if image.inside(x, y - radius) and image.inside(x, y + radius):
for step in -radius .. radius:
let
sample = blurX.getRgbaUnsafe(x, y + step)
a = lookup[step + radius].uint32
values += sample * a
else:
for step in -radius .. radius:
let
sample = blurX[x, y + step]
a = lookup[step + radius].uint32
values += sample * a
image.setRgbaUnsafe(x, y, values.rgba())
proc newMask*(image: Image): Mask =

45
src/pixie/masks.nim
View file

@ -154,7 +154,7 @@ proc ceil*(mask: Mask) =
if mask.data[j] != 0:
mask.data[j] = 255
proc blur*(mask: Mask, radius: float32, offBounds: uint32 = 0) =
proc blur*(mask: Mask, radius: float32, outOfBounds: uint8 = 0) =
## Applies Gaussian blur to the image given a radius.
let radius = round(radius).int
if radius == 0:
@ -167,28 +167,39 @@ proc blur*(mask: Mask, radius: float32, offBounds: uint32 = 0) =
for y in 0 ..< mask.height:
for x in 0 ..< mask.width:
var value: uint32
for xb in -radius .. radius:
var sample: uint32
if mask.inside(x + xb, y):
sample = mask.getValueUnsafe(x + xb, y)
else:
sample = offBounds
let a = lookup[xb + radius].uint32
value += sample * a
if mask.inside(x - radius, y) and mask.inside(x + radius, y):
for step in -radius .. radius:
let sample = mask.getValueUnsafe(x + step, y)
value += sample * lookup[step + radius].uint32
else:
for step in -radius .. radius:
var sample: uint32
if mask.inside(x + step, y):
sample = mask.getValueUnsafe(x + step, y)
else:
sample = outOfBounds
value += sample * lookup[step + radius].uint32
blurX.setValueUnsafe(x, y, (value div 1024 div 255).uint8)
# Blur in the Y direction and modify image.
for y in 0 ..< mask.height:
for x in 0 ..< mask.width:
var value: uint32
for yb in -radius .. radius:
var sample: uint32
if blurX.inside(x, y + yb):
sample = blurX.getValueUnsafe(x, y + yb)
else:
sample = offBounds
let a = lookup[yb + radius].uint32
value += sample * a
if mask.inside(x, y - radius) and mask.inside(x, y + radius):
for step in -radius .. radius:
let sample = blurX.getValueUnsafe(x, y + step)
value += sample * lookup[step + radius].uint32
else:
for step in -radius .. radius:
var sample: uint32
if blurX.inside(x, y + step):
sample = blurX.getValueUnsafe(x, y + step)
else:
sample = outOfBounds
let a = lookup[step + radius].uint32
value += sample * a
mask.setValueUnsafe(x, y, (value div 1024 div 255).uint8)
when defined(release):