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This commit is contained in:
Ryan Oldenburg 2021-06-25 17:07:14 -05:00
parent 9e132b6457
commit 205f091012
2 changed files with 22 additions and 26 deletions
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22
src/pixie/images.nim
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@ -517,16 +517,12 @@ proc getRgbaSmooth*(image: Image, x, y: float32, wrapped = false): ColorRGBX =
## Gets a interpolated color with float point coordinates.
## Pixes outside the image are transparent.
let
minX = floor(x)
minY = floor(y)
diffX = x - minX
diffY = y - minY
x = minX.int
y = minY.int
x0 = (x + 0)
y0 = (y + 0)
x1 = (x + 1)
y1 = (y + 1)
x0 = x.int
y0 = y.int
x1 = x0 + 1
y1 = y0 + 1
xFractional = x.fractional
yFractional = y.fractional
var x0y0, x1y0, x0y1, x1y1: ColorRGBX
if wrapped:
@ -541,10 +537,10 @@ proc getRgbaSmooth*(image: Image, x, y: float32, wrapped = false): ColorRGBX =
x1y1 = image[x1, y1]
let
bottomMix = lerp(x0y0, x1y0, diffX)
topMix = lerp(x0y1, x1y1, diffX)
bottomMix = lerp(x0y0, x1y0, xFractional)
topMix = lerp(x0y1, x1y1, xFractional)
lerp(bottomMix, topMix, diffY)
lerp(bottomMix, topMix, yFractional)
proc drawCorrect(
a, b: Image | Mask, mat = mat3(), tiled = false, blendMode = bmNormal

26
src/pixie/masks.nim
View file

@ -159,22 +159,22 @@ proc fill*(mask: Mask, value: uint8) {.inline.} =
proc getValueSmooth*(mask: Mask, x, y: float32): uint8 =
## Gets a interpolated value with float point coordinates.
let
minX = floor(x)
minY = floor(y)
diffX = x - minX
diffY = y - minY
x = minX.int
y = minY.int
x0 = x.int
y0 = y.int
x1 = x0 + 1
y1 = y0 + 1
xFractional = x.fractional
yFractional = y.fractional
x0y0 = mask[x + 0, y + 0]
x1y0 = mask[x + 1, y + 0]
x0y1 = mask[x + 0, y + 1]
x1y1 = mask[x + 1, y + 1]
x0y0 = mask[x0, y0]
x1y0 = mask[x1, y0]
x0y1 = mask[x0, y1]
x1y1 = mask[x1, y1]
bottomMix = lerp(x0y0, x1y0, diffX)
topMix = lerp(x0y1, x1y1, diffX)
bottomMix = lerp(x0y0, x1y0, xFractional)
topMix = lerp(x0y1, x1y1, xFractional)
lerp(bottomMix, topMix, diffY)
lerp(bottomMix, topMix, yFractional)
proc spread*(mask: Mask, spread: float32) =
## Grows the mask by spread.