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This commit is contained in:
Ryan Oldenburg 2022-06-20 22:28:15 -05:00
parent b302c9b38e
commit 67938a0597
1 changed files with 19 additions and 15 deletions
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34
src/pixie/images.nim
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@ -443,31 +443,35 @@ proc applyOpacity*(target: Image | Mask, opacity: float32) {.raises: [].} =
for j in i ..< target.data.len:
target.data[j] = ((target.data[j] * opacity) div 255).uint8
proc invert*(target: Image) {.raises: [].} =
proc invert*(image: Image) {.raises: [].} =
## Inverts all of the colors and alpha.
var i: int
when defined(amd64) and allowSimd:
let vec255 = mm_set1_epi8(cast[int8](255))
let byteLen = target.data.len * 4
for _ in 0 ..< byteLen div 16:
let index = i div 4
var values = mm_loadu_si128(target.data[index].addr)
values = mm_sub_epi8(vec255, values)
mm_storeu_si128(target.data[index].addr, values)
for _ in 0 ..< image.data.len div 16:
let
a = mm_loadu_si128(image.data[i + 0].addr)
b = mm_loadu_si128(image.data[i + 4].addr)
c = mm_loadu_si128(image.data[i + 8].addr)
d = mm_loadu_si128(image.data[i + 12].addr)
mm_storeu_si128(image.data[i + 0].addr, mm_sub_epi8(vec255, a))
mm_storeu_si128(image.data[i + 4].addr, mm_sub_epi8(vec255, b))
mm_storeu_si128(image.data[i + 8].addr, mm_sub_epi8(vec255, c))
mm_storeu_si128(image.data[i + 12].addr, mm_sub_epi8(vec255, d))
i += 16
for j in i div 4 ..< target.data.len:
var rgba = target.data[j]
rgba.r = 255 - rgba.r
rgba.g = 255 - rgba.g
rgba.b = 255 - rgba.b
rgba.a = 255 - rgba.a
target.data[j] = rgba
for j in i ..< image.data.len:
var rgbx = image.data[j]
rgbx.r = 255 - rgbx.r
rgbx.g = 255 - rgbx.g
rgbx.b = 255 - rgbx.b
rgbx.a = 255 - rgbx.a
image.data[j] = rgbx
# Inverting rgbx(50, 100, 150, 200) becomes rgbx(205, 155, 105, 55). This
# is not a valid premultiplied alpha color.
# We need to convert back to premultiplied alpha after inverting.
target.data.toPremultipliedAlpha()
image.data.toPremultipliedAlpha()
proc blur*(
image: Image, radius: float32, outOfBounds: SomeColor = color(0, 0, 0, 0)