MyouProject/pixie
3
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

f

Browse source
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
Show stats Download patch file Download diff file Expand all files Collapse all files

34
src/pixie/images.nim
View file

@ -443,31 +443,35 @@ proc applyOpacity*(target: Image | Mask, opacity: float32) {.raises: [].} =
for j in i ..< target.data.len: for j in i ..< target.data.len:
target.data[j] = ((target.data[j] * opacity) div 255).uint8 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. ## Inverts all of the colors and alpha.
var i: int var i: int
when defined(amd64) and allowSimd: when defined(amd64) and allowSimd:
let vec255 = mm_set1_epi8(cast[int8](255)) let vec255 = mm_set1_epi8(cast[int8](255))
let byteLen = target.data.len * 4 for _ in 0 ..< image.data.len div 16:
for _ in 0 ..< byteLen div 16: let
let index = i div 4 a = mm_loadu_si128(image.data[i + 0].addr)
var values = mm_loadu_si128(target.data[index].addr) b = mm_loadu_si128(image.data[i + 4].addr)
values = mm_sub_epi8(vec255, values) c = mm_loadu_si128(image.data[i + 8].addr)
mm_storeu_si128(target.data[index].addr, values) 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 i += 16
for j in i div 4 ..< target.data.len: for j in i ..< image.data.len:
var rgba = target.data[j] var rgbx = image.data[j]
rgba.r = 255 - rgba.r rgbx.r = 255 - rgbx.r
rgba.g = 255 - rgba.g rgbx.g = 255 - rgbx.g
rgba.b = 255 - rgba.b rgbx.b = 255 - rgbx.b
rgba.a = 255 - rgba.a rgbx.a = 255 - rgbx.a
target.data[j] = rgba image.data[j] = rgbx
# Inverting rgbx(50, 100, 150, 200) becomes rgbx(205, 155, 105, 55). This # Inverting rgbx(50, 100, 150, 200) becomes rgbx(205, 155, 105, 55). This
# is not a valid premultiplied alpha color. # is not a valid premultiplied alpha color.
# We need to convert back to premultiplied alpha after inverting. # We need to convert back to premultiplied alpha after inverting.
target.data.toPremultipliedAlpha() image.data.toPremultipliedAlpha()
proc blur*( proc blur*(
image: Image, radius: float32, outOfBounds: SomeColor = color(0, 0, 0, 0) image: Image, radius: float32, outOfBounds: SomeColor = color(0, 0, 0, 0)