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Ryan Oldenburg 2021-11-18 19:02:40 -06:00
parent 8813d61dec
commit 6b78fca0dd
1 changed files with 6 additions and 6 deletions
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12
src/pixie/internal.nim
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@ -56,13 +56,11 @@ proc toPremultipliedAlpha*(data: var seq[ColorRGBA | ColorRGBX]) {.raises: [].}
oddMask = mm_set1_epi16(cast[int16](0xff00))
div255 = mm_set1_epi16(cast[int16](0x8081))
for j in countup(i, data.len - 4, 4):
for _ in countup(i, data.len - 4, 4):
var
color = mm_loadu_si128(data[j].addr)
color = mm_loadu_si128(data[i].addr)
alpha = mm_and_si128(color, alphaMask)
let eqOpaque = mm_cmpeq_epi16(alpha, alphaMask)
if mm_movemask_epi8(eqOpaque) != 0xffff:
if mm_movemask_epi8(mm_cmpeq_epi16(alpha, alphaMask)) != 0xffff:
# If not all of the alpha values are 255, premultiply
var
colorEven = mm_slli_epi16(color, 8)
@ -81,8 +79,10 @@ proc toPremultipliedAlpha*(data: var seq[ColorRGBA | ColorRGBX]) {.raises: [].}
mm_and_si128(alpha, alphaMask), mm_and_si128(color, notAlphaMask)
)
mm_storeu_si128(data[j].addr, color)
mm_storeu_si128(data[i].addr, color)
i += 4
# Convert whatever is left
for j in i ..< data.len:
var c = data[j]