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This commit is contained in:
Ryan Oldenburg 2021-12-03 14:48:33 -06:00
parent f065b18689
commit bffe8a9839
1 changed files with 4 additions and 4 deletions
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8
src/pixie/images.nim
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@ -62,7 +62,7 @@ proc getRgbaUnsafe*(image: Image, x, y: int): ColorRGBX {.inline, raises: [].} =
## Gets a color from (x, y) coordinates.
## * No bounds checking *
## Make sure that x, y are in bounds.
## Failure in the assumptions will case unsafe memory reads.
## Failure in the assumptions will cause unsafe memory reads.
result = image.data[image.width * y + x]
proc `[]`*(image: Image, x, y: int): ColorRGBX {.inline, raises: [].} =
@ -80,7 +80,7 @@ proc setRgbaUnsafe*(
## Sets a color from (x, y) coordinates.
## * No bounds checking *
## Make sure that x, y are in bounds.
## Failure in the assumptions will case unsafe memory writes.
## Failure in the assumptions will cause unsafe memory writes.
image.data[image.dataIndex(x, y)] = color.asRgbx()
proc `[]=`*(image: Image, x, y: int, color: SomeColor) {.inline, raises: [].} =
@ -419,6 +419,7 @@ proc applyOpacity*(target: Image | Mask, opacity: float32) {.raises: [].} =
let
oddMask = mm_set1_epi16(cast[int16](0xff00))
div255 = mm_set1_epi16(cast[int16](0x8081))
zeroVec = mm_setzero_si128()
opacityVec = mm_slli_epi16(mm_set1_epi16(cast[int16](opacity)), 8)
for _ in 0 ..< byteLen div 16:
when type(target) is Image:
@ -428,8 +429,7 @@ proc applyOpacity*(target: Image | Mask, opacity: float32) {.raises: [].} =
let values = mm_loadu_si128(target.data[index].addr)
let eqZero = mm_cmpeq_epi16(values, mm_setzero_si128())
if mm_movemask_epi8(eqZero) != 0xffff:
if mm_movemask_epi8(mm_cmpeq_epi16(values, zeroVec)) != 0xffff:
var
valuesEven = mm_slli_epi16(mm_andnot_si128(oddMask, values), 8)
valuesOdd = mm_and_si128(values, oddMask)