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simd draw bugfix

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This commit is contained in:
Ryan Oldenburg 2021-09-08 22:46:49 -05:00
parent 47544f64c4
commit 60bcff9bb2
2 changed files with 24 additions and 13 deletions
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35
src/pixie/images.nim
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@ -757,24 +757,35 @@ proc drawUber(
when type(a) is Image: when type(a) is Image:
if blendMode.hasSimdBlender(): if blendMode.hasSimdBlender():
let blenderSimd = blendMode.blenderSimd() let blenderSimd = blendMode.blenderSimd()
for _ in countup(x, xMax - 4, 4): for _ in countup(x, xMax - 16, 16):
# Always take steps of 16 indices since masks will be reading
# 16 bytes even if we only use 4 from the last read.
let let
srcPos = p + dx * x.float32 + dy * y.float32 srcPos = p + dx * x.float32 + dy * y.float32
sx = srcPos.x.int sx = srcPos.x.int
sy = srcPos.y.int sy = srcPos.y.int
backdrop = mm_loadu_si128(a.data[a.dataIndex(x, y)].addr)
when type(b) is Image: when type(b) is Image:
let source = mm_loadu_si128(b.data[b.dataIndex(sx, sy)].addr) for q in [0, 4, 8, 12]:
let
backdrop = mm_loadu_si128(a.data[a.dataIndex(x + q, y)].addr)
source = mm_loadu_si128(b.data[b.dataIndex(sx + q, sy)].addr)
mm_storeu_si128(
a.data[a.dataIndex(x + q, y)].addr,
blenderSimd(backdrop, source)
)
else: # b is a Mask else: # b is a Mask
# Need to move 4 mask values into the alpha slots var values = mm_loadu_si128(b.data[b.dataIndex(sx, sy)].addr)
var source = mm_loadu_si128(b.data[b.dataIndex(sx, sy)].addr) for q in [0, 4, 8, 12]:
source = unpackAlphaValues(source) let
backdrop = mm_loadu_si128(a.data[a.dataIndex(x + q, y)].addr)
mm_storeu_si128( source = unpackAlphaValues(values)
a.data[a.dataIndex(x, y)].addr, mm_storeu_si128(
blenderSimd(backdrop, source) a.data[a.dataIndex(x + q, y)].addr,
) blenderSimd(backdrop, source)
x += 4 )
# Shuffle 32 bits off for the next iteration
values = mm_srli_si128(values, 4)
x += 16
else: # is a Mask else: # is a Mask
if blendMode.hasSimdMasker(): if blendMode.hasSimdMasker():
let maskerSimd = blendMode.maskerSimd() let maskerSimd = blendMode.maskerSimd()

2
tests/benchmark_images_draw.nim
View file

@ -95,7 +95,7 @@ block:
timeIt "shadow": timeIt "shadow":
b.fill(rgba(0, 0, 0, 255)) b.fill(rgba(0, 0, 0, 255))
a.draw(b, vec2(25, 25)) a.draw(b, translate(vec2(25, 25)))
let shadow = a.shadow( let shadow = a.shadow(
offset = vec2(0, 0), offset = vec2(0, 0),