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This commit is contained in:
Ryan Oldenburg 2021-12-12 23:01:35 -06:00
parent de13c129e4
commit 64e6db2cef
2 changed files with 65 additions and 24 deletions
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2
src/pixie/blends.nim
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@ -165,7 +165,7 @@ proc SetSat(C: Color, s: float32): Color {.inline.} =
if satC > 0:
result = (C - min([C.r, C.g, C.b])) * s / satC
proc blendNormal(backdrop, source: ColorRGBX): ColorRGBX =
proc blendNormal*(backdrop, source: ColorRGBX): ColorRGBX =
if backdrop.a == 0 or source.a == 255:
return source
if source.a == 0:

87
src/pixie/images.nim
View file

@ -913,29 +913,70 @@ proc drawUber(
clamp(srcPos.y, 0, b.height.float32)
)
for x in x ..< xMax:
let samplePos = ivec2((srcPos.x - h).int32, (srcPos.y - h).int32)
when type(a) is Image:
let backdrop = a.unsafe[x, y]
when type(b) is Image:
let
sample = b.unsafe[samplePos.x, samplePos.y]
blended = blender(backdrop, sample)
else: # b is a Mask
let
sample = b.unsafe[samplePos.x, samplePos.y]
blended = blender(backdrop, rgbx(0, 0, 0, sample))
a.unsafe[x, y] = blended
else: # a is a Mask
let backdrop = a.unsafe[x, y]
when type(b) is Image:
let sample = b.unsafe[samplePos.x, samplePos.y].a
else: # b is a Mask
let sample = b.unsafe[samplePos.x, samplePos.y]
a.unsafe[x, y] = masker(backdrop, sample)
srcPos += dx
if blendMode == bmOverwrite:
for x in x ..< xMax:
let samplePos = ivec2((srcPos.x - h).int32, (srcPos.y - h).int32)
when type(a) is Image:
when type(b) is Image:
let source = b.unsafe[samplePos.x, samplePos.y]
else: # b is a Mask
let source = rgbx(0, 0, 0, b.unsafe[samplePos.x, samplePos.y])
a.unsafe[x, y] = source
else: # a is a Mask
when type(b) is Image:
let source = b.unsafe[samplePos.x, samplePos.y].a
else: # b is a Mask
let source = b.unsafe[samplePos.x, samplePos.y]
a.unsafe[x, y] = source
srcPos += dx
elif blendMode == bmNormal:
for x in x ..< xMax:
let samplePos = ivec2((srcPos.x - h).int32, (srcPos.y - h).int32)
when type(a) is Image:
when type(b) is Image:
let source = b.unsafe[samplePos.x, samplePos.y]
else: # b is a Mask
let source = rgbx(0, 0, 0, b.unsafe[samplePos.x, samplePos.y])
if source.a > 0:
if source.a == 255:
a.unsafe[x, y] = source
else:
let backdrop = a.unsafe[x, y]
a.unsafe[x, y] = blendNormal(backdrop, source)
else: # a is a Mask
when type(b) is Image:
let source = b.unsafe[samplePos.x, samplePos.y].a
else: # b is a Mask
let source = b.unsafe[samplePos.x, samplePos.y]
if source > 0:
if source == 255:
a.unsafe[x, y] = source
else:
let backdrop = a.unsafe[x, y]
a.unsafe[x, y] = blendAlpha(backdrop, source)
srcPos += dx
else:
for x in x ..< xMax:
let samplePos = ivec2((srcPos.x - h).int32, (srcPos.y - h).int32)
when type(a) is Image:
let backdrop = a.unsafe[x, y]
when type(b) is Image:
let
sample = b.unsafe[samplePos.x, samplePos.y]
blended = blender(backdrop, sample)
else: # b is a Mask
let
sample = b.unsafe[samplePos.x, samplePos.y]
blended = blender(backdrop, rgbx(0, 0, 0, sample))
a.unsafe[x, y] = blended
else: # a is a Mask
let backdrop = a.unsafe[x, y]
when type(b) is Image:
let sample = b.unsafe[samplePos.x, samplePos.y].a
else: # b is a Mask
let sample = b.unsafe[samplePos.x, samplePos.y]
a.unsafe[x, y] = masker(backdrop, sample)
srcPos += dx
if blendMode == bmMask:
if a.width - xMax > 0: