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fix: align blend mode boundary behavior with the editor shader

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Terry Jia
2026-08-06 17:45:59 -04:00
parent b6b2572cd9
commit 9e5cb77906
1 changed files with 28 additions and 4 deletions
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32
comfy_extras/compositor_blend.py
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@@ -44,8 +44,16 @@ CHANNEL_BLEND = {
"overlay": lambda i, l: np.where(i < 0.5, 2 * i * l, 1 - 2 * (1 - l) * (1 - i)),
"darken": lambda i, l: np.minimum(i, l),
"lighten": lambda i, l: np.maximum(i, l),
"color-dodge": lambda i, l: safe_div(i, 1 - l),
"color-burn": lambda i, l: 1 - safe_div(1 - i, l),
"color-dodge": lambda i, l: np.where(
i <= 0,
0.0,
np.where(1 - l <= EPSILON, 1.0, np.minimum(safe_div(i, 1 - l), 1.0)),
),
"color-burn": lambda i, l: np.where(
i >= 1,
1.0,
np.where(l <= EPSILON, 0.0, 1 - np.minimum(safe_div(1 - i, l), 1.0)),
),
"hard-light": lambda i, l: np.where(
l > 0.5,
np.minimum(1 - (1 - i) * (1 - (l - 0.5) * 2), 1),
@@ -58,8 +66,24 @@ CHANNEL_BLEND = {
"linear-burn": lambda i, l: i + l - 1,
"vivid-light": lambda i, l: np.where(
l <= 0.5,
np.maximum(1 - safe_div(1 - i, 2 * l), 0),
np.minimum(safe_div(i, 2 * (1 - l)), 1),
np.where(
i >= 1,
1.0,
np.where(
2 * l <= EPSILON,
0.0,
np.maximum(1 - safe_div(1 - i, 2 * l), 0.0),
),
),
np.where(
i <= 0,
0.0,
np.where(
2 * (1 - l) <= EPSILON,
1.0,
np.minimum(safe_div(i, 2 * (1 - l)), 1.0),
),
),
),
"pin-light": lambda i, l: np.where(
l > 0.5, np.maximum(i, 2 * (l - 0.5)), np.minimum(i, 2 * l)