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paint: fix layer merge opacity

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This commit is contained in:
luboslenco
2026-04-20 16:26:46 +02:00
parent d1c2dce0cc
commit 80c8b42894
1 changed files with 10 additions and 9 deletions
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paint/shaders/layer_merge.kong
+10 -9
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@@ -56,8 +56,9 @@ fun rgb_to_hsv(c: float3): float3 {
fun layer_merge_frag(input: vert_out): float4 {
var col0: float4 = sample_lod(tex0, sampler_linear, input.tex, 0.0);
var cola: float4 = sample_lod(texa, sampler_linear, input.tex, 0.0);
var maskr: float = sample_lod(texmask, sampler_linear, input.tex, 0.0).r;
var str: float = col0.a * constants.opac;
str *= sample_lod(texmask, sampler_linear, input.tex, 0.0).r;
str *= maskr;
if (constants.blending == 101) { // Merging _nor and _pack
var col1: float4 = sample_lod(tex1, sampler_linear, input.tex, 0.0);
@@ -93,15 +94,15 @@ fun layer_merge_frag(input: vert_out): float4 {
}
if (constants.blending == 0) { // Mix
return float4(
lerp3(cola.rgb, col0.rgb, str), max(col0.a, cola.a));
lerp3(cola.rgb, col0.rgb, str), max(col0.a * maskr, cola.a));
}
if (constants.blending == 1) { // Darken
return float4(
lerp3(cola.rgb, min3(cola.rgb, col0.rgb), str), max(col0.a, cola.a));
lerp3(cola.rgb, min3(cola.rgb, col0.rgb), str), max(col0.a * maskr, cola.a));
}
if (constants.blending == 2) { // Multiply
return float4(
lerp3(cola.rgb, cola.rgb * col0.rgb, str), max(col0.a, cola.a));
lerp3(cola.rgb, cola.rgb * col0.rgb, str), max(col0.a * maskr, cola.a));
}
if (constants.blending == 3) { // Burn
return float4(
@@ -109,28 +110,28 @@ fun layer_merge_frag(input: vert_out): float4 {
cola.rgb,
float3(1.0, 1.0, 1.0) - (float3(1.0, 1.0, 1.0) - cola.rgb) / col0.rgb,
str),
max(col0.a, cola.a));
max(col0.a * maskr, cola.a));
}
if (constants.blending == 4) { // Lighten
return float4(
max3(cola.rgb, col0.rgb * str),
max(col0.a, cola.a));
max(col0.a * maskr, cola.a));
}
if (constants.blending == 5) { // Screen
return float4(
(float3(1.0, 1.0, 1.0) - (float3(1.0 - str, 1.0 - str, 1.0 - str) +
str * (float3(1.0, 1.0, 1.0) - col0.rgb)) * (float3(1.0, 1.0, 1.0) - cola.rgb)),
max(col0.a, cola.a));
max(col0.a * maskr, cola.a));
}
if (constants.blending == 6) { // Dodge
return float4(
lerp3(cola.rgb, cola.rgb / (float3(1.0, 1.0, 1.0) - col0.rgb), str),
max(col0.a, cola.a));
max(col0.a * maskr, cola.a));
}
if (constants.blending == 7) { // Add
return float4(
lerp3(cola.rgb, cola.rgb + col0.rgb, str),
max(col0.a, cola.a));
max(col0.a * maskr, cola.a));
}
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