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Remove artifact when a border side was not rendered

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This introduces an extra conditional in the shader, there's probably a
way of writing it without ifs but I like how the logic reads with it and
it shouldn't be that big of a deal performance-wise.
This commit is contained in:
Antonio Scandurra 2021-03-23 10:33:31 +01:00
parent 32c070250c
commit 3de0ce6079
1 changed files with 12 additions and 6 deletions
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18
gpui/src/platform/mac/shaders/shaders.metal
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@ -73,12 +73,18 @@ fragment float4 quad_fragment(
border_width = center_to_point.y <= 0.0 ? input.quad.border_top : input.quad.border_bottom;
}
float inset_distance = distance + border_width;
float4 color = mix(
coloru_to_colorf(input.quad.border_color),
coloru_to_colorf(input.quad.background_color),
saturate(0.5 - inset_distance)
);
float4 color;
if (border_width == 0.) {
color = coloru_to_colorf(input.quad.background_color);
} else {
float inset_distance = distance + border_width;
color = mix(
coloru_to_colorf(input.quad.border_color),
coloru_to_colorf(input.quad.background_color),
saturate(0.5 - inset_distance)
);
}
float4 coverage = float4(1.0, 1.0, 1.0, saturate(0.5 - distance));
return coverage * color;
}