diff options
| author | Clément Foucault <foucault.clem@gmail.com> | 2020-01-20 21:29:09 +0300 |
|---|---|---|
| committer | Clément Foucault <foucault.clem@gmail.com> | 2020-01-20 21:36:08 +0300 |
| commit | 335930ab4efffdf0da751cbb90598353cebffb3b (patch) | |
| tree | 04e1d440d1c4030a8eee942859fb7944e6adff1d /source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl | |
| parent | 31e2786707049c40b9d8639639fd16a5cc0dce13 (diff) | |
Overlay: Improve Outline diagonal Antialiasing
I doubt we can do much better. Most of the aliasing comes from the edge
detection which does not use a lot of samples. We could use more samples
but then the detection becomes way more complex and expensive.
The second issue comes from the reconstruction (AA pass) that only bleed
adjacent pixels in if their line direction is perpendicular to the offset.
This makes corner gaps on certain diagonals.
Diffstat (limited to 'source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl')
| -rw-r--r-- | source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl b/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl index 4784d420e1d..0d01f67c6ea 100644 --- a/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl +++ b/source/blender/draw/engines/overlay/shaders/antialiasing_frag.glsl @@ -144,6 +144,8 @@ void main() vec4 lines = vec4(neightbor_line0.z, neightbor_line1.z, neightbor_line2.z, neightbor_line3.z); /* Count number of line neighbors. */ float blend = dot(vec4(0.25), step(0.001, lines)); + /* Only do blend if there is more than 2 neighbor. This avoid loosing too much AA. */ + blend = clamp(blend * 2.0 - 1.0, 0.0, 1.0); fragColor = mix(fragColor, fragColor / fragColor.a, blend); } #endif |