diff options
| author | Kirill Chibisov <contact@kchibisov.com> | 2022-02-09 17:41:57 +0300 |
|---|---|---|
| committer | Kirill Chibisov <contact@kchibisov.com> | 2022-02-10 03:17:21 +0300 |
| commit | d43196297da7fa458b94744ed3a18fe63adeec65 (patch) | |
| tree | dd0468b82c22c29b093e4809018f036208cb1fb6 | |
| parent | 5c9fa470732b5742d6c14a89245007b6a8340f57 (diff) | |
| download | alacritty-d43196297da7fa458b94744ed3a18fe63adeec65.tar.gz alacritty-d43196297da7fa458b94744ed3a18fe63adeec65.zip | |
Fix alpha when using `colors.transparent_background_colors`
The alpha is expected to be premultiplied from the text shader, so
we should apply it to the background color.
| -rw-r--r-- | CHANGELOG.md | 1 | ||||
| -rw-r--r-- | alacritty/res/text.f.glsl | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md index de90da0e..3e577a95 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -24,6 +24,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). - `font.glyph_offset` is no longer applied on builtin font - Buili-in font arcs alignment - Repeated permission prompts on M1 macs +- Colors being slightly off when using `colors.transparent_background_colors` ## 0.10.0 diff --git a/alacritty/res/text.f.glsl b/alacritty/res/text.f.glsl index 5b4e3da6..3b8cd67c 100644 --- a/alacritty/res/text.f.glsl +++ b/alacritty/res/text.f.glsl @@ -18,7 +18,9 @@ void main() { } alphaMask = vec4(1.0); - color = vec4(bg.rgb, bg.a); + + // Premultiply background color by alpha. + color = vec4(bg.rgb * bg.a, bg.a); } else if ((int(fg.a) & COLORED) != 0) { // Color glyphs, like emojis. vec4 glyphColor = texture(mask, TexCoords); |