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Do smarter blending of visual bell flash

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Blend highlight color with pegtop's softlight mode over both background
and half as much over foreground. This should help with flash visibility
in light themed and inverted colors contexts.
This commit is contained in:
Andrew Mayorov
2020-08-27 18:21:50 +03:00
parent e608d00bb1
commit 9a269d55c7
1 changed files with 13 additions and 2 deletions
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15
kitty/cell_vertex.glsl
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@@ -134,6 +134,10 @@ float is_cursor(uint xi, uint y) {
float x_equal = step(0.5, x1_equal + x2_equal);
return step(2.0, x_equal + y_equal);
}
vec3 blend_softlight(vec3 base, vec3 blend) {
return (1.0 - 2.0 * blend) * base * base + 2.0 * blend * base;
}
// }}}
@@ -191,6 +195,10 @@ void main() {
// Selection
vec3 selection_color = color_to_vec(highlight_fg);
foreground = choose_color(float(is_selected & ONE), selection_color, foreground);
foreground = choose_color(visual_bell_intensity * 0.5,
blend_softlight(color_to_vec(highlight_bg), foreground),
foreground
);
decoration_fg = choose_color(float(is_selected & ONE), selection_color, decoration_fg);
#endif
// Underline and strike through (rendered via sprites)
@@ -236,9 +244,12 @@ void main() {
#if defined(SPECIAL) || defined(SIMPLE)
// Selection and cursor
bg = max(bg, choose_color(visual_bell_intensity, color_to_vec(highlight_bg), bg));
bg = choose_color(float(is_selected & ONE), color_to_vec(highlight_bg), bg);
background = choose_color(cell_has_block_cursor, color_to_vec(cursor_color), bg);
bg = choose_color(cell_has_block_cursor, color_to_vec(cursor_color), bg);
background = choose_color(visual_bell_intensity,
blend_softlight(color_to_vec(highlight_bg), bg),
bg
);
#if !defined(TRANSPARENT) && defined(SPECIAL)
float is_special_cell = cell_has_block_cursor + float(is_selected & ONE);
bg_alpha = step(0.5, is_special_cell);