LibGfx: Add Color::with_opacity(float opacity)

This returns the color with its alpha scaled by the opacity.
Author: https://github.com/MacDue Commit: https://github.com/SerenityOS/serenity/commit/120e5b6b6f Pull-request: https://github.com/SerenityOS/serenity/pull/18927
2023-05-18 19:02:00 +01:00 · 2023-05-18 19:02:00 +01:00 · 120e5b6b6f · 2024-07-17 03:27:40 +09:00
commit 120e5b6b6f
parent f0560fd087
1 changed files with 5 additions and 0 deletions
--- a/Userland/Libraries/LibGfx/Color.h
+++ b/Userland/Libraries/LibGfx/Color.h
@ -331,6 +331,11 @@ public:
            alpha());
    }

+    constexpr Color with_opacity(float opacity) const
+    {
+        return with_alpha(alpha() * opacity);
+    }
+
    constexpr Color darkened(float amount = 0.5f) const
    {
        return Color(red() * amount, green() * amount, blue() * amount, alpha());