DPF

commit 6d57f75c6a5cc01bf34ba9e72346320395e6b7ee
parent 63b104153575b0eeb62e5e7d1eb942c11cc93821
Author: falkTX <falktx@falktx.com>
Date:   Sat, 19 Jun 2021 19:26:00 +0100

Add convenience Color::withAlpha method

Signed-off-by: falkTX <falktx@falktx.com>

Diffstat:
M
dgl/Color.hpp
 | 
5
+++++
M
dgl/src/Color.cpp
 | 
7
+++++++

2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/dgl/Color.hpp b/dgl/Color.hpp
@@ -66,6 +66,11 @@ struct Color {
     Color(const Color& color1, const Color& color2, float u) noexcept;
 
    /**
+      Create a new color based on this one but with a different alpha value.
+    */
+    Color withAlpha(float alpha) noexcept;
+
+   /**
       Create a color specified by hue, saturation and lightness.
       Values must in [0..1] range.
     */
diff --git a/dgl/src/Color.cpp b/dgl/src/Color.cpp
@@ -114,6 +114,13 @@ Color::Color(const Color& color1, const Color& color2, const float u) noexcept
     interpolate(color2, u);
 }
 
+Color Color::withAlpha(const float alpha) noexcept
+{
+    Color color(*this);
+    color.alpha = alpha;
+    return color;
+}
+
 Color Color::fromHSL(float hue, float saturation, float lightness, float alpha)
 {
     float m1, m2;