diff options
Diffstat (limited to 'src/Geometry.cxx')
| -rw-r--r-- | src/Geometry.cxx | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/Geometry.cxx b/src/Geometry.cxx index afdc5d161..97e99d431 100644 --- a/src/Geometry.cxx +++ b/src/Geometry.cxx @@ -12,6 +12,14 @@ #include "Geometry.h" +namespace { + +constexpr unsigned int Mixed(unsigned char a, unsigned char b, double proportion) noexcept { + return static_cast<unsigned int>(a + proportion * (b - a)); +} + +} + namespace Scintilla::Internal { PRectangle Clamp(PRectangle rc, Edge edge, XYPOSITION position) noexcept { @@ -95,4 +103,20 @@ PRectangle PixelAlignOutside(const PRectangle &rc, int pixelDivisions) noexcept std::floor(rc.bottom * pixelDivisions) / pixelDivisions); } +ColourRGBA ColourRGBA::MixedWith(ColourRGBA other) const noexcept { + const unsigned int red = (GetRed() + other.GetRed()) / 2; + const unsigned int green = (GetGreen() + other.GetGreen()) / 2; + const unsigned int blue = (GetBlue() + other.GetBlue()) / 2; + const unsigned int alpha = (GetAlpha() + other.GetAlpha()) / 2; + return ColourRGBA(red, green, blue, alpha); +} + +ColourRGBA ColourRGBA::MixedWith(ColourRGBA other, double proportion) const noexcept { + return ColourRGBA( + Mixed(GetRed(), other.GetRed(), proportion), + Mixed(GetGreen(), other.GetGreen(), proportion), + Mixed(GetBlue(), other.GetBlue(), proportion), + Mixed(GetAlpha(), other.GetAlpha(), proportion)); +} + } |