1 files changed, 52 insertions, 0 deletions
diff --git a/vendor/github.com/gdamore/tcell/colorfit.go b/vendor/github.com/gdamore/tcell/colorfit.go
new file mode 100644
index 0000000..b7740b8
--- /dev/null
+++ b/vendor/github.com/gdamore/tcell/colorfit.go
@@ -0,0 +1,52 @@
+// Copyright 2016 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"github.com/lucasb-eyer/go-colorful"
+	"math"
+)
+
+// FindColor attempts to find a given color, or the best match possible for it,
+// from the palette given.  This is an expensive operation, so results should
+// be cached by the caller.
+func FindColor(c Color, palette []Color) Color {
+	match := ColorDefault
+	dist := float64(0)
+	r, g, b := c.RGB()
+	c1 := colorful.Color{
+		R: float64(r) / 255.0,
+		G: float64(g) / 255.0,
+		B: float64(b) / 255.0,
+	}
+	for _, d := range palette {
+		r, g, b = d.RGB()
+		c2 := colorful.Color{
+			R: float64(r) / 255.0,
+			G: float64(g) / 255.0,
+			B: float64(b) / 255.0,
+		}
+		// CIE94 is more accurate, but really really expensive.
+		nd := c1.DistanceCIE76(c2)
+		if math.IsNaN(nd) {
+			nd = math.Inf(1)
+		}
+		if match == ColorDefault || nd < dist {
+			match = d
+			dist = nd
+		}
+	}
+	return match
+}