From 7cf433eb68532d07220ce0c9fc22c5329ad81da7 Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Tue, 8 Mar 2016 09:03:49 -0700
Subject: [PATCH] Remove unused ol.color.blend()

---
 src/ol/color/color.js      | 42 --------------------------------------
 test/spec/ol/color.test.js | 27 ------------------------
 2 files changed, 69 deletions(-)

diff --git a/src/ol/color/color.js b/src/ol/color/color.js
index 183cf2339f..cd64a0cefb 100644
--- a/src/ol/color/color.js
+++ b/src/ol/color/color.js
@@ -54,48 +54,6 @@ ol.color.rgbaColorRe_ =
     /^(?:rgba)?\((0|[1-9]\d{0,2}),\s?(0|[1-9]\d{0,2}),\s?(0|[1-9]\d{0,2}),\s?(0|1|0\.\d{0,10})\)$/i;
 
 
-/**
- * @param {ol.Color} dst Destination.
- * @param {ol.Color} src Source.
- * @param {ol.Color=} opt_color Color.
- * @return {ol.Color} Color.
- */
-ol.color.blend = function(dst, src, opt_color) {
-  // http://en.wikipedia.org/wiki/Alpha_compositing
-  // FIXME do we need to scale by 255?
-  var out = opt_color ? opt_color : [];
-  var dstA = dst[3];
-  var srcA = src[3];
-  if (dstA == 1) {
-    out[0] = (src[0] * srcA + dst[0] * (1 - srcA) + 0.5) | 0;
-    out[1] = (src[1] * srcA + dst[1] * (1 - srcA) + 0.5) | 0;
-    out[2] = (src[2] * srcA + dst[2] * (1 - srcA) + 0.5) | 0;
-    out[3] = 1;
-  } else if (srcA === 0) {
-    out[0] = dst[0];
-    out[1] = dst[1];
-    out[2] = dst[2];
-    out[3] = dstA;
-  } else {
-    var outA = srcA + dstA * (1 - srcA);
-    if (outA === 0) {
-      out[0] = 0;
-      out[1] = 0;
-      out[2] = 0;
-      out[3] = 0;
-    } else {
-      out[0] = ((src[0] * srcA + dst[0] * dstA * (1 - srcA)) / outA + 0.5) | 0;
-      out[1] = ((src[1] * srcA + dst[1] * dstA * (1 - srcA)) / outA + 0.5) | 0;
-      out[2] = ((src[2] * srcA + dst[2] * dstA * (1 - srcA)) / outA + 0.5) | 0;
-      out[3] = outA;
-    }
-  }
-  goog.asserts.assert(ol.color.isValid(out),
-      'Output color of blend should be a valid color');
-  return out;
-};
-
-
 /**
  * Return the color as an array. This function maintains a cache of calculated
  * arrays which means the result should not be modified.
diff --git a/test/spec/ol/color.test.js b/test/spec/ol/color.test.js
index 66c1845f3c..b0403f3fb2 100644
--- a/test/spec/ol/color.test.js
+++ b/test/spec/ol/color.test.js
@@ -3,33 +3,6 @@ goog.provide('ol.test.color');
 
 describe('ol.color', function() {
 
-  describe('ol.color.blend', function() {
-    it('blends red (a=1) and blue (a=1) to blue (a=1)', function() {
-      var red = [255, 0, 0, 1];
-      var blue = [0, 0, 255, 1];
-      var blended = ol.color.blend(red, blue);
-      expect(blended).to.eql([0, 0, 255, 1]);
-    });
-    it('blends red (a=1) and blue (a=0) to red (a=1)', function() {
-      var red = [255, 0, 0, 1];
-      var blue = [0, 0, 255, 0];
-      var blended = ol.color.blend(red, blue);
-      expect(blended).to.eql([255, 0, 0, 1]);
-    });
-    it('blends red (a=0.5) and blue (a=0.5) to purple (a=0.75)', function() {
-      var red = [255, 0, 0, 0.5];
-      var blue = [0, 0, 255, 0.5];
-      var blended = ol.color.blend(red, blue);
-      expect(blended).to.eql([85, 0, 170, 0.75]);
-    });
-    it('blends red (a=0.5) and blue (a=0) to red (a=0.5)', function() {
-      var red = [255, 0, 0, 0.5];
-      var blue = [0, 0, 255, 0];
-      var blended = ol.color.blend(red, blue);
-      expect(blended).to.eql([255, 0, 0, 0.5]);
-    });
-  });
-
   describe('ol.color.fromString', function() {
 
     before(function() {