Review fixes

1 files changed, 9 insertions, 0 deletions

diff --git a/drape/shaders/traffic_fragment_shader.fsh b/drape/shaders/traffic_fragment_shader.fsh
index e7d10f0e9d..f432f86b62 100644
--- a/drape/shaders/traffic_fragment_shader.fsh
+++ b/drape/shaders/traffic_fragment_shader.fsh
@@ -5,9 +5,13 @@ varying float v_halfLength;
 uniform sampler2D u_colorTex;
 uniform sampler2D u_maskTex;
 uniform float u_opacity;
+uniform float u_outline;
 
 const float kAntialiasingThreshold = 0.92;
 
+const float kOutlineThreshold1 = 0.8;
+const float kOutlineThreshold2 = 0.5;
+
 const vec3 kLightArrow = vec3(1.0, 1.0, 1.0);
 const vec3 kDarkArrow = vec3(107.0 / 255.0, 81.0 / 255.0, 20.0 / 255.0);
 
@@ -20,6 +24,11 @@ void main(void)
     vec4 mask = texture2D(u_maskTex, v_maskTexCoord);
     color.a = u_opacity * (1.0 - smoothstep(kAntialiasingThreshold, 1.0, abs(v_halfLength)));
     color.rgb = mix(color.rgb, mask.rgb * mix(kLightArrow, kDarkArrow, step(alphaCode, 0.6)), mask.a);
+    if (u_outline > 0.0)
+    {
+      color.rgb = mix(color.rgb, vec3(1.0, 1.0, 1.0), step(kOutlineThreshold1, abs(v_halfLength)));
+      color.rgb = mix(color.rgb, vec3(1.0, 1.0, 1.0), smoothstep(kOutlineThreshold2, kOutlineThreshold1, abs(v_halfLength)));
+    }
     gl_FragColor = color;
   }
   else