diff --git a/demo/client/src/index.ts b/demo/client/src/index.ts
index 18931413..0269ec91 100644
--- a/demo/client/src/index.ts
+++ b/demo/client/src/index.ts
@@ -1255,17 +1255,12 @@ class ECAAStrategy implements AntialiasingStrategy {
         this.detectEdges(view);
 
         // Conservatively cover.
-        //if (view.timerQueryPollInterval == null)
-        //    view.timerQueryExt.beginQueryEXT(view.timerQueryExt.TIME_ELAPSED_EXT, view.timerQuery);
         this.cover(view);
 
         // Antialias.
         this.antialiasLines(view);
         this.antialiasCurves(view);
 
-        //if (view.timerQueryPollInterval == null)
-        //    view.timerQueryExt.endQueryEXT(view.timerQueryExt.TIME_ELAPSED_EXT);
-
         // Resolve the antialiasing.
         this.resolveAA(view);
     }
diff --git a/shaders/gles2/ecaa-cover.fs.glsl b/shaders/gles2/ecaa-cover.fs.glsl
index 6bbafe7a..edcbfaef 100644
--- a/shaders/gles2/ecaa-cover.fs.glsl
+++ b/shaders/gles2/ecaa-cover.fs.glsl
@@ -9,5 +9,5 @@ varying vec2 vHorizontalExtents;
 void main() {
     vec2 sides = gl_FragCoord.xx + vec2(-0.5, 0.5);
     vec2 clampedSides = clamp(vHorizontalExtents, sides.x, sides.y);
-    gl_FragColor = vec4(clampedSides.y - clampedSides.x);
+    gl_FragColor = vec4(vec3(clampedSides.y - clampedSides.x), 1.0);
 }
diff --git a/shaders/gles2/ecaa-curve.fs.glsl b/shaders/gles2/ecaa-curve.fs.glsl
index 861c7fc4..98e30144 100644
--- a/shaders/gles2/ecaa-curve.fs.glsl
+++ b/shaders/gles2/ecaa-curve.fs.glsl
@@ -38,8 +38,8 @@ void main() {
     // be less than a pixel, and it saves a lot of time.)
     //
     // FIXME(pcwalton): Factor out shared terms to avoid computing them multiple times.
-    vec2 t = vec2(pixelExtents.x > p0.x ? solveCurveT(p0.x, cp.x, p1.x, pixelExtents.x) : 0.0,
-                  p1.x < pixelExtents.y ? solveCurveT(p0.x, cp.x, p1.x, pixelExtents.y) : 1.0);
+    vec2 t = vec2(p0.x < pixelExtents.x ? solveCurveT(p0.x, cp.x, p1.x, pixelExtents.x) : 0.0,
+                  p1.x > pixelExtents.y ? solveCurveT(p0.x, cp.x, p1.x, pixelExtents.y) : 1.0);
 
     vec2 spanP0 = mix(mix(p0, cp, t.x), mix(cp, p1, t.x), t.x);
     vec2 spanP1 = mix(mix(p0, cp, t.y), mix(cp, p1, t.y), t.y);