diff --git a/src/app.cpp b/src/app.cpp
index a7c0f65..970b877 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -372,9 +372,9 @@ void App::init()
     initLayout();
     title_update();
     
-    GLfloat width_range[2];
-    glGetFloatv(GL_SMOOTH_LINE_WIDTH_RANGE, width_range);
-    LOG("GL line range: %f - %f", width_range[0], width_range[1]);
+    //GLfloat width_range[2];
+    //glGetFloatv(GL_SMOOTH_LINE_WIDTH_RANGE, width_range);
+    //LOG("GL line range: %f - %f", width_range[0], width_range[1]);
     LOG("Screen Size: %f %f", width, height);
     
     GLint fb0;
diff --git a/src/app_shaders.cpp b/src/app_shaders.cpp
index 5dd866b..180db4b 100644
--- a/src/app_shaders.cpp
+++ b/src/app_shaders.cpp
@@ -161,12 +161,15 @@ void App::initShaders()
         "void main() {\n"
         "   mediump float stroke = 1.0 - texture(tex, uv).r;\n"
         "   int zero_count = 0;\n"
-        "   for (int x = -1; x <= 1; x++){\n"
-        "       for (int y = -1; y <= 1; y++){\n"
-        "           if (textureOffset(tex, uv, ivec2(x, y)).r == 1.0) \n"
-        "               zero_count++;\n"
-        "       }\n"
-        "   }\n"
+        "   if (textureOffset(tex, uv, ivec2(-1, -1)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2(-1,  0)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2(-1, +1)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2( 0, -1)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2( 0,  0)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2( 0, +1)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2(+1, -1)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2(+1,  0)).r == 1.0) zero_count++;\n"
+        "   if (textureOffset(tex, uv, ivec2(+1, +1)).r == 1.0) zero_count++;\n"
         "   float edge = (zero_count > 1 && zero_count < 9) ? 0.75 : 0.0;\n"
         "   frag = vec4(col.rgb, edge * (1.0 - zero_count / 9.f));\n"
         "}\n";