optimize border shader

Do not calculate gradient for discarded fragments

1 files changed, 4 insertions, 2 deletions

diff --git a/src/render/shaders/Border.hpp b/src/render/shaders/Border.hpp
index aa0329fe..ab3c7d5b 100644
--- a/src/render/shaders/Border.hpp
+++ b/src/render/shaders/Border.hpp
@@ -55,8 +55,7 @@ void main() {
     highp vec2 originalPixCoord = v_texcoord;
     originalPixCoord *= fullSizeUntransformed;
 
-    vec4 pixColor = getColorForCoord(v_texcoord);
-    pixColor[3] *= alpha;
+    vec4 pixColor = vec4(1.0, 1.0, 1.0, 1.0);
 
     bool done = false;
 
@@ -112,6 +111,9 @@ void main() {
     if (pixColor[3] == 0.0)
         discard;
 
+    pixColor = getColorForCoord(v_texcoord) * pixColor[3];
+    pixColor[3] *= alpha;
+
     gl_FragColor = pixColor;
 }
 )#";