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-rw-r--r--src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-es2.fp3
-rw-r--r--src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer02-es2.fp3
2 files changed, 6 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-es2.fp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-es2.fp
index 0131f38b0..953349f5a 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-es2.fp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-es2.fp
@@ -2,5 +2,8 @@
#version 100
+// we require dFdx/dFdy
+#extension OES_standard_derivatives : require
+
#include curverenderer01-xxx.fp
diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer02-es2.fp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer02-es2.fp
index 358e68b81..66361389b 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer02-es2.fp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer02-es2.fp
@@ -2,5 +2,8 @@
#version 100
+// we require dFdx/dFdy
+#extension OES_standard_derivatives : require
+
#include curverenderer02-xxx.fp