diff --git a/src/lib/graphics/TwkGLF/glsl/CloneFrag.glsl b/src/lib/graphics/TwkGLF/glsl/CloneFrag.glsl
index 866944875..ce9ded82d 100644
--- a/src/lib/graphics/TwkGLF/glsl/CloneFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/CloneFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform sampler2DRect texture0; /*texture*/
 uniform vec2 cloneOffset;
 in vec2 TexCoord0; // paint stroke texcoord [-1, 1]
diff --git a/src/lib/graphics/TwkGLF/glsl/EraseFrag.glsl b/src/lib/graphics/TwkGLF/glsl/EraseFrag.glsl
index 9808973b0..5fd76af4c 100644
--- a/src/lib/graphics/TwkGLF/glsl/EraseFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/EraseFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform vec4 uniformColor;
 uniform sampler2DRect texture0; /*original*/
 in vec2 TexCoord0; // paint stroke texcoord [-1, 1]
diff --git a/src/lib/graphics/TwkGLF/glsl/PaintColoredFrag.glsl b/src/lib/graphics/TwkGLF/glsl/PaintColoredFrag.glsl
index 2c395a101..6ab4c5b25 100644
--- a/src/lib/graphics/TwkGLF/glsl/PaintColoredFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/PaintColoredFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor;
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 in vec4 UniformColor;
 in vec2 TexCoord0;
 
diff --git a/src/lib/graphics/TwkGLF/glsl/ReplaceFrag.glsl b/src/lib/graphics/TwkGLF/glsl/ReplaceFrag.glsl
index 5f8b9fbc0..6b7df5ca0 100644
--- a/src/lib/graphics/TwkGLF/glsl/ReplaceFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/ReplaceFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform vec4 uniformColor;
 in vec2 TexCoord0;
 
diff --git a/src/lib/graphics/TwkGLF/glsl/ScaleFrag.glsl b/src/lib/graphics/TwkGLF/glsl/ScaleFrag.glsl
index 872769732..251616ebd 100644
--- a/src/lib/graphics/TwkGLF/glsl/ScaleFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/ScaleFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform vec4 uniformColor;
 uniform sampler2DRect texture0; 
 in vec2 TexCoord0; // paint stroke texcoord [-1, 1]
diff --git a/src/lib/graphics/TwkGLF/glsl/SoftCloneFrag.glsl b/src/lib/graphics/TwkGLF/glsl/SoftCloneFrag.glsl
index 6656f2b75..3edf08f17 100644
--- a/src/lib/graphics/TwkGLF/glsl/SoftCloneFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/SoftCloneFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform sampler2DRect texture0; /*texture*/
 uniform vec2 cloneOffset;
 in vec2 TexCoord0; // paint stroke texcoord [-1, 1]
diff --git a/src/lib/graphics/TwkGLF/glsl/SoftEraseFrag.glsl b/src/lib/graphics/TwkGLF/glsl/SoftEraseFrag.glsl
index 5b3af1877..e7a01b006 100644
--- a/src/lib/graphics/TwkGLF/glsl/SoftEraseFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/SoftEraseFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform vec4 uniformColor;
 uniform sampler2DRect texture0; /*original*/
 in vec2 TexCoord0; // paint stroke texcoord [-1, 1]
diff --git a/src/lib/graphics/TwkGLF/glsl/SoftReplaceFrag.glsl b/src/lib/graphics/TwkGLF/glsl/SoftReplaceFrag.glsl
index d42b7f3fb..7410a136c 100755
--- a/src/lib/graphics/TwkGLF/glsl/SoftReplaceFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/SoftReplaceFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform vec4 uniformColor;
 in vec2 TexCoord0; 
 
diff --git a/src/lib/graphics/TwkGLF/glsl/SoftScaleFrag.glsl b/src/lib/graphics/TwkGLF/glsl/SoftScaleFrag.glsl
index 6b3973659..404480bbe 100644
--- a/src/lib/graphics/TwkGLF/glsl/SoftScaleFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/SoftScaleFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform vec4 uniformColor;
 uniform sampler2DRect texture0;
 in vec2 TexCoord0; // paint stroke texcoord [-1, 1]
diff --git a/src/lib/graphics/TwkGLF/glsl/StereoCheckerFrag.glsl b/src/lib/graphics/TwkGLF/glsl/StereoCheckerFrag.glsl
index a0b29d6c5..4f9a0d06c 100755
--- a/src/lib/graphics/TwkGLF/glsl/StereoCheckerFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/StereoCheckerFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform sampler2DRect texture0;
 uniform sampler2DRect texture1;
 in vec2 TexCoord0;
diff --git a/src/lib/graphics/TwkGLF/glsl/StereoScanlineFrag.glsl b/src/lib/graphics/TwkGLF/glsl/StereoScanlineFrag.glsl
index b2a31a9f9..83cc279bc 100755
--- a/src/lib/graphics/TwkGLF/glsl/StereoScanlineFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/StereoScanlineFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform sampler2DRect texture0;
 uniform sampler2DRect texture1;
 in vec2 TexCoord0;
diff --git a/src/lib/graphics/TwkGLF/glsl/TexRectFrag.glsl b/src/lib/graphics/TwkGLF/glsl/TexRectFrag.glsl
index f70130fdc..c52bd7f58 100644
--- a/src/lib/graphics/TwkGLF/glsl/TexRectFrag.glsl
+++ b/src/lib/graphics/TwkGLF/glsl/TexRectFrag.glsl
@@ -3,6 +3,8 @@
 // 
 // SPDX-License-Identifier: Apache-2.0 
 //
+#extension GL_ARB_texture_rectangle : require
+
 #if __VERSION__ >= 150
 out vec4 FragColor; 
 #define FRAGCOLOR FragColor
@@ -11,8 +13,6 @@ out vec4 FragColor;
 #define in varying
 #endif
 
-#extension GL_ARB_texture_rectangle : require
-
 uniform sampler2DRect texture0;
 in vec2 TexCoord0;