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-rw-r--r--vcl/opengl/areaScaleFragmentShader.glsl6
1 files changed, 6 insertions, 0 deletions
diff --git a/vcl/opengl/areaScaleFragmentShader.glsl b/vcl/opengl/areaScaleFragmentShader.glsl
index 03fbe691c65b..498b0b53ec4b 100644
--- a/vcl/opengl/areaScaleFragmentShader.glsl
+++ b/vcl/opengl/areaScaleFragmentShader.glsl
@@ -7,6 +7,12 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
+#version 120
+#if __VERSION__ < 130
+int min( int a, int b ) { return a < b ? a : b; }
+float min( float a, float b ) { return a < b ? a : b; }
+#endif
+
/* TODO Use textureOffset for newest version of GLSL */
uniform sampler2D sampler;