libkwineffects/openglcontext: require support for 3D textures

They will be used in the drm backend for ICC profiles.

src/libkwineffects/openglcontext.cpp

@@ -111,6 +111,7 @@ bool OpenGlContext::checkSupported() const
 {
     const bool supportsGLSL = m_isOpenglES || (hasOpenglExtension("GL_ARB_shader_objects") && hasOpenglExtension("GL_ARB_fragment_shader") && hasOpenglExtension("GL_ARB_vertex_shader"));
     const bool supportsNonPowerOfTwoTextures = m_isOpenglES || hasOpenglExtension("GL_ARB_texture_non_power_of_two");
-    return supportsGLSL && supportsNonPowerOfTwoTextures;
+    const bool supports3DTextures = !m_isOpenglES || hasVersion(Version(3, 0)) || hasOpenglExtension("GL_OES_texture_3D");
+    return supportsGLSL && supportsNonPowerOfTwoTextures && supports3DTextures;
 }
 }