// The precision qualifiers are useful on OpenGL/ES systems,
// but usually not present on desktop systems. Define the
// keywords to empty strings on desktop systems.
-#ifndef QT_OPENGL_ES
+#if !defined(QT_OPENGL_ES) || defined(QT_OPENGL_FORCE_SHADER_DEFINES)
#define QGL_DEFINE_QUALIFIERS 1
static const char qualifierDefines[] =
"#define lowp\n"
"#define mediump\n"
"#define highp\n";
-#endif
+
+#else
// The "highp" qualifier doesn't exist in fragment shaders
// on all ES platforms. When it doesn't exist, use "mediump".
-#ifdef QT_OPENGL_ES
#define QGL_REDEFINE_HIGHP 1
static const char redefineHighp[] =
"#ifndef GL_FRAGMENT_PRECISION_HIGH\n"