Set sampler precision in shifted distance field text shader

The precision would default to lowp and we would attempt to
call smoothstep(mediump, mediump, lowp) which was a
non-existent overload on some drivers, thus causing a compiler
failure. We can use mediump for the sampler, like in the
regular distance field shader.

Task-number: QTBUG-35122
Change-Id: Ib50325d48fe7e0d25559da97e7f53e5170f705a1
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/quick/scenegraph/shaders/distancefieldshiftedtext.frag b/src/quick/scenegraph/shaders/distancefieldshiftedtext.frag
index 60c1c7468b..42fead8713 100644
--- a/src/quick/scenegraph/shaders/distancefieldshiftedtext.frag
+++ b/src/quick/scenegraph/shaders/distancefieldshiftedtext.frag
@@ -1,7 +1,7 @@
 varying highp vec2 sampleCoord;
 varying highp vec2 shiftedSampleCoord;
 
-uniform sampler2D _qt_texture;
+uniform mediump sampler2D _qt_texture;
 uniform lowp vec4 color;
 uniform lowp vec4 styleColor;
 uniform mediump float alphaMin;