[Tizen] Change the precision of position in text atlas shader

There are some visual artifact when too many glyhps in editable text.
Change mediump to highp to fix issue.

Change-Id: I0f89447160f6bce0107c6ae5de5efeb9b4436afc
Signed-off-by: Bowon Ryu <bowon.ryu@samsung.com>

diff --git a/dali-toolkit/internal/graphics/shaders/text-atlas-shader.vert b/dali-toolkit/internal/graphics/shaders/text-atlas-shader.vert
index 388f0c2..0d2d621 100644 (file)
--- a/dali-toolkit/internal/graphics/shaders/text-atlas-shader.vert
+++ b/dali-toolkit/internal/graphics/shaders/text-atlas-shader.vert
@@ -1,4 +1,4 @@
-attribute mediump vec2    aPosition;
+attribute   highp vec2    aPosition;
 attribute mediump vec2    aTexCoord;
 attribute mediump vec4    aColor;
 uniform   mediump vec2    uOffset;
@@ -8,7 +8,7 @@ varying   mediump vec4    vColor;
 
 void main()
 {
-  mediump vec4 position = vec4( aPosition.xy + uOffset, 0.0, 1.0 );
+  highp vec4 position = vec4( aPosition.xy + uOffset, 0.0, 1.0 );
   gl_Position = uMvpMatrix * position;
   vTexCoord = aTexCoord;
   vColor = aColor;