[4.0] Fixed Text texture quality issue when auto scrolling

 - When using emoji, an unknown line appears at the top of the texture.
 - Add exception handling code to shader code

Change-Id: Ie8368fdff2208ba3c5107b99b88bd9007cd2cf58

diff --git a/dali-toolkit/internal/text/text-scroller.cpp b/dali-toolkit/internal/text/text-scroller.cpp
index f8089a2..c60e2db 100644 (file)
--- a/dali-toolkit/internal/text/text-scroller.cpp
+++ b/dali-toolkit/internal/text/text-scroller.cpp
@@ -93,7 +93,7 @@ const char* FRAGMENT_SHADER = DALI_COMPOSE_SHADER(
   \n
   void main()\n
   {\n
-    if ( vTexCoord.y > 1.0 )\n
+    if ( vTexCoord.y > 1.0 || vTexCoord.y < 0.0 )\n
       discard;\n
     \n
     mediump vec4 textTexture = texture2D( sTexture, vTexCoord );\n