From Ognjen Kostic, "Some android phones have no support for OES_element_index_uint extension that is required if glDrawElements is to be called with GL_UNSIGNED_INT for element type.

In OSG 3.4, osgText::Text( ::_quadIndices) uses DrawElementsUInt that will fail on these devices and no text will appear - tested on Samsung Galaxy Trend 2 SM-G313HN.

When DrawElementsUInt is replaced with DrawElementsUShort it works, although I'm not sure if this can cause other problems with some fonts.

Fix:
- In include\osgText\Text, line 316:
        replace: "osg::ref_ptr< osg::DrawElementsUInt > _quadIndices;"
        with:    "osg::ref_ptr< osg::DrawElementsUShort > _quadIndices;"

- In src\osgText\Text.cpp, line 2094:
        replace: "_quadIndices = new DrawElementsUInt(PrimitiveSet::TRIANGLES);"
        with:    "_quadIndices = new DrawElementsUShort(PrimitiveSet::TRIANGLES);"
"

include/osgText/Text

@@ -313,7 +313,7 @@ public:
         osg::buffered_object<Coords3>   _transformedBackdropCoords[8];
         ColorCoords    _colorCoords;
 
-        osg::ref_ptr<osg::DrawElementsUInt> _quadIndices;
+        osg::ref_ptr<osg::DrawElementsUShort> _quadIndices;
         void updateQuadIndices();
 
         GlyphQuads();
@@ -336,7 +336,7 @@ public:
 
         LineNumbers& getLineNumbers() { return _lineNumbers; }
         const LineNumbers& getLineNumbers() const { return _lineNumbers; }
-        
+
         /** Resize any per context GLObject buffers to specified size. */
         void resizeGLObjectBuffers(unsigned int maxSize);
 
@@ -344,9 +344,9 @@ public:
         * the specified graphics context. Otherwise, releases OpenGL objexts
         * for all graphics contexts. */
         void releaseGLObjects(osg::State* state=0) const;
-        
+
     private:
-        
+
         GlyphQuads& operator = (const GlyphQuads&) { return *this; }
     };