152 	std::ostringstream fragSrc;  in init()  local
153 	fragSrc << "#version 300 es\n";  in init()
154 	fragSrc << "layout(location = 0) out mediump vec4 o_color;\n";  in init()
155 	fragSrc << "in mediump vec2 v_coords;\n";  in init()
158 …fragSrc << "uniform " << glu::getPrecisionName(samplerPrec) << " " << glu::getDataTypeName(sampler…  in init()
160 	fragSrc << "void main (void)\n"  in init()
166 			fragSrc << "\t" << glu::getPrecisionName(samplerPrec) << " vec4 r = ";  in init()
168 			fragSrc << "\tr += ";  in init()
171 			fragSrc << "vec4(";  in init()
173 		fragSrc << "texture(u_sampler" << texNdx << ", v_coords)";  in init()
176 			fragSrc << ")";  in init()
178 		fragSrc << ";\n";  in init()
181 	fragSrc << "	o_color = r;\n"  in init()
184 	m_fragShaderSource = fragSrc.str();  in init()