My custom shader need to use GL_OES_EGL_image_external extension in fragment shader.But on Unity5.1.1,the shader complier add a line “precision highp float;” automatically at the beginning of fragment shader,which causes shader compile error on Mali-T624 GPU.What can I do to make shader compiler don’t add that line for me?Thanks!
By the way,this same shader works fine on Unity 4.6.1.