fix the OpenGL offscreen rendering a bit
fix the OpenGL offscreen rendering a bit

Change-Id: I1f11cdff0de48e3281a58aec9ea37a78c637195e

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core