Hi,Rob
thanks for your reply.
yes, It can be loaded if I drop the size to 2048x600. and the Direct3d level is D3D_FEATURE_LEVEL_9_1 in the arm.
Can I load the picture that it's size is larger than the size(2048x600) in the machine that it's Direct3d level is D3D_FEATURE_LEVEL_9_1? Is there any solution?