I had migrated SDL 2.0 with OpenGL ES 2.0 to Windows CE 6.0

hi,all
I had migrated SDL 2.0 with OpenGL ES 2.0 to Windows CE 6.0(CPU:ARM 11
TCC890x, GPU:MALI 200) some days ago, it works fine now, but
glBindFramebuffer takes 124 ms in function GLES2_SetRenderTarget at file
SDL_render_gles2.c, it takes too long to me.
If some one need the source codes, please send me email, I’ll paste the
codes here as long as I finished this migration totally.
If some one knows how to resolve the problem said above, please tell
me, I’ll appreciate your help,BTW.

thank you.

PS.:
1. I wanted to migrate SDL 2.0 OpenGL ES 1.1 to Windows CE originally,
but I failed, because there missed some important functions declared in
GLES/gl.h or exported from libGLESv1_CM.dll, such as
“glFramebufferTexture2DOES”, so I had to turn to OpenGL ES 2.0.
2. I had referred to the following link to resolve the problem said
above, and I failed too: