[android-developers] Re: OpenGL glScissor not working on HTC phones

>I do not do a gl.glClear(GL10.GL_COLOR_BUFFER_BIT); so the bits that were drawn previously should remain.

Actually this isn't the default behavior.

I think you need to request EGL_BUFFER_PRESERVED for the
EGL_SWAP_BEHAVIOR.

Unfortunately this currently (froyo) isn't possible because Android
only supports EGL 1.0 + some extensions.

The eglSurfaceAttrib() API entry point was added at a later version of
EGL.

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