I found that when I switch desktops, GetRenderTargetData will return D3DERR_DEVICELOST. It is unclear to me whether ReadPixels should report a GL error in this case and if so, which one. I went with GL_OUT_OF_MEMORY. Let me know if that's wrong.

This change is not sufficient to make eglGetError report EGL_CONTEXT_LOST. For a program doing exclusively offscreen rendering, ReadPixels might be the only place where D3DERR_DEVICELOST can be detected. The GLES code can't call egl::setCurrentError though. I'm not sure how to fix that.




Review URL: http://codereview.appspot.com/1692053

git-svn-id: https://angleproject.googlecode.com/svn/trunk@350 736b8ea6-26fd-11df-bfd4-992fa37f6226