[patch 1/2, try 2] wined3d: rewrite IWineD3DSurfaceImpl_BltOverride colorfill codepath

[Alexander Dorofeyev]

Hello.

I'm not sure why previous patch set wasn't committed, but, as Stefan Dösinger
adviced I merged two patches so that there're less patches. This change is
needed, because

1) ActivateContext gets called within ENTER_GL/LEAVE_GL
2) there are redundant glDrawBuffer calls repeating what ActivateContext should do
3) IWineD3DDeviceImpl_Clear does ActivateContext with a different surface than
what IWineD3DSurfaceImpl_BltOverride needs to clear, so in won't work properly
in many situations, for example any colorfill blt's to front buffer in
double-buffered ddraw application will go to back buffer instead.

---
   dlls/wined3d/device.c          |  162 ++++++++++++++++++++++++++++++++++++++++
   dlls/wined3d/surface.c         |   51 ++++---------
   dlls/wined3d/wined3d_private.h |    3 +
   3 files changed, 179 insertions(+), 37 deletions(-)

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