Fixed bugs 2677 and 2625, made it possible to lock render targets in D3D
Added SDL_round(), contributed by Benoit Pierre - thanks!
Fixed bug 2687 - SDL_BlitScaled does not handle clipping correctly

Patch from Benoit Pierre:

video: fix clipping handling in SDL_UpperBlitScaled

- honor destination clipping rectangle
- update both destination and source rectangles when clipping source
  rectangle to source surface and destination rectangle to destination
  clip rectangle
- don't change scaling factors when clipping

N.B.:

- when no scaling is involved (source and destination width/height are
  the same), SDL_UpperBlit is used (so SDL_BlitScaled behaves like
  SDL_BlitSurface)
- the final destination rectangle after all clipping is performed is
  saved back to dstrect (like for SDL_UpperBlit)
Fixed bug 2683 - Raspberry PI support using CMake

Tobias Himmer

this patch adds a check to the CMake build script to detect whether the VideoCore API is available.
If it is found, it enables SDL_VIDEO_DRIVER_RPI and will also add the needed include/library directory flags to CMAKE_C_FLAGS so the subsequent check for GLES succeeds in picking up the headers.

Seems to work fine on Raspbian.
Fixed bug 2681 - dereference a NULL pointer dst_fmt in SDL_CreateTextureFromSurface function

Nitz

In SDL_CreateTextureFromSurface:

SDL_PixelFormat *dst_fmt;
/* Set up a destination surface for the texture update */
         dst_fmt = SDL_AllocFormat(format);
            temp = SDL_ConvertSurface(surface, dst_fmt, 0);

Here is need of NULL check for dst_fmt because there are chances of NULL return from SDL_AllocFormat(format);