Implement a rotation hack, for adreno devices where landscape mode is broken due to a GPU driver bug. This renders the game in portrait mode and rotates the screen contents by 90 degrees, so it can be viewed in landscape mode.
Check if SDL is build with OpenGL and/or OpenGL ES support
merged adreno rotation hack
Merge branch 'krnlyng-adreno'
Merge pull request #16 from fayvel/gles2_fixes

Check if SDL is build with OpenGL and/or OpenGL ES2 support
Get rid of glEnable/glDisable(GL_TEXTURE_2D) from OGLES combiner -
is fixed-function
Merge pull request #18 from twinaphex/master

GLES2 fixes
remove ADRENO_ROTATION_HACK and introduce a config value (rotate) for haveing different possible rotation angles
rename config value rotate to Rotate and move it to the video general section. also introduce a new Makefile parameter CFG_DEFAULTS which can be used to select which config settings should be used by default (currently only for the jolla phone where Rotate=3, aspect=2 and Screen{Width,Height}={540,960} is required to properly render the game)
Merge pull request #20 from krnlyng/adreno

remove ADRENO_ROTATION_HACK