player/LuaPlayer: Fix alpha blending in the underlying SDL_texture

TeleMidia / ginga

A Ginga iTV middleware implementation by TeleMídia/PUC-Rio

http://ginga.org.br

GNU General Public License v2.0

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Closed gflima closed 7 years ago

gflima commented 7 years ago

Cairo uses pre-multiplied alpha, while SDL2 assumes standard alpha.

alanlivio commented 7 years ago

Is this can fix the bug #23 about chromakey behavior?

gflima commented 7 years ago

I don't know. We need to test some of the affect apps. But I think this chromaKey stuff is not related to alpha blending.