Files @ r23882:d683a0787bc9
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Location: cpp/openttd-patchpack/source/media/extra_grf/canals.png

Nikolas Nyby
Codechange: Don't use SDL_CreateRGBSurfaceWithFormat()

This function requires libSDL 2.0.5 or higher. It looks like we don't
need to use it, and can just use the original SDL_CreateRGBSurface(),
with the masks set to 0, to trigger the default 8-bit format, which is
SDL_PIXELFORMAT_INDEX8.

Closes #7785

Note: this code path is activated by using an 8-bit blitter, like:

./bin/openttd -b 8bpp-simple