make initial window size depend on UI scaling factor

replace ugly backdrop texture

first idea of what the main scene could look like

add asc_create_flags() utility function

simplify build and copy assets to build dir

simplify how pre-defined shader IDs work

prevent attempts to load a shader again that already failed before

(0) -100 -30 -10 -7 +7 +10 +30 tip

mercurial