Fill with the background color first only if the background color is
opaque. This is necessary for subpixel rendering to work properly (it
does not work on top of transparency).
However, if the background color is not opaque, leave the buffer
unfilled (completely transparent) since the background is already
rendered by the scene element underneath. In this case we have to
disable subpixel rendering.
v2: use 0.999 alpha cutoff and fix CodeStyleCheck
Fixes: (the rest of) #1684
...to search for functions which have been banned from our code base,
because they're too easy to misuse, and even if used correctly,
complicate audits, cause inconsistencies and/or make static analysis
harder.
This makes the code a bit more readable IMHO (and forces us to be
consistent with event handler function names).
Adjust scripts/checkpatch.pl to not complain.
Coding style specific changes include:
- Accept pango, glib and libxml2 CamelCase variables
- Remove "need consistent spacing around '*'" warning
- Do not warn about "structs that should be const"
- Do not warn on braces {} around single statements
- Do not warn about braces {} for single statement blocks
- Do not warn about wanting { on previous line for functions
- Remove check for missing blank line after declaration
- Ignore SPLIT_STRING COMPLEX_MACRO PREFER_KERNEL_TYPES
LOGICAL_CONTINUATIONS PARENTHESIS_ALIGNMENT OPEN_ENDED_LINE
MACRO_ARG_REUSE PREFER_FALLTHROUGH ARRAY_SIZE INITIALISED_STATIC
Other changes include:
- Do not complain about missing spelling.txt
- Print filename for each file, but no summary line
