Various blitting related cleanups (#4789)

* Fix the "Enable debug logging" checkbox so that it properly disables "Enable verbose debug logging" when it gets disabled
* Avoid asking ImageWidget for alpha-blending when it's not useful
* Make ImageWidget's alpha-blending code-path double-check that alpha-blending actually is needed, and avoid it if possible
* In the same vein, only do alpha-blending in textboxwidget when absolutely necessary
* Prefer color constants over the gray() method, ensuring that they're part of the eInk palette

Depends on https://github.com/koreader/koreader-base/pull/853

Fix #4774
This commit is contained in:
NiLuJe
2019-03-14 20:58:45 +01:00
committed by Frans de Jonge
parent 1045bf8946
commit 2011cf1ad1
39 changed files with 112 additions and 103 deletions

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