D27788: Implement EGL_KHR_partial_update and EGL_EXT_swap_buffers_with_damage

zzag added inline comments.

INLINE COMMENTS

> scene.cpp:234-235
>  
> +    damaged_region = QRegion(QRect {{}, screens()->size()});
> +    aboutToStartPainting(damaged_region);
> +

So, when the slide effect is active, aboutToStartPainting() may be called up to 4 times. We have to check m_paintScreenCount before calling aboutToStartPainting().

> scene.cpp:353-358
> +    aboutToStartPainting(dirtyArea);
> +
>      QRegion paintedArea;
>      // Fill any areas of the root window not covered by opaque windows
> +    if (m_paintScreenCount == 1) {
> +        aboutToStartPainting(dirtyArea);

aboutToStartPainting() should not be called twice.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D27788

To: apol, #kwin, #plasma:_mobile
Cc: mwolff, zzag, davidedmundson, kwin, Orage, cacarry, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart