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[client] egl: use new EGL damage count semantics

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After the damage queue PR, EGL damage count 0 means no change, and -1 means
invalidate the entire window. However, several other places have different
semantics, and we are not handling them correctly:

1. KVMFR uses 0 to signal invalidating the entire frame, so if we receive 0
   rectangles in egl_on_frame, we should set damage count to -1.
2. The damage overlay treated 0 as full damage, which is now incorrect. This
   is fixed, and now it treats 0 as no update, and -1 as full damage.
This commit is contained in:
Quantum
2021-08-01 21:01:24 -04:00
committed by Geoffrey McRae
parent 8d78a5aa95
commit 5d5e4ede1a
2 changed files with 4 additions and 3 deletions
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3
client/renderers/EGL/egl.c
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@@ -514,7 +514,8 @@ static bool egl_on_frame(void * opaque, const FrameBuffer * frame, int dmaFd,
INTERLOCKED_SECTION(this->desktopDamageLock, {
struct DesktopDamage * damage = this->desktopDamage + this->desktopDamageIdx;
if (damage->count == -1 || damage->count + damageRectsCount >= KVMFR_MAX_DAMAGE_RECTS)
if (damage->count == -1 || damageRectsCount == 0 ||
damage->count + damageRectsCount >= KVMFR_MAX_DAMAGE_RECTS)
damage->count = -1;
else
{