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[client] egl: retain damage until texture is drawable

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Treat a failed desktop texture bind as an incomplete render so full target
restoration remains latched until a frame can actually be drawn.

Carry retired damage into the pending record when the drawable texture does
not contain it, closing the publication gap between texture slots and their
matching damage metadata.
This commit is contained in:
Geoffrey McRae
2026-08-05 18:04:26 +10:00
parent 3e08d1f34f
commit 13a34b383d
3 changed files with 59 additions and 9 deletions
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56
client/renderers/EGL/egl.c
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@@ -1300,6 +1300,31 @@ static int egl_mergeSurfaceDamage(struct Rect * damage, int count)
return count;
}
static void egl_requeueDesktopDamage(
struct Inst * this, const struct DesktopDamage * damage)
{
if (damage->count == 0)
return;
INTERLOCKED_SECTION(this->desktopDamageLock, {
struct DesktopDamage * pending =
this->desktopDamage + this->desktopDamageIdx;
if (damage->count < 0 || pending->count < 0 ||
damage->count + pending->count >= LG_MAX_FRAME_DAMAGE_RECTS)
pending->count = -1;
else
{
memcpy(pending->rects + pending->count, damage->rects,
damage->count * sizeof(FrameDamageRect));
pending->count += damage->count;
}
if (pending->frameToken == LG_RENDERER_FRAME_TOKEN_NONE)
pending->frameToken = damage->frameToken;
});
}
inline static void renderLetterBox(struct Inst * this)
{
bool hLB = this->destRect.x > 0;
@@ -1461,10 +1486,11 @@ static bool egl_render(LG_Renderer * renderer, LG_RendererRotate rotate,
bool deferredLogicalCursor = false;
const bool haveDesktop = likely(
this->destRect.w > 0 && this->destRect.h > 0);
bool desktopRendered = false;
const uint64_t desktopStart = nanotime();
uint64_t effectsTime = 0;
LG_RendererFrameToken frameToken = LG_RENDERER_FRAME_TOKEN_NONE;
bool desktopRendered = false;
const uint64_t desktopStart = nanotime();
uint64_t effectsTime = 0;
LG_RendererFrameToken frameToken = LG_RENDERER_FRAME_TOKEN_NONE;
LG_RendererFrameToken renderedFrameToken = LG_RENDERER_FRAME_TOKEN_NONE;
timing->setupTime = desktopStart - setupStart;
if (haveDesktop)
@@ -1474,8 +1500,8 @@ static bool egl_render(LG_Renderer * renderer, LG_RendererRotate rotate,
this->translateX, this->translateY,
this->scaleX , this->scaleY ,
this->scaleType , rotate, renderAll ? NULL : accumulated,
desktopDamage->frameToken, frameTokenLimit, &fullFrame, &frameToken,
&effectsTime,
desktopDamage->frameToken, frameTokenLimit, &fullFrame,
&frameToken, &renderedFrameToken, &effectsTime,
egl_hdrComposeGetFramebuffer(this->hdrCompose));
}
const uint64_t composeStart = nanotime();
@@ -1489,8 +1515,10 @@ static bool egl_render(LG_Renderer * renderer, LG_RendererRotate rotate,
else
timing->setupTime += composeStart - desktopStart;
timing->frameToken = frameToken;
const bool frameConsumed = frameToken != LG_RENDERER_FRAME_TOKEN_NONE;
const bool frameConsumed = desktopRendered &&
frameToken != LG_RENDERER_FRAME_TOKEN_NONE;
timing->frameToken = frameConsumed ?
frameToken : LG_RENDERER_FRAME_TOKEN_NONE;
if (haveDesktop)
{
@@ -1510,6 +1538,18 @@ static bool egl_render(LG_Renderer * renderer, LG_RendererRotate rotate,
if (fullFrame)
desktopDamage->count = -1;
/* A texture slot can be published before its matching damage and timing
* record. If this render could not consume that slot, retain the damage so
* it is merged into the next drawable frame instead of retiring it. */
const bool damageRendered = desktopRendered &&
(desktopDamage->frameToken == LG_RENDERER_FRAME_TOKEN_NONE ||
desktopDamage->frameToken == renderedFrameToken ||
((renderAll || fullFrame) &&
renderedFrameToken != LG_RENDERER_FRAME_TOKEN_NONE &&
renderedFrameToken > desktopDamage->frameToken));
if (!damageRendered)
egl_requeueDesktopDamage(this, desktopDamage);
renderLetterBox(this);
hasOverlay |=