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[client] egl: use buffer age extension to render only damaged parts

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We avoid rendering any area that has not changed since the buffer was used
and also not covered by an overlay.
This commit is contained in:
Quantum
2021-08-02 21:37:58 -04:00
committed by Geoffrey McRae
parent f9977332a6
commit 87aac8cf03
3 changed files with 144 additions and 22 deletions
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19
client/src/util.c
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@@ -225,13 +225,12 @@ static bool rectIntersects(const FrameDamageRect * r1, const FrameDamageRect * r
r2->y + r1->height > r2->y;
}
int util_mergeOverlappingRects(FrameDamageRect * out, const FrameDamageRect * rects, int count)
int util_mergeOverlappingRects(FrameDamageRect * rects, int count)
{
bool removed[count];
bool changed;
memset(removed, 0, sizeof(removed));
memcpy(out, rects, count * sizeof(FrameDamageRect));
do
{
@@ -239,14 +238,14 @@ int util_mergeOverlappingRects(FrameDamageRect * out, const FrameDamageRect * re
for (int i = 0; i < count; ++i)
if (!removed[i])
for (int j = i + 1; j < count; ++j)
if (!removed[j] && rectIntersects(out + i, out + j))
if (!removed[j] && rectIntersects(rects + i, rects + j))
{
uint32_t x2 = max(out[i].x + out[i].width, out[j].x + out[j].width);
uint32_t y2 = max(out[i].y + out[i].height, out[j].y + out[j].height);
out[i].x = min(out[i].x, out[j].x);
out[i].y = min(out[i].y, out[j].y);
out[i].width = x2 - out[i].x;
out[i].height = y2 - out[i].y;
uint32_t x2 = max(rects[i].x + rects[i].width, rects[j].x + rects[j].width);
uint32_t y2 = max(rects[i].y + rects[i].height, rects[j].y + rects[j].height);
rects[i].x = min(rects[i].x, rects[j].x);
rects[i].y = min(rects[i].y, rects[j].y);
rects[i].width = x2 - rects[i].x;
rects[i].height = y2 - rects[i].y;
removed[j] = true;
changed = true;
}
@@ -256,7 +255,7 @@ int util_mergeOverlappingRects(FrameDamageRect * out, const FrameDamageRect * re
int o = 0;
for (int i = 0; i < count; ++i)
if (!removed[i])
out[o++] = out[i];
rects[o++] = rects[i];
return o;
}