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[client] round overlay damage outward

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Expand ImGui window damage to include its border and round both logical
window bounds and framebuffer-scaled bounds outward.

This prevents a one-pixel strip of stale desktop content when an
overlay window is resized at fractional positions or display scales.
This commit is contained in:
Geoffrey McRae
2026-08-03 23:34:04 +10:00
parent fbe08d00ce
commit cb5b9ab292
4 changed files with 31 additions and 12 deletions
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8
client/src/app.c
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@@ -30,6 +30,7 @@
#include "kb.h"
#include "common/debug.h"
#include "common/rects.h"
#include "common/stringutils.h"
#include "interface/overlay.h"
#include "overlays.h"
@@ -1073,12 +1074,7 @@ render_again:
buffer, MAX_OVERLAY_RECTS);
for (int i = 0; i < written; ++i)
{
buffer[i].x *= g_state.windowScale;
buffer[i].y *= g_state.windowScale;
buffer[i].w *= g_state.windowScale;
buffer[i].h *= g_state.windowScale;
}
rectScaleOutward(buffer + i, g_state.windowScale);
// It is an error to run out of rectangles, because we will not be able to
// correctly calculate the damage of the next frame.