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DrawList: AddRect: avoid altering rounding on StrokeOutside when initial value if 0 + comments

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ocornut
2026-05-05 20:18:03 +02:00
parent 13ddadb688
commit 04d215c604
1 changed files with 6 additions and 1 deletions
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7
imgui_draw.cpp
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@@ -1744,17 +1744,22 @@ void ImDrawList::AddRect(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, fl
int s_rounding = (int)(rounding / _FringeScale);
int s_thickness = (int)(thickness / _FringeScale);
// AddRectBaked() renders the stroke inside the rectangle, so we need to adjust the outside case
// This branch does not handle the center, since odd thickness strokes are not pixel aligned, even if the rectangle is.
ImVec2 s_min = p_min;
ImVec2 s_max = p_max;
if (stroke_pos == ImDrawFlags_StrokeOutside)
{
s_min -= ImVec2(thickness, thickness);
s_max += ImVec2(thickness, thickness);
s_rounding += s_thickness;
if (s_rounding != 0.0f)
s_rounding += s_thickness;
}
// FIXME-WIP: Why isn't rounding offset in the _StrokeInside case?
if (s_rounding <= 0 || (flags & ImDrawFlags_RoundCornersMask_) == ImDrawFlags_RoundCornersNone)
{
// FIXME-WIP: This could use half the number of vertices.
const float t = (float)s_thickness * _FringeScale;
PrimReserve(6*4, 4*4);
PrimRect(ImVec2(p_min.x, p_min.y), ImVec2(p_max.x, p_min.y + t), col);