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DrawList: added StrokePos flags: ImDrawFlags_StrokeInside, ImDrawFlags_StrokeOutside, ImDrawFlags_StrokeCenter, ImDrawFlags_StrokeLegacy.

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This commit is contained in:
Mikko Mononen
2026-04-28 18:14:34 +02:00
committed by ocornut
parent 76184b6308
commit 484da7ed55
2 changed files with 75 additions and 14 deletions
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72
imgui_draw.cpp
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@@ -1507,7 +1507,7 @@ void ImDrawList::AddLine(const ImVec2& p1, const ImVec2& p2, ImU32 col, float th
AddPolyline(points, 2, col, thickness);
}
void ImDrawList::AddLineH(float min_x, float max_x, float y, ImU32 col, float thickness)
void ImDrawList::AddLineH(float min_x, float max_x, float y, ImU32 col, float thickness, ImDrawFlags flags)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
@@ -1519,6 +1519,11 @@ void ImDrawList::AddLineH(float min_x, float max_x, float y, ImU32 col, float th
return;
}
ImDrawFlags stroke_pos = (flags & ImDrawFlags_StrokeMask_);
if (stroke_pos == ImDrawFlags_StrokeCenter)
y -= thickness * 0.5f;
else if (stroke_pos == ImDrawFlags_StrokeOutside)
y -= thickness;
if (ImIsTruncated4(min_x, max_x, y, thickness))
{
PrimReserve(6, 4);
@@ -1530,7 +1535,7 @@ void ImDrawList::AddLineH(float min_x, float max_x, float y, ImU32 col, float th
}
}
void ImDrawList::AddLineV(float x, float min_y, float max_y, ImU32 col, float thickness)
void ImDrawList::AddLineV(float x, float min_y, float max_y, ImU32 col, float thickness, ImDrawFlags flags)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
@@ -1542,6 +1547,11 @@ void ImDrawList::AddLineV(float x, float min_y, float max_y, ImU32 col, float th
return;
}
ImDrawFlags stroke_pos = (flags & ImDrawFlags_StrokeMask_);
if (stroke_pos == ImDrawFlags_StrokeCenter)
x += thickness * 0.5f;
else if (stroke_pos == ImDrawFlags_StrokeOutside)
x -= thickness;
if (ImIsTruncated4(x, min_y, max_y, thickness))
{
PrimReserve(6, 4);
@@ -1582,7 +1592,20 @@ void ImDrawList::AddRect(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, fl
}
const ImVec2 offset(thickness * 0.5f, thickness * 0.5f);
PathRect(p_min + offset, p_max - offset, rounding - thickness * 0.5f, flags);
const ImDrawFlags stroke_pos = (flags & ImDrawFlags_StrokeMask_);
if (stroke_pos == ImDrawFlags_StrokeInside)
PathRect(p_min + offset, p_max - offset, rounding - thickness * 0.5f, flags);
else if (stroke_pos == ImDrawFlags_StrokeCenter)
PathRect(p_min, p_max, rounding, flags);
else if (stroke_pos == ImDrawFlags_StrokeOutside)
PathRect(p_min - offset, p_max + offset, rounding + thickness * 0.5f, flags);
else if (stroke_pos == ImDrawFlags_StrokeLegacy)
{
if (Flags & ImDrawListFlags_AntiAliasedLines)
PathRect(p_min + ImVec2(0.50f, 0.50f), p_max - ImVec2(0.50f, 0.50f), rounding, flags);
else
PathRect(p_min + ImVec2(0.50f, 0.50f), p_max - ImVec2(0.49f, 0.49f), rounding, flags); // Better looking lower-right corner and rounded non-AA shapes.
}
PathStroke(col, thickness, ImDrawFlags_Closed);
}
@@ -1664,15 +1687,26 @@ void ImDrawList::AddTriangleFilled(const ImVec2& p1, const ImVec2& p2, const ImV
PathFillConvex(col);
}
void ImDrawList::AddCircle(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness)
void ImDrawList::AddCircle(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness, ImDrawFlags flags)
{
if ((col & IM_COL32_A_MASK) == 0 || radius < 0.5f)
return;
if (g_LEGACY_STROKES)
{
radius -= 0.5f;
}
else
radius -= thickness * 0.5f;
{
const ImDrawFlags stroke_pos = (flags & ImDrawFlags_StrokeMask_);
if (stroke_pos == ImDrawFlags_StrokeInside)
radius -= thickness * 0.5f;
else if (stroke_pos == ImDrawFlags_StrokeOutside)
radius += thickness * 0.5f;
else if (stroke_pos == ImDrawFlags_StrokeLegacy)
radius -= 0.5f;
}
if (num_segments <= 0)
{
// Use arc with automatic segment count
@@ -1717,15 +1751,25 @@ void ImDrawList::AddCircleFilled(const ImVec2& center, float radius, ImU32 col,
}
// Guaranteed to honor 'num_segments'
void ImDrawList::AddNgon(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness)
void ImDrawList::AddNgon(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness, ImDrawFlags flags)
{
if ((col & IM_COL32_A_MASK) == 0 || num_segments <= 2)
return;
if (g_LEGACY_STROKES)
{
radius -= 0.5f;
}
else
radius -= thickness * 0.5f;
{
const ImDrawFlags stroke_pos = (flags & ImDrawFlags_StrokeMask_);
if (stroke_pos == ImDrawFlags_StrokeInside)
radius -= thickness * 0.5f;
else if (stroke_pos == ImDrawFlags_StrokeOutside)
radius += thickness * 0.5f;
else if (stroke_pos == ImDrawFlags_StrokeLegacy)
radius -= 0.5f;
}
// Because we are filling a closed shape we remove 1 from the count of segments/points
const float a_max = (IM_PI * 2.0f) * ((float)num_segments - 1.0f) / (float)num_segments;
@@ -1746,16 +1790,26 @@ void ImDrawList::AddNgonFilled(const ImVec2& center, float radius, ImU32 col, in
}
// Ellipse
void ImDrawList::AddEllipse(const ImVec2& center, const ImVec2& radius, ImU32 col, float rot, int num_segments, float thickness)
void ImDrawList::AddEllipse(const ImVec2& center, const ImVec2& radius, ImU32 col, float rot, int num_segments, float thickness, ImDrawFlags flags)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
ImVec2 r;
if (g_LEGACY_STROKES)
{
r = radius;
}
else
r = ImVec2(radius.x - thickness * 0.5f, radius.y - thickness * 0.5f);
{
r = radius;
ImDrawFlags stroke_pos = (flags & ImDrawFlags_StrokeMask_);
if (stroke_pos == ImDrawFlags_StrokeInside)
r -= ImVec2(thickness * 0.5f, thickness * 0.5f);
else if (stroke_pos == ImDrawFlags_StrokeOutside)
r += ImVec2(thickness * 0.5f, thickness * 0.5f);
}
if (num_segments <= 0)
num_segments = _CalcCircleAutoSegmentCount(ImMax(r.x, r.y)); // A bit pessimistic, maybe there's a better computation to do here.