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DrawList: skip PathLineTo/PathStroke calls for common AddLine(), AddLineH(), AddLineV() functions. (#4091)

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ocornut
2026-05-28 15:37:29 +02:00
parent 783eba926f
commit 33bb693b4c
2 changed files with 8 additions and 9 deletions
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2
docs/CHANGELOG.txt
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@@ -55,6 +55,8 @@ Other Changes:
- Fonts:
- Added `IMGUI_DISABLE_DEFAULT_FONT_BITMAP`/`IMGUI_DISABLE_DEFAULT_FONT_VECTOR` to
disable embedding either fonts separately. (#9407)
- DrawList:
- Minor optimization to AddLine(), AddLineH(), AddLineV() functions. (#4091)
- Demo:
- Extract 'Widgets->Tree Nodes->Selectable Nodes' out of the 'Advanced'
demo for clarity (manual reimplementation of basic selection).

15
imgui_draw.cpp
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@@ -1480,27 +1480,24 @@ void ImDrawList::AddLine(const ImVec2& p1, const ImVec2& p2, ImU32 col, float th
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(p1 + ImVec2(0.5f, 0.5f));
PathLineTo(p2 + ImVec2(0.5f, 0.5f));
PathStroke(col, thickness);
const ImVec2 points[2] = { ImVec2(p1.x + 0.5f, p1.y + 0.5f), ImVec2(p2.x + 0.5f, p2.y + 0.5f) };
AddPolyline(points, 2, col, thickness);
}
void ImDrawList::AddLineH(float min_x, float max_x, float y, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(ImVec2(min_x + 0.5f, y + 0.5f)); // Same as AddLine() above.
PathLineTo(ImVec2(max_x + 0.5f, y + 0.5f));
PathStroke(col, thickness);
const ImVec2 points[2] = { ImVec2(min_x + 0.5f, y + 0.5f), ImVec2(max_x + 0.5f, y + 0.5f) }; // Same as AddLine() above.
AddPolyline(points, 2, col, thickness);
}
void ImDrawList::AddLineV(float x, float min_y, float max_y, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(ImVec2(x + 0.5f, min_y + 0.5f)); // Same as AddLine() above.
PathLineTo(ImVec2(x + 0.5f, max_y + 0.5f));
PathStroke(col, thickness);
const ImVec2 points[2] = { ImVec2(x + 0.5f, min_y + 0.5f), ImVec2(x + 0.5f, max_y + 0.5f) }; // Same as AddLine() above.
AddPolyline(points, 2, col, thickness);
}
// p_min = upper-left, p_max = lower-right