Method AddRectFilledMultiColor

core/src/imgui/imgui_draw.cpp:1403–1416

p_min = upper-left, p_max = lower-right

// p_min = upper-left, p_max = lower-right
void ImDrawList::AddRectFilledMultiColor(const ImVec2& p_min, const ImVec2& p_max, ImU32 col_upr_left, ImU32 col_upr_right, ImU32 col_bot_right, ImU32 col_bot_left)
{
    if (((col_upr_left | col_upr_right | col_bot_right | col_bot_left) & IM_COL32_A_MASK) == 0)
        return;

    const ImVec2 uv = _Data->TexUvWhitePixel;
    PrimReserve(6, 4);
    PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 1)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 2));
    PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 2)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx + 3));
    PrimWriteVtx(p_min, uv, col_upr_left);
    PrimWriteVtx(ImVec2(p_max.x, p_min.y), uv, col_upr_right);
    PrimWriteVtx(p_max, uv, col_bot_right);
    PrimWriteVtx(ImVec2(p_min.x, p_max.y), uv, col_bot_left);
}

void ImDrawList::AddQuad(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, ImU32 col, float thickness)
{