Comments on not needing to use ImDrawFlags_RoundCornersAll.

docs/CHANGELOG.txt

@@ -64,6 +64,7 @@ Breaking Changes:
      The new order is also more convenient as `flags` are less frequently used than `thickness` in real code.
    - As a general policy in Dear ImGui, all our flags default to 0 so ImDrawFlags_None was likely written 0 in some call sites.
    - Consider adding `#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS` in your imconfig.h, even temporarily, to clean up legacy code.
+   - Reminder: you do NOT need to specify `ImDrawFlags_RoundCornersAll` for rounding, it is already the default!
 - DrawList: obsoleted `ImDrawCallback_ResetRenderState` in favor of using `ImGui::GetPlatformIO().DrawCallback_ResetRenderState`,
     which is part of our new standard draw callbacks. (#9378)
     Redirecting the earlier value into the later one when set, so both old and new code should work.

imgui.h

@@ -3245,19 +3245,23 @@ struct ImDrawListSplitter
 enum ImDrawFlags_
 {
     ImDrawFlags_None                        = 0,
-    ImDrawFlags_RoundCornersTopLeft         = 1 << 4, // AddRect(), AddRectFilled(), PathRect(): enable rounding top-left corner only (when rounding > 0.0f, we default to all corners). Was 0x01.
-    ImDrawFlags_RoundCornersTopRight        = 1 << 5, // AddRect(), AddRectFilled(), PathRect(): enable rounding top-right corner only (when rounding > 0.0f, we default to all corners). Was 0x02.
-    ImDrawFlags_RoundCornersBottomLeft      = 1 << 6, // AddRect(), AddRectFilled(), PathRect(): enable rounding bottom-left corner only (when rounding > 0.0f, we default to all corners). Was 0x04.
-    ImDrawFlags_RoundCornersBottomRight     = 1 << 7, // AddRect(), AddRectFilled(), PathRect(): enable rounding bottom-right corner only (when rounding > 0.0f, we default to all corners). Wax 0x08.
-    ImDrawFlags_RoundCornersNone            = 1 << 8, // AddRect(), AddRectFilled(), PathRect(): disable rounding on all corners (when rounding > 0.0f). This is NOT zero, NOT an implicit flag!
-    ImDrawFlags_Closed                      = 1 << 9, // PathStroke(), AddPolyline(): specify that shape should be closed (Important: this is always == 1 for legacy reason)
+
+    // Rounding for AddRect(), AddRectFilled(), PathRect()
+    // - When not specified, we defaults to ImDrawFlags_RoundCornersAll! So you only need to use those flags if you want another configuration.
+    ImDrawFlags_RoundCornersTopLeft         = 1 << 4, // Round top-left corner only (when rounding > 0.0f, we default to all corners).
+    ImDrawFlags_RoundCornersTopRight        = 1 << 5, // Round top-right corner only (when rounding > 0.0f, we default to all corners).
+    ImDrawFlags_RoundCornersBottomLeft      = 1 << 6, // Round bottom-left corner only (when rounding > 0.0f, we default to all corners).
+    ImDrawFlags_RoundCornersBottomRight     = 1 << 7, // Round bottom-right corner only (when rounding > 0.0f, we default to all corners).
+    ImDrawFlags_RoundCornersNone            = 1 << 8, // Disable rounding even if `float rounding > 0.0f`. This is NOT zero, NOT an implicit flag!
+    ImDrawFlags_RoundCornersAll             = ImDrawFlags_RoundCornersTopLeft | ImDrawFlags_RoundCornersTopRight | ImDrawFlags_RoundCornersBottomLeft | ImDrawFlags_RoundCornersBottomRight, // (Default!!)
+    ImDrawFlags_RoundCornersDefault_        = ImDrawFlags_RoundCornersAll, // Default to ALL corners if none of the _RoundCornersXX flags are specified!
     ImDrawFlags_RoundCornersTop             = ImDrawFlags_RoundCornersTopLeft | ImDrawFlags_RoundCornersTopRight,
     ImDrawFlags_RoundCornersBottom          = ImDrawFlags_RoundCornersBottomLeft | ImDrawFlags_RoundCornersBottomRight,
     ImDrawFlags_RoundCornersLeft            = ImDrawFlags_RoundCornersBottomLeft | ImDrawFlags_RoundCornersTopLeft,
     ImDrawFlags_RoundCornersRight           = ImDrawFlags_RoundCornersBottomRight | ImDrawFlags_RoundCornersTopRight,
-    ImDrawFlags_RoundCornersAll             = ImDrawFlags_RoundCornersTopLeft | ImDrawFlags_RoundCornersTopRight | ImDrawFlags_RoundCornersBottomLeft | ImDrawFlags_RoundCornersBottomRight,
-    ImDrawFlags_RoundCornersDefault_        = ImDrawFlags_RoundCornersAll, // Default to ALL corners if none of the _RoundCornersXX flags are specified.
     ImDrawFlags_RoundCornersMask_           = ImDrawFlags_RoundCornersAll | ImDrawFlags_RoundCornersNone,
+
+    ImDrawFlags_Closed                      = 1 << 9, // PathStroke(), AddPolyline(): specify that shape should be closed.
     ImDrawFlags_InvalidMask_                = (ImDrawFlags)0x8000000F,
 };