Shutdown: Unlock font atlas before destroying context, so we can destroy a context between NewFrame and EndFrame if we wait (facilitate main loop structures). Internals: GetWindowScrollMaxX(), GetWindowScrollMaxY()

imgui.cpp

@@ -3290,7 +3290,10 @@ void ImGui::Shutdown(ImGuiContext* context)
     // The fonts atlas can be used prior to calling NewFrame(), so we clear it even if g.Initialized is FALSE (which would happen if we never called NewFrame)
     ImGuiContext& g = *context;
     if (g.IO.Fonts && g.FontAtlasOwnedByContext)
+    {
+        g.IO.Fonts->Locked = false;
         IM_DELETE(g.IO.Fonts);
+    }
     g.IO.Fonts = NULL;
 
     // Cleanup of other data are conditional on actually having initialized ImGui.
@@ -4309,12 +4312,12 @@ ImVec2 ImGui::CalcWindowExpectedSize(ImGuiWindow* window)
     return CalcSizeAfterConstraint(window, CalcSizeAutoFit(window, size_contents));
 }
 
-static float GetScrollMaxX(ImGuiWindow* window)
+float ImGui::GetWindowScrollMaxX(ImGuiWindow* window)
 {
     return ImMax(0.0f, window->SizeContents.x - (window->SizeFull.x - window->ScrollbarSizes.x));
 }
 
-static float GetScrollMaxY(ImGuiWindow* window)
+float ImGui::GetWindowScrollMaxY(ImGuiWindow* window)
 {
     return ImMax(0.0f, window->SizeContents.y - (window->SizeFull.y - window->ScrollbarSizes.y));
 }
@@ -4342,8 +4345,8 @@ static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window, bool s
     scroll = ImMax(scroll, ImVec2(0.0f, 0.0f));
     if (!window->Collapsed && !window->SkipItems)
     {
-        scroll.x = ImMin(scroll.x, GetScrollMaxX(window));
-        scroll.y = ImMin(scroll.y, GetScrollMaxY(window));
+        scroll.x = ImMin(scroll.x, ImGui::GetWindowScrollMaxX(window));
+        scroll.y = ImMin(scroll.y, ImGui::GetWindowScrollMaxY(window));
     }
     return scroll;
 }
@@ -6009,12 +6012,12 @@ float ImGui::GetScrollY()
 
 float ImGui::GetScrollMaxX()
 {
-    return GetScrollMaxX(GImGui->CurrentWindow);
+    return GetWindowScrollMaxX(GImGui->CurrentWindow);
 }
 
 float ImGui::GetScrollMaxY()
 {
-    return GetScrollMaxY(GImGui->CurrentWindow);
+    return GetWindowScrollMaxY(GImGui->CurrentWindow);
 }
 
 void ImGui::SetScrollX(float scroll_x)
@@ -8918,7 +8921,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
                 (flags & ImGuiWindowFlags_ChildWindow) ? "Child " : "", (flags & ImGuiWindowFlags_Tooltip)   ? "Tooltip "   : "", (flags & ImGuiWindowFlags_Popup) ? "Popup " : "",
                 (flags & ImGuiWindowFlags_Modal)       ? "Modal " : "", (flags & ImGuiWindowFlags_ChildMenu) ? "ChildMenu " : "", (flags & ImGuiWindowFlags_NoSavedSettings) ? "NoSavedSettings " : "",
                 (flags & ImGuiWindowFlags_NoInputs)    ? "NoInputs":"", (flags & ImGuiWindowFlags_AlwaysAutoResize) ? "AlwaysAutoResize" : "");
-            ImGui::BulletText("Scroll: (%.2f/%.2f,%.2f/%.2f)", window->Scroll.x, GetScrollMaxX(window), window->Scroll.y, GetScrollMaxY(window));
+            ImGui::BulletText("Scroll: (%.2f/%.2f,%.2f/%.2f)", window->Scroll.x, GetWindowScrollMaxX(window), window->Scroll.y, GetWindowScrollMaxY(window));
             ImGui::BulletText("Active: %d/%d, WriteAccessed: %d, BeginOrderWithinContext: %d", window->Active, window->WasActive, window->WriteAccessed, (window->Active || window->WasActive) ? window->BeginOrderWithinContext : -1);
             ImGui::BulletText("Appearing: %d, Hidden: %d (Reg %d Resize %d), SkipItems: %d", window->Appearing, window->Hidden, window->HiddenFramesRegular, window->HiddenFramesForResize, window->SkipItems);
             ImGui::BulletText("NavLastIds: 0x%08X,0x%08X, NavLayerActiveMask: %X", window->NavLastIds[0], window->NavLastIds[1], window->DC.NavLayerActiveMask);

imgui_internal.h

@@ -1125,6 +1125,8 @@ namespace ImGui
     IMGUI_API bool          IsWindowNavFocusable(ImGuiWindow* window);
     IMGUI_API void          SetWindowScrollX(ImGuiWindow* window, float new_scroll_x);
     IMGUI_API void          SetWindowScrollY(ImGuiWindow* window, float new_scroll_y);
+    IMGUI_API float         GetWindowScrollMaxX(ImGuiWindow* window);
+    IMGUI_API float         GetWindowScrollMaxY(ImGuiWindow* window);
     IMGUI_API ImRect        GetWindowAllowedExtentRect(ImGuiWindow* window);
     IMGUI_API void          SetCurrentFont(ImFont* font);
     inline ImFont*          GetDefaultFont() { ImGuiContext& g = *GImGui; return g.IO.FontDefault ? g.IO.FontDefault : g.IO.Fonts->Fonts[0]; }