Merge remote-tracking branch 'origin' into 2015-03-antialiased-primitives

README.md

@@ -1,6 +1,7 @@
 ImGui
 =====
 [![Build Status](https://travis-ci.org/ocornut/imgui.svg?branch=master)](https://travis-ci.org/ocornut/imgui)
+[![Coverity Status](https://scan.coverity.com/projects/4720/badge.svg)](https://scan.coverity.com/projects/4720)
 
 [![Patreon](https://cloud.githubusercontent.com/assets/8225057/5990484/70413560-a9ab-11e4-8942-1a63607c0b00.png)](http://www.patreon.com/imgui) [![PayPal](https://www.paypalobjects.com/en_US/i/btn/btn_donate_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=5Q73FPZ9C526U)
 

examples/README.txt

@@ -1,3 +1,9 @@
+Those are standalone ready-to-build applications to demonstrate ImGui.
+Unfortunately in 2015 it is still a massive pain to create and maintain portable build files.
+I choose to provide Visual Studio 10 .sln files and Makefile for Linux/OSX. 
+Please let me know if they don't work with your setup!
+You can probably just import the .cpp files into your own system and figure out the linkage from there.
+
 
 opengl_example/
     OpenGL example, using GLFW + fixed pipeline.

examples/directx11_example/main.cpp

@@ -149,6 +149,7 @@ int main(int, char**)
 
     // Setup ImGui binding
     ImGui_ImplDX11_Init(hwnd, g_pd3dDevice, g_pd3dDeviceContext);
+    //ImGuiIO& io = ImGui::GetIO();
     //ImFont* my_font0 = io.Fonts->AddFontDefault();
     //ImFont* my_font1 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
     //ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/Karla-Regular.ttf", 16.0f);
@@ -176,7 +177,7 @@ int main(int, char**)
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
-            static float f;
+            static float f = 0.0f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
             ImGui::ColorEdit3("clear color", (float*)&clear_col);

examples/directx9_example/imgui_impl_dx9.cpp

@@ -57,11 +57,12 @@ static void ImGui_ImplDX9_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_
         }
     }
     g_pVB->Unlock();
-
     g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) );
     g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
 
-    // Setup render state: alpha-blending, no face culling, no depth testing
+    // Setup render state: fixed-pipeline, alpha-blending, no face culling, no depth testing
+    g_pd3dDevice->SetPixelShader( NULL );
+    g_pd3dDevice->SetVertexShader( NULL );
     g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
     g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
     g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, false );

examples/directx9_example/main.cpp

@@ -73,6 +73,7 @@ int main(int, char**)
 
     // Setup ImGui binding
     ImGui_ImplDX9_Init(hwnd, g_pd3dDevice);
+    //ImGuiIO& io = ImGui::GetIO();
     //ImFont* my_font0 = io.Fonts->AddFontDefault();
     //ImFont* my_font1 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
     //ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/Karla-Regular.ttf", 16.0f);
@@ -103,7 +104,7 @@ int main(int, char**)
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
-            static float f;
+            static float f = 0.0f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
             ImGui::ColorEdit3("clear color", (float*)&clear_col);

examples/opengl3_example/main.cpp

@@ -48,7 +48,7 @@ int main(int, char**)
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
-            static float f;
+            static float f = 0.0f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
             ImGui::ColorEdit3("clear color", (float*)&clear_color);

examples/opengl_example/imgui_impl_glfw.cpp

@@ -87,6 +87,7 @@ static void ImGui_ImplGlfw_RenderDrawLists(ImDrawList** const cmd_lists, int cmd
     glDisableClientState(GL_COLOR_ARRAY);
     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
     glDisableClientState(GL_VERTEX_ARRAY);
+    glBindTexture(GL_TEXTURE_2D, 0);
     glMatrixMode(GL_MODELVIEW);
     glPopMatrix();
     glMatrixMode(GL_PROJECTION);

examples/opengl_example/main.cpp

@@ -42,7 +42,7 @@ int main(int, char**)
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
-            static float f;
+            static float f = 0.0f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
             ImGui::ColorEdit3("clear color", (float*)&clear_color);

extra_fonts/README.txt

@@ -1,8 +1,9 @@
 
  The code in imgui.cpp embeds a copy of 'ProggyClean.ttf' that you can use without any external files.
+ Those are only provided as a convenience, you can load your own .TTF files.
 
 ---------------------------------
- EXTRA FONTS FOR IMGUI
+ INCLUDED FONTS
 ---------------------------------
 
  DroidSans.ttf

imconfig.h

@@ -31,7 +31,7 @@
 //---- Include imgui_user.h at the end of imgui.h
 //#define IMGUI_INCLUDE_IMGUI_USER_H
 
-//---- Define implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
+//---- Define constructor and implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
 /*
 #define IM_VEC2_CLASS_EXTRA                                                 \
         ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \

imgui.h

@@ -53,10 +53,10 @@ typedef int (*ImGuiTextEditCallback)(ImGuiTextEditCallbackData *data);
 struct ImVec2
 {
     float x, y;
-    ImVec2() {}
+    ImVec2() { x = y = 0.0f; }
     ImVec2(float _x, float _y) { x = _x; y = _y; }
 
-#ifdef IM_VEC2_CLASS_EXTRA
+#ifdef IM_VEC2_CLASS_EXTRA          // Define constructor and implicit cast operators to convert back<>forth from your math types and ImVec2.
     IM_VEC2_CLASS_EXTRA
 #endif
 };
@@ -64,10 +64,10 @@ struct ImVec2
 struct ImVec4
 {
     float x, y, z, w;
-    ImVec4() {}
+    ImVec4() { x = y = z = w = 0.0f; }
     ImVec4(float _x, float _y, float _z, float _w) { x = _x; y = _y; z = _z; w = _w; }
 
-#ifdef IM_VEC4_CLASS_EXTRA
+#ifdef IM_VEC4_CLASS_EXTRA          // Define constructor and implicit cast operators to convert back<>forth from your math types and ImVec4.
     IM_VEC4_CLASS_EXTRA
 #endif
 };
@@ -147,7 +147,7 @@ public:
 // - struct ImFont                      // TTF font loader, bake glyphs into bitmap
 
 // ImGui end-user API
-// In a namespace so that user can add extra functions (e.g. Value() helpers for your vector or common types)
+// In a namespace so that user can add extra functions in a separate file (e.g. Value() helpers for your vector or common types)
 namespace ImGui
 {
     // Main
@@ -156,9 +156,10 @@ namespace ImGui
     IMGUI_API void          NewFrame();
     IMGUI_API void          Render();
     IMGUI_API void          Shutdown();
-    IMGUI_API void          ShowUserGuide();
+    IMGUI_API void          ShowUserGuide();                            // help block
-    IMGUI_API void          ShowStyleEditor(ImGuiStyle* ref = NULL);
+    IMGUI_API void          ShowStyleEditor(ImGuiStyle* ref = NULL);    // style editor block
-    IMGUI_API void          ShowTestWindow(bool* open = NULL);
+    IMGUI_API void          ShowTestWindow(bool* opened = NULL);        // test window, demonstrate ImGui features
+    IMGUI_API void          ShowMetricsWindow(bool* opened = NULL);     // metrics window
 
     // Window
     // See implementation in .cpp for details
@@ -191,7 +192,7 @@ namespace ImGui
     IMGUI_API void          SetWindowPos(const char* name, const ImVec2& pos, ImGuiSetCond cond = 0);      // set named window position - call within Begin()/End(). may incur tearing
     IMGUI_API void          SetWindowSize(const char* name, const ImVec2& size, ImGuiSetCond cond = 0);    // set named window size. set to ImVec2(0,0) to force an auto-fit. may incur tearing
     IMGUI_API void          SetWindowCollapsed(const char* name, bool collapsed, ImGuiSetCond cond = 0);   // set named window collapsed state
-    IMGUI_API void          SetWindowFocus(const char* name);                                              // set named window to be focused / front-most
+    IMGUI_API void          SetWindowFocus(const char* name);                                              // set named window to be focused / front-most. use NULL to remove focus.
 
     IMGUI_API float         GetScrollPosY();                                                    // get scrolling position [0..GetScrollMaxY()]
     IMGUI_API float         GetScrollMaxY();                                                    // get maximum scrolling position == ContentSize.Y - WindowSize.Y
@@ -284,25 +285,41 @@ namespace ImGui
     IMGUI_API void          Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0), const ImVec2& uv1 = ImVec2(1,1), const ImVec4& tint_col = ImVec4(1,1,1,1), const ImVec4& border_col = ImVec4(0,0,0,0));
     IMGUI_API bool          ImageButton(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0),  const ImVec2& uv1 = ImVec2(1,1), int frame_padding = -1, const ImVec4& bg_col = ImVec4(0,0,0,1), const ImVec4& tint_col = ImVec4(1,1,1,1));    // <0 frame_padding uses default frame padding settings. 0 for no padding
     IMGUI_API bool          CollapsingHeader(const char* label, const char* str_id = NULL, bool display_frame = true, bool default_open = false);
+    IMGUI_API bool          Checkbox(const char* label, bool* v);
+    IMGUI_API bool          CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
+    IMGUI_API bool          RadioButton(const char* label, bool active);
+    IMGUI_API bool          RadioButton(const char* label, int* v, int v_button);
+    IMGUI_API bool          Combo(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1);
+    IMGUI_API bool          Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int height_in_items = -1);      // separate items with \0, end item-list with \0\0
+    IMGUI_API bool          Combo(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
+    IMGUI_API bool          ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
+    IMGUI_API bool          ColorEdit3(const char* label, float col[3]);
+    IMGUI_API bool          ColorEdit4(const char* label, float col[4], bool show_alpha = true);
+    IMGUI_API void          ColorEditMode(ImGuiColorEditMode mode);
+    IMGUI_API void          PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
+    IMGUI_API void          PlotLines(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
+    IMGUI_API void          PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
+    IMGUI_API void          PlotHistogram(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
+
+    // Widgets: Sliders (tip: ctrl+click on a slider to input text)
     IMGUI_API bool          SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);     // adjust display_format to decorate the value with a prefix or a suffix. Use power!=1.0 for logarithmic sliders
     IMGUI_API bool          SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
     IMGUI_API bool          SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
     IMGUI_API bool          SliderFloat4(const char* label, float v[4], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
-    IMGUI_API bool          SliderAngle(const char* label, float* v, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f);     // *v in radians
+    IMGUI_API bool          SliderAngle(const char* label, float* v_rad, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f);
     IMGUI_API bool          SliderInt(const char* label, int* v, int v_min, int v_max, const char* display_format = "%.0f");
     IMGUI_API bool          SliderInt2(const char* label, int v[2], int v_min, int v_max, const char* display_format = "%.0f");
     IMGUI_API bool          SliderInt3(const char* label, int v[3], int v_min, int v_max, const char* display_format = "%.0f");
     IMGUI_API bool          SliderInt4(const char* label, int v[4], int v_min, int v_max, const char* display_format = "%.0f");
     IMGUI_API bool          VSliderFloat(const char* label, const ImVec2& size, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
     IMGUI_API bool          VSliderInt(const char* label, const ImVec2& size, int* v, int v_min, int v_max, const char* display_format = "%.0f");
-    IMGUI_API void          PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
+
-    IMGUI_API void          PlotLines(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
+    // Widgets: Drags (tip: ctrl+click on a drag box to input text)
-    IMGUI_API void          PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
+    // ImGui 1.38+ work-in-progress, may change name or API.
-    IMGUI_API void          PlotHistogram(const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0));
+    IMGUI_API bool          DragFloat(const char* label, float* v, float v_step = 1.0f, float v_min = 0.0f, float v_max = 0.0f, const char* display_format = "%.3f");   // If v_max >= v_max we have no bound
-    IMGUI_API bool          Checkbox(const char* label, bool* v);
+    IMGUI_API bool          DragInt(const char* label, int* v, int v_step = 1, int v_min = 0.0f, int v_max = 0.0f, const char* display_format = "%.0f");                // If v_max >= v_max we have no bound
-    IMGUI_API bool          CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
+
-    IMGUI_API bool          RadioButton(const char* label, bool active);
+    // Widgets: Input
-    IMGUI_API bool          RadioButton(const char* label, int* v, int v_button);
     IMGUI_API bool          InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiTextEditCallback callback = NULL, void* user_data = NULL);
     IMGUI_API bool          InputFloat(const char* label, float* v, float step = 0.0f, float step_fast = 0.0f, int decimal_precision = -1, ImGuiInputTextFlags extra_flags = 0);
     IMGUI_API bool          InputFloat2(const char* label, float v[2], int decimal_precision = -1);
@@ -312,15 +329,8 @@ namespace ImGui
     IMGUI_API bool          InputInt2(const char* label, int v[2]);
     IMGUI_API bool          InputInt3(const char* label, int v[3]);
     IMGUI_API bool          InputInt4(const char* label, int v[4]);
-    IMGUI_API bool          Combo(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1);
-    IMGUI_API bool          Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int height_in_items = -1);      // separate items with \0, end item-list with \0\0
-    IMGUI_API bool          Combo(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
-    IMGUI_API bool          ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
-    IMGUI_API bool          ColorEdit3(const char* label, float col[3]);
-    IMGUI_API bool          ColorEdit4(const char* label, float col[4], bool show_alpha = true);
-    IMGUI_API void          ColorEditMode(ImGuiColorEditMode mode);
 
-    // Trees
+    // Widgets: Trees
     IMGUI_API bool          TreeNode(const char* str_label_id);                                 // if returning 'true' the node is open and the user is responsible for calling TreePop
     IMGUI_API bool          TreeNode(const char* str_id, const char* fmt, ...);                 // "
     IMGUI_API bool          TreeNode(const void* ptr_id, const char* fmt, ...);                 // "
@@ -331,7 +341,7 @@ namespace ImGui
     IMGUI_API void          TreePop();
     IMGUI_API void          SetNextTreeNodeOpened(bool opened, ImGuiSetCond cond = 0);          // set next tree node to be opened.
 
-    // Selectable / Lists
+    // Widgets: Selectable / Lists
     IMGUI_API bool          Selectable(const char* label, bool selected = false, const ImVec2& size = ImVec2(0,0));
     IMGUI_API bool          Selectable(const char* label, bool* p_selected, const ImVec2& size = ImVec2(0,0));
     IMGUI_API bool          ListBox(const char* label, int* current_item, const char** items, int items_count, int height_in_items = -1);
@@ -340,7 +350,7 @@ namespace ImGui
     IMGUI_API bool          ListBoxHeader(const char* label, int items_count, int height_in_items = -1); // "
     IMGUI_API void          ListBoxFooter();                                                    // terminate the scrolling region
 
-    // Value() Helpers: output single value in "name: value" format. Tip: freely declare your own within the ImGui namespace!
+    // Widgets: Value() Helpers. Output single value in "name: value" format (tip: freely declare your own within the ImGui namespace!)
     IMGUI_API void          Value(const char* prefix, bool b);
     IMGUI_API void          Value(const char* prefix, int v);
     IMGUI_API void          Value(const char* prefix, unsigned int v);
@@ -348,7 +358,7 @@ namespace ImGui
     IMGUI_API void          Color(const char* prefix, const ImVec4& v);
     IMGUI_API void          Color(const char* prefix, unsigned int v);
 
-    // Logging: All text output from your interface are redirected to tty/file/clipboard. Tree nodes are automatically opened.
+    // Logging: all text output from interface is redirected to tty/file/clipboard. Tree nodes are automatically opened.
     IMGUI_API void          LogToTTY(int max_depth = -1);                                       // start logging to tty
     IMGUI_API void          LogToFile(int max_depth = -1, const char* filename = NULL);         // start logging to file
     IMGUI_API void          LogToClipboard(int max_depth = -1);                                 // start logging to OS clipboard
@@ -480,6 +490,8 @@ enum ImGuiCol_
     ImGuiCol_Border,
     ImGuiCol_BorderShadow,
     ImGuiCol_FrameBg,               // Background of checkbox, radio button, plot, slider, text input
+    ImGuiCol_FrameBgHovered,
+    ImGuiCol_FrameBgActive,
     ImGuiCol_TitleBg,
     ImGuiCol_TitleBgCollapsed,
     ImGuiCol_ScrollbarBg,
@@ -487,8 +499,6 @@ enum ImGuiCol_
     ImGuiCol_ScrollbarGrabHovered,
     ImGuiCol_ScrollbarGrabActive,
     ImGuiCol_ComboBg,
-    ImGuiCol_CheckHovered,
-    ImGuiCol_CheckActive,
     ImGuiCol_CheckMark,
     ImGuiCol_SliderGrab,
     ImGuiCol_SliderGrabActive,
@@ -546,12 +556,12 @@ enum ImGuiColorEditMode_
 enum ImGuiMouseCursor_
 {
     ImGuiMouseCursor_Arrow = 0,
-    ImGuiMouseCursor_TextInput,
+    ImGuiMouseCursor_TextInput,         // When hovering over InputText, etc.
-    ImGuiMouseCursor_Move,                  // Unused by ImGui
+    ImGuiMouseCursor_Move,              // Unused
-    ImGuiMouseCursor_ResizeNS,              // Unused by ImGui
+    ImGuiMouseCursor_ResizeNS,          // Unused
-    ImGuiMouseCursor_ResizeEW,              // Unused by ImGui
+    ImGuiMouseCursor_ResizeEW,          // When hovering over a column
-    ImGuiMouseCursor_ResizeNESW,            // Unused by ImGui
+    ImGuiMouseCursor_ResizeNESW,        // Unused
-    ImGuiMouseCursor_ResizeNWSE,
+    ImGuiMouseCursor_ResizeNWSE,        // When hovering over the bottom-right corner of a window
     ImGuiMouseCursor_Count_
 };
 
@@ -660,6 +670,7 @@ struct ImGuiIO
     bool        WantCaptureMouse;           // Mouse is hovering a window or widget is active (= ImGui will use your mouse input)
     bool        WantCaptureKeyboard;        // Widget is active (= ImGui will use your keyboard input)
     float       Framerate;                  // Framerate estimation, in frame per second. Rolling average estimation based on IO.DeltaTime over 120 frames
+    int         MetricsVertices;            // Vertices processed during last call to Render()
 
     //------------------------------------------------------------------
     // [Internal] ImGui will maintain those fields for you
@@ -873,6 +884,7 @@ IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT;
 // At the moment, each ImGui window contains its own ImDrawList but they could potentially be merged in the future.
 // If you want to add custom rendering within a window, you can use ImGui::GetWindowDrawList() to access the current draw list and add your own primitives.
 // You can interleave normal ImGui:: calls and adding primitives to the current draw list.
+// All positions are in screen coordinates (0,0=top-left, 1 pixel per unit). Primitives are always added to the list and not culled (culling is done at render time and at a higher-level by ImGui:: functions).
 // Note that this only gives you access to rendering polygons. If your intent is to create custom widgets and the publicly exposed functions/data aren't sufficient, you can add code in imgui_user.inl
 struct ImDrawList
 {
@@ -1008,7 +1020,7 @@ struct ImFont
 
     // Methods
     IMGUI_API ImFont();
-    IMGUI_API ~ImFont() { Clear(); }
+    IMGUI_API ~ImFont();
     IMGUI_API void                  Clear();
     IMGUI_API void                  BuildLookupTable();
     IMGUI_API const Glyph*          FindGlyph(unsigned short c) const;