Version number

Fixed Clang warnings

README.md

@@ -3,7 +3,7 @@ ImGui
 
 ImGui is a bloat-free graphical user interface library for C++. It outputs vertex buffers that you can render in your 3D-pipeline enabled application. It is portable, renderer agnostic and carries minimal amount of dependencies (only 3 files are needed). It is based on an "immediate" graphical user interface paradigm which allows you to build user interfaces with ease.
 
-ImGui is designed to enable fast iteration and allow programmers to create "content creation" or "debug" tools (as opposed to UI for the average end-user). It favors simplicity and productivity toward this goal, and thus lacks certain features normally found in more high-level libraries
+ImGui is designed to enable fast iteration and allow programmers to create "content creation" or "debug" tools (as opposed to UI for the average end-user). It favors simplicity and productivity toward this goal, and thus lacks certain features normally found in more high-level libraries.
 
 ImGui is particularly suited to integration in 3D applications, fullscreen applications, embedded applications, games, or any applications on consoles platforms where operating system features are non-standard. 
 
@@ -38,6 +38,7 @@ The Immediate Mode GUI paradigm may at first appear unusual to some users. This
 
 Frequently Asked Question
 -------------------------
+
 <b>How do you use ImGui on a platform that may not have a mouse and keyboard?</b>
 
 I recommend using [Synergy](http://synergy-project.org). With the uSynergy.c micro client running you can seamlessly use your PC input devices from a video game console or a tablet. ImGui was also designed to function with touch inputs if you increase the padding of widgets to compensate for the lack of precision of touch devices, but it is recommended you use a mouse to allow optimising for screen real-estate.
@@ -51,16 +52,33 @@ I recommend using [Synergy](http://synergy-project.org). With the uSynergy.c mic
 
 Yes. I have written data browsers, debuggers, profilers and all sort of non-trivial tools with the library. There's no reason you cannot, and in my experience the simplicity of the API is very empowering. However note that ImGui is programmer centric and the immediate-mode GUI paradigm might requires a bit of adaptation before you can realize its full potential. 
 
+<b>Is ImGui fast?</b>
+
+Down the fundation of its visual design, ImGui is engineered to be fairly performant both in term of CPU and GPU usage. Running elaborate code and creating elaborate UI will of course have a cost but ImGui aims to minimize it.
+
+Mileage may vary but the following screenshot should give you an idea of the cost of running and rendering UI code (In the case of a trivial demo application like this one, your driver/os setup may be a bottleneck and cause higher variation or throttled framerate. Testing performance as part of a real application is recommended).
+
+![performance screenshot](/web/performance_01_close_up.png?raw=true)
+
+This is showing framerate on my 2011 iMac running Windows 7, OpenGL, AMD Radeon HD 6700M. ([click here for the full-size picture](/web/performance_01.png)).
+In contrast, librairies featuring higher-quality rendering and layouting techniques may have a higher resources footprint.
+
 <b>Can you reskin the look of ImGui?</b>
 
-Yes, you can alter the look of the interface to some degree: changing colors, sizes and padding, font. However, as ImGui is designed and optimised to create debug tools, the amount of skinning you can apply is limited. There is only so much you can stray away from the default look and feel of the interface. The example below uses modified settings to create a more compact UI with different colors:
+Yes, you can alter the look of the interface to some degree: changing colors, sizes and padding, font. However, as ImGui is designed and optimised to create debug tools, the amount of skinning you can apply is limited. There is only so much you can stray away from the default look and feel of the interface. The example below uses modified settings to create a very compact UI with different colors:
 
 ![skinning screenshot 1](/web/skinning_sample_01.png?raw=true)
 
+Support
+-------
+
 <b>Can you develop features xxxx for ImGui?</b>
 
-Please use GitHub 'Issues' facilities to suggest and discuss improvements. If you are company and would like specific non-trivial features to be implemented, I am available for hire to work on or with ImGui. Donations are also welcome to support further work on the library. 
+Please use GitHub 'Issues' facilities to suggest and discuss improvements. Your question are often helpul to the community of users. If you represent an organization and would like specific non-trivial features to be implemented, I am available for hire to work on or with ImGui. 
 
+<b>Can I donate to support the development of ImGui?</b>
+
+If you have the mean to help, I have setup a [**Patreon page**](http://www.patreon.com/imgui) to enable me to spend more time on the development of the library. One-off donations are also greatly appreciated. Thanks!
 
 Credits
 -------

examples/directx9_example/main.cpp

@@ -92,9 +92,9 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
     {
         // Render command list
         const ImDrawList* cmd_list = cmd_lists[n];
-        const ImDrawCmd* pcmd_end = cmd_list->commands.end();
-        for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++)
-        {
+		for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
+		{
+			const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
             const RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
             g_pd3dDevice->SetScissorRect(&r);
             g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);

examples/opengl_example/main.cpp

@@ -34,6 +34,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
     // We are using the OpenGL fixed pipeline to make the example code simpler to read!
     // A probable faster way to render would be to collate all vertices from all cmd_lists into a single vertex buffer.
     // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
+    glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
     glEnable(GL_BLEND);
     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
     glDisable(GL_CULL_FACE);
@@ -51,33 +52,41 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
     const float width = ImGui::GetIO().DisplaySize.x;
     const float height = ImGui::GetIO().DisplaySize.y;
     glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
     glLoadIdentity();
     glOrtho(0.0f, width, height, 0.0f, -1.0f, +1.0f);
     glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
     glLoadIdentity();
 
     // Render command lists
     for (int n = 0; n < cmd_lists_count; n++)
     {
         const ImDrawList* cmd_list = cmd_lists[n];
-        const unsigned char* vtx_buffer = (const unsigned char*)cmd_list->vtx_buffer.begin();
-        glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer));
-        glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer+8));
-        glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer+16));
+        const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->vtx_buffer.front();
+        glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + offsetof(ImDrawVert, pos)));
+        glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + offsetof(ImDrawVert, uv)));
+        glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + offsetof(ImDrawVert, col)));
 
         int vtx_offset = 0;
-        const ImDrawCmd* pcmd_end = cmd_list->commands.end();
-        for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++)
+		for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
         {
+			const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
             glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
             glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
             vtx_offset += pcmd->vtx_count;
         }
     }
-    glDisable(GL_SCISSOR_TEST);
     glDisableClientState(GL_COLOR_ARRAY);
     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
     glDisableClientState(GL_VERTEX_ARRAY);
+
+    // Restore modified state
+    glMatrixMode(GL_MODELVIEW);
+    glPopMatrix();
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+    glPopAttrib();
 }
 
 // NB: ImGui already provide OS clipboard support for Windows so this isn't needed if you are using Windows only.

imconfig.h

@@ -39,6 +39,6 @@ namespace ImGui
 {
     void    Value(const char* prefix, const MyVec2& v, const char* float_format = NULL);
     void    Value(const char* prefix, const MyVec4& v, const char* float_format = NULL);
-};
+}
 */
 

imgui.h

@@ -1,4 +1,4 @@
-// ImGui library v1.14
+// ImGui library v1.16
 // See .cpp file for commentary.
 // See ImGui::ShowTestWindow() for sample code.
 // Read 'Programmer guide' in .cpp for notes on how to setup ImGui in your codebase.
@@ -25,10 +25,15 @@ struct ImGuiWindow;
 #define IM_ASSERT(_EXPR)    assert(_EXPR)
 #endif
 
+#ifndef IMGUI_API
+#define IMGUI_API
+#endif
+
 typedef unsigned int ImU32;
 typedef unsigned short ImWchar;
 typedef ImU32 ImGuiID;
 typedef int ImGuiCol;               // enum ImGuiCol_
+typedef int ImGuiStyleVar;          // enum ImGuiStyleVar_
 typedef int ImGuiKey;               // enum ImGuiKey_
 typedef int ImGuiColorEditMode;     // enum ImGuiColorEditMode_
 typedef int ImGuiWindowFlags;       // enum ImGuiWindowFlags_
@@ -60,10 +65,10 @@ struct ImVec4
 namespace ImGui
 {
     // Proxy functions to access the MemAllocFn/MemFreeFn/MemReallocFn pointers in ImGui::GetIO(). The only reason they exist here is to allow ImVector<> to compile inline.
-    void*       MemAlloc(size_t sz);
-    void        MemFree(void* ptr);
-    void*       MemRealloc(void* ptr, size_t sz);
-};
+    IMGUI_API void*       MemAlloc(size_t sz);
+    IMGUI_API void        MemFree(void* ptr);
+    IMGUI_API void*       MemRealloc(void* ptr, size_t sz);
+}
 
 // std::vector<> like class to avoid dragging dependencies (also: windows implementation of STL with debug enabled is absurdly slow, so let's bypass it so our code runs fast in debug). 
 // Use '#define ImVector std::vector' if you want to use the STL type or your own type.
@@ -111,8 +116,8 @@ public:
     inline void                 push_back(const value_type& v)  { if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); Data[Size++] = v; }
     inline void                 pop_back()                      { IM_ASSERT(Size > 0); Size--; }
 
-    inline iterator             erase(const_iterator it)        { IM_ASSERT(it >= begin() && it < end()); const ptrdiff_t off = it - begin(); memmove(Data + off, Data + off + 1, (Size - off - 1) * sizeof(value_type)); Size--; return Data + off; }
-    inline void                 insert(const_iterator it, const value_type& v)  { IM_ASSERT(it >= begin() && it <= end()); const ptrdiff_t off = it - begin(); if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); if (off < (int)Size) memmove(Data + off + 1, Data + off, (Size - off) * sizeof(value_type)); Data[off] = v; Size++; }
+    inline iterator             erase(const_iterator it)        { IM_ASSERT(it >= begin() && it < end()); const ptrdiff_t off = it - begin(); memmove(Data + off, Data + off + 1, (Size - (size_t)off - 1) * sizeof(value_type)); Size--; return Data + off; }
+    inline void                 insert(const_iterator it, const value_type& v)  { IM_ASSERT(it >= begin() && it <= end()); const ptrdiff_t off = it - begin(); if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); if (off < (int)Size) memmove(Data + off + 1, Data + off, (Size - (size_t)off) * sizeof(value_type)); Data[off] = v; Size++; }
 };
 #endif // #ifndef ImVector
 
@@ -129,157 +134,170 @@ public:
 namespace ImGui
 {
     // Main
-    ImGuiIO&    GetIO();
-    ImGuiStyle& GetStyle();
-    void        NewFrame();
-    void        Render();
-    void        Shutdown();
-    void        ShowUserGuide();
-    void        ShowStyleEditor(ImGuiStyle* ref = NULL);
-    void        ShowTestWindow(bool* open = NULL);
+    IMGUI_API ImGuiIO&      GetIO();
+    IMGUI_API ImGuiStyle&   GetStyle();
+    IMGUI_API void          NewFrame();
+    IMGUI_API void          Render();
+    IMGUI_API void          Shutdown();
+    IMGUI_API void          ShowUserGuide();
+    IMGUI_API void          ShowStyleEditor(ImGuiStyle* ref = NULL);
+    IMGUI_API void          ShowTestWindow(bool* open = NULL);
 
     // Window
-    bool        Begin(const char* name = "Debug", bool* open = NULL, ImVec2 size = ImVec2(0,0), float fill_alpha = -1.0f, ImGuiWindowFlags flags = 0);    // return false when window is collapsed, so you can early out in your code.
-    void        End();
-    void        BeginChild(const char* str_id, ImVec2 size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0);
-    void        EndChild();
-    bool        GetWindowIsFocused();
-    ImVec2      GetWindowSize();
-    float       GetWindowWidth();
-    ImVec2      GetWindowPos();                                                     // you should rarely need/care about the window position, but it can be useful if you want to use your own drawing.
-    void        SetWindowPos(const ImVec2& pos);                                    // set current window pos.
-    ImVec2      GetWindowContentRegionMin();
-    ImVec2      GetWindowContentRegionMax();
-    ImDrawList* GetWindowDrawList();                                                // get rendering command-list if you want to append your own draw primitives.
-	ImFont      GetWindowFont();
-	float       GetWindowFontSize();
-    void        SetWindowFontScale(float scale);                                    // per-window font scale. Adjust IO.FontBaseScale if you want to scale all windows together.
-    void        SetScrollPosHere();                                                 // adjust scrolling position to center into the current cursor position.
-    void        SetKeyboardFocusHere(int offset = 0);                               // focus keyboard on the next widget. Use 'offset' to access sub components of a multiple component widget.
-    void        SetTreeStateStorage(ImGuiStorage* tree);                            // replace tree state storage with our own (if you want to manipulate it yourself, typically clear subsection of it).
-    ImGuiStorage* GetTreeStateStorage();
-    void        PushItemWidth(float item_width);
-    void        PopItemWidth();
-    float       GetItemWidth();
-    void        PushAllowKeyboardFocus(bool v);                                     // allow focusing using TAB/Shift-TAB, enabled by default but you can disable it for certain widgets.
-    void        PopAllowKeyboardFocus();
-    void        PushStyleColor(ImGuiCol idx, const ImVec4& col);
-    void        PopStyleColor();
+    IMGUI_API bool          Begin(const char* name = "Debug", bool* open = NULL, ImVec2 size = ImVec2(0,0), float fill_alpha = -1.0f, ImGuiWindowFlags flags = 0);    // return false when window is collapsed, so you can early out in your code.
+    IMGUI_API void          End();
+    IMGUI_API void          BeginChild(const char* str_id, ImVec2 size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0);                         // size==0.0f: use remaining window size, size<0.0f: use remaining window size minus abs(size). on each axis.
+    IMGUI_API void          EndChild();
+    IMGUI_API bool          GetWindowIsFocused();
+    IMGUI_API ImVec2        GetWindowSize();
+    IMGUI_API float         GetWindowWidth();
+    IMGUI_API void          SetWindowSize(const ImVec2& size);                                  // set to ImVec2(0,0) to force an auto-fit
+    IMGUI_API ImVec2        GetWindowPos();                                                     // you should rarely need/care about the window position, but it can be useful if you want to use your own drawing.
+    IMGUI_API void          SetWindowPos(const ImVec2& pos);                                    // set current window pos.
+    IMGUI_API ImVec2        GetContentRegionMax();                                              // window or current column boundaries
+    IMGUI_API ImVec2        GetWindowContentRegionMin();                                        // window boundaries
+    IMGUI_API ImVec2        GetWindowContentRegionMax();
+    IMGUI_API ImDrawList*   GetWindowDrawList();                                                // get rendering command-list if you want to append your own draw primitives.
+    IMGUI_API ImFont        GetWindowFont();
+    IMGUI_API float         GetWindowFontSize();
+    IMGUI_API void          SetWindowFontScale(float scale);                                    // per-window font scale. Adjust IO.FontBaseScale if you want to scale all windows together.
+    IMGUI_API void          SetScrollPosHere();                                                 // adjust scrolling position to center into the current cursor position.
+    IMGUI_API void          SetKeyboardFocusHere(int offset = 0);                               // focus keyboard on the next widget. Use 'offset' to access sub components of a multiple component widget.
+    IMGUI_API void          SetTreeStateStorage(ImGuiStorage* tree);                            // replace tree state storage with our own (if you want to manipulate it yourself, typically clear subsection of it).
+    IMGUI_API ImGuiStorage* GetTreeStateStorage();
+    
+    IMGUI_API void          PushItemWidth(float item_width);                                    // width of items for the common item+label case. default to ~2/3 of windows width.
+    IMGUI_API void          PopItemWidth();
+    IMGUI_API float         GetItemWidth();
+    IMGUI_API void          PushAllowKeyboardFocus(bool v);                                     // allow focusing using TAB/Shift-TAB, enabled by default but you can disable it for certain widgets.
+    IMGUI_API void          PopAllowKeyboardFocus();
+    IMGUI_API void          PushStyleColor(ImGuiCol idx, const ImVec4& col);
+    IMGUI_API void          PopStyleColor(int count = 1);
+    IMGUI_API void          PushStyleVar(ImGuiStyleVar idx, float val);
+    IMGUI_API void          PushStyleVar(ImGuiStyleVar idx, const ImVec2& val);
+    IMGUI_API void          PopStyleVar(int count = 1);
+    IMGUI_API void          PushTextWrapPos(float wrap_pos_x = 0.0f);                           // word-wrapping for Text*() commands. < 0.0f: no wrapping; 0.0f: wrap to end of window (or column); > 0.0f: wrap at 'wrap_pos_x' position in window local space.
+    IMGUI_API void          PopTextWrapPos();
 
     // Tooltip
-    void        SetTooltip(const char* fmt, ...);                                   // set tooltip under mouse-cursor, typically use with ImGui::IsHovered(). last call wins.
-    void        SetTooltipV(const char* fmt, va_list args);
-    void        BeginTooltip();                                                     // use to create full-featured tooltip windows that aren't just text.
-    void        EndTooltip();
+    IMGUI_API void          SetTooltip(const char* fmt, ...);                                   // set tooltip under mouse-cursor, typically use with ImGui::IsHovered(). last call wins.
+    IMGUI_API void          SetTooltipV(const char* fmt, va_list args);
+    IMGUI_API void          BeginTooltip();                                                     // use to create full-featured tooltip windows that aren't just text.
+    IMGUI_API void          EndTooltip();
 
     // Layout
-    void        Separator();                                                        // horizontal line
-    void        SameLine(int column_x = 0, int spacing_w = -1);                     // call between widgets to layout them horizontally
-    void        Spacing();
-    void        Columns(int count = 1, const char* id = NULL, bool border=true);    // setup number of columns
-    void        NextColumn();                                                       // next column
-    float       GetColumnOffset(int column_index = -1);
-    void        SetColumnOffset(int column_index, float offset);
-    float       GetColumnWidth(int column_index = -1);
-    ImVec2      GetCursorPos();                                                     // cursor position is relative to window position
-    void        SetCursorPos(const ImVec2& pos);                                    // "
-    void        SetCursorPosX(float x);                                             // "
-    void        SetCursorPosY(float y);                                             // "
-    ImVec2      GetCursorScreenPos();                                               // cursor position in screen space
-    void        AlignFirstTextHeightToWidgets();                                    // call once if the first item on the line is a Text() item and you want to vertically lower it to match subsequent (bigger) widgets.
-    float       GetTextLineSpacing();
-    float       GetTextLineHeight();
+    IMGUI_API void          Separator();                                                        // horizontal line
+    IMGUI_API void          SameLine(int column_x = 0, int spacing_w = -1);                     // call between widgets to layout them horizontally
+    IMGUI_API void          Spacing();
+    IMGUI_API void          Columns(int count = 1, const char* id = NULL, bool border=true);    // setup number of columns
+    IMGUI_API void          NextColumn();                                                       // next column
+    IMGUI_API float         GetColumnOffset(int column_index = -1);
+    IMGUI_API void          SetColumnOffset(int column_index, float offset);
+    IMGUI_API float         GetColumnWidth(int column_index = -1);
+    IMGUI_API ImVec2        GetCursorPos();                                                     // cursor position is relative to window position
+    IMGUI_API void          SetCursorPos(const ImVec2& pos);                                    // "
+    IMGUI_API void          SetCursorPosX(float x);                                             // "
+    IMGUI_API void          SetCursorPosY(float y);                                             // "
+    IMGUI_API ImVec2        GetCursorScreenPos();                                               // cursor position in screen space
+    IMGUI_API void          AlignFirstTextHeightToWidgets();                                    // call once if the first item on the line is a Text() item and you want to vertically lower it to match subsequent (bigger) widgets.
+    IMGUI_API float         GetTextLineSpacing();
+    IMGUI_API float         GetTextLineHeight();
 
     // ID scopes
-    void        PushID(const char* str_id);
-    void        PushID(const void* ptr_id);
-    void        PushID(const int int_id);
-    void        PopID();
+    IMGUI_API void          PushID(const char* str_id);
+    IMGUI_API void          PushID(const void* ptr_id);
+    IMGUI_API void          PushID(const int int_id);
+    IMGUI_API void          PopID();
 
     // Widgets
-    void        Text(const char* fmt, ...);
-    void        TextV(const char* fmt, va_list args);
-    void        TextColored(const ImVec4& col, const char* fmt, ...);               // shortcut to doing PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();
-    void        TextColoredV(const ImVec4& col, const char* fmt, va_list args);
-    void        TextUnformatted(const char* text, const char* text_end = NULL);     // doesn't require null terminated string if 'text_end' is specified. no copy done to any bounded stack buffer, better for long chunks of text.
-    void        LabelText(const char* label, const char* fmt, ...);
-    void        LabelTextV(const char* label, const char* fmt, va_list args);
-    void        BulletText(const char* fmt, ...);
-    void        BulletTextV(const char* fmt, va_list args);
-    bool        Button(const char* label, ImVec2 size = ImVec2(0,0), bool repeat_when_held = false);
-    bool        SmallButton(const char* label);
-    bool        CollapsingHeader(const char* label, const char* str_id = NULL, const bool display_frame = true, const bool default_open = false);
-    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.
-    bool        SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
-    bool        SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
-    bool        SliderFloat4(const char* label, float v[4], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
-    bool        SliderAngle(const char* label, float* v, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f);     // *v in radians
-    bool        SliderInt(const char* label, int* v, int v_min, int v_max, const char* display_format = "%.0f");
-    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));
-    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));
-    bool        Checkbox(const char* label, bool* v);
-    bool        CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
-    bool        RadioButton(const char* label, bool active);
-    bool        RadioButton(const char* label, int* v, int v_button);
-    bool        InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0);
-    bool        InputFloat(const char* label, float* v, float step = 0.0f, float step_fast = 0.0f, int decimal_precision = -1, ImGuiInputTextFlags extra_flags = 0);
-    bool        InputFloat2(const char* label, float v[2], int decimal_precision = -1);
-    bool        InputFloat3(const char* label, float v[3], int decimal_precision = -1);
-    bool        InputFloat4(const char* label, float v[4], int decimal_precision = -1);
-    bool        InputInt(const char* label, int* v, int step = 1, int step_fast = 100, ImGuiInputTextFlags extra_flags = 0);
-    bool        Combo(const char* label, int* current_item, const char** items, int items_count, int popup_height_items = 7);
-    bool        Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int popup_height_items = 7);      // Separate items with \0, end item-list with \0\0
-    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 popup_height_items = 7);
-    bool        ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
-    bool        ColorEdit3(const char* label, float col[3]);
-    bool        ColorEdit4(const char* label, float col[4], bool show_alpha = true);
-    void        ColorEditMode(ImGuiColorEditMode mode);
-    bool        TreeNode(const char* str_label_id);                                 // if returning 'true' the node is open and the user is responsible for calling TreePop
-    bool        TreeNode(const char* str_id, const char* fmt, ...);                 // "
-    bool        TreeNode(const void* ptr_id, const char* fmt, ...);                 // "
-    bool        TreeNodeV(const char* str_id, const char* fmt, va_list args);       // "
-    bool        TreeNodeV(const void* ptr_id, const char* fmt, va_list args);       // "
-    void        TreePush(const char* str_id = NULL);                                // already called by TreeNode(), but you can call Push/Pop yourself for layouting purpose
-    void        TreePush(const void* ptr_id = NULL);                                // "
-    void        TreePop();
-    void        OpenNextNode(bool open);                                            // force open/close the next TreeNode or CollapsingHeader
+    IMGUI_API void          Text(const char* fmt, ...);
+    IMGUI_API void          TextV(const char* fmt, va_list args);
+    IMGUI_API void          TextColored(const ImVec4& col, const char* fmt, ...);               // shortcut for PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();
+    IMGUI_API void          TextColoredV(const ImVec4& col, const char* fmt, va_list args);
+    IMGUI_API void          TextWrapped(const char* fmt, ...);                                  // shortcut for PushTextWrapPos(0.0f); Text(fmt, ...); PopTextWrapPos();
+    IMGUI_API void          TextWrappedV(const char* fmt, va_list args);
+    IMGUI_API void          TextUnformatted(const char* text, const char* text_end = NULL);     // doesn't require null terminated string if 'text_end' is specified. no copy done to any bounded stack buffer, recommended for long chunks of text.
+    IMGUI_API void          LabelText(const char* label, const char* fmt, ...);                 // display text+label aligned the same way as value+label widgets 
+    IMGUI_API void          LabelTextV(const char* label, const char* fmt, va_list args);
+    IMGUI_API void          BulletText(const char* fmt, ...);
+    IMGUI_API void          BulletTextV(const char* fmt, va_list args);
+    IMGUI_API bool          Button(const char* label, ImVec2 size = ImVec2(0,0), bool repeat_when_held = false);
+    IMGUI_API bool          SmallButton(const char* label);
+    IMGUI_API bool          CollapsingHeader(const char* label, const char* str_id = NULL, const bool display_frame = true, const bool default_open = false);
+    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          SliderInt(const char* label, 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));
+    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));
+    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          InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0);
+    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);
+    IMGUI_API bool          InputFloat3(const char* label, float v[3], int decimal_precision = -1);
+    IMGUI_API bool          InputFloat4(const char* label, float v[4], int decimal_precision = -1);
+    IMGUI_API bool          InputInt(const char* label, int* v, int step = 1, int step_fast = 100, ImGuiInputTextFlags extra_flags = 0);
+    IMGUI_API bool          Combo(const char* label, int* current_item, const char** items, int items_count, int popup_height_items = 7);
+    IMGUI_API bool          Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int popup_height_items = 7);      // 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 popup_height_items = 7);
+    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 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, ...);                 // "
+    IMGUI_API bool          TreeNodeV(const char* str_id, const char* fmt, va_list args);       // "
+    IMGUI_API bool          TreeNodeV(const void* ptr_id, const char* fmt, va_list args);       // "
+    IMGUI_API void          TreePush(const char* str_id = NULL);                                // already called by TreeNode(), but you can call Push/Pop yourself for layouting purpose
+    IMGUI_API void          TreePush(const void* ptr_id = NULL);                                // "
+    IMGUI_API void          TreePop();
+    IMGUI_API void          OpenNextNode(bool open);                                            // force open/close the next TreeNode or CollapsingHeader
 
     // Value helper output "name: value"
     // Freely declare your own in the ImGui namespace.
-    void        Value(const char* prefix, bool b);
-    void        Value(const char* prefix, int v);
-    void        Value(const char* prefix, unsigned int v);
-    void        Value(const char* prefix, float v, const char* float_format = NULL);
-    void        Color(const char* prefix, const ImVec4& v);
-    void        Color(const char* prefix, unsigned int v);
+    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);
+    IMGUI_API void          Value(const char* prefix, float v, const char* float_format = NULL);
+    IMGUI_API void          Color(const char* prefix, const ImVec4& v);
+    IMGUI_API void          Color(const char* prefix, unsigned int v);
 
     // Logging
-    void        LogButtons();
-    void        LogToTTY(int max_depth = -1);
-    void        LogToFile(int max_depth = -1, const char* filename = NULL);
-    void        LogToClipboard(int max_depth = -1);
+    IMGUI_API void          LogButtons();
+    IMGUI_API void          LogToTTY(int max_depth = -1);
+    IMGUI_API void          LogToFile(int max_depth = -1, const char* filename = NULL);
+    IMGUI_API void          LogToClipboard(int max_depth = -1);
 
     // Utilities
-    void        SetNewWindowDefaultPos(const ImVec2& pos);                          // set position of window that do
-    bool        IsHovered();                                                        // was the last item active area hovered by mouse?
-    ImVec2      GetItemBoxMin();                                                    // get bounding box of last item
-    ImVec2      GetItemBoxMax();                                                    // get bounding box of last item
-    bool        IsClipped(const ImVec2& item_size);                                 // to perform coarse clipping on user's side (as an optimisation)
-    bool        IsKeyPressed(int key_index, bool repeat = true);                    // key_index into the keys_down[512] array, imgui doesn't know the semantic of each entry
-    bool        IsMouseClicked(int button, bool repeat = false);
-    bool        IsMouseDoubleClicked(int button);
-    bool        IsMouseHoveringWindow();                                            // is mouse hovering current window ("window" in API names always refer to current window)
-    bool        IsMouseHoveringAnyWindow();                                         // is mouse hovering any active imgui window
-    bool        IsMouseHoveringBox(const ImVec2& box_min, const ImVec2& box_max);   // is mouse hovering given bounding box
-    bool        IsPosHoveringAnyWindow(const ImVec2& pos);                          // is given position hovering any active imgui window
-    ImVec2      GetMousePos();                                                      // shortcut to ImGui::GetIO().MousePos provided by user, to be consistent with other calls
-    float       GetTime();
-    int         GetFrameCount();
-    const char* GetStyleColorName(ImGuiCol idx);
-    void        GetDefaultFontData(const void** fnt_data, unsigned int* fnt_size, const void** png_data, unsigned int* png_size);
-    ImVec2      CalcTextSize(const char* text, const char* text_end = NULL, const bool hide_text_after_hash = true);
+    IMGUI_API void          SetNewWindowDefaultPos(const ImVec2& pos);                          // set position of window that do
+    IMGUI_API bool          IsItemHovered();                                                    // was the last item active area hovered by mouse?
+    IMGUI_API bool          IsItemFocused();                                                    // was the last item focused for keyboard input?
+    IMGUI_API ImVec2        GetItemBoxMin();                                                    // get bounding box of last item
+    IMGUI_API ImVec2        GetItemBoxMax();                                                    // get bounding box of last item
+    IMGUI_API bool          IsClipped(const ImVec2& item_size);                                 // to perform coarse clipping on user's side (as an optimization)
+    IMGUI_API bool          IsKeyPressed(int key_index, bool repeat = true);                    // key_index into the keys_down[512] array, imgui doesn't know the semantic of each entry
+    IMGUI_API bool          IsMouseClicked(int button, bool repeat = false);
+    IMGUI_API bool          IsMouseDoubleClicked(int button);
+    IMGUI_API bool          IsMouseHoveringWindow();                                            // is mouse hovering current window ("window" in API names always refer to current window)
+    IMGUI_API bool          IsMouseHoveringAnyWindow();                                         // is mouse hovering any active imgui window
+    IMGUI_API bool          IsMouseHoveringBox(const ImVec2& box_min, const ImVec2& box_max);   // is mouse hovering given bounding box
+    IMGUI_API bool          IsPosHoveringAnyWindow(const ImVec2& pos);                          // is given position hovering any active imgui window
+    IMGUI_API ImVec2        GetMousePos();                                                      // shortcut to ImGui::GetIO().MousePos provided by user, to be consistent with other calls
+    IMGUI_API float         GetTime();
+    IMGUI_API int           GetFrameCount();
+    IMGUI_API const char*   GetStyleColorName(ImGuiCol idx);
+    IMGUI_API void          GetDefaultFontData(const void** fnt_data, unsigned int* fnt_size, const void** png_data, unsigned int* png_size);
+    IMGUI_API ImVec2        CalcTextSize(const char* text, const char* text_end = NULL, bool hide_text_after_hash = true, float wrap_width = -1.0f);
 
-}; // namespace ImGui
+} // namespace ImGui
 
 // Flags for ImGui::Begin()
 enum ImGuiWindowFlags_
@@ -294,7 +312,7 @@ enum ImGuiWindowFlags_
     ImGuiWindowFlags_ChildWindowAutoFitX    = 1 << 6,   // For internal use by BeginChild()
     ImGuiWindowFlags_ChildWindowAutoFitY    = 1 << 7,   // For internal use by BeginChild()
     ImGuiWindowFlags_ComboBox               = 1 << 8,   // For internal use by ComboBox()
-    ImGuiWindowFlags_Tooltip                = 1 << 9,   // For internal use by Render() when using Tooltip
+    ImGuiWindowFlags_Tooltip                = 1 << 9    // For internal use by Render() when using Tooltip
 };
 
 // Flags for ImGui::InputText()
@@ -304,7 +322,7 @@ enum ImGuiInputTextFlags_
     ImGuiInputTextFlags_CharsDecimal        = 1 << 0,   // Allow 0123456789.+-*/
     ImGuiInputTextFlags_CharsHexadecimal    = 1 << 1,   // Allow 0123456789ABCDEFabcdef
     ImGuiInputTextFlags_AutoSelectAll       = 1 << 2,   // Select entire text when first taking focus
-    ImGuiInputTextFlags_EnterReturnsTrue    = 1 << 3,   // Return 'true' when Enter is pressed (as opposed to when the value was modified)
+    ImGuiInputTextFlags_EnterReturnsTrue    = 1 << 3    // Return 'true' when Enter is pressed (as opposed to when the value was modified)
     //ImGuiInputTextFlags_AlignCenter       = 1 << 3,
 };
 
@@ -328,9 +346,10 @@ enum ImGuiKey_
     ImGuiKey_X,         // for CTRL+X: cut
     ImGuiKey_Y,         // for CTRL+Y: redo
     ImGuiKey_Z,         // for CTRL+Z: undo
-    ImGuiKey_COUNT,
+    ImGuiKey_COUNT
 };
 
+// Enumeration for PushStyleColor() / PopStyleColor()
 enum ImGuiCol_
 {
     ImGuiCol_Text,
@@ -370,15 +389,29 @@ enum ImGuiCol_
     ImGuiCol_PlotHistogramHovered,
     ImGuiCol_TextSelectedBg,
     ImGuiCol_TooltipBg,
-    ImGuiCol_COUNT,
+    ImGuiCol_COUNT
 };
 
+// Enumeration for PushStyleVar() / PopStyleVar()
+// NB: the enum only refers to fields of ImGuiStyle() which makes sense to be pushed/poped in UI code. Feel free to add others.
+enum ImGuiStyleVar_
+{
+    ImGuiStyleVar_Alpha,             // float
+    ImGuiStyleVar_WindowPadding,     // ImVec2
+    ImGuiStyleVar_FramePadding,      // ImVec2
+    ImGuiStyleVar_ItemSpacing,       // ImVec2
+    ImGuiStyleVar_ItemInnerSpacing,  // ImVec2
+    ImGuiStyleVar_TreeNodeSpacing,   // float
+    ImGuiStyleVar_ColumnsMinSpacing  // float 
+};
+
+// Enumeration for ColorEditMode()
 enum ImGuiColorEditMode_
 {
     ImGuiColorEditMode_UserSelect = -1,
     ImGuiColorEditMode_RGB = 0,
     ImGuiColorEditMode_HSV = 1,
-    ImGuiColorEditMode_HEX = 2,
+    ImGuiColorEditMode_HEX = 2
 };
 
 struct ImGuiStyle
@@ -398,7 +431,7 @@ struct ImGuiStyle
     float       ScrollBarWidth;             // Width of the vertical scroll bar
     ImVec4      Colors[ImGuiCol_COUNT];
 
-    ImGuiStyle();
+    IMGUI_API ImGuiStyle();
 };
 
 // This is where your app communicate with ImGui. Call ImGui::GetIO() to access.
@@ -461,7 +494,7 @@ struct ImGuiIO
     ImWchar     InputCharacters[16+1];      // List of characters input (translated by user from keypress+keyboard state). Fill using AddInputCharacter() helper.
 
     // Function
-    void        AddInputCharacter(ImWchar); // Helper to add a new character into InputCharacters[]
+    IMGUI_API void AddInputCharacter(ImWchar c); // Helper to add a new character into InputCharacters[]
 
     //------------------------------------------------------------------
     // Output - Retrieve after calling NewFrame(), you can use them to discard inputs or hide them from the rest of your application
@@ -483,7 +516,7 @@ struct ImGuiIO
     float       MouseDownTime[5];
     float       KeysDownTime[512];
 
-    ImGuiIO();
+    IMGUI_API ImGuiIO();
 };
 
 //-----------------------------------------------------------------------------
@@ -518,7 +551,7 @@ struct ImGuiTextFilter
         char front() const { return *b; }
         static bool isblank(char c) { return c == ' ' || c == '\t'; }
         void trim_blanks() { while (b < e && isblank(*b)) b++; while (e > b && isblank(*(e-1))) e--; }
-        void split(char separator, ImVector<TextRange>& out);
+        IMGUI_API void split(char separator, ImVector<TextRange>& out);
     };
 
     char                InputBuf[256];
@@ -530,7 +563,7 @@ struct ImGuiTextFilter
     void Draw(const char* label = "Filter (inc,-exc)", float width = -1.0f);    // Helper calling InputText+Build
     bool PassFilter(const char* val) const;
     bool IsActive() const { return !Filters.empty(); }
-    void Build();
+    IMGUI_API void Build();
 };
 
 // Helper: Text buffer for logging/accumulating text
@@ -539,12 +572,13 @@ struct ImGuiTextBuffer
     ImVector<char>      Buf;
 
     ImGuiTextBuffer()   { Buf.push_back(0); }
-    const char*         begin() const { return Buf.begin(); }
-    const char*         end() const { return Buf.end()-1; }
+    ~ImGuiTextBuffer()  { clear(); }
+    const char*         begin() const { return &Buf.front(); }
+    const char*         end() const { return &Buf.back(); }      // Buf is zero-terminated, so end() will point on the zero-terminator
     size_t              size() const { return Buf.size()-1; }
     bool                empty() { return Buf.empty(); }
     void                clear() { Buf.clear(); Buf.push_back(0); }
-    void                append(const char* fmt, ...);
+    IMGUI_API void      append(const char* fmt, ...);
 };
 
 // Helper: Key->value storage
@@ -557,13 +591,13 @@ struct ImGuiStorage
     struct Pair { ImU32 key; int val; };
     ImVector<Pair>  Data;
 
-    void    Clear();
-    int     GetInt(ImU32 key, int default_val = 0);
-    void    SetInt(ImU32 key, int val);
-    void    SetAllInt(int val);
+    IMGUI_API void    Clear();
+    IMGUI_API int     GetInt(ImU32 key, int default_val = 0);
+    IMGUI_API void    SetInt(ImU32 key, int val);
+    IMGUI_API void    SetAllInt(int val);
 
-    int*    Find(ImU32 key);
-    void    Insert(ImU32 key, int val);
+    IMGUI_API int*    Find(ImU32 key);
+    IMGUI_API void    Insert(ImU32 key, int val);
 };
 
 //-----------------------------------------------------------------------------
@@ -577,12 +611,20 @@ struct ImDrawCmd
     ImVec4          clip_rect;
 };
 
+#ifndef IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT
+// Default vertex layout
 struct ImDrawVert
 {
     ImVec2  pos;
     ImVec2  uv;
     ImU32   col;
 };
+#else
+// You can change the vertex format layout by defining IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT.
+// The code expect ImVec2 pos (8 bytes), ImVec2 uv (8 bytes), ImU32 col (4 bytes), but you can re-order them or add other fields as needed to simplify integration in your engine.
+// The type has to be described by the #define (you can either declare the struct or use a typedef)
+IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT;
+#endif
 
 // Draw command list
 // This is the low-level list of polygon that ImGui:: functions are filling. At the end of the frame, all command lists are passed to your ImGuiIO::RenderDrawListFn function for rendering.
@@ -602,22 +644,22 @@ struct ImDrawList
 
     ImDrawList() { Clear(); }
 
-    void Clear();
-    void PushClipRect(const ImVec4& clip_rect);
-    void PopClipRect();
-    void ReserveVertices(unsigned int vtx_count);
-    void AddVtx(const ImVec2& pos, ImU32 col);
-    void AddVtxLine(const ImVec2& a, const ImVec2& b, ImU32 col);
+    IMGUI_API void  Clear();
+    IMGUI_API void  PushClipRect(const ImVec4& clip_rect);
+    IMGUI_API void  PopClipRect();
+    IMGUI_API void  ReserveVertices(unsigned int vtx_count);
+    IMGUI_API void  AddVtx(const ImVec2& pos, ImU32 col);
+    IMGUI_API void  AddVtxLine(const ImVec2& a, const ImVec2& b, ImU32 col);
 
-    // Primitives
-    void AddLine(const ImVec2& a, const ImVec2& b, ImU32 col);
-    void AddRect(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
-    void AddRectFilled(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
-    void AddTriangleFilled(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col);
-    void AddCircle(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
-    void AddCircleFilled(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
-    void AddArc(const ImVec2& center, float rad, ImU32 col, int a_min, int a_max, bool tris=false, const ImVec2& third_point_offset = ImVec2(0,0));
-    void AddText(ImFont font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end);
+    // Primitives   
+    IMGUI_API void  AddLine(const ImVec2& a, const ImVec2& b, ImU32 col);
+    IMGUI_API void  AddRect(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
+    IMGUI_API void  AddRectFilled(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
+    IMGUI_API void  AddTriangleFilled(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col);
+    IMGUI_API void  AddCircle(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
+    IMGUI_API void  AddCircleFilled(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
+    IMGUI_API void  AddArc(const ImVec2& center, float rad, ImU32 col, int a_min, int a_max, bool tris = false, const ImVec2& third_point_offset = ImVec2(0,0));
+    IMGUI_API void  AddText(ImFont font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end = NULL, float wrap_width = 0.0f);
 };
 
 // Optional bitmap font data loader & renderer into vertices
@@ -686,18 +728,23 @@ struct ImBitmapFont
     ImVector<const char*>   Filenames;          // (point into raw data)
     ImVector<int>           IndexLookup;        // (built)
 
-    ImBitmapFont();
-    ~ImBitmapFont() { Clear(); }
+    IMGUI_API ImBitmapFont();
+    IMGUI_API ~ImBitmapFont()      { Clear(); }
 
-    bool                    LoadFromMemory(const void* data, size_t data_size);
-    bool                    LoadFromFile(const char* filename);
-    void                    Clear();
-    void                    BuildLookupTable();
-    const FntGlyph *        FindGlyph(unsigned short c) const;
-    float                   GetFontSize() const { return (float)Info->FontSize; }
-    bool                    IsLoaded() const { return Info != NULL && Common != NULL && Glyphs != NULL; }
+    IMGUI_API bool                 LoadFromMemory(const void* data, size_t data_size);
+    IMGUI_API bool                 LoadFromFile(const char* filename);
+    IMGUI_API void                 Clear();
+    IMGUI_API void                 BuildLookupTable();
+    IMGUI_API const FntGlyph *     FindGlyph(unsigned short c, const FntGlyph* fallback = NULL) const;
+    IMGUI_API float                GetFontSize() const { return (float)Info->FontSize; }
+    IMGUI_API bool                 IsLoaded() const { return Info != NULL && Common != NULL && Glyphs != NULL; }
 
-    ImVec2                  CalcTextSizeA(float size, float max_width, const char* text_begin, const char* text_end, const char** remaining = NULL) const;            // utf8
-    ImVec2                  CalcTextSizeW(float size, float max_width, const ImWchar* text_begin, const ImWchar* text_end, const ImWchar** remaining = NULL) const;  // wchar
-    void                    RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawVert*& out_vertices) const;
+    // 'max_width' stops rendering after a certain width (could be turned into a 2d size). FLT_MAX to disable.
+    // 'wrap_width' enable automatic word-wrapping across multiple lines to fit into given width. 0.0f to disable.
+    IMGUI_API ImVec2               CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8
+    IMGUI_API ImVec2               CalcTextSizeW(float size, float max_width, const ImWchar* text_begin, const ImWchar* text_end, const ImWchar** remaining = NULL) const;                 // wchar
+    IMGUI_API void                 RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawVert*& out_vertices, float wrap_width = 0.0f) const;
+
+private:
+    IMGUI_API const char*          CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width, const FntGlyph* fallback_glyph) const;
 };