Updated imgui

ChangeLog.md

 
 ## OpenRaider (0.1.3) xythobuz <xythobuz@xythobuz.de>
 
+    [ 20140203 ]
+    * Updated imgui to newest version, supporting Images
+    * Imgui Image texture viewer (still buggy)
+
     [ 20140124 ]
     * Started working on Entity system.
 

include/TextureManager.h

     SYSTEM
 };
 
-/*!
- * \brief Texture registry
- */
+class BufferManager {
+  public:
+    BufferManager(int t, TextureStorage s) : texture(t), storage(s) { }
+    int getTextureID() { return texture; }
+    TextureStorage getTextureStorage() { return storage; }
+
+  private:
+    int texture;
+    TextureStorage storage;
+};
+
 class TextureManager {
   public:
     static int initialize();
     static int getFirstTileAnimation(int index);
     static int getNextTileAnimation(int tile);
 
+    static BufferManager* getBufferManager(int tex, TextureStorage store);
+
   private:
     static std::vector<unsigned int>& getIds(TextureStorage s);
     static std::vector<int>& getUnits(TextureStorage s);
     static std::vector<int> gameUnits;
     static std::vector<int> systemUnits;
     static unsigned int nextFreeTextureUnit;
+
+    static std::vector<BufferManager> gameBuffers;
+    static std::vector<BufferManager> systemBuffers;
 };
 
 #endif

src/TextureManager.cpp

 std::vector<int> TextureManager::gameUnits;
 std::vector<int> TextureManager::systemUnits;
 unsigned int TextureManager::nextFreeTextureUnit = 0;
+std::vector<BufferManager> TextureManager::gameBuffers;
+std::vector<BufferManager> TextureManager::systemBuffers;
 
 int TextureManager::initialize() {
     assert(mTextureIdsGame.size() == 0);
     }
 
     clear();
+
+    systemBuffers.clear();
 }
 
 void TextureManager::clear() {
     gameUnits.clear();
     systemUnits.clear();
     nextFreeTextureUnit = 0;
+
+    gameBuffers.clear();
 }
 
 int TextureManager::loadBufferSlot(unsigned char* image,
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
     }
 
+    Log::get(LOG_DEBUG) << "New Texture: " << slot << " - "
+        << ((s == TextureStorage::GAME) ? "Game" : "System") << Log::endl;
+
     return slot;
 }
 
 }
 
 int TextureManager::bindTexture(unsigned int n, TextureStorage s) {
+    if (n >= getIds(s).size()) {
+        Log::get(LOG_DEBUG) << "Bound Unknown Texture " << n << " in "
+            << ((s == TextureStorage::GAME) ? "Game" : "System") << Log::endl;
+    }
+
     assert(n < getIds(s).size());
 
     if ((n < getUnits(s).size()) && (getUnits(s).at(n) >= 0)) {
     return -1;
 }
 
+BufferManager* TextureManager::getBufferManager(int tex, TextureStorage store) {
+    auto& v = (store == TextureStorage::GAME) ? gameBuffers : systemBuffers;
+    while (v.size() <= tex) {
+        v.emplace_back(v.size(), store);
+
+        Log::get(LOG_DEBUG) << "New BufferManager: " << v.size() - 1 << " - "
+            << ((store == TextureStorage::GAME) ? "Game" : "System") << Log::endl;
+    }
+    return &(v.at(tex));
+}
+
 int TextureManager::loadImage(std::string filename, TextureStorage s, int slot) {
     if (stringEndsWith(filename, ".pcx")) {
         return loadPCX(filename, s, slot);

src/UI.cpp

     io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
     fontTex = TextureManager::loadBufferSlot(pixels, width, height, ColorMode::RGBA, 32,
                                              TextureStorage::SYSTEM, -1, false);
+    io.Fonts->TexID = TextureManager::getBufferManager(fontTex, TextureStorage::SYSTEM);
 
     // Set up OpenRaider style
     ImGuiStyle& style = ImGui::GetStyle();
     if (ImGui::Begin("Engine", &visible, ImVec2(400, 400))) {
         Render::displayUI();
         RunTime::display();
-        SoundManager::display();
 
-        /*
-        static bool visibleTex = false;
-        static bool visibleTile = false;
-        static bool visibleAnim = false;
-        static bool visibleSprite = false;
         if (ImGui::CollapsingHeader("Texture Viewer")) {
             static bool game = Game::isLoaded();
             static int index = 0;
-            ImGui::PushItemWidth(ImGui::GetWindowWidth() * 0.5f);
-            ImGui::SliderInt("##texslide", &index, 0, TextureManager::.numTextures(
+            ImGui::SliderInt("##texslide", &index, 0, TextureManager::numTextures(
                                  game ? TextureStorage::GAME : TextureStorage::SYSTEM) - 1);
-            ImGui::PopItemWidth();
             ImGui::SameLine();
             if (ImGui::Button("+##texplus", ImVec2(0, 0), true)) {
                 if (index < (TextureManager::numTextures(
                     index = TextureManager::numTextures(
                                 game ? TextureStorage::GAME : TextureStorage::SYSTEM) - 1;
             }
-            ImGui::SameLine();
-            if ((TextureManager::numTextures() > 0)) {
+
+            if ((TextureManager::numTextures(TextureStorage::GAME) > 0)) {
+                ImGui::SameLine();
                 ImGui::Checkbox("Game##texgame", &game);
             } else {
                 game = false;
             }
-            ImGui::SameLine();
-            if (ImGui::Button("Show##texshow")) {
-                visibleTex = true;
-                visibleTile = false;
-                visibleAnim = false;
-                visibleSprite = false;
-            }
-            ImGui::SameLine();
-            if (ImGui::Button("Clear##texclear")) {
-                getRender().debugDisplayTexture();
-                visibleTex = false;
-            }
-            if (visibleTex) {
-                getRender().debugDisplayTexture(index,
-                                                game ? TextureStorage::GAME : TextureStorage::SYSTEM,
-                                                ImGui::GetWindowPos().x - ImGui::GetWindowWidth(),
-                                                ImGui::GetWindowPos().y,
-                                                ImGui::GetWindowWidth(), ImGui::GetWindowWidth());
+
+            if (index >= TextureManager::numTextures(game ? TextureStorage::GAME : TextureStorage::SYSTEM)) {
+                index = TextureManager::numTextures(game ? TextureStorage::GAME : TextureStorage::SYSTEM) - 1;
+                if (index < 0) {
+                    game = false;
+                    index = 0;
+                }
             }
+
+            ImGui::Image(TextureManager::getBufferManager(index,
+                                                          game ? TextureStorage::GAME
+                                                            : TextureStorage::SYSTEM),
+                         ImVec2(ImGui::GetColumnWidth() * 2 / 3, ImGui::GetColumnWidth() * 2 / 3));
         }
 
+        SoundManager::display();
+
+        /*
+        static bool visibleTex = false;
+        static bool visibleTile = false;
+        static bool visibleAnim = false;
+        static bool visibleSprite = false;
+
+
         if (ImGui::CollapsingHeader("Textile Viewer")) {
             if (TextureManager::numTiles() > 0) {
                 static int index = 0;
 
     imguiShader.use();
     imguiShader.loadUniform(0, Window::getSize());
-    imguiShader.loadUniform(1, fontTex, TextureStorage::SYSTEM);
     vert.bindBuffer(0, 2);
     uv.bindBuffer(1, 2);
     col.bindBuffer(2, 4);
             uv.bufferData(uvs);
             col.bufferData(colors);
 
+            auto bm = static_cast<BufferManager*>(commands[n].texture_id);
+            assert(bm != nullptr);
+            imguiShader.loadUniform(1, bm->getTextureID(), bm->getTextureStorage());
+
             glScissor(commands[n].clip_rect.x,
                       Window::getSize().y - commands[n].clip_rect.w,
                       commands[n].clip_rect.z - commands[n].clip_rect.x,

src/deps/imgui/imgui.h

-// ImGui library v1.30 wip
+// ImGui library v1.31 wip
 // 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.
 
 #pragma once
 
+struct ImDrawCmd;
 struct ImDrawList;
 struct ImFont;
 struct ImFontAtlas;
 
 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.
+    // Proxy functions to access the MemAllocFn/MemFreeFn pointers in ImGui::GetIO(). The only reason they exist here is to allow ImVector<> to compile inline.
     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). 
     inline const value_type&    back() const                    { IM_ASSERT(Size > 0); return Data[Size-1]; }
     inline void                 swap(ImVector<T>& rhs)          { const size_t rhs_size = rhs.Size; rhs.Size = Size; Size = rhs_size; const size_t rhs_cap = rhs.Capacity; rhs.Capacity = Capacity; Capacity = rhs_cap; value_type* rhs_data = rhs.Data; rhs.Data = Data; Data = rhs_data; }
 
-    inline void                 reserve(size_t new_capacity)    { Data = (value_type*)ImGui::MemRealloc(Data, new_capacity * sizeof(value_type)); Capacity = new_capacity; }
     inline void                 resize(size_t new_size)         { if (new_size > Capacity) reserve(new_size); Size = new_size; }
+    inline void                 reserve(size_t new_capacity)    
+    { 
+        if (new_capacity <= Capacity) return;
+        T* new_data = (value_type*)ImGui::MemAlloc(new_capacity * sizeof(value_type));
+        memcpy(new_data, Data, Size * sizeof(value_type));
+        ImGui::MemFree(Data);
+        Data = new_data;
+        Capacity = new_capacity; 
+    }
 
     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--; }
     IMGUI_API void          BulletTextV(const char* fmt, va_list args);
     IMGUI_API bool          Button(const char* label, const ImVec2& size = ImVec2(0,0), bool repeat_when_held = false);
     IMGUI_API bool          SmallButton(const char* label);
-    IMGUI_API void          Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0), const ImVec2& uv1 = ImVec2(1,1), ImU32 tint_col = 0xFFFFFFFF, ImU32 border_col = 0x00000000);
+    IMGUI_API bool          InvisibleButton(const char* str_id, const ImVec2& size);
+    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));    // <0 frame_padding uses default frame padding settings. 0 for no paddnig.
     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 void          LogText(const char* fmt, ...);                                      // pass text data straight to log (without being displayed)
 
     // Utilities
-    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 bool          IsItemHovered();                                                    // was the last item hovered by mouse?
+    IMGUI_API bool          IsItemActive();                                                     // was the last item active? (e.g. button being held, text field being edited- items that don't interact will always return false)
     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 const char*   GetStyleColName(ImGuiCol idx);
     IMGUI_API ImVec2        CalcTextSize(const char* text, const char* text_end = NULL, bool hide_text_after_double_hash = false, float wrap_width = -1.0f);
 
+    IMGUI_API ImU32         ColorConvertFloat4ToU32(const ImVec4& in);
+    IMGUI_API void          ColorConvertRGBtoHSV(float r, float g, float b, float& out_h, float& out_s, float& out_v);
+    IMGUI_API void          ColorConvertHSVtoRGB(float h, float s, float v, float& out_r, float& out_g, float& out_b);
+
+    // Obsolete (will be removed)
+    IMGUI_API void          GetDefaultFontData(const void** fnt_data, unsigned int* fnt_size, const void** png_data, unsigned int* png_size);
+
 } // namespace ImGui
 
 // Flags for ImGui::Begin()
 enum ImGuiWindowFlags_
 {
     // Default: 0
-    ImGuiWindowFlags_ShowBorders            = 1 << 0,
-    ImGuiWindowFlags_NoTitleBar             = 1 << 1,
-    ImGuiWindowFlags_NoResize               = 1 << 2,
-    ImGuiWindowFlags_NoMove                 = 1 << 3,
-    ImGuiWindowFlags_NoScrollbar            = 1 << 4,
-    ImGuiWindowFlags_NoScrollWithMouse      = 1 << 5,
-    ImGuiWindowFlags_AlwaysAutoResize       = 1 << 6,
-    ImGuiWindowFlags_NoSavedSettings        = 1 << 7,   // Never load/save settings in .ini file
-    ImGuiWindowFlags_ChildWindow            = 1 << 8,   // For internal use by BeginChild()
-    ImGuiWindowFlags_ChildWindowAutoFitX    = 1 << 9,   // For internal use by BeginChild()
-    ImGuiWindowFlags_ChildWindowAutoFitY    = 1 << 10,  // For internal use by BeginChild()
-    ImGuiWindowFlags_ComboBox               = 1 << 11,  // For internal use by ComboBox()
-    ImGuiWindowFlags_Tooltip                = 1 << 12   // For internal use by Render() when using Tooltip
+    ImGuiWindowFlags_NoTitleBar             = 1 << 0,   // Disable title-bar
+    ImGuiWindowFlags_NoResize               = 1 << 1,   // Disable user resizing with the lower-right grip
+    ImGuiWindowFlags_NoMove                 = 1 << 2,   // Disable user moving the window
+    ImGuiWindowFlags_NoScrollbar            = 1 << 3,   // Disable scroll bar (window can still scroll with mouse or programatically)
+    ImGuiWindowFlags_NoScrollWithMouse      = 1 << 4,   // Disable user scrolling with mouse wheel
+    ImGuiWindowFlags_NoCollapse             = 1 << 5,   // Disable user collapsing window by double-clicking on it
+    ImGuiWindowFlags_AlwaysAutoResize       = 1 << 6,   // Resize every window to its content every frame
+    ImGuiWindowFlags_ShowBorders            = 1 << 7,   // Show borders around windows and items
+    ImGuiWindowFlags_NoSavedSettings        = 1 << 8,   // Never load/save settings in .ini file
+    // [Internal]
+    ImGuiWindowFlags_ChildWindow            = 1 << 9,   // For internal use by BeginChild()
+    ImGuiWindowFlags_ChildWindowAutoFitX    = 1 << 10,  // For internal use by BeginChild()
+    ImGuiWindowFlags_ChildWindowAutoFitY    = 1 << 11,  // For internal use by BeginChild()
+    ImGuiWindowFlags_ComboBox               = 1 << 12,  // For internal use by ComboBox()
+    ImGuiWindowFlags_Tooltip                = 1 << 13   // For internal use by BeginTooltip()
 };
 
 // Flags for ImGui::InputText()
     ImFontAtlas*  Fonts;                    // <auto>               // Load and assemble one or more fonts into a single tightly packed texture. Output to Fonts array.
     float         FontGlobalScale;          // = 1.0f               // Global scale all fonts
     bool          FontAllowUserScaling;     // = false              // Allow user scaling text of individual window with CTRL+Wheel.
+    ImVec2        DisplayVisibleMin;        // <unset> (0.0f,0.0f)  // If you use DisplaySize as a virtual space larger than your screen, set DisplayVisibleMin/Max to the visible area.
+    ImVec2        DisplayVisibleMax;        // <unset> (0.0f,0.0f)  // If the values are the same, we defaults to Min=(0.0f) and Max=DisplaySize
 
     //------------------------------------------------------------------
     // User Functions
     const char* (*GetClipboardTextFn)();
     void        (*SetClipboardTextFn)(const char* text);
 
-    // Optional: override memory allocations (default to posix malloc/realloc/free)
+    // Optional: override memory allocations (default to posix malloc/free). MemFreeFn() may be called with a NULL pointer.
     void*       (*MemAllocFn)(size_t sz);
-    void*       (*MemReallocFn)(void* ptr, size_t sz);
     void        (*MemFreeFn)(void* ptr);
 
     // Optional: notify OS Input Method Editor of the screen position of your cursor for text input position (e.g. when using Japanese/Chinese inputs in Windows)
 
     ImVec2      MousePos;                   // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
     bool        MouseDown[5];               // Mouse buttons. ImGui itself only uses button 0 (left button) but you can use others as storage for convenience.
-    float       MouseWheel;                 // Mouse wheel: 1 unit scrolls about 5 lines text.  
+    float       MouseWheel;                 // Mouse wheel: 1 unit scrolls about 5 lines text. 
+    bool        MouseDrawCursor;            // Request ImGui to draw a mouse cursor for you (if you are on a platform without a mouse cursor).
     bool        KeyCtrl;                    // Keyboard modifier pressed: Control
     bool        KeyShift;                   // Keyboard modifier pressed: Shift
     bool        KeysDown[512];              // Keyboard keys that are pressed (in whatever order user naturally has access to keyboard data)
     struct Pair 
     { 
         ImGuiID key; 
-        union { int val_i; float val_f; };        
+        union { int val_i; float val_f; void* val_p; };        
         Pair(ImGuiID _key, int _val_i) { key = _key; val_i = _val_i; } 
         Pair(ImGuiID _key, float _val_f) { key = _key; val_f = _val_f; } 
+        Pair(ImGuiID _key, void* _val_p) { key = _key; val_p = _val_p; } 
     };
     ImVector<Pair>    Data;
 
     // - Get***() functions find pair, never add/allocate. Pairs are sorted so a query is O(log N)
     // - Set***() functions find pair, insertion on demand if missing.
-    // - Get***Ptr() functions find pair, insertion on demand if missing, return pointer. Useful if you intend to do Get+Set. 
-    //   A typical use case where this is very convenient:
-    //      float* pvar = ImGui::GetIntPtr(key); ImGui::SliderInt("var", pvar, 0, 100); some_var += *pvar;
     // - Sorted insertion is costly but should amortize. A typical frame shouldn't need to insert any new pair.
     IMGUI_API void    Clear();
     IMGUI_API int     GetInt(ImGuiID key, int default_val = 0) const;
     IMGUI_API void    SetInt(ImGuiID key, int val);
-    IMGUI_API int*    GetIntPtr(ImGuiID key, int default_val = 0);
     IMGUI_API float   GetFloat(ImGuiID key, float default_val = 0.0f) const;
     IMGUI_API void    SetFloat(ImGuiID key, float val);
-    IMGUI_API float*  GetFloatPtr(ImGuiID key, float default_val = 0);
-    IMGUI_API void    SetAllInt(int val);    // Use on your own storage if you know only integer are being stored.
+    IMGUI_API void*   GetVoidPtr(ImGuiID key) const; // default_val is NULL
+    IMGUI_API void    SetVoidPtr(ImGuiID key, void* val);
+
+    // - Get***Ref() functions finds pair, insert on demand if missing, return pointer. Useful if you intend to do Get+Set. 
+    // - References are only valid until a new value is added to the storage. Calling a Set***() function or a Get***Ref() function invalidates the pointer.
+    // - A typical use case where this is convenient:
+    //      float* pvar = ImGui::GetFloatRef(key); ImGui::SliderFloat("var", pvar, 0, 100.0f); some_var += *pvar;
+    // - You can also use this to quickly create temporary editable values during a session of using Edit&Continue, without restarting your application.
+    IMGUI_API int*    GetIntRef(ImGuiID key, int default_val = 0);
+    IMGUI_API float*  GetFloatRef(ImGuiID key, float default_val = 0);
+
+    // Use on your own storage if you know only integer are being stored (open/close all tree nodes)
+    IMGUI_API void    SetAllInt(int val);
 };
 
 // Shared state of InputText(), passed to callback when a ImGuiInputTextFlags_Callback* flag is used.
     void InsertChars(int pos, const char* text, const char* text_end = NULL);
 };
 
+// ImColor() is just a helper that implicity converts to either ImU32 (packed 4x1 byte) or ImVec4 (4x1 float)
+// None of the ImGui API are using ImColor directly but you can use it as a convenience to pass colors in either formats.
+struct ImColor
+{
+    ImVec4              Value;
+
+    ImColor(int r, int g, int b, int a = 255)                       { Value.x = (float)r / 255.0f; Value.y = (float)g / 255.0f; Value.z = (float)b / 255.0f; Value.w = (float)a / 255.0f; }
+    ImColor(float r, float g, float b, float a = 1.0f)              { Value.x = r; Value.y = g; Value.z = b; Value.w = a; }
+    ImColor(const ImVec4& col)                                      { Value = col; }
+
+    operator ImU32() const                                          { return ImGui::ColorConvertFloat4ToU32(Value); }
+    operator ImVec4() const                                         { return Value; }
+
+    static ImColor HSV(float h, float s, float v, float a = 1.0f)   { float r,g,b; ImGui::ColorConvertHSVtoRGB(h, s, v, r, g, b); return ImColor(r,g,b,a); }
+};
+
 //-----------------------------------------------------------------------------
 // Draw List
-// Hold a series of drawing commands. The user provides a renderer for ImDrawList
+// Hold a series of drawing commands. The user provides a renderer for ImDrawList.
 //-----------------------------------------------------------------------------
 
+// Draw callbacks for advanced uses.
+// NB- You most likely DO NOT need to care about draw callbacks just to create your own widget or customized UI rendering (you can poke into the draw list for that)
+// Draw callback are useful for example if you want to render a complex 3D scene inside a UI element.
+// The expected behavior from your rendering loop is:
+//   if (cmd.user_callback != NULL)
+//       cmd.user_callback(parent_list, cmd);
+//   else
+//       RenderTriangles()
+// It is up to you to decide if your rendering loop or the callback should be responsible for backup/restoring rendering state.
+typedef void (*ImDrawCallback)(const ImDrawList* parent_list, const ImDrawCmd* cmd);
+
+// Typically, 1 command = 1 gpu draw call
 struct ImDrawCmd
 {
-    unsigned int    vtx_count;
-    ImVec4          clip_rect;
-    ImTextureID     texture_id;     // Copy of user-provided 'TexID' from ImFont or passed to Image*() functions. Ignore if not using images or multiple fonts.
+    unsigned int    vtx_count;                  // Number of vertices (multiple of 3) to be drawn as triangles. The vertices are stored in the callee ImDrawList's vtx_buffer[] array.
+    ImVec4          clip_rect;                  // Clipping rectangle (x1, y1, x2, y2)
+    ImTextureID     texture_id;                 // User-provided texture ID. Set by user in ImfontAtlas::SetTexID() for fonts or passed to Image*() functions. Ignore if never using images or multiple fonts atlas.
+    ImDrawCallback  user_callback;              // If != NULL, call the function instead of rendering the vertices. vtx_count will be 0. clip_rect and texture_id will be set normally.
+    void*           user_callback_data;         // The draw callback code can access this.
 };
 
+// Vertex layout
 #ifndef IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT
-// Default vertex layout
 struct ImDrawVert
 {
     ImVec2  pos;
 #endif
 
 // Draw command list
-// This is the low-level list of polygon that ImGui:: functions are creating. At the end of the frame, all command lists are passed to your ImGuiIO::RenderDrawListFn function for rendering.
-// At the moment, each ImGui window contains its own ImDrawList but they could potentially be merged.
+// This is the low-level list of polygons that ImGui functions are filling. At the end of the frame, all command lists are passed to your ImGuiIO::RenderDrawListFn function for rendering.
+// 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.
 // 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
 {
     // This is what you have to render
-    ImVector<ImDrawCmd>     commands;           // commands
-    ImVector<ImDrawVert>    vtx_buffer;         // each command consume ImDrawCmd::vtx_count of those
+    ImVector<ImDrawCmd>     commands;           // Commands. Typically 1 command = 1 gpu draw call.
+    ImVector<ImDrawVert>    vtx_buffer;         // Vertex buffer. Each command consume ImDrawCmd::vtx_count of those
 
     // [Internal to ImGui]
-    ImVector<ImVec4>        clip_rect_stack;    // [internal]
-    ImVector<ImTextureID>   texture_id_stack;   // [internal] 
-    ImDrawVert*             vtx_write;          // [internal] point within vtx_buffer after each add command (to avoid using the ImVector<> operators too much)
+    ImVector<ImVec4>        clip_rect_stack;    // [Internal]
+    ImVector<ImTextureID>   texture_id_stack;   // [Internal] 
+    ImDrawVert*             vtx_write;          // [Internal] point within vtx_buffer after each add command (to avoid using the ImVector<> operators too much)
 
     ImDrawList() { Clear(); }
-
     IMGUI_API void  Clear();
-    IMGUI_API void  SetClipRect(const ImVec4& clip_rect);
     IMGUI_API void  PushClipRect(const ImVec4& clip_rect);
     IMGUI_API void  PopClipRect();
-    IMGUI_API void  SetTextureID(const ImTextureID& texture_id);
     IMGUI_API void  PushTextureID(const ImTextureID& texture_id);
     IMGUI_API void  PopTextureID();
-    IMGUI_API void  ReserveVertices(unsigned int vtx_count);
-    IMGUI_API void  AddVtx(const ImVec2& pos, ImU32 col);
-    IMGUI_API void  AddVtxUV(const ImVec2& pos, ImU32 col, const ImVec2& uv);
-    IMGUI_API void  AddVtxLine(const ImVec2& a, const ImVec2& b, ImU32 col);
 
     // Primitives   
     IMGUI_API void  AddLine(const ImVec2& a, const ImVec2& b, ImU32 col);
     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);
-    IMGUI_API void  AddImage(ImTextureID user_texture_id, const ImVec2& a, const ImVec2& b, const ImVec2& uv0, const ImVec2& uv1, ImU32 col);
+    IMGUI_API void  AddImage(ImTextureID user_texture_id, const ImVec2& a, const ImVec2& b, const ImVec2& uv0, const ImVec2& uv1, ImU32 col = 0xFFFFFFFF);
+
+    // Advanced
+    IMGUI_API void  AddCallback(ImDrawCallback callback, void* callback_data);   // Your rendering function must check for 'user_callback' in ImDrawCmd and call the function instead of rendering triangles.
+    IMGUI_API void  AddDrawCmd();               // This is useful if you need to forcefully create a new draw call (to allow for dependent rendering / blending). Otherwise primitives are merged into the same draw-call as much as possible
+
+    // Internal helpers
+    IMGUI_API void  ReserveVertices(unsigned int vtx_count);
+    IMGUI_API void  AddVtx(const ImVec2& pos, ImU32 col);
+    IMGUI_API void  AddVtxUV(const ImVec2& pos, ImU32 col, const ImVec2& uv);
+    IMGUI_API void  AddVtxLine(const ImVec2& a, const ImVec2& b, ImU32 col);
+    IMGUI_API void  UpdateClipRect();
+    IMGUI_API void  UpdateTextureID();
 };
 
 // Load and rasterize multiple TTF fonts into a same texture.
     // User is in charge of copying the pixels into graphics memory, then call SetTextureUserID()
     // After loading the texture into your graphic system, store your texture handle in 'TexID' (ignore if you aren't using multiple fonts nor images)
     // RGBA32 format is provided for convenience and high compatibility, but note that all RGB pixels are white, so 75% of the memory is wasted.
+    // Pitch = Width * BytesPerPixels
     IMGUI_API void              GetTexDataAsAlpha8(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL);  // 1 byte per-pixel
     IMGUI_API void              GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_width, int* out_height, int* out_bytes_per_pixel = NULL);  // 4 bytes-per-pixel
     IMGUI_API void              SetTexID(void* id)  { TexID = id; }
     ImVector<ImFontAtlasData*>  InputData;          // Internal data
     IMGUI_API bool              Build();            // Build pixels data. This is automatically for you by the GetTexData*** functions.
     IMGUI_API void              ClearInputData();   // Clear the input TTF data.
+    IMGUI_API void              RenderCustomTexData();
 };
 
 // TTF font loading and rendering

src/deps/imgui/stb_textedit.h

-// stb_textedit.h - v1.5  - public domain - Sean Barrett
+// stb_textedit.h - v1.4  - public domain - Sean Barrett
 // Development of this library was sponsored by RAD Game Tools
 //
 // This C header file implements the guts of a multi-line text-editing
 //
 // VERSION HISTORY
 //
-//   1.5  (2014-09-10) add support for secondary keys for OS X
 //   1.4  (2014-08-17) fix signed/unsigned warnings
 //   1.3  (2014-06-19) fix mouse clicking to round to nearest char boundary
 //   1.2  (2014-05-27) fix some RAD types that had crept into the new code
 //
 //   Ulf Winklemann: move-by-word in 1.1
 //   Scott Graham: mouse selection bugfix in 1.3
-//   Fabian Giesen: secondary key inputs in 1.5
 //
 // USAGE
 //
 //                                 required for WORDLEFT/WORDRIGHT
 //    STB_TEXTEDIT_K_WORDLEFT    keyboard input to move cursor left one word // e.g. ctrl-LEFT
 //    STB_TEXTEDIT_K_WORDRIGHT   keyboard input to move cursor right one word // e.g. ctrl-RIGHT
-//    STB_TEXTEDIT_K_LINESTART2  secondary keyboard input to move cursor to start of line
-//    STB_TEXTEDIT_K_LINEEND2    secondary keyboard input to move cursor to end of line
-//    STB_TEXTEDIT_K_TEXTSTART2  secondary keyboard input to move cursor to start of text
-//    STB_TEXTEDIT_K_TEXTEND2    secondary keyboard input to move cursor to end of text
 //
 // Todo:
 //    STB_TEXTEDIT_K_PGUP        keyboard input to move cursor up a page
          state->has_preferred_x = 0;
          break;
          
-#ifdef STB_TEXTEDIT_K_TEXTSTART2
-      case STB_TEXTEDIT_K_TEXTSTART2:
-#endif
       case STB_TEXTEDIT_K_TEXTSTART:
          state->cursor = state->select_start = state->select_end = 0;
          state->has_preferred_x = 0;
          break;
 
-#ifdef STB_TEXTEDIT_K_TEXTEND2
-      case STB_TEXTEDIT_K_TEXTEND2:
-#endif
       case STB_TEXTEDIT_K_TEXTEND:
          state->cursor = STB_TEXTEDIT_STRINGLEN(str);
          state->select_start = state->select_end = 0;
          state->has_preferred_x = 0;
          break;
         
-#ifdef STB_TEXTEDIT_K_TEXTSTART2
-      case STB_TEXTEDIT_K_TEXTSTART2 | STB_TEXTEDIT_K_SHIFT:
-#endif
       case STB_TEXTEDIT_K_TEXTSTART | STB_TEXTEDIT_K_SHIFT:
          stb_textedit_prep_selection_at_cursor(state);
          state->cursor = state->select_end = 0;
          state->has_preferred_x = 0;
          break;
 
-#ifdef STB_TEXTEDIT_K_TEXTEND2
-      case STB_TEXTEDIT_K_TEXTEND2 | STB_TEXTEDIT_K_SHIFT:
-#endif
       case STB_TEXTEDIT_K_TEXTEND | STB_TEXTEDIT_K_SHIFT:
          stb_textedit_prep_selection_at_cursor(state);
          state->cursor = state->select_end = STB_TEXTEDIT_STRINGLEN(str);
          break;
 
 
-#ifdef STB_TEXTEDIT_K_LINESTART2
-      case STB_TEXTEDIT_K_LINESTART2:
-#endif
       case STB_TEXTEDIT_K_LINESTART: {
          StbFindState find;
          stb_textedit_clamp(str, state);
          break;
       }
 
-#ifdef STB_TEXTEDIT_K_LINEEND2
-      case STB_TEXTEDIT_K_LINEEND2:
-#endif
       case STB_TEXTEDIT_K_LINEEND: {
          StbFindState find;
          stb_textedit_clamp(str, state);
          break;
       }
 
-#ifdef STB_TEXTEDIT_K_LINESTART2
-      case STB_TEXTEDIT_K_LINESTART2 | STB_TEXTEDIT_K_SHIFT:
-#endif
       case STB_TEXTEDIT_K_LINESTART | STB_TEXTEDIT_K_SHIFT: {
          StbFindState find;
          stb_textedit_clamp(str, state);
          break;
       }
 
-#ifdef STB_TEXTEDIT_K_LINEEND2
-      case STB_TEXTEDIT_K_LINEEND2 | STB_TEXTEDIT_K_SHIFT:
-#endif
       case STB_TEXTEDIT_K_LINEEND | STB_TEXTEDIT_K_SHIFT: {
          StbFindState find;
          stb_textedit_clamp(str, state);
          int n = state->undo_rec[0].insert_length, i;
          // delete n characters from all other records
          state->undo_char_point = state->undo_char_point - (short) n;  // vsnet05
-         memmove(state->undo_char, state->undo_char + n, (size_t) (state->undo_char_point*sizeof(STB_TEXTEDIT_CHARTYPE)));
+         memmove(state->undo_char, state->undo_char + n, (size_t) ((size_t)state->undo_char_point*sizeof(STB_TEXTEDIT_CHARTYPE)));
          for (i=0; i < state->undo_point; ++i)
             if (state->undo_rec[i].char_storage >= 0)
                state->undo_rec[i].char_storage = state->undo_rec[i].char_storage - (short) n; // vsnet05 // @OPTIMIZE: get rid of char_storage and infer it
       }
       --state->undo_point;
-      memmove(state->undo_rec, state->undo_rec+1, (size_t) (state->undo_point*sizeof(state->undo_rec[0])));
+      memmove(state->undo_rec, state->undo_rec+1, (size_t) ((size_t)state->undo_point*sizeof(state->undo_rec[0])));
    }
 }
 
          int n = state->undo_rec[k].insert_length, i;
          // delete n characters from all other records
          state->redo_char_point = state->redo_char_point + (short) n; // vsnet05
-         memmove(state->undo_char + state->redo_char_point, state->undo_char + state->redo_char_point-n, (size_t) ((STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_char_point)*sizeof(STB_TEXTEDIT_CHARTYPE)));
+         memmove(state->undo_char + state->redo_char_point, state->undo_char + state->redo_char_point-n, (size_t) ((size_t)(STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_char_point)*sizeof(STB_TEXTEDIT_CHARTYPE)));
          for (i=state->redo_point; i < k; ++i)
             if (state->undo_rec[i].char_storage >= 0)
                state->undo_rec[i].char_storage = state->undo_rec[i].char_storage + (short) n; // vsnet05
       }
       ++state->redo_point;
-      memmove(state->undo_rec + state->redo_point-1, state->undo_rec + state->redo_point, (size_t) ((STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_point)*sizeof(state->undo_rec[0])));
+      memmove(state->undo_rec + state->redo_point-1, state->undo_rec + state->redo_point, (size_t) ((size_t)(STB_TEXTEDIT_UNDOSTATECOUNT - state->redo_point)*sizeof(state->undo_rec[0])));
    }
 }
 

src/deps/imgui/stb_truetype.h

    typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
    typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
 
+   #ifdef STBTT_STATIC
+   #define STBTT_DEF static
+   #else
+   #define STBTT_DEF extern
+   #endif
+
    // #define your own STBTT_sort() to override this to avoid qsort
    #ifndef STBTT_sort
    #include <stdlib.h>
    float xoff,yoff,xadvance;
 } stbtt_bakedchar;
 
-extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)
+STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)
                                 float pixel_height,                     // height of font in pixels
                                 unsigned char *pixels, int pw, int ph,  // bitmap to be filled in
                                 int first_char, int num_chars,          // characters to bake
    float x1,y1,s1,t1; // bottom-right
 } stbtt_aligned_quad;
 
-extern void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph,  // same data as above
+STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph,  // same data as above
                                int char_index,             // character to display
                                float *xpos, float *ypos,   // pointers to current position in screen pixel space
                                stbtt_aligned_quad *q,      // output: quad to draw
 
 typedef struct stbtt_pack_context stbtt_pack_context;
 typedef struct stbtt_fontinfo stbtt_fontinfo;
+#ifndef STB_RECT_PACK_VERSION
+typedef struct stbrp_rect stbrp_rect;
+#endif
 
-extern int  stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);
+STBTT_DEF int  stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);
 // Initializes a packing context stored in the passed-in stbtt_pack_context.
 // Future calls using this context will pack characters into the bitmap passed
 // in here: a 1-channel bitmap that is weight x height. stride_in_bytes is
 //
 // Returns 0 on failure, 1 on success.
 
-extern void stbtt_PackEnd  (stbtt_pack_context *spc);
+STBTT_DEF void stbtt_PackEnd  (stbtt_pack_context *spc);
 // Cleans up the packing context and frees all memory.
 
 #define STBTT_POINT_SIZE(x)   (-(x))
 
-extern int  stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
+STBTT_DEF int  stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
                                 int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range);
 // Creates character bitmaps from the font_index'th font found in fontdata (use
 // font_index=0 if you don't know what that is). It creates num_chars_in_range
    stbtt_packedchar *chardata_for_range; // output
 } stbtt_pack_range;
 
-extern int  stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);
+STBTT_DEF int  stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);
 // Creates character bitmaps from multiple ranges of characters stored in
 // ranges. This will usually create a better-packed bitmap than multiple
 // calls to stbtt_PackFontRange.
 
-extern int  stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
-extern int  stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
+STBTT_DEF int  stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
+STBTT_DEF int  stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
 // Those functions are called by stbtt_PackFontRanges(). If you want to
 // pack multiple fonts or custom data into a same texture, you may copy
 // the contents of stbtt_PackFontRanges() and create a custom version 
 // using those functions.
 
-extern void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);
+STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);
 // Oversampling a font increases the quality by allowing higher-quality subpixel
 // positioning, and is especially valuable at smaller text sizes.
 //
 // oversampled textures with bilinear filtering. Look at the readme in
 // stb/tests/oversample for information about oversampled fonts
 
-extern void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph,  // same data as above
+STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph,  // same data as above
                                int char_index,             // character to display
                                float *xpos, float *ypos,   // pointers to current position in screen pixel space
                                stbtt_aligned_quad *q,      // output: quad to draw
 //
 //
 
-extern int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
+STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
 // Each .ttf/.ttc file may have more than one font. Each font has a sequential
 // index number starting from 0. Call this function to get the font offset for
 // a given index; it returns -1 if the index is out of range. A regular .ttf
    int indexToLocFormat;              // format needed to map from glyph index to glyph
 } stbtt_fontinfo;
 
-extern int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
+STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
 // Given an offset into the file that defines a font, this function builds
 // the necessary cached info for the rest of the system. You must allocate
 // the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't
 //
 // CHARACTER TO GLYPH-INDEX CONVERSIOn
 
-int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);
+STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);
 // If you're going to perform multiple operations on the same character
 // and you want a speed-up, call this function with the character you're
 // going to process, then use glyph-based functions instead of the
 // CHARACTER PROPERTIES
 //
 
-extern float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);
+STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);
 // computes a scale factor to produce a font whose "height" is 'pixels' tall.
 // Height is measured as the distance from the highest ascender to the lowest
 // descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics
 //       scale = pixels / (ascent - descent)
 // so if you prefer to measure height by the ascent only, use a similar calculation.
 
-extern float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);
+STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);
 // computes a scale factor to produce a font whose EM size is mapped to
 // 'pixels' tall. This is probably what traditional APIs compute, but
 // I'm not positive.
 
-extern void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);
+STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);
 // ascent is the coordinate above the baseline the font extends; descent
 // is the coordinate below the baseline the font extends (i.e. it is typically negative)
 // lineGap is the spacing between one row's descent and the next row's ascent...
 //   these are expressed in unscaled coordinates, so you must multiply by
 //   the scale factor for a given size
 
-extern void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);
+STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);
 // the bounding box around all possible characters
 
-extern void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);
+STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);
 // leftSideBearing is the offset from the current horizontal position to the left edge of the character
 // advanceWidth is the offset from the current horizontal position to the next horizontal position
 //   these are expressed in unscaled coordinates
 
-extern int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);
+STBTT_DEF int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);
 // an additional amount to add to the 'advance' value between ch1 and ch2
 
-extern int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);
+STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);
 // Gets the bounding box of the visible part of the glyph, in unscaled coordinates
 
-extern void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);
-extern int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);
-extern int  stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
+STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);
+STBTT_DEF int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);
+STBTT_DEF int  stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
 // as above, but takes one or more glyph indices for greater efficiency
 
 
    } stbtt_vertex;
 #endif
 
-extern int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);
+STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);
 // returns non-zero if nothing is drawn for this glyph
 
-extern int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);
-extern int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);
+STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);
+STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);
 // returns # of vertices and fills *vertices with the pointer to them
 //   these are expressed in "unscaled" coordinates
 //
 // draws a quadratic bezier from previous endpoint to
 // its x,y, using cx,cy as the bezier control point.
 
-extern void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
+STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
 // frees the data allocated above
 
 //////////////////////////////////////////////////////////////////////////////
 // BITMAP RENDERING
 //
 
-extern void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);
+STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);
 // frees the bitmap allocated below
 
-extern unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
 // allocates a large-enough single-channel 8bpp bitmap and renders the
 // specified character/glyph at the specified scale into it, with
 // antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque).
 //
 // xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap
 
-extern unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
 // the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel
 // shift for the character
 
-extern void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);
+STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);
 // the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap
 // in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap
 // is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the
 // width and height and positioning info for it first.
 
-extern void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint);
+STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint);
 // same as stbtt_MakeCodepointBitmap, but you can specify a subpixel
 // shift for the character
 
-extern void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
+STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
 // get the bbox of the bitmap centered around the glyph origin; so the
 // bitmap width is ix1-ix0, height is iy1-iy0, and location to place
 // the bitmap top left is (leftSideBearing*scale,iy0).
 // (Note that the bitmap uses y-increases-down, but the shape uses
 // y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.)
 
-extern void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
+STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
 // same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel
 // shift for the character
 
 // the following functions are equivalent to the above functions, but operate
 // on glyph indices instead of Unicode codepoints (for efficiency)
-extern unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);
-extern unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff);
-extern void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph);
-extern void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph);
-extern void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
-extern void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff);
+STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph);
+STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph);
+STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
+STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
 
 
 // @TODO: don't expose this structure
    unsigned char *pixels;
 } stbtt__bitmap;
 
-extern void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata);
+STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata);
 
 //////////////////////////////////////////////////////////////////////////////
 //
 //             You have to have called stbtt_InitFont() first.
 
 
-extern int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);
+STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);
 // returns the offset (not index) of the font that matches, or -1 if none
 //   if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold".
 //   if you use any other flag, use a font name like "Arial"; this checks
 #define STBTT_MACSTYLE_UNDERSCORE   4
 #define STBTT_MACSTYLE_NONE         8   // <= not same as 0, this makes us check the bitfield is 0
 
-extern int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);
+STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);
 // returns 1/0 whether the first string interpreted as utf8 is identical to
 // the second string interpreted as big-endian utf16... useful for strings from next func
 
-extern const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);
+STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);
 // returns the string (which may be big-endian double byte, e.g. for unicode)
 // and puts the length in bytes in *length.
 //
 
 #else
 
-   stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
-   stbtt_int16 ttSHORT(const stbtt_uint8 *p)   { return p[0]*256 + p[1]; }
-   stbtt_uint32 ttULONG(const stbtt_uint8 *p)  { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
-   stbtt_int32 ttLONG(const stbtt_uint8 *p)    { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
+   static stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
+   static stbtt_int16 ttSHORT(const stbtt_uint8 *p)   { return p[0]*256 + p[1]; }
+   static stbtt_uint32 ttULONG(const stbtt_uint8 *p)  { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
+   static stbtt_int32 ttLONG(const stbtt_uint8 *p)    { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
 
 #endif
 
    return 0;
 }
 
-int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index)
+STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index)
 {
    // if it's just a font, there's only one valid index
    if (stbtt__isfont(font_collection))
    return -1;
 }
 
-int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart)
+STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart)
 {
    stbtt_uint8 *data = (stbtt_uint8 *) data2;
    stbtt_uint32 cmap, t;
    return 1;
 }
 
-int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)
+STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)
 {
    stbtt_uint8 *data = info->data;
    stbtt_uint32 index_map = info->index_map;
    return 0;
 }
 
-int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)
+STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)
 {
    return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices);
 }
    return g1==g2 ? -1 : g1; // if length is 0, return -1
 }
 
-int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
+STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
 {
    int g = stbtt__GetGlyfOffset(info, glyph_index);
    if (g < 0) return 0;
    return 1;
 }
 
-int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1)
+STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1)
 {
    return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1);
 }
 
-int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
+STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
 {
    stbtt_int16 numberOfContours;
    int g = stbtt__GetGlyfOffset(info, glyph_index);
    return num_vertices;
 }
 
-int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
+STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
 {
    stbtt_int16 numberOfContours;
    stbtt_uint8 *endPtsOfContours;
    return num_vertices;
 }
 
-void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
+STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
 {
    stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34);
    if (glyph_index < numOfLongHorMetrics) {
    }
 }
 
-int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
+STBTT_DEF int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
 {
    stbtt_uint8 *data = info->data + info->kern;
    stbtt_uint32 needle, straw;
    return 0;
 }
 
-int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2)
+STBTT_DEF int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2)
 {
    if (!info->kern) // if no kerning table, don't waste time looking up both codepoint->glyphs
       return 0;
    return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2));
 }
 
-void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing)
+STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing)
 {
    stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing);
 }
 
-void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap)
+STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap)
 {
    if (ascent ) *ascent  = ttSHORT(info->data+info->hhea + 4);
    if (descent) *descent = ttSHORT(info->data+info->hhea + 6);
    if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8);
 }
 
-void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1)
+STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1)
 {
    *x0 = ttSHORT(info->data + info->head + 36);
    *y0 = ttSHORT(info->data + info->head + 38);
    *y1 = ttSHORT(info->data + info->head + 42);
 }
 
-float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height)
+STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height)
 {
    int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6);
    return (float) height / fheight;
 }
 
-float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels)
+STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels)
 {
    int unitsPerEm = ttUSHORT(info->data + info->head + 18);
    return pixels / unitsPerEm;
 }
 
-void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
+STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
 {
    STBTT_free(v, info->userdata);
 }
 // antialiasing software rasterizer
 //
 
-void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
+STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
 {
    int x0,y0,x1,y1;
    if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) {
    }
 }
 
-void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
+STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
 {
    stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1);
 }
 
-void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
+STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
 {
    stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1);
 }
 
-void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
+STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
 {
    stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1);
 }
 }
 
 // returns number of contours
-stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
+static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
 {
    stbtt__point *points=0;
    int num_points=0;
    return NULL;
 }
 
-void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata)
+STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata)
 {
    float scale = scale_x > scale_y ? scale_y : scale_x;
    int winding_count, *winding_lengths;
    }
 }
 
-void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata)
+STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata)
 {
    STBTT_free(bitmap, userdata);
 }
 
-unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff)
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff)
 {
    int ix0,iy0,ix1,iy1;
    stbtt__bitmap gbm;
    return gbm.pixels;
 }   
 
-unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff)
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff)
 {
    return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff);
 }
 
-void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph)
+STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph)
 {
    int ix0,iy0;
    stbtt_vertex *vertices;
    STBTT_free(vertices, info->userdata);
 }
 
-void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph)
+STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph)
 {
    stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph);
 }
 
-unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
 {
    return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff);
 }   
 
-void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint)
+STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint)
 {
    stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint));
 }
 
-unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
 {
    return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff);
 }   
 
-void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint)
+STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint)
 {
    stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint);
 }
 //
 // This is SUPER-CRAPPY packing to keep source code small
 
-extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)
+STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)
                                 float pixel_height,                     // height of font in pixels
                                 unsigned char *pixels, int pw, int ph,  // bitmap to be filled in
                                 int first_char, int num_chars,          // characters to bake
    return bottom_y;
 }
 
-void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule)
+STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule)
 {
    float d3d_bias = opengl_fillrule ? 0 : -0.5f;
    float ipw = 1.0f / pw, iph = 1.0f / ph;
    unsigned char x;
 } stbrp_node;
 
-typedef struct
+struct stbrp_rect
 {
    stbrp_coord x,y;
    int id,w,h,was_packed;
-} stbrp_rect;
+};
 
 static void stbrp_init_target(stbrp_context *con, int pw, int ph, stbrp_node *nodes, int num_nodes)
 {
 // This is SUPER-AWESOME (tm Ryan Gordon) packing using stb_rect_pack.h. If
 // stb_rect_pack.h isn't available, it uses the BakeFontBitmap strategy.
 
-int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context)
+STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context)
 {
    stbrp_context *context = (stbrp_context *) STBTT_malloc(sizeof(*context)            ,alloc_context);
    int            num_nodes = pw - padding;
    return 1;
 }
 
-void stbtt_PackEnd  (stbtt_pack_context *spc)
+STBTT_DEF void stbtt_PackEnd  (stbtt_pack_context *spc)
 {
    STBTT_free(spc->nodes    , spc->user_allocator_context);
    STBTT_free(spc->pack_info, spc->user_allocator_context);
 }
 
-void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample)
+STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample)
 {
    STBTT_assert(h_oversample <= STBTT_MAX_OVERSAMPLE);
    STBTT_assert(v_oversample <= STBTT_MAX_OVERSAMPLE);
 }
 
 // rects array must be big enough to accommodate all characters in the given ranges
-int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
+STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
 {
    int i,j,k;
 
 }
 
 // rects array must be big enough to accommodate all characters in the given ranges
-int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
+STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
 {
    float recip_h = 1.0f / spc->h_oversample;
    float recip_v = 1.0f / spc->v_oversample;
    return return_value;
 }
 
-int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
+STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
 {
    stbtt_fontinfo info;
    int i,j,n, return_value = 1;
    return return_value;
 }
 
-int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
+STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
             int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range)
 {
    stbtt_pack_range range;
    return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1);
 }
 
-void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer)
+STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer)
 {
    float ipw = 1.0f / pw, iph = 1.0f / ph;
    stbtt_packedchar *b = chardata + char_index;
    return i;
 }
 
-int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2) 
+STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2) 
 {
    return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((const stbtt_uint8*) s1, len1, (const stbtt_uint8*) s2, len2);
 }
 
 // returns results in whatever encoding you request... but note that 2-byte encodings
 // will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare
-const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID)
+STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID)
 {
    stbtt_int32 i,count,stringOffset;
    stbtt_uint8 *fc = font->data;
    return 0;
 }
 
-int stbtt_FindMatchingFont(const unsigned char *font_collection, const char *name_utf8, stbtt_int32 flags)
+STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *font_collection, const char *name_utf8, stbtt_int32 flags)
 {
    stbtt_int32 i;
    for (i=0;;++i) {

src/deps/stb/stb.cpp

 #define STBRP_ASSERT assert
 #include "stb/stb_rect_pack.h"
 
-//! \TODO bring back when imgui allows it
-//#define STB_TRUETYPE_IMPLEMENTATION
-//#define STBTT_assert(x) assert(x)
-//#include "stb/stb_truetype.h"
+#define STB_TRUETYPE_IMPLEMENTATION
+#define STBTT_assert(x) assert(x)
+#include "stb/stb_truetype.h"