Merge branch 'master' of github.com:bkaradzic/bgfx

3rdparty/ocornut-imgui/imgui.cpp

@@ -250,6 +250,7 @@
  Here is a change-log of API breaking changes, if you are using one of the functions listed, expect to have to fix some code.
  Also read releases logs https://github.com/ocornut/imgui/releases for more details.
 
+ - 2018/02/18 (1.60) - BeginDragDropSource(): temporarily removed the optional mouse_button=0 parameter because it is really usable in typical conditions at the moment. 
  - 2018/02/16 (1.60) - obsoleted the io.RenderDrawListsFn callback, you can call your graphics engine render function after ImGui::Render(). Use ImGui::GetDrawData() to retrieve the ImDrawData* to display.
  - 2018/02/07 (1.60) - reorganized context handling to be more explicit,
                        - YOU NOW NEED TO CALL ImGui::CreateContext() AT THE BEGINNING OF YOUR APP, AND CALL ImGui::DestroyContext() AT THE END.
@@ -257,6 +258,7 @@
                        - you may pass a ImFontAtlas* pointer to CreateContext() to share a font atlas between contexts. Otherwhise CreateContext() will create its own font atlas instance.
                        - removed allocator parameters from CreateContext(), they are now setup with SetAllocatorFunctions(), and shared by all contexts.
                        - removed the default global context and font atlas instance, which were confusing for users of DLL reloading and users of multiple contexts.
+ - 2018/01/31 (1.60) - moved sample TTF files from extra_fonts/ to misc/fonts/. If you loaded files directly from the imgui repo you may need to update your paths.
  - 2018/01/11 (1.60) - obsoleted IsAnyWindowHovered() in favor of IsWindowHovered(ImGuiHoveredFlags_AnyWindow). Kept redirection function (will obsolete).
  - 2018/01/11 (1.60) - obsoleted IsAnyWindowFocused() in favor of IsWindowFocused(ImGuiFocusedFlags_AnyWindow). Kept redirection function (will obsolete).
  - 2018/01/03 (1.60) - renamed ImGuiSizeConstraintCallback to ImGuiSizeCallback, ImGuiSizeConstraintCallbackData to ImGuiSizeCallbackData.
@@ -547,11 +549,15 @@
 
  Q: How can I load a different font than the default? (default is an embedded version of ProggyClean.ttf, rendered at size 13)
  A: Use the font atlas to load the TTF/OTF file you want:
-
       ImGuiIO& io = ImGui::GetIO();
       io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels);
       io.Fonts->GetTexDataAsRGBA32() or GetTexDataAsAlpha8()
 
+    New programmers: remember that in C/C++ and most programming languages if you want to use a backslash \ in a string literal you need to write a double backslash "\\":
+      io.Fonts->AddFontFromFileTTF("MyDataFolder\MyFontFile.ttf", size_in_pixels);   // WRONG
+      io.Fonts->AddFontFromFileTTF("MyDataFolder\\MyFontFile.ttf", size_in_pixels);  // CORRECT
+      io.Fonts->AddFontFromFileTTF("MyDataFolder/MyFontFile.ttf", size_in_pixels);   // ALSO CORRECT
+
  Q: How can I easily use icons in my application?
  A: The most convenient and practical way is to merge an icon font such as FontAwesome inside you main font. Then you can refer to icons within your 
     strings. Read 'How can I load multiple fonts?' and the file 'misc/fonts/README.txt' for instructions and useful header files.
@@ -948,14 +954,13 @@ ImVec2 ImLineClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& p)
 {
     ImVec2 ap = p - a;
     ImVec2 ab_dir = b - a;
-    float ab_len = sqrtf(ab_dir.x * ab_dir.x + ab_dir.y * ab_dir.y);
-    ab_dir *= 1.0f / ab_len;
     float dot = ap.x * ab_dir.x + ap.y * ab_dir.y;
     if (dot < 0.0f)
         return a;
-    if (dot > ab_len)
+    float ab_len_sqr = ab_dir.x * ab_dir.x + ab_dir.y * ab_dir.y;
+    if (dot > ab_len_sqr)
         return b;
-    return a + ab_dir * dot;
+    return a + ab_dir * dot / ab_len_sqr;
 }
 
 bool ImTriangleContainsPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p)
@@ -2346,7 +2351,7 @@ static bool NavMoveRequestButNoResultYet()
     return g.NavMoveRequest && g.NavMoveResultLocal.ID == 0 && g.NavMoveResultOther.ID == 0;
 }
 
-static void NavMoveRequestCancel()
+void ImGui::NavMoveRequestCancel()
 {
     ImGuiContext& g = *GImGui;
     g.NavMoveRequest = false;
@@ -5003,7 +5008,7 @@ static void NavProcessMoveRequestWrapAround(ImGuiWindow* window)
         if ((g.NavMoveDir == ImGuiDir_Up || g.NavMoveDir == ImGuiDir_Down) && g.NavMoveRequestForward == ImGuiNavForward_None && g.NavLayer == 0)
         {
             g.NavMoveRequestForward = ImGuiNavForward_ForwardQueued;
-            NavMoveRequestCancel();
+            ImGui::NavMoveRequestCancel();
             g.NavWindow->NavRectRel[0].Min.y = g.NavWindow->NavRectRel[0].Max.y = ((g.NavMoveDir == ImGuiDir_Up) ? ImMax(window->SizeFull.y, window->SizeContents.y) : 0.0f) - window->Scroll.y;
         }
 }
@@ -12743,7 +12748,7 @@ void ImGui::ClearDragDrop()
 
 // Call when current ID is active. 
 // When this returns true you need to: a) call SetDragDropPayload() exactly once, b) you may render the payload visual/description, c) call EndDragDropSource()
-bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags, int mouse_button)
+bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
@@ -12751,6 +12756,7 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags, int mouse_button)
     bool source_drag_active = false;
     ImGuiID source_id = 0;
     ImGuiID source_parent_id = 0;
+    int mouse_button = 0;
     if (!(flags & ImGuiDragDropFlags_SourceExtern))
     {
         source_id = window->DC.LastItemId;

3rdparty/ocornut-imgui/imgui.h

@@ -452,7 +452,7 @@ namespace ImGui
 
     // Drag and Drop
     // [BETA API] Missing Demo code. API may evolve.
-    IMGUI_API bool          BeginDragDropSource(ImGuiDragDropFlags flags = 0, int mouse_button = 0);                // call when the current item is active. If this return true, you can call SetDragDropPayload() + EndDragDropSource()
+    IMGUI_API bool          BeginDragDropSource(ImGuiDragDropFlags flags = 0);                                      // call when the current item is active. If this return true, you can call SetDragDropPayload() + EndDragDropSource()
     IMGUI_API bool          SetDragDropPayload(const char* type, const void* data, size_t size, ImGuiCond cond = 0);// type is a user defined string of maximum 12 characters. Strings starting with '_' are reserved for dear imgui internal types. Data is copied and held by imgui.
     IMGUI_API void          EndDragDropSource();                                                                    // only call EndDragDropSource() if BeginDragDropSource() returns true!
     IMGUI_API bool          BeginDragDropTarget();                                                                  // call after submitting an item that may receive an item. If this returns true, you can call AcceptDragDropPayload() + EndDragDropTarget()
@@ -1508,7 +1508,7 @@ struct ImDrawList
     IMGUI_API void  PushClipRect(ImVec2 clip_rect_min, ImVec2 clip_rect_max, bool intersect_with_current_clip_rect = false);  // Render-level scissoring. This is passed down to your render function but not used for CPU-side coarse clipping. Prefer using higher-level ImGui::PushClipRect() to affect logic (hit-testing and widget culling)
     IMGUI_API void  PushClipRectFullScreen();
     IMGUI_API void  PopClipRect();
-    IMGUI_API void  PushTextureID(const ImTextureID& texture_id);
+    IMGUI_API void  PushTextureID(ImTextureID texture_id);
     IMGUI_API void  PopTextureID();
     inline ImVec2   GetClipRectMin() const { const ImVec4& cr = _ClipRectStack.back(); return ImVec2(cr.x, cr.y); }
     inline ImVec2   GetClipRectMax() const { const ImVec4& cr = _ClipRectStack.back(); return ImVec2(cr.z, cr.w); }

3rdparty/ocornut-imgui/imgui_draw.cpp

@@ -451,7 +451,7 @@ void ImDrawList::PopClipRect()
     UpdateClipRect();
 }
 
-void ImDrawList::PushTextureID(const ImTextureID& texture_id)
+void ImDrawList::PushTextureID(ImTextureID texture_id)
 {
     _TextureIdStack.push_back(texture_id);
     UpdateTextureID();

3rdparty/ocornut-imgui/imgui_internal.h

@@ -1066,6 +1066,7 @@ namespace ImGui
     IMGUI_API void          BeginTooltipEx(ImGuiWindowFlags extra_flags, bool override_previous_tooltip = true);
 
     IMGUI_API void          NavInitWindow(ImGuiWindow* window, bool force_reinit);
+    IMGUI_API void          NavMoveRequestCancel();
     IMGUI_API void          ActivateItem(ImGuiID id);   // Remotely activate a button, checkbox, tree node etc. given its unique ID. activation is queued and processed on the next frame when the item is encountered again.
 
     IMGUI_API float         GetNavInputAmount(ImGuiNavInput n, ImGuiInputReadMode mode);