Merge branch 'master' into viewport

# Conflicts:
#	docs/CHANGELOG.txt
#	examples/imgui_impl_win32.cpp
#	imgui_demo.cpp

.editorconfig

@@ -0,0 +1,17 @@
+# editorconfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Default settings:
+# Use 4 spaces as indentation
+[*]
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Makefile
+[Makefile]
+indent_style = tab
+indent_size = 4

docs/CHANGELOG.txt

@@ -30,6 +30,7 @@ HOW TO UPDATE?
 
 
 -----------------------------------------------------------------------
+<<<<<<< HEAD
  VIEWPORT BRANCH (In Progress)
 -----------------------------------------------------------------------
 
@@ -71,12 +72,20 @@ Other changes:
 
 -----------------------------------------------------------------------
  VERSION 1.68
+=======
+ VERSION 1.68 (In progress)
+>>>>>>> master
 -----------------------------------------------------------------------
 
 Other Changes:
-- Examples: Win32: Using GetForegroundWindow() instead of GetActiveWindow() to be compatible with windows created 
+- Added .editorconfig file for text editors to standardize using spaces. (#2038) [@kudaba]
-  in a different thread. (#1951, #2087, #2156, #2232) [many people]
+- ImDrawList: Fixed AddCircle(), AddCircleFilled() angle step being off, which was visible when drawing a "circle"
+  with a small number of segments (e.g. an hexagon). (#2287) [@baktery]
+- Fonts: imgui_freetype: Added support for imgui allocators + custom FreeType only SetAllocatorFunctions. (#2285) [@Vuhdo]
+- Examples: Win32: Using GetForegroundWindow()+IsChild() instead of GetActiveWindow() to be compatible with windows created 
+  in a different thread or parent. (#1951, #2087, #2156, #2232) [many people]
 - Examples: Win32: Added support for XInput games (if ImGuiConfigFlags_NavEnableGamepad is enabled).
+- Examples: DirectX9: Explicitly disable fog (D3DRS_FOGENABLE) before drawing in case user state has it set. (#2288, #2230)
 
 
 -----------------------------------------------------------------------

docs/TODO.txt

@@ -38,7 +38,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - drawlist: maintaining bounding box per command would allow to merge draw command when clipping isn't relied on (typical non-scrolling window or non-overflowing column would merge with previous command).
  - drawlist: primitives/helpers to manipulate vertices post submission, so e.g. a quad/rect can be resized to fit later submitted content, _without_ using the ChannelSplit api
  - drawlist: make it easier to toggle AA per primitive, so we can use e.g. non-AA fill + AA borders more naturally
- - drawlist: non-AA strokes have gaps between points (#593, #288), especially RenderCheckmark().
+ - drawlist: non-AA strokes have gaps between points (#593, #288), glitch especially on RenderCheckmark() and ColorPicker4().
  - drawlist: would be good to be able to deep copy of ImDrawData (we have a deep copy of ImDrawList now).
  - drawlist: rendering: provide a way for imgui to output to a single/global vertex buffer, re-order indices only at the end of the frame (ref: https://gist.github.com/floooh/10388a0afbe08fce9e617d8aefa7d302)
  - drawlist: callback: add an extra void* in ImDrawCallback to allow passing render-local data to the callback (would break API).

examples/example_win32_directx12/example_win32_directx12.vcxproj

@@ -21,7 +21,7 @@
   <PropertyGroup Label="Globals">
     <ProjectGuid>{b4cf9797-519d-4afe-a8f4-5141a6b521d3}</ProjectGuid>
     <RootNamespace>example_win32_directx12</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.16299.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">

examples/imgui_impl_dx9.cpp

@@ -10,6 +10,7 @@
 
 // CHANGELOG 
 // (minor and older changes stripped away, please see git history for details)
+//  2019-01-16: Misc: Disabled fog before drawing UI's. Fixes issue #2288.
 //  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
 //  2018-06-08: Misc: Extracted imgui_impl_dx9.cpp/.h away from the old combined DX9+Win32 example.
 //  2018-06-08: DirectX9: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
@@ -131,6 +132,7 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
     g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
     g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, true);
     g_pd3dDevice->SetRenderState(D3DRS_SHADEMODE, D3DSHADE_GOURAUD);
+    g_pd3dDevice->SetRenderState(D3DRS_FOGENABLE, false);
     g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
     g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
     g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);

examples/imgui_impl_win32.cpp

@@ -20,7 +20,7 @@
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2018-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
-//  2019-01-15: Inputs: Using GetForegroundWindow() instead of GetActiveWindow() to be compatible with windows created in a different thread.
+//  2019-01-17: Inputs: Using GetForegroundWindow()+IsChild() instead of GetActiveWindow() to be compatible with windows created in a different thread or parent.
 //  2019-01-15: Inputs: Added support for XInput gamepads (if ImGuiConfigFlags_NavEnableGamepad is set by user application).
 //  2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
 //  2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor.
@@ -164,6 +164,8 @@ static void ImGui_ImplWin32_UpdateMousePos()
         return;
     if (HWND focused_hwnd = ::GetForegroundWindow())
     {
+        if (::IsChild(focused_hwnd, g_hWnd))
+            focused_hwnd = g_hWnd;
         if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
         {
             // Multi-viewport mode: mouse position in OS absolute coordinates (io.MousePos is (0,0) when the mouse is on the upper-left of the primary monitor)
@@ -194,6 +196,14 @@ static void ImGui_ImplWin32_UpdateMousePos()
         if (ImGuiViewport* viewport = ImGui::FindViewportByPlatformHandle((void*)hovered_hwnd))
             if ((viewport->Flags & ImGuiViewportFlags_NoInputs) == 0) // FIXME: We still get our NoInputs window with WM_NCHITTEST/HTTRANSPARENT code when decorated?
                 io.MouseHoveredViewport = viewport->ID;
+
+#if 0
+    POINT pos;
+    if (HWND active_window = ::GetForegroundWindow())
+        if (active_window == g_hWnd || ::IsChild(active_window, g_hWnd))
+            if (::GetCursorPos(&pos) && ::ScreenToClient(g_hWnd, &pos))
+                io.MousePos = ImVec2((float)pos.x, (float)pos.y);
+#endif
 }
 
 #ifdef _MSC_VER

imgui.cpp

@@ -2986,7 +2986,7 @@ bool ImGui::DebugCheckVersionAndDataLayout(const char* version, size_t sz_io, si
     return !error;
 }
 
-void ImGui::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void(*free_func)(void* ptr, void* user_data), void* user_data)
+void ImGui::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data)
 {
     GImAllocatorAllocFunc = alloc_func;
     GImAllocatorFreeFunc = free_func;
@@ -5438,7 +5438,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
             // Title bar
             if (!(flags & ImGuiWindowFlags_NoTitleBar))
             {
-                ImU32 title_bar_col = GetColorU32(window->Collapsed ? ImGuiCol_TitleBgCollapsed : title_bar_is_highlight ? ImGuiCol_TitleBgActive : ImGuiCol_TitleBg);
+                ImU32 title_bar_col = GetColorU32(title_bar_is_highlight ? ImGuiCol_TitleBgActive : ImGuiCol_TitleBg);
                 window->DrawList->AddRectFilled(title_bar_rect.Min, title_bar_rect.Max, title_bar_col, window_rounding, ImDrawCornerFlags_Top);
             }
 
@@ -8601,6 +8601,7 @@ static void ImGui::NavUpdate()
     NavUpdateWindowing();
 
     // Set output flags for user application
+    // FIXME: g.NavInitRequest is always false at this point, investigate the intent of operation done here.
     g.IO.NavActive = (nav_keyboard_active || nav_gamepad_active) && g.NavWindow && !(g.NavWindow->Flags & ImGuiWindowFlags_NoNavInputs);
     g.IO.NavVisible = (g.IO.NavActive && g.NavId != 0 && !g.NavDisableHighlight) || (g.NavWindowingTarget != NULL) || g.NavInitRequest;
 
@@ -8836,7 +8837,7 @@ static float ImGui::NavUpdatePageUpPageDown(int allowed_dir_flags)
         ImGuiWindow* window = g.NavWindow;
         bool page_up_held = IsKeyDown(g.IO.KeyMap[ImGuiKey_PageUp]) && (allowed_dir_flags & (1 << ImGuiDir_Up));
         bool page_down_held = IsKeyDown(g.IO.KeyMap[ImGuiKey_PageDown]) && (allowed_dir_flags & (1 << ImGuiDir_Down));
-        if ((page_up_held && !page_down_held) || (page_down_held && !page_up_held))
+        if (page_up_held != page_down_held) // If either (not both) are pressed
         {
             if (window->DC.NavLayerActiveMask == 0x00 && window->DC.NavHasScroll)
             {
@@ -9513,7 +9514,7 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags)
             // Target can request the Source to not display its tooltip (we use a dedicated flag to make this request explicit)
             // We unfortunately can't just modify the source flags and skip the call to BeginTooltip, as caller may be emitting contents. 
             BeginTooltip();
-            if (g.DragDropActive && g.DragDropAcceptIdPrev && (g.DragDropAcceptFlags & ImGuiDragDropFlags_AcceptNoPreviewTooltip))
+            if (g.DragDropAcceptIdPrev && (g.DragDropAcceptFlags & ImGuiDragDropFlags_AcceptNoPreviewTooltip))
             {
                 ImGuiWindow* tooltip_window = g.CurrentWindow;
                 tooltip_window->SkipItems = true;

imgui.h

@@ -683,7 +683,7 @@ namespace ImGui
     // Memory Utilities
     // - All those functions are not reliant on the current context.
     // - If you reload the contents of imgui.cpp at runtime, you may need to call SetCurrentContext() + SetAllocatorFunctions() again.
-    IMGUI_API void          SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void(*free_func)(void* ptr, void* user_data), void* user_data = NULL);
+    IMGUI_API void          SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
     IMGUI_API void*         MemAlloc(size_t size);
     IMGUI_API void          MemFree(void* ptr);
 

imgui_demo.cpp

@@ -892,17 +892,18 @@ static void ShowDemoWindowWidgets()
         }
         if (ImGui::TreeNode("Grid"))
         {
-            static bool selected[16] = { true, false, false, false, false, true, false, false, false, false, true, false, false, false, false, true };
+            static bool selected[4*4] = { true, false, false, false, false, true, false, false, false, false, true, false, false, false, false, true };
-            for (int i = 0; i < 16; i++)
+            for (int i = 0; i < 4*4; i++)
             {
                 ImGui::PushID(i);
                 if (ImGui::Selectable("Sailor", &selected[i], 0, ImVec2(50,50)))
                 {
-                    int x = i % 4, y = i / 4;
+                    int x = i % 4;
-                    if (x > 0) selected[i - 1] ^= 1;
+                    int y = i / 4;
-                    if (x < 3) selected[i + 1] ^= 1;
+                    if (x > 0) { selected[i - 1] ^= 1; }
-                    if (y > 0) selected[i - 4] ^= 1;
+                    if (x < 3) { selected[i + 1] ^= 1; }
-                    if (y < 3) selected[i + 4] ^= 1;
+                    if (y > 0) { selected[i - 4] ^= 1; }
+                    if (y < 3) { selected[i + 4] ^= 1; }
                 }
                 if ((i % 4) < 3) ImGui::SameLine();
                 ImGui::PopID();
@@ -968,7 +969,7 @@ static void ShowDemoWindowWidgets()
         static float values[90] = { 0 };
         static int values_offset = 0;
         static double refresh_time = 0.0;
-        if (!animate || refresh_time == 0.0f)
+        if (!animate || refresh_time == 0.0)
             refresh_time = ImGui::GetTime();
         while (refresh_time < ImGui::GetTime()) // Create dummy data at fixed 60 hz rate for the demo
         {
@@ -1996,9 +1997,9 @@ static void ShowDemoWindowLayout()
         ImGui::EndChild();
         ImGui::PopStyleVar(2);
         float scroll_x_delta = 0.0f;
-        ImGui::SmallButton("<<"); if (ImGui::IsItemActive()) scroll_x_delta = -ImGui::GetIO().DeltaTime * 1000.0f; ImGui::SameLine();
+        ImGui::SmallButton("<<"); if (ImGui::IsItemActive()) { scroll_x_delta = -ImGui::GetIO().DeltaTime * 1000.0f; } ImGui::SameLine();
         ImGui::Text("Scroll from code"); ImGui::SameLine();
-        ImGui::SmallButton(">>"); if (ImGui::IsItemActive()) scroll_x_delta = +ImGui::GetIO().DeltaTime * 1000.0f; ImGui::SameLine();
+        ImGui::SmallButton(">>"); if (ImGui::IsItemActive()) { scroll_x_delta = +ImGui::GetIO().DeltaTime * 1000.0f; } ImGui::SameLine();
         ImGui::Text("%.0f/%.0f", scroll_x, scroll_max_x);
         if (scroll_x_delta != 0.0f)
         {
@@ -2526,9 +2527,9 @@ static void ShowDemoWindowMisc()
             // Use >= 0 parameter to SetKeyboardFocusHere() to focus an upcoming item
             static float f3[3] = { 0.0f, 0.0f, 0.0f };
             int focus_ahead = -1;
-            if (ImGui::Button("Focus on X")) focus_ahead = 0; ImGui::SameLine();
+            if (ImGui::Button("Focus on X")) { focus_ahead = 0; } ImGui::SameLine();
-            if (ImGui::Button("Focus on Y")) focus_ahead = 1; ImGui::SameLine();
+            if (ImGui::Button("Focus on Y")) { focus_ahead = 1; } ImGui::SameLine();
-            if (ImGui::Button("Focus on Z")) focus_ahead = 2;
+            if (ImGui::Button("Focus on Z")) { focus_ahead = 2; }
             if (focus_ahead != -1) ImGui::SetKeyboardFocusHere(focus_ahead);
             ImGui::SliderFloat3("Float3", &f3[0], 0.0f, 1.0f);
 
@@ -3760,8 +3761,8 @@ static void ShowExampleAppConstrainedResize(bool* p_open)
     if (type == 2) ImGui::SetNextWindowSizeConstraints(ImVec2(100, 100), ImVec2(FLT_MAX, FLT_MAX)); // Width > 100, Height > 100
     if (type == 3) ImGui::SetNextWindowSizeConstraints(ImVec2(400, -1),  ImVec2(500, -1));          // Width 400-500
     if (type == 4) ImGui::SetNextWindowSizeConstraints(ImVec2(-1, 400),  ImVec2(-1, 500));          // Height 400-500
-    if (type == 5) ImGui::SetNextWindowSizeConstraints(ImVec2(0, 0),     ImVec2(FLT_MAX, FLT_MAX), CustomConstraints::Square);          // Always Square
+    if (type == 5) ImGui::SetNextWindowSizeConstraints(ImVec2(0, 0),     ImVec2(FLT_MAX, FLT_MAX), CustomConstraints::Square);                     // Always Square
-    if (type == 6) ImGui::SetNextWindowSizeConstraints(ImVec2(0, 0),     ImVec2(FLT_MAX, FLT_MAX), CustomConstraints::Step, (void*)100);// Fixed Step
+    if (type == 6) ImGui::SetNextWindowSizeConstraints(ImVec2(0, 0),     ImVec2(FLT_MAX, FLT_MAX), CustomConstraints::Step, (void*)(intptr_t)100); // Fixed Step
 
     ImGuiWindowFlags flags = auto_resize ? ImGuiWindowFlags_AlwaysAutoResize : 0;
     if (ImGui::Begin("Example: Constrained Resize", p_open, flags))
@@ -3800,6 +3801,7 @@ static void ShowExampleAppSimpleOverlay(bool* p_open)
     // FIXME-VIEWPORT-ABS: Select a default viewport
     const float DISTANCE = 10.0f;
     static int corner = 0;
+    ImGuiIO& io = ImGui::GetIO();
     if (corner != -1)
     {
         ImGuiViewport* viewport = ImGui::GetMainViewport();
@@ -3814,7 +3816,7 @@ static void ShowExampleAppSimpleOverlay(bool* p_open)
         ImGui::Text("Simple overlay\n" "in the corner of the screen.\n" "(right-click to change position)");
         ImGui::Separator();
         if (ImGui::IsMousePosValid())
-            ImGui::Text("Mouse Position: (%.1f,%.1f)", ImGui::GetIO().MousePos.x, ImGui::GetIO().MousePos.y);
+            ImGui::Text("Mouse Position: (%.1f,%.1f)", io.MousePos.x, io.MousePos.y);
         else
             ImGui::Text("Mouse Position: <invalid>");
         if (ImGui::BeginPopupContextWindow())
@@ -3889,27 +3891,30 @@ static void ShowExampleAppCustomRendering(bool* p_open)
     static ImVec4 col = ImVec4(1.0f, 1.0f, 0.4f, 1.0f);
     ImGui::DragFloat("Size", &sz, 0.2f, 2.0f, 72.0f, "%.0f");
     ImGui::DragFloat("Thickness", &thickness, 0.05f, 1.0f, 8.0f, "%.02f");
-    ImGui::ColorEdit3("Color", &col.x);
+    ImGui::ColorEdit4("Color", &col.x);
     {
         const ImVec2 p = ImGui::GetCursorScreenPos();
         const ImU32 col32 = ImColor(col);
         float x = p.x + 4.0f, y = p.y + 4.0f, spacing = 8.0f;
         for (int n = 0; n < 2; n++)
         {
-            float curr_thickness = (n == 0) ? 1.0f : thickness;
+            // First line uses a thickness of 1.0, second line uses the configurable thickness
-            draw_list->AddCircle(ImVec2(x+sz*0.5f, y+sz*0.5f), sz*0.5f, col32, 20, curr_thickness); x += sz+spacing;
+            float th = (n == 0) ? 1.0f : thickness;
-            draw_list->AddRect(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 0.0f, ImDrawCornerFlags_All, curr_thickness); x += sz+spacing;
+            draw_list->AddCircle(ImVec2(x+sz*0.5f, y+sz*0.5f), sz*0.5f, col32, 6, th); x += sz+spacing;     // Hexagon
-            draw_list->AddRect(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 10.0f, ImDrawCornerFlags_All, curr_thickness); x += sz+spacing;
+            draw_list->AddCircle(ImVec2(x+sz*0.5f, y+sz*0.5f), sz*0.5f, col32, 20, th); x += sz+spacing;    // Circle
-            draw_list->AddRect(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 10.0f, ImDrawCornerFlags_TopLeft|ImDrawCornerFlags_BotRight, curr_thickness); x += sz+spacing;
+            draw_list->AddRect(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 0.0f, ImDrawCornerFlags_All, th); x += sz+spacing;
-            draw_list->AddTriangle(ImVec2(x+sz*0.5f, y), ImVec2(x+sz,y+sz-0.5f), ImVec2(x,y+sz-0.5f), col32, curr_thickness); x += sz+spacing;
+            draw_list->AddRect(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 10.0f, ImDrawCornerFlags_All, th); x += sz+spacing;
-            draw_list->AddLine(ImVec2(x, y), ImVec2(x+sz, y   ), col32, curr_thickness); x += sz+spacing;   // Horizontal line (note: drawing a filled rectangle will be faster!)
+            draw_list->AddRect(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 10.0f, ImDrawCornerFlags_TopLeft|ImDrawCornerFlags_BotRight, th); x += sz+spacing;
-            draw_list->AddLine(ImVec2(x, y), ImVec2(x,    y+sz), col32, curr_thickness); x += spacing;      // Vertical line (note: drawing a filled rectangle will be faster!)
+            draw_list->AddTriangle(ImVec2(x+sz*0.5f, y), ImVec2(x+sz,y+sz-0.5f), ImVec2(x,y+sz-0.5f), col32, th); x += sz+spacing;
-            draw_list->AddLine(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, curr_thickness); x += sz+spacing;   // Diagonal line
+            draw_list->AddLine(ImVec2(x, y), ImVec2(x+sz, y   ), col32, th); x += sz+spacing;               // Horizontal line (note: drawing a filled rectangle will be faster!)
-            draw_list->AddBezierCurve(ImVec2(x, y), ImVec2(x+sz*1.3f,y+sz*0.3f), ImVec2(x+sz-sz*1.3f,y+sz-sz*0.3f), ImVec2(x+sz, y+sz), col32, curr_thickness);
+            draw_list->AddLine(ImVec2(x, y), ImVec2(x,    y+sz), col32, th); x += spacing;                  // Vertical line (note: drawing a filled rectangle will be faster!)
+            draw_list->AddLine(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, th); x += sz+spacing;               // Diagonal line
+            draw_list->AddBezierCurve(ImVec2(x, y), ImVec2(x+sz*1.3f,y+sz*0.3f), ImVec2(x+sz-sz*1.3f,y+sz-sz*0.3f), ImVec2(x+sz, y+sz), col32, th);
             x = p.x + 4;
             y += sz+spacing;
         }
-        draw_list->AddCircleFilled(ImVec2(x+sz*0.5f, y+sz*0.5f), sz*0.5f, col32, 32); x += sz+spacing;
+        draw_list->AddCircleFilled(ImVec2(x+sz*0.5f, y+sz*0.5f), sz*0.5f, col32, 6); x += sz+spacing;       // Hexagon
+        draw_list->AddCircleFilled(ImVec2(x+sz*0.5f, y+sz*0.5f), sz*0.5f, col32, 32); x += sz+spacing;      // Circle
         draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x+sz, y+sz), col32); x += sz+spacing;
         draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 10.0f); x += sz+spacing;
         draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x+sz, y+sz), col32, 10.0f, ImDrawCornerFlags_TopLeft|ImDrawCornerFlags_BotRight); x += sz+spacing;

imgui_draw.cpp

@@ -955,6 +955,9 @@ void ImDrawList::PathArcTo(const ImVec2& centre, float radius, float a_min, floa
         _Path.push_back(centre);
         return;
     }
+
+    // Note that we are adding a point at both a_min and a_max. 
+    // If you are trying to draw a full closed circle you don't want the overlapping points!
     _Path.reserve(_Path.Size + (num_segments + 1));
     for (int i = 0; i <= num_segments; i++)
     {
@@ -1138,21 +1141,23 @@ void ImDrawList::AddTriangleFilled(const ImVec2& a, const ImVec2& b, const ImVec
 
 void ImDrawList::AddCircle(const ImVec2& centre, float radius, ImU32 col, int num_segments, float thickness)
 {
-    if ((col & IM_COL32_A_MASK) == 0)
+    if ((col & IM_COL32_A_MASK) == 0 || num_segments <= 2)
         return;
 
+    // Because we are filling a closed shape we remove 1 from the count of segments/points
     const float a_max = IM_PI*2.0f * ((float)num_segments - 1.0f) / (float)num_segments;
-    PathArcTo(centre, radius-0.5f, 0.0f, a_max, num_segments);
+    PathArcTo(centre, radius-0.5f, 0.0f, a_max, num_segments - 1);
     PathStroke(col, true, thickness);
 }
 
 void ImDrawList::AddCircleFilled(const ImVec2& centre, float radius, ImU32 col, int num_segments)
 {
-    if ((col & IM_COL32_A_MASK) == 0)
+    if ((col & IM_COL32_A_MASK) == 0 || num_segments <= 2)
         return;
 
+    // Because we are filling a closed shape we remove 1 from the count of segments/points
     const float a_max = IM_PI*2.0f * ((float)num_segments - 1.0f) / (float)num_segments;
-    PathArcTo(centre, radius, 0.0f, a_max, num_segments);
+    PathArcTo(centre, radius, 0.0f, a_max, num_segments - 1);
     PathFillConvex(col);
 }
 
@@ -1518,7 +1523,7 @@ void    ImFontAtlas::GetTexDataAsRGBA32(unsigned char** out_pixels, int* out_wid
         GetTexDataAsAlpha8(&pixels, NULL, NULL);
         if (pixels)
         {
-            TexPixelsRGBA32 = (unsigned int*)ImGui::MemAlloc((size_t)(TexWidth * TexHeight * 4));
+            TexPixelsRGBA32 = (unsigned int*)ImGui::MemAlloc((size_t)TexWidth * (size_t)TexHeight * 4);
             const unsigned char* src = pixels;
             unsigned int* dst = TexPixelsRGBA32;
             for (int n = TexWidth * TexHeight; n > 0; n--)
@@ -3010,13 +3015,14 @@ void ImGui::RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, Im
     const float inv_rounding = 1.0f / rounding;
     const float arc0_b = ImAcos01(1.0f - (p0.x - rect.Min.x) * inv_rounding);
     const float arc0_e = ImAcos01(1.0f - (p1.x - rect.Min.x) * inv_rounding);
+    const float half_pi = IM_PI * 0.5f; // We will == compare to this because we know this is the exact value ImAcos01 can return.
     const float x0 = ImMax(p0.x, rect.Min.x + rounding);
     if (arc0_b == arc0_e)
     {
         draw_list->PathLineTo(ImVec2(x0, p1.y));
         draw_list->PathLineTo(ImVec2(x0, p0.y));
     }
-    else if (arc0_b == 0.0f && arc0_e == IM_PI*0.5f)
+    else if (arc0_b == 0.0f && arc0_e == half_pi)
     {
         draw_list->PathArcToFast(ImVec2(x0, p1.y - rounding), rounding, 3, 6); // BL
         draw_list->PathArcToFast(ImVec2(x0, p0.y + rounding), rounding, 6, 9); // TR
@@ -3036,7 +3042,7 @@ void ImGui::RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, Im
             draw_list->PathLineTo(ImVec2(x1, p0.y));
             draw_list->PathLineTo(ImVec2(x1, p1.y));
         }
-        else if (arc1_b == 0.0f && arc1_e == IM_PI*0.5f)
+        else if (arc1_b == 0.0f && arc1_e == half_pi)
         {
             draw_list->PathArcToFast(ImVec2(x1, p0.y + rounding), rounding, 9, 12); // TR
             draw_list->PathArcToFast(ImVec2(x1, p1.y - rounding), rounding, 0, 3);  // BR

imgui_widgets.cpp

@@ -672,7 +672,7 @@ bool ImGui::CloseButton(ImGuiID id, const ImVec2& pos, float radius)
     // Render
     ImVec2 center = bb.GetCenter();
     if (hovered)
-        window->DrawList->AddCircleFilled(center, ImMax(2.0f, radius), GetColorU32((held && hovered) ? ImGuiCol_ButtonActive : ImGuiCol_ButtonHovered), 9);
+        window->DrawList->AddCircleFilled(center, ImMax(2.0f, radius), GetColorU32(held ? ImGuiCol_ButtonActive : ImGuiCol_ButtonHovered), 9);
 
     float cross_extent = (radius * 0.7071f) - 1.0f;
     ImU32 cross_col = GetColorU32(ImGuiCol_Text);
@@ -1666,7 +1666,7 @@ static float GetMinimumStepAtDecimalPrecision(int decimal_precision)
     static const float min_steps[10] = { 1.0f, 0.1f, 0.01f, 0.001f, 0.0001f, 0.00001f, 0.000001f, 0.0000001f, 0.00000001f, 0.000000001f };
     if (decimal_precision < 0)
         return FLT_MIN;
-    return (decimal_precision >= 0 && decimal_precision < 10) ? min_steps[decimal_precision] : ImPow(10.0f, (float)-decimal_precision);
+    return (decimal_precision < IM_ARRAYSIZE(min_steps)) ? min_steps[decimal_precision] : ImPow(10.0f, (float)-decimal_precision);
 }
 
 template<typename TYPE>
@@ -3898,9 +3898,14 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
             if (n + 1 == components)
                 PushItemWidth(w_item_last);
             if (flags & ImGuiColorEditFlags_Float)
-                value_changed = value_changed_as_float = value_changed | DragFloat(ids[n], &f[n], 1.0f/255.0f, 0.0f, hdr ? 0.0f : 1.0f, fmt_table_float[fmt_idx][n]);
+            {
+                value_changed |= DragFloat(ids[n], &f[n], 1.0f/255.0f, 0.0f, hdr ? 0.0f : 1.0f, fmt_table_float[fmt_idx][n]);
+                value_changed_as_float |= value_changed;
+            }
             else
+            {
                 value_changed |= DragInt(ids[n], &i[n], 1.0f, 0, hdr ? 0 : 255, fmt_table_int[fmt_idx][n]);
+            }
             if (!(flags & ImGuiColorEditFlags_NoOptions))
                 OpenPopupOnItemClick("context");
         }
@@ -4003,7 +4008,7 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
     {
         if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F))
         {
-            memcpy((float*)col, payload->Data, sizeof(float) * 3);
+            memcpy((float*)col, payload->Data, sizeof(float) * 3); // Preserve alpha if any
             value_changed = true;
         }
         if (const ImGuiPayload* payload = AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F))
@@ -4585,7 +4590,7 @@ void ImGui::ColorPickerOptionsPopup(const float* ref_col, ImGuiColorEditFlags fl
                 g.ColorEditOptions = (g.ColorEditOptions & ~ImGuiColorEditFlags__PickerMask) | (picker_flags & ImGuiColorEditFlags__PickerMask);
             SetCursorScreenPos(backup_pos);
             ImVec4 dummy_ref_col;
-            memcpy(&dummy_ref_col.x, ref_col, sizeof(float) * (picker_flags & ImGuiColorEditFlags_NoAlpha ? 3 : 4));
+            memcpy(&dummy_ref_col, ref_col, sizeof(float) * ((picker_flags & ImGuiColorEditFlags_NoAlpha) ? 3 : 4));
             ColorPicker4("##dummypicker", &dummy_ref_col.x, picker_flags);
             PopID();
         }
@@ -4988,7 +4993,7 @@ bool ImGui::CollapsingHeader(const char* label, bool* p_open, ImGuiTreeNodeFlags
         ImGuiItemHoveredDataBackup last_item_backup;
         float button_radius = g.FontSize * 0.5f;
         ImVec2 button_center = ImVec2(ImMin(window->DC.LastItemRect.Max.x, window->ClipRect.Max.x) - g.Style.FramePadding.x - button_radius, window->DC.LastItemRect.GetCenter().y);
-        if (CloseButton(window->GetID((void*)(intptr_t)(id+1)), button_center, button_radius))
+        if (CloseButton(window->GetID((void*)((intptr_t)id+1)), button_center, button_radius))
             *p_open = false;
         last_item_backup.Restore();
     }
@@ -5809,6 +5814,7 @@ ImGuiTabBar::ImGuiTabBar()
     ID = 0;
     SelectedTabId = NextSelectedTabId = VisibleTabId = 0;
     CurrFrameVisible = PrevFrameVisible = -1;
+    ContentsHeight = 0.0f;
     OffsetMax = OffsetNextTab = 0.0f;
     ScrollingAnim = ScrollingTarget = 0.0f;
     Flags = ImGuiTabBarFlags_None;
@@ -6422,7 +6428,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
         flags |= ImGuiTabItemFlags_NoCloseWithMiddleMouseButton;
 
     // Render tab label, process close button
-    const ImGuiID close_button_id = p_open ? window->GetID((void*)(intptr_t)(id + 1)) : 0;
+    const ImGuiID close_button_id = p_open ? window->GetID((void*)((intptr_t)id + 1)) : 0;
     bool just_closed = TabItemLabelAndCloseButton(display_draw_list, bb, flags, label, id, close_button_id);
     if (just_closed)
     {

misc/freetype/README.md

@@ -121,6 +121,5 @@ struct FreeTypeTest
 ```
 
 ### Known issues
-- FreeType's memory allocator is not overridden.
 - `cfg.OversampleH`, `OversampleV` are ignored (but perhaps not so necessary with this rasterizer).
 

misc/freetype/imgui_freetype.cpp

@@ -5,12 +5,13 @@
 // Changelog:
 // - v0.50: (2017/08/16) imported from https://github.com/Vuhdo/imgui_freetype into http://www.github.com/ocornut/imgui_club, updated for latest changes in ImFontAtlas, minor tweaks.
 // - v0.51: (2017/08/26) cleanup, optimizations, support for ImFontConfig::RasterizerFlags, ImFontConfig::RasterizerMultiply.
-// - v0.52: (2017/09/26) fixes for imgui internal changes
+// - v0.52: (2017/09/26) fixes for imgui internal changes.
-// - v0.53: (2017/10/22) minor inconsequential change to match change in master (removed an unnecessary statement)
+// - v0.53: (2017/10/22) minor inconsequential change to match change in master (removed an unnecessary statement).
-// - v0.54: (2018/01/22) fix for addition of ImFontAtlas::TexUvscale member
+// - v0.54: (2018/01/22) fix for addition of ImFontAtlas::TexUvscale member.
 // - v0.55: (2018/02/04) moved to main imgui repository (away from http://www.github.com/ocornut/imgui_club)
-// - v0.56: (2018/06/08) added support for ImFontConfig::GlyphMinAdvanceX, GlyphMaxAdvanceX
+// - v0.56: (2018/06/08) added support for ImFontConfig::GlyphMinAdvanceX, GlyphMaxAdvanceX.
 // - v0.60: (2019/01/10) re-factored to match big update in STB builder. fixed texture height waste. fixed redundant glyphs when merging. support for glyph padding.
+// - v0.61: (2019/01/15) added support for imgui allocators + added FreeType only override function SetAllocatorFunctions().
 
 // Gamma Correct Blending:
 //  FreeType assumes blending in linear space rather than gamma space.
@@ -18,7 +19,6 @@
 //  For correct results you need to be using sRGB and convert to linear space in the pixel shader output.
 //  The default imgui styles will be impacted by this change (alpha values will need tweaking).
 
-// FIXME: FreeType's memory allocator is not overridden.
 // FIXME: cfg.OversampleH, OversampleV are not supported (but perhaps not so necessary with this rasterizer).
 
 #include "imgui_freetype.h"
@@ -26,6 +26,7 @@
 #include <stdint.h>
 #include <ft2build.h>
 #include FT_FREETYPE_H          // <freetype/freetype.h>
+#include FT_MODULE_H            // <freetype/ftmodapi.h>
 #include FT_GLYPH_H             // <freetype/ftglyph.h>
 #include FT_SYNTHESIS_H         // <freetype/ftsynth.h>
 
@@ -115,7 +116,6 @@ namespace
 
     bool FreeTypeFont::InitFont(FT_Library ft_library, const ImFontConfig& cfg, unsigned int extra_user_flags)
     {
-        // FIXME: substitute allocator
         FT_Error error = FT_New_Memory_Face(ft_library, (uint8_t*)cfg.FontData, (uint32_t)cfg.FontDataSize, (uint32_t)cfg.FontNo, &Face);
         if (error != 0)
             return false;
@@ -566,15 +566,75 @@ bool ImFontAtlasBuildWithFreeType(FT_Library ft_library, ImFontAtlas* atlas, uns
     return true;
 }
 
+// Default memory allocators
+static void* ImFreeTypeDefaultAllocFunc(size_t size, void* user_data)	{ (void)user_data; return ImGui::MemAlloc(size); }
+static void  ImFreeTypeDefaultFreeFunc(void* ptr, void* user_data)	    { (void)user_data; ImGui::MemFree(ptr); }
+
+// Current memory allocators
+static void* (*GImFreeTypeAllocFunc)(size_t size, void* user_data) = ImFreeTypeDefaultAllocFunc;
+static void  (*GImFreeTypeFreeFunc)(void* ptr, void* user_data) = ImFreeTypeDefaultFreeFunc;
+static void* GImFreeTypeAllocatorUserData = NULL;
+
+// FreeType memory allocation callbacks
+static void* FreeType_Alloc(FT_Memory /*memory*/, long size)
+{
+    return GImFreeTypeAllocFunc((size_t)size, GImFreeTypeAllocatorUserData);
+}
+
+static void FreeType_Free(FT_Memory /*memory*/, void* block)
+{
+    GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
+}
+
+static void* FreeType_Realloc(FT_Memory /*memory*/, long cur_size, long new_size, void* block)
+{
+    // Implement realloc() as we don't ask user to provide it.
+    if (block == NULL)
+        return GImFreeTypeAllocFunc((size_t)new_size, GImFreeTypeAllocatorUserData);
+
+    if (new_size == 0)
+    {
+        GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
+        return NULL;
+    }
+
+    if (new_size > cur_size)
+    {
+        void* new_block = GImFreeTypeAllocFunc((size_t)new_size, GImFreeTypeAllocatorUserData);
+        memcpy(new_block, block, (size_t)cur_size);
+        GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
+        return new_block;
+    }
+
+    return block;
+}
+
 bool ImGuiFreeType::BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags)
 {
+    // FreeType memory management: https://www.freetype.org/freetype2/docs/design/design-4.html
+    FT_MemoryRec_ memory_rec = { 0 };
+    memory_rec.alloc = &FreeType_Alloc;
+    memory_rec.free = &FreeType_Free;
+    memory_rec.realloc = &FreeType_Realloc;
+
+    // https://www.freetype.org/freetype2/docs/reference/ft2-module_management.html#FT_New_Library
     FT_Library ft_library;
-    FT_Error error = FT_Init_FreeType(&ft_library);
+    FT_Error error = FT_New_Library(&memory_rec, &ft_library);
     if (error != 0)
         return false;
 
+    // If you don't call FT_Add_Default_Modules() the rest of code may work, but FreeType won't use our custom allocator.
+    FT_Add_Default_Modules(ft_library);
+
     bool ret = ImFontAtlasBuildWithFreeType(ft_library, atlas, extra_flags);
-    FT_Done_FreeType(ft_library);
+    FT_Done_Library(ft_library);
 
     return ret;
 }
+
+void ImGuiFreeType::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data)
+{
+    GImFreeTypeAllocFunc = alloc_func;
+    GImFreeTypeFreeFunc = free_func;
+    GImFreeTypeAllocatorUserData = user_data;
+}

misc/freetype/imgui_freetype.h

@@ -28,4 +28,8 @@ namespace ImGuiFreeType
     };
 
     IMGUI_API bool BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags = 0);
+
+    // By default ImGuiFreeType will use ImGui::MemAlloc()/MemFree().
+    // However, as FreeType does lots of allocations we provide a way for the user to redirect it to a separate memory heap if desired:
+    IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
 }