Updated ImGui.

3rdparty/dear-imgui/imgui.cpp

@@ -6,7 +6,7 @@
 // Get latest version at https://github.com/ocornut/imgui
 // Releases change-log at https://github.com/ocornut/imgui/releases
 // Technical Support for Getting Started https://discourse.dearimgui.org/c/getting-started
-// Gallery (please post your screenshots/video there!): https://github.com/ocornut/imgui/issues/2529
+// Gallery (please post your screenshots/video there!): https://github.com/ocornut/imgui/issues/2847
 
 // Developed by Omar Cornut and every direct or indirect contributors to the GitHub.
 // See LICENSE.txt for copyright and licensing details (standard MIT License).
@@ -28,7 +28,7 @@ DOCUMENTATION
 
 - MISSION STATEMENT
 - END-USER GUIDE
-- PROGRAMMER GUIDE (read me!)
+- PROGRAMMER GUIDE
   - Read first.
   - How to update to a newer version of Dear ImGui.
   - Getting started with integrating Dear ImGui in your code/engine.
@@ -36,26 +36,8 @@ DOCUMENTATION
   - This is how a simple rendering function may look like.
   - Using gamepad/keyboard navigation controls.
 - API BREAKING CHANGES (read me when you update!)
-- FREQUENTLY ASKED QUESTIONS (FAQ), TIPS
-  - Where is the documentation?
-  - Which version should I get?
-  - Who uses Dear ImGui?
-  - Why the odd dual naming, "Dear ImGui" vs "ImGui"?
-  - How can I tell whether to dispatch mouse/keyboard to imgui or to my application?
-  - How can I display an image? What is ImTextureID, how does it works?
-  - Why are multiple widgets reacting when I interact with a single one? How can I have
-    multiple widgets with the same label or with an empty label? A primer on labels and the ID Stack...
-  - How can I use my own math types instead of ImVec2/ImVec4?
-  - How can I load a different font than the default?
-  - How can I easily use icons in my application?
-  - How can I load multiple fonts?
-  - How can I display and input non-latin characters such as Chinese, Japanese, Korean, Cyrillic?
-  - How can I interact with standard C++ types (such as std::string and std::vector)?
-  - How can I use the drawing facilities without a Dear ImGui window? (using ImDrawList API)
-  - How can I use Dear ImGui on a platform that doesn't have a mouse or a keyboard? (input share, remoting, gamepad)
-  - I integrated Dear ImGui in my engine and the text or lines are blurry..
-  - I integrated Dear ImGui in my engine and some elements are clipping or disappearing when I move windows around..
-  - How can I help?
+- FREQUENTLY ASKED QUESTIONS (FAQ)
+  - Read all answers online: https://www.dearimgui.org/faq, or in docs/FAQ.md (with a Markdown viewer)
 
 CODE
 (search for "[SECTION]" in the code to find them)
@@ -137,7 +119,7 @@ CODE
 
  READ FIRST:
 
- - Read the FAQ below this section!
+ - Remember to read the FAQ (https://www.dearimgui.org/faq)
  - Your code creates the UI, if your code doesn't run the UI is gone! The UI can be highly dynamic, there are no construction
    or destruction steps, less superfluous data retention on your side, less state duplication, less state synchronization, less bugs.
  - Call and read ImGui::ShowDemoWindow() for demo code demonstrating most features.
@@ -234,7 +216,7 @@ CODE
 
      // At this point you've got the texture data and you need to upload that your your graphic system:
      // After we have created the texture, store its pointer/identifier (_in whichever format your engine uses_) in 'io.Fonts->TexID'.
-     // This will be passed back to your via the renderer. Basically ImTextureID == void*. Read FAQ below for details about ImTextureID.
+     // This will be passed back to your via the renderer. Basically ImTextureID == void*. Read FAQ for details about ImTextureID.
      MyTexture* texture = MyEngine::CreateTextureFromMemoryPixels(pixels, width, height, TEXTURE_TYPE_RGBA32)
      io.Fonts->TexID = (void*)texture;
 
@@ -320,8 +302,8 @@ CODE
  - The examples/ folders contains many actual implementation of the pseudo-codes above.
  - When calling NewFrame(), the 'io.WantCaptureMouse', 'io.WantCaptureKeyboard' and 'io.WantTextInput' flags are updated.
    They tell you if Dear ImGui intends to use your inputs. When a flag is set you want to hide the corresponding inputs from the
-   rest of your application. In every cases you need to pass on the inputs to Dear ImGui. Refer to the FAQ for more information.
- - Please read the FAQ below!. Amusingly, it is called a FAQ because people frequently run into the same issues!
+   rest of your application. In every cases you need to pass on the inputs to Dear ImGui.
+ - Refer to the FAQ for more information. Amusingly, it is called a FAQ because people frequently run into the same issues!
 
  USING GAMEPAD/KEYBOARD NAVIGATION CONTROLS
 
@@ -573,8 +555,14 @@ CODE
  - 2014/08/28 (1.09) - changed the behavior of IO.PixelCenterOffset following various rendering fixes
 
 
- FREQUENTLY ASKED QUESTIONS (FAQ), TIPS
- ======================================
+ FREQUENTLY ASKED QUESTIONS (FAQ)
+ ================================
+
+ Read all answers online: https://www.dearimgui.org/faq, or in docs/FAQ.md (with a Markdown viewer)
+ Some answers are copied down here to facilitate searching in code.
+
+ Q&A: Basics
+ ===========
 
  Q: Where is the documentation?
  A: This library is poorly documented at the moment and expects of the user to be acquainted with C/C++.
@@ -588,26 +576,20 @@ CODE
       associated to it.
 
  Q: Which version should I get?
- A: I occasionally tag Releases (https://github.com/ocornut/imgui/releases) but it is generally safe
-    and recommended to sync to master/latest. The library is fairly stable and regressions tend to be
-    fixed fast when reported. You may also peak at the 'docking' branch which includes:
-    - Docking/Merging features (https://github.com/ocornut/imgui/issues/2109)
-    - Multi-viewport features (https://github.com/ocornut/imgui/issues/1542)
-    Many projects are using this branch and it is kept in sync with master regularly.
+ Q: Why the names "Dear ImGui" vs "ImGui"?
+ >> See https://www.dearimgui.org/faq
+
+ Q&A: Concerns
+ =============
 
  Q: Who uses Dear ImGui?
- A: See "Quotes" (https://github.com/ocornut/imgui/wiki/Quotes) and
-    "Software using Dear ImGui" (https://github.com/ocornut/imgui/wiki/Software-using-dear-imgui) Wiki pages
-    for a list of games/software which are publicly known to use dear imgui. Please add yours if you can!
-
- Q: Why the odd dual naming, "Dear ImGui" vs "ImGui"?
- A: The library started its life as "ImGui" due to the fact that I didn't give it a proper name when
-    when I released 1.0, and had no particular expectation that it would take off. However, the term IMGUI
-    (immediate-mode graphical user interface) was coined before and is being used in variety of other
-    situations (e.g. Unity uses it own implementation of the IMGUI paradigm).
-    To reduce the ambiguity without affecting existing code bases, I have decided on an alternate,
-    longer name "Dear ImGui" that people can use to refer to this specific library.
-    Please try to refer to this library as "Dear ImGui".
+ Q: Can you create elaborate/serious tools with Dear ImGui?
+ Q: Can you reskin the look of Dear ImGui?
+ Q: Why using C++ (as opposed to C)?
+ >> See https://www.dearimgui.org/faq
+
+ Q&A: Integration
+ ================
 
  Q: How can I tell whether to dispatch mouse/keyboard to Dear ImGui or to my application?
  A: You can read the 'io.WantCaptureMouse', 'io.WantCaptureKeyboard' and 'io.WantTextInput' flags from the ImGuiIO structure (e.g. if (ImGui::GetIO().WantCaptureMouse) { ... } )
@@ -624,75 +606,13 @@ CODE
      have 'io.WantCaptureKeyboard=false'. Depending on your application logic it may or not be inconvenient. You might want to track which key-downs
      were targeted for Dear ImGui, e.g. with an array of bool, and filter out the corresponding key-ups.)
 
- Q: How can I display an image? What is ImTextureID, how does it works?
- A: Short explanation:
-    - Please read Wiki entry for examples: https://github.com/ocornut/imgui/wiki/Image-Loading-and-Displaying-Examples
-    - You may use functions such as ImGui::Image(), ImGui::ImageButton() or lower-level ImDrawList::AddImage() to emit draw calls that will use your own textures.
-    - Actual textures are identified in a way that is up to the user/engine. Those identifiers are stored and passed as ImTextureID (void*) value.
-    - Loading image files from the disk and turning them into a texture is not within the scope of Dear ImGui (for a good reason).
-      Please read documentations or tutorials on your graphics API to understand how to display textures on the screen before moving onward.
-
-    Long explanation:
-    - Dear ImGui's job is to create "meshes", defined in a renderer-agnostic format made of draw commands and vertices.
-      At the end of the frame those meshes (ImDrawList) will be displayed by your rendering function. They are made up of textured polygons and the code
-      to render them is generally fairly short (a few dozen lines). In the examples/ folder we provide functions for popular graphics API (OpenGL, DirectX, etc.).
-    - Each rendering function decides on a data type to represent "textures". The concept of what is a "texture" is entirely tied to your underlying engine/graphics API.
-      We carry the information to identify a "texture" in the ImTextureID type.
-      ImTextureID is nothing more that a void*, aka 4/8 bytes worth of data: just enough to store 1 pointer or 1 integer of your choice.
-      Dear ImGui doesn't know or understand what you are storing in ImTextureID, it merely pass ImTextureID values until they reach your rendering function.
-    - In the examples/ bindings, for each graphics API binding we decided on a type that is likely to be a good representation for specifying
-      an image from the end-user perspective. This is what the _examples_ rendering functions are using:
-
-         OpenGL:     ImTextureID = GLuint                       (see ImGui_ImplOpenGL3_RenderDrawData() function in imgui_impl_opengl3.cpp)
-         DirectX9:   ImTextureID = LPDIRECT3DTEXTURE9           (see ImGui_ImplDX9_RenderDrawData()     function in imgui_impl_dx9.cpp)
-         DirectX11:  ImTextureID = ID3D11ShaderResourceView*    (see ImGui_ImplDX11_RenderDrawData()    function in imgui_impl_dx11.cpp)
-         DirectX12:  ImTextureID = D3D12_GPU_DESCRIPTOR_HANDLE  (see ImGui_ImplDX12_RenderDrawData()    function in imgui_impl_dx12.cpp)
-
-      For example, in the OpenGL example binding we store raw OpenGL texture identifier (GLuint) inside ImTextureID.
-      Whereas in the DirectX11 example binding we store a pointer to ID3D11ShaderResourceView inside ImTextureID, which is a higher-level structure
-      tying together both the texture and information about its format and how to read it.
-    - If you have a custom engine built over e.g. OpenGL, instead of passing GLuint around you may decide to use a high-level data type to carry information about
-      the texture as well as how to display it (shaders, etc.). The decision of what to use as ImTextureID can always be made better knowing how your codebase
-      is designed. If your engine has high-level data types for "textures" and "material" then you may want to use them.
-      If you are starting with OpenGL or DirectX or Vulkan and haven't built much of a rendering engine over them, keeping the default ImTextureID
-      representation suggested by the example bindings is probably the best choice.
-      (Advanced users may also decide to keep a low-level type in ImTextureID, and use ImDrawList callback and pass information to their renderer)
-
-    User code may do:
-
-        // Cast our texture type to ImTextureID / void*
-        MyTexture* texture = g_CoffeeTableTexture;
-        ImGui::Image((void*)texture, ImVec2(texture->Width, texture->Height));
-
-    The renderer function called after ImGui::Render() will receive that same value that the user code passed:
-
-        // Cast ImTextureID / void* stored in the draw command as our texture type
-        MyTexture* texture = (MyTexture*)pcmd->TextureId;
-        MyEngineBindTexture2D(texture);
-
-    Once you understand this design you will understand that loading image files and turning them into displayable textures is not within the scope of Dear ImGui.
-    This is by design and is actually a good thing, because it means your code has full control over your data types and how you display them.
-    If you want to display an image file (e.g. PNG file) into the screen, please refer to documentation and tutorials for the graphics API you are using.
-
-    Refer to the Wiki to find simplified examples for loading textures with OpenGL, DirectX9 and DirectX11:
-
-        https://github.com/ocornut/imgui/wiki/Image-Loading-and-Displaying-Examples
-
-    C/C++ tip: a void* is pointer-sized storage. You may safely store any pointer or integer into it by casting your value to ImTextureID / void*, and vice-versa.
-    Because both end-points (user code and rendering function) are under your control, you know exactly what is stored inside the ImTextureID / void*.
-    Examples:
-
-        GLuint my_tex = XXX;
-        void* my_void_ptr;
-        my_void_ptr = (void*)(intptr_t)my_tex;                  // cast a GLuint into a void* (we don't take its address! we literally store the value inside the pointer)
-        my_tex = (GLuint)(intptr_t)my_void_ptr;                 // cast a void* into a GLuint
-
-        ID3D11ShaderResourceView* my_dx11_srv = XXX;
-        void* my_void_ptr;
-        my_void_ptr = (void*)my_dx11_srv;                       // cast a ID3D11ShaderResourceView* into an opaque void*
-        my_dx11_srv = (ID3D11ShaderResourceView*)my_void_ptr;   // cast a void* into a ID3D11ShaderResourceView*
-
-    Finally, you may call ImGui::ShowMetricsWindow() to explore/visualize/understand how the ImDrawList are generated.
+ Q: How can I use this without a mouse, without a keyboard or without a screen? (gamepad, input share, remote display)
+ Q: I integrated Dear ImGui in my engine and the text or lines are blurry..
+ Q: I integrated Dear ImGui in my engine and some elements are clipping or disappearing when I move windows around..
+ >> See https://www.dearimgui.org/faq
+
+ Q&A: Usage
+ ----------
 
  Q: Why are multiple widgets reacting when I interact with a single one?
  Q: How can I have multiple widgets with the same label or with an empty label?
@@ -810,141 +730,25 @@ CODE
       e.g. when displaying a list of objects, using indices or pointers as ID will preserve the
        node open/closed state differently. See what makes more sense in your situation!
 
+ Q: How can I display an image? What is ImTextureID, how does it works?
+ >> See https://www.dearimgui.org/faq and https://github.com/ocornut/imgui/wiki/Image-Loading-and-Displaying-Examples
+
  Q: How can I use my own math types instead of ImVec2/ImVec4?
- A: You can edit imconfig.h and setup the IM_VEC2_CLASS_EXTRA/IM_VEC4_CLASS_EXTRA macros to add implicit type conversions.
-    This way you'll be able to use your own types everywhere, e.g. passing glm::vec2 to ImGui functions instead of ImVec2.
+ Q: How can I interact with standard C++ types (such as std::string and std::vector)?
+ Q: How can I display custom shapes? (using low-level ImDrawList API)
+ >> See https://www.dearimgui.org/faq
 
- Q: How can I load a different font than the default?
- 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()
-    Default is ProggyClean.ttf, monospace, rendered at size 13, embedded in dear imgui's source code.
-    (Tip: monospace fonts are convenient because they allow to facilitate horizontal alignment directly at the string level.)
-    (Read the 'misc/fonts/README.txt' file for more details about font loading.)
-
-    New programmers: remember that in C/C++ and most programming languages if you want to use a
-    backslash \ within a string literal, you need to write it double backslash "\\":
-      io.Fonts->AddFontFromFileTTF("MyDataFolder\MyFontFile.ttf", size_in_pixels);   // WRONG (you are escape the M here!)
-      io.Fonts->AddFontFromFileTTF("MyDataFolder\\MyFontFile.ttf", size_in_pixels);  // CORRECT
-      io.Fonts->AddFontFromFileTTF("MyDataFolder/MyFontFile.ttf", size_in_pixels);   // ALSO CORRECT
+ Q&A: Fonts, Text
+ ================
 
+ Q: How can I load a different font than the default?
  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.
-    You may want to see ImFontConfig::GlyphMinAdvanceX to make your icon look monospace to facilitate alignment.
-    (Read the 'misc/fonts/README.txt' file for more details about icons font loading.)
-    With some extra effort, you may use colorful icon by registering custom rectangle space inside the font atlas,
-    and copying your own graphics data into it. See misc/fonts/README.txt about using the AddCustomRectFontGlyph API.
-
  Q: How can I load multiple fonts?
- A: Use the font atlas to pack them into a single texture:
-    (Read the 'misc/fonts/README.txt' file and the code in ImFontAtlas for more details.)
-
-      ImGuiIO& io = ImGui::GetIO();
-      ImFont* font0 = io.Fonts->AddFontDefault();
-      ImFont* font1 = io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels);
-      ImFont* font2 = io.Fonts->AddFontFromFileTTF("myfontfile2.ttf", size_in_pixels);
-      io.Fonts->GetTexDataAsRGBA32() or GetTexDataAsAlpha8()
-      // the first loaded font gets used by default
-      // use ImGui::PushFont()/ImGui::PopFont() to change the font at runtime
-
-      // Options
-      ImFontConfig config;
-      config.OversampleH = 2;
-      config.OversampleV = 1;
-      config.GlyphOffset.y -= 1.0f;      // Move everything by 1 pixels up
-      config.GlyphExtraSpacing.x = 1.0f; // Increase spacing between characters
-      io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_pixels, &config);
-
-      // Combine multiple fonts into one (e.g. for icon fonts)
-      static ImWchar ranges[] = { 0xf000, 0xf3ff, 0 };
-      ImFontConfig config;
-      config.MergeMode = true;
-      io.Fonts->AddFontDefault();
-      io.Fonts->AddFontFromFileTTF("fontawesome-webfont.ttf", 16.0f, &config, ranges); // Merge icon font
-      io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_pixels, NULL, &config, io.Fonts->GetGlyphRangesJapanese()); // Merge japanese glyphs
-
  Q: How can I display and input non-Latin characters such as Chinese, Japanese, Korean, Cyrillic?
- A: When loading a font, pass custom Unicode ranges to specify the glyphs to load.
-
-      // Add default Japanese ranges
-      io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, NULL, io.Fonts->GetGlyphRangesJapanese());
-
-      // Or create your own custom ranges (e.g. for a game you can feed your entire game script and only build the characters the game need)
-      ImVector<ImWchar> ranges;
-      ImFontGlyphRangesBuilder builder;
-      builder.AddText("Hello world");                        // Add a string (here "Hello world" contains 7 unique characters)
-      builder.AddChar(0x7262);                               // Add a specific character
-      builder.AddRanges(io.Fonts->GetGlyphRangesJapanese()); // Add one of the default ranges
-      builder.BuildRanges(&ranges);                          // Build the final result (ordered ranges with all the unique characters submitted)
-      io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, NULL, ranges.Data);
-
-    All your strings needs to use UTF-8 encoding. In C++11 you can encode a string literal in UTF-8
-    by using the u8"hello" syntax. Specifying literal in your source code using a local code page
-    (such as CP-923 for Japanese or CP-1251 for Cyrillic) will NOT work!
-    Otherwise you can convert yourself to UTF-8 or load text data from file already saved as UTF-8.
-
-    Text input: it is up to your application to pass the right character code by calling io.AddInputCharacter().
-    The applications in examples/ are doing that.
-    Windows: you can use the WM_CHAR or WM_UNICHAR or WM_IME_CHAR message (depending if your app is built using Unicode or MultiByte mode).
-    You may also use MultiByteToWideChar() or ToUnicode() to retrieve Unicode codepoints from MultiByte characters or keyboard state.
-    Windows: if your language is relying on an Input Method Editor (IME), you copy the HWND of your window to io.ImeWindowHandle in order for
-    the default implementation of io.ImeSetInputScreenPosFn() to set your Microsoft IME position correctly.
-
- Q: How can I interact with standard C++ types (such as std::string and std::vector)?
- A: - Being highly portable (bindings for several languages, frameworks, programming style, obscure or older platforms/compilers),
-      and aiming for compatibility & performance suitable for every modern real-time game engines, dear imgui does not use
-      any of std C++ types. We use raw types (e.g. char* instead of std::string) because they adapt to more use cases.
-    - To use ImGui::InputText() with a std::string or any resizable string class, see misc/cpp/imgui_stdlib.h.
-    - To use combo boxes and list boxes with std::vector or any other data structure: the BeginCombo()/EndCombo() API
-      lets you iterate and submit items yourself, so does the ListBoxHeader()/ListBoxFooter() API.
-      Prefer using them over the old and awkward Combo()/ListBox() api.
-    - Generally for most high-level types you should be able to access the underlying data type.
-      You may write your own one-liner wrappers to facilitate user code (tip: add new functions in ImGui:: namespace from your code).
-    - Dear ImGui applications often need to make intensive use of strings. It is expected that many of the strings you will pass
-      to the API are raw literals (free in C/C++) or allocated in a manner that won't incur a large cost on your application.
-      Please bear in mind that using std::string on applications with large amount of UI may incur unsatisfactory performances.
-      Modern implementations of std::string often include small-string optimization (which is often a local buffer) but those
-      are not configurable and not the same across implementations.
-    - If you are finding your UI traversal cost to be too large, make sure your string usage is not leading to excessive amount
-      of heap allocations. Consider using literals, statically sized buffers and your own helper functions. A common pattern
-      is that you will need to build lots of strings on the fly, and their maximum length can be easily be scoped ahead.
-      One possible implementation of a helper to facilitate printf-style building of strings: https://github.com/ocornut/Str
-      This is a small helper where you can instance strings with configurable local buffers length. Many game engines will
-      provide similar or better string helpers.
-
- Q: How can I use the drawing facilities without an ImGui window? (using ImDrawList API)
- A: - You can create a dummy window. Call Begin() with the NoBackground | NoDecoration | NoSavedSettings | NoInputs flags.
-      (The ImGuiWindowFlags_NoDecoration flag itself is a shortcut for NoTitleBar | NoResize | NoScrollbar | NoCollapse)
-      Then you can retrieve the ImDrawList* via GetWindowDrawList() and draw to it in any way you like.
-    - You can call ImGui::GetBackgroundDrawList() or ImGui::GetForegroundDrawList() and use those draw list to display
-      contents behind or over every other imgui windows (one bg/fg drawlist per viewport).
-    - You can create your own ImDrawList instance. You'll need to initialize them ImGui::GetDrawListSharedData(), or create
-      your own ImDrawListSharedData, and then call your rendered code with your own ImDrawList or ImDrawData data.
-
- Q: How can I use this without a mouse, without a keyboard or without a screen? (gamepad, input share, remote display)
- A: - You can control Dear ImGui with a gamepad. Read about navigation in "Using gamepad/keyboard navigation controls".
-      (short version: map gamepad inputs into the io.NavInputs[] array + set io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad)
-    - You can share your computer mouse seamlessly with your console/tablet/phone using Synergy (https://symless.com/synergy)
-      This is the preferred solution for developer productivity.
-      In particular, the "micro-synergy-client" repository (https://github.com/symless/micro-synergy-client) has simple
-      and portable source code (uSynergy.c/.h) for a small embeddable client that you can use on any platform to connect
-      to your host computer, based on the Synergy 1.x protocol. Make sure you download the Synergy 1 server on your computer.
-      Console SDK also sometimes provide equivalent tooling or wrapper for Synergy-like protocols.
-    - You may also use a third party solution such as Remote ImGui (https://github.com/JordiRos/remoteimgui) which sends
-      the vertices to render over the local network, allowing you to use Dear ImGui even on a screen-less machine.
-    - For touch inputs, you can increase the hit box of widgets (via the style.TouchPadding setting) to accommodate
-      for the lack of precision of touch inputs, but it is recommended you use a mouse or gamepad to allow optimizing
-      for screen real-estate and precision.
+ >> See https://www.dearimgui.org/faq and misc/fonts/README.txt
 
- Q: I integrated Dear ImGui in my engine and the text or lines are blurry..
- A: In your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f).
-    Also make sure your orthographic projection matrix and io.DisplaySize matches your actual framebuffer dimension.
-
- Q: I integrated Dear ImGui in my engine and some elements are clipping or disappearing when I move windows around..
- A: You are probably mishandling the clipping rectangles in your render function.
-    Rectangles provided by ImGui are defined as (x1=left,y1=top,x2=right,y2=bottom) and NOT as (x1,y1,width,height).
+ Q&A: Community
+ ==============
 
  Q: How can I help?
  A: - If you are experienced with Dear ImGui and C++, look at the github issues, look at the Wiki, read docs/TODO.txt
@@ -952,15 +756,10 @@ CODE
     - Businesses: convince your company to fund development via support contracts/sponsoring! This is among the most useful thing you can do for dear imgui.
     - Individuals: you can also become a Patron (http://www.patreon.com/imgui) or donate on PayPal! See README.
     - Disclose your usage of dear imgui via a dev blog post, a tweet, a screenshot, a mention somewhere etc.
-      You may post screenshot or links in the gallery threads (github.com/ocornut/imgui/issues/1902). Visuals are ideal as they inspire other programmers.
+      You may post screenshot or links in the gallery threads (github.com/ocornut/imgui/issues/2847). Visuals are ideal as they inspire other programmers.
       But even without visuals, disclosing your use of dear imgui help the library grow credibility, and help other teams and programmers with taking decisions.
     - If you have issues or if you need to hack into the library, even if you don't expect any support it is useful that you share your issues (on github or privately).
 
- - tip: you can call Begin() multiple times with the same name during the same frame, it will keep appending to the same window.
-        this is also useful to set yourself in the context of another window (to get/set other settings)
- - tip: you can create widgets without a Begin()/End() block, they will go in an implicit window called "Debug".
- - tip: call and read the ShowDemoWindow() code in imgui_demo.cpp for more example of how to use ImGui!
-
 */
 
 #if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
@@ -2510,7 +2309,7 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
 
         float ellipsis_glyph_width = glyph->X1;                 // Width of the glyph with no padding on either side
         float ellipsis_total_width = ellipsis_glyph_width;      // Full width of entire ellipsis
-        
+
         if (ellipsis_char_count > 1)
         {
             // Full ellipsis size without free spacing after it.
@@ -2518,7 +2317,7 @@ void ImGui::RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, con
             ellipsis_glyph_width = glyph->X1 - glyph->X0 + spacing_between_dots;
             ellipsis_total_width = ellipsis_glyph_width * (float)ellipsis_char_count - spacing_between_dots;
         }
-        
+
         // We can now claim the space between pos_max.x and ellipsis_max.x
         const float text_avail_width = ImMax((ImMax(pos_max.x, ellipsis_max_x) - ellipsis_total_width) - pos_min.x, 1.0f);
         float text_size_clipped_x = font->CalcTextSizeA(font_size, text_avail_width, 0.0f, text, text_end_full, &text_end_ellipsis).x;
@@ -2984,8 +2783,8 @@ void ImGui::ItemSize(const ImVec2& size, float text_baseline_y)
     //if (g.IO.KeyAlt) window->DrawList->AddRect(window->DC.CursorPos, window->DC.CursorPos + ImVec2(size.x, line_height), IM_COL32(255,0,0,200)); // [DEBUG]
     window->DC.CursorPosPrevLine.x = window->DC.CursorPos.x + size.x;
     window->DC.CursorPosPrevLine.y = window->DC.CursorPos.y;
-    window->DC.CursorPos.x = (float)(int)(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);    // Next line
-    window->DC.CursorPos.y = (float)(int)(window->DC.CursorPos.y + line_height + g.Style.ItemSpacing.y);        // Next line
+    window->DC.CursorPos.x = IM_FLOOR(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);    // Next line
+    window->DC.CursorPos.y = IM_FLOOR(window->DC.CursorPos.y + line_height + g.Style.ItemSpacing.y);        // Next line
     window->DC.CursorMaxPos.x = ImMax(window->DC.CursorMaxPos.x, window->DC.CursorPosPrevLine.x);
     window->DC.CursorMaxPos.y = ImMax(window->DC.CursorMaxPos.y, window->DC.CursorPos.y - g.Style.ItemSpacing.y);
     //if (g.IO.KeyAlt) window->DrawList->AddCircle(window->DC.CursorMaxPos, 3.0f, IM_COL32(255,0,0,255), 4); // [DEBUG]
@@ -4324,7 +4123,7 @@ ImVec2 ImGui::CalcTextSize(const char* text, const char* text_end, bool hide_tex
     ImVec2 text_size = font->CalcTextSizeA(font_size, FLT_MAX, wrap_width, text, text_display_end, NULL);
 
     // Round
-    text_size.x = (float)(int)(text_size.x + 0.95f);
+    text_size.x = IM_FLOOR(text_size.x + 0.95f);
 
     return text_size;
 }
@@ -4966,8 +4765,8 @@ static ImVec2 CalcWindowContentSize(ImGuiWindow* window)
         return window->ContentSize;
 
     ImVec2 sz;
-    sz.x = (float)(int)((window->ContentSizeExplicit.x != 0.0f) ? window->ContentSizeExplicit.x : window->DC.CursorMaxPos.x - window->DC.CursorStartPos.x);
-    sz.y = (float)(int)((window->ContentSizeExplicit.y != 0.0f) ? window->ContentSizeExplicit.y : window->DC.CursorMaxPos.y - window->DC.CursorStartPos.y);
+    sz.x = IM_FLOOR((window->ContentSizeExplicit.x != 0.0f) ? window->ContentSizeExplicit.x : window->DC.CursorMaxPos.x - window->DC.CursorStartPos.x);
+    sz.y = IM_FLOOR((window->ContentSizeExplicit.y != 0.0f) ? window->ContentSizeExplicit.y : window->DC.CursorMaxPos.y - window->DC.CursorStartPos.y);
     return sz;
 }
 
@@ -5078,8 +4877,8 @@ static bool ImGui::UpdateManualResize(ImGuiWindow* window, const ImVec2& size_au
 
     bool ret_auto_fit = false;
     const int resize_border_count = g.IO.ConfigWindowsResizeFromEdges ? 4 : 0;
-    const float grip_draw_size = (float)(int)ImMax(g.FontSize * 1.35f, window->WindowRounding + 1.0f + g.FontSize * 0.2f);
-    const float grip_hover_inner_size = (float)(int)(grip_draw_size * 0.75f);
+    const float grip_draw_size = IM_FLOOR(ImMax(g.FontSize * 1.35f, window->WindowRounding + 1.0f + g.FontSize * 0.2f));
+    const float grip_hover_inner_size = IM_FLOOR(grip_draw_size * 0.75f);
     const float grip_hover_outer_size = g.IO.ConfigWindowsResizeFromEdges ? WINDOWS_RESIZE_FROM_EDGES_HALF_THICKNESS : 0.0f;
 
     ImVec2 pos_target(FLT_MAX, FLT_MAX);
@@ -5387,7 +5186,7 @@ void ImGui::RenderWindowTitleBarContents(ImGuiWindow* window, const ImRect& titl
     if (flags & ImGuiWindowFlags_UnsavedDocument)
     {
         ImVec2 marker_pos = ImVec2(ImMax(layout_r.Min.x, layout_r.Min.x + (layout_r.GetWidth() - text_size.x) * style.WindowTitleAlign.x) + text_size.x, layout_r.Min.y) + ImVec2(2 - marker_size_x, 0.0f);
-        ImVec2 off = ImVec2(0.0f, (float)(int)(-g.FontSize * 0.25f));
+        ImVec2 off = ImVec2(0.0f, IM_FLOOR(-g.FontSize * 0.25f));
         RenderTextClipped(marker_pos + off, layout_r.Max + off, UNSAVED_DOCUMENT_MARKER, NULL, NULL, ImVec2(0, style.WindowTitleAlign.y), &clip_r);
     }
 }
@@ -5725,9 +5524,9 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
 
         // Handle manual resize: Resize Grips, Borders, Gamepad
         int border_held = -1;
-        ImU32 resize_grip_col[4] = { 0 };
+        ImU32 resize_grip_col[4] = {};
         const int resize_grip_count = g.IO.ConfigWindowsResizeFromEdges ? 2 : 1; // 4
-        const float resize_grip_draw_size = (float)(int)ImMax(g.FontSize * 1.35f, window->WindowRounding + 1.0f + g.FontSize * 0.2f);
+        const float resize_grip_draw_size = IM_FLOOR(ImMax(g.FontSize * 1.35f, window->WindowRounding + 1.0f + g.FontSize * 0.2f));
         if (!window->Collapsed)
             if (UpdateManualResize(window, size_auto_fit, &border_held, resize_grip_count, &resize_grip_col[0]))
                 use_current_size_for_scrollbar_x = use_current_size_for_scrollbar_y = true;
@@ -5795,9 +5594,9 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
 
         // Default item width. Make it proportional to window size if window manually resizes
         if (window->Size.x > 0.0f && !(flags & ImGuiWindowFlags_Tooltip) && !(flags & ImGuiWindowFlags_AlwaysAutoResize))
-            window->ItemWidthDefault = (float)(int)(window->Size.x * 0.65f);
+            window->ItemWidthDefault = ImFloor(window->Size.x * 0.65f);
         else
-            window->ItemWidthDefault = (float)(int)(g.FontSize * 16.0f);
+            window->ItemWidthDefault = ImFloor(g.FontSize * 16.0f);
 
         // SCROLLING
 
@@ -6191,8 +5990,8 @@ void ImGui::PushMultiItemsWidths(int components, float w_full)
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
     const ImGuiStyle& style = g.Style;
-    const float w_item_one  = ImMax(1.0f, (float)(int)((w_full - (style.ItemInnerSpacing.x) * (components-1)) / (float)components));
-    const float w_item_last = ImMax(1.0f, (float)(int)(w_full - (w_item_one + style.ItemInnerSpacing.x) * (components-1)));
+    const float w_item_one  = ImMax(1.0f, IM_FLOOR((w_full - (style.ItemInnerSpacing.x) * (components-1)) / (float)components));
+    const float w_item_last = ImMax(1.0f, IM_FLOOR(w_full - (w_item_one + style.ItemInnerSpacing.x) * (components-1)));
     window->DC.ItemWidthStack.push_back(w_item_last);
     for (int i = 0; i < components-1; i++)
         window->DC.ItemWidthStack.push_back(w_item_one);
@@ -6223,7 +6022,7 @@ float ImGui::CalcItemWidth()
         float region_max_x = GetContentRegionMaxAbs().x;
         w = ImMax(1.0f, region_max_x - window->DC.CursorPos.x + w);
     }
-    w = (float)(int)w;
+    w = IM_FLOOR(w);
     return w;
 }
 
@@ -7328,7 +7127,7 @@ void ImGui::SetScrollFromPosX(ImGuiWindow* window, float local_x, float center_x
 {
     // We store a target position so centering can occur on the next frame when we are guaranteed to have a known window size
     IM_ASSERT(center_x_ratio >= 0.0f && center_x_ratio <= 1.0f);
-    window->ScrollTarget.x = (float)(int)(local_x + window->Scroll.x);
+    window->ScrollTarget.x = IM_FLOOR(local_x + window->Scroll.x);
     window->ScrollTargetCenterRatio.x = center_x_ratio;
 }
 
@@ -7338,7 +7137,7 @@ void ImGui::SetScrollFromPosY(ImGuiWindow* window, float local_y, float center_y
     IM_ASSERT(center_y_ratio >= 0.0f && center_y_ratio <= 1.0f);
     const float decoration_up_height = window->TitleBarHeight() + window->MenuBarHeight();
     local_y -= decoration_up_height;
-    window->ScrollTarget.y = (float)(int)(local_y + window->Scroll.y);
+    window->ScrollTarget.y = IM_FLOOR(local_y + window->Scroll.y);
     window->ScrollTargetCenterRatio.y = center_y_ratio;
 }
 

3rdparty/dear-imgui/imgui_demo.cpp

@@ -923,7 +923,7 @@ static void ShowDemoWindowWidgets()
         if (ImGui::TreeNode("In columns"))
         {
             ImGui::Columns(3, NULL, false);
-            static bool selected[16] = { 0 };
+            static bool selected[16] = {};
             for (int i = 0; i < 16; i++)
             {
                 char label[32]; sprintf(label, "Item %d", i);
@@ -1075,7 +1075,7 @@ static void ShowDemoWindowWidgets()
 
         // Create a dummy array of contiguous float values to plot
         // Tip: If your float aren't contiguous but part of a structure, you can pass a pointer to your first float and the sizeof() of your structure in the Stride parameter.
-        static float values[90] = { 0 };
+        static float values[90] = {};
         static int values_offset = 0;
         static double refresh_time = 0.0;
         if (!animate || refresh_time == 0.0)
@@ -1176,7 +1176,7 @@ static void ShowDemoWindowWidgets()
 
         // Generate a dummy default palette. The palette will persist and can be edited.
         static bool saved_palette_init = true;
-        static ImVec4 saved_palette[32] = { };
+        static ImVec4 saved_palette[32] = {};
         if (saved_palette_init)
         {
             for (int n = 0; n < IM_ARRAYSIZE(saved_palette); n++)

3rdparty/dear-imgui/imgui_draw.cpp

@@ -2069,7 +2069,7 @@ bool    ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
         const float descent = ImFloor(unscaled_descent * font_scale + ((unscaled_descent > 0.0f) ? +1 : -1));
         ImFontAtlasBuildSetupFont(atlas, dst_font, &cfg, ascent, descent);
         const float font_off_x = cfg.GlyphOffset.x;
-        const float font_off_y = cfg.GlyphOffset.y + (float)(int)(dst_font->Ascent + 0.5f);
+        const float font_off_y = cfg.GlyphOffset.y + ImFloor(dst_font->Ascent + 0.5f);
 
         for (int glyph_i = 0; glyph_i < src_tmp.GlyphsCount; glyph_i++)
         {
@@ -2080,7 +2080,7 @@ bool    ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
             const float char_advance_x_mod = ImClamp(char_advance_x_org, cfg.GlyphMinAdvanceX, cfg.GlyphMaxAdvanceX);
             float char_off_x = font_off_x;
             if (char_advance_x_org != char_advance_x_mod)
-                char_off_x += cfg.PixelSnapH ? (float)(int)((char_advance_x_mod - char_advance_x_org) * 0.5f) : (char_advance_x_mod - char_advance_x_org) * 0.5f;
+                char_off_x += cfg.PixelSnapH ? ImFloor((char_advance_x_mod - char_advance_x_org) * 0.5f) : (char_advance_x_mod - char_advance_x_org) * 0.5f;
 
             // Register glyph
             stbtt_aligned_quad q;
@@ -2591,7 +2591,7 @@ void ImFont::AddGlyph(ImWchar codepoint, float x0, float y0, float x1, float y1,
     glyph.AdvanceX = advance_x + ConfigData->GlyphExtraSpacing.x;  // Bake spacing into AdvanceX
 
     if (ConfigData->PixelSnapH)
-        glyph.AdvanceX = (float)(int)(glyph.AdvanceX + 0.5f);
+        glyph.AdvanceX = IM_FLOOR(glyph.AdvanceX + 0.5f);
 
     // Compute rough surface usage metrics (+1 to account for average padding, +0.99 to round)
     DirtyLookupTables = true;
@@ -2833,8 +2833,8 @@ void ImFont::RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col
     if (const ImFontGlyph* glyph = FindGlyph(c))
     {
         float scale = (size >= 0.0f) ? (size / FontSize) : 1.0f;
-        pos.x = (float)(int)pos.x + DisplayOffset.x;
-        pos.y = (float)(int)pos.y + DisplayOffset.y;
+        pos.x = IM_FLOOR(pos.x + DisplayOffset.x);
+        pos.y = IM_FLOOR(pos.y + DisplayOffset.y);
         draw_list->PrimReserve(6, 4);
         draw_list->PrimRectUV(ImVec2(pos.x + glyph->X0 * scale, pos.y + glyph->Y0 * scale), ImVec2(pos.x + glyph->X1 * scale, pos.y + glyph->Y1 * scale), ImVec2(glyph->U0, glyph->V0), ImVec2(glyph->U1, glyph->V1), col);
     }
@@ -2846,8 +2846,8 @@ void ImFont::RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col
         text_end = text_begin + strlen(text_begin); // ImGui:: functions generally already provides a valid text_end, so this is merely to handle direct calls.
 
     // Align to be pixel perfect
-    pos.x = (float)(int)pos.x + DisplayOffset.x;
-    pos.y = (float)(int)pos.y + DisplayOffset.y;
+    pos.x = IM_FLOOR(pos.x + DisplayOffset.x);
+    pos.y = IM_FLOOR(pos.y + DisplayOffset.y);
     float x = pos.x;
     float y = pos.y;
     if (y > clip_rect.w)

3rdparty/dear-imgui/imgui_internal.h

@@ -144,6 +144,7 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit context pointer
 #define IM_STATIC_ASSERT(_COND)         typedef char static_assertion_##__line__[(_COND)?1:-1]
 #define IM_F32_TO_INT8_UNBOUND(_VAL)    ((int)((_VAL) * 255.0f + ((_VAL)>=0 ? 0.5f : -0.5f)))   // Unsaturated, for display purpose
 #define IM_F32_TO_INT8_SAT(_VAL)        ((int)(ImSaturate(_VAL) * 255.0f + 0.5f))               // Saturated, always output 0..255
+#define IM_FLOOR(_VAL)                  ((float)(int)(_VAL))                                    // ImFloor() is not inlined in MSVC debug builds
 
 // Debug Logging
 #ifndef IMGUI_DEBUG_LOG
@@ -569,7 +570,7 @@ struct IMGUI_API ImRect
     void        TranslateY(float dy)                { Min.y += dy; Max.y += dy; }
     void        ClipWith(const ImRect& r)           { Min = ImMax(Min, r.Min); Max = ImMin(Max, r.Max); }                   // Simple version, may lead to an inverted rectangle, which is fine for Contains/Overlaps test but not for display.
     void        ClipWithFull(const ImRect& r)       { Min = ImClamp(Min, r.Min, r.Max); Max = ImClamp(Max, r.Min, r.Max); } // Full version, ensure both points are fully clipped.
-    void        Floor()                             { Min.x = (float)(int)Min.x; Min.y = (float)(int)Min.y; Max.x = (float)(int)Max.x; Max.y = (float)(int)Max.y; }
+    void        Floor()                             { Min.x = IM_FLOOR(Min.x); Min.y = IM_FLOOR(Min.y); Max.x = IM_FLOOR(Max.x); Max.y = IM_FLOOR(Max.y); }
     bool        IsInverted() const                  { return Min.x > Max.x || Min.y > Max.y; }
 };
 

3rdparty/dear-imgui/imgui_widgets.cpp

@@ -808,7 +808,7 @@ bool ImGui::ScrollbarEx(const ImRect& bb_frame, ImGuiID id, ImGuiAxis axis, floa
     const bool horizontal = (axis == ImGuiAxis_X);
 
     ImRect bb = bb_frame;
-    bb.Expand(ImVec2(-ImClamp((float)(int)((bb_frame_width - 2.0f) * 0.5f), 0.0f, 3.0f), -ImClamp((float)(int)((bb_frame_height - 2.0f) * 0.5f), 0.0f, 3.0f)));
+    bb.Expand(ImVec2(-ImClamp(IM_FLOOR((bb_frame_width - 2.0f) * 0.5f), 0.0f, 3.0f), -ImClamp(IM_FLOOR((bb_frame_height - 2.0f) * 0.5f), 0.0f, 3.0f)));
 
     // V denote the main, longer axis of the scrollbar (= height for a vertical scrollbar)
     const float scrollbar_size_v = horizontal ? bb.GetWidth() : bb.GetHeight();
@@ -851,7 +851,7 @@ bool ImGui::ScrollbarEx(const ImRect& bb_frame, ImGuiID id, ImGuiAxis axis, floa
         // Apply scroll
         // It is ok to modify Scroll here because we are being called in Begin() after the calculation of ContentSize and before setting up our starting position
         const float scroll_v_norm = ImSaturate((clicked_v_norm - g.ScrollbarClickDeltaToGrabCenter - grab_h_norm * 0.5f) / (1.0f - grab_h_norm));
-        *p_scroll_v = (float)(int)(0.5f + scroll_v_norm * scroll_max);//(win_size_contents_v - win_size_v));
+        *p_scroll_v = IM_FLOOR(0.5f + scroll_v_norm * scroll_max);//(win_size_contents_v - win_size_v));
 
         // Update values for rendering
         scroll_ratio = ImSaturate(*p_scroll_v / scroll_max);
@@ -1004,12 +1004,12 @@ bool ImGui::Checkbox(const char* label, bool* v)
     if (window->DC.ItemFlags & ImGuiItemFlags_MixedValue)
     {
         // Undocumented tristate/mixed/indeterminate checkbox (#2644)
-        ImVec2 pad(ImMax(1.0f, (float)(int)(square_sz / 3.6f)), ImMax(1.0f, (float)(int)(square_sz / 3.6f)));
+        ImVec2 pad(ImMax(1.0f, IM_FLOOR(square_sz / 3.6f)), ImMax(1.0f, IM_FLOOR(square_sz / 3.6f)));
         window->DrawList->AddRectFilled(check_bb.Min + pad, check_bb.Max - pad, check_col, style.FrameRounding);
     }
     else if (*v)
     {
-        const float pad = ImMax(1.0f, (float)(int)(square_sz / 6.0f));
+        const float pad = ImMax(1.0f, IM_FLOOR(square_sz / 6.0f));
         RenderCheckMark(check_bb.Min + ImVec2(pad, pad), check_col, square_sz - pad*2.0f);
     }
 
@@ -1057,8 +1057,8 @@ bool ImGui::RadioButton(const char* label, bool active)
         return false;
 
     ImVec2 center = check_bb.GetCenter();
-    center.x = (float)(int)center.x + 0.5f;
-    center.y = (float)(int)center.y + 0.5f;
+    center.x = IM_FLOOR(center.x + 0.5f);
+    center.y = IM_FLOOR(center.y + 0.5f);
     const float radius = (square_sz - 1.0f) * 0.5f;
 
     bool hovered, held;
@@ -1070,7 +1070,7 @@ bool ImGui::RadioButton(const char* label, bool active)
     window->DrawList->AddCircleFilled(center, radius, GetColorU32((held && hovered) ? ImGuiCol_FrameBgActive : hovered ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg), 16);
     if (active)
     {
-        const float pad = ImMax(1.0f, (float)(int)(square_sz / 6.0f));
+        const float pad = ImMax(1.0f, IM_FLOOR(square_sz / 6.0f));
         window->DrawList->AddCircleFilled(center, radius - pad, GetColorU32(ImGuiCol_CheckMark), 16);
     }
 
@@ -4037,9 +4037,9 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
             {
                 const float scroll_increment_x = inner_size.x * 0.25f;
                 if (cursor_offset.x < state->ScrollX)
-                    state->ScrollX = (float)(int)ImMax(0.0f, cursor_offset.x - scroll_increment_x);
+                    state->ScrollX = IM_FLOOR(ImMax(0.0f, cursor_offset.x - scroll_increment_x));
                 else if (cursor_offset.x - inner_size.x >= state->ScrollX)
-                    state->ScrollX = (float)(int)(cursor_offset.x - inner_size.x + scroll_increment_x);
+                    state->ScrollX = IM_FLOOR(cursor_offset.x - inner_size.x + scroll_increment_x);
             }
             else
             {
@@ -4087,7 +4087,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
                 else
                 {
                     ImVec2 rect_size = InputTextCalcTextSizeW(p, text_selected_end, &p, NULL, true);
-                    if (rect_size.x <= 0.0f) rect_size.x = (float)(int)(g.Font->GetCharAdvance((ImWchar)' ') * 0.50f); // So we can see selected empty lines
+                    if (rect_size.x <= 0.0f) rect_size.x = IM_FLOOR(g.Font->GetCharAdvance((ImWchar)' ') * 0.50f); // So we can see selected empty lines
                     ImRect rect(rect_pos + ImVec2(0.0f, bg_offy_up - g.FontSize), rect_pos +ImVec2(rect_size.x, bg_offy_dn));
                     rect.ClipWith(clip_rect);
                     if (rect.Overlaps(clip_rect))
@@ -4254,8 +4254,8 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
     if ((flags & (ImGuiColorEditFlags_DisplayRGB | ImGuiColorEditFlags_DisplayHSV)) != 0 && (flags & ImGuiColorEditFlags_NoInputs) == 0)
     {
         // RGB/HSV 0..255 Sliders
-        const float w_item_one  = ImMax(1.0f, (float)(int)((w_inputs - (style.ItemInnerSpacing.x) * (components-1)) / (float)components));
-        const float w_item_last = ImMax(1.0f, (float)(int)(w_inputs - (w_item_one + style.ItemInnerSpacing.x) * (components-1)));
+        const float w_item_one  = ImMax(1.0f, IM_FLOOR((w_inputs - (style.ItemInnerSpacing.x) * (components-1)) / (float)components));
+        const float w_item_last = ImMax(1.0f, IM_FLOOR(w_inputs - (w_item_one + style.ItemInnerSpacing.x) * (components-1)));
 
         const bool hide_prefix = (w_item_one <= CalcTextSize((flags & ImGuiColorEditFlags_Float) ? "M:0.000" : "M:000").x);
         static const char* ids[4] = { "##X", "##Y", "##Z", "##W" };
@@ -4530,7 +4530,7 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
     float sv_picker_size = ImMax(bars_width * 1, width - (alpha_bar ? 2 : 1) * (bars_width + style.ItemInnerSpacing.x)); // Saturation/Value picking box
     float bar0_pos_x = picker_pos.x + sv_picker_size + style.ItemInnerSpacing.x;
     float bar1_pos_x = bar0_pos_x + bars_width + style.ItemInnerSpacing.x;
-    float bars_triangles_half_sz = (float)(int)(bars_width * 0.20f);
+    float bars_triangles_half_sz = IM_FLOOR(bars_width * 0.20f);
 
     float backup_initial_col[4];
     memcpy(backup_initial_col, col, components * sizeof(float));
@@ -4810,13 +4810,13 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
         draw_list->AddRectFilledMultiColor(picker_pos, picker_pos + ImVec2(sv_picker_size, sv_picker_size), col_white, hue_color32, hue_color32, col_white);
         draw_list->AddRectFilledMultiColor(picker_pos, picker_pos + ImVec2(sv_picker_size, sv_picker_size), 0, 0, col_black, col_black);
         RenderFrameBorder(picker_pos, picker_pos + ImVec2(sv_picker_size, sv_picker_size), 0.0f);
-        sv_cursor_pos.x = ImClamp((float)(int)(picker_pos.x + ImSaturate(S)     * sv_picker_size + 0.5f), picker_pos.x + 2, picker_pos.x + sv_picker_size - 2); // Sneakily prevent the circle to stick out too much
-        sv_cursor_pos.y = ImClamp((float)(int)(picker_pos.y + ImSaturate(1 - V) * sv_picker_size + 0.5f), picker_pos.y + 2, picker_pos.y + sv_picker_size - 2);
+        sv_cursor_pos.x = ImClamp(IM_FLOOR(picker_pos.x + ImSaturate(S)     * sv_picker_size + 0.5f), picker_pos.x + 2, picker_pos.x + sv_picker_size - 2); // Sneakily prevent the circle to stick out too much
+        sv_cursor_pos.y = ImClamp(IM_FLOOR(picker_pos.y + ImSaturate(1 - V) * sv_picker_size + 0.5f), picker_pos.y + 2, picker_pos.y + sv_picker_size - 2);
 
         // Render Hue Bar
         for (int i = 0; i < 6; ++i)
             draw_list->AddRectFilledMultiColor(ImVec2(bar0_pos_x, picker_pos.y + i * (sv_picker_size / 6)), ImVec2(bar0_pos_x + bars_width, picker_pos.y + (i + 1) * (sv_picker_size / 6)), col_hues[i], col_hues[i], col_hues[i + 1], col_hues[i + 1]);
-        float bar0_line_y = (float)(int)(picker_pos.y + H * sv_picker_size + 0.5f);
+        float bar0_line_y = IM_FLOOR(picker_pos.y + H * sv_picker_size + 0.5f);
         RenderFrameBorder(ImVec2(bar0_pos_x, picker_pos.y), ImVec2(bar0_pos_x + bars_width, picker_pos.y + sv_picker_size), 0.0f);
         RenderArrowsForVerticalBar(draw_list, ImVec2(bar0_pos_x - 1, bar0_line_y), ImVec2(bars_triangles_half_sz + 1, bars_triangles_half_sz), bars_width + 2.0f, style.Alpha);
     }
@@ -4834,7 +4834,7 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
         ImRect bar1_bb(bar1_pos_x, picker_pos.y, bar1_pos_x + bars_width, picker_pos.y + sv_picker_size);
         RenderColorRectWithAlphaCheckerboard(bar1_bb.Min, bar1_bb.Max, 0, bar1_bb.GetWidth() / 2.0f, ImVec2(0.0f, 0.0f));
         draw_list->AddRectFilledMultiColor(bar1_bb.Min, bar1_bb.Max, user_col32_striped_of_alpha, user_col32_striped_of_alpha, user_col32_striped_of_alpha & ~IM_COL32_A_MASK, user_col32_striped_of_alpha & ~IM_COL32_A_MASK);
-        float bar1_line_y = (float)(int)(picker_pos.y + (1.0f - alpha) * sv_picker_size + 0.5f);
+        float bar1_line_y = IM_FLOOR(picker_pos.y + (1.0f - alpha) * sv_picker_size + 0.5f);
         RenderFrameBorder(bar1_bb.Min, bar1_bb.Max, 0.0f);
         RenderArrowsForVerticalBar(draw_list, ImVec2(bar1_pos_x - 1, bar1_line_y), ImVec2(bars_triangles_half_sz + 1, bars_triangles_half_sz), bars_width + 2.0f, style.Alpha);
     }
@@ -4891,7 +4891,7 @@ bool ImGui::ColorButton(const char* desc_id, const ImVec4& col, ImGuiColorEditFl
     bb_inner.Expand(off);
     if ((flags & ImGuiColorEditFlags_AlphaPreviewHalf) && col_rgb.w < 1.0f)
     {
-        float mid_x = (float)(int)((bb_inner.Min.x + bb_inner.Max.x) * 0.5f + 0.5f);
+        float mid_x = IM_FLOOR((bb_inner.Min.x + bb_inner.Max.x) * 0.5f + 0.5f);
         RenderColorRectWithAlphaCheckerboard(ImVec2(bb_inner.Min.x + grid_step, bb_inner.Min.y), bb_inner.Max, GetColorU32(col_rgb), grid_step, ImVec2(-grid_step + off, off), rounding, ImDrawCornerFlags_TopRight| ImDrawCornerFlags_BotRight);
         window->DrawList->AddRectFilled(bb_inner.Min, ImVec2(mid_x, bb_inner.Max.y), GetColorU32(col_rgb_without_alpha), rounding, ImDrawCornerFlags_TopLeft|ImDrawCornerFlags_BotLeft);
     }
@@ -5243,8 +5243,8 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
     {
         // Framed header expand a little outside the default padding, to the edge of InnerClipRect
         // (FIXME: May remove this at some point and make InnerClipRect align with WindowPadding.x instead of WindowPadding.x*0.5f)
-        frame_bb.Min.x -= (float)(int)(window->WindowPadding.x * 0.5f - 1.0f);
-        frame_bb.Max.x += (float)(int)(window->WindowPadding.x * 0.5f);
+        frame_bb.Min.x -= IM_FLOOR(window->WindowPadding.x * 0.5f - 1.0f);
+        frame_bb.Max.x += IM_FLOOR(window->WindowPadding.x * 0.5f);
     }
 
     const float text_offset_x = g.FontSize + (display_frame ? padding.x*3 : padding.x*2);               // Collapser arrow width + Spacing
@@ -5257,7 +5257,7 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
     ImRect interact_bb = frame_bb;
     if (!display_frame && (flags & (ImGuiTreeNodeFlags_SpanAvailWidth | ImGuiTreeNodeFlags_SpanFullWidth)) == 0)
         interact_bb.Max.x = frame_bb.Min.x + text_width + style.ItemSpacing.x * 2.0f;
-    
+
     // Store a flag for the current depth to tell if we will allow closing this node when navigating one of its child.
     // For this purpose we essentially compare if g.NavIdIsAlive went from 0 to 1 between TreeNode() and TreePop().
     // This is currently only support 32 level deep and we are fine with (1 << Depth) overflowing into a zero.
@@ -5536,8 +5536,8 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
     // Selectables are tightly packed together so we extend the box to cover spacing between selectable.
     const float spacing_x = style.ItemSpacing.x;
     const float spacing_y = style.ItemSpacing.y;
-    const float spacing_L = (float)(int)(spacing_x * 0.50f);
-    const float spacing_U = (float)(int)(spacing_y * 0.50f);
+    const float spacing_L = IM_FLOOR(spacing_x * 0.50f);
+    const float spacing_U = IM_FLOOR(spacing_y * 0.50f);
     bb.Min.x -= spacing_L;
     bb.Min.y -= spacing_U;
     bb.Max.x += (spacing_x - spacing_L);
@@ -5987,7 +5987,7 @@ void ImGuiMenuColumns::Update(int count, float spacing, bool clear)
     {
         if (i > 0 && NextWidths[i] > 0.0f)
             Width += Spacing;
-        Pos[i] = (float)(int)Width;
+        Pos[i] = IM_FLOOR(Width);
         Width += NextWidths[i];
         NextWidths[i] = 0.0f;
     }
@@ -6144,19 +6144,19 @@ bool ImGui::BeginMenu(const char* label, bool enabled)
         // Menu inside an horizontal menu bar
         // Selectable extend their highlight by half ItemSpacing in each direction.
         // For ChildMenu, the popup position will be overwritten by the call to FindBestWindowPosForPopup() in Begin()
-        popup_pos = ImVec2(pos.x - 1.0f - (float)(int)(style.ItemSpacing.x * 0.5f), pos.y - style.FramePadding.y + window->MenuBarHeight());
-        window->DC.CursorPos.x += (float)(int)(style.ItemSpacing.x * 0.5f);
+        popup_pos = ImVec2(pos.x - 1.0f - IM_FLOOR(style.ItemSpacing.x * 0.5f), pos.y - style.FramePadding.y + window->MenuBarHeight());
+        window->DC.CursorPos.x += IM_FLOOR(style.ItemSpacing.x * 0.5f);
         PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(style.ItemSpacing.x * 2.0f, style.ItemSpacing.y));
         float w = label_size.x;
         pressed = Selectable(label, menu_is_open, ImGuiSelectableFlags_NoHoldingActiveID | ImGuiSelectableFlags_PressedOnClick | ImGuiSelectableFlags_DontClosePopups | (!enabled ? ImGuiSelectableFlags_Disabled : 0), ImVec2(w, 0.0f));
         PopStyleVar();
-        window->DC.CursorPos.x += (float)(int)(style.ItemSpacing.x * (-1.0f + 0.5f)); // -1 spacing to compensate the spacing added when Selectable() did a SameLine(). It would also work to call SameLine() ourselves after the PopStyleVar().
+        window->DC.CursorPos.x += IM_FLOOR(style.ItemSpacing.x * (-1.0f + 0.5f)); // -1 spacing to compensate the spacing added when Selectable() did a SameLine(). It would also work to call SameLine() ourselves after the PopStyleVar().
     }
     else
     {
         // Menu inside a menu
         popup_pos = ImVec2(pos.x, pos.y - style.WindowPadding.y);
-        float w = window->MenuColumns.DeclColumns(label_size.x, 0.0f, (float)(int)(g.FontSize * 1.20f)); // Feedback to next frame
+        float w = window->MenuColumns.DeclColumns(label_size.x, 0.0f, IM_FLOOR(g.FontSize * 1.20f)); // Feedback to next frame
         float extra_w = ImMax(0.0f, GetContentRegionAvail().x - w);
         pressed = Selectable(label, menu_is_open, ImGuiSelectableFlags_NoHoldingActiveID | ImGuiSelectableFlags_PressedOnClick | ImGuiSelectableFlags_DontClosePopups | ImGuiSelectableFlags_DrawFillAvailWidth | (!enabled ? ImGuiSelectableFlags_Disabled : 0), ImVec2(w, 0.0f));
         ImU32 text_col = GetColorU32(enabled ? ImGuiCol_Text : ImGuiCol_TextDisabled);
@@ -6295,16 +6295,16 @@ bool ImGui::MenuItem(const char* label, const char* shortcut, bool selected, boo
         // Mimic the exact layout spacing of BeginMenu() to allow MenuItem() inside a menu bar, which is a little misleading but may be useful
         // Note that in this situation we render neither the shortcut neither the selected tick mark
         float w = label_size.x;
-        window->DC.CursorPos.x += (float)(int)(style.ItemSpacing.x * 0.5f);
+        window->DC.CursorPos.x += IM_FLOOR(style.ItemSpacing.x * 0.5f);
         PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(style.ItemSpacing.x * 2.0f, style.ItemSpacing.y));
         pressed = Selectable(label, false, flags, ImVec2(w, 0.0f));
         PopStyleVar();
-        window->DC.CursorPos.x += (float)(int)(style.ItemSpacing.x * (-1.0f + 0.5f)); // -1 spacing to compensate the spacing added when Selectable() did a SameLine(). It would also work to call SameLine() ourselves after the PopStyleVar().
+        window->DC.CursorPos.x += IM_FLOOR(style.ItemSpacing.x * (-1.0f + 0.5f)); // -1 spacing to compensate the spacing added when Selectable() did a SameLine(). It would also work to call SameLine() ourselves after the PopStyleVar().
     }
     else
     {
         ImVec2 shortcut_size = shortcut ? CalcTextSize(shortcut, NULL) : ImVec2(0.0f, 0.0f);
-        float w = window->MenuColumns.DeclColumns(label_size.x, shortcut_size.x, (float)(int)(g.FontSize * 1.20f)); // Feedback for next frame
+        float w = window->MenuColumns.DeclColumns(label_size.x, shortcut_size.x, IM_FLOOR(g.FontSize * 1.20f)); // Feedback for next frame
         float extra_w = ImMax(0.0f, GetContentRegionAvail().x - w);
         pressed = Selectable(label, false, flags | ImGuiSelectableFlags_DrawFillAvailWidth, ImVec2(w, 0.0f));
         if (shortcut_size.x > 0.0f)
@@ -6598,7 +6598,7 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
         // If we don't have enough room, resize down the largest tabs first
         ShrinkWidths(g.ShrinkWidthBuffer.Data, g.ShrinkWidthBuffer.Size, width_excess);
         for (int tab_n = 0; tab_n < tab_bar->Tabs.Size; tab_n++)
-            tab_bar->Tabs[g.ShrinkWidthBuffer[tab_n].Index].Width = (float)(int)g.ShrinkWidthBuffer[tab_n].Width;
+            tab_bar->Tabs[g.ShrinkWidthBuffer[tab_n].Index].Width = IM_FLOOR(g.ShrinkWidthBuffer[tab_n].Width);
     }
     else
     {
@@ -6999,7 +6999,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
 
     // Layout
     size.x = tab->Width;
-    window->DC.CursorPos = tab_bar->BarRect.Min + ImVec2((float)(int)tab->Offset - tab_bar->ScrollingAnim, 0.0f);
+    window->DC.CursorPos = tab_bar->BarRect.Min + ImVec2(IM_FLOOR(tab->Offset - tab_bar->ScrollingAnim), 0.0f);
     ImVec2 pos = window->DC.CursorPos;
     ImRect bb(pos, pos + size);
 
@@ -7057,7 +7057,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
     if (hovered && g.HoveredIdNotActiveTimer > 0.50f && bb.GetWidth() < tab->WidthContents)
     {
         // Enlarge tab display when hovering
-        bb.Max.x = bb.Min.x + (float)(int)ImLerp(bb.GetWidth(), tab->WidthContents, ImSaturate((g.HoveredIdNotActiveTimer - 0.40f) * 6.0f));
+        bb.Max.x = bb.Min.x + IM_FLOOR(ImLerp(bb.GetWidth(), tab->WidthContents, ImSaturate((g.HoveredIdNotActiveTimer - 0.40f) * 6.0f)));
         display_draw_list = GetForegroundDrawList(window);
         TabItemBackground(display_draw_list, bb, flags, GetColorU32(ImGuiCol_TitleBgActive));
     }
@@ -7167,7 +7167,7 @@ bool ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb,
     if (flags & ImGuiTabItemFlags_UnsavedDocument)
     {
         text_pixel_clip_bb.Max.x -= CalcTextSize(TAB_UNSAVED_MARKER, NULL, false).x;
-        ImVec2 unsaved_marker_pos(ImMin(bb.Min.x + frame_padding.x + label_size.x + 2, text_pixel_clip_bb.Max.x), bb.Min.y + frame_padding.y + (float)(int)(-g.FontSize * 0.25f));
+        ImVec2 unsaved_marker_pos(ImMin(bb.Min.x + frame_padding.x + label_size.x + 2, text_pixel_clip_bb.Max.x), bb.Min.y + frame_padding.y + IM_FLOOR(-g.FontSize * 0.25f));
         RenderTextClippedEx(draw_list, unsaved_marker_pos, bb.Max - frame_padding, TAB_UNSAVED_MARKER, NULL, NULL);
     }
     ImRect text_ellipsis_clip_bb = text_pixel_clip_bb;
@@ -7476,7 +7476,7 @@ void ImGui::BeginColumns(const char* str_id, int columns_count, ImGuiColumnsFlag
     float width = offset_1 - offset_0;
     PushItemWidth(width * 0.65f);
     window->DC.ColumnsOffset.x = ImMax(column_padding - window->WindowPadding.x, 0.0f);
-    window->DC.CursorPos.x = (float)(int)(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
+    window->DC.CursorPos.x = IM_FLOOR(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
     window->WorkRect.Max.x = window->Pos.x + offset_1 - column_padding;
 }
 
@@ -7491,7 +7491,7 @@ void ImGui::NextColumn()
 
     if (columns->Count == 1)
     {
-        window->DC.CursorPos.x = (float)(int)(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
+        window->DC.CursorPos.x = IM_FLOOR(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
         IM_ASSERT(columns->Current == 0);
         return;
     }
@@ -7516,7 +7516,7 @@ void ImGui::NextColumn()
         columns->Current = 0;
         columns->LineMinY = columns->LineMaxY;
     }
-    window->DC.CursorPos.x = (float)(int)(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
+    window->DC.CursorPos.x = IM_FLOOR(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
     window->DC.CursorPos.y = columns->LineMinY;
     window->DC.CurrLineSize = ImVec2(0.0f, 0.0f);
     window->DC.CurrLineTextBaseOffset = 0.0f;
@@ -7583,7 +7583,7 @@ void ImGui::EndColumns()
 
             // Draw column
             const ImU32 col = GetColorU32(held ? ImGuiCol_SeparatorActive : hovered ? ImGuiCol_SeparatorHovered : ImGuiCol_Separator);
-            const float xi = (float)(int)x;
+            const float xi = IM_FLOOR(x);
             window->DrawList->AddLine(ImVec2(xi, y1 + 1.0f), ImVec2(xi, y2), col);
         }
 
@@ -7603,7 +7603,7 @@ void ImGui::EndColumns()
     window->WorkRect = columns->HostWorkRect;
     window->DC.CurrentColumns = NULL;
     window->DC.ColumnsOffset.x = 0.0f;
-    window->DC.CursorPos.x = (float)(int)(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
+    window->DC.CursorPos.x = IM_FLOOR(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
 }
 
 // [2018-03: This is currently the only public API, while we are working on making BeginColumns/EndColumns user-facing]