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diff --git a/src/foolib/imgui/examples/README.txt b/src/foolib/imgui/examples/README.txt new file mode 100644 index 0000000..031a53b --- /dev/null +++ b/src/foolib/imgui/examples/README.txt @@ -0,0 +1,266 @@ +----------------------------------------------------------------------- + dear imgui, v1.73 +----------------------------------------------------------------------- + examples/README.txt + (This is the README file for the examples/ folder. See docs/ for more documentation) +----------------------------------------------------------------------- + +Dear ImGui is highly portable and only requires a few things to run and render: + + - Providing mouse/keyboard inputs + - Uploading the font atlas texture into graphics memory + - Providing a render function to render indexed textured triangles + - Optional: clipboard support, mouse cursor supports, Windows IME support, etc. + +This is essentially what the example bindings in this folder are providing + obligatory portability cruft. + +It is important to understand the difference between the core Dear ImGui library (files in the root folder) +and examples bindings which we are describing here (examples/ folder). +You should be able to write bindings for pretty much any platform and any 3D graphics API. With some extra +effort you can even perform the rendering remotely, on a different machine than the one running the logic. + +This folder contains two things: + + - Example bindings for popular platforms/graphics API, which you can use as is or adapt for your own use. + They are the imgui_impl_XXXX files found in the examples/ folder. + + - Example applications (standalone, ready-to-build) using the aforementioned bindings. + They are the in the XXXX_example/ sub-folders. + +You can find binaries of some of those example applications at: + http://www.dearimgui.org/binaries + + +--------------------------------------- + MISC COMMENTS AND SUGGESTIONS +--------------------------------------- + + - Please read 'PROGRAMMER GUIDE' in imgui.cpp for notes on how to setup Dear ImGui in your codebase. + Please read the comments and instruction at the top of each file. + + - If you are using of the backend provided here, so you can copy the imgui_impl_xxx.cpp/h files + to your project and use them unmodified. Each imgui_impl_xxxx.cpp comes with its own individual + ChangeLog at the top of the .cpp files, so if you want to update them later it will be easier to + catch up with what changed. + + - Dear ImGui has 0 to 1 frame of lag for most behaviors, at 60 FPS your experience should be pleasant. + However, consider that OS mouse cursors are typically drawn through a specific hardware accelerated path + and will feel smoother than common GPU rendered contents (including Dear ImGui windows). + You may experiment with the io.MouseDrawCursor flag to request Dear ImGui to draw a mouse cursor itself, + to visualize the lag between a hardware cursor and a software cursor. However, rendering a mouse cursor + at 60 FPS will feel slow. It might be beneficial to the user experience to switch to a software rendered + cursor only when an interactive drag is in progress. + Note that some setup or GPU drivers are likely to be causing extra lag depending on their settings. + If you feel that dragging windows feels laggy and you are not sure who to blame: try to build an + application drawing a shape directly under the mouse cursor. + + +--------------------------------------- + EXAMPLE BINDINGS +--------------------------------------- + +Most the example bindings are split in 2 parts: + + - The "Platform" bindings, in charge of: mouse/keyboard/gamepad inputs, cursor shape, timing, windowing. + Examples: Windows (imgui_impl_win32.cpp), GLFW (imgui_impl_glfw.cpp), SDL2 (imgui_impl_sdl.cpp) + + - The "Renderer" bindings, in charge of: creating the main font texture, rendering imgui draw data. + Examples: DirectX11 (imgui_impl_dx11.cpp), GL3 (imgui_impl_opengl3.cpp), Vulkan (imgui_impl_vulkan.cpp) + + - The example _applications_ usually combine 1 platform + 1 renderer binding to create a working program. + Examples: the example_win32_directx11/ application combines imgui_impl_win32.cpp + imgui_impl_dx11.cpp. + + - Some bindings for higher level frameworks carry both "Platform" and "Renderer" parts in one file. + This is the case for Allegro 5 (imgui_impl_allegro5.cpp), Marmalade (imgui_impl_marmalade5.cpp). + + - If you use your own engine, you may decide to use some of existing bindings and/or rewrite some using + your own API. As a recommendation, if you are new to Dear ImGui, try using the existing binding as-is + first, before moving on to rewrite some of the code. Although it is tempting to rewrite both of the + imgui_impl_xxxx files to fit under your coding style, consider that it is not necessary! + In fact, if you are new to Dear ImGui, rewriting them will almost always be harder. + + Example: your engine is built over Windows + DirectX11 but you have your own high-level rendering + system layered over DirectX11. + Suggestion: step 1: try using imgui_impl_win32.cpp + imgui_impl_dx11.cpp first. + Once this work, _if_ you want you can replace the imgui_impl_dx11.cpp code with a custom renderer + using your own functions, etc. + Please consider using the bindings to the lower-level platform/graphics API as-is. + + Example: your engine is multi-platform (consoles, phones, etc.), you have high-level systems everywhere. + Suggestion: step 1: try using a non-portable binding first (e.g. win32 + underlying graphics API)! + This is counter-intuitive, but this will get you running faster! Once you better understand how imgui + works and is bound, you can rewrite the code using your own systems. + + - Road-map: Dear ImGui 1.80 (WIP currently in the "docking" branch) will allows imgui windows to be + seamlessly detached from the main application window. This is achieved using an extra layer to the + platform and renderer bindings, which allows Dear ImGui to communicate platform-specific requests. + If you decide to use unmodified imgui_impl_xxxx.cpp files, you will automatically benefit from + improvements and fixes related to viewports and platform windows without extra work on your side. + + +List of Platforms Bindings in this repository: + + imgui_impl_glfw.cpp ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/ + imgui_impl_osx.mm ; macOS native API (not as feature complete as glfw/sdl back-ends) + imgui_impl_sdl.cpp ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org + imgui_impl_win32.cpp ; Win32 native API (Windows) + imgui_impl_glut.cpp ; GLUT/FreeGLUT (absolutely not recommended in 2019) + +List of Renderer Bindings in this repository: + + imgui_impl_dx9.cpp ; DirectX9 + imgui_impl_dx10.cpp ; DirectX10 + imgui_impl_dx11.cpp ; DirectX11 + imgui_impl_dx12.cpp ; DirectX12 + imgui_impl_metal.mm ; Metal (with ObjC) + imgui_impl_opengl2.cpp ; OpenGL 2 (legacy, fixed pipeline <- don't use with modern OpenGL context) + imgui_impl_opengl3.cpp ; OpenGL 3/4, OpenGL ES 2, OpenGL ES 3 (modern programmable pipeline) + imgui_impl_vulkan.cpp ; Vulkan + +List of high-level Frameworks Bindings in this repository: (combine Platform + Renderer) + + imgui_impl_allegro5.cpp + imgui_impl_marmalade.cpp + +Note that Dear ImGui works with Emscripten. +The examples_emscripten/ app uses sdl.cpp + opengl3.cpp but other combinations are possible. +Third-party framework, graphics API and languages bindings are listed at: + + https://github.com/ocornut/imgui/wiki/Bindings + + Languages: C, C#, ChaiScript, D, Go, Haxe, Java, Lua, Odin, Pascal, PureBasic, Python, Rust, Swift... + Frameworks: Cinder, Cocoa (OSX), Cocos2d-x, SFML, GML/GameMaker Studio, Irrlicht, Ogre, OpenSceneGraph, + openFrameworks, LOVE, NanoRT, Nim Game Lib, Qt3d, SFML, Unreal Engine 4... + Miscellaneous: Software Renderer, RemoteImgui, etc. + + +--------------------------------------- + EXAMPLE APPLICATIONS +--------------------------------------- + +Building: + Unfortunately in 2018 it is still tedious to create and maintain portable build files using external + libraries (the kind we're using here to create a window and render 3D triangles) without relying on + third party software. For most examples here I choose to provide: + - Makefiles for Linux/OSX + - Batch files for Visual Studio 2008+ + - A .sln project file for Visual Studio 2010+ + - Xcode project files for the Apple examples + Please let me know if they don't work with your setup! + You can probably just import the imgui_impl_xxx.cpp/.h files into your own codebase or compile those + directly with a command-line compiler. + + +example_allegro5/ + Allegro 5 example. + = main.cpp + imgui_impl_allegro5.cpp + +example_apple_metal/ + OSX & iOS + Metal. + = main.m + imgui_impl_osx.mm + imgui_impl_metal.mm + It is based on the "cross-platform" game template provided with Xcode as of Xcode 9. + (NB: imgui_impl_osx.mm is currently not as feature complete as other platforms back-ends. + You may prefer to use the GLFW Or SDL back-ends, which will also support Windows and Linux.) + +example_apple_opengl2/ + OSX + OpenGL2. + = main.mm + imgui_impl_osx.mm + imgui_impl_opengl2.cpp + (NB: imgui_impl_osx.mm is currently not as feature complete as other platforms back-ends. + You may prefer to use the GLFW Or SDL back-ends, which will also support Windows and Linux.) + +example_empscripten: + Emcripten + SDL2 + OpenGL3+/ES2/ES3 example. + = main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl3.cpp + Note that other examples based on SDL or GLFW + OpenGL could easily be modified to work with Emscripten. + We provide this to make the Emscripten differences obvious, and have them not pollute all other examples. + +example_glfw_metal/ + GLFW (Mac) + Metal example. + = main.mm + imgui_impl_glfw.cpp + imgui_impl_metal.mm. + +example_glfw_opengl2/ + GLFW + OpenGL2 example (legacy, fixed pipeline). + = main.cpp + imgui_impl_glfw.cpp + imgui_impl_opengl2.cpp + **DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)** + **Prefer using OPENGL3 code (with gl3w/glew/glad, you can replace the OpenGL function loader)** + This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter. + If your code is using GL3+ context or any semi modern OpenGL calls, using this renderer is likely to + make things more complicated, will require your code to reset many OpenGL attributes to their initial + state, and might confuse your GPU driver. One star, not recommended. + +example_glfw_opengl3/ + GLFW (Win32, Mac, Linux) + OpenGL3+/ES2/ES3 example (programmable pipeline). + = main.cpp + imgui_impl_glfw.cpp + imgui_impl_opengl3.cpp + This uses more modern OpenGL calls and custom shaders. + Prefer using that if you are using modern OpenGL in your application (anything with shaders). + (Please be mindful that accessing OpenGL3+ functions requires a function loader, which are a frequent + source for confusion for new users. We use a loader in imgui_impl_opengl3.cpp which may be different + from the one your app normally use. Read imgui_impl_opengl3.h for details and how to change it.) + +example_glfw_vulkan/ + GLFW (Win32, Mac, Linux) + Vulkan example. + = main.cpp + imgui_impl_glfw.cpp + imgui_impl_vulkan.cpp + This is quite long and tedious, because: Vulkan. + For this example, the main.cpp file exceptionally use helpers function from imgui_impl_vulkan.h/cpp. + +example_glut_opengl2/ + GLUT (e.g., FreeGLUT on Linux/Windows, GLUT framework on OSX) + OpenGL2. + = main.cpp + imgui_impl_glut.cpp + imgui_impl_opengl2.cpp + Note that GLUT/FreeGLUT is largely obsolete software, prefer using GLFW or SDL. + +example_marmalade/ + Marmalade example using IwGx. + = main.cpp + imgui_impl_marmalade.cpp + +example_null + Null example, compile and link imgui, create context, run headless with no inputs and no graphics output. + = main.cpp + This is used to quickly test compilation of core imgui files in as many setups as possible. + Because this application doesn't create a window nor a graphic context, there's no graphics output. + +example_sdl_directx11/ + SDL2 + DirectX11 example, Windows only. + = main.cpp + imgui_impl_sdl.cpp + imgui_impl_dx11.cpp + This to demonstrate usage of DirectX with SDL. + +example_sdl_opengl2/ + SDL2 (Win32, Mac, Linux etc.) + OpenGL example (legacy, fixed pipeline). + = main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl2.cpp + **DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)** + **Prefer using OPENGL3 code (with gl3w/glew/glad, you can replace the OpenGL function loader)** + This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter. + If your code is using GL3+ context or any semi modern OpenGL calls, using this renderer is likely to + make things more complicated, will require your code to reset many OpenGL attributes to their initial + state, and might confuse your GPU driver. One star, not recommended. + +example_sdl_opengl3/ + SDL2 (Win32, Mac, Linux, etc.) + OpenGL3+/ES2/ES3 example. + = main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl3.cpp + This uses more modern OpenGL calls and custom shaders. + Prefer using that if you are using modern OpenGL in your application (anything with shaders). + (Please be mindful that accessing OpenGL3+ functions requires a function loader, which are a frequent + source for confusion for new users. We use a loader in imgui_impl_opengl3.cpp which may be different + from the one your app normally use. Read imgui_impl_opengl3.h for details and how to change it.) + +example_sdl_vulkan/ + SDL2 (Win32, Mac, Linux, etc.) + Vulkan example. + = main.cpp + imgui_impl_sdl.cpp + imgui_impl_vulkan.cpp + This is quite long and tedious, because: Vulkan. + For this example, the main.cpp file exceptionally use helpers function from imgui_impl_vulkan.h/cpp. + +example_win32_directx9/ + DirectX9 example, Windows only. + = main.cpp + imgui_impl_win32.cpp + imgui_impl_dx9.cpp + +example_win32_directx10/ + DirectX10 example, Windows only. + = main.cpp + imgui_impl_win32.cpp + imgui_impl_dx10.cpp + +example_win32_directx11/ + DirectX11 example, Windows only. + = main.cpp + imgui_impl_win32.cpp + imgui_impl_dx11.cpp + +example_win32_directx12/ + DirectX12 example, Windows only. + = main.cpp + imgui_impl_win32.cpp + imgui_impl_dx12.cpp + This is quite long and tedious, because: DirectX12. |