//---- Define attributes of all API symbols declarations, e.g. for DLL under Windows
// Using dear imgui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
// Using Dear ImGui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
// DLL users: heaps and globals are not shared across DLL boundaries! You will need to call SetCurrentContext() + SetAllocatorFunctions()
// for each static/DLL boundary you are calling from. Read "Context and Memory Allocators" section of imgui.cpp for more details.
// - Heaps and globals are not shared across DLL boundaries!
// - You will need to call SetCurrentContext() + SetAllocatorFunctions() for each static/DLL boundary you are calling from.
// - Same apply for hot-reloading mechanisms that are reliant on reloading DLL (note that many hot-reloading mechanism works without DLL).
// - Using Dear ImGui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
// - Confused? In a debugger: add GImGui to your watch window and notice how its value changes depending on your current location (which DLL boundary you are in).
// Current context pointer. Implicitly used by all Dear ImGui functions. Always assumed to be != NULL.
// ImGui::CreateContext() will automatically set this pointer if it is NULL. Change to a different context by calling ImGui::SetCurrentContext().
// 1) Important: globals are not shared across DLL boundaries! If you use DLLs or any form of hot-reloading: you will need to call
// SetCurrentContext() (with the pointer you got from CreateContext) from each unique static/DLL boundary, and after each hot-reloading.
// In your debugger, add GImGui to your watch window and notice how its value changes depending on which location you are currently stepping into.
// 2) Important: Dear ImGui functions are not thread-safe because of this pointer.
// If you want thread-safety to allow N threads to access N different contexts, you can:
// - Change this variable to use thread local storage so each thread can refer to a different context, in imconfig.h:
// struct ImGuiContext;
// extern thread_local ImGuiContext* MyImGuiTLS;
// #define GImGui MyImGuiTLS
// And then define MyImGuiTLS in one of your cpp file. Note that thread_local is a C++11 keyword, earlier C++ uses compiler-specific keyword.
// - Future development aim to make this context pointer explicit to all calls. Also read https://github.com/ocornut/imgui/issues/586
// - If you need a finite number of contexts, you may compile and use multiple instances of the ImGui code from different namespace.
// - ImGui::CreateContext() will automatically set this pointer if it is NULL.
// Change to a different context by calling ImGui::SetCurrentContext().
// - Important: Dear ImGui functions are not thread-safe because of this pointer.
// If you want thread-safety to allow N threads to access N different contexts:
// - Change this variable to use thread local storage so each thread can refer to a different context, in your imconfig.h:
// struct ImGuiContext;
// extern thread_local ImGuiContext* MyImGuiTLS;
// #define GImGui MyImGuiTLS
// And then define MyImGuiTLS in one of your cpp file. Note that thread_local is a C++11 keyword, earlier C++ uses compiler-specific keyword.
// - Future development aim to make this context pointer explicit to all calls. Also read https://github.com/ocornut/imgui/issues/586
// - If you need a finite number of contexts, you may compile and use multiple instances of the ImGui code from different namespace.
// - DLL users: read comments above.
#ifndef GImGui
ImGuiContext*GImGui=NULL;
#endif
// Memory Allocator functions. Use SetAllocatorFunctions() to change them.
// If you use DLL hotreloading you might need to call SetAllocatorFunctions() after reloading code from this file.
// Otherwise, you probably don't want to modify them mid-program, and if you use global/static e.g. ImVector<> instances you may need to keep them accessible during program destruction.
// - You probably don't want to modify those mid-program, and if you use global/static e.g. ImVector<> instances you may need to keep them accessible during program destruction.
// This is provided to facilitate copying allocators from one static/DLL boundary to another (e.g. retrieve default allocator of your executable address space)
@ -193,6 +193,8 @@ typedef void* ImTextureID; // User data for rendering backend to identi
typedefunsignedintImGuiID;// A unique ID used by widgets, typically hashed from a stack of string.
typedefint(*ImGuiInputTextCallback)(ImGuiInputTextCallbackData*data);// Callback function for ImGui::InputText()
typedefvoid(*ImGuiSizeCallback)(ImGuiSizeCallbackData*data);// Callback function for ImGui::SetNextWindowSizeConstraints()
typedefvoid*(ImGuiMemAllocFunc)(size_tsz,void*user_data);// Function signature for ImGui::SetAllocatorFunctions()
typedefvoid(ImGuiMemFreeFunc)(void*ptr,void*user_data);// Function signature for ImGui::SetAllocatorFunctions()
// Character types
// (we generally use UTF-8 encoded string in the API. This is storage specifically for a decoded character used for keyboard input and display)
@ -255,8 +257,9 @@ struct ImVec4
namespaceImGui
{
// Context creation and access
// Each context create its own ImFontAtlas by default. You may instance one yourself and pass it to CreateContext() to share a font atlas between imgui contexts.
// None of those functions is reliant on the current context.
// - Each context create its own ImFontAtlas by default. You may instance one yourself and pass it to CreateContext() to share a font atlas between contexts.
// - DLL users: heaps and globals are not shared across DLL boundaries! You will need to call SetCurrentContext() + SetAllocatorFunctions()
// for each static/DLL boundary you are calling from. Read "Context and Memory Allocators" section of imgui.cpp for details.
IMGUI_APIvoidDestroyContext(ImGuiContext*ctx=NULL);// NULL = destroy current context
IMGUI_APIImGuiContext*GetCurrentContext();
@ -868,9 +871,11 @@ namespace ImGui
IMGUI_APIboolDebugCheckVersionAndDataLayout(constchar*version_str,size_tsz_io,size_tsz_style,size_tsz_vec2,size_tsz_vec4,size_tsz_drawvert,size_tsz_drawidx);// This is called by IMGUI_CHECKVERSION() macro.
// Memory Allocators
// - 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 because we use global storage for those.
ocornut
4 years ago