imconfig.h - external/github.com/ocornut/imgui - Git at Google

 //-----------------------------------------------------------------------------
 // COMPILE-TIME OPTIONS FOR DEAR IMGUI
 // Runtime options (clipboard callbacks, enabling various features, etc.) can generally be set via the ImGuiIO structure.
 // You can use ImGui::SetAllocatorFunctions() before calling ImGui::CreateContext() to rewire memory allocation functions.
 //-----------------------------------------------------------------------------
 // A) You may edit imconfig.h (and not overwrite it when updating Dear ImGui, or maintain a patch/branch with your modifications to imconfig.h)
 // B) or add configuration directives in your own file and compile with #define IMGUI_USER_CONFIG "myfilename.h"
 // If you do so you need to make sure that configuration settings are defined consistently _everywhere_ Dear ImGui is used, which include
 // the imgui*.cpp files but also _any_ of your code that uses Dear ImGui. This is because some compile-time options have an affect on data structures.
 // Defining those options in imconfig.h will ensure every compilation unit gets to see the same data structure layouts.
 // Call IMGUI_CHECKVERSION() from your .cpp files to verify that the data structures your files are using are matching the ones imgui.cpp is using.
 //-----------------------------------------------------------------------------

 #pragma once

 //---- Define assertion handler. Defaults to calling assert().
 //#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
 //#define IM_ASSERT(_EXPR)  ((void)(_EXPR))     // Disable asserts

 //---- 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.
 //#define IMGUI_API __declspec( dllexport )
 //#define IMGUI_API __declspec( dllimport )

 //---- Don't define obsolete functions/enums names. Consider enabling from time to time after updating to avoid using soon-to-be obsolete function/names.
 //#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS

 //---- Don't implement demo windows functionality (ShowDemoWindow()/ShowStyleEditor()/ShowUserGuide() methods will be empty)
 // It is very strongly recommended to NOT disable the demo windows during development. Please read the comments in imgui_demo.cpp.
 //#define IMGUI_DISABLE_DEMO_WINDOWS
 //#define IMGUI_DISABLE_METRICS_WINDOW

 //---- Don't implement some functions to reduce linkage requirements.
 //#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS   // [Win32] Don't implement default clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc.
 //#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS         // [Win32] Don't implement default IME handler. Won't use and link with ImmGetContext/ImmSetCompositionWindow.
 //#define IMGUI_DISABLE_WIN32_FUNCTIONS                     // [Win32] Won't use and link with any Win32 function (clipboard, ime).
 //#define IMGUI_ENABLE_OSX_DEFAULT_CLIPBOARD_FUNCTIONS      // [OSX] Implement default OSX clipboard handler (need to link with '-framework ApplicationServices', this is why this is not the default).
 //#define IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS            // Don't implement ImFormatString/ImFormatStringV so you can implement them yourself (e.g. if you don't want to link with vsnprintf)
 //#define IMGUI_DISABLE_DEFAULT_MATH_FUNCTIONS              // Don't implement ImFabs/ImSqrt/ImPow/ImFmod/ImCos/ImSin/ImAcos/ImAtan2 so you can implement them yourself.
 //#define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS              // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite so you can implement them yourself if you don't want to link with fopen/fclose/fread/fwrite. This will also disable the LogToTTY() function.
 //#define IMGUI_DISABLE_DEFAULT_ALLOCATORS                  // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().

 //---- Include imgui_user.h at the end of imgui.h as a convenience
 //#define IMGUI_INCLUDE_IMGUI_USER_H

 //---- Pack colors to BGRA8 instead of RGBA8 (to avoid converting from one to another)
 //#define IMGUI_USE_BGRA_PACKED_COLOR

 //---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
 // By default the embedded implementations are declared static and not available outside of imgui cpp files.
 //#define IMGUI_STB_TRUETYPE_FILENAME   "my_folder/stb_truetype.h"
 //#define IMGUI_STB_RECT_PACK_FILENAME  "my_folder/stb_rect_pack.h"
 //#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
 //#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION

 //---- Define constructor and implicit cast operators to convert back<>forth between your math types and ImVec2/ImVec4.
 // This will be inlined as part of ImVec2 and ImVec4 class declarations.
 /*
 #define IM_VEC2_CLASS_EXTRA                                                 \
         ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \
         operator MyVec2() const { return MyVec2(x,y); }

 #define IM_VEC4_CLASS_EXTRA                                                 \
         ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; }     \
         operator MyVec4() const { return MyVec4(x,y,z,w); }
 */

 //---- Using 32-bits vertex indices (default is 16-bits) is one way to allow large meshes with more than 64K vertices.
 // Your renderer back-end will need to support it (most example renderer back-ends support both 16/32-bits indices).
 // Another way to allow large meshes while keeping 16-bits indices is to handle ImDrawCmd::VtxOffset in your renderer.
 // Read about ImGuiBackendFlags_RendererHasVtxOffset for details.
 //#define ImDrawIdx unsigned int

 //---- Override ImDrawCallback signature (will need to modify renderer back-ends accordingly)
 //struct ImDrawList;
 //struct ImDrawCmd;
 //typedef void (*MyImDrawCallback)(const ImDrawList* draw_list, const ImDrawCmd* cmd, void* my_renderer_user_data);
 //#define ImDrawCallback MyImDrawCallback

 //---- Debug Tools
 // Use 'Metrics->Tools->Item Picker' to pick widgets with the mouse and break into them for easy debugging.
 //#define IM_DEBUG_BREAK  IM_ASSERT(0)
 //#define IM_DEBUG_BREAK  __debugbreak()
 // Have the Item Picker break in the ItemAdd() function instead of ItemHoverable() - which is earlier in the code, will catch a few extra items, allow picking items other than Hovered one.
 // This adds a small runtime cost which is why it is not enabled by default.
 //#define IMGUI_DEBUG_TOOL_ITEM_PICKER_EX

 //---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers files.
 /*
 namespace ImGui
 {
     void MyFunction(const char* name, const MyMatrix44& v);
 }
 */
	//-----------------------------------------------------------------------------
	// COMPILE-TIME OPTIONS FOR DEAR IMGUI
	// Runtime options (clipboard callbacks, enabling various features, etc.) can generally be set via the ImGuiIO structure.
	// You can use ImGui::SetAllocatorFunctions() before calling ImGui::CreateContext() to rewire memory allocation functions.
	//-----------------------------------------------------------------------------
	// A) You may edit imconfig.h (and not overwrite it when updating Dear ImGui, or maintain a patch/branch with your modifications to imconfig.h)
	// B) or add configuration directives in your own file and compile with #define IMGUI_USER_CONFIG "myfilename.h"
	// If you do so you need to make sure that configuration settings are defined consistently _everywhere_ Dear ImGui is used, which include
	// the imgui*.cpp files but also _any_ of your code that uses Dear ImGui. This is because some compile-time options have an affect on data structures.
	// Defining those options in imconfig.h will ensure every compilation unit gets to see the same data structure layouts.
	// Call IMGUI_CHECKVERSION() from your .cpp files to verify that the data structures your files are using are matching the ones imgui.cpp is using.
	//-----------------------------------------------------------------------------

	#pragma once

	//---- Define assertion handler. Defaults to calling assert().
	//#define IM_ASSERT(_EXPR) MyAssert(_EXPR)
	//#define IM_ASSERT(_EXPR) ((void)(_EXPR)) // Disable asserts

	//---- 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.
	//#define IMGUI_API __declspec( dllexport )
	//#define IMGUI_API __declspec( dllimport )

	//---- Don't define obsolete functions/enums names. Consider enabling from time to time after updating to avoid using soon-to-be obsolete function/names.
	//#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS

	//---- Don't implement demo windows functionality (ShowDemoWindow()/ShowStyleEditor()/ShowUserGuide() methods will be empty)
	// It is very strongly recommended to NOT disable the demo windows during development. Please read the comments in imgui_demo.cpp.
	//#define IMGUI_DISABLE_DEMO_WINDOWS
	//#define IMGUI_DISABLE_METRICS_WINDOW

	//---- Don't implement some functions to reduce linkage requirements.
	//#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS // [Win32] Don't implement default clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc.
	//#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS // [Win32] Don't implement default IME handler. Won't use and link with ImmGetContext/ImmSetCompositionWindow.
	//#define IMGUI_DISABLE_WIN32_FUNCTIONS // [Win32] Won't use and link with any Win32 function (clipboard, ime).
	//#define IMGUI_ENABLE_OSX_DEFAULT_CLIPBOARD_FUNCTIONS // [OSX] Implement default OSX clipboard handler (need to link with '-framework ApplicationServices', this is why this is not the default).
	//#define IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS // Don't implement ImFormatString/ImFormatStringV so you can implement them yourself (e.g. if you don't want to link with vsnprintf)
	//#define IMGUI_DISABLE_DEFAULT_MATH_FUNCTIONS // Don't implement ImFabs/ImSqrt/ImPow/ImFmod/ImCos/ImSin/ImAcos/ImAtan2 so you can implement them yourself.
	//#define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite so you can implement them yourself if you don't want to link with fopen/fclose/fread/fwrite. This will also disable the LogToTTY() function.
	//#define IMGUI_DISABLE_DEFAULT_ALLOCATORS // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().

	//---- Include imgui_user.h at the end of imgui.h as a convenience
	//#define IMGUI_INCLUDE_IMGUI_USER_H

	//---- Pack colors to BGRA8 instead of RGBA8 (to avoid converting from one to another)
	//#define IMGUI_USE_BGRA_PACKED_COLOR

	//---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
	// By default the embedded implementations are declared static and not available outside of imgui cpp files.
	//#define IMGUI_STB_TRUETYPE_FILENAME "my_folder/stb_truetype.h"
	//#define IMGUI_STB_RECT_PACK_FILENAME "my_folder/stb_rect_pack.h"
	//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
	//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION

	//---- Define constructor and implicit cast operators to convert back<>forth between your math types and ImVec2/ImVec4.
	// This will be inlined as part of ImVec2 and ImVec4 class declarations.
	/*
	#define IM_VEC2_CLASS_EXTRA \
	ImVec2(const MyVec2& f) { x = f.x; y = f.y; } \
	operator MyVec2() const { return MyVec2(x,y); }

	#define IM_VEC4_CLASS_EXTRA \
	ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; } \
	operator MyVec4() const { return MyVec4(x,y,z,w); }
	*/

	//---- Using 32-bits vertex indices (default is 16-bits) is one way to allow large meshes with more than 64K vertices.
	// Your renderer back-end will need to support it (most example renderer back-ends support both 16/32-bits indices).
	// Another way to allow large meshes while keeping 16-bits indices is to handle ImDrawCmd::VtxOffset in your renderer.
	// Read about ImGuiBackendFlags_RendererHasVtxOffset for details.
	//#define ImDrawIdx unsigned int

	//---- Override ImDrawCallback signature (will need to modify renderer back-ends accordingly)
	//struct ImDrawList;
	//struct ImDrawCmd;
	//typedef void (MyImDrawCallback)(const ImDrawList draw_list, const ImDrawCmd* cmd, void* my_renderer_user_data);
	//#define ImDrawCallback MyImDrawCallback

	//---- Debug Tools
	// Use 'Metrics->Tools->Item Picker' to pick widgets with the mouse and break into them for easy debugging.
	//#define IM_DEBUG_BREAK IM_ASSERT(0)
	//#define IM_DEBUG_BREAK __debugbreak()
	// Have the Item Picker break in the ItemAdd() function instead of ItemHoverable() - which is earlier in the code, will catch a few extra items, allow picking items other than Hovered one.
	// This adds a small runtime cost which is why it is not enabled by default.
	//#define IMGUI_DEBUG_TOOL_ITEM_PICKER_EX

	//---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers files.
	/*
	namespace ImGui
	{
	void MyFunction(const char* name, const MyMatrix44& v);
	}
	*/