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generated with IMGUI_DOCKING addition.

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This commit is contained in:
Victor Bombi
2020-02-28 10:49:35 +01:00
parent 9bed5f29a9
commit db0243a6f0
2 changed files with 118 additions and 0 deletions
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59
cimgui.cpp
View File

@@ -2550,3 +2550,62 @@ CIMGUI_API void ImVector_ImWchar_UnInit(ImVector_ImWchar* p)
p->~ImVector<ImWchar>(); p->~ImVector<ImWchar>();
} }
#ifdef IMGUI_DOCKING
// NOTE: Some function pointers in the ImGuiPlatformIO structure are not C-compatible because of their
// use of a complex return type. To work around this, we store a custom CimguiStorage object inside
// ImGuiIO::BackendLanguageUserData, which contains C-compatible function pointer variants for these
// functions. When a user function pointer is provided, we hook up the underlying ImGuiPlatformIO
// function pointer to a thunk which accesses the user function pointer through CimguiStorage.
struct CimguiStorage
{
void(*Platform_GetWindowPos)(ImGuiViewport* vp, ImVec2* out_pos);
void(*Platform_GetWindowSize)(ImGuiViewport* vp, ImVec2* out_pos);
};
// Gets a reference to the CimguiStorage object stored in the current ImGui context's BackendLanguageUserData.
CimguiStorage& GetCimguiStorage()
{
ImGuiIO& io = ImGui::GetIO();
if (io.BackendLanguageUserData == NULL)
{
io.BackendLanguageUserData = new CimguiStorage();
}
return *(CimguiStorage*)io.BackendLanguageUserData;
}
// Thunk satisfying the signature of ImGuiPlatformIO::Platform_GetWindowPos.
ImVec2 Platform_GetWindowPos_hook(ImGuiViewport* vp)
{
ImVec2 pos;
GetCimguiStorage().Platform_GetWindowPos(vp, &pos);
return pos;
};
// Fully C-compatible function pointer setter for ImGuiPlatformIO::Platform_GetWindowPos.
CIMGUI_API void ImGuiPlatformIO_Set_Platform_GetWindowPos(ImGuiPlatformIO* platform_io, void(*user_callback)(ImGuiViewport* vp, ImVec2* out_pos))
{
CimguiStorage& storage = GetCimguiStorage();
storage.Platform_GetWindowPos = user_callback;
platform_io->Platform_GetWindowPos = &Platform_GetWindowPos_hook;
}
// Thunk satisfying the signature of ImGuiPlatformIO::Platform_GetWindowSize.
ImVec2 Platform_GetWindowSize_hook(ImGuiViewport* vp)
{
ImVec2 size;
GetCimguiStorage().Platform_GetWindowSize(vp, &size);
return size;
};
// Fully C-compatible function pointer setter for ImGuiPlatformIO::Platform_GetWindowSize.
CIMGUI_API void ImGuiPlatformIO_Set_Platform_GetWindowSize(ImGuiPlatformIO* platform_io, void(*user_callback)(ImGuiViewport* vp, ImVec2* out_size))
{
CimguiStorage& storage = GetCimguiStorage();
storage.Platform_GetWindowSize = user_callback;
platform_io->Platform_GetWindowSize = &Platform_GetWindowSize_hook;
}
#endif

59
generator/output/cimgui.cpp
View File

@@ -2550,3 +2550,62 @@ CIMGUI_API void ImVector_ImWchar_UnInit(ImVector_ImWchar* p)
p->~ImVector<ImWchar>(); p->~ImVector<ImWchar>();
} }
#ifdef IMGUI_DOCKING
// NOTE: Some function pointers in the ImGuiPlatformIO structure are not C-compatible because of their
// use of a complex return type. To work around this, we store a custom CimguiStorage object inside
// ImGuiIO::BackendLanguageUserData, which contains C-compatible function pointer variants for these
// functions. When a user function pointer is provided, we hook up the underlying ImGuiPlatformIO
// function pointer to a thunk which accesses the user function pointer through CimguiStorage.
struct CimguiStorage
{
void(*Platform_GetWindowPos)(ImGuiViewport* vp, ImVec2* out_pos);
void(*Platform_GetWindowSize)(ImGuiViewport* vp, ImVec2* out_pos);
};
// Gets a reference to the CimguiStorage object stored in the current ImGui context's BackendLanguageUserData.
CimguiStorage& GetCimguiStorage()
{
ImGuiIO& io = ImGui::GetIO();
if (io.BackendLanguageUserData == NULL)
{
io.BackendLanguageUserData = new CimguiStorage();
}
return *(CimguiStorage*)io.BackendLanguageUserData;
}
// Thunk satisfying the signature of ImGuiPlatformIO::Platform_GetWindowPos.
ImVec2 Platform_GetWindowPos_hook(ImGuiViewport* vp)
{
ImVec2 pos;
GetCimguiStorage().Platform_GetWindowPos(vp, &pos);
return pos;
};
// Fully C-compatible function pointer setter for ImGuiPlatformIO::Platform_GetWindowPos.
CIMGUI_API void ImGuiPlatformIO_Set_Platform_GetWindowPos(ImGuiPlatformIO* platform_io, void(*user_callback)(ImGuiViewport* vp, ImVec2* out_pos))
{
CimguiStorage& storage = GetCimguiStorage();
storage.Platform_GetWindowPos = user_callback;
platform_io->Platform_GetWindowPos = &Platform_GetWindowPos_hook;
}
// Thunk satisfying the signature of ImGuiPlatformIO::Platform_GetWindowSize.
ImVec2 Platform_GetWindowSize_hook(ImGuiViewport* vp)
{
ImVec2 size;
GetCimguiStorage().Platform_GetWindowSize(vp, &size);
return size;
};
// Fully C-compatible function pointer setter for ImGuiPlatformIO::Platform_GetWindowSize.
CIMGUI_API void ImGuiPlatformIO_Set_Platform_GetWindowSize(ImGuiPlatformIO* platform_io, void(*user_callback)(ImGuiViewport* vp, ImVec2* out_size))
{
CimguiStorage& storage = GetCimguiStorage();
storage.Platform_GetWindowSize = user_callback;
platform_io->Platform_GetWindowSize = &Platform_GetWindowSize_hook;
}
#endif