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Each backend becomes its own module that imports 'imgui' and includes its header and source in the purview. Do the same preparation as for the core: - Skip system, platform and graphics API includes under IMGUI_CXX_MODULE, because the module includes them in its global module fragment. - Skip the forward declarations of platform types (GLFWwindow, SDL_Window, ID3D11Device...). Declared in the purview, they would be new types attached to the backend module instead of the real ones. For the same reason, sdl2 drops the elaborated 'struct _SDL_GameController'. - Wrap each header's API in IMGUI_EXPORT_BEGIN/END. - win32: export ImGui_ImplWin32_WndProcHandler() under IMGUI_CXX_MODULE. The header keeps it commented out to avoid pulling in <windows.h>, but a module user can't forward-declare it themselves. - glfw: skip the local GetIO(ImGuiContext*) declaration, because 'imgui' exports it.
37 lines
1.6 KiB
C
37 lines
1.6 KiB
C
// dear imgui: Null Platform+Renderer Backends
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// This is designed if you need to use a blind Dear Imgui context with no input and no output.
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
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// Learn about Dear ImGui:
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// - FAQ https://dearimgui.com/faq
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// - Getting Started https://dearimgui.com/getting-started
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// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
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// - Introduction, links and more at the top of imgui.cpp
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#pragma once
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#include "imgui.h" // IMGUI_IMPL_API
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#ifndef IMGUI_DISABLE
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IMGUI_EXPORT_BEGIN
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// Follow "Getting Started" link and check examples/ folder to learn about using backends!
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// Null = NullPlatform + NullRender
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IMGUI_IMPL_API bool ImGui_ImplNull_Init();
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IMGUI_IMPL_API void ImGui_ImplNull_Shutdown();
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IMGUI_IMPL_API void ImGui_ImplNull_NewFrame();
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// Null platform only (single screen, fixed timestep, no inputs)
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IMGUI_IMPL_API bool ImGui_ImplNullPlatform_Init();
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IMGUI_IMPL_API void ImGui_ImplNullPlatform_Shutdown();
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IMGUI_IMPL_API void ImGui_ImplNullPlatform_NewFrame();
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// Null renderer only (no output)
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IMGUI_IMPL_API bool ImGui_ImplNullRender_Init();
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IMGUI_IMPL_API void ImGui_ImplNullRender_Shutdown();
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IMGUI_IMPL_API void ImGui_ImplNullRender_NewFrame();
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IMGUI_IMPL_API void ImGui_ImplNullRender_RenderDrawData(ImDrawData* draw_data);
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IMGUI_EXPORT_END
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#endif // #ifndef IMGUI_DISABLE
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