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36 lines
1.5 KiB
Markdown
36 lines
1.5 KiB
Markdown
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# Configuration
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Dear ImGui outputs 16-bit vertex indices by default.
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Allegro doesn't support them natively, so we have two solutions: convert the indices manually in imgui_impl_allegro5.cpp, or compile dear imgui with 32-bit indices.
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You can either modify imconfig.h that comes with Dear ImGui (easier), or set a C++ preprocessor option IMGUI_USER_CONFIG to find to a filename.
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We are providing `imconfig_allegro5.h` that enables 32-bit indices.
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Note that the backend supports _BOTH_ 16-bit and 32-bit indices, but 32-bit indices will be slightly faster as they won't require a manual conversion.
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# How to Build
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### On Ubuntu 14.04+ and macOS
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```bash
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g++ -DIMGUI_USER_CONFIG=\"examples/example_allegro5/imconfig_allegro5.h\" -I .. -I ../.. main.cpp ../../backends/imgui_impl_allegro5.cpp ../../imgui*.cpp -lallegro -lallegro_main -lallegro_primitives -o allegro5_example
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```
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On macOS, install Allegro with homebrew: `brew install allegro`.
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### On Windows with Visual Studio's CLI
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You may install Allegro using vcpkg:
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```
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git clone https://github.com/Microsoft/vcpkg
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cd vcpkg
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.\bootstrap-vcpkg.bat
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.\vcpkg install allegro5
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.\vcpkg integrate install ; optional, automatically register include/libs in Visual Studio
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```
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Build:
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```
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set ALLEGRODIR=path_to_your_allegro5_folder
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cl /Zi /MD /I %ALLEGRODIR%\include /DIMGUI_USER_CONFIG=\"examples/example_allegro5/imconfig_allegro5.h\" /I .. /I ..\.. main.cpp ..\..\backends\imgui_impl_allegro5.cpp ..\..\imgui*.cpp /link /LIBPATH:%ALLEGRODIR%\lib allegro-5.0.10-monolith-md.lib user32.lib
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```
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