29 lines
853 B
CMake
29 lines
853 B
CMake
if (MLN_LEGACY_RENDERER)
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message(FATAL "The legacy renderer is no longer supported")
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endif()
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if (MLN_DRAWABLE_RENDERER)
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message(FATAL "Do not pass MLN_DRAWABLE_RENDERER, the drawable renderer is now the default")
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endif()
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set(backend_count 0)
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if (MLN_WITH_OPENGL)
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math(EXPR backend_count "${backend_count} + 1")
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endif()
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if (MLN_WITH_METAL)
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math(EXPR backend_count "${backend_count} + 1")
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endif()
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if (MLN_WITH_VULKAN)
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math(EXPR backend_count "${backend_count} + 1")
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endif()
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if (backend_count EQUAL 0)
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message(FATAL_ERROR
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"You need to set a rendering backend. "
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"Set exactly one of: MLN_WITH_OPENGL, MLN_WITH_METAL, or MLN_WITH_VULKAN.")
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elseif (backend_count GREATER 1)
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message(FATAL_ERROR
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"Multiple rendering backends selected. "
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"Please enable only one of: MLN_WITH_OPENGL, MLN_WITH_METAL, or MLN_WITH_VULKAN.")
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endif()
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