qmlfrontend/engine_interface.h
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Marry C enums, Qt's metaobject system and QML
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#ifndef ENGINE_H
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#define ENGINE_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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#define ENUM_CLASS enum
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#ifndef Q_NAMESPACE
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#define Q_NAMESPACE
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#endif
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#ifndef Q_ENUM_NS
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#define Q_ENUM_NS(x)
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#endif
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#ifndef Q_DECLARE_METATYPE
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#define Q_DECLARE_METATYPE(x)
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#endif
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namespace Engine {
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extern "C" {
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#else
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#define ENUM_CLASS enum class
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#endif
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typedef struct _EngineInstance EngineInstance;
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typedef struct {
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  uint32_t width;
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  uint32_t height;
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  uint8_t hedgehogs_number;
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  unsigned char* land;
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} PreviewInfo;
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typedef uint32_t hedgewars_engine_protocol_version_t();
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typedef EngineInstance* start_engine_t();
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typedef void generate_preview_t(EngineInstance* engine_state,
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                                PreviewInfo* preview);
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typedef void dispose_preview_t(EngineInstance* engine_state);
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typedef void cleanup_t(EngineInstance* engine_state);
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typedef void send_ipc_t(EngineInstance* engine_state, uint8_t* buf,
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                        size_t size);
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typedef size_t read_ipc_t(EngineInstance* engine_state, uint8_t* buf,
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                          size_t size);
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typedef void setup_current_gl_context_t(EngineInstance* engine_state,
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                                        uint16_t width, uint16_t height,
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                                        void (*(const char*))());
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typedef void render_frame_t(EngineInstance* engine_state);
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typedef bool advance_simulation_t(EngineInstance* engine_state, uint32_t ticks);
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typedef void move_camera_t(EngineInstance* engine_state, int32_t delta_x,
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                           int32_t delta_y);
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ENUM_CLASS SimpleEventType{
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    SwitchHedgehog, Timer, LongJump, HighJump, Accept, Deny,
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};
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ENUM_CLASS LongEventType{
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    ArrowUp, ArrowDown, ArrowLeft, ArrowRight, Precision, Attack,
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};
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ENUM_CLASS LongEventState{
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    Set,
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    Unset,
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};
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ENUM_CLASS PositionedEventType{
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    CursorMove,
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    CursorClick,
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};
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typedef void simple_event_t(EngineInstance* engine_state,
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                            SimpleEventType event_type);
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typedef void long_event_t(EngineInstance* engine_state,
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                          LongEventType event_type, LongEventState state);
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typedef void positioned_event_t(EngineInstance* engine_state,
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                                PositionedEventType event_type, int32_t x,
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                                int32_t y);
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}  // extern "C"
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#ifdef __cplusplus
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Q_NAMESPACE
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Q_ENUM_NS(SimpleEventType)
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Q_ENUM_NS(LongEventType)
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Q_ENUM_NS(LongEventState)
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Q_ENUM_NS(PositionedEventType)
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};  // namespace
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Q_DECLARE_METATYPE(Engine::SimpleEventType)
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Q_DECLARE_METATYPE(Engine::LongEventType)
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Q_DECLARE_METATYPE(Engine::LongEventState)
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Q_DECLARE_METATYPE(Engine::PositionedEventType)
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#endif
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#endif  // ENGINE_H