mirror of https://github.com/nmlgc/ReC98.git
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
/// TRAM text overlaid on top of the playfield
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/// -------------------------------------------
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/// Quite an awkward micro-optimization: The two overlay function pointers are
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/// `near`, despite the fact that we also have to set them from outside the
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/// group where the target functions are defined in. The only known way of
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/// achieving this in Turbo C++ 4.0J involves lying to the compiler about the
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/// true distance of the function. That's also why we can't correctly declare
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/// some of the target functions at global scope.
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#define set_nearfunc_ptr_to_farfunc(ptr, func) { \
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void pascal far func(void); \
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ptr = reinterpret_cast<nearfunc_t_near>(func); \
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}
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extern nearfunc_t_near overlay1; // Rendered first
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extern nearfunc_t_near overlay2; // Rendered second
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// Fills the playfield area on the text RAM with transparent spaces.
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void near overlay_wipe(void);
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// Fills the playfield area on the text RAM with black, effectively hiding the
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// playfield in the process.
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void near overlay_black(void);
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// Stage transitions
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// -----------------
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#ifdef OVERLAY_FADE_CELS
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static const int OVERLAY_FADE_INTERVAL = 8;
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static const int OVERLAY_FADE_DURATION = (
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(OVERLAY_FADE_CELS + 1) * OVERLAY_FADE_INTERVAL
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);
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#endif
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// Shows the fade-in effect, followed by either the stage or BGM title or the
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// blinking DEMO PLAY text.
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#define overlay_stage_enter() \
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set_nearfunc_ptr_to_farfunc(overlay1, overlay_stage_enter_update_and_render)
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// Shows the fade-out effect. Must be called after a corresponding
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// overlay_stage_enter() transition!
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#define overlay_stage_leave() \
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set_nearfunc_ptr_to_farfunc(overlay1, overlay_stage_leave_update_and_render)
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// -----------------
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// Popup messages for common gameplay events, shown at the top of the playfield
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// ----------------------------------------------------------------------------
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enum popup_id_t {
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POPUP_ID_HISCORE_ENTRY = 0,
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POPUP_ID_EXTEND = 1,
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POPUP_ID_BONUS = 2,
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POPUP_ID_FULL_POWERUP = 3,
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#if (GAME == 5)
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POPUP_ID_DREAMBONUS_MAX = 4,
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#endif
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_popup_id_t_FORCE_UINT8 = 0xFF
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};
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extern popup_id_t overlay_popup_id_new;
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extern unsigned long overlay_popup_bonus;
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#define overlay_popup_show(popup_new) {\
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overlay_popup_id_new = popup_new; \
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set_nearfunc_ptr_to_farfunc(overlay2, overlay_popup_update_and_render); \
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}
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// ----------------------------------------------------------------------------
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// Stage and BGM titles
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// --------------------
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extern unsigned char bgm_title_id; // only used in TH04
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void near overlay_titles_invalidate(void);
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void pascal near overlay_titles_update_and_render(void);
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void pascal near overlay_boss_bgm_update_and_render(void);
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// --------------------
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