o cleanup

tools/bsnes/snes/input/input.hpp

@@ -0,0 +1,114 @@
+class Input {
+public:
+  enum Device {
+    DeviceNone,
+    DeviceJoypad,
+    DeviceMultitap,
+    DeviceMouse,
+    DeviceSuperScope,
+    DeviceJustifier,
+    DeviceJustifiers,
+  };
+
+  enum DeviceID {
+    DeviceIDNone,
+    DeviceIDJoypad1,
+    DeviceIDJoypad2,
+    DeviceIDMultitap1A,
+    DeviceIDMultitap1B,
+    DeviceIDMultitap1C,
+    DeviceIDMultitap1D,
+    DeviceIDMultitap2A,
+    DeviceIDMultitap2B,
+    DeviceIDMultitap2C,
+    DeviceIDMultitap2D,
+    DeviceIDMouse1,
+    DeviceIDMouse2,
+    DeviceIDSuperScope,
+    DeviceIDJustifier1,
+    DeviceIDJustifier2,
+  };
+
+  enum JoypadID {
+    JoypadB      =  0, JoypadY      =  1,
+    JoypadSelect =  2, JoypadStart  =  3,
+    JoypadUp     =  4, JoypadDown   =  5,
+    JoypadLeft   =  6, JoypadRight  =  7,
+    JoypadA      =  8, JoypadX      =  9,
+    JoypadL      = 10, JoypadR      = 11,
+  };
+
+  enum MouseID {
+    MouseX    = 0, MouseY     = 1,
+    MouseLeft = 2, MouseRight = 3,
+  };
+
+  enum SuperScopeID {
+    SuperScopeX       = 0, SuperScopeY      = 1,
+    SuperScopeTrigger = 2, SuperScopeCursor = 3,
+    SuperScopeTurbo   = 4, SuperScopePause  = 5,
+  };
+
+  enum JustifierID {
+    JustifierX       = 0, JustifierY     = 1,
+    JustifierTrigger = 2, JustifierStart = 3,
+  };
+
+  uint8 port_read(bool port);
+  void port_set_device(bool port, unsigned device);
+  void init();
+  void poll();
+  void update();
+
+  //light guns (Super Scope, Justifier(s)) strobe IOBit whenever the CRT
+  //beam cannon is detected. this needs to be tested at the cycle level
+  //(hence inlining here for speed) to avoid 'dead space' during DRAM refresh.
+  //iobit is updated during port_set_device(),
+  //latchx, latchy are updated during update() (once per frame)
+  alwaysinline void tick() {
+    //only test if Super Scope or Justifier is connected
+    if(iobit) {
+      if(ppu.vcounter() == latchy               //test Y cursor position
+      && ppu.hcounter() == latchx << 2          //test X cursor position (cycles == pixels << 2)
+      && latchy < (ppu.overscan() ? 240 : 225)  //verify Y is not offscreen
+      && latchx < 256                           //verify X is not offscreen
+      ) ppu.latch_counters();
+    }
+  }
+
+private:
+  bool iobit;
+  uint16_t latchx, latchy;
+
+  struct port_t {
+    unsigned device;
+    unsigned counter0;  //read counters
+    unsigned counter1;
+
+    struct superscope_t {
+      int x, y;
+
+      bool trigger;
+      bool cursor;
+      bool turbo;
+      bool pause;
+      bool offscreen;
+
+      bool turbolock;
+      bool triggerlock;
+      bool pauselock;
+    } superscope;
+
+    struct justifier_t {
+      bool active;
+
+      int x1, x2;
+      int y1, y2;
+
+      bool trigger1, trigger2;
+      bool start1, start2;
+    } justifier;
+  } port[2];
+
+  friend class SNES;
+} input;