First stab at abstracting the TIA interface.

src/emucore/AbstractTIA.hxx

@@ -0,0 +1,108 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll       
+//  SS  SS   tt           ll   ll        
+//  SS     tttttt  eeee   ll   ll   aaaa 
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2016 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//
+// $Id$
+//============================================================================
+
+#ifndef ABSTRACT_TIA_HXX
+#define ABSTRACT_TIA_HXX
+
+#include "bspf.hxx"
+#include "Device.hxx"
+#include "Serializer.hxx"
+#include "TIATypes.hxx"
+
+class AbstractTIA: public Device
+{
+  public:
+
+    virtual ~AbstractTIA() = default;
+
+    virtual void frameReset() = 0;
+
+    virtual bool saveDisplay(Serializer& out) const = 0;
+
+    virtual bool loadDisplay(Serializer& in) = 0;
+
+    virtual void update() = 0;
+
+    virtual const uInt8* currenFrameBuffer() const = 0;
+
+    virtual const uInt8 previousFrameBuffer() const = 0;
+
+    virtual uInt32 width() const {
+      return 160;
+    }
+
+    virtual uInt32 height() const = 0;
+
+    virtual uInt32 ystart() const = 0;
+
+    virtual void setHeight(uInt32 height) = 0;
+
+    virtual void setWidth(uInt32 width) = 0;
+
+    virtual void enableAutoFrame(bool enabled) = 0;
+
+    virtual void enableColorLoss(bool enabled) = 0;
+
+    virtual bool isPAL() const = 0;
+
+    virtual uInt32 clocksThisLine() const = 0;
+
+    virtual uInt32 scanlines() const = 0;
+
+    virtual bool partialFrame() const = 0;
+
+    virtual uInt32 startScanline() const = 0;
+
+    virtual bool scanlinePos(uInt16& x, uInt16& y) = 0;
+
+    virtual bool toggleBit(TIABit b, uInt8 mode = 2) = 0;
+
+    virtual bool toggleBits() = 0;
+
+    virtual bool toggleCollision(TIABit b, uInt8 mode = 2) = 0;
+
+    virtual bool toogleCollisions() = 0;
+
+    virtual bool toggleHMOVEBlank() = 0;
+
+    virtual bool toggleFixedColor(uInt8 mode = 2) = 0;
+
+    virtual bool driveUnusedPinsRandom(uInt8 mode = 2) = 0;
+
+    virtual bool toggleJitter(uInt8 mode = 2) = 0;
+
+    virtual void setJitterRecoveryFactor(Int32 f) = 0;
+
+    #ifdef DEBUGGER_SUPPORT
+
+      virtual void updateScanline() = 0;
+
+      virtual void updateScanlineByStep() = 0;
+
+      virtual void updateScanlineByTrace(int targetAddress) = 0; 
+
+    #endif
+
+  protected:
+
+    AbstractTIA() {}
+
+};
+
+#endif