mirror of
https://github.com/mkwong98/HDNes.git
synced 2024-05-20 13:07:54 -04:00
149 lines
2.5 KiB
C++
149 lines
2.5 KiB
C++
#pragma once
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struct sprite{
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Uint8 y;
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Uint8 x;
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Uint8 patternID;
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Uint8 paletteID;
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bool isBack;
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bool hFlip;
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bool vFlip;
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};
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class ppu
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{
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public:
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Uint8 lastRegWrite;
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bool enabled;
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bool signalNMI;
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bool signalFrameReady;
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bool oddFrame;
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Uint16 screenX;
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Uint16 screenY;
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Uint32 curCycle;
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Uint32 frameCount;
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unsigned int writeDisabledPeriod;
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Uint8 reg[8];
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sprite spriteList[64];
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//reg 2000
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Uint8 baseNameTableAddress;
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Uint8 aIncSize;
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Uint16 sprPatternTable;
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Uint16 bgTilePatternTable;
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bool useLargeSpr;
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Uint8 sprHeight;
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bool enableVBlank;
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void write2000(Uint8 data);
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//reg 2001
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bool useGrayscale;
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bool showBGOnLeft;
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bool showSprOnLeft;
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bool showBG;
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bool showSpr;
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bool intensifyR;
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bool intensifyG;
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bool intensifyB;
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void write2001(Uint8 data);
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//reg 2002
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bool sprOverflow;
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bool spr0hit;
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bool spr0hitDone;
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Uint8 spr0PatternData[8][2];
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Uint8 spr0PatternData2[8][2];
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bool vBlankFlag;
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bool oldVBlankFlag;
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Uint8 read2002();
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//reg 2003
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Uint8 oamAddress;
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void write2003(Uint8 data);
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//reg 2004
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void write2004(Uint8 data);
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Uint8 read2004();
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//shared by 2005, 2006
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bool newWrite;
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Uint8 offsetX;
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Uint16 tmpVRAMAddress;
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Uint16 vRAMAddress;
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//reg 2005
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void write2005(Uint8 data);
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//reg 2006
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void write2006(Uint8 data);
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//reg 2007
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void write2007(Uint8 data);
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Uint8 read2007();
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//sprite evaluation
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Uint8 dataToWriteOAM2;
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bool enableWriteOAM2;
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Uint16 spAddressToEval;
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Uint16 oam2AddressToWrite;
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Uint8 spFound;
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bool spEvalStateCheckY;
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bool spYInRange;
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Uint8 spBytesToCopy;
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//tile fretch
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Uint8 bgLoadingY;
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Uint8 bgTileToLoad;
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Uint16 bgFretchNameTableAddress;
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Uint8 bgPatternIDFretched[34];
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Uint8 bgPaletteFretched[34];
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Uint8 bgPatternDataFretched[34][2];
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Uint32 bgAddressFretched[34];
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Uint32 bgRAMAddress[34];
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Uint8 spTileToLoad;
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Uint8 spPatternDataFretched[8][2];
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Uint8 spRowFretched[8];
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Uint32 spAddressFretched[8];
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Uint32 spRAMAddress[8];
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bool isSp0;
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bool lastIsSp0;
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//rendering
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Uint8 currentBgTile;
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Uint8 currentBgX;
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Uint16 currentSpX[8];
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Uint8 tmpSprRAM2[32];
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void runCatchUp(unsigned int cycle);
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void runStep();
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void readSprList();
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Uint16 getSprPatternAddress(Uint8 patternID);
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ppu(void);
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~ppu(void);
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void init();
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void reset();
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void initState();
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void resetCycleCount();
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Uint8 readReg(Uint8 address);
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void writeReg(Uint8 address, Uint8 data);
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//4014
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void transferDMA(Uint8 data);
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void saveState(fstream* statefile);
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void loadState(fstream* statefile);
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void saveSprObjects(string path);
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void saveVRam(string path);
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};
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