145 lines
1.7 KiB
C++
145 lines
1.7 KiB
C++
#pragma once
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#include <array>
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#include "util.hpp"
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class Bus;
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// bunch of registers or smthn
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typedef union
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{
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BYTE b;
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struct
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{
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BYTE mode : 2;
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BYTE coincidence : 1;
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BYTE mode0 : 1;
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BYTE mode1 : 1;
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BYTE mode2 : 1;
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BYTE lyc : 1;
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} w;
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} STAT;
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typedef union
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{
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BYTE b;
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struct
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{
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BYTE priority : 1;
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BYTE obj_enable : 1;
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BYTE obj_size : 1;
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BYTE bg_tilemap : 1;
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BYTE tiledata : 1;
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BYTE window : 1;
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BYTE window_tilemap : 1;
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BYTE enable : 1;
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} w;
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} LCDC;
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typedef union
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{
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WORD w;
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struct
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{
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BYTE lo, hi;
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} b;
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} LCDRegister;
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typedef struct
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{
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WORD spritePalette;
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WORD sprite;
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WORD highByte, lowByte;
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WORD full;
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} PixelFIFO;
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typedef struct
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{
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WORD tile;
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BYTE cycle;
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BYTE x, y;
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BYTE lo, hi;
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} PixelFetcher;
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typedef union
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{
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QWORD q;
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struct
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{
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BYTE y;
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BYTE x;
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BYTE idx;
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struct
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{
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BYTE padding : 4;
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BYTE palette : 1;
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BYTE xFlip : 1;
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BYTE yFlip : 1;
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BYTE bgPriority : 1;
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} attr;
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} b;
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} OAMEntry;
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typedef union
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{
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BYTE b;
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struct
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{
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BYTE idx0 : 2;
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BYTE idx1 : 2;
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BYTE idx2 : 2;
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BYTE idx3 : 2;
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} colors;
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} Palette;
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// The screen. With emphasis on ree
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class LCD
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{
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public:
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void Setup();
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void Tick();
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bool Read(WORD addr, BYTE& val);
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bool Write(WORD addr, BYTE val);
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DWORD cycles;
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WORD scanlineCycles;
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friend class Bus;
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friend class CPU;
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public:
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std::array<BYTE, 160 * 144> display;
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std::array<BYTE, 0x2000> vram;
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std::array<BYTE, 0xA0> oam;
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public:
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Bus* bus;
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// Registers
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LCDC lcdc;
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STAT stat;
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BYTE scy;
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BYTE scx;
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BYTE ly;
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BYTE lyc;
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BYTE wy;
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BYTE wx;
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Palette bgp;
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Palette obp0;
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Palette obp1;
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BYTE dma;
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PixelFetcher fetcher;
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PixelFIFO bgFIFO;
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PixelFIFO spriteFIFO;
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BYTE x;
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BYTE dmaCycles;
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bool windowMode;
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};
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