86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
struct Background {
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Background(uint id) : id(id) {}
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alwaysinline auto hires() const -> bool;
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//background.cpp
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auto frame() -> void;
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auto scanline() -> void;
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auto begin() -> void;
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auto fetchNameTable() -> void;
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auto fetchOffset(uint y) -> void;
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auto fetchCharacter(uint index, bool half = 0) -> void;
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auto run(bool screen) -> void;
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auto power() -> void;
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//mode7.cpp
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alwaysinline auto clip(int n) -> int;
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auto runMode7() -> void;
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auto serialize(serializer&) -> void;
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struct ID { enum : uint { BG1, BG2, BG3, BG4 }; };
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const uint id;
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struct Mode { enum : uint { BPP2, BPP4, BPP8, Mode7, Inactive }; };
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struct ScreenSize { enum : uint { Size32x32, Size32x64, Size64x32, Size64x64 }; };
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struct TileSize { enum : uint { Size8x8, Size16x16 }; };
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struct Screen { enum : uint { Above, Below }; };
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struct IO {
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uint16 tiledataAddress;
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uint16 screenAddress;
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uint2 screenSize;
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uint1 tileSize;
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uint8 mode;
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uint8 priority[2];
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uint1 aboveEnable;
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uint1 belowEnable;
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uint16 hoffset;
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uint16 voffset;
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} io;
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struct Pixel {
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uint8 priority; //0 = none (transparent)
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uint8 palette;
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uint3 paletteGroup;
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} above, below;
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struct Output {
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Pixel above;
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Pixel below;
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} output;
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struct Mosaic {
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uint1 enable;
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uint16 hcounter;
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uint16 hoffset;
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Pixel pixel;
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} mosaic;
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struct OffsetPerTile {
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//set in BG3 only; used by BG1 and BG2
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uint16 hoffset;
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uint16 voffset;
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} opt;
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struct Tile {
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uint16 address;
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uint10 character;
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uint8 palette;
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uint3 paletteGroup;
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uint8 priority;
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uint1 hmirror;
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uint1 vmirror;
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uint16 data[4];
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} tiles[66];
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uint7 renderingIndex;
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uint3 pixelCounter;
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friend class PPU;
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};
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