mirror of https://github.com/bsnes-emu/bsnes.git
83 lines
1.6 KiB
C++
83 lines
1.6 KiB
C++
struct Background {
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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 { Main, Sub }; };
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Background(PPU& self, uint id);
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struct Regs {
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uint16 tiledata_addr;
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uint16 screen_addr;
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uint2 screen_size;
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uint4 mosaic;
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bool tile_size;
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uint mode;
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uint priority0;
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uint priority1;
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bool main_enable;
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bool sub_enable;
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uint16 hoffset;
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uint16 voffset;
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} regs;
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struct Cache {
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uint16 hoffset;
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uint16 voffset;
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} cache;
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alwaysinline auto voffset() const -> uint;
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alwaysinline auto hoffset() const -> uint;
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struct Output {
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struct Pixel {
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uint priority; //0 = none (transparent)
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uint8 palette;
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uint16 tile;
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} main, sub;
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} output;
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struct Mosaic : Output::Pixel {
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uint vcounter;
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uint voffset;
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uint hcounter;
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uint hoffset;
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} mosaic;
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struct {
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int x;
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int y;
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uint tile_counter;
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uint tile;
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uint priority;
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uint palette_number;
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uint palette_index;
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uint8 data[8];
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};
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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 run(bool screen) -> void;
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auto reset() -> void;
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auto get_tile() -> void;
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auto get_tile_color() -> uint;
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auto get_tile(uint x, uint y) -> uint;
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alwaysinline auto clip(int n) -> int;
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auto begin_mode7() -> void;
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auto run_mode7() -> void;
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auto serialize(serializer&) -> void;
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PPU& self;
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friend class PPU;
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};
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