38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
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#include <stdlib.h>
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/*
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Copyright (c) 2021 Devine Lu Linvega
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Copyright (c) 2021 Andrew Alderwick
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE.
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*/
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typedef unsigned char Uint8;
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typedef unsigned short Uint16;
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typedef unsigned int Uint32;
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typedef struct Layer {
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Uint8 *pixels;
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Uint8 changed;
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} Layer;
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typedef struct Ppu {
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Uint32 palette[4];
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Uint16 width, height;
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Layer fg, bg;
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} Ppu;
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void ppu_palette(Ppu *p, Uint8 *addr);
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void ppu_resize(Ppu *p, Uint16 width, Uint16 height);
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void ppu_clear(Ppu *p, Layer *layer);
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void ppu_redraw(Ppu *p, Uint32 *screen);
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void ppu_write(Ppu *p, Layer *layer, Uint16 x, Uint16 y, Uint8 color);
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void ppu_blit(Ppu *p, Layer *layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy, Uint8 twobpp);
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void ppu_debug(Ppu *p, Uint8 *stack, Uint8 wptr, Uint8 rptr, Uint8 *memory);
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