47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#ifndef _DLL_H
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#define _DLL_H
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#include "atari7800.h"
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#define DLL_FLAGS DLL_H16 // 4k DMA holes
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#define SLOTHEIGHT 16 // lines per display list
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#define SLOTSIZE 32 // bytes per display list
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#define SLOTSPERPAGE 16 // display lists per page
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#define DOUBLEBUFFER // double buffer (2 pages)
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#define DLSAVE // enable save buffer
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#ifdef DOUBLEBUFFER
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#define NUMPAGES 2
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#else
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#define NUMPAGES 1
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#endif
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#define NUMSLOTS (SLOTSPERPAGE*NUMPAGES)
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extern DLLEntry DLL[NUMSLOTS]; // display list list
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extern byte DL[NUMSLOTS][SLOTSIZE]; // display list slots
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extern byte DL_len[NUMSLOTS]; // current bytes in each slot
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#ifdef DLSAVE
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extern byte DL_save[NUMSLOTS]; // save lengths of each slot
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#endif
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// set current page (0 or 1)
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#define dll_page(page) (slot0 = (page)*SLOTSPERPAGE)
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extern byte slot0;
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void dll_setup(void);
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void dll_add_string(const char* str, byte x, byte y, byte wpal);
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void dll_add_sprite(word addr, byte x, byte y, byte wpal);
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sbyte dll_bytesleft(byte slot);
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void* dll_alloc(byte slot, byte len);
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void dll_set_scroll(byte y);
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void dll_save(void);
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void dll_restore(void);
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void dll_restore_all(void);
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void dll_clear(void);
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void dll_swap(void);
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void dll_copy(void);
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#endif
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