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/**
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* @file engine.h
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*
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* of basic engine helper functions:
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* - Sprite blitting
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* - Drawing
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* - Angle calculation
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* - RNG
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* - Memory allocation
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* - File loading
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* - Video playback
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*/
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#ifndef __ENGINE_H__
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#define __ENGINE_H__
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//offset 0
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//pCelBuff->pFrameTable[0]
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/** automap pixel color 8-bit (palette entry) */
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extern char gbPixelCol;
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/** flip - if y < x */
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extern BOOL gbRotateMap;
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/** Seed value before the most recent call to SetRndSeed() */
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extern int orgseed;
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/** Track number of calls to GetRndSeed() since last call to SetRndSeed() */
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extern int SeedCount;
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/** valid - if x/y are in bounds */
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extern BOOL gbNotInView;
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__FINLINE BYTE *CelGetFrame(BYTE *pCelBuff, int nCel, int *nDataSize);
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void CelBlit(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void CelDraw(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth);
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void CelBlitFrame(BYTE *pBuff, BYTE *pCelBuff, int nCel, int nWidth);
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void CelClippedDraw(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelClippedBlit(BYTE *pBuff, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelBlitLight(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void CelBlitLightTrans(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void CelDrawLight(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth);
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void CelClippedDrawLight(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelClippedBlitLightTrans(BYTE *pBuff, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelDrawLightRed(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap, char light);
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void CelBlitSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void CelClippedDrawSafe(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelClippedBlitSafe(BYTE *pBuff, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelBlitLightSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void CelBlitLightTransSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void CelDrawLightSafe(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelClippedBlitLightTransSafe(BYTE *pBuff, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelDrawLightRedSafe(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap, char light);
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void CelBlitWidth(BYTE *pBuff, int x, int y, int wdt, BYTE *pCelBuff, int nCel, int nWidth);
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void CelBlitOutline(char col, int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void CelBlitOutlineSafe(char col, int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void ENG_set_pixel(int sx, int sy, BYTE col);
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void engine_draw_pixel(int sx, int sy);
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void DrawLine(int x0, int y0, int x1, int y1, BYTE col);
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int GetDirection(int x1, int y1, int x2, int y2);
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void SetRndSeed(int s);
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int GetRndSeed();
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int random_(BYTE idx, int v);
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void engine_debug_trap(BOOL show_cursor);
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BYTE *DiabloAllocPtr(DWORD dwBytes);
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void mem_free_dbg(void *p);
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BYTE *LoadFileInMem(char *pszName, DWORD *pdwFileLen);
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DWORD LoadFileWithMem(const char *pszName, void *p);
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void Cl2ApplyTrans(BYTE *p, BYTE *ttbl, int nCel);
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void Cl2Draw(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void Cl2Blit(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void Cl2DrawOutline(char col, int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void Cl2BlitOutline(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth, char col);
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void Cl2DrawLightTbl(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap, char light);
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void Cl2BlitLight(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth, BYTE *pTable);
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void Cl2DrawLight(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void Cl2DrawSafe(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void Cl2BlitSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth);
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void Cl2DrawOutlineSafe(char col, int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void Cl2BlitOutlineSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth, char col);
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void Cl2DrawLightTblSafe(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap, char light);
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void Cl2BlitLightSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth, BYTE *pTable);
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void Cl2DrawLightSafe(int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth, int CelSkip, int CelCap);
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void PlayInGameMovie(char *pszMovie);
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/* rdata */
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extern const int RndInc;
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extern const int RndMult;
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#endif /* __ENGINE_H__ */
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