experimental ddraw code

[picodrive.git] / platform / win32 / GenaDrive / Emu.cpp

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#include "app.h"\r
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unsigned short *EmuScreen=NULL;\r
int EmuWidth=0,EmuHeight=0;\r
static int EmuScan(unsigned int num, void *sdata);\r
unsigned char *PicoDraw2FB = NULL;\r
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int EmuInit()\r
{\r
  int len=0;\r
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  PicoInit();\r
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  // Allocate screen:\r
  EmuWidth=320; EmuHeight=224;\r
  len=EmuWidth*EmuHeight; len<<=1;\r
  EmuScreen=(unsigned short *)malloc(len); if (EmuScreen==NULL) return 1;\r
  PicoDraw2FB=(unsigned char *)malloc((8+320)*(8+224+8)*2);\r
  memset(EmuScreen,0,len);\r
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  PicoDrawSetColorFormat(1);\r
  PicoScan=EmuScan;\r
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  return 0;\r
}\r
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void EmuExit()\r
{\r
  //RomFree();\r
  free(EmuScreen); EmuScreen=NULL; // Deallocate screen\r
  free(PicoDraw2FB);\r
  EmuWidth=EmuHeight=0;\r
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  PicoExit();\r
}\r
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// Megadrive scanline callback:\r
static int EmuScan(unsigned int num, void *sdata)\r
{\r
  unsigned short *pd=NULL,*end=NULL;\r
  unsigned short *ps=NULL;\r
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  if (num>=(unsigned int)EmuHeight) return 0;\r
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  // Copy scanline to screen buffer:\r
  pd=EmuScreen+(num<<8)+(num<<6); end=pd+320;\r
  ps=(unsigned short *)sdata;\r
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  do { *pd++=*ps++; } while (pd<end);\r
  \r
  return 0;\r
}\r
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int EmuFrame()\r
{\r
  char map[12]={0,1,2,3,8,9,10,4,11,12,13,14};  // Joypads, format is UDLR BCAS ZYXM\r
  int a=0,input=0;\r
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  // Set Megadrive buttons:\r
  for (a=0;a<12;a++)\r
  {\r
    int m=map[a];\r
    if (m>=0) if (Inp.button[m]>30) input|=1<<a;\r
  }\r
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  PicoPad[0]=input;\r
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  PsndOut=(short *)DSoundNext; PicoFrame(); PsndOut=NULL;\r
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  return 0;\r
}\r
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int mp3_get_offset(void) // 0-1023\r
{\r
  return 0;\r
}\r
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void mp3_update(int *buffer, int length, int stereo)\r
{\r
}\r
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void mp3_start_play(FILE *f, int pos)\r
{\r
}\r
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int mp3_get_bitrate(FILE *f, int size)\r
{\r
  return -1;\r
}\r
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